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1
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jbe@58
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2 /*** Version ***/
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3 #define MOONBR_VERSION_STRING "1.0.1"
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4
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5
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6 /*** Compile-time configuration ***/
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7
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8 #define MOONBR_LUA_PANIC_BUG_WORKAROUND 1
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9
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10
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11 /*** C preprocessor macros for portability support ***/
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12
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13 #ifndef __has_include
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14 #define __has_include(x) 0
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15 #endif
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16
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17
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18 /*** Include directives for used system libraries ***/
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19
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20 #include <stdlib.h>
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21 #include <stdint.h>
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22 #include <string.h>
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23 #include <errno.h>
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24 #include <unistd.h>
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25 #include <signal.h>
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26 #include <fcntl.h>
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27 #include <sys/wait.h>
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28 #include <sys/resource.h>
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29 #include <poll.h>
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30 #include <time.h>
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31 #include <sys/time.h>
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32 #include <sys/socket.h>
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33 #include <sys/un.h>
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34 #include <netinet/in.h>
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35 #include <netdb.h>
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36 #include <arpa/inet.h>
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37 #include <getopt.h>
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38 #include <sys/file.h>
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39 #include <syslog.h>
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40 #if defined(__FreeBSD__) || __has_include(<libutil.h>)
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41 #include <libutil.h>
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42 #endif
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43 #if defined(__linux__) || __has_include(<bsd/libutil.h>)
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44 #include <bsd/libutil.h>
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45 #endif
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46 #if defined(__linux__) || __has_include(<bsd/unistd.h>)
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47 #include <bsd/unistd.h>
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48 #endif
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49
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50
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51 /*** Fallback definitions for missing constants on some platforms ***/
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52
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53 /* INFTIM is used as timeout parameter for poll() */
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54 #ifndef INFTIM
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55 #define INFTIM -1
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56 #endif
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57
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58
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59 /*** Include directives for Lua ***/
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60
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61 #include <lua.h>
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62 #include <lauxlib.h>
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63 #include <lualib.h>
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64
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65
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66 /*** Include directive for moonbridge_io library ***/
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67
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68 #include "moonbridge_io.h"
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69
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70
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71 /*** Constants ***/
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72
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73 /* Backlog option for listen() call */
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74 #define MOONBR_LISTEN_BACKLOG 1024
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75
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76 /* Maximum length of a timestamp used for strftime() */
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77 #define MOONBR_LOG_MAXTIMELEN 40
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78
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79 /* Maximum length of a log message */
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80 #define MOONBR_LOG_MAXMSGLEN 4095
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81
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82 /* Exitcodes passed to exit() call */
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83 #define MOONBR_EXITCODE_GRACEFUL 0
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84 #define MOONBR_EXITCODE_CMDLINEERROR 1
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85 #define MOONBR_EXITCODE_ALREADYRUNNING 2
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86 #define MOONBR_EXITCODE_STARTUPERROR 3
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87 #define MOONBR_EXITCODE_RUNTIMEERROR 4
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88
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89 /* Maximum length of a line sent to stderr by child processes */
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90 #define MOONBR_MAXERRORLINELEN 1024
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91
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92 /* Maximum length of an error string returned by strerror() */
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93 #define MOONBR_MAXSTRERRORLEN 80
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94
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95 /* Error message for noncompliant strerror_r() implementation on GNU systems */
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96 #define MOONBR_STRERROR_R_MSG "Error detail unavailable due to noncompliant strerror_r() implementation"
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97
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98 /* Status bytes exchanged between master and child processes */
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jbe@124
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99 #define MOONBR_STATUS_IDLE 'I'
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100 #define MOONBR_COMMAND_CONNECT 'C'
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101 #define MOONBR_COMMAND_TERMINATE 'T'
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102 #define MOONBR_STATUS_GOODBYE 'B'
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103
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104 /* Constant file descriptors */
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105 #define MOONBR_FD_STDERR 2
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106 #define MOONBR_FD_CONTROL 3
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107 #define MOONBR_FD_END 4
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108
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109 /* Return values of moonbr_try_destroy_worker() */
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110 #define MOONBR_DESTROY_NONE 0
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111 #define MOONBR_DESTROY_PREPARE 1
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112 #define MOONBR_DESTROY_IDLE_OR_ASSIGNED 2
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113
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114
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jbe@0
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115 /*** Types ***/
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116
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117 /* Enum for 'moonbr_pstate' */
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118 #define MOONBR_PSTATE_STARTUP 0
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119 #define MOONBR_PSTATE_RUNNING 1
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120 #define MOONBR_PSTATE_FORKED 2
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121
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122 /* Enum for 'proto' field of struct moonbr_listener */
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jbe@274
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123 #define MOONBR_PROTO_INTERVAL 1
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124 #define MOONBR_PROTO_LOCAL 2
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125 #define MOONBR_PROTO_TCP 3
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126
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127 /* Data structure for a pool's listener that can accept incoming connections */
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128 struct moonbr_listener {
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129 struct moonbr_pool *pool;
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130 struct moonbr_listener *prev_listener; /* previous idle or(!) connected listener */
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131 struct moonbr_listener *next_listener; /* next idle or(!) connected listener */
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132 int proto;
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133 union {
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134 struct {
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135 char *name; /* name of interval passed to 'connect' function as 'interval' field in table */
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136 int main; /* nonzero = termination of 'connect' function causes shutdown */
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137 int strict; /* nonzero = runtime of 'connect' function does not delay interval */
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jbe@0
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138 struct timeval delay; /* interval between invocations of 'connect' function */
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139 struct timeval wakeup; /* point in time of next invocation */
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140 } interval;
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141 struct {
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jbe@125
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142 union {
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jbe@125
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143 struct sockaddr addr_abstract;
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144 struct sockaddr_un addr_un;
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145 struct sockaddr_in addr_in;
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146 struct sockaddr_in6 addr_in6;
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jbe@125
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147 } addr;
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148 socklen_t addrlen;
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149 } socket;
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150 } type_specific;
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151 union {
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152 struct {
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153 char ip[INET6_ADDRSTRLEN]; /* IP to listen on */
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154 int port; /* port number to listen on (in host endianess) */
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155 } tcp;
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156 } proto_specific;
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157 int listenfd; /* -1 = none */
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158 int pollidx; /* -1 = none */
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159 };
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160
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161 /* Data structure for a child process that is handling incoming connections */
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162 struct moonbr_worker {
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163 struct moonbr_pool *pool;
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164 struct moonbr_worker *prev_worker;
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165 struct moonbr_worker *next_worker;
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166 struct moonbr_worker *prev_idle_worker;
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167 struct moonbr_worker *next_idle_worker;
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168 int main; /* nonzero = terminate Moonbridge when this worker dies */
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169 int idle; /* nonzero = waiting for command from parent process */
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170 int assigned; /* nonzero = currently handling a connection */
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171 pid_t pid;
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172 int controlfd; /* socket to send/receive control message to/from child process */
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173 int errorfd; /* socket to receive error output from child process' stderr */
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174 char *errorlinebuf; /* optional buffer for collecting stderr data from child process */
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175 int errorlinelen; /* number of bytes stored in 'errorlinebuf' */
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176 int errorlineovf; /* nonzero = line length overflow */
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177 struct timeval idle_expiration; /* point in time until child process may stay in idle state */
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178 struct moonbr_listener *restart_interval_listener; /* set while interval listener is assigned */
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179 };
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180
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181 /* Data structure for a pool of workers and listeners */
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182 struct moonbr_pool {
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183 int poolnum; /* number of pool for log output */
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184 struct moonbr_pool *next_pool; /* next entry in linked list starting with 'moonbr_first_pool' */
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185 struct moonbr_worker *first_worker; /* first worker of pool */
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186 struct moonbr_worker *last_worker; /* last worker of pool */
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187 struct moonbr_worker *first_idle_worker; /* first idle worker of pool */
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188 struct moonbr_worker *last_idle_worker; /* last idle worker of pool */
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189 int idle_worker_count;
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190 int unassigned_worker_count;
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191 int total_worker_count;
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192 int worker_count_stat; /* only needed for statistics */
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193 int pre_fork; /* desired minimum number of unassigned workers */
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194 int min_fork; /* desired minimum number of workers in total */
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195 int max_fork; /* maximum number of workers */
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jbe@0
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196 struct timeval fork_delay; /* delay after each fork() until a fork may happen again */
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jbe@0
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197 struct timeval fork_wakeup; /* point in time when a fork may happen again (unless a worker terminates before) */
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198 struct timeval fork_error_delay; /* delay between fork()s when an error during fork or preparation occurred */
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199 struct timeval fork_error_wakeup; /* point in time when fork may happen again if an error in preparation occurred */
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jbe@0
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200 int use_fork_error_wakeup; /* nonzero = error in preparation occured; gets reset on next fork */
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jbe@0
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201 struct timeval exit_delay; /* delay for terminating excessive workers (unassigned_worker_count > pre_fork) */
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202 struct timeval exit_wakeup; /* point in time when terminating an excessive worker */
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203 struct timeval idle_timeout; /* delay before an idle worker is terminated */
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204 size_t memory_limit; /* maximum bytes of memory that the Lua machine may allocate */
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205 int listener_count; /* total number of listeners of pool (and size of 'listener' array at end of this struct) */
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206 struct moonbr_listener *first_idle_listener; /* first listener that is idle (i.e. has no waiting connection) */
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207 struct moonbr_listener *last_idle_listener; /* last listener that is idle (i.e. has no waiting connection) */
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208 struct moonbr_listener *first_connected_listener; /* first listener that has a pending connection */
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209 struct moonbr_listener *last_connected_listener; /* last listener that has a pending connection */
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210 struct moonbr_listener listener[1]; /* static array of variable(!) size to contain 'listener' structures */
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211 };
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212
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213 /* Enum for 'channel' field of struct moonbr_poll_worker */
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214 #define MOONBR_POLL_WORKER_CONTROLCHANNEL 1
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jbe@0
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215 #define MOONBR_POLL_WORKER_ERRORCHANNEL 2
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216
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jbe@0
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217 /* Structure to refer from 'moonbr_poll_worker_fds' entry to worker structure */
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jbe@0
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218 struct moonbr_poll_worker {
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219 struct moonbr_worker *worker;
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jbe@0
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220 int channel; /* field indicating whether file descriptor is 'controlfd' or 'errorfd' */
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221 };
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222
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223 /* Variable indicating that clean shutdown was requested */
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224 static int moonbr_shutdown_in_progress = 0;
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225
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226
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jbe@0
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227 /*** Macros for Lua registry ***/
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228
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229 /* Lightuserdata keys for Lua registry to store 'prepare', 'connect', and 'finish' functions */
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230 #define moonbr_luakey_prepare_func(pool) ((void *)(intptr_t)(pool) + 0)
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231 #define moonbr_luakey_connect_func(pool) ((void *)(intptr_t)(pool) + 1)
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232 #define moonbr_luakey_finish_func(pool) ((void *)(intptr_t)(pool) + 2)
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233
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234
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jbe@0
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235 /*** Global variables ***/
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236
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237 /* State of process execution */
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238 static int moonbr_pstate = MOONBR_PSTATE_STARTUP;
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239
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240 /* Process ID of the main process */
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241 static pid_t moonbr_masterpid;
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242
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jbe@0
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243 /* Condition variables set by the signal handler */
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244 static volatile sig_atomic_t moonbr_cond_poll = 0;
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245 static volatile sig_atomic_t moonbr_cond_terminate = 0;
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246 static volatile sig_atomic_t moonbr_cond_interrupt = 0;
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jbe@0
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247 static volatile sig_atomic_t moonbr_cond_child = 0;
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jbe@0
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248
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jbe@0
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249 /* Socket pair to denote signal delivery when signal handler was called just before poll() */
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jbe@0
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250 static int moonbr_poll_signalfds[2];
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jbe@0
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251 #define moonbr_poll_signalfd_read moonbr_poll_signalfds[0]
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252 #define moonbr_poll_signalfd_write moonbr_poll_signalfds[1]
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jbe@0
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253
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jbe@0
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254 /* Global variables for pidfile and logging */
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jbe@0
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255 static struct pidfh *moonbr_pidfh = NULL;
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jbe@0
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256 static FILE *moonbr_logfile = NULL;
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jbe@0
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257 static int moonbr_use_syslog = 0;
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jbe@0
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258
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jbe@0
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259 /* First and last entry of linked list of all created pools during initialization */
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jbe@0
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260 static struct moonbr_pool *moonbr_first_pool = NULL;
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jbe@0
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261 static struct moonbr_pool *moonbr_last_pool = NULL;
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jbe@0
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262
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jbe@0
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263 /* Total count of pools */
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jbe@0
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264 static int moonbr_pool_count = 0;
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265
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jbe@0
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266 /* Set to a nonzero value if dynamic part of 'moonbr_poll_fds' ('moonbr_poll_worker_fds') needs an update */
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jbe@0
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267 static int moonbr_poll_refresh_needed = 0;
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jbe@0
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268
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jbe@0
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269 /* Array passed to poll(), consisting of static part and dynamic part ('moonbr_poll_worker_fds') */
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jbe@0
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270 static struct pollfd *moonbr_poll_fds = NULL; /* the array */
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jbe@0
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271 static int moonbr_poll_fds_bufsize = 0; /* memory allocated for this number of elements */
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jbe@0
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272 static int moonbr_poll_fds_count = 0; /* total number of elements */
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jbe@0
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273 static int moonbr_poll_fds_static_count; /* number of elements in static part */
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274
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jbe@0
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275 /* Dynamic part of 'moonbr_poll_fds' array */
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276 #define moonbr_poll_worker_fds (moonbr_poll_fds+moonbr_poll_fds_static_count)
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277
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jbe@0
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278 /* Additional information for dynamic part of 'moonbr_poll_fds' array */
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jbe@0
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279 struct moonbr_poll_worker *moonbr_poll_workers; /* the array */
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jbe@0
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280 static int moonbr_poll_workers_bufsize = 0; /* memory allocated for this number of elements */
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jbe@0
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281 static int moonbr_poll_worker_count = 0; /* number of elements in array */
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282
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jbe@0
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283 /* Variable set to nonzero value to disallow further calls of 'listen' function */
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284 static int moonbr_booted = 0;
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285
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jbe@0
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286 /* Verbosity settings */
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287 static int moonbr_debug = 0;
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288 static int moonbr_stat = 0;
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289
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jbe@0
|
290 /* Memory consumption by Lua machine */
|
|
jbe@0
|
291 static size_t moonbr_memory_usage = 0;
|
|
jbe@0
|
292 static size_t moonbr_memory_limit = 0;
|
|
jbe@0
|
293
|
|
jbe@0
|
294
|
|
jbe@0
|
295 /*** Functions for signal handling ***/
|
|
jbe@0
|
296
|
|
jbe@0
|
297 /* Signal handler for master and child processes */
|
|
jbe@0
|
298 static void moonbr_signal(int sig) {
|
|
jbe@265
|
299 int errno2 = errno; /* backup errno variable */
|
|
jbe@0
|
300 if (getpid() == moonbr_masterpid) {
|
|
jbe@0
|
301 /* master process */
|
|
jbe@0
|
302 switch (sig) {
|
|
jbe@0
|
303 case SIGHUP:
|
|
jbe@0
|
304 case SIGINT:
|
|
jbe@0
|
305 /* fast shutdown requested */
|
|
jbe@0
|
306 moonbr_cond_interrupt = 1;
|
|
jbe@0
|
307 break;
|
|
jbe@0
|
308 case SIGTERM:
|
|
jbe@0
|
309 /* clean shutdown requested */
|
|
jbe@0
|
310 moonbr_cond_terminate = 1;
|
|
jbe@0
|
311 break;
|
|
jbe@0
|
312 case SIGCHLD:
|
|
jbe@0
|
313 /* child process terminated */
|
|
jbe@0
|
314 moonbr_cond_child = 1;
|
|
jbe@0
|
315 break;
|
|
jbe@0
|
316 }
|
|
jbe@0
|
317 if (moonbr_cond_poll) {
|
|
jbe@0
|
318 /* avoid race condition if signal handler is invoked right before poll() */
|
|
jbe@0
|
319 char buf[1] = {0};
|
|
jbe@20
|
320 write(moonbr_poll_signalfd_write, buf, 1);
|
|
jbe@0
|
321 }
|
|
jbe@0
|
322 } else {
|
|
jbe@0
|
323 /* child process forwards certain signals to parent process */
|
|
jbe@0
|
324 switch (sig) {
|
|
jbe@0
|
325 case SIGHUP:
|
|
jbe@0
|
326 case SIGINT:
|
|
jbe@0
|
327 kill(moonbr_masterpid, sig);
|
|
jbe@0
|
328 }
|
|
jbe@0
|
329 }
|
|
jbe@265
|
330 errno = errno2; /* restore errno from backup */
|
|
jbe@0
|
331 }
|
|
jbe@0
|
332
|
|
jbe@0
|
333 /* Initialize signal handling */
|
|
jbe@0
|
334 static void moonbr_signal_init(){
|
|
jbe@0
|
335 moonbr_masterpid = getpid();
|
|
jbe@0
|
336 signal(SIGHUP, moonbr_signal);
|
|
jbe@0
|
337 signal(SIGINT, moonbr_signal);
|
|
jbe@0
|
338 signal(SIGTERM, moonbr_signal);
|
|
jbe@0
|
339 signal(SIGCHLD, moonbr_signal);
|
|
jbe@0
|
340 }
|
|
jbe@0
|
341
|
|
jbe@0
|
342
|
|
jbe@0
|
343 /*** Functions for logging in master process ***/
|
|
jbe@0
|
344
|
|
jbe@0
|
345 /* Logs a pre-formatted message with given syslog() priority */
|
|
jbe@0
|
346 static void moonbr_log_msg(int priority, const char *msg) {
|
|
jbe@0
|
347 if (moonbr_logfile) {
|
|
jbe@0
|
348 /* logging to logfile desired (timestamp is prepended in that case) */
|
|
jbe@0
|
349 time_t now_time = 0;
|
|
jbe@0
|
350 struct tm now_tmstruct;
|
|
jbe@0
|
351 char timestr[MOONBR_LOG_MAXTIMELEN+1];
|
|
jbe@0
|
352 time(&now_time);
|
|
jbe@0
|
353 localtime_r(&now_time, &now_tmstruct);
|
|
jbe@0
|
354 if (!strftime(
|
|
jbe@0
|
355 timestr, MOONBR_LOG_MAXTIMELEN+1, "%Y-%m-%d %H:%M:%S %Z: ", &now_tmstruct
|
|
jbe@0
|
356 )) timestr[0] = 0;
|
|
jbe@0
|
357 fprintf(moonbr_logfile, "%s%s\n", timestr, msg);
|
|
jbe@0
|
358 }
|
|
jbe@0
|
359 if (moonbr_use_syslog) {
|
|
jbe@0
|
360 /* logging through syslog desired */
|
|
jbe@0
|
361 syslog(priority, "%s", msg);
|
|
jbe@0
|
362 }
|
|
jbe@0
|
363 }
|
|
jbe@0
|
364
|
|
jbe@0
|
365 /* Formats a message via vsnprintf() and logs it with given syslog() priority */
|
|
jbe@0
|
366 static void moonbr_log(int priority, const char *message, ...) {
|
|
jbe@0
|
367 char msgbuf[MOONBR_LOG_MAXMSGLEN+1]; /* buffer of static size to store formatted message */
|
|
jbe@0
|
368 int msglen; /* length of full message (may exceed MOONBR_LOG_MAXMSGLEN) */
|
|
jbe@0
|
369 {
|
|
jbe@0
|
370 /* pass variable arguments to vsnprintf() to format message */
|
|
jbe@0
|
371 va_list ap;
|
|
jbe@0
|
372 va_start(ap, message);
|
|
jbe@0
|
373 msglen = vsnprintf(msgbuf, MOONBR_LOG_MAXMSGLEN+1, message, ap);
|
|
jbe@0
|
374 va_end(ap);
|
|
jbe@0
|
375 }
|
|
jbe@0
|
376 {
|
|
jbe@0
|
377 /* split and log message line by line */
|
|
jbe@0
|
378 char *line = msgbuf;
|
|
jbe@0
|
379 while (1) {
|
|
jbe@0
|
380 char *endptr = strchr(line, '\n');
|
|
jbe@0
|
381 if (endptr) {
|
|
jbe@0
|
382 /* terminate string where newline character is found */
|
|
jbe@0
|
383 *endptr = 0;
|
|
jbe@0
|
384 } else if (line != msgbuf && msglen > MOONBR_LOG_MAXMSGLEN) {
|
|
jbe@0
|
385 /* break if line is incomplete and not the first line */
|
|
jbe@0
|
386 break;
|
|
jbe@0
|
387 }
|
|
jbe@0
|
388 moonbr_log_msg(priority, line);
|
|
jbe@0
|
389 if (!endptr) break; /* break if end of formatted message is reached */
|
|
jbe@0
|
390 line = endptr+1; /* otherwise continue with remaining message */
|
|
jbe@0
|
391 }
|
|
jbe@0
|
392 }
|
|
jbe@0
|
393 if (msglen > MOONBR_LOG_MAXMSGLEN) {
|
|
jbe@0
|
394 /* print warning if message was truncated */
|
|
jbe@0
|
395 moonbr_log_msg(priority, "Previous log message has been truncated due to excessive length");
|
|
jbe@0
|
396 }
|
|
jbe@0
|
397 }
|
|
jbe@0
|
398
|
|
jbe@0
|
399
|
|
jbe@0
|
400 /*** Termination function ***/
|
|
jbe@0
|
401
|
|
jbe@0
|
402 /* Kill all child processes, remove PID file (if existent), and exit master process with given exitcode */
|
|
jbe@0
|
403 static void moonbr_terminate(int exitcode) {
|
|
jbe@0
|
404 {
|
|
jbe@0
|
405 struct moonbr_pool *pool;
|
|
jbe@0
|
406 for (pool=moonbr_first_pool; pool; pool=pool->next_pool) {
|
|
jbe@0
|
407 {
|
|
jbe@0
|
408 struct moonbr_worker *worker;
|
|
jbe@0
|
409 for (worker=pool->first_worker; worker; worker=worker->next_worker) {
|
|
jbe@0
|
410 moonbr_log(LOG_INFO, "Sending SIGKILL to child with PID %i", (int)worker->pid);
|
|
jbe@0
|
411 if (kill(worker->pid, SIGKILL)) {
|
|
jbe@0
|
412 moonbr_log(LOG_ERR, "Error while killing child process: %s", strerror(errno));
|
|
jbe@0
|
413 }
|
|
jbe@0
|
414 }
|
|
jbe@0
|
415 }
|
|
jbe@0
|
416 {
|
|
jbe@0
|
417 int i;
|
|
jbe@0
|
418 for (i=0; i<pool->listener_count; i++) {
|
|
jbe@0
|
419 struct moonbr_listener *listener = &pool->listener[i];
|
|
jbe@0
|
420 if (listener->proto == MOONBR_PROTO_LOCAL) {
|
|
jbe@125
|
421 moonbr_log(LOG_INFO, "Unlinking local socket \"%s\"", listener->type_specific.socket.addr.addr_un.sun_path);
|
|
jbe@125
|
422 if (unlink(listener->type_specific.socket.addr.addr_un.sun_path)) {
|
|
jbe@0
|
423 moonbr_log(LOG_ERR, "Error while unlinking local socket: %s", strerror(errno));
|
|
jbe@0
|
424 }
|
|
jbe@0
|
425 }
|
|
jbe@0
|
426 }
|
|
jbe@0
|
427 }
|
|
jbe@0
|
428 }
|
|
jbe@0
|
429 }
|
|
jbe@0
|
430 moonbr_log(exitcode ? LOG_ERR : LOG_NOTICE, "Terminating with exit code %i", exitcode);
|
|
jbe@0
|
431 if (moonbr_pidfh && pidfile_remove(moonbr_pidfh)) {
|
|
jbe@0
|
432 moonbr_log(LOG_ERR, "Error while removing PID file: %s", strerror(errno));
|
|
jbe@0
|
433 }
|
|
jbe@0
|
434 exit(exitcode);
|
|
jbe@0
|
435 }
|
|
jbe@0
|
436
|
|
jbe@0
|
437 /* Terminate with either MOONBR_EXITCODE_STARTUPERROR or MOONBR_EXITCODE_RUNTIMEERROR */
|
|
jbe@0
|
438 #define moonbr_terminate_error() \
|
|
jbe@0
|
439 moonbr_terminate( \
|
|
jbe@0
|
440 moonbr_pstate == MOONBR_PSTATE_STARTUP ? \
|
|
jbe@0
|
441 MOONBR_EXITCODE_STARTUPERROR : \
|
|
jbe@0
|
442 MOONBR_EXITCODE_RUNTIMEERROR \
|
|
jbe@0
|
443 )
|
|
jbe@0
|
444
|
|
jbe@0
|
445
|
|
jbe@0
|
446 /*** Helper functions ***/
|
|
jbe@0
|
447
|
|
jbe@0
|
448 /* Fills a 'struct timeval' structure with the current time (using CLOCK_MONOTONIC) */
|
|
jbe@0
|
449 static void moonbr_now(struct timeval *now) {
|
|
jbe@0
|
450 struct timespec ts = {0, };
|
|
jbe@0
|
451 if (clock_gettime(CLOCK_MONOTONIC, &ts)) {
|
|
jbe@0
|
452 moonbr_log(LOG_CRIT, "Error in clock_gettime() call: %s", strerror(errno));
|
|
jbe@0
|
453 moonbr_terminate_error();
|
|
jbe@0
|
454 }
|
|
jbe@0
|
455 *now = (struct timeval){ .tv_sec = ts.tv_sec, .tv_usec = ts.tv_nsec / 1000 };
|
|
jbe@0
|
456 }
|
|
jbe@0
|
457
|
|
jbe@0
|
458 /* Formats a 'struct timeval' value (not thread-safe) */
|
|
jbe@0
|
459 static char *moonbr_format_timeval(struct timeval *t) {
|
|
jbe@0
|
460 static char buf[32];
|
|
jbe@0
|
461 snprintf(buf, 32, "%ji.%06ji seconds", (intmax_t)t->tv_sec, (intmax_t)t->tv_usec);
|
|
jbe@0
|
462 return buf;
|
|
jbe@0
|
463 }
|
|
jbe@0
|
464
|
|
jbe@0
|
465
|
|
jbe@0
|
466 /*** Functions for pool creation and startup ***/
|
|
jbe@0
|
467
|
|
jbe@0
|
468 /* Creates a 'struct moonbr_pool' structure with a given number of listeners */
|
|
jbe@0
|
469 static struct moonbr_pool *moonbr_create_pool(int listener_count) {
|
|
jbe@0
|
470 struct moonbr_pool *pool;
|
|
jbe@0
|
471 pool = calloc(1,
|
|
jbe@0
|
472 sizeof(struct moonbr_pool) + /* size of 'struct moonbr_pool' with one listener */
|
|
jbe@0
|
473 (listener_count-1) * sizeof(struct moonbr_listener) /* size of extra listeners */
|
|
jbe@0
|
474 );
|
|
jbe@0
|
475 if (!pool) {
|
|
jbe@0
|
476 moonbr_log(LOG_CRIT, "Memory allocation error");
|
|
jbe@0
|
477 moonbr_terminate_error();
|
|
jbe@0
|
478 }
|
|
jbe@0
|
479 pool->listener_count = listener_count;
|
|
jbe@0
|
480 {
|
|
jbe@0
|
481 /* initialization of listeners */
|
|
jbe@0
|
482 int i;
|
|
jbe@0
|
483 for (i=0; i<listener_count; i++) {
|
|
jbe@0
|
484 struct moonbr_listener *listener = &pool->listener[i];
|
|
jbe@0
|
485 listener->pool = pool;
|
|
jbe@0
|
486 listener->listenfd = -1;
|
|
jbe@0
|
487 listener->pollidx = -1;
|
|
jbe@0
|
488 }
|
|
jbe@0
|
489 }
|
|
jbe@0
|
490 return pool;
|
|
jbe@0
|
491 }
|
|
jbe@0
|
492
|
|
jbe@0
|
493 /* Destroys a 'struct moonbr_pool' structure before it has been started */
|
|
jbe@0
|
494 static void moonbr_destroy_pool(struct moonbr_pool *pool) {
|
|
jbe@0
|
495 int i;
|
|
jbe@0
|
496 for (i=0; i<pool->listener_count; i++) {
|
|
jbe@0
|
497 struct moonbr_listener *listener = &pool->listener[i];
|
|
jbe@0
|
498 if (
|
|
jbe@0
|
499 listener->proto == MOONBR_PROTO_INTERVAL &&
|
|
jbe@125
|
500 listener->type_specific.interval.name
|
|
jbe@0
|
501 ) {
|
|
jbe@125
|
502 free(listener->type_specific.interval.name);
|
|
jbe@0
|
503 }
|
|
jbe@0
|
504 }
|
|
jbe@0
|
505 free(pool);
|
|
jbe@0
|
506 }
|
|
jbe@0
|
507
|
|
jbe@0
|
508 /* Starts a all listeners in a pool */
|
|
jbe@0
|
509 static int moonbr_start_pool(struct moonbr_pool *pool) {
|
|
jbe@0
|
510 moonbr_log(LOG_INFO, "Creating pool", pool->poolnum);
|
|
jbe@0
|
511 {
|
|
jbe@0
|
512 int i;
|
|
jbe@0
|
513 for (i=0; i<pool->listener_count; i++) {
|
|
jbe@0
|
514 struct moonbr_listener *listener = &pool->listener[i];
|
|
jbe@0
|
515 switch (listener->proto) {
|
|
jbe@0
|
516 case MOONBR_PROTO_INTERVAL:
|
|
jbe@274
|
517 if (listener->type_specific.interval.main) {
|
|
jbe@274
|
518 /* nothing to do here: starting main thread is performed in moonbr_run() function */
|
|
jbe@274
|
519 if (!listener->type_specific.interval.name) {
|
|
jbe@274
|
520 moonbr_log(LOG_INFO, "Adding unnamed main thread");
|
|
jbe@274
|
521 } else {
|
|
jbe@274
|
522 moonbr_log(LOG_INFO, "Adding main thread \"%s\"", listener->type_specific.interval.name);
|
|
jbe@274
|
523 }
|
|
jbe@0
|
524 } else {
|
|
jbe@274
|
525 /* nothing to do here: starting intervals is performed in moonbr_run() function */
|
|
jbe@274
|
526 if (!listener->type_specific.interval.name) {
|
|
jbe@274
|
527 moonbr_log(LOG_INFO, "Adding unnamed interval listener");
|
|
jbe@274
|
528 } else {
|
|
jbe@274
|
529 moonbr_log(LOG_INFO, "Adding interval listener \"%s\"", listener->type_specific.interval.name);
|
|
jbe@274
|
530 }
|
|
jbe@0
|
531 }
|
|
jbe@0
|
532 break;
|
|
jbe@0
|
533 case MOONBR_PROTO_LOCAL:
|
|
jbe@125
|
534 moonbr_log(LOG_INFO, "Adding local socket listener for path \"%s\"", listener->type_specific.socket.addr.addr_un.sun_path);
|
|
jbe@125
|
535 listener->listenfd = socket(PF_LOCAL, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
|
|
jbe@125
|
536 if (listener->listenfd == -1) goto moonbr_start_pool_error;
|
|
jbe@125
|
537 if (!unlink(listener->type_specific.socket.addr.addr_un.sun_path)) {
|
|
jbe@125
|
538 moonbr_log(LOG_WARNING, "Unlinked named socket \"%s\" prior to listening", listener->type_specific.socket.addr.addr_un.sun_path);
|
|
jbe@125
|
539 } else {
|
|
jbe@125
|
540 if (errno != ENOENT) {
|
|
jbe@125
|
541 moonbr_log(LOG_ERR, "Could not unlink named socket \"%s\" prior to listening: %s", listener->type_specific.socket.addr.addr_un.sun_path, strerror(errno));
|
|
jbe@125
|
542 }
|
|
jbe@125
|
543 }
|
|
jbe@125
|
544 if (
|
|
jbe@125
|
545 bind(listener->listenfd, &listener->type_specific.socket.addr.addr_abstract, listener->type_specific.socket.addrlen)
|
|
jbe@125
|
546 ) goto moonbr_start_pool_error;
|
|
jbe@125
|
547 if (listen(listener->listenfd, MOONBR_LISTEN_BACKLOG)) goto moonbr_start_pool_error;
|
|
jbe@125
|
548 break;
|
|
jbe@125
|
549 case MOONBR_PROTO_TCP:
|
|
jbe@125
|
550 moonbr_log(LOG_INFO, "Adding TCP listener on interface \"%s\", port %i", listener->proto_specific.tcp.ip, listener->proto_specific.tcp.port);
|
|
jbe@134
|
551 listener->listenfd = socket(listener->type_specific.socket.addr.addr_abstract.sa_family, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0); /* NOTE: not correctly using PF_* but AF_* constants here */
|
|
jbe@125
|
552 if (listener->listenfd == -1) goto moonbr_start_pool_error;
|
|
jbe@0
|
553 {
|
|
jbe@125
|
554 /* avoid "Address already in use" error when restarting service */
|
|
jbe@125
|
555 static const int reuseval = 1;
|
|
jbe@125
|
556 if (setsockopt(
|
|
jbe@125
|
557 listener->listenfd, SOL_SOCKET, SO_REUSEADDR, &reuseval, sizeof(reuseval)
|
|
jbe@125
|
558 )) goto moonbr_start_pool_error;
|
|
jbe@0
|
559 }
|
|
jbe@0
|
560 {
|
|
jbe@125
|
561 /* default to send TCP RST when process terminates unexpectedly */
|
|
jbe@125
|
562 static const struct linger lingerval = {
|
|
jbe@125
|
563 .l_onoff = 1,
|
|
jbe@125
|
564 .l_linger = 0
|
|
jbe@0
|
565 };
|
|
jbe@125
|
566 if (setsockopt(
|
|
jbe@125
|
567 listener->listenfd, SOL_SOCKET, SO_LINGER, &lingerval, sizeof(lingerval)
|
|
jbe@125
|
568 )) goto moonbr_start_pool_error;
|
|
jbe@0
|
569 }
|
|
jbe@125
|
570 if (
|
|
jbe@125
|
571 bind(listener->listenfd, &listener->type_specific.socket.addr.addr_abstract, listener->type_specific.socket.addrlen)
|
|
jbe@125
|
572 ) goto moonbr_start_pool_error;
|
|
jbe@125
|
573 if (listen(listener->listenfd, MOONBR_LISTEN_BACKLOG)) goto moonbr_start_pool_error;
|
|
jbe@0
|
574 break;
|
|
jbe@0
|
575 default:
|
|
jbe@0
|
576 moonbr_log(LOG_CRIT, "Internal error (should not happen): Unexpected value in listener.proto field");
|
|
jbe@0
|
577 moonbr_terminate_error();
|
|
jbe@0
|
578 }
|
|
jbe@0
|
579 }
|
|
jbe@0
|
580 goto moonbr_start_pool_ok;
|
|
jbe@0
|
581 moonbr_start_pool_error:
|
|
jbe@0
|
582 {
|
|
jbe@0
|
583 int j = i;
|
|
jbe@0
|
584 int errno2 = errno;
|
|
jbe@0
|
585 for (; i>=0; i--) {
|
|
jbe@0
|
586 struct moonbr_listener *listener = &pool->listener[i];
|
|
jbe@0
|
587 if (listener->listenfd != -1) close(listener->listenfd);
|
|
jbe@0
|
588 }
|
|
jbe@0
|
589 errno = errno2;
|
|
jbe@0
|
590 return j;
|
|
jbe@0
|
591 }
|
|
jbe@0
|
592 }
|
|
jbe@0
|
593 moonbr_start_pool_ok:
|
|
jbe@0
|
594 pool->poolnum = ++moonbr_pool_count;
|
|
jbe@0
|
595 moonbr_log(LOG_INFO, "Pool #%i created", pool->poolnum);
|
|
jbe@0
|
596 if (moonbr_last_pool) moonbr_last_pool->next_pool = pool;
|
|
jbe@0
|
597 else moonbr_first_pool = pool;
|
|
jbe@0
|
598 moonbr_last_pool = pool;
|
|
jbe@0
|
599 return -1;
|
|
jbe@0
|
600 }
|
|
jbe@0
|
601
|
|
jbe@0
|
602
|
|
jbe@0
|
603 /*** Function to send data and a file descriptor to child process */
|
|
jbe@0
|
604
|
|
jbe@0
|
605 /* Sends control message of one bye plus optional file descriptor plus optional pointer to child process */
|
|
jbe@0
|
606 static void moonbr_send_control_message(struct moonbr_worker *worker, char status, int fd, void *ptr) {
|
|
jbe@0
|
607 {
|
|
jbe@0
|
608 struct iovec iovector = { .iov_base = &status, .iov_len = 1 }; /* carrying status byte */
|
|
jbe@0
|
609 char control_message_buffer[CMSG_SPACE(sizeof(int))] = {0, }; /* used to transfer file descriptor */
|
|
jbe@0
|
610 struct msghdr message = { .msg_iov = &iovector, .msg_iovlen = 1 }; /* data structure passed to sendmsg() call */
|
|
jbe@0
|
611 if (moonbr_debug) {
|
|
jbe@0
|
612 if (fd == -1) {
|
|
jbe@0
|
613 moonbr_log(LOG_DEBUG, "Sending control message \"%c\" to child process in pool #%i (PID %i)", (int)status, worker->pool->poolnum, (int)worker->pid);
|
|
jbe@0
|
614 } else {
|
|
jbe@0
|
615 moonbr_log(LOG_DEBUG, "Sending control message \"%c\" with file descriptor #%i to child process in pool #%i (PID %i)", (int)status, fd, worker->pool->poolnum, (int)worker->pid);
|
|
jbe@0
|
616 }
|
|
jbe@0
|
617 }
|
|
jbe@0
|
618 if (fd != -1) {
|
|
jbe@0
|
619 /* attach control message with file descriptor */
|
|
jbe@0
|
620 message.msg_control = control_message_buffer;
|
|
jbe@0
|
621 message.msg_controllen = CMSG_SPACE(sizeof(int));
|
|
jbe@0
|
622 {
|
|
jbe@0
|
623 struct cmsghdr *control_message = CMSG_FIRSTHDR(&message);
|
|
jbe@0
|
624 control_message->cmsg_level = SOL_SOCKET;
|
|
jbe@0
|
625 control_message->cmsg_type = SCM_RIGHTS;
|
|
jbe@0
|
626 control_message->cmsg_len = CMSG_LEN(sizeof(int));
|
|
jbe@18
|
627 memcpy(CMSG_DATA(control_message), &fd, sizeof(int));
|
|
jbe@0
|
628 }
|
|
jbe@0
|
629 }
|
|
jbe@0
|
630 while (sendmsg(worker->controlfd, &message, MSG_NOSIGNAL) < 0) {
|
|
jbe@0
|
631 if (errno == EPIPE) {
|
|
jbe@0
|
632 moonbr_log(LOG_ERR, "Error while communicating with idle child process in pool #%i (PID %i): %s", worker->pool->poolnum, (int)worker->pid, strerror(errno));
|
|
jbe@0
|
633 return; /* do not close socket; socket is closed when reading from it */
|
|
jbe@0
|
634 }
|
|
jbe@0
|
635 if (errno != EINTR) {
|
|
jbe@0
|
636 moonbr_log(LOG_CRIT, "Unexpected error while communicating with idle child process in pool #%i (PID %i): %s", worker->pool->poolnum, (int)worker->pid, strerror(errno));
|
|
jbe@0
|
637 moonbr_terminate_error();
|
|
jbe@0
|
638 }
|
|
jbe@0
|
639 }
|
|
jbe@0
|
640 }
|
|
jbe@0
|
641 if (ptr) {
|
|
jbe@0
|
642 char buf[sizeof(void *)];
|
|
jbe@0
|
643 char *pos = buf;
|
|
jbe@0
|
644 int len = sizeof(void *);
|
|
jbe@0
|
645 ssize_t written;
|
|
jbe@0
|
646 if (moonbr_debug) {
|
|
jbe@0
|
647 moonbr_log(LOG_DEBUG, "Sending memory pointer to child process in pool #%i (PID %i)", (int)status, worker->pool->poolnum, (int)worker->pid);
|
|
jbe@0
|
648 }
|
|
jbe@18
|
649 memcpy(buf, &ptr, sizeof(void *));
|
|
jbe@0
|
650 while (len) {
|
|
jbe@0
|
651 written = send(worker->controlfd, pos, len, MSG_NOSIGNAL);
|
|
jbe@0
|
652 if (written > 0) {
|
|
jbe@0
|
653 pos += written;
|
|
jbe@0
|
654 len -= written;
|
|
jbe@0
|
655 } else if (errno == EPIPE) {
|
|
jbe@0
|
656 moonbr_log(LOG_ERR, "Error while communicating with idle child process in pool #%i (PID %i): %s", worker->pool->poolnum, (int)worker->pid, strerror(errno));
|
|
jbe@0
|
657 return; /* do not close socket; socket is closed when reading from it */
|
|
jbe@0
|
658 } else if (errno != EINTR) {
|
|
jbe@0
|
659 moonbr_log(LOG_CRIT, "Unexpected error while communicating with idle child process in pool #%i (PID %i): %s", worker->pool->poolnum, (int)worker->pid, strerror(errno));
|
|
jbe@0
|
660 moonbr_terminate_error();
|
|
jbe@0
|
661 }
|
|
jbe@0
|
662 }
|
|
jbe@0
|
663 }
|
|
jbe@0
|
664 }
|
|
jbe@0
|
665
|
|
jbe@0
|
666
|
|
jbe@0
|
667 /*** Functions running in child process ***/
|
|
jbe@0
|
668
|
|
jbe@0
|
669 /* Logs an error in child process */
|
|
jbe@0
|
670 static void moonbr_child_log(const char *message) {
|
|
jbe@0
|
671 fprintf(stderr, "%s\n", message);
|
|
jbe@0
|
672 }
|
|
jbe@0
|
673
|
|
jbe@0
|
674 /* Logs a fatal error in child process and terminates process with error status */
|
|
jbe@0
|
675 static void moonbr_child_log_fatal(const char *message) {
|
|
jbe@0
|
676 moonbr_child_log(message);
|
|
jbe@0
|
677 exit(1);
|
|
jbe@0
|
678 }
|
|
jbe@0
|
679
|
|
jbe@0
|
680 /* Logs an error in child process while appending error string for global errno variable */
|
|
jbe@0
|
681 static void moonbr_child_log_errno(const char *message) {
|
|
jbe@213
|
682 char errmsg[MOONBR_MAXSTRERRORLEN] = MOONBR_STRERROR_R_MSG;
|
|
jbe@20
|
683 strerror_r(errno, errmsg, MOONBR_MAXSTRERRORLEN); /* use thread-safe call in case child created threads */
|
|
jbe@0
|
684 fprintf(stderr, "%s: %s\n", message, errmsg);
|
|
jbe@0
|
685 }
|
|
jbe@0
|
686
|
|
jbe@0
|
687 /* Logs a fatal error in child process while appending error string for errno and terminating process */
|
|
jbe@0
|
688 static void moonbr_child_log_errno_fatal(const char *message) {
|
|
jbe@0
|
689 moonbr_child_log_errno(message);
|
|
jbe@0
|
690 exit(1);
|
|
jbe@0
|
691 }
|
|
jbe@0
|
692
|
|
jbe@0
|
693 /* Receives a control message consisting of one character plus an optional file descriptor from parent process */
|
|
jbe@0
|
694 static void moonbr_child_receive_control_message(int socketfd, char *status, int *fd) {
|
|
jbe@0
|
695 struct iovec iovector = { .iov_base = status, .iov_len = 1 }; /* reference to status byte variable */
|
|
jbe@0
|
696 char control_message_buffer[CMSG_SPACE(sizeof(int))] = {0, }; /* used to receive file descriptor */
|
|
jbe@0
|
697 struct msghdr message = { /* data structure passed to recvmsg() call */
|
|
jbe@0
|
698 .msg_iov = &iovector,
|
|
jbe@0
|
699 .msg_iovlen = 1,
|
|
jbe@0
|
700 .msg_control = control_message_buffer,
|
|
jbe@0
|
701 .msg_controllen = CMSG_SPACE(sizeof(int))
|
|
jbe@0
|
702 };
|
|
jbe@0
|
703 {
|
|
jbe@0
|
704 int received;
|
|
jbe@0
|
705 while ((received = recvmsg(socketfd, &message, MSG_CMSG_CLOEXEC)) < 0) {
|
|
jbe@0
|
706 if (errno != EINTR) {
|
|
jbe@0
|
707 moonbr_child_log_errno_fatal("Error while trying to receive connection socket from parent process");
|
|
jbe@0
|
708 }
|
|
jbe@0
|
709 }
|
|
jbe@0
|
710 if (!received) {
|
|
jbe@0
|
711 moonbr_child_log_fatal("Unexpected EOF while trying to receive connection socket from parent process");
|
|
jbe@0
|
712 }
|
|
jbe@0
|
713 }
|
|
jbe@0
|
714 {
|
|
jbe@0
|
715 struct cmsghdr *control_message = CMSG_FIRSTHDR(&message);
|
|
jbe@0
|
716 if (control_message) {
|
|
jbe@0
|
717 if (control_message->cmsg_level != SOL_SOCKET) {
|
|
jbe@0
|
718 moonbr_child_log_fatal("Received control message with cmsg_level not equal to SOL_SOCKET");
|
|
jbe@0
|
719 }
|
|
jbe@0
|
720 if (control_message->cmsg_type != SCM_RIGHTS) {
|
|
jbe@0
|
721 moonbr_child_log_fatal("Received control message with cmsg_type not equal to SCM_RIGHTS");
|
|
jbe@0
|
722 }
|
|
jbe@18
|
723 memcpy(fd, CMSG_DATA(control_message), sizeof(int));
|
|
jbe@0
|
724 } else {
|
|
jbe@0
|
725 *fd = -1;
|
|
jbe@0
|
726 }
|
|
jbe@0
|
727 }
|
|
jbe@0
|
728 }
|
|
jbe@0
|
729
|
|
jbe@0
|
730 /* Receives a pointer from parent process */
|
|
jbe@0
|
731 static void *moonbr_child_receive_pointer(int socketfd) {
|
|
jbe@0
|
732 char buf[sizeof(void *)];
|
|
jbe@0
|
733 char *pos = buf;
|
|
jbe@0
|
734 int len = sizeof(void *);
|
|
jbe@0
|
735 ssize_t bytes_read;
|
|
jbe@0
|
736 while (len) {
|
|
jbe@0
|
737 bytes_read = recv(socketfd, pos, len, 0);
|
|
jbe@0
|
738 if (bytes_read > 0) {
|
|
jbe@0
|
739 pos += bytes_read;
|
|
jbe@0
|
740 len -= bytes_read;
|
|
jbe@0
|
741 } else if (!bytes_read) {
|
|
jbe@0
|
742 moonbr_child_log_fatal("Unexpected EOF while trying to receive memory pointer from parent process");
|
|
jbe@0
|
743 } else if (errno != EINTR) {
|
|
jbe@0
|
744 moonbr_child_log_errno_fatal("Error while trying to receive memory pointer from parent process");
|
|
jbe@0
|
745 }
|
|
jbe@0
|
746 }
|
|
jbe@18
|
747 {
|
|
jbe@18
|
748 void *ptr; /* avoid breaking strict-aliasing rules */
|
|
jbe@18
|
749 memcpy(&ptr, buf, sizeof(void *));
|
|
jbe@18
|
750 return ptr;
|
|
jbe@18
|
751 }
|
|
jbe@0
|
752 }
|
|
jbe@0
|
753
|
|
jbe@0
|
754 /* Main function of child process to be called after fork() and file descriptor rearrangement */
|
|
jbe@0
|
755 void moonbr_child_run(struct moonbr_pool *pool, lua_State *L) {
|
|
jbe@0
|
756 char controlmsg;
|
|
jbe@88
|
757 int fd;
|
|
jbe@0
|
758 struct itimerval notimer = { { 0, }, { 0, } };
|
|
jbe@0
|
759 lua_rawgetp(L, LUA_REGISTRYINDEX, moonbr_luakey_prepare_func(pool));
|
|
jbe@0
|
760 if (lua_isnil(L, -1)) lua_pop(L, 1);
|
|
jbe@0
|
761 else if (lua_pcall(L, 0, 0, 1)) {
|
|
jbe@0
|
762 fprintf(stderr, "Error in \"prepare\" function: %s\n", lua_tostring(L, -1));
|
|
jbe@0
|
763 exit(1);
|
|
jbe@0
|
764 }
|
|
jbe@293
|
765 moonbr_io_catch_sigterm(L); // NOTE: should not fail
|
|
jbe@0
|
766 while (1) {
|
|
jbe@0
|
767 struct moonbr_listener *listener;
|
|
jbe@0
|
768 if (setitimer(ITIMER_REAL, ¬imer, NULL)) {
|
|
jbe@0
|
769 moonbr_child_log_errno_fatal("Could not reset ITIMER_REAL via setitimer()");
|
|
jbe@0
|
770 }
|
|
jbe@0
|
771 controlmsg = MOONBR_STATUS_IDLE;
|
|
jbe@0
|
772 if (write(MOONBR_FD_CONTROL, &controlmsg, 1) <= 0) {
|
|
jbe@0
|
773 moonbr_child_log_errno_fatal("Error while sending ready message to parent process");
|
|
jbe@0
|
774 }
|
|
jbe@88
|
775 moonbr_child_receive_control_message(MOONBR_FD_CONTROL, &controlmsg, &fd);
|
|
jbe@0
|
776 if (!(
|
|
jbe@124
|
777 (controlmsg == MOONBR_COMMAND_TERMINATE && fd == -1) ||
|
|
jbe@124
|
778 (controlmsg == MOONBR_COMMAND_CONNECT)
|
|
jbe@0
|
779 )) {
|
|
jbe@0
|
780 moonbr_child_log_fatal("Received illegal control message from parent process");
|
|
jbe@0
|
781 }
|
|
jbe@0
|
782 if (controlmsg == MOONBR_COMMAND_TERMINATE) break;
|
|
jbe@293
|
783 moonbr_io_sigterm_flag = 0; /* ignore any prior SIGTERM (can't be handled in blocking recv anyway) */
|
|
jbe@0
|
784 listener = moonbr_child_receive_pointer(MOONBR_FD_CONTROL);
|
|
jbe@127
|
785 if (
|
|
jbe@127
|
786 listener->proto != MOONBR_PROTO_LOCAL &&
|
|
jbe@127
|
787 listener->proto != MOONBR_PROTO_TCP &&
|
|
jbe@127
|
788 fd >= 0
|
|
jbe@127
|
789 ) {
|
|
jbe@124
|
790 moonbr_child_log_fatal("Received unexpected file descriptor from parent process");
|
|
jbe@127
|
791 } else if (
|
|
jbe@274
|
792 listener->proto != MOONBR_PROTO_INTERVAL && fd < 0
|
|
jbe@127
|
793 ) {
|
|
jbe@124
|
794 moonbr_child_log_fatal("Missing file descriptor from parent process");
|
|
jbe@124
|
795 }
|
|
jbe@119
|
796 if (fd >= 0) moonbr_io_pushhandle(L, fd);
|
|
jbe@0
|
797 lua_rawgetp(L, LUA_REGISTRYINDEX, moonbr_luakey_connect_func(pool));
|
|
jbe@119
|
798 if (fd < 0) {
|
|
jbe@0
|
799 lua_newtable(L);
|
|
jbe@274
|
800 if (listener->proto == MOONBR_PROTO_INTERVAL) {
|
|
jbe@131
|
801 lua_pushstring(L,
|
|
jbe@131
|
802 listener->type_specific.interval.name ?
|
|
jbe@131
|
803 listener->type_specific.interval.name : ""
|
|
jbe@131
|
804 );
|
|
jbe@274
|
805 if (listener->type_specific.interval.main) {
|
|
jbe@274
|
806 lua_setfield(L, -2, "main");
|
|
jbe@274
|
807 } else {
|
|
jbe@274
|
808 lua_setfield(L, -2, "interval");
|
|
jbe@274
|
809 }
|
|
jbe@131
|
810 }
|
|
jbe@0
|
811 } else {
|
|
jbe@88
|
812 lua_pushvalue(L, -2);
|
|
jbe@0
|
813 }
|
|
jbe@0
|
814 if (lua_pcall(L, 1, 1, 1)) {
|
|
jbe@0
|
815 fprintf(stderr, "Error in \"connect\" function: %s\n", lua_tostring(L, -1));
|
|
jbe@0
|
816 exit(1);
|
|
jbe@0
|
817 }
|
|
jbe@119
|
818 if (fd >= 0) moonbr_io_closehandle(L, -2, 0); /* attemt clean close */
|
|
jbe@293
|
819 if (
|
|
jbe@293
|
820 moonbr_io_sigterm_flag ||
|
|
jbe@293
|
821 lua_type(L, -1) != LUA_TBOOLEAN || !lua_toboolean(L, -1)
|
|
jbe@293
|
822 ) break;
|
|
jbe@0
|
823 #ifdef MOONBR_LUA_PANIC_BUG_WORKAROUND
|
|
jbe@0
|
824 lua_settop(L, 2);
|
|
jbe@0
|
825 #else
|
|
jbe@0
|
826 lua_settop(L, 1);
|
|
jbe@0
|
827 #endif
|
|
jbe@0
|
828 }
|
|
jbe@0
|
829 controlmsg = MOONBR_STATUS_GOODBYE;
|
|
jbe@0
|
830 if (write(MOONBR_FD_CONTROL, &controlmsg, 1) <= 0) {
|
|
jbe@0
|
831 moonbr_child_log_errno_fatal("Error while sending goodbye message to parent process");
|
|
jbe@0
|
832 }
|
|
jbe@0
|
833 if (close(MOONBR_FD_CONTROL) && errno != EINTR) {
|
|
jbe@0
|
834 moonbr_child_log_errno("Error while closing control socket");
|
|
jbe@0
|
835 }
|
|
jbe@0
|
836 lua_rawgetp(L, LUA_REGISTRYINDEX, moonbr_luakey_finish_func(pool));
|
|
jbe@0
|
837 if (lua_isnil(L, -1)) lua_pop(L, 1);
|
|
jbe@0
|
838 else if (lua_pcall(L, 0, 0, 1)) {
|
|
jbe@0
|
839 fprintf(stderr, "Error in \"finish\" function: %s\n", lua_tostring(L, -1));
|
|
jbe@0
|
840 exit(1);
|
|
jbe@0
|
841 }
|
|
jbe@0
|
842 lua_close(L);
|
|
jbe@0
|
843 exit(0);
|
|
jbe@0
|
844 }
|
|
jbe@0
|
845
|
|
jbe@0
|
846
|
|
jbe@0
|
847 /*** Functions to spawn child process ***/
|
|
jbe@0
|
848
|
|
jbe@0
|
849 /* Helper function to send an error message to a file descriptor (not needing a file stream) */
|
|
jbe@0
|
850 static void moonbr_child_emergency_print(int fd, char *message) {
|
|
jbe@0
|
851 size_t len = strlen(message);
|
|
jbe@0
|
852 ssize_t written;
|
|
jbe@0
|
853 while (len) {
|
|
jbe@0
|
854 written = write(fd, message, len);
|
|
jbe@0
|
855 if (written > 0) {
|
|
jbe@0
|
856 message += written;
|
|
jbe@0
|
857 len -= written;
|
|
jbe@0
|
858 } else {
|
|
jbe@0
|
859 if (written != -1 || errno != EINTR) break;
|
|
jbe@0
|
860 }
|
|
jbe@0
|
861 }
|
|
jbe@0
|
862 }
|
|
jbe@0
|
863
|
|
jbe@0
|
864 /* Helper function to send an error message plus a text for errno to a file descriptor and terminate the process */
|
|
jbe@0
|
865 static void moonbr_child_emergency_error(int fd, char *message) {
|
|
jbe@0
|
866 int errno2 = errno;
|
|
jbe@0
|
867 moonbr_child_emergency_print(fd, message);
|
|
jbe@0
|
868 moonbr_child_emergency_print(fd, ": ");
|
|
jbe@0
|
869 moonbr_child_emergency_print(fd, strerror(errno2));
|
|
jbe@0
|
870 moonbr_child_emergency_print(fd, "\n");
|
|
jbe@0
|
871 exit(1);
|
|
jbe@0
|
872 }
|
|
jbe@0
|
873
|
|
jbe@0
|
874 /* Creates a child process and (in case of success) registers it in the 'struct moonbr_pool' structure */
|
|
jbe@0
|
875 static int moonbr_create_worker(struct moonbr_pool *pool, lua_State *L) {
|
|
jbe@0
|
876 struct moonbr_worker *worker;
|
|
jbe@0
|
877 worker = calloc(1, sizeof(struct moonbr_worker));
|
|
jbe@0
|
878 if (!worker) {
|
|
jbe@0
|
879 moonbr_log(LOG_CRIT, "Memory allocation error");
|
|
jbe@0
|
880 return -1;
|
|
jbe@0
|
881 }
|
|
jbe@0
|
882 worker->pool = pool;
|
|
jbe@0
|
883 {
|
|
jbe@0
|
884 int controlfds[2];
|
|
jbe@0
|
885 int errorfds[2];
|
|
jbe@0
|
886 if (socketpair(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0, controlfds)) {
|
|
jbe@0
|
887 moonbr_log(LOG_ERR, "Could not create control socket pair for communcation with child process: %s", strerror(errno));
|
|
jbe@0
|
888 free(worker);
|
|
jbe@0
|
889 return -1;
|
|
jbe@0
|
890 }
|
|
jbe@0
|
891 if (socketpair(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0, errorfds)) {
|
|
jbe@0
|
892 moonbr_log(LOG_ERR, "Could not create socket pair to redirect stderr of child process: %s", strerror(errno));
|
|
jbe@0
|
893 close(controlfds[0]);
|
|
jbe@0
|
894 close(controlfds[1]);
|
|
jbe@0
|
895 free(worker);
|
|
jbe@0
|
896 return -1;
|
|
jbe@0
|
897 }
|
|
jbe@0
|
898 if (moonbr_logfile && fflush(moonbr_logfile)) {
|
|
jbe@0
|
899 moonbr_log(LOG_CRIT, "Could not flush log file prior to forking: %s", strerror(errno));
|
|
jbe@0
|
900 moonbr_terminate_error();
|
|
jbe@0
|
901 }
|
|
jbe@0
|
902 worker->pid = fork();
|
|
jbe@0
|
903 if (worker->pid == -1) {
|
|
jbe@0
|
904 moonbr_log(LOG_ERR, "Could not fork: %s", strerror(errno));
|
|
jbe@0
|
905 close(controlfds[0]);
|
|
jbe@0
|
906 close(controlfds[1]);
|
|
jbe@0
|
907 close(errorfds[0]);
|
|
jbe@0
|
908 close(errorfds[1]);
|
|
jbe@0
|
909 free(worker);
|
|
jbe@0
|
910 return -1;
|
|
jbe@0
|
911 } else if (!worker->pid) {
|
|
jbe@0
|
912 moonbr_pstate = MOONBR_PSTATE_FORKED;
|
|
jbe@0
|
913 #ifdef MOONBR_LUA_PANIC_BUG_WORKAROUND
|
|
jbe@0
|
914 lua_pushliteral(L, "Failed to pass error message due to bug in Lua panic handler (hint: not enough memory?)");
|
|
jbe@0
|
915 #endif
|
|
jbe@0
|
916 moonbr_memory_limit = pool->memory_limit;
|
|
jbe@0
|
917 if (moonbr_pidfh && pidfile_close(moonbr_pidfh)) {
|
|
jbe@0
|
918 moonbr_child_emergency_error(errorfds[1], "Could not close PID file in forked child process");
|
|
jbe@0
|
919 }
|
|
jbe@0
|
920 if (moonbr_logfile && moonbr_logfile != stderr && fclose(moonbr_logfile)) {
|
|
jbe@0
|
921 moonbr_child_emergency_error(errorfds[1], "Could not close log file in forked child process");
|
|
jbe@0
|
922 }
|
|
jbe@0
|
923 if (dup2(errorfds[1], MOONBR_FD_STDERR) == -1) {
|
|
jbe@0
|
924 moonbr_child_emergency_error(errorfds[1], "Could not duplicate socket to stderr file descriptor");
|
|
jbe@0
|
925 }
|
|
jbe@0
|
926 if (dup2(controlfds[1], MOONBR_FD_CONTROL) == -1) {
|
|
jbe@0
|
927 moonbr_child_emergency_error(errorfds[1], "Could not duplicate control socket");
|
|
jbe@0
|
928 }
|
|
jbe@0
|
929 closefrom(MOONBR_FD_END);
|
|
jbe@0
|
930 moonbr_child_run(pool, L);
|
|
jbe@0
|
931 }
|
|
jbe@0
|
932 if (moonbr_stat) {
|
|
jbe@0
|
933 moonbr_log(LOG_INFO, "Created new worker in pool #%i with PID %i", worker->pool->poolnum, (int)worker->pid);
|
|
jbe@0
|
934 }
|
|
jbe@0
|
935 worker->controlfd = controlfds[0];
|
|
jbe@0
|
936 worker->errorfd = errorfds[0];
|
|
jbe@0
|
937 if (close(controlfds[1]) && errno != EINTR) {
|
|
jbe@0
|
938 moonbr_log(LOG_CRIT, "Could not close opposite end of control file descriptor after forking");
|
|
jbe@0
|
939 moonbr_terminate_error();
|
|
jbe@0
|
940 }
|
|
jbe@0
|
941 if (close(errorfds[1]) && errno != EINTR) {
|
|
jbe@0
|
942 moonbr_log(LOG_CRIT, "Could not close opposite end of control file descriptor after forking");
|
|
jbe@0
|
943 moonbr_terminate_error();
|
|
jbe@0
|
944 }
|
|
jbe@0
|
945 }
|
|
jbe@0
|
946 worker->prev_worker = pool->last_worker;
|
|
jbe@0
|
947 if (worker->prev_worker) worker->prev_worker->next_worker = worker;
|
|
jbe@0
|
948 else pool->first_worker = worker;
|
|
jbe@0
|
949 pool->last_worker = worker;
|
|
jbe@0
|
950 pool->unassigned_worker_count++;
|
|
jbe@0
|
951 pool->total_worker_count++;
|
|
jbe@0
|
952 pool->worker_count_stat = 1;
|
|
jbe@0
|
953 moonbr_poll_refresh_needed = 1;
|
|
jbe@0
|
954 return 0; /* return zero only in case of success */
|
|
jbe@0
|
955 }
|
|
jbe@0
|
956
|
|
jbe@0
|
957
|
|
jbe@0
|
958 /*** Functions for queues of 'struct moonbr_listener' ***/
|
|
jbe@0
|
959
|
|
jbe@0
|
960 /* Appends a 'struct moonbr_listener' to the queue of idle listeners and registers it for poll() */
|
|
jbe@0
|
961 static void moonbr_add_idle_listener(struct moonbr_listener *listener) {
|
|
jbe@0
|
962 listener->prev_listener = listener->pool->last_idle_listener;
|
|
jbe@0
|
963 if (listener->prev_listener) listener->prev_listener->next_listener = listener;
|
|
jbe@0
|
964 else listener->pool->first_idle_listener = listener;
|
|
jbe@0
|
965 listener->pool->last_idle_listener = listener;
|
|
jbe@0
|
966 if (listener->pollidx != -1) moonbr_poll_fds[listener->pollidx].events |= POLLIN;
|
|
jbe@0
|
967 }
|
|
jbe@0
|
968
|
|
jbe@0
|
969 /* Removes a 'struct moonbr_listener' from the queue of idle listeners and unregisters it from poll() */
|
|
jbe@0
|
970 static void moonbr_remove_idle_listener(struct moonbr_listener *listener) {
|
|
jbe@0
|
971 if (listener->prev_listener) listener->prev_listener->next_listener = listener->next_listener;
|
|
jbe@0
|
972 else listener->pool->first_idle_listener = listener->next_listener;
|
|
jbe@0
|
973 if (listener->next_listener) listener->next_listener->prev_listener = listener->prev_listener;
|
|
jbe@0
|
974 else listener->pool->last_idle_listener = listener->prev_listener;
|
|
jbe@0
|
975 listener->prev_listener = NULL;
|
|
jbe@0
|
976 listener->next_listener = NULL;
|
|
jbe@0
|
977 if (listener->pollidx != -1) moonbr_poll_fds[listener->pollidx].events &= ~POLLIN;
|
|
jbe@0
|
978 }
|
|
jbe@0
|
979
|
|
jbe@0
|
980 /* Adds a listener to the queue of connected listeners (i.e. waiting to have their incoming connection accepted) */
|
|
jbe@0
|
981 static void moonbr_add_connected_listener(struct moonbr_listener *listener) {
|
|
jbe@0
|
982 listener->prev_listener = listener->pool->last_connected_listener;
|
|
jbe@0
|
983 if (listener->prev_listener) listener->prev_listener->next_listener = listener;
|
|
jbe@0
|
984 else listener->pool->first_connected_listener = listener;
|
|
jbe@0
|
985 listener->pool->last_connected_listener = listener;
|
|
jbe@0
|
986 }
|
|
jbe@0
|
987
|
|
jbe@0
|
988 /* Removes and returns the first connected listener in the queue */
|
|
jbe@0
|
989 static struct moonbr_listener *moonbr_pop_connected_listener(struct moonbr_pool *pool) {
|
|
jbe@0
|
990 struct moonbr_listener *listener = pool->first_connected_listener;
|
|
jbe@0
|
991 listener->pool->first_connected_listener = listener->next_listener;
|
|
jbe@0
|
992 if (listener->pool->first_connected_listener) listener->pool->first_connected_listener->prev_listener = NULL;
|
|
jbe@0
|
993 else listener->pool->last_connected_listener = NULL;
|
|
jbe@0
|
994 listener->next_listener = NULL;
|
|
jbe@0
|
995 return listener;
|
|
jbe@0
|
996 }
|
|
jbe@0
|
997
|
|
jbe@0
|
998
|
|
jbe@0
|
999 /*** Functions to handle polling ***/
|
|
jbe@0
|
1000
|
|
jbe@0
|
1001 /* Returns an index to a new initialized entry in moonbr_poll_fds[] */
|
|
jbe@0
|
1002 int moonbr_poll_fds_nextindex() {
|
|
jbe@0
|
1003 if (moonbr_poll_fds_count >= moonbr_poll_fds_bufsize) {
|
|
jbe@0
|
1004 if (moonbr_poll_fds_bufsize) moonbr_poll_fds_bufsize *= 2;
|
|
jbe@0
|
1005 else moonbr_poll_fds_bufsize = 1;
|
|
jbe@0
|
1006 moonbr_poll_fds = realloc(
|
|
jbe@0
|
1007 moonbr_poll_fds, moonbr_poll_fds_bufsize * sizeof(struct pollfd)
|
|
jbe@0
|
1008 );
|
|
jbe@0
|
1009 if (!moonbr_poll_fds) {
|
|
jbe@0
|
1010 moonbr_log(LOG_CRIT, "Memory allocation error");
|
|
jbe@0
|
1011 moonbr_terminate_error();
|
|
jbe@0
|
1012 }
|
|
jbe@0
|
1013 }
|
|
jbe@0
|
1014 moonbr_poll_fds[moonbr_poll_fds_count] = (struct pollfd){0, };
|
|
jbe@0
|
1015 return moonbr_poll_fds_count++;
|
|
jbe@0
|
1016 }
|
|
jbe@0
|
1017
|
|
jbe@0
|
1018 /* Returns an index to a new initialized entry in moonbr_poll_workers[] */
|
|
jbe@0
|
1019 int moonbr_poll_workers_nextindex() {
|
|
jbe@0
|
1020 if (moonbr_poll_worker_count >= moonbr_poll_workers_bufsize) {
|
|
jbe@0
|
1021 if (moonbr_poll_workers_bufsize) moonbr_poll_workers_bufsize *= 2;
|
|
jbe@0
|
1022 else moonbr_poll_workers_bufsize = 1;
|
|
jbe@0
|
1023 moonbr_poll_workers = realloc(
|
|
jbe@0
|
1024 moonbr_poll_workers, moonbr_poll_workers_bufsize * sizeof(struct moonbr_poll_worker)
|
|
jbe@0
|
1025 );
|
|
jbe@0
|
1026 if (!moonbr_poll_workers) {
|
|
jbe@0
|
1027 moonbr_log(LOG_CRIT, "Memory allocation error");
|
|
jbe@0
|
1028 moonbr_terminate_error();
|
|
jbe@0
|
1029 }
|
|
jbe@0
|
1030 }
|
|
jbe@0
|
1031 moonbr_poll_workers[moonbr_poll_worker_count] = (struct moonbr_poll_worker){0, };
|
|
jbe@0
|
1032 return moonbr_poll_worker_count++;
|
|
jbe@0
|
1033 }
|
|
jbe@0
|
1034
|
|
jbe@0
|
1035 /* Queues all listeners as idle, and initializes static part of moonbr_poll_fds[], which is passed to poll() */
|
|
jbe@0
|
1036 static void moonbr_poll_init() {
|
|
jbe@0
|
1037 if (socketpair(
|
|
jbe@0
|
1038 PF_LOCAL,
|
|
jbe@0
|
1039 SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK,
|
|
jbe@0
|
1040 0,
|
|
jbe@0
|
1041 moonbr_poll_signalfds
|
|
jbe@0
|
1042 )) {
|
|
jbe@0
|
1043 moonbr_log(LOG_CRIT, "Could not create socket pair for signal delivery during polling: %s", strerror(errno));
|
|
jbe@0
|
1044 moonbr_terminate_error();
|
|
jbe@0
|
1045 }
|
|
jbe@0
|
1046 {
|
|
jbe@0
|
1047 int j = moonbr_poll_fds_nextindex();
|
|
jbe@0
|
1048 struct pollfd *pollfd = &moonbr_poll_fds[j];
|
|
jbe@0
|
1049 pollfd->fd = moonbr_poll_signalfd_read;
|
|
jbe@0
|
1050 pollfd->events = POLLIN;
|
|
jbe@0
|
1051 }
|
|
jbe@0
|
1052 {
|
|
jbe@0
|
1053 struct moonbr_pool *pool;
|
|
jbe@0
|
1054 for (pool=moonbr_first_pool; pool; pool=pool->next_pool) {
|
|
jbe@0
|
1055 int i;
|
|
jbe@0
|
1056 for (i=0; i<pool->listener_count; i++) {
|
|
jbe@0
|
1057 struct moonbr_listener *listener = &pool->listener[i];
|
|
jbe@0
|
1058 if (listener->listenfd != -1) {
|
|
jbe@0
|
1059 int j = moonbr_poll_fds_nextindex();
|
|
jbe@0
|
1060 listener->pollidx = j;
|
|
jbe@0
|
1061 moonbr_poll_fds[j].fd = listener->listenfd;
|
|
jbe@0
|
1062 }
|
|
jbe@0
|
1063 moonbr_add_idle_listener(listener);
|
|
jbe@0
|
1064 }
|
|
jbe@0
|
1065 }
|
|
jbe@0
|
1066 }
|
|
jbe@0
|
1067 moonbr_poll_fds_static_count = moonbr_poll_fds_count; /* remember size of static part of array */
|
|
jbe@0
|
1068 }
|
|
jbe@0
|
1069
|
|
jbe@0
|
1070 /* Disables polling of all listeners (required for clean shutdown) */
|
|
jbe@0
|
1071 static void moonbr_poll_shutdown() {
|
|
jbe@0
|
1072 int i;
|
|
jbe@0
|
1073 for (i=1; i<moonbr_poll_fds_static_count; i++) {
|
|
jbe@0
|
1074 moonbr_poll_fds[i].fd = -1;
|
|
jbe@0
|
1075 }
|
|
jbe@0
|
1076 }
|
|
jbe@0
|
1077
|
|
jbe@0
|
1078 /* (Re)builds dynamic part of moonbr_poll_fds[] array, and (re)builds moonbr_poll_workers[] array */
|
|
jbe@0
|
1079 static void moonbr_poll_refresh() {
|
|
jbe@0
|
1080 moonbr_poll_refresh_needed = 0;
|
|
jbe@0
|
1081 moonbr_poll_fds_count = moonbr_poll_fds_static_count;
|
|
jbe@0
|
1082 moonbr_poll_worker_count = 0;
|
|
jbe@0
|
1083 {
|
|
jbe@0
|
1084 struct moonbr_pool *pool;
|
|
jbe@0
|
1085 for (pool=moonbr_first_pool; pool; pool=pool->next_pool) {
|
|
jbe@0
|
1086 struct moonbr_worker *worker;
|
|
jbe@0
|
1087 for (worker=pool->first_worker; worker; worker=worker->next_worker) {
|
|
jbe@0
|
1088 if (worker->controlfd != -1) {
|
|
jbe@0
|
1089 int j = moonbr_poll_fds_nextindex();
|
|
jbe@0
|
1090 int k = moonbr_poll_workers_nextindex();
|
|
jbe@0
|
1091 struct pollfd *pollfd = &moonbr_poll_fds[j];
|
|
jbe@0
|
1092 struct moonbr_poll_worker *poll_worker = &moonbr_poll_workers[k];
|
|
jbe@0
|
1093 pollfd->fd = worker->controlfd;
|
|
jbe@0
|
1094 pollfd->events = POLLIN;
|
|
jbe@0
|
1095 poll_worker->channel = MOONBR_POLL_WORKER_CONTROLCHANNEL;
|
|
jbe@0
|
1096 poll_worker->worker = worker;
|
|
jbe@0
|
1097 }
|
|
jbe@0
|
1098 if (worker->errorfd != -1) {
|
|
jbe@0
|
1099 int j = moonbr_poll_fds_nextindex();
|
|
jbe@0
|
1100 int k = moonbr_poll_workers_nextindex();
|
|
jbe@0
|
1101 struct pollfd *pollfd = &moonbr_poll_fds[j];
|
|
jbe@0
|
1102 struct moonbr_poll_worker *poll_worker = &moonbr_poll_workers[k];
|
|
jbe@0
|
1103 pollfd->fd = worker->errorfd;
|
|
jbe@0
|
1104 pollfd->events = POLLIN;
|
|
jbe@0
|
1105 poll_worker->channel = MOONBR_POLL_WORKER_ERRORCHANNEL;
|
|
jbe@0
|
1106 poll_worker->worker = worker;
|
|
jbe@0
|
1107 }
|
|
jbe@0
|
1108 }
|
|
jbe@0
|
1109 }
|
|
jbe@0
|
1110 }
|
|
jbe@0
|
1111 }
|
|
jbe@0
|
1112
|
|
jbe@0
|
1113 /* resets socket and 'revents' field of moonbr_poll_fds[] for signal delivery just before poll() is called */
|
|
jbe@0
|
1114 static void moonbr_poll_reset_signal() {
|
|
jbe@0
|
1115 ssize_t readcount;
|
|
jbe@0
|
1116 char buf[1];
|
|
jbe@0
|
1117 moonbr_poll_fds[0].revents = 0;
|
|
jbe@0
|
1118 while ((readcount = read(moonbr_poll_signalfd_read, buf, 1)) < 0) {
|
|
jbe@0
|
1119 if (errno == EAGAIN) break;
|
|
jbe@0
|
1120 if (errno != EINTR) {
|
|
jbe@0
|
1121 moonbr_log(LOG_CRIT, "Error while reading from signal delivery socket: %s", strerror(errno));
|
|
jbe@0
|
1122 moonbr_terminate_error();
|
|
jbe@0
|
1123 }
|
|
jbe@0
|
1124 }
|
|
jbe@0
|
1125 if (!readcount) {
|
|
jbe@0
|
1126 moonbr_log(LOG_CRIT, "Unexpected EOF when reading from signal delivery socket: %s", strerror(errno));
|
|
jbe@0
|
1127 moonbr_terminate_error();
|
|
jbe@0
|
1128 }
|
|
jbe@0
|
1129 }
|
|
jbe@0
|
1130
|
|
jbe@0
|
1131
|
|
jbe@0
|
1132 /*** Shutdown initiation ***/
|
|
jbe@0
|
1133
|
|
jbe@0
|
1134 /* Sets global variable 'moonbr_shutdown_in_progress', closes listeners, and demands worker termination */
|
|
jbe@0
|
1135 static void moonbr_initiate_shutdown() {
|
|
jbe@0
|
1136 struct moonbr_pool *pool;
|
|
jbe@294
|
1137 int i;
|
|
jbe@294
|
1138 struct moonbr_worker *worker;
|
|
jbe@0
|
1139 if (moonbr_shutdown_in_progress) {
|
|
jbe@0
|
1140 moonbr_log(LOG_NOTICE, "Shutdown already in progress");
|
|
jbe@0
|
1141 return;
|
|
jbe@0
|
1142 }
|
|
jbe@0
|
1143 moonbr_shutdown_in_progress = 1;
|
|
jbe@0
|
1144 moonbr_log(LOG_NOTICE, "Initiate shutdown");
|
|
jbe@0
|
1145 for (pool = moonbr_first_pool; pool; pool = pool->next_pool) {
|
|
jbe@0
|
1146 for (i=0; i<pool->listener_count; i++) {
|
|
jbe@0
|
1147 struct moonbr_listener *listener = &pool->listener[i];
|
|
jbe@0
|
1148 if (listener->listenfd != -1) {
|
|
jbe@0
|
1149 if (close(listener->listenfd) && errno != EINTR) {
|
|
jbe@0
|
1150 moonbr_log(LOG_CRIT, "Could not close listening socket: %s", strerror(errno));
|
|
jbe@0
|
1151 moonbr_terminate_error();
|
|
jbe@0
|
1152 }
|
|
jbe@0
|
1153 }
|
|
jbe@0
|
1154 }
|
|
jbe@291
|
1155 for (worker=pool->first_worker; worker; worker=worker->next_worker) {
|
|
jbe@291
|
1156 if (moonbr_debug) {
|
|
jbe@291
|
1157 moonbr_log(LOG_DEBUG, "Sending SIGTERM to child with PID %i", (int)worker->pid);
|
|
jbe@291
|
1158 }
|
|
jbe@291
|
1159 if (kill(worker->pid, SIGTERM)) {
|
|
jbe@291
|
1160 moonbr_log(LOG_ERR, "Error while terminating child process: %s", strerror(errno));
|
|
jbe@291
|
1161 }
|
|
jbe@195
|
1162 }
|
|
jbe@195
|
1163 }
|
|
jbe@294
|
1164 moonbr_poll_shutdown(); /* avoids loops due to error condition when polling closed listeners */
|
|
jbe@0
|
1165 }
|
|
jbe@0
|
1166
|
|
jbe@0
|
1167
|
|
jbe@128
|
1168 /*** Functions to handle previously created 'struct moonbr_worker' structures ***/
|
|
jbe@128
|
1169
|
|
jbe@128
|
1170 #define moonbr_try_destroy_worker_stat(str, field) \
|
|
jbe@128
|
1171 moonbr_log(LOG_INFO, "Resource usage in pool #%i for PID %i: " str " %li", worker->pool->poolnum, (int)worker->pid, (long)childusage.field);
|
|
jbe@128
|
1172
|
|
jbe@128
|
1173 /* Destroys a worker structure if socket connections have been closed and child process has terminated */
|
|
jbe@128
|
1174 static int moonbr_try_destroy_worker(struct moonbr_worker *worker) {
|
|
jbe@128
|
1175 if (worker->controlfd != -1 || worker->errorfd != -1) return MOONBR_DESTROY_NONE;
|
|
jbe@128
|
1176 {
|
|
jbe@128
|
1177 int childstatus;
|
|
jbe@128
|
1178 struct rusage childusage;
|
|
jbe@128
|
1179 {
|
|
jbe@128
|
1180 pid_t waitedpid;
|
|
jbe@128
|
1181 while (
|
|
jbe@128
|
1182 (waitedpid = wait4(worker->pid, &childstatus, WNOHANG, &childusage)) == -1
|
|
jbe@128
|
1183 ) {
|
|
jbe@128
|
1184 if (errno != EINTR) {
|
|
jbe@128
|
1185 moonbr_log(LOG_CRIT, "Error in wait4() call: %s", strerror(errno));
|
|
jbe@128
|
1186 moonbr_terminate_error();
|
|
jbe@128
|
1187 }
|
|
jbe@128
|
1188 }
|
|
jbe@128
|
1189 if (!waitedpid) return 0; /* return 0 if worker couldn't be destroyed */
|
|
jbe@128
|
1190 if (waitedpid != worker->pid) {
|
|
jbe@128
|
1191 moonbr_log(LOG_CRIT, "Wrong PID returned by wait4() call");
|
|
jbe@128
|
1192 moonbr_terminate_error();
|
|
jbe@128
|
1193 }
|
|
jbe@128
|
1194 }
|
|
jbe@128
|
1195 if (WIFEXITED(childstatus)) {
|
|
jbe@128
|
1196 if (WEXITSTATUS(childstatus) || moonbr_stat) {
|
|
jbe@128
|
1197 moonbr_log(
|
|
jbe@128
|
1198 WEXITSTATUS(childstatus) ? LOG_WARNING : LOG_INFO,
|
|
jbe@128
|
1199 "Child process in pool #%i with PID %i returned with exit code %i", worker->pool->poolnum, (int)worker->pid, WEXITSTATUS(childstatus)
|
|
jbe@128
|
1200 );
|
|
jbe@128
|
1201 }
|
|
jbe@128
|
1202 } else if (WIFSIGNALED(childstatus)) {
|
|
jbe@128
|
1203 if (WCOREDUMP(childstatus)) {
|
|
jbe@128
|
1204 moonbr_log(LOG_ERR, "Child process in pool #%i with PID %i died from signal %i (core dump was created)", worker->pool->poolnum, (int)worker->pid, WTERMSIG(childstatus));
|
|
jbe@128
|
1205 } else if (WTERMSIG(childstatus) == SIGALRM) {
|
|
jbe@128
|
1206 moonbr_log(LOG_WARNING, "Child process in pool #%i with PID %i exited prematurely due to timeout", worker->pool->poolnum, (int)worker->pid);
|
|
jbe@128
|
1207 } else {
|
|
jbe@128
|
1208 moonbr_log(LOG_ERR, "Child process in pool #%i with PID %i died from signal %i", worker->pool->poolnum, (int)worker->pid, WTERMSIG(childstatus));
|
|
jbe@128
|
1209 }
|
|
jbe@128
|
1210 } else {
|
|
jbe@128
|
1211 moonbr_log(LOG_CRIT, "Illegal exit status from child process in pool #%i with PID %i", worker->pool->poolnum, (int)worker->pid);
|
|
jbe@128
|
1212 moonbr_terminate_error();
|
|
jbe@128
|
1213 }
|
|
jbe@128
|
1214 if (moonbr_stat) {
|
|
jbe@128
|
1215 moonbr_log(LOG_INFO, "Resource usage in pool #%i for PID %i: user time %s", worker->pool->poolnum, (int)worker->pid, moonbr_format_timeval(&childusage.ru_utime));
|
|
jbe@128
|
1216 moonbr_log(LOG_INFO, "Resource usage in pool #%i for PID %i: system time %s", worker->pool->poolnum, (int)worker->pid, moonbr_format_timeval(&childusage.ru_stime));
|
|
jbe@128
|
1217 moonbr_try_destroy_worker_stat("max resident set size", ru_maxrss);
|
|
jbe@128
|
1218 moonbr_try_destroy_worker_stat("integral shared memory size", ru_ixrss);
|
|
jbe@128
|
1219 moonbr_try_destroy_worker_stat("integral unshared data", ru_idrss);
|
|
jbe@128
|
1220 moonbr_try_destroy_worker_stat("integral unshared stack", ru_isrss);
|
|
jbe@128
|
1221 moonbr_try_destroy_worker_stat("page replaims", ru_minflt);
|
|
jbe@128
|
1222 moonbr_try_destroy_worker_stat("page faults", ru_majflt);
|
|
jbe@128
|
1223 moonbr_try_destroy_worker_stat("swaps", ru_nswap);
|
|
jbe@128
|
1224 moonbr_try_destroy_worker_stat("block input operations", ru_inblock);
|
|
jbe@128
|
1225 moonbr_try_destroy_worker_stat("block output operations", ru_oublock);
|
|
jbe@128
|
1226 moonbr_try_destroy_worker_stat("messages sent", ru_msgsnd);
|
|
jbe@128
|
1227 moonbr_try_destroy_worker_stat("messages received", ru_msgrcv);
|
|
jbe@128
|
1228 moonbr_try_destroy_worker_stat("signals received", ru_nsignals);
|
|
jbe@128
|
1229 moonbr_try_destroy_worker_stat("voluntary context switches", ru_nvcsw);
|
|
jbe@128
|
1230 moonbr_try_destroy_worker_stat("involuntary context switches", ru_nivcsw);
|
|
jbe@128
|
1231 }
|
|
jbe@128
|
1232 }
|
|
jbe@128
|
1233 {
|
|
jbe@128
|
1234 int retval = (
|
|
jbe@128
|
1235 (worker->idle || worker->assigned) ?
|
|
jbe@128
|
1236 MOONBR_DESTROY_IDLE_OR_ASSIGNED :
|
|
jbe@128
|
1237 MOONBR_DESTROY_PREPARE
|
|
jbe@128
|
1238 );
|
|
jbe@302
|
1239 if (worker->main && !moonbr_shutdown_in_progress) moonbr_initiate_shutdown();
|
|
jbe@128
|
1240 if (worker->prev_worker) worker->prev_worker->next_worker = worker->next_worker;
|
|
jbe@128
|
1241 else worker->pool->first_worker = worker->next_worker;
|
|
jbe@128
|
1242 if (worker->next_worker) worker->next_worker->prev_worker = worker->prev_worker;
|
|
jbe@128
|
1243 else worker->pool->last_worker = worker->prev_worker;
|
|
jbe@128
|
1244 if (worker->idle) {
|
|
jbe@128
|
1245 if (worker->prev_idle_worker) worker->prev_idle_worker->next_idle_worker = worker->next_idle_worker;
|
|
jbe@128
|
1246 else worker->pool->first_idle_worker = worker->next_idle_worker;
|
|
jbe@128
|
1247 if (worker->next_idle_worker) worker->next_idle_worker->prev_idle_worker = worker->prev_idle_worker;
|
|
jbe@128
|
1248 else worker->pool->last_idle_worker = worker->prev_idle_worker;
|
|
jbe@128
|
1249 worker->pool->idle_worker_count--;
|
|
jbe@128
|
1250 }
|
|
jbe@128
|
1251 if (!worker->assigned) worker->pool->unassigned_worker_count--;
|
|
jbe@128
|
1252 worker->pool->total_worker_count--;
|
|
jbe@128
|
1253 worker->pool->worker_count_stat = 1;
|
|
jbe@128
|
1254 if (worker->errorlinebuf) free(worker->errorlinebuf);
|
|
jbe@128
|
1255 free(worker);
|
|
jbe@128
|
1256 return retval;
|
|
jbe@128
|
1257 }
|
|
jbe@128
|
1258 }
|
|
jbe@128
|
1259
|
|
jbe@128
|
1260 /* Marks a worker as idle and stores it in a queue, optionally setting 'idle_expiration' value */
|
|
jbe@128
|
1261 static void moonbr_add_idle_worker(struct moonbr_worker *worker) {
|
|
jbe@128
|
1262 worker->prev_idle_worker = worker->pool->last_idle_worker;
|
|
jbe@128
|
1263 if (worker->prev_idle_worker) worker->prev_idle_worker->next_idle_worker = worker;
|
|
jbe@128
|
1264 else worker->pool->first_idle_worker = worker;
|
|
jbe@128
|
1265 worker->pool->last_idle_worker = worker;
|
|
jbe@128
|
1266 worker->idle = 1;
|
|
jbe@128
|
1267 worker->pool->idle_worker_count++;
|
|
jbe@128
|
1268 if (worker->assigned) {
|
|
jbe@128
|
1269 worker->assigned = 0;
|
|
jbe@128
|
1270 worker->pool->unassigned_worker_count++;
|
|
jbe@128
|
1271 }
|
|
jbe@128
|
1272 worker->pool->worker_count_stat = 1;
|
|
jbe@128
|
1273 if (timerisset(&worker->pool->idle_timeout)) {
|
|
jbe@128
|
1274 struct timeval now;
|
|
jbe@128
|
1275 moonbr_now(&now);
|
|
jbe@128
|
1276 timeradd(&now, &worker->pool->idle_timeout, &worker->idle_expiration);
|
|
jbe@128
|
1277 }
|
|
jbe@128
|
1278 }
|
|
jbe@128
|
1279
|
|
jbe@128
|
1280 /* Pops a worker from the queue of idle workers (idle queue must not be empty) */
|
|
jbe@128
|
1281 static struct moonbr_worker *moonbr_pop_idle_worker(struct moonbr_pool *pool) {
|
|
jbe@128
|
1282 struct moonbr_worker *worker;
|
|
jbe@128
|
1283 worker = pool->first_idle_worker;
|
|
jbe@128
|
1284 pool->first_idle_worker = worker->next_idle_worker;
|
|
jbe@128
|
1285 if (pool->first_idle_worker) pool->first_idle_worker->prev_idle_worker = NULL;
|
|
jbe@128
|
1286 else pool->last_idle_worker = NULL;
|
|
jbe@128
|
1287 worker->next_idle_worker = NULL;
|
|
jbe@128
|
1288 worker->idle = 0;
|
|
jbe@128
|
1289 worker->pool->idle_worker_count--;
|
|
jbe@128
|
1290 worker->assigned = 1;
|
|
jbe@128
|
1291 worker->pool->unassigned_worker_count--;
|
|
jbe@128
|
1292 worker->pool->worker_count_stat = 1;
|
|
jbe@128
|
1293 return worker;
|
|
jbe@128
|
1294 }
|
|
jbe@128
|
1295
|
|
jbe@128
|
1296
|
|
jbe@0
|
1297 /*** Functions to communicate with child processes ***/
|
|
jbe@0
|
1298
|
|
jbe@0
|
1299 /* Tells child process to terminate */
|
|
jbe@0
|
1300 static void moonbr_terminate_idle_worker(struct moonbr_worker *worker) {
|
|
jbe@0
|
1301 moonbr_send_control_message(worker, MOONBR_COMMAND_TERMINATE, -1, NULL);
|
|
jbe@0
|
1302 }
|
|
jbe@0
|
1303
|
|
jbe@0
|
1304 /* Handles status messages from child process */
|
|
jbe@0
|
1305 static void moonbr_read_controlchannel(struct moonbr_worker *worker) {
|
|
jbe@0
|
1306 char controlmsg;
|
|
jbe@0
|
1307 {
|
|
jbe@0
|
1308 ssize_t bytes_read;
|
|
jbe@0
|
1309 while ((bytes_read = read(worker->controlfd, &controlmsg, 1)) <= 0) {
|
|
jbe@0
|
1310 if (bytes_read == 0 || errno == ECONNRESET) {
|
|
jbe@0
|
1311 moonbr_log(LOG_WARNING, "Child process in pool #%i with PID %i unexpectedly closed control socket", worker->pool->poolnum, (int)worker->pid);
|
|
jbe@0
|
1312 if (close(worker->controlfd) && errno != EINTR) {
|
|
jbe@0
|
1313 moonbr_log(LOG_CRIT, "Error while closing control socket to child process in pool #%i with PID %i: %s", worker->pool->poolnum, (int)worker->pid, strerror(errno));
|
|
jbe@0
|
1314 moonbr_terminate_error();
|
|
jbe@0
|
1315 }
|
|
jbe@0
|
1316 worker->controlfd = -1;
|
|
jbe@0
|
1317 moonbr_poll_refresh_needed = 1;
|
|
jbe@0
|
1318 return;
|
|
jbe@0
|
1319 }
|
|
jbe@0
|
1320 if (errno != EINTR) {
|
|
jbe@0
|
1321 moonbr_log(LOG_CRIT, "Unexpected error while reading control socket from child process in pool #%i with PID %i: %s", worker->pool->poolnum, (int)worker->pid, strerror(errno));
|
|
jbe@0
|
1322 moonbr_terminate_error();
|
|
jbe@0
|
1323 }
|
|
jbe@0
|
1324 }
|
|
jbe@0
|
1325 }
|
|
jbe@0
|
1326 if (worker->idle) {
|
|
jbe@0
|
1327 moonbr_log(LOG_CRIT, "Unexpected data from supposedly idle child process in pool #%i with PID %i", worker->pool->poolnum, (int)worker->pid);
|
|
jbe@0
|
1328 moonbr_terminate_error();
|
|
jbe@0
|
1329 }
|
|
jbe@0
|
1330 if (moonbr_debug) {
|
|
jbe@0
|
1331 moonbr_log(LOG_DEBUG, "Received control message from child in pool #%i with PID %i: \"%c\"", worker->pool->poolnum, (int)worker->pid, (int)controlmsg);
|
|
jbe@0
|
1332 }
|
|
jbe@0
|
1333 switch (controlmsg) {
|
|
jbe@0
|
1334 case MOONBR_STATUS_IDLE:
|
|
jbe@0
|
1335 if (moonbr_stat) {
|
|
jbe@0
|
1336 moonbr_log(LOG_INFO, "Child process in pool #%i with PID %i reports as idle", worker->pool->poolnum, (int)worker->pid);
|
|
jbe@0
|
1337 }
|
|
jbe@0
|
1338 moonbr_add_idle_worker(worker);
|
|
jbe@0
|
1339 break;
|
|
jbe@0
|
1340 case MOONBR_STATUS_GOODBYE:
|
|
jbe@0
|
1341 if (moonbr_stat) {
|
|
jbe@0
|
1342 moonbr_log(LOG_INFO, "Child process in pool #%i with PID %i announced termination", worker->pool->poolnum, (int)worker->pid);
|
|
jbe@0
|
1343 }
|
|
jbe@0
|
1344 if (close(worker->controlfd) && errno != EINTR) {
|
|
jbe@0
|
1345 moonbr_log(LOG_CRIT, "Error while closing control socket to child process in pool #%i with PID %i: %s", worker->pool->poolnum, (int)worker->pid, strerror(errno));
|
|
jbe@0
|
1346 moonbr_terminate_error();
|
|
jbe@0
|
1347 }
|
|
jbe@0
|
1348 worker->controlfd = -1;
|
|
jbe@0
|
1349 moonbr_poll_refresh_needed = 1;
|
|
jbe@0
|
1350 break;
|
|
jbe@0
|
1351 default:
|
|
jbe@0
|
1352 moonbr_log(LOG_CRIT, "Received illegal data (\"%c\") while reading control socket from child process in pool #%i with PID %i", (int)controlmsg, worker->pool->poolnum, (int)worker->pid);
|
|
jbe@0
|
1353 moonbr_terminate_error();
|
|
jbe@0
|
1354 }
|
|
jbe@0
|
1355 }
|
|
jbe@0
|
1356
|
|
jbe@0
|
1357 /* Handles stderr stream from child process */
|
|
jbe@0
|
1358 static void moonbr_read_errorchannel(struct moonbr_worker *worker) {
|
|
jbe@0
|
1359 char staticbuf[MOONBR_MAXERRORLINELEN+1];
|
|
jbe@0
|
1360 char *buf = worker->errorlinebuf;
|
|
jbe@0
|
1361 if (!buf) buf = staticbuf;
|
|
jbe@0
|
1362 {
|
|
jbe@0
|
1363 ssize_t bytes_read;
|
|
jbe@0
|
1364 while (
|
|
jbe@0
|
1365 (bytes_read = read(
|
|
jbe@0
|
1366 worker->errorfd,
|
|
jbe@0
|
1367 buf + worker->errorlinelen,
|
|
jbe@0
|
1368 MOONBR_MAXERRORLINELEN+1 - worker->errorlinelen
|
|
jbe@0
|
1369 )) <= 0
|
|
jbe@0
|
1370 ) {
|
|
jbe@0
|
1371 if (bytes_read == 0 || errno == ECONNRESET) {
|
|
jbe@0
|
1372 if (moonbr_debug) {
|
|
jbe@0
|
1373 moonbr_log(LOG_DEBUG, "Child process in pool #%i with PID %i closed stderr socket", worker->pool->poolnum, (int)worker->pid);
|
|
jbe@0
|
1374 }
|
|
jbe@0
|
1375 if (close(worker->errorfd) && errno != EINTR) {
|
|
jbe@0
|
1376 moonbr_log(LOG_CRIT, "Error while closing stderr socket to child process in pool #%i with PID %i: %s", worker->pool->poolnum, (int)worker->pid, strerror(errno));
|
|
jbe@0
|
1377 moonbr_terminate_error();
|
|
jbe@0
|
1378 }
|
|
jbe@0
|
1379 worker->errorfd = -1;
|
|
jbe@0
|
1380 moonbr_poll_refresh_needed = 1;
|
|
jbe@0
|
1381 break;
|
|
jbe@0
|
1382 }
|
|
jbe@0
|
1383 if (errno != EINTR) {
|
|
jbe@0
|
1384 moonbr_log(LOG_CRIT, "Unexpected error while reading stderr from child process in pool #%i with PID %i: %s", worker->pool->poolnum, (int)worker->pid, strerror(errno));
|
|
jbe@0
|
1385 moonbr_terminate_error();
|
|
jbe@0
|
1386 }
|
|
jbe@0
|
1387 }
|
|
jbe@0
|
1388 worker->errorlinelen += bytes_read;
|
|
jbe@0
|
1389 }
|
|
jbe@0
|
1390 {
|
|
jbe@0
|
1391 int i;
|
|
jbe@0
|
1392 for (i=0; i<worker->errorlinelen; i++) {
|
|
jbe@0
|
1393 if (buf[i] == '\n') buf[i] = 0;
|
|
jbe@0
|
1394 if (!buf[i]) {
|
|
jbe@0
|
1395 if (worker->errorlineovf) {
|
|
jbe@0
|
1396 worker->errorlineovf = 0;
|
|
jbe@0
|
1397 } else {
|
|
jbe@283
|
1398 moonbr_log(LOG_WARNING, "[Pool #%i, PID %i] %s", worker->pool->poolnum, (int)worker->pid, buf);
|
|
jbe@0
|
1399 }
|
|
jbe@0
|
1400 worker->errorlinelen -= i+1;
|
|
jbe@0
|
1401 memmove(buf, buf+i+1, worker->errorlinelen);
|
|
jbe@0
|
1402 i = -1;
|
|
jbe@0
|
1403 }
|
|
jbe@0
|
1404 }
|
|
jbe@0
|
1405 if (i > MOONBR_MAXERRORLINELEN) {
|
|
jbe@0
|
1406 buf[MOONBR_MAXERRORLINELEN] = 0;
|
|
jbe@0
|
1407 if (!worker->errorlineovf) {
|
|
jbe@283
|
1408 moonbr_log(LOG_WARNING, "[Pool #%i, PID %i](line has been truncated) %s", worker->pool->poolnum, (int)worker->pid, buf);
|
|
jbe@0
|
1409 }
|
|
jbe@0
|
1410 worker->errorlinelen = 0;
|
|
jbe@0
|
1411 worker->errorlineovf = 1;
|
|
jbe@0
|
1412 }
|
|
jbe@0
|
1413 }
|
|
jbe@0
|
1414 if (!worker->errorlinebuf && worker->errorlinelen) { /* allocate buffer on heap only if necessary */
|
|
jbe@0
|
1415 worker->errorlinebuf = malloc((MOONBR_MAXERRORLINELEN+1) * sizeof(char));
|
|
jbe@0
|
1416 if (!worker->errorlinebuf) {
|
|
jbe@0
|
1417 moonbr_log(LOG_CRIT, "Memory allocation error");
|
|
jbe@0
|
1418 moonbr_terminate_error();
|
|
jbe@0
|
1419 }
|
|
jbe@0
|
1420 memcpy(worker->errorlinebuf, staticbuf, worker->errorlinelen);
|
|
jbe@0
|
1421 }
|
|
jbe@0
|
1422 }
|
|
jbe@0
|
1423
|
|
jbe@0
|
1424
|
|
jbe@0
|
1425 /*** Handler for incoming connections ***/
|
|
jbe@0
|
1426
|
|
jbe@0
|
1427 /* Accepts one or more incoming connections on listener socket and passes it to worker(s) popped from idle queue */
|
|
jbe@0
|
1428 static void moonbr_connect(struct moonbr_pool *pool) {
|
|
jbe@0
|
1429 struct moonbr_listener *listener = moonbr_pop_connected_listener(pool);
|
|
jbe@0
|
1430 struct moonbr_worker *worker;
|
|
jbe@274
|
1431 if (listener->proto == MOONBR_PROTO_INTERVAL) {
|
|
jbe@127
|
1432 worker = moonbr_pop_idle_worker(pool);
|
|
jbe@274
|
1433 if (listener->type_specific.interval.main) {
|
|
jbe@274
|
1434 if (moonbr_stat) {
|
|
jbe@274
|
1435 moonbr_log(LOG_INFO, "Dispatching main thread \"%s\" of pool #%i to PID %i", listener->type_specific.interval.name, listener->pool->poolnum, (int)worker->pid);
|
|
jbe@274
|
1436 }
|
|
jbe@274
|
1437 worker->main = 1;
|
|
jbe@274
|
1438 } else {
|
|
jbe@274
|
1439 if (moonbr_stat) {
|
|
jbe@274
|
1440 moonbr_log(LOG_INFO, "Dispatching interval timer \"%s\" of pool #%i to PID %i", listener->type_specific.interval.name, listener->pool->poolnum, (int)worker->pid);
|
|
jbe@274
|
1441 }
|
|
jbe@274
|
1442 worker->restart_interval_listener = listener;
|
|
jbe@127
|
1443 }
|
|
jbe@127
|
1444 moonbr_send_control_message(worker, MOONBR_COMMAND_CONNECT, -1, listener);
|
|
jbe@274
|
1445 /* do not push listener to queue of idle listeners (yet) */
|
|
jbe@125
|
1446 } else {
|
|
jbe@125
|
1447 int peerfd;
|
|
jbe@0
|
1448 do {
|
|
jbe@214
|
1449 #if defined(__linux__) && !defined(_GNU_SOURCE)
|
|
jbe@212
|
1450 peerfd = accept(listener->listenfd, NULL, NULL);
|
|
jbe@212
|
1451 if (peerfd != -1) {
|
|
jbe@212
|
1452 if (fcntl(peerfd, F_SETFD, FD_CLOEXEC) == -1) {
|
|
jbe@212
|
1453 moonbr_log(LOG_ERR, "Error in fcntl() call: %s", strerror(errno));
|
|
jbe@212
|
1454 moonbr_terminate_error();
|
|
jbe@212
|
1455 }
|
|
jbe@212
|
1456 }
|
|
jbe@214
|
1457 #else
|
|
jbe@214
|
1458 peerfd = accept4(listener->listenfd, NULL, NULL, SOCK_CLOEXEC);
|
|
jbe@214
|
1459 #endif
|
|
jbe@0
|
1460 if (peerfd == -1) {
|
|
jbe@0
|
1461 if (errno == EWOULDBLOCK) {
|
|
jbe@0
|
1462 break;
|
|
jbe@0
|
1463 } else if (errno == ECONNABORTED) {
|
|
jbe@125
|
1464 moonbr_log(LOG_WARNING, "Connection aborted before accepting it");
|
|
jbe@0
|
1465 break;
|
|
jbe@0
|
1466 } else if (errno != EINTR) {
|
|
jbe@0
|
1467 moonbr_log(LOG_ERR, "Could not accept socket connection: %s", strerror(errno));
|
|
jbe@0
|
1468 moonbr_terminate_error();
|
|
jbe@0
|
1469 }
|
|
jbe@0
|
1470 } else {
|
|
jbe@0
|
1471 worker = moonbr_pop_idle_worker(pool);
|
|
jbe@0
|
1472 if (moonbr_stat) {
|
|
jbe@125
|
1473 moonbr_log(LOG_INFO, "Dispatching connection for pool #%i to PID %i", listener->pool->poolnum, (int)worker->pid);
|
|
jbe@0
|
1474 }
|
|
jbe@124
|
1475 moonbr_send_control_message(worker, MOONBR_COMMAND_CONNECT, peerfd, listener);
|
|
jbe@0
|
1476 if (close(peerfd) && errno != EINTR) {
|
|
jbe@0
|
1477 moonbr_log(LOG_ERR, "Could not close incoming socket connection in parent process: %s", strerror(errno));
|
|
jbe@0
|
1478 moonbr_terminate_error();
|
|
jbe@0
|
1479 }
|
|
jbe@0
|
1480 }
|
|
jbe@0
|
1481 } while (pool->first_idle_worker);
|
|
jbe@0
|
1482 moonbr_add_idle_listener(listener);
|
|
jbe@0
|
1483 }
|
|
jbe@0
|
1484 }
|
|
jbe@0
|
1485
|
|
jbe@0
|
1486
|
|
jbe@0
|
1487 /*** Functions to initialize and restart interval timers ***/
|
|
jbe@0
|
1488
|
|
jbe@0
|
1489 /* Initializes all interval timers */
|
|
jbe@0
|
1490 static void moonbr_interval_initialize() {
|
|
jbe@0
|
1491 struct timeval now;
|
|
jbe@0
|
1492 struct moonbr_pool *pool;
|
|
jbe@0
|
1493 moonbr_now(&now);
|
|
jbe@0
|
1494 for (pool=moonbr_first_pool; pool; pool=pool->next_pool) {
|
|
jbe@0
|
1495 int i;
|
|
jbe@0
|
1496 for (i=0; i<pool->listener_count; i++) {
|
|
jbe@0
|
1497 struct moonbr_listener *listener = &pool->listener[i];
|
|
jbe@0
|
1498 if (listener->proto == MOONBR_PROTO_INTERVAL) {
|
|
jbe@0
|
1499 timeradd(
|
|
jbe@0
|
1500 &now,
|
|
jbe@125
|
1501 &listener->type_specific.interval.delay,
|
|
jbe@125
|
1502 &listener->type_specific.interval.wakeup
|
|
jbe@0
|
1503 );
|
|
jbe@0
|
1504 }
|
|
jbe@0
|
1505 }
|
|
jbe@0
|
1506 }
|
|
jbe@0
|
1507 }
|
|
jbe@0
|
1508
|
|
jbe@0
|
1509 /* If necessary, restarts interval timers and queues interval listener as idle after a worker changed status */
|
|
jbe@0
|
1510 static void moonbr_interval_restart(
|
|
jbe@0
|
1511 struct moonbr_worker *worker,
|
|
jbe@0
|
1512 struct timeval *now /* passed to synchronize with moonbr_run() function */
|
|
jbe@0
|
1513 ) {
|
|
jbe@0
|
1514 struct moonbr_listener *listener = worker->restart_interval_listener;
|
|
jbe@0
|
1515 if (listener) {
|
|
jbe@0
|
1516 moonbr_add_idle_listener(listener);
|
|
jbe@0
|
1517 worker->restart_interval_listener = NULL;
|
|
jbe@125
|
1518 if (listener->type_specific.interval.strict) {
|
|
jbe@0
|
1519 timeradd(
|
|
jbe@125
|
1520 &listener->type_specific.interval.wakeup,
|
|
jbe@125
|
1521 &listener->type_specific.interval.delay,
|
|
jbe@125
|
1522 &listener->type_specific.interval.wakeup
|
|
jbe@0
|
1523 );
|
|
jbe@125
|
1524 if (timercmp(&listener->type_specific.interval.wakeup, now, <)) {
|
|
jbe@125
|
1525 listener->type_specific.interval.wakeup = *now;
|
|
jbe@0
|
1526 }
|
|
jbe@0
|
1527 } else {
|
|
jbe@0
|
1528 timeradd(
|
|
jbe@0
|
1529 now,
|
|
jbe@125
|
1530 &listener->type_specific.interval.delay,
|
|
jbe@125
|
1531 &listener->type_specific.interval.wakeup
|
|
jbe@0
|
1532 );
|
|
jbe@0
|
1533 }
|
|
jbe@0
|
1534 }
|
|
jbe@0
|
1535 }
|
|
jbe@0
|
1536
|
|
jbe@0
|
1537
|
|
jbe@0
|
1538 /*** Main loop and helper functions ***/
|
|
jbe@0
|
1539
|
|
jbe@0
|
1540 /* Stores the earliest required wakeup time in 'wait' variable */
|
|
jbe@0
|
1541 static void moonbr_calc_wait(struct timeval *wait, struct timeval *wakeup) {
|
|
jbe@0
|
1542 if (!timerisset(wait) || timercmp(wakeup, wait, <)) *wait = *wakeup;
|
|
jbe@0
|
1543 }
|
|
jbe@0
|
1544
|
|
jbe@0
|
1545 /* Main loop of Moonbridge system (including initialization of signal handlers and polling structures) */
|
|
jbe@0
|
1546 static void moonbr_run(lua_State *L) {
|
|
jbe@0
|
1547 struct timeval now;
|
|
jbe@0
|
1548 struct moonbr_pool *pool;
|
|
jbe@0
|
1549 struct moonbr_worker *worker;
|
|
jbe@0
|
1550 struct moonbr_worker *next_worker; /* needed when worker is removed during iteration of workers */
|
|
jbe@0
|
1551 struct moonbr_listener *listener;
|
|
jbe@0
|
1552 struct moonbr_listener *next_listener; /* needed when listener is removed during iteration of listeners */
|
|
jbe@0
|
1553 int i;
|
|
jbe@0
|
1554 moonbr_poll_init(); /* must be executed before moonbr_signal_init() */
|
|
jbe@0
|
1555 moonbr_signal_init();
|
|
jbe@0
|
1556 moonbr_interval_initialize();
|
|
jbe@0
|
1557 moonbr_pstate = MOONBR_PSTATE_RUNNING;
|
|
jbe@0
|
1558 while (1) {
|
|
jbe@0
|
1559 struct timeval wait = {0, }; /* point in time when premature wakeup of poll() is required */
|
|
jbe@0
|
1560 if (moonbr_cond_interrupt) {
|
|
jbe@0
|
1561 moonbr_log(LOG_WARNING, "Fast shutdown requested");
|
|
jbe@0
|
1562 moonbr_terminate(MOONBR_EXITCODE_GRACEFUL);
|
|
jbe@0
|
1563 }
|
|
jbe@276
|
1564 if (moonbr_cond_terminate) {
|
|
jbe@276
|
1565 moonbr_initiate_shutdown();
|
|
jbe@276
|
1566 moonbr_cond_terminate = 0;
|
|
jbe@276
|
1567 }
|
|
jbe@0
|
1568 moonbr_cond_child = 0; /* must not be reset between moonbr_try_destroy_worker() and poll() */
|
|
jbe@0
|
1569 moonbr_now(&now);
|
|
jbe@0
|
1570 for (pool=moonbr_first_pool; pool; pool=pool->next_pool) {
|
|
jbe@0
|
1571 int terminated_worker_count = 0; /* allows shortcut for new worker creation */
|
|
jbe@0
|
1572 /* terminate idle workers when expired */
|
|
jbe@0
|
1573 if (timerisset(&pool->idle_timeout)) {
|
|
jbe@0
|
1574 while ((worker = pool->first_idle_worker) != NULL) {
|
|
jbe@0
|
1575 if (timercmp(&worker->idle_expiration, &now, >)) break;
|
|
jbe@0
|
1576 moonbr_pop_idle_worker(pool);
|
|
jbe@0
|
1577 moonbr_terminate_idle_worker(worker);
|
|
jbe@0
|
1578 }
|
|
jbe@0
|
1579 }
|
|
jbe@0
|
1580 /* mark listeners as connected when incoming connection is pending */
|
|
jbe@0
|
1581 for (listener=pool->first_idle_listener; listener; listener=next_listener) {
|
|
jbe@0
|
1582 next_listener = listener->next_listener; /* extra variable necessary due to changing list */
|
|
jbe@0
|
1583 if (listener->pollidx != -1) {
|
|
jbe@0
|
1584 if (moonbr_poll_fds[listener->pollidx].revents) {
|
|
jbe@0
|
1585 moonbr_poll_fds[listener->pollidx].revents = 0;
|
|
jbe@0
|
1586 moonbr_remove_idle_listener(listener);
|
|
jbe@0
|
1587 moonbr_add_connected_listener(listener);
|
|
jbe@0
|
1588 }
|
|
jbe@127
|
1589 } else if (
|
|
jbe@127
|
1590 listener->proto != MOONBR_PROTO_INTERVAL ||
|
|
jbe@127
|
1591 !timercmp(&listener->type_specific.interval.wakeup, &now, >)
|
|
jbe@127
|
1592 ) {
|
|
jbe@127
|
1593 moonbr_remove_idle_listener(listener);
|
|
jbe@127
|
1594 moonbr_add_connected_listener(listener);
|
|
jbe@0
|
1595 }
|
|
jbe@0
|
1596 }
|
|
jbe@0
|
1597 /* process input from child processes */
|
|
jbe@0
|
1598 for (i=0; i<moonbr_poll_worker_count; i++) {
|
|
jbe@0
|
1599 if (moonbr_poll_worker_fds[i].revents) {
|
|
jbe@0
|
1600 moonbr_poll_worker_fds[i].revents = 0;
|
|
jbe@0
|
1601 struct moonbr_poll_worker *poll_worker = &moonbr_poll_workers[i];
|
|
jbe@0
|
1602 switch (poll_worker->channel) {
|
|
jbe@0
|
1603 case MOONBR_POLL_WORKER_CONTROLCHANNEL:
|
|
jbe@0
|
1604 moonbr_read_controlchannel(poll_worker->worker);
|
|
jbe@0
|
1605 moonbr_interval_restart(poll_worker->worker, &now);
|
|
jbe@0
|
1606 break;
|
|
jbe@0
|
1607 case MOONBR_POLL_WORKER_ERRORCHANNEL:
|
|
jbe@0
|
1608 moonbr_read_errorchannel(poll_worker->worker);
|
|
jbe@0
|
1609 break;
|
|
jbe@0
|
1610 }
|
|
jbe@0
|
1611 }
|
|
jbe@0
|
1612 }
|
|
jbe@0
|
1613 /* collect dead child processes */
|
|
jbe@0
|
1614 for (worker=pool->first_worker; worker; worker=next_worker) {
|
|
jbe@0
|
1615 next_worker = worker->next_worker; /* extra variable necessary due to changing list */
|
|
jbe@0
|
1616 switch (moonbr_try_destroy_worker(worker)) {
|
|
jbe@0
|
1617 case MOONBR_DESTROY_PREPARE:
|
|
jbe@0
|
1618 pool->use_fork_error_wakeup = 1;
|
|
jbe@0
|
1619 break;
|
|
jbe@0
|
1620 case MOONBR_DESTROY_IDLE_OR_ASSIGNED:
|
|
jbe@0
|
1621 terminated_worker_count++;
|
|
jbe@0
|
1622 break;
|
|
jbe@0
|
1623 }
|
|
jbe@0
|
1624 }
|
|
jbe@0
|
1625 if (!moonbr_shutdown_in_progress) {
|
|
jbe@130
|
1626 /* connect listeners with idle workers */
|
|
jbe@0
|
1627 while (pool->first_connected_listener && pool->first_idle_worker) {
|
|
jbe@0
|
1628 moonbr_connect(pool);
|
|
jbe@0
|
1629 }
|
|
jbe@130
|
1630 /* create new worker processes */
|
|
jbe@130
|
1631 while (
|
|
jbe@130
|
1632 pool->total_worker_count < pool->max_fork && (
|
|
jbe@130
|
1633 pool->unassigned_worker_count < pool->pre_fork ||
|
|
jbe@130
|
1634 pool->total_worker_count < pool->min_fork
|
|
jbe@130
|
1635 )
|
|
jbe@130
|
1636 ) {
|
|
jbe@130
|
1637 if (pool->use_fork_error_wakeup) {
|
|
jbe@130
|
1638 if (timercmp(&pool->fork_error_wakeup, &now, >)) {
|
|
jbe@130
|
1639 moonbr_calc_wait(&wait, &pool->fork_error_wakeup);
|
|
jbe@130
|
1640 break;
|
|
jbe@130
|
1641 }
|
|
jbe@130
|
1642 } else {
|
|
jbe@130
|
1643 if (terminated_worker_count) {
|
|
jbe@130
|
1644 terminated_worker_count--;
|
|
jbe@130
|
1645 } else if (timercmp(&pool->fork_wakeup, &now, >)) {
|
|
jbe@130
|
1646 moonbr_calc_wait(&wait, &pool->fork_wakeup);
|
|
jbe@130
|
1647 break;
|
|
jbe@130
|
1648 }
|
|
jbe@0
|
1649 }
|
|
jbe@130
|
1650 if (moonbr_create_worker(pool, L)) {
|
|
jbe@130
|
1651 /* on error, enforce error delay */
|
|
jbe@130
|
1652 timeradd(&now, &pool->fork_error_delay, &pool->fork_error_wakeup);
|
|
jbe@130
|
1653 pool->use_fork_error_wakeup = 1;
|
|
jbe@130
|
1654 moonbr_calc_wait(&wait, &pool->fork_error_wakeup);
|
|
jbe@130
|
1655 break;
|
|
jbe@130
|
1656 } else {
|
|
jbe@130
|
1657 /* normal fork delay on success */
|
|
jbe@130
|
1658 timeradd(&now, &pool->fork_delay, &pool->fork_wakeup);
|
|
jbe@130
|
1659 timeradd(&now, &pool->fork_error_delay, &pool->fork_error_wakeup);
|
|
jbe@130
|
1660 pool->use_fork_error_wakeup = 0; /* gets set later if error occures during preparation */
|
|
jbe@130
|
1661 }
|
|
jbe@130
|
1662 }
|
|
jbe@130
|
1663 /* terminate excessive worker processes */
|
|
jbe@130
|
1664 while (
|
|
jbe@130
|
1665 pool->total_worker_count > pool->min_fork &&
|
|
jbe@130
|
1666 pool->idle_worker_count > pool->pre_fork
|
|
jbe@130
|
1667 ) {
|
|
jbe@130
|
1668 if (timerisset(&pool->exit_wakeup)) {
|
|
jbe@130
|
1669 if (timercmp(&pool->exit_wakeup, &now, >)) {
|
|
jbe@130
|
1670 moonbr_calc_wait(&wait, &pool->exit_wakeup);
|
|
jbe@130
|
1671 break;
|
|
jbe@130
|
1672 }
|
|
jbe@130
|
1673 moonbr_terminate_idle_worker(moonbr_pop_idle_worker(pool));
|
|
jbe@130
|
1674 timeradd(&now, &pool->exit_delay, &pool->exit_wakeup);
|
|
jbe@130
|
1675 } else {
|
|
jbe@130
|
1676 timeradd(&now, &pool->exit_delay, &pool->exit_wakeup);
|
|
jbe@0
|
1677 break;
|
|
jbe@0
|
1678 }
|
|
jbe@0
|
1679 }
|
|
jbe@130
|
1680 if (!(
|
|
jbe@130
|
1681 pool->total_worker_count > pool->min_fork &&
|
|
jbe@130
|
1682 pool->idle_worker_count > pool->pre_fork
|
|
jbe@130
|
1683 )) {
|
|
jbe@130
|
1684 timerclear(&pool->exit_wakeup); /* timer gets restarted later when there are excessive workers */
|
|
jbe@0
|
1685 }
|
|
jbe@0
|
1686 }
|
|
jbe@0
|
1687 /* optionally output worker count stats */
|
|
jbe@0
|
1688 if (moonbr_stat && pool->worker_count_stat) {
|
|
jbe@0
|
1689 pool->worker_count_stat = 0;
|
|
jbe@0
|
1690 moonbr_log(
|
|
jbe@0
|
1691 LOG_INFO,
|
|
jbe@0
|
1692 "Worker count for pool #%i: %i idle, %i assigned, %i total",
|
|
jbe@0
|
1693 pool->poolnum, pool->idle_worker_count,
|
|
jbe@0
|
1694 pool->total_worker_count - pool->unassigned_worker_count,
|
|
jbe@0
|
1695 pool->total_worker_count);
|
|
jbe@0
|
1696 }
|
|
jbe@0
|
1697 /* calculate wakeup time for interval listeners */
|
|
jbe@0
|
1698 for (listener=pool->first_idle_listener; listener; listener=listener->next_listener) {
|
|
jbe@0
|
1699 if (listener->proto == MOONBR_PROTO_INTERVAL) {
|
|
jbe@125
|
1700 moonbr_calc_wait(&wait, &listener->type_specific.interval.wakeup);
|
|
jbe@0
|
1701 }
|
|
jbe@0
|
1702 }
|
|
jbe@0
|
1703 /* calculate wakeup time for idle workers (only first idle worker is significant) */
|
|
jbe@0
|
1704 if (timerisset(&pool->idle_timeout) && pool->first_idle_worker) {
|
|
jbe@0
|
1705 moonbr_calc_wait(&wait, &pool->first_idle_worker->idle_expiration);
|
|
jbe@0
|
1706 }
|
|
jbe@0
|
1707 }
|
|
jbe@130
|
1708 /* terminate idle workers in case of shutdown and check if shutdown is complete */
|
|
jbe@0
|
1709 if (moonbr_shutdown_in_progress) {
|
|
jbe@195
|
1710 int remaining = 0;
|
|
jbe@0
|
1711 for (pool=moonbr_first_pool; pool; pool=pool->next_pool) {
|
|
jbe@195
|
1712 while (pool->idle_worker_count) {
|
|
jbe@195
|
1713 moonbr_terminate_idle_worker(moonbr_pop_idle_worker(pool));
|
|
jbe@130
|
1714 }
|
|
jbe@195
|
1715 if (pool->first_worker) remaining = 1;
|
|
jbe@0
|
1716 }
|
|
jbe@195
|
1717 if (!remaining) {
|
|
jbe@0
|
1718 moonbr_log(LOG_INFO, "All worker threads have terminated");
|
|
jbe@0
|
1719 moonbr_terminate(MOONBR_EXITCODE_GRACEFUL);
|
|
jbe@0
|
1720 }
|
|
jbe@0
|
1721 }
|
|
jbe@0
|
1722 if (moonbr_poll_refresh_needed) moonbr_poll_refresh();
|
|
jbe@0
|
1723 moonbr_cond_poll = 1;
|
|
jbe@0
|
1724 if (!moonbr_cond_child && !moonbr_cond_terminate && !moonbr_cond_interrupt) {
|
|
jbe@0
|
1725 int timeout;
|
|
jbe@0
|
1726 if (timerisset(&wait)) {
|
|
jbe@0
|
1727 if (timercmp(&wait, &now, <)) {
|
|
jbe@0
|
1728 moonbr_log(LOG_CRIT, "Internal error (should not happen): Future is in the past");
|
|
jbe@0
|
1729 moonbr_terminate_error();
|
|
jbe@0
|
1730 }
|
|
jbe@0
|
1731 timersub(&wait, &now, &wait);
|
|
jbe@0
|
1732 timeout = wait.tv_sec * 1000 + wait.tv_usec / 1000;
|
|
jbe@0
|
1733 } else {
|
|
jbe@0
|
1734 timeout = INFTIM;
|
|
jbe@0
|
1735 }
|
|
jbe@0
|
1736 if (moonbr_debug) {
|
|
jbe@0
|
1737 moonbr_log(LOG_DEBUG, "Waiting for I/O");
|
|
jbe@0
|
1738 }
|
|
jbe@0
|
1739 poll(moonbr_poll_fds, moonbr_poll_fds_count, timeout);
|
|
jbe@0
|
1740 } else {
|
|
jbe@0
|
1741 if (moonbr_debug) {
|
|
jbe@0
|
1742 moonbr_log(LOG_DEBUG, "Do not wait for I/O");
|
|
jbe@0
|
1743 }
|
|
jbe@0
|
1744 }
|
|
jbe@0
|
1745 moonbr_cond_poll = 0;
|
|
jbe@0
|
1746 moonbr_poll_reset_signal();
|
|
jbe@0
|
1747 }
|
|
jbe@0
|
1748 }
|
|
jbe@0
|
1749
|
|
jbe@0
|
1750
|
|
jbe@0
|
1751 /*** Lua interface ***/
|
|
jbe@0
|
1752
|
|
jbe@0
|
1753 static int moonbr_lua_panic(lua_State *L) {
|
|
jbe@0
|
1754 const char *errmsg;
|
|
jbe@0
|
1755 errmsg = lua_tostring(L, -1);
|
|
jbe@0
|
1756 if (!errmsg) {
|
|
jbe@0
|
1757 if (lua_isnoneornil(L, -1)) errmsg = "(error message is nil)";
|
|
jbe@0
|
1758 else errmsg = "(error message is not a string)";
|
|
jbe@0
|
1759 }
|
|
jbe@0
|
1760 if (moonbr_pstate == MOONBR_PSTATE_FORKED) {
|
|
jbe@0
|
1761 fprintf(stderr, "Uncaught Lua error: %s\n", errmsg);
|
|
jbe@0
|
1762 exit(1);
|
|
jbe@0
|
1763 } else {
|
|
jbe@0
|
1764 moonbr_log(LOG_CRIT, "Uncaught Lua error: %s", errmsg);
|
|
jbe@0
|
1765 moonbr_terminate_error();
|
|
jbe@0
|
1766 }
|
|
jbe@0
|
1767 return 0;
|
|
jbe@0
|
1768 }
|
|
jbe@0
|
1769
|
|
jbe@0
|
1770 static int moonbr_addtraceback(lua_State *L) {
|
|
jbe@0
|
1771 luaL_traceback(L, L, luaL_tolstring(L, 1, NULL), 1);
|
|
jbe@0
|
1772 return 1;
|
|
jbe@0
|
1773 }
|
|
jbe@0
|
1774
|
|
jbe@0
|
1775 /* Memory allocator that allows limiting memory consumption */
|
|
jbe@0
|
1776 static void *moonbr_alloc (void *ud, void *ptr, size_t osize, size_t nsize) {
|
|
jbe@0
|
1777 (void)ud; /* not used */
|
|
jbe@0
|
1778 if (nsize == 0) {
|
|
jbe@0
|
1779 if (ptr) {
|
|
jbe@0
|
1780 moonbr_memory_usage -= osize;
|
|
jbe@0
|
1781 free(ptr);
|
|
jbe@0
|
1782 }
|
|
jbe@0
|
1783 return NULL;
|
|
jbe@0
|
1784 } else if (ptr) {
|
|
jbe@0
|
1785 if (
|
|
jbe@0
|
1786 moonbr_memory_limit &&
|
|
jbe@0
|
1787 nsize > osize &&
|
|
jbe@0
|
1788 moonbr_memory_usage + (nsize - osize) > moonbr_memory_limit
|
|
jbe@0
|
1789 ) {
|
|
jbe@0
|
1790 return NULL;
|
|
jbe@0
|
1791 } else {
|
|
jbe@0
|
1792 ptr = realloc(ptr, nsize);
|
|
jbe@0
|
1793 if (ptr) moonbr_memory_usage += nsize - osize;
|
|
jbe@0
|
1794 }
|
|
jbe@0
|
1795 } else {
|
|
jbe@0
|
1796 if (
|
|
jbe@0
|
1797 moonbr_memory_limit &&
|
|
jbe@0
|
1798 moonbr_memory_usage + nsize > moonbr_memory_limit
|
|
jbe@0
|
1799 ) {
|
|
jbe@0
|
1800 return NULL;
|
|
jbe@0
|
1801 } else {
|
|
jbe@0
|
1802 ptr = realloc(ptr, nsize);
|
|
jbe@0
|
1803 if (ptr) moonbr_memory_usage += nsize;
|
|
jbe@0
|
1804 }
|
|
jbe@0
|
1805 }
|
|
jbe@0
|
1806 return ptr;
|
|
jbe@0
|
1807 }
|
|
jbe@0
|
1808
|
|
jbe@66
|
1809 static int moonbr_lua_tonatural(lua_State *L, int idx) {
|
|
jbe@66
|
1810 int isnum;
|
|
jbe@66
|
1811 lua_Number n;
|
|
jbe@66
|
1812 n = lua_tonumberx(L, idx, &isnum);
|
|
jbe@66
|
1813 if (isnum && n>=0 && n<INT_MAX && (lua_Number)(int)n == n) return n;
|
|
jbe@66
|
1814 else return -1;
|
|
jbe@66
|
1815 }
|
|
jbe@66
|
1816
|
|
jbe@66
|
1817 static int moonbr_lua_totimeval(lua_State *L, int idx, struct timeval *value) {
|
|
jbe@66
|
1818 int isnum;
|
|
jbe@66
|
1819 lua_Number n;
|
|
jbe@66
|
1820 n = lua_tonumberx(L, idx, &isnum);
|
|
jbe@66
|
1821 if (isnum && n>=0 && n<=100000000) {
|
|
jbe@66
|
1822 value->tv_sec = n;
|
|
jbe@66
|
1823 value->tv_usec = 1e6 * (n - value->tv_sec);
|
|
jbe@66
|
1824 return 1;
|
|
jbe@66
|
1825 } else {
|
|
jbe@66
|
1826 return 0;
|
|
jbe@66
|
1827 }
|
|
jbe@66
|
1828 }
|
|
jbe@66
|
1829
|
|
jbe@0
|
1830 static int moonbr_timeout(lua_State *L) {
|
|
jbe@0
|
1831 struct itimerval oldval;
|
|
jbe@0
|
1832 if (lua_isnoneornil(L, 1) && lua_isnoneornil(L, 2)) {
|
|
jbe@0
|
1833 getitimer(ITIMER_REAL, &oldval);
|
|
jbe@0
|
1834 } else {
|
|
jbe@0
|
1835 struct itimerval newval = {};
|
|
jbe@39
|
1836 timerclear(&newval.it_interval);
|
|
jbe@39
|
1837 timerclear(&newval.it_value);
|
|
jbe@0
|
1838 if (lua_toboolean(L, 1)) {
|
|
jbe@0
|
1839 luaL_argcheck(
|
|
jbe@0
|
1840 L, moonbr_lua_totimeval(L, 1, &newval.it_value), 1,
|
|
jbe@0
|
1841 "interval in seconds expected"
|
|
jbe@0
|
1842 );
|
|
jbe@0
|
1843 }
|
|
jbe@0
|
1844 if (lua_isnoneornil(L, 2)) {
|
|
jbe@0
|
1845 if (setitimer(ITIMER_REAL, &newval, &oldval)) {
|
|
jbe@0
|
1846 moonbr_log(LOG_CRIT, "Could not set ITIMER_REAL via setitimer()");
|
|
jbe@0
|
1847 moonbr_terminate_error();
|
|
jbe@0
|
1848 }
|
|
jbe@0
|
1849 } else {
|
|
jbe@0
|
1850 getitimer(ITIMER_REAL, &oldval);
|
|
jbe@39
|
1851 if (!timerisset(&oldval.it_value)) {
|
|
jbe@39
|
1852 if (setitimer(ITIMER_REAL, &newval, NULL)) {
|
|
jbe@39
|
1853 moonbr_log(LOG_CRIT, "Could not set ITIMER_REAL via setitimer()");
|
|
jbe@39
|
1854 moonbr_terminate_error();
|
|
jbe@39
|
1855 }
|
|
jbe@39
|
1856 lua_call(L, lua_gettop(L) - 2, LUA_MULTRET);
|
|
jbe@39
|
1857 timerclear(&newval.it_value);
|
|
jbe@39
|
1858 if (setitimer(ITIMER_REAL, &newval, NULL)) {
|
|
jbe@39
|
1859 moonbr_log(LOG_CRIT, "Could not set ITIMER_REAL via setitimer()");
|
|
jbe@39
|
1860 moonbr_terminate_error();
|
|
jbe@39
|
1861 }
|
|
jbe@39
|
1862 } else if (timercmp(&newval.it_value, &oldval.it_value, <)) {
|
|
jbe@0
|
1863 struct itimerval remval;
|
|
jbe@0
|
1864 if (setitimer(ITIMER_REAL, &newval, NULL)) {
|
|
jbe@0
|
1865 moonbr_log(LOG_CRIT, "Could not set ITIMER_REAL via setitimer()");
|
|
jbe@0
|
1866 moonbr_terminate_error();
|
|
jbe@0
|
1867 }
|
|
jbe@0
|
1868 lua_call(L, lua_gettop(L) - 2, LUA_MULTRET);
|
|
jbe@0
|
1869 getitimer(ITIMER_REAL, &remval);
|
|
jbe@0
|
1870 timersub(&oldval.it_value, &newval.it_value, &newval.it_value);
|
|
jbe@0
|
1871 timeradd(&newval.it_value, &remval.it_value, &newval.it_value);
|
|
jbe@0
|
1872 if (setitimer(ITIMER_REAL, &newval, NULL)) {
|
|
jbe@0
|
1873 moonbr_log(LOG_CRIT, "Could not set ITIMER_REAL via setitimer()");
|
|
jbe@0
|
1874 moonbr_terminate_error();
|
|
jbe@0
|
1875 }
|
|
jbe@0
|
1876 } else {
|
|
jbe@0
|
1877 lua_call(L, lua_gettop(L) - 2, LUA_MULTRET);
|
|
jbe@0
|
1878 }
|
|
jbe@0
|
1879 return lua_gettop(L) - 1;
|
|
jbe@0
|
1880 }
|
|
jbe@0
|
1881 }
|
|
jbe@115
|
1882 lua_pushnumber(L, oldval.it_value.tv_sec + 1e-6 * oldval.it_value.tv_usec);
|
|
jbe@0
|
1883 return 1;
|
|
jbe@0
|
1884 }
|
|
jbe@0
|
1885
|
|
jbe@264
|
1886 #define moonbr_listen_init_pool_forkoption(luaname, cname, defval) do { \
|
|
jbe@0
|
1887 lua_getfield(L, 2, luaname); \
|
|
jbe@0
|
1888 pool->cname = lua_isnil(L, -1) ? (defval) : moonbr_lua_tonatural(L, -1); \
|
|
jbe@0
|
1889 } while(0)
|
|
jbe@0
|
1890
|
|
jbe@0
|
1891 #define moonbr_listen_init_pool_timeoption(luaname, cname, defval, defvalu) ( \
|
|
jbe@0
|
1892 lua_getfield(L, 2, luaname), \
|
|
jbe@0
|
1893 lua_isnil(L, -1) ? ( \
|
|
jbe@0
|
1894 pool->cname.tv_sec = (defval), pool->cname.tv_usec = (defvalu), \
|
|
jbe@0
|
1895 1 \
|
|
jbe@0
|
1896 ) : ( \
|
|
jbe@0
|
1897 (lua_isboolean(L, -1) && !lua_toboolean(L, -1)) ? ( \
|
|
jbe@0
|
1898 pool->cname.tv_sec = 0, pool->cname.tv_usec = 0, \
|
|
jbe@0
|
1899 1 \
|
|
jbe@0
|
1900 ) : ( \
|
|
jbe@0
|
1901 moonbr_lua_totimeval(L, -1, &pool->cname) \
|
|
jbe@0
|
1902 ) \
|
|
jbe@0
|
1903 ) \
|
|
jbe@0
|
1904 )
|
|
jbe@0
|
1905
|
|
jbe@0
|
1906 static int moonbr_listen_init_pool(lua_State *L) {
|
|
jbe@0
|
1907 struct moonbr_pool *pool;
|
|
jbe@0
|
1908 const char *proto;
|
|
jbe@274
|
1909 int is_main;
|
|
jbe@0
|
1910 int i;
|
|
jbe@127
|
1911 int dynamic = 0; /* nonzero = listeners exist which require dynamic worker creation */
|
|
jbe@0
|
1912 pool = lua_touserdata(L, 1);
|
|
jbe@0
|
1913 for (i=0; i<pool->listener_count; i++) {
|
|
jbe@0
|
1914 struct moonbr_listener *listener = &pool->listener[i];
|
|
jbe@0
|
1915 lua_settop(L, 2);
|
|
jbe@3
|
1916 #if LUA_VERSION_NUM >= 503
|
|
jbe@3
|
1917 lua_geti(L, 2, i+1);
|
|
jbe@3
|
1918 #else
|
|
jbe@0
|
1919 lua_pushinteger(L, i+1);
|
|
jbe@0
|
1920 lua_gettable(L, 2);
|
|
jbe@3
|
1921 #endif
|
|
jbe@0
|
1922 lua_getfield(L, 3, "proto");
|
|
jbe@0
|
1923 proto = lua_tostring(L, -1);
|
|
jbe@274
|
1924 is_main = !strcmp(proto, "main");
|
|
jbe@274
|
1925 if (proto && (is_main || !strcmp(proto, "interval"))) {
|
|
jbe@0
|
1926 listener->proto = MOONBR_PROTO_INTERVAL;
|
|
jbe@0
|
1927 lua_getfield(L, 3, "name");
|
|
jbe@0
|
1928 {
|
|
jbe@0
|
1929 const char *name = lua_tostring(L, -1);
|
|
jbe@0
|
1930 if (name) {
|
|
jbe@211
|
1931 char *name_dup = strdup(name);
|
|
jbe@211
|
1932 if (!name_dup) {
|
|
jbe@0
|
1933 moonbr_log(LOG_CRIT, "Memory allocation_error");
|
|
jbe@0
|
1934 moonbr_terminate_error();
|
|
jbe@0
|
1935 }
|
|
jbe@211
|
1936 listener->type_specific.interval.name = name_dup;
|
|
jbe@0
|
1937 }
|
|
jbe@0
|
1938 }
|
|
jbe@274
|
1939 if (is_main) {
|
|
jbe@274
|
1940 listener->type_specific.interval.main = 1;
|
|
jbe@274
|
1941 } else {
|
|
jbe@274
|
1942 listener->type_specific.interval.main = 0;
|
|
jbe@274
|
1943 dynamic = 1;
|
|
jbe@274
|
1944 lua_getfield(L, 3, "delay");
|
|
jbe@274
|
1945 if (
|
|
jbe@274
|
1946 !moonbr_lua_totimeval(L, -1, &listener->type_specific.interval.delay) ||
|
|
jbe@274
|
1947 !timerisset(&listener->type_specific.interval.delay)
|
|
jbe@274
|
1948 ) {
|
|
jbe@274
|
1949 luaL_error(L, "No valid interval delay specified; use listen{{proto=\"interval\", delay=...}, ...}");
|
|
jbe@274
|
1950 }
|
|
jbe@274
|
1951 lua_getfield(L, 3, "strict");
|
|
jbe@274
|
1952 if (!lua_isnil(L, -1)) {
|
|
jbe@274
|
1953 if (lua_isboolean(L, -1)) {
|
|
jbe@274
|
1954 if (lua_toboolean(L, -1)) listener->type_specific.interval.strict = 1;
|
|
jbe@274
|
1955 } else {
|
|
jbe@274
|
1956 luaL_error(L, "Option \"strict\" must be a boolean if set; use listen{{proto=\"interval\", strict=true, ...}, ...}");
|
|
jbe@274
|
1957 }
|
|
jbe@0
|
1958 }
|
|
jbe@0
|
1959 }
|
|
jbe@0
|
1960 } else if (proto && !strcmp(proto, "local")) {
|
|
jbe@125
|
1961 const char *path;
|
|
jbe@125
|
1962 const int path_maxlen = (
|
|
jbe@125
|
1963 sizeof(listener->type_specific.socket.addr.addr_un) -
|
|
jbe@125
|
1964 ((void *)listener->type_specific.socket.addr.addr_un.sun_path - (void *)&listener->type_specific.socket.addr.addr_un)
|
|
jbe@125
|
1965 ) - 1; /* one byte for termination */
|
|
jbe@127
|
1966 dynamic = 1;
|
|
jbe@0
|
1967 listener->proto = MOONBR_PROTO_LOCAL;
|
|
jbe@0
|
1968 lua_getfield(L, 3, "path");
|
|
jbe@125
|
1969 path = lua_tostring(L, -1);
|
|
jbe@125
|
1970 if (!path) {
|
|
jbe@125
|
1971 luaL_error(L, "No valid path specified for local socket; use listen{{proto=\"local\", path=...}, ...}");
|
|
jbe@125
|
1972 }
|
|
jbe@125
|
1973 if (strlen(path) > path_maxlen) {
|
|
jbe@125
|
1974 luaL_error(L, "Path name for local socket exceeded maximum length of %i characters", path_maxlen);
|
|
jbe@125
|
1975 }
|
|
jbe@309
|
1976 listener->type_specific.socket.addr.addr_un.sun_family = AF_LOCAL;
|
|
jbe@125
|
1977 strcpy(listener->type_specific.socket.addr.addr_un.sun_path, path);
|
|
jbe@309
|
1978 listener->type_specific.socket.addrlen = sizeof(listener->type_specific.socket.addr.addr_un);
|
|
jbe@125
|
1979 } else if (proto && !strcmp(proto, "tcp")) {
|
|
jbe@125
|
1980 const char *host, *port;
|
|
jbe@125
|
1981 struct addrinfo hints = { 0, };
|
|
jbe@125
|
1982 struct addrinfo *res, *addrinfo;
|
|
jbe@125
|
1983 int errcode;
|
|
jbe@125
|
1984 const char *ip;
|
|
jbe@127
|
1985 dynamic = 1;
|
|
jbe@125
|
1986 lua_getfield(L, 3, "host");
|
|
jbe@125
|
1987 host = lua_isnil(L, -1) ? "::" : lua_tostring(L, -1);
|
|
jbe@125
|
1988 if (!host) {
|
|
jbe@125
|
1989 luaL_error(L, "No host specified; use listen{{proto=\"tcp\", host=...}, ...}");
|
|
jbe@125
|
1990 }
|
|
jbe@125
|
1991 lua_getfield(L, 3, "port");
|
|
jbe@125
|
1992 port = lua_tostring(L, -1);
|
|
jbe@125
|
1993 if (!port) {
|
|
jbe@125
|
1994 luaL_error(L, "No port specified; use listen{{proto=\"tcp\", host=...}, ...}");
|
|
jbe@125
|
1995 }
|
|
jbe@125
|
1996 hints.ai_family = AF_UNSPEC;
|
|
jbe@125
|
1997 hints.ai_socktype = SOCK_STREAM;
|
|
jbe@125
|
1998 hints.ai_protocol = IPPROTO_TCP;
|
|
jbe@125
|
1999 hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE;
|
|
jbe@125
|
2000 errcode = getaddrinfo(host, port, &hints, &res);
|
|
jbe@125
|
2001 if (errcode) {
|
|
jbe@125
|
2002 freeaddrinfo(res);
|
|
jbe@125
|
2003 if (errcode == EAI_SYSTEM) {
|
|
jbe@213
|
2004 char errmsg[MOONBR_MAXSTRERRORLEN] = MOONBR_STRERROR_R_MSG;
|
|
jbe@125
|
2005 strerror_r(errno, errmsg, MOONBR_MAXSTRERRORLEN); /* use thread-safe call in case child created threads */
|
|
jbe@125
|
2006 luaL_error(L, "Could not resolve host: %s: %s", gai_strerror(errcode), errmsg);
|
|
jbe@125
|
2007 } else {
|
|
jbe@125
|
2008 luaL_error(L, "Could not resolve host: %s", gai_strerror(errcode));
|
|
jbe@0
|
2009 }
|
|
jbe@0
|
2010 }
|
|
jbe@125
|
2011 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
|
|
jbe@125
|
2012 if (addrinfo->ai_family == AF_INET6) goto moonbr_listen_init_pool_found;
|
|
jbe@125
|
2013 }
|
|
jbe@125
|
2014 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
|
|
jbe@125
|
2015 if (addrinfo->ai_family == AF_INET) goto moonbr_listen_init_pool_found;
|
|
jbe@0
|
2016 }
|
|
jbe@125
|
2017 addrinfo = res;
|
|
jbe@125
|
2018 moonbr_listen_init_pool_found:
|
|
jbe@125
|
2019 if (addrinfo->ai_addrlen > sizeof(listener->type_specific.socket.addr)) {
|
|
jbe@125
|
2020 moonbr_log(LOG_CRIT, "Size of ai_addrlen is unexpectedly big (should not happen)");
|
|
jbe@125
|
2021 moonbr_terminate_error();
|
|
jbe@0
|
2022 }
|
|
jbe@125
|
2023 memcpy(&listener->type_specific.socket.addr, addrinfo->ai_addr, addrinfo->ai_addrlen);
|
|
jbe@125
|
2024 listener->type_specific.socket.addrlen = addrinfo->ai_addrlen;
|
|
jbe@125
|
2025 switch (addrinfo->ai_family) {
|
|
jbe@125
|
2026 case AF_INET6:
|
|
jbe@125
|
2027 ip = inet_ntop(
|
|
jbe@125
|
2028 addrinfo->ai_family,
|
|
jbe@125
|
2029 &((struct sockaddr_in6 *)addrinfo->ai_addr)->sin6_addr,
|
|
jbe@125
|
2030 listener->proto_specific.tcp.ip,
|
|
jbe@125
|
2031 INET6_ADDRSTRLEN
|
|
jbe@125
|
2032 );
|
|
jbe@125
|
2033 if (!ip) {
|
|
jbe@125
|
2034 moonbr_log(LOG_CRIT, "System error in inet_ntop call: %s", strerror(errno));
|
|
jbe@125
|
2035 moonbr_terminate_error();
|
|
jbe@125
|
2036 }
|
|
jbe@125
|
2037 listener->proto_specific.tcp.port = ntohs(((struct sockaddr_in6 *)addrinfo->ai_addr)->sin6_port);
|
|
jbe@125
|
2038 break;
|
|
jbe@125
|
2039 case AF_INET:
|
|
jbe@125
|
2040 ip = inet_ntop(
|
|
jbe@125
|
2041 addrinfo->ai_family,
|
|
jbe@125
|
2042 &((struct sockaddr_in *)addrinfo->ai_addr)->sin_addr,
|
|
jbe@125
|
2043 listener->proto_specific.tcp.ip,
|
|
jbe@307
|
2044 INET_ADDRSTRLEN
|
|
jbe@125
|
2045 );
|
|
jbe@125
|
2046 if (!ip) {
|
|
jbe@125
|
2047 moonbr_log(LOG_CRIT, "System error in inet_ntop call: %s", strerror(errno));
|
|
jbe@125
|
2048 moonbr_terminate_error();
|
|
jbe@125
|
2049 }
|
|
jbe@125
|
2050 listener->proto_specific.tcp.port = ntohs(((struct sockaddr_in *)addrinfo->ai_addr)->sin_port);
|
|
jbe@125
|
2051 break;
|
|
jbe@125
|
2052 default:
|
|
jbe@125
|
2053 strcpy(listener->proto_specific.tcp.ip, "unknown");
|
|
jbe@125
|
2054 listener->proto_specific.tcp.port = 0;
|
|
jbe@0
|
2055 }
|
|
jbe@125
|
2056 listener->proto = MOONBR_PROTO_TCP;
|
|
jbe@125
|
2057 } else if (proto) {
|
|
jbe@125
|
2058 luaL_error(L, "Unknown protocol \"%s\"", proto);
|
|
jbe@125
|
2059 } else {
|
|
jbe@125
|
2060 luaL_error(L, "No valid protocol specified; use listen{{proto=..., ...}, ...}");
|
|
jbe@0
|
2061 }
|
|
jbe@0
|
2062 }
|
|
jbe@0
|
2063 lua_settop(L, 2);
|
|
jbe@127
|
2064 if (dynamic) {
|
|
jbe@127
|
2065 moonbr_listen_init_pool_forkoption("pre_fork", pre_fork, 1);
|
|
jbe@127
|
2066 moonbr_listen_init_pool_forkoption("min_fork", min_fork, pool->pre_fork > 2 ? pool->pre_fork : 2);
|
|
jbe@127
|
2067 moonbr_listen_init_pool_forkoption("max_fork", max_fork, pool->min_fork > 16 ? pool->min_fork : 16);
|
|
jbe@127
|
2068 if (!moonbr_listen_init_pool_timeoption("fork_delay", fork_delay, 0, 250000)) {
|
|
jbe@127
|
2069 luaL_error(L, "Option \"fork_delay\" is expected to be a non-negative number");
|
|
jbe@127
|
2070 }
|
|
jbe@127
|
2071 if (!moonbr_listen_init_pool_timeoption("fork_error_delay", fork_error_delay, 2, 0)) {
|
|
jbe@127
|
2072 luaL_error(L, "Option \"fork_error_delay\" is expected to be a non-negative number");
|
|
jbe@127
|
2073 }
|
|
jbe@127
|
2074 if (!moonbr_listen_init_pool_timeoption("exit_delay", exit_delay, 60, 0)) {
|
|
jbe@127
|
2075 luaL_error(L, "Option \"exit_delay\" is expected to be a non-negative number");
|
|
jbe@127
|
2076 }
|
|
jbe@127
|
2077 if (timercmp(&pool->fork_error_delay, &pool->fork_delay, <)) {
|
|
jbe@127
|
2078 pool->fork_error_delay = pool->fork_delay;
|
|
jbe@127
|
2079 }
|
|
jbe@127
|
2080 if (!moonbr_listen_init_pool_timeoption("idle_timeout", idle_timeout, 0, 0)) {
|
|
jbe@127
|
2081 luaL_error(L, "Option \"idle_timeout\" is expected to be a non-negative number");
|
|
jbe@127
|
2082 }
|
|
jbe@127
|
2083 } else {
|
|
jbe@127
|
2084 pool->pre_fork = 0;
|
|
jbe@127
|
2085 pool->min_fork = pool->listener_count;
|
|
jbe@127
|
2086 pool->max_fork = pool->listener_count;
|
|
jbe@0
|
2087 }
|
|
jbe@0
|
2088 lua_getfield(L, 2, "memory_limit");
|
|
jbe@0
|
2089 if (!lua_isnil(L, -1)) {
|
|
jbe@0
|
2090 int isnum;
|
|
jbe@0
|
2091 lua_Number n;
|
|
jbe@0
|
2092 n = lua_tonumberx(L, -1, &isnum);
|
|
jbe@0
|
2093 if (n < 0 || !isnum) {
|
|
jbe@0
|
2094 luaL_error(L, "Option \"memory_limit\" is expected to be a non-negative number");
|
|
jbe@0
|
2095 }
|
|
jbe@0
|
2096 pool->memory_limit = n;
|
|
jbe@0
|
2097 }
|
|
jbe@0
|
2098 lua_settop(L, 2);
|
|
jbe@0
|
2099 lua_getfield(L, 2, "prepare");
|
|
jbe@0
|
2100 if (!lua_isnil(L, -1) && !lua_isfunction(L, -1)) {
|
|
jbe@0
|
2101 luaL_error(L, "Option \"prepare\" must be nil or a function");
|
|
jbe@0
|
2102 }
|
|
jbe@0
|
2103 lua_rawsetp(L, LUA_REGISTRYINDEX, moonbr_luakey_prepare_func(pool));
|
|
jbe@0
|
2104 lua_getfield(L, 2, "connect");
|
|
jbe@0
|
2105 if (!lua_isfunction(L, -1)) {
|
|
jbe@0
|
2106 luaL_error(L, "Option \"connect\" must be a function; use listen{{...}, {...}, connect=function(socket) ... end, ...}");
|
|
jbe@0
|
2107 }
|
|
jbe@0
|
2108 lua_rawsetp(L, LUA_REGISTRYINDEX, moonbr_luakey_connect_func(pool));
|
|
jbe@0
|
2109 lua_getfield(L, 2, "finish");
|
|
jbe@0
|
2110 if (!lua_isnil(L, -1) && !lua_isfunction(L, -1)) {
|
|
jbe@0
|
2111 luaL_error(L, "Option \"finish\" must be nil or a function");
|
|
jbe@0
|
2112 }
|
|
jbe@0
|
2113 lua_rawsetp(L, LUA_REGISTRYINDEX, moonbr_luakey_finish_func(pool));
|
|
jbe@0
|
2114 return 0;
|
|
jbe@0
|
2115 }
|
|
jbe@0
|
2116
|
|
jbe@0
|
2117 static int moonbr_listen(lua_State *L) {
|
|
jbe@0
|
2118 struct moonbr_pool *pool;
|
|
jbe@0
|
2119 lua_Integer listener_count;
|
|
jbe@0
|
2120 if (moonbr_booted) luaL_error(L, "Moonbridge bootup is already complete");
|
|
jbe@0
|
2121 luaL_checktype(L, 1, LUA_TTABLE);
|
|
jbe@0
|
2122 listener_count = luaL_len(L, 1);
|
|
jbe@0
|
2123 if (!listener_count) luaL_error(L, "No listen ports specified; use listen{{proto=..., port=...},...}");
|
|
jbe@0
|
2124 if (listener_count > 100) luaL_error(L, "Too many listeners");
|
|
jbe@0
|
2125 pool = moonbr_create_pool(listener_count);
|
|
jbe@0
|
2126 lua_pushcfunction(L, moonbr_listen_init_pool);
|
|
jbe@0
|
2127 lua_pushlightuserdata(L, pool);
|
|
jbe@0
|
2128 lua_pushvalue(L, 1);
|
|
jbe@0
|
2129 if (lua_pcall(L, 2, 0, 0)) goto moonbr_listen_error;
|
|
jbe@0
|
2130 {
|
|
jbe@0
|
2131 int i;
|
|
jbe@0
|
2132 i = moonbr_start_pool(pool);
|
|
jbe@0
|
2133 if (i >= 0) {
|
|
jbe@125
|
2134 lua_pushfstring(L, "Could not initialize listener #%d: %s", i+1, strerror(errno));
|
|
jbe@125
|
2135 moonbr_listen_error:
|
|
jbe@125
|
2136 moonbr_destroy_pool(pool);
|
|
jbe@125
|
2137 lua_pushnil(L);
|
|
jbe@125
|
2138 lua_rawsetp(L, LUA_REGISTRYINDEX, moonbr_luakey_prepare_func(pool));
|
|
jbe@125
|
2139 lua_pushnil(L);
|
|
jbe@125
|
2140 lua_rawsetp(L, LUA_REGISTRYINDEX, moonbr_luakey_connect_func(pool));
|
|
jbe@125
|
2141 lua_pushnil(L);
|
|
jbe@125
|
2142 lua_rawsetp(L, LUA_REGISTRYINDEX, moonbr_luakey_finish_func(pool));
|
|
jbe@125
|
2143 lua_error(L);
|
|
jbe@0
|
2144 }
|
|
jbe@0
|
2145 }
|
|
jbe@0
|
2146 return 0;
|
|
jbe@0
|
2147 }
|
|
jbe@0
|
2148
|
|
jbe@0
|
2149
|
|
jbe@9
|
2150 /*** Function to modify Lua's library path and/or cpath ***/
|
|
jbe@9
|
2151
|
|
jbe@9
|
2152 #if defined(MOONBR_LUA_PATH) || defined(MOONBR_LUA_CPATH)
|
|
jbe@9
|
2153 static void moonbr_modify_path(lua_State *L, char *key, char *value) {
|
|
jbe@9
|
2154 int stackbase;
|
|
jbe@9
|
2155 stackbase = lua_gettop(L);
|
|
jbe@9
|
2156 lua_getglobal(L, "package");
|
|
jbe@9
|
2157 lua_getfield(L, stackbase+1, key);
|
|
jbe@9
|
2158 {
|
|
jbe@9
|
2159 const char *current_str;
|
|
jbe@9
|
2160 size_t current_strlen;
|
|
jbe@9
|
2161 luaL_Buffer buf;
|
|
jbe@9
|
2162 current_str = lua_tolstring(L, stackbase+2, ¤t_strlen);
|
|
jbe@9
|
2163 luaL_buffinit(L, &buf);
|
|
jbe@9
|
2164 if (current_str) {
|
|
jbe@9
|
2165 lua_pushvalue(L, stackbase+2);
|
|
jbe@9
|
2166 luaL_addvalue(&buf);
|
|
jbe@9
|
2167 if (current_strlen && current_str[current_strlen-1] != ';') {
|
|
jbe@9
|
2168 luaL_addchar(&buf, ';');
|
|
jbe@9
|
2169 }
|
|
jbe@9
|
2170 }
|
|
jbe@9
|
2171 luaL_addstring(&buf, value);
|
|
jbe@9
|
2172 luaL_pushresult(&buf);
|
|
jbe@9
|
2173 }
|
|
jbe@9
|
2174 lua_setfield(L, stackbase+1, key);
|
|
jbe@9
|
2175 lua_settop(L, stackbase);
|
|
jbe@9
|
2176 }
|
|
jbe@9
|
2177 #endif
|
|
jbe@9
|
2178
|
|
jbe@9
|
2179
|
|
jbe@0
|
2180 /*** Main function and command line invokation ***/
|
|
jbe@0
|
2181
|
|
jbe@0
|
2182 static void moonbr_usage(int err, const char *cmd) {
|
|
jbe@0
|
2183 FILE *out;
|
|
jbe@0
|
2184 out = err ? stderr : stdout;
|
|
jbe@0
|
2185 if (!cmd) cmd = "moonbridge";
|
|
jbe@0
|
2186 fprintf(out, "Get this help message: %s {-h|--help}\n", cmd);
|
|
jbe@0
|
2187 fprintf(out, "Usage: %s \\\n", cmd);
|
|
jbe@0
|
2188 fprintf(out, " [-b|--background] \\\n");
|
|
jbe@0
|
2189 fprintf(out, " [-d|--debug] \\\n");
|
|
jbe@0
|
2190 fprintf(out, " [-f|--logfacility {DAEMON|USER|0|1|...|7}] \\\n");
|
|
jbe@0
|
2191 fprintf(out, " [-i|--logident <syslog ident> \\\n");
|
|
jbe@0
|
2192 fprintf(out, " [-l|--logfile <logfile>] \\\n");
|
|
jbe@0
|
2193 fprintf(out, " [-p|--pidfile <pidfile>] \\\n");
|
|
jbe@0
|
2194 fprintf(out, " [-s|--stats] \\\n");
|
|
jbe@2
|
2195 fprintf(out, " -- <Lua script> [<cmdline options for Lua script>]\n");
|
|
jbe@0
|
2196 exit(err);
|
|
jbe@0
|
2197 }
|
|
jbe@0
|
2198
|
|
jbe@0
|
2199 #define moonbr_usage_error() moonbr_usage(MOONBR_EXITCODE_CMDLINEERROR, argc ? argv[0] : NULL)
|
|
jbe@0
|
2200
|
|
jbe@0
|
2201 int main(int argc, char **argv) {
|
|
jbe@0
|
2202 {
|
|
jbe@0
|
2203 int daemonize = 0;
|
|
jbe@0
|
2204 int log_facility = LOG_USER;
|
|
jbe@0
|
2205 const char *log_ident = "moonbridge";
|
|
jbe@0
|
2206 const char *log_filename = NULL;
|
|
jbe@0
|
2207 const char *pid_filename = NULL;
|
|
jbe@0
|
2208 int option;
|
|
jbe@0
|
2209 struct option longopts[] = {
|
|
jbe@0
|
2210 { "background", no_argument, NULL, 'b' },
|
|
jbe@0
|
2211 { "debug", no_argument, NULL, 'd' },
|
|
jbe@0
|
2212 { "logfacility", required_argument, NULL, 'f' },
|
|
jbe@0
|
2213 { "help", no_argument, NULL, 'h' },
|
|
jbe@0
|
2214 { "logident", required_argument, NULL, 'i' },
|
|
jbe@0
|
2215 { "logfile", required_argument, NULL, 'l' },
|
|
jbe@0
|
2216 { "pidfile", required_argument, NULL, 'p' },
|
|
jbe@231
|
2217 { "stats", no_argument, NULL, 's' },
|
|
jbe@231
|
2218 { NULL, 0, NULL, 0 }
|
|
jbe@0
|
2219 };
|
|
jbe@0
|
2220 while ((option = getopt_long(argc, argv, "bdf:hi:l:p:s", longopts, NULL)) != -1) {
|
|
jbe@0
|
2221 switch (option) {
|
|
jbe@0
|
2222 case 'b':
|
|
jbe@0
|
2223 daemonize = 1;
|
|
jbe@0
|
2224 break;
|
|
jbe@0
|
2225 case 'd':
|
|
jbe@0
|
2226 moonbr_debug = 1;
|
|
jbe@0
|
2227 moonbr_stat = 1;
|
|
jbe@0
|
2228 break;
|
|
jbe@0
|
2229 case 'f':
|
|
jbe@0
|
2230 if (!strcmp(optarg, "DAEMON")) {
|
|
jbe@0
|
2231 log_facility = LOG_DAEMON;
|
|
jbe@0
|
2232 } else if (!strcmp(optarg, "USER")) {
|
|
jbe@0
|
2233 log_facility = LOG_USER;
|
|
jbe@0
|
2234 } else if (!strcmp(optarg, "0")) {
|
|
jbe@0
|
2235 log_facility = LOG_LOCAL0;
|
|
jbe@0
|
2236 } else if (!strcmp(optarg, "1")) {
|
|
jbe@0
|
2237 log_facility = LOG_LOCAL1;
|
|
jbe@0
|
2238 } else if (!strcmp(optarg, "2")) {
|
|
jbe@0
|
2239 log_facility = LOG_LOCAL2;
|
|
jbe@0
|
2240 } else if (!strcmp(optarg, "3")) {
|
|
jbe@0
|
2241 log_facility = LOG_LOCAL3;
|
|
jbe@0
|
2242 } else if (!strcmp(optarg, "4")) {
|
|
jbe@0
|
2243 log_facility = LOG_LOCAL4;
|
|
jbe@0
|
2244 } else if (!strcmp(optarg, "5")) {
|
|
jbe@0
|
2245 log_facility = LOG_LOCAL5;
|
|
jbe@0
|
2246 } else if (!strcmp(optarg, "6")) {
|
|
jbe@0
|
2247 log_facility = LOG_LOCAL6;
|
|
jbe@0
|
2248 } else if (!strcmp(optarg, "7")) {
|
|
jbe@0
|
2249 log_facility = LOG_LOCAL7;
|
|
jbe@0
|
2250 } else {
|
|
jbe@0
|
2251 moonbr_usage_error();
|
|
jbe@0
|
2252 }
|
|
jbe@0
|
2253 moonbr_use_syslog = 1;
|
|
jbe@0
|
2254 break;
|
|
jbe@0
|
2255 case 'h':
|
|
jbe@0
|
2256 moonbr_usage(MOONBR_EXITCODE_GRACEFUL, argv[0]);
|
|
jbe@0
|
2257 break;
|
|
jbe@0
|
2258 case 'i':
|
|
jbe@0
|
2259 log_ident = optarg;
|
|
jbe@0
|
2260 moonbr_use_syslog = 1;
|
|
jbe@0
|
2261 break;
|
|
jbe@0
|
2262 case 'l':
|
|
jbe@0
|
2263 log_filename = optarg;
|
|
jbe@0
|
2264 break;
|
|
jbe@0
|
2265 case 'p':
|
|
jbe@0
|
2266 pid_filename = optarg;
|
|
jbe@0
|
2267 break;
|
|
jbe@0
|
2268 case 's':
|
|
jbe@0
|
2269 moonbr_stat = 1;
|
|
jbe@0
|
2270 break;
|
|
jbe@0
|
2271 default:
|
|
jbe@0
|
2272 moonbr_usage_error();
|
|
jbe@0
|
2273 }
|
|
jbe@0
|
2274 }
|
|
jbe@2
|
2275 if (argc - optind < 1) moonbr_usage_error();
|
|
jbe@0
|
2276 if (pid_filename) {
|
|
jbe@0
|
2277 pid_t otherpid;
|
|
jbe@0
|
2278 while ((moonbr_pidfh = pidfile_open(pid_filename, 0644, &otherpid)) == NULL) {
|
|
jbe@0
|
2279 if (errno == EEXIST) {
|
|
jbe@0
|
2280 if (otherpid == -1) {
|
|
jbe@0
|
2281 fprintf(stderr, "PID file \"%s\" is already locked\n", pid_filename);
|
|
jbe@0
|
2282 } else {
|
|
jbe@0
|
2283 fprintf(stderr, "PID file \"%s\" is already locked by process with PID: %i\n", pid_filename, (int)otherpid);
|
|
jbe@0
|
2284 }
|
|
jbe@0
|
2285 exit(MOONBR_EXITCODE_ALREADYRUNNING);
|
|
jbe@0
|
2286 } else if (errno != EINTR) {
|
|
jbe@0
|
2287 fprintf(stderr, "Could not write PID file \"%s\": %s\n", pid_filename, strerror(errno));
|
|
jbe@0
|
2288 exit(MOONBR_EXITCODE_STARTUPERROR);
|
|
jbe@0
|
2289 }
|
|
jbe@0
|
2290 }
|
|
jbe@0
|
2291 }
|
|
jbe@0
|
2292 if (log_filename) {
|
|
jbe@0
|
2293 int logfd;
|
|
jbe@0
|
2294 while (
|
|
jbe@0
|
2295 ( logfd = flopen(
|
|
jbe@0
|
2296 log_filename,
|
|
jbe@0
|
2297 O_WRONLY|O_NONBLOCK|O_CREAT|O_APPEND|O_CLOEXEC,
|
|
jbe@0
|
2298 0640
|
|
jbe@0
|
2299 )
|
|
jbe@0
|
2300 ) < 0
|
|
jbe@0
|
2301 ) {
|
|
jbe@0
|
2302 if (errno == EWOULDBLOCK) {
|
|
jbe@0
|
2303 fprintf(stderr, "Logfile \"%s\" is locked\n", log_filename);
|
|
jbe@0
|
2304 exit(MOONBR_EXITCODE_ALREADYRUNNING);
|
|
jbe@0
|
2305 } else if (errno != EINTR) {
|
|
jbe@0
|
2306 fprintf(stderr, "Could not open logfile \"%s\": %s\n", log_filename, strerror(errno));
|
|
jbe@0
|
2307 exit(MOONBR_EXITCODE_STARTUPERROR);
|
|
jbe@0
|
2308 }
|
|
jbe@0
|
2309 }
|
|
jbe@0
|
2310 moonbr_logfile = fdopen(logfd, "a");
|
|
jbe@0
|
2311 if (!moonbr_logfile) {
|
|
jbe@0
|
2312 fprintf(stderr, "Could not open write stream to logfile \"%s\": %s\n", log_filename, strerror(errno));
|
|
jbe@0
|
2313 exit(MOONBR_EXITCODE_STARTUPERROR);
|
|
jbe@0
|
2314 }
|
|
jbe@0
|
2315 }
|
|
jbe@0
|
2316 if (daemonize == 0 && !moonbr_logfile) moonbr_logfile = stderr;
|
|
jbe@0
|
2317 if (moonbr_logfile) setlinebuf(moonbr_logfile);
|
|
jbe@0
|
2318 else moonbr_use_syslog = 1;
|
|
jbe@0
|
2319 if (moonbr_use_syslog) openlog(log_ident, LOG_NDELAY | LOG_PID, log_facility);
|
|
jbe@0
|
2320 if (daemonize) {
|
|
jbe@0
|
2321 if (daemon(1, 0)) {
|
|
jbe@0
|
2322 moonbr_log(LOG_ERR, "Could not daemonize moonbridge process");
|
|
jbe@0
|
2323 moonbr_terminate_error();
|
|
jbe@0
|
2324 }
|
|
jbe@0
|
2325 }
|
|
jbe@0
|
2326 }
|
|
jbe@0
|
2327 moonbr_log(LOG_NOTICE, "Starting moonbridge server");
|
|
jbe@0
|
2328 if (moonbr_pidfh && pidfile_write(moonbr_pidfh)) {
|
|
jbe@0
|
2329 moonbr_log(LOG_ERR, "Could not write pidfile (after locking)");
|
|
jbe@0
|
2330 }
|
|
jbe@0
|
2331 {
|
|
jbe@0
|
2332 lua_State *L;
|
|
jbe@0
|
2333 L = lua_newstate(moonbr_alloc, NULL);
|
|
jbe@0
|
2334 if (!L) {
|
|
jbe@0
|
2335 moonbr_log(LOG_CRIT, "Could not initialize Lua state");
|
|
jbe@0
|
2336 moonbr_terminate_error();
|
|
jbe@0
|
2337 }
|
|
jbe@0
|
2338 lua_atpanic(L, moonbr_lua_panic);
|
|
jbe@58
|
2339 lua_pushliteral(L, MOONBR_VERSION_STRING);
|
|
jbe@58
|
2340 lua_setglobal(L, "_MOONBRIDGE_VERSION");
|
|
jbe@0
|
2341 luaL_openlibs(L);
|
|
jbe@89
|
2342 luaL_requiref(L, "moonbridge_io", luaopen_moonbridge_io, 1);
|
|
jbe@89
|
2343 lua_pop(L, 1);
|
|
jbe@8
|
2344 #ifdef MOONBR_LUA_PATH
|
|
jbe@9
|
2345 moonbr_modify_path(L, "path", MOONBR_LUA_PATH);
|
|
jbe@9
|
2346 #endif
|
|
jbe@9
|
2347 #ifdef MOONBR_LUA_CPATH
|
|
jbe@9
|
2348 moonbr_modify_path(L, "cpath", MOONBR_LUA_CPATH);
|
|
jbe@8
|
2349 #endif
|
|
jbe@0
|
2350 lua_pushcfunction(L, moonbr_timeout);
|
|
jbe@0
|
2351 lua_setglobal(L, "timeout");
|
|
jbe@0
|
2352 lua_pushcfunction(L, moonbr_listen);
|
|
jbe@0
|
2353 lua_setglobal(L, "listen");
|
|
jbe@17
|
2354 lua_pushcfunction(L, moonbr_addtraceback); /* on stack position 1 */
|
|
jbe@2
|
2355 moonbr_log(LOG_INFO, "Loading \"%s\"", argv[optind]);
|
|
jbe@2
|
2356 if (luaL_loadfile(L, argv[optind])) {
|
|
jbe@2
|
2357 moonbr_log(LOG_ERR, "Error while loading \"%s\": %s", argv[optind], lua_tostring(L, -1));
|
|
jbe@2
|
2358 moonbr_terminate_error();
|
|
jbe@2
|
2359 }
|
|
jbe@2
|
2360 { int i; for (i=optind+1; i<argc; i++) lua_pushstring(L, argv[i]); }
|
|
jbe@2
|
2361 if (lua_pcall(L, argc-(optind+1), 0, 1)) {
|
|
jbe@2
|
2362 moonbr_log(LOG_ERR, "Error while executing \"%s\": %s", argv[optind], lua_tostring(L, -1));
|
|
jbe@2
|
2363 moonbr_terminate_error();
|
|
jbe@0
|
2364 }
|
|
jbe@6
|
2365 if (!moonbr_first_pool) {
|
|
jbe@6
|
2366 moonbr_log(LOG_WARNING, "No listener initialized.");
|
|
jbe@6
|
2367 moonbr_terminate_error();
|
|
jbe@6
|
2368 }
|
|
jbe@0
|
2369 lua_getglobal(L, "listen");
|
|
jbe@0
|
2370 lua_pushcfunction(L, moonbr_listen);
|
|
jbe@0
|
2371 if (lua_compare(L, -2, -1, LUA_OPEQ)) {
|
|
jbe@0
|
2372 lua_pushnil(L);
|
|
jbe@0
|
2373 lua_setglobal(L, "listen");
|
|
jbe@0
|
2374 }
|
|
jbe@0
|
2375 lua_settop(L, 1);
|
|
jbe@223
|
2376 lua_gc(L, LUA_GCCOLLECT, 0); /* collect garbage before forking later */
|
|
jbe@0
|
2377 moonbr_run(L);
|
|
jbe@0
|
2378 }
|
|
jbe@0
|
2379 return 0;
|
|
jbe@0
|
2380 }
|
|
jbe@0
|
2381
|