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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 "0.4.0"
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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 #if defined(__linux__)
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21 #define _GNU_SOURCE
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22 #endif
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23 #include <stdlib.h>
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24 #include <unistd.h>
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25 #include <stdint.h>
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26 #include <errno.h>
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27 #include <getopt.h>
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28 #include <syslog.h>
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29 #include <string.h>
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30 #include <stdio.h>
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31 #include <time.h>
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32 #include <sys/time.h>
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33 #include <sys/socket.h>
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34 #include <sys/un.h>
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35 #include <netinet/in.h>
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36 #include <netdb.h>
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37 #include <arpa/inet.h>
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38 #include <poll.h>
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39 #include <signal.h>
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40 #include <sys/wait.h>
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41 #include <sys/resource.h>
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42 #include <sys/file.h>
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43 #if defined(__FreeBSD__) || __has_include(<libutil.h>)
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44 #include <libutil.h>
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45 #endif
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46 #if defined(__linux__) || __has_include(<bsd/stdio.h>)
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47 #include <bsd/stdio.h>
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48 #endif
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49 #if defined(__linux__) || __has_include(<bsd/libutil.h>)
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50 #include <bsd/libutil.h>
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51 #endif
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52 #if defined(__linux__) || __has_include(<bsd/unistd.h>)
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53 #include <bsd/unistd.h>
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54 #endif
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55
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56
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57 /*** Fallback definitions for missing constants on some platforms ***/
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58
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59 /* INFTIM is used as timeout parameter for poll() */
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60 #ifndef INFTIM
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61 #define INFTIM -1
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62 #endif
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63
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64
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65 /*** Include directives for Lua ***/
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66
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67 #include <lua.h>
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68 #include <lauxlib.h>
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69 #include <lualib.h>
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70
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71
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72 /*** Include directive for moonbridge_io library ***/
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73
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74 #include "moonbridge_io.h"
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75
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76
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77 /*** Constants ***/
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78
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79 /* Backlog option for listen() call */
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80 #define MOONBR_LISTEN_BACKLOG 1024
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81
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82 /* Maximum length of a timestamp used for strftime() */
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83 #define MOONBR_LOG_MAXTIMELEN 40
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84
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85 /* Maximum length of a log message */
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86 #define MOONBR_LOG_MAXMSGLEN 4095
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87
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88 /* Exitcodes passed to exit() call */
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89 #define MOONBR_EXITCODE_GRACEFUL 0
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90 #define MOONBR_EXITCODE_CMDLINEERROR 1
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91 #define MOONBR_EXITCODE_ALREADYRUNNING 2
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92 #define MOONBR_EXITCODE_STARTUPERROR 3
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93 #define MOONBR_EXITCODE_RUNTIMEERROR 4
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94
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95 /* Maximum length of a line sent to stderr by child processes */
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96 #define MOONBR_MAXERRORLINELEN 1024
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97
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98 /* Maximum length of an error string returned by strerror() */
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99 #define MOONBR_MAXSTRERRORLEN 80
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100
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101 /* Status bytes exchanged between master and child processes */
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102 #define MOONBR_STATUS_IDLE 'I'
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103 #define MOONBR_COMMAND_CONNECT 'C'
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104 #define MOONBR_COMMAND_TERMINATE 'T'
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105 #define MOONBR_STATUS_GOODBYE 'B'
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106
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107 /* Constant file descriptors */
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108 #define MOONBR_FD_STDERR 2
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109 #define MOONBR_FD_CONTROL 3
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110 #define MOONBR_FD_END 4
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111
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112 /* Return values of moonbr_try_destroy_worker() */
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113 #define MOONBR_DESTROY_NONE 0
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114 #define MOONBR_DESTROY_PREPARE 1
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115 #define MOONBR_DESTROY_IDLE_OR_ASSIGNED 2
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116
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117
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118 /*** Types ***/
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119
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120 /* Enum for 'moonbr_pstate' */
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121 #define MOONBR_PSTATE_STARTUP 0
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122 #define MOONBR_PSTATE_RUNNING 1
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123 #define MOONBR_PSTATE_FORKED 2
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124
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125 /* Enum for 'proto' field of struct moonbr_listener */
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jbe@127
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126 #define MOONBR_PROTO_MAIN 1
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127 #define MOONBR_PROTO_INTERVAL 2
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128 #define MOONBR_PROTO_LOCAL 3
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129 #define MOONBR_PROTO_TCP 4
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130
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131 /* Data structure for a pool's listener that can accept incoming connections */
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132 struct moonbr_listener {
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133 struct moonbr_pool *pool;
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134 struct moonbr_listener *prev_listener; /* previous idle or(!) connected listener */
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135 struct moonbr_listener *next_listener; /* next idle or(!) connected listener */
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136 int proto;
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137 union {
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138 struct {
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139 char *name; /* name of interval passed to 'connect' function as 'interval' field in table */
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140 int strict; /* nonzero = runtime of 'connect' function does not delay interval */
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141 struct timeval delay; /* interval between invocations of 'connect' function */
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142 struct timeval wakeup; /* point in time of next invocation */
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143 } interval;
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144 struct {
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145 union {
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146 struct sockaddr addr_abstract;
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147 struct sockaddr_un addr_un;
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148 struct sockaddr_in addr_in;
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149 struct sockaddr_in6 addr_in6;
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150 } addr;
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151 socklen_t addrlen;
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152 } socket;
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153 } type_specific;
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154 union {
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155 struct {
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156 char ip[INET6_ADDRSTRLEN]; /* IP to listen on */
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157 int port; /* port number to listen on (in host endianess) */
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158 } tcp;
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159 } proto_specific;
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160 int listenfd; /* -1 = none */
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161 int pollidx; /* -1 = none */
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162 };
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163
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164 /* Data structure for a child process that is handling incoming connections */
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165 struct moonbr_worker {
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166 struct moonbr_pool *pool;
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167 struct moonbr_worker *prev_worker;
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168 struct moonbr_worker *next_worker;
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169 struct moonbr_worker *prev_idle_worker;
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170 struct moonbr_worker *next_idle_worker;
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171 int main; /* nonzero = terminate Moonbridge when this worker dies */
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172 int idle; /* nonzero = waiting for command from parent process */
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173 int assigned; /* nonzero = currently handling a connection */
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174 pid_t pid;
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175 int controlfd; /* socket to send/receive control message to/from child process */
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176 int errorfd; /* socket to receive error output from child process' stderr */
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177 char *errorlinebuf; /* optional buffer for collecting stderr data from child process */
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178 int errorlinelen; /* number of bytes stored in 'errorlinebuf' */
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179 int errorlineovf; /* nonzero = line length overflow */
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180 struct timeval idle_expiration; /* point in time until child process may stay in idle state */
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181 struct moonbr_listener *restart_interval_listener; /* set while interval listener is assigned */
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182 };
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183
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184 /* Data structure for a pool of workers and listeners */
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185 struct moonbr_pool {
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186 int poolnum; /* number of pool for log output */
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187 struct moonbr_pool *next_pool; /* next entry in linked list starting with 'moonbr_first_pool' */
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188 struct moonbr_worker *first_worker; /* first worker of pool */
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189 struct moonbr_worker *last_worker; /* last worker of pool */
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190 struct moonbr_worker *first_idle_worker; /* first idle worker of pool */
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191 struct moonbr_worker *last_idle_worker; /* last idle worker of pool */
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192 int idle_worker_count;
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193 int unassigned_worker_count;
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194 int total_worker_count;
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195 int worker_count_stat; /* only needed for statistics */
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196 int pre_fork; /* desired minimum number of unassigned workers */
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197 int min_fork; /* desired minimum number of workers in total */
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198 int max_fork; /* maximum number of workers */
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199 struct timeval fork_delay; /* delay after each fork() until a fork may happen again */
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200 struct timeval fork_wakeup; /* point in time when a fork may happen again (unless a worker terminates before) */
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201 struct timeval fork_error_delay; /* delay between fork()s when an error during fork or preparation occurred */
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202 struct timeval fork_error_wakeup; /* point in time when fork may happen again if an error in preparation occurred */
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203 int use_fork_error_wakeup; /* nonzero = error in preparation occured; gets reset on next fork */
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204 struct timeval exit_delay; /* delay for terminating excessive workers (unassigned_worker_count > pre_fork) */
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205 struct timeval exit_wakeup; /* point in time when terminating an excessive worker */
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206 struct timeval idle_timeout; /* delay before an idle worker is terminated */
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207 size_t memory_limit; /* maximum bytes of memory that the Lua machine may allocate */
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208 int listener_count; /* total number of listeners of pool (and size of 'listener' array at end of this struct) */
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209 struct moonbr_listener *first_idle_listener; /* first listener that is idle (i.e. has no waiting connection) */
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210 struct moonbr_listener *last_idle_listener; /* last listener that is idle (i.e. has no waiting connection) */
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211 struct moonbr_listener *first_connected_listener; /* first listener that has a pending connection */
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212 struct moonbr_listener *last_connected_listener; /* last listener that has a pending connection */
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213 struct moonbr_listener listener[1]; /* static array of variable(!) size to contain 'listener' structures */
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214 };
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215
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216 /* Enum for 'channel' field of struct moonbr_poll_worker */
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217 #define MOONBR_POLL_WORKER_CONTROLCHANNEL 1
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218 #define MOONBR_POLL_WORKER_ERRORCHANNEL 2
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219
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220 /* Structure to refer from 'moonbr_poll_worker_fds' entry to worker structure */
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221 struct moonbr_poll_worker {
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222 struct moonbr_worker *worker;
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223 int channel; /* field indicating whether file descriptor is 'controlfd' or 'errorfd' */
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224 };
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225
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226 /* Variable indicating that clean shutdown was requested */
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227 static int moonbr_shutdown_in_progress = 0;
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228
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229
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jbe@0
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230 /*** Macros for Lua registry ***/
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231
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232 /* Lightuserdata keys for Lua registry to store 'prepare', 'connect', and 'finish' functions */
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233 #define moonbr_luakey_prepare_func(pool) ((void *)(intptr_t)(pool) + 0)
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234 #define moonbr_luakey_connect_func(pool) ((void *)(intptr_t)(pool) + 1)
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235 #define moonbr_luakey_finish_func(pool) ((void *)(intptr_t)(pool) + 2)
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236
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237
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jbe@0
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238 /*** Global variables ***/
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239
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240 /* State of process execution */
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241 static int moonbr_pstate = MOONBR_PSTATE_STARTUP;
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242
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243 /* Process ID of the main process */
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244 static pid_t moonbr_masterpid;
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245
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246 /* Condition variables set by the signal handler */
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jbe@0
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247 static volatile sig_atomic_t moonbr_cond_poll = 0;
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248 static volatile sig_atomic_t moonbr_cond_terminate = 0;
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249 static volatile sig_atomic_t moonbr_cond_interrupt = 0;
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250 static volatile sig_atomic_t moonbr_cond_child = 0;
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251
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252 /* Socket pair to denote signal delivery when signal handler was called just before poll() */
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253 static int moonbr_poll_signalfds[2];
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254 #define moonbr_poll_signalfd_read moonbr_poll_signalfds[0]
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255 #define moonbr_poll_signalfd_write moonbr_poll_signalfds[1]
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256
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257 /* Global variables for pidfile and logging */
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258 static struct pidfh *moonbr_pidfh = NULL;
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259 static FILE *moonbr_logfile = NULL;
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260 static int moonbr_use_syslog = 0;
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261
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262 /* First and last entry of linked list of all created pools during initialization */
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263 static struct moonbr_pool *moonbr_first_pool = NULL;
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264 static struct moonbr_pool *moonbr_last_pool = NULL;
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265
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266 /* Total count of pools */
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267 static int moonbr_pool_count = 0;
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268
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269 /* Set to a nonzero value if dynamic part of 'moonbr_poll_fds' ('moonbr_poll_worker_fds') needs an update */
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270 static int moonbr_poll_refresh_needed = 0;
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271
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272 /* Array passed to poll(), consisting of static part and dynamic part ('moonbr_poll_worker_fds') */
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273 static struct pollfd *moonbr_poll_fds = NULL; /* the array */
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274 static int moonbr_poll_fds_bufsize = 0; /* memory allocated for this number of elements */
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275 static int moonbr_poll_fds_count = 0; /* total number of elements */
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276 static int moonbr_poll_fds_static_count; /* number of elements in static part */
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277
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278 /* Dynamic part of 'moonbr_poll_fds' array */
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279 #define moonbr_poll_worker_fds (moonbr_poll_fds+moonbr_poll_fds_static_count)
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280
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281 /* Additional information for dynamic part of 'moonbr_poll_fds' array */
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282 struct moonbr_poll_worker *moonbr_poll_workers; /* the array */
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283 static int moonbr_poll_workers_bufsize = 0; /* memory allocated for this number of elements */
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284 static int moonbr_poll_worker_count = 0; /* number of elements in array */
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285
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286 /* Variable set to nonzero value to disallow further calls of 'listen' function */
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287 static int moonbr_booted = 0;
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288
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289 /* Verbosity settings */
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290 static int moonbr_debug = 0;
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291 static int moonbr_stat = 0;
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292
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293 /* Memory consumption by Lua machine */
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294 static size_t moonbr_memory_usage = 0;
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295 static size_t moonbr_memory_limit = 0;
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296
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297
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298 /*** Functions for signal handling ***/
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299
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300 /* Signal handler for master and child processes */
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301 static void moonbr_signal(int sig) {
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302 if (getpid() == moonbr_masterpid) {
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303 /* master process */
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jbe@0
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304 switch (sig) {
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jbe@0
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305 case SIGHUP:
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jbe@0
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306 case SIGINT:
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jbe@0
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307 /* fast shutdown requested */
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308 moonbr_cond_interrupt = 1;
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309 break;
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310 case SIGTERM:
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jbe@0
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311 /* clean shutdown requested */
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312 moonbr_cond_terminate = 1;
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313 break;
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jbe@0
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314 case SIGCHLD:
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jbe@0
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315 /* child process terminated */
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jbe@0
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316 moonbr_cond_child = 1;
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317 break;
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318 }
|
jbe@0
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319 if (moonbr_cond_poll) {
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320 /* avoid race condition if signal handler is invoked right before poll() */
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321 char buf[1] = {0};
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jbe@20
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322 write(moonbr_poll_signalfd_write, buf, 1);
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jbe@0
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323 }
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jbe@0
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324 } else {
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325 /* child process forwards certain signals to parent process */
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326 switch (sig) {
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jbe@0
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327 case SIGHUP:
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jbe@0
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328 case SIGINT:
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jbe@0
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329 case SIGTERM:
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jbe@0
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330 kill(moonbr_masterpid, sig);
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jbe@0
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331 }
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jbe@0
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332 }
|
jbe@0
|
333 }
|
jbe@0
|
334
|
jbe@0
|
335 /* Initialize signal handling */
|
jbe@0
|
336 static void moonbr_signal_init(){
|
jbe@0
|
337 moonbr_masterpid = getpid();
|
jbe@0
|
338 signal(SIGHUP, moonbr_signal);
|
jbe@0
|
339 signal(SIGINT, moonbr_signal);
|
jbe@0
|
340 signal(SIGTERM, moonbr_signal);
|
jbe@0
|
341 signal(SIGCHLD, moonbr_signal);
|
jbe@0
|
342 }
|
jbe@0
|
343
|
jbe@0
|
344
|
jbe@0
|
345 /*** Functions for logging in master process ***/
|
jbe@0
|
346
|
jbe@0
|
347 /* Logs a pre-formatted message with given syslog() priority */
|
jbe@0
|
348 static void moonbr_log_msg(int priority, const char *msg) {
|
jbe@0
|
349 if (moonbr_logfile) {
|
jbe@0
|
350 /* logging to logfile desired (timestamp is prepended in that case) */
|
jbe@0
|
351 time_t now_time = 0;
|
jbe@0
|
352 struct tm now_tmstruct;
|
jbe@0
|
353 char timestr[MOONBR_LOG_MAXTIMELEN+1];
|
jbe@0
|
354 time(&now_time);
|
jbe@0
|
355 localtime_r(&now_time, &now_tmstruct);
|
jbe@0
|
356 if (!strftime(
|
jbe@0
|
357 timestr, MOONBR_LOG_MAXTIMELEN+1, "%Y-%m-%d %H:%M:%S %Z: ", &now_tmstruct
|
jbe@0
|
358 )) timestr[0] = 0;
|
jbe@0
|
359 fprintf(moonbr_logfile, "%s%s\n", timestr, msg);
|
jbe@0
|
360 }
|
jbe@0
|
361 if (moonbr_use_syslog) {
|
jbe@0
|
362 /* logging through syslog desired */
|
jbe@0
|
363 syslog(priority, "%s", msg);
|
jbe@0
|
364 }
|
jbe@0
|
365 }
|
jbe@0
|
366
|
jbe@0
|
367 /* Formats a message via vsnprintf() and logs it with given syslog() priority */
|
jbe@0
|
368 static void moonbr_log(int priority, const char *message, ...) {
|
jbe@0
|
369 char msgbuf[MOONBR_LOG_MAXMSGLEN+1]; /* buffer of static size to store formatted message */
|
jbe@0
|
370 int msglen; /* length of full message (may exceed MOONBR_LOG_MAXMSGLEN) */
|
jbe@0
|
371 {
|
jbe@0
|
372 /* pass variable arguments to vsnprintf() to format message */
|
jbe@0
|
373 va_list ap;
|
jbe@0
|
374 va_start(ap, message);
|
jbe@0
|
375 msglen = vsnprintf(msgbuf, MOONBR_LOG_MAXMSGLEN+1, message, ap);
|
jbe@0
|
376 va_end(ap);
|
jbe@0
|
377 }
|
jbe@0
|
378 {
|
jbe@0
|
379 /* split and log message line by line */
|
jbe@0
|
380 char *line = msgbuf;
|
jbe@0
|
381 while (1) {
|
jbe@0
|
382 char *endptr = strchr(line, '\n');
|
jbe@0
|
383 if (endptr) {
|
jbe@0
|
384 /* terminate string where newline character is found */
|
jbe@0
|
385 *endptr = 0;
|
jbe@0
|
386 } else if (line != msgbuf && msglen > MOONBR_LOG_MAXMSGLEN) {
|
jbe@0
|
387 /* break if line is incomplete and not the first line */
|
jbe@0
|
388 break;
|
jbe@0
|
389 }
|
jbe@0
|
390 moonbr_log_msg(priority, line);
|
jbe@0
|
391 if (!endptr) break; /* break if end of formatted message is reached */
|
jbe@0
|
392 line = endptr+1; /* otherwise continue with remaining message */
|
jbe@0
|
393 }
|
jbe@0
|
394 }
|
jbe@0
|
395 if (msglen > MOONBR_LOG_MAXMSGLEN) {
|
jbe@0
|
396 /* print warning if message was truncated */
|
jbe@0
|
397 moonbr_log_msg(priority, "Previous log message has been truncated due to excessive length");
|
jbe@0
|
398 }
|
jbe@0
|
399 }
|
jbe@0
|
400
|
jbe@0
|
401
|
jbe@0
|
402 /*** Termination function ***/
|
jbe@0
|
403
|
jbe@0
|
404 /* Kill all child processes, remove PID file (if existent), and exit master process with given exitcode */
|
jbe@0
|
405 static void moonbr_terminate(int exitcode) {
|
jbe@0
|
406 {
|
jbe@0
|
407 struct moonbr_pool *pool;
|
jbe@0
|
408 for (pool=moonbr_first_pool; pool; pool=pool->next_pool) {
|
jbe@0
|
409 {
|
jbe@0
|
410 struct moonbr_worker *worker;
|
jbe@0
|
411 for (worker=pool->first_worker; worker; worker=worker->next_worker) {
|
jbe@0
|
412 moonbr_log(LOG_INFO, "Sending SIGKILL to child with PID %i", (int)worker->pid);
|
jbe@0
|
413 if (kill(worker->pid, SIGKILL)) {
|
jbe@0
|
414 moonbr_log(LOG_ERR, "Error while killing child process: %s", strerror(errno));
|
jbe@0
|
415 }
|
jbe@0
|
416 }
|
jbe@0
|
417 }
|
jbe@0
|
418 {
|
jbe@0
|
419 int i;
|
jbe@0
|
420 for (i=0; i<pool->listener_count; i++) {
|
jbe@0
|
421 struct moonbr_listener *listener = &pool->listener[i];
|
jbe@0
|
422 if (listener->proto == MOONBR_PROTO_LOCAL) {
|
jbe@125
|
423 moonbr_log(LOG_INFO, "Unlinking local socket \"%s\"", listener->type_specific.socket.addr.addr_un.sun_path);
|
jbe@125
|
424 if (unlink(listener->type_specific.socket.addr.addr_un.sun_path)) {
|
jbe@0
|
425 moonbr_log(LOG_ERR, "Error while unlinking local socket: %s", strerror(errno));
|
jbe@0
|
426 }
|
jbe@0
|
427 }
|
jbe@0
|
428 }
|
jbe@0
|
429 }
|
jbe@0
|
430 }
|
jbe@0
|
431 }
|
jbe@0
|
432 moonbr_log(exitcode ? LOG_ERR : LOG_NOTICE, "Terminating with exit code %i", exitcode);
|
jbe@0
|
433 if (moonbr_pidfh && pidfile_remove(moonbr_pidfh)) {
|
jbe@0
|
434 moonbr_log(LOG_ERR, "Error while removing PID file: %s", strerror(errno));
|
jbe@0
|
435 }
|
jbe@0
|
436 exit(exitcode);
|
jbe@0
|
437 }
|
jbe@0
|
438
|
jbe@0
|
439 /* Terminate with either MOONBR_EXITCODE_STARTUPERROR or MOONBR_EXITCODE_RUNTIMEERROR */
|
jbe@0
|
440 #define moonbr_terminate_error() \
|
jbe@0
|
441 moonbr_terminate( \
|
jbe@0
|
442 moonbr_pstate == MOONBR_PSTATE_STARTUP ? \
|
jbe@0
|
443 MOONBR_EXITCODE_STARTUPERROR : \
|
jbe@0
|
444 MOONBR_EXITCODE_RUNTIMEERROR \
|
jbe@0
|
445 )
|
jbe@0
|
446
|
jbe@0
|
447
|
jbe@0
|
448 /*** Helper functions ***/
|
jbe@0
|
449
|
jbe@0
|
450 /* Fills a 'struct timeval' structure with the current time (using CLOCK_MONOTONIC) */
|
jbe@0
|
451 static void moonbr_now(struct timeval *now) {
|
jbe@0
|
452 struct timespec ts = {0, };
|
jbe@0
|
453 if (clock_gettime(CLOCK_MONOTONIC, &ts)) {
|
jbe@0
|
454 moonbr_log(LOG_CRIT, "Error in clock_gettime() call: %s", strerror(errno));
|
jbe@0
|
455 moonbr_terminate_error();
|
jbe@0
|
456 }
|
jbe@0
|
457 *now = (struct timeval){ .tv_sec = ts.tv_sec, .tv_usec = ts.tv_nsec / 1000 };
|
jbe@0
|
458 }
|
jbe@0
|
459
|
jbe@0
|
460 /* Formats a 'struct timeval' value (not thread-safe) */
|
jbe@0
|
461 static char *moonbr_format_timeval(struct timeval *t) {
|
jbe@0
|
462 static char buf[32];
|
jbe@0
|
463 snprintf(buf, 32, "%ji.%06ji seconds", (intmax_t)t->tv_sec, (intmax_t)t->tv_usec);
|
jbe@0
|
464 return buf;
|
jbe@0
|
465 }
|
jbe@0
|
466
|
jbe@0
|
467
|
jbe@0
|
468 /*** Functions for pool creation and startup ***/
|
jbe@0
|
469
|
jbe@0
|
470 /* Creates a 'struct moonbr_pool' structure with a given number of listeners */
|
jbe@0
|
471 static struct moonbr_pool *moonbr_create_pool(int listener_count) {
|
jbe@0
|
472 struct moonbr_pool *pool;
|
jbe@0
|
473 pool = calloc(1,
|
jbe@0
|
474 sizeof(struct moonbr_pool) + /* size of 'struct moonbr_pool' with one listener */
|
jbe@0
|
475 (listener_count-1) * sizeof(struct moonbr_listener) /* size of extra listeners */
|
jbe@0
|
476 );
|
jbe@0
|
477 if (!pool) {
|
jbe@0
|
478 moonbr_log(LOG_CRIT, "Memory allocation error");
|
jbe@0
|
479 moonbr_terminate_error();
|
jbe@0
|
480 }
|
jbe@0
|
481 pool->listener_count = listener_count;
|
jbe@0
|
482 {
|
jbe@0
|
483 /* initialization of listeners */
|
jbe@0
|
484 int i;
|
jbe@0
|
485 for (i=0; i<listener_count; i++) {
|
jbe@0
|
486 struct moonbr_listener *listener = &pool->listener[i];
|
jbe@0
|
487 listener->pool = pool;
|
jbe@0
|
488 listener->listenfd = -1;
|
jbe@0
|
489 listener->pollidx = -1;
|
jbe@0
|
490 }
|
jbe@0
|
491 }
|
jbe@0
|
492 return pool;
|
jbe@0
|
493 }
|
jbe@0
|
494
|
jbe@0
|
495 /* Destroys a 'struct moonbr_pool' structure before it has been started */
|
jbe@0
|
496 static void moonbr_destroy_pool(struct moonbr_pool *pool) {
|
jbe@0
|
497 int i;
|
jbe@0
|
498 for (i=0; i<pool->listener_count; i++) {
|
jbe@0
|
499 struct moonbr_listener *listener = &pool->listener[i];
|
jbe@0
|
500 if (
|
jbe@0
|
501 listener->proto == MOONBR_PROTO_INTERVAL &&
|
jbe@125
|
502 listener->type_specific.interval.name
|
jbe@0
|
503 ) {
|
jbe@125
|
504 free(listener->type_specific.interval.name);
|
jbe@0
|
505 }
|
jbe@0
|
506 }
|
jbe@0
|
507 free(pool);
|
jbe@0
|
508 }
|
jbe@0
|
509
|
jbe@0
|
510 /* Starts a all listeners in a pool */
|
jbe@0
|
511 static int moonbr_start_pool(struct moonbr_pool *pool) {
|
jbe@0
|
512 moonbr_log(LOG_INFO, "Creating pool", pool->poolnum);
|
jbe@0
|
513 {
|
jbe@0
|
514 int i;
|
jbe@0
|
515 for (i=0; i<pool->listener_count; i++) {
|
jbe@0
|
516 struct moonbr_listener *listener = &pool->listener[i];
|
jbe@0
|
517 switch (listener->proto) {
|
jbe@127
|
518 case MOONBR_PROTO_MAIN:
|
jbe@127
|
519 /* nothing to do here: starting main thread is performed in moonbr_run() function */
|
jbe@127
|
520 moonbr_log(LOG_INFO, "Adding main thread");
|
jbe@127
|
521 break;
|
jbe@0
|
522 case MOONBR_PROTO_INTERVAL:
|
jbe@17
|
523 /* nothing to do here: starting intervals is performed in moonbr_run() function */
|
jbe@125
|
524 if (!listener->type_specific.interval.name) {
|
jbe@0
|
525 moonbr_log(LOG_INFO, "Adding unnamed interval listener");
|
jbe@0
|
526 } else {
|
jbe@125
|
527 moonbr_log(LOG_INFO, "Adding interval listener \"%s\"", listener->type_specific.interval.name);
|
jbe@0
|
528 }
|
jbe@0
|
529 break;
|
jbe@0
|
530 case MOONBR_PROTO_LOCAL:
|
jbe@125
|
531 moonbr_log(LOG_INFO, "Adding local socket listener for path \"%s\"", listener->type_specific.socket.addr.addr_un.sun_path);
|
jbe@125
|
532 listener->listenfd = socket(PF_LOCAL, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
|
jbe@125
|
533 if (listener->listenfd == -1) goto moonbr_start_pool_error;
|
jbe@125
|
534 if (!unlink(listener->type_specific.socket.addr.addr_un.sun_path)) {
|
jbe@125
|
535 moonbr_log(LOG_WARNING, "Unlinked named socket \"%s\" prior to listening", listener->type_specific.socket.addr.addr_un.sun_path);
|
jbe@125
|
536 } else {
|
jbe@125
|
537 if (errno != ENOENT) {
|
jbe@125
|
538 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
|
539 }
|
jbe@125
|
540 }
|
jbe@125
|
541 if (
|
jbe@125
|
542 bind(listener->listenfd, &listener->type_specific.socket.addr.addr_abstract, listener->type_specific.socket.addrlen)
|
jbe@125
|
543 ) goto moonbr_start_pool_error;
|
jbe@125
|
544 if (listen(listener->listenfd, MOONBR_LISTEN_BACKLOG)) goto moonbr_start_pool_error;
|
jbe@125
|
545 break;
|
jbe@125
|
546 case MOONBR_PROTO_TCP:
|
jbe@125
|
547 moonbr_log(LOG_INFO, "Adding TCP listener on interface \"%s\", port %i", listener->proto_specific.tcp.ip, listener->proto_specific.tcp.port);
|
jbe@125
|
548 listener->listenfd = socket(listener->type_specific.socket.addr.addr_abstract.sa_family, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
|
jbe@125
|
549 if (listener->listenfd == -1) goto moonbr_start_pool_error;
|
jbe@0
|
550 {
|
jbe@125
|
551 /* avoid "Address already in use" error when restarting service */
|
jbe@125
|
552 static const int reuseval = 1;
|
jbe@125
|
553 if (setsockopt(
|
jbe@125
|
554 listener->listenfd, SOL_SOCKET, SO_REUSEADDR, &reuseval, sizeof(reuseval)
|
jbe@125
|
555 )) goto moonbr_start_pool_error;
|
jbe@0
|
556 }
|
jbe@0
|
557 {
|
jbe@125
|
558 /* default to send TCP RST when process terminates unexpectedly */
|
jbe@125
|
559 static const struct linger lingerval = {
|
jbe@125
|
560 .l_onoff = 1,
|
jbe@125
|
561 .l_linger = 0
|
jbe@0
|
562 };
|
jbe@125
|
563 if (setsockopt(
|
jbe@125
|
564 listener->listenfd, SOL_SOCKET, SO_LINGER, &lingerval, sizeof(lingerval)
|
jbe@125
|
565 )) goto moonbr_start_pool_error;
|
jbe@0
|
566 }
|
jbe@125
|
567 if (
|
jbe@125
|
568 bind(listener->listenfd, &listener->type_specific.socket.addr.addr_abstract, listener->type_specific.socket.addrlen)
|
jbe@125
|
569 ) goto moonbr_start_pool_error;
|
jbe@125
|
570 if (listen(listener->listenfd, MOONBR_LISTEN_BACKLOG)) goto moonbr_start_pool_error;
|
jbe@0
|
571 break;
|
jbe@0
|
572 default:
|
jbe@0
|
573 moonbr_log(LOG_CRIT, "Internal error (should not happen): Unexpected value in listener.proto field");
|
jbe@0
|
574 moonbr_terminate_error();
|
jbe@0
|
575 }
|
jbe@0
|
576 }
|
jbe@0
|
577 goto moonbr_start_pool_ok;
|
jbe@0
|
578 moonbr_start_pool_error:
|
jbe@0
|
579 {
|
jbe@0
|
580 int j = i;
|
jbe@0
|
581 int errno2 = errno;
|
jbe@0
|
582 for (; i>=0; i--) {
|
jbe@0
|
583 struct moonbr_listener *listener = &pool->listener[i];
|
jbe@0
|
584 if (listener->listenfd != -1) close(listener->listenfd);
|
jbe@0
|
585 }
|
jbe@0
|
586 errno = errno2;
|
jbe@0
|
587 return j;
|
jbe@0
|
588 }
|
jbe@0
|
589 }
|
jbe@0
|
590 moonbr_start_pool_ok:
|
jbe@0
|
591 pool->poolnum = ++moonbr_pool_count;
|
jbe@0
|
592 moonbr_log(LOG_INFO, "Pool #%i created", pool->poolnum);
|
jbe@0
|
593 if (moonbr_last_pool) moonbr_last_pool->next_pool = pool;
|
jbe@0
|
594 else moonbr_first_pool = pool;
|
jbe@0
|
595 moonbr_last_pool = pool;
|
jbe@0
|
596 return -1;
|
jbe@0
|
597 }
|
jbe@0
|
598
|
jbe@0
|
599
|
jbe@0
|
600 /*** Function to send data and a file descriptor to child process */
|
jbe@0
|
601
|
jbe@0
|
602 /* Sends control message of one bye plus optional file descriptor plus optional pointer to child process */
|
jbe@0
|
603 static void moonbr_send_control_message(struct moonbr_worker *worker, char status, int fd, void *ptr) {
|
jbe@0
|
604 {
|
jbe@0
|
605 struct iovec iovector = { .iov_base = &status, .iov_len = 1 }; /* carrying status byte */
|
jbe@0
|
606 char control_message_buffer[CMSG_SPACE(sizeof(int))] = {0, }; /* used to transfer file descriptor */
|
jbe@0
|
607 struct msghdr message = { .msg_iov = &iovector, .msg_iovlen = 1 }; /* data structure passed to sendmsg() call */
|
jbe@0
|
608 if (moonbr_debug) {
|
jbe@0
|
609 if (fd == -1) {
|
jbe@0
|
610 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
|
611 } else {
|
jbe@0
|
612 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
|
613 }
|
jbe@0
|
614 }
|
jbe@0
|
615 if (fd != -1) {
|
jbe@0
|
616 /* attach control message with file descriptor */
|
jbe@0
|
617 message.msg_control = control_message_buffer;
|
jbe@0
|
618 message.msg_controllen = CMSG_SPACE(sizeof(int));
|
jbe@0
|
619 {
|
jbe@0
|
620 struct cmsghdr *control_message = CMSG_FIRSTHDR(&message);
|
jbe@0
|
621 control_message->cmsg_level = SOL_SOCKET;
|
jbe@0
|
622 control_message->cmsg_type = SCM_RIGHTS;
|
jbe@0
|
623 control_message->cmsg_len = CMSG_LEN(sizeof(int));
|
jbe@18
|
624 memcpy(CMSG_DATA(control_message), &fd, sizeof(int));
|
jbe@0
|
625 }
|
jbe@0
|
626 }
|
jbe@0
|
627 while (sendmsg(worker->controlfd, &message, MSG_NOSIGNAL) < 0) {
|
jbe@0
|
628 if (errno == EPIPE) {
|
jbe@0
|
629 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
|
630 return; /* do not close socket; socket is closed when reading from it */
|
jbe@0
|
631 }
|
jbe@0
|
632 if (errno != EINTR) {
|
jbe@0
|
633 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
|
634 moonbr_terminate_error();
|
jbe@0
|
635 }
|
jbe@0
|
636 }
|
jbe@0
|
637 }
|
jbe@0
|
638 if (ptr) {
|
jbe@0
|
639 char buf[sizeof(void *)];
|
jbe@0
|
640 char *pos = buf;
|
jbe@0
|
641 int len = sizeof(void *);
|
jbe@0
|
642 ssize_t written;
|
jbe@0
|
643 if (moonbr_debug) {
|
jbe@0
|
644 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
|
645 }
|
jbe@18
|
646 memcpy(buf, &ptr, sizeof(void *));
|
jbe@0
|
647 while (len) {
|
jbe@0
|
648 written = send(worker->controlfd, pos, len, MSG_NOSIGNAL);
|
jbe@0
|
649 if (written > 0) {
|
jbe@0
|
650 pos += written;
|
jbe@0
|
651 len -= written;
|
jbe@0
|
652 } else if (errno == EPIPE) {
|
jbe@0
|
653 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
|
654 return; /* do not close socket; socket is closed when reading from it */
|
jbe@0
|
655 } else if (errno != EINTR) {
|
jbe@0
|
656 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
|
657 moonbr_terminate_error();
|
jbe@0
|
658 }
|
jbe@0
|
659 }
|
jbe@0
|
660 }
|
jbe@0
|
661 }
|
jbe@0
|
662
|
jbe@0
|
663
|
jbe@0
|
664 /*** Functions running in child process ***/
|
jbe@0
|
665
|
jbe@0
|
666 /* Logs an error in child process */
|
jbe@0
|
667 static void moonbr_child_log(const char *message) {
|
jbe@0
|
668 fprintf(stderr, "%s\n", message);
|
jbe@0
|
669 }
|
jbe@0
|
670
|
jbe@0
|
671 /* Logs a fatal error in child process and terminates process with error status */
|
jbe@0
|
672 static void moonbr_child_log_fatal(const char *message) {
|
jbe@0
|
673 moonbr_child_log(message);
|
jbe@0
|
674 exit(1);
|
jbe@0
|
675 }
|
jbe@0
|
676
|
jbe@0
|
677 /* Logs an error in child process while appending error string for global errno variable */
|
jbe@0
|
678 static void moonbr_child_log_errno(const char *message) {
|
jbe@0
|
679 char errmsg[MOONBR_MAXSTRERRORLEN];
|
jbe@20
|
680 strerror_r(errno, errmsg, MOONBR_MAXSTRERRORLEN); /* use thread-safe call in case child created threads */
|
jbe@0
|
681 fprintf(stderr, "%s: %s\n", message, errmsg);
|
jbe@0
|
682 }
|
jbe@0
|
683
|
jbe@0
|
684 /* Logs a fatal error in child process while appending error string for errno and terminating process */
|
jbe@0
|
685 static void moonbr_child_log_errno_fatal(const char *message) {
|
jbe@0
|
686 moonbr_child_log_errno(message);
|
jbe@0
|
687 exit(1);
|
jbe@0
|
688 }
|
jbe@0
|
689
|
jbe@0
|
690 /* Receives a control message consisting of one character plus an optional file descriptor from parent process */
|
jbe@0
|
691 static void moonbr_child_receive_control_message(int socketfd, char *status, int *fd) {
|
jbe@0
|
692 struct iovec iovector = { .iov_base = status, .iov_len = 1 }; /* reference to status byte variable */
|
jbe@0
|
693 char control_message_buffer[CMSG_SPACE(sizeof(int))] = {0, }; /* used to receive file descriptor */
|
jbe@0
|
694 struct msghdr message = { /* data structure passed to recvmsg() call */
|
jbe@0
|
695 .msg_iov = &iovector,
|
jbe@0
|
696 .msg_iovlen = 1,
|
jbe@0
|
697 .msg_control = control_message_buffer,
|
jbe@0
|
698 .msg_controllen = CMSG_SPACE(sizeof(int))
|
jbe@0
|
699 };
|
jbe@0
|
700 {
|
jbe@0
|
701 int received;
|
jbe@0
|
702 while ((received = recvmsg(socketfd, &message, MSG_CMSG_CLOEXEC)) < 0) {
|
jbe@0
|
703 if (errno != EINTR) {
|
jbe@0
|
704 moonbr_child_log_errno_fatal("Error while trying to receive connection socket from parent process");
|
jbe@0
|
705 }
|
jbe@0
|
706 }
|
jbe@0
|
707 if (!received) {
|
jbe@0
|
708 moonbr_child_log_fatal("Unexpected EOF while trying to receive connection socket from parent process");
|
jbe@0
|
709 }
|
jbe@0
|
710 }
|
jbe@0
|
711 {
|
jbe@0
|
712 struct cmsghdr *control_message = CMSG_FIRSTHDR(&message);
|
jbe@0
|
713 if (control_message) {
|
jbe@0
|
714 if (control_message->cmsg_level != SOL_SOCKET) {
|
jbe@0
|
715 moonbr_child_log_fatal("Received control message with cmsg_level not equal to SOL_SOCKET");
|
jbe@0
|
716 }
|
jbe@0
|
717 if (control_message->cmsg_type != SCM_RIGHTS) {
|
jbe@0
|
718 moonbr_child_log_fatal("Received control message with cmsg_type not equal to SCM_RIGHTS");
|
jbe@0
|
719 }
|
jbe@18
|
720 memcpy(fd, CMSG_DATA(control_message), sizeof(int));
|
jbe@0
|
721 } else {
|
jbe@0
|
722 *fd = -1;
|
jbe@0
|
723 }
|
jbe@0
|
724 }
|
jbe@0
|
725 }
|
jbe@0
|
726
|
jbe@0
|
727 /* Receives a pointer from parent process */
|
jbe@0
|
728 static void *moonbr_child_receive_pointer(int socketfd) {
|
jbe@0
|
729 char buf[sizeof(void *)];
|
jbe@0
|
730 char *pos = buf;
|
jbe@0
|
731 int len = sizeof(void *);
|
jbe@0
|
732 ssize_t bytes_read;
|
jbe@0
|
733 while (len) {
|
jbe@0
|
734 bytes_read = recv(socketfd, pos, len, 0);
|
jbe@0
|
735 if (bytes_read > 0) {
|
jbe@0
|
736 pos += bytes_read;
|
jbe@0
|
737 len -= bytes_read;
|
jbe@0
|
738 } else if (!bytes_read) {
|
jbe@0
|
739 moonbr_child_log_fatal("Unexpected EOF while trying to receive memory pointer from parent process");
|
jbe@0
|
740 } else if (errno != EINTR) {
|
jbe@0
|
741 moonbr_child_log_errno_fatal("Error while trying to receive memory pointer from parent process");
|
jbe@0
|
742 }
|
jbe@0
|
743 }
|
jbe@18
|
744 {
|
jbe@18
|
745 void *ptr; /* avoid breaking strict-aliasing rules */
|
jbe@18
|
746 memcpy(&ptr, buf, sizeof(void *));
|
jbe@18
|
747 return ptr;
|
jbe@18
|
748 }
|
jbe@0
|
749 }
|
jbe@0
|
750
|
jbe@0
|
751 /* Main function of child process to be called after fork() and file descriptor rearrangement */
|
jbe@0
|
752 void moonbr_child_run(struct moonbr_pool *pool, lua_State *L) {
|
jbe@0
|
753 char controlmsg;
|
jbe@88
|
754 int fd;
|
jbe@0
|
755 struct itimerval notimer = { { 0, }, { 0, } };
|
jbe@0
|
756 lua_rawgetp(L, LUA_REGISTRYINDEX, moonbr_luakey_prepare_func(pool));
|
jbe@0
|
757 if (lua_isnil(L, -1)) lua_pop(L, 1);
|
jbe@0
|
758 else if (lua_pcall(L, 0, 0, 1)) {
|
jbe@0
|
759 fprintf(stderr, "Error in \"prepare\" function: %s\n", lua_tostring(L, -1));
|
jbe@0
|
760 exit(1);
|
jbe@0
|
761 }
|
jbe@0
|
762 while (1) {
|
jbe@0
|
763 struct moonbr_listener *listener;
|
jbe@0
|
764 if (setitimer(ITIMER_REAL, ¬imer, NULL)) {
|
jbe@0
|
765 moonbr_child_log_errno_fatal("Could not reset ITIMER_REAL via setitimer()");
|
jbe@0
|
766 }
|
jbe@0
|
767 controlmsg = MOONBR_STATUS_IDLE;
|
jbe@0
|
768 if (write(MOONBR_FD_CONTROL, &controlmsg, 1) <= 0) {
|
jbe@0
|
769 moonbr_child_log_errno_fatal("Error while sending ready message to parent process");
|
jbe@0
|
770 }
|
jbe@88
|
771 moonbr_child_receive_control_message(MOONBR_FD_CONTROL, &controlmsg, &fd);
|
jbe@0
|
772 if (!(
|
jbe@124
|
773 (controlmsg == MOONBR_COMMAND_TERMINATE && fd == -1) ||
|
jbe@124
|
774 (controlmsg == MOONBR_COMMAND_CONNECT)
|
jbe@0
|
775 )) {
|
jbe@0
|
776 moonbr_child_log_fatal("Received illegal control message from parent process");
|
jbe@0
|
777 }
|
jbe@0
|
778 if (controlmsg == MOONBR_COMMAND_TERMINATE) break;
|
jbe@0
|
779 listener = moonbr_child_receive_pointer(MOONBR_FD_CONTROL);
|
jbe@127
|
780 if (
|
jbe@127
|
781 listener->proto != MOONBR_PROTO_LOCAL &&
|
jbe@127
|
782 listener->proto != MOONBR_PROTO_TCP &&
|
jbe@127
|
783 fd >= 0
|
jbe@127
|
784 ) {
|
jbe@124
|
785 moonbr_child_log_fatal("Received unexpected file descriptor from parent process");
|
jbe@127
|
786 } else if (
|
jbe@127
|
787 listener->proto != MOONBR_PROTO_MAIN &&
|
jbe@127
|
788 listener->proto != MOONBR_PROTO_INTERVAL &&
|
jbe@127
|
789 fd < 0
|
jbe@127
|
790 ) {
|
jbe@124
|
791 moonbr_child_log_fatal("Missing file descriptor from parent process");
|
jbe@124
|
792 }
|
jbe@119
|
793 if (fd >= 0) moonbr_io_pushhandle(L, fd);
|
jbe@0
|
794 lua_rawgetp(L, LUA_REGISTRYINDEX, moonbr_luakey_connect_func(pool));
|
jbe@119
|
795 if (fd < 0) {
|
jbe@0
|
796 lua_newtable(L);
|
jbe@0
|
797 lua_pushstring(L,
|
jbe@125
|
798 listener->type_specific.interval.name ?
|
jbe@125
|
799 listener->type_specific.interval.name : ""
|
jbe@0
|
800 );
|
jbe@0
|
801 lua_setfield(L, -2, "interval");
|
jbe@0
|
802 } else {
|
jbe@88
|
803 lua_pushvalue(L, -2);
|
jbe@0
|
804 }
|
jbe@0
|
805 if (lua_pcall(L, 1, 1, 1)) {
|
jbe@0
|
806 fprintf(stderr, "Error in \"connect\" function: %s\n", lua_tostring(L, -1));
|
jbe@0
|
807 exit(1);
|
jbe@0
|
808 }
|
jbe@119
|
809 if (fd >= 0) moonbr_io_closehandle(L, -2, 0); /* attemt clean close */
|
jbe@0
|
810 if (lua_type(L, -1) != LUA_TBOOLEAN || !lua_toboolean(L, -1)) break;
|
jbe@0
|
811 #ifdef MOONBR_LUA_PANIC_BUG_WORKAROUND
|
jbe@0
|
812 lua_settop(L, 2);
|
jbe@0
|
813 #else
|
jbe@0
|
814 lua_settop(L, 1);
|
jbe@0
|
815 #endif
|
jbe@0
|
816 }
|
jbe@0
|
817 controlmsg = MOONBR_STATUS_GOODBYE;
|
jbe@0
|
818 if (write(MOONBR_FD_CONTROL, &controlmsg, 1) <= 0) {
|
jbe@0
|
819 moonbr_child_log_errno_fatal("Error while sending goodbye message to parent process");
|
jbe@0
|
820 }
|
jbe@0
|
821 if (close(MOONBR_FD_CONTROL) && errno != EINTR) {
|
jbe@0
|
822 moonbr_child_log_errno("Error while closing control socket");
|
jbe@0
|
823 }
|
jbe@0
|
824 lua_rawgetp(L, LUA_REGISTRYINDEX, moonbr_luakey_finish_func(pool));
|
jbe@0
|
825 if (lua_isnil(L, -1)) lua_pop(L, 1);
|
jbe@0
|
826 else if (lua_pcall(L, 0, 0, 1)) {
|
jbe@0
|
827 fprintf(stderr, "Error in \"finish\" function: %s\n", lua_tostring(L, -1));
|
jbe@0
|
828 exit(1);
|
jbe@0
|
829 }
|
jbe@0
|
830 lua_close(L);
|
jbe@0
|
831 exit(0);
|
jbe@0
|
832 }
|
jbe@0
|
833
|
jbe@0
|
834
|
jbe@0
|
835 /*** Functions to spawn child process ***/
|
jbe@0
|
836
|
jbe@0
|
837 /* Helper function to send an error message to a file descriptor (not needing a file stream) */
|
jbe@0
|
838 static void moonbr_child_emergency_print(int fd, char *message) {
|
jbe@0
|
839 size_t len = strlen(message);
|
jbe@0
|
840 ssize_t written;
|
jbe@0
|
841 while (len) {
|
jbe@0
|
842 written = write(fd, message, len);
|
jbe@0
|
843 if (written > 0) {
|
jbe@0
|
844 message += written;
|
jbe@0
|
845 len -= written;
|
jbe@0
|
846 } else {
|
jbe@0
|
847 if (written != -1 || errno != EINTR) break;
|
jbe@0
|
848 }
|
jbe@0
|
849 }
|
jbe@0
|
850 }
|
jbe@0
|
851
|
jbe@0
|
852 /* Helper function to send an error message plus a text for errno to a file descriptor and terminate the process */
|
jbe@0
|
853 static void moonbr_child_emergency_error(int fd, char *message) {
|
jbe@0
|
854 int errno2 = errno;
|
jbe@0
|
855 moonbr_child_emergency_print(fd, message);
|
jbe@0
|
856 moonbr_child_emergency_print(fd, ": ");
|
jbe@0
|
857 moonbr_child_emergency_print(fd, strerror(errno2));
|
jbe@0
|
858 moonbr_child_emergency_print(fd, "\n");
|
jbe@0
|
859 exit(1);
|
jbe@0
|
860 }
|
jbe@0
|
861
|
jbe@0
|
862 /* Creates a child process and (in case of success) registers it in the 'struct moonbr_pool' structure */
|
jbe@0
|
863 static int moonbr_create_worker(struct moonbr_pool *pool, lua_State *L) {
|
jbe@0
|
864 struct moonbr_worker *worker;
|
jbe@0
|
865 worker = calloc(1, sizeof(struct moonbr_worker));
|
jbe@0
|
866 if (!worker) {
|
jbe@0
|
867 moonbr_log(LOG_CRIT, "Memory allocation error");
|
jbe@0
|
868 return -1;
|
jbe@0
|
869 }
|
jbe@0
|
870 worker->pool = pool;
|
jbe@0
|
871 {
|
jbe@0
|
872 int controlfds[2];
|
jbe@0
|
873 int errorfds[2];
|
jbe@0
|
874 if (socketpair(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0, controlfds)) {
|
jbe@0
|
875 moonbr_log(LOG_ERR, "Could not create control socket pair for communcation with child process: %s", strerror(errno));
|
jbe@0
|
876 free(worker);
|
jbe@0
|
877 return -1;
|
jbe@0
|
878 }
|
jbe@0
|
879 if (socketpair(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0, errorfds)) {
|
jbe@0
|
880 moonbr_log(LOG_ERR, "Could not create socket pair to redirect stderr of child process: %s", strerror(errno));
|
jbe@0
|
881 close(controlfds[0]);
|
jbe@0
|
882 close(controlfds[1]);
|
jbe@0
|
883 free(worker);
|
jbe@0
|
884 return -1;
|
jbe@0
|
885 }
|
jbe@0
|
886 if (moonbr_logfile && fflush(moonbr_logfile)) {
|
jbe@0
|
887 moonbr_log(LOG_CRIT, "Could not flush log file prior to forking: %s", strerror(errno));
|
jbe@0
|
888 moonbr_terminate_error();
|
jbe@0
|
889 }
|
jbe@0
|
890 worker->pid = fork();
|
jbe@0
|
891 if (worker->pid == -1) {
|
jbe@0
|
892 moonbr_log(LOG_ERR, "Could not fork: %s", strerror(errno));
|
jbe@0
|
893 close(controlfds[0]);
|
jbe@0
|
894 close(controlfds[1]);
|
jbe@0
|
895 close(errorfds[0]);
|
jbe@0
|
896 close(errorfds[1]);
|
jbe@0
|
897 free(worker);
|
jbe@0
|
898 return -1;
|
jbe@0
|
899 } else if (!worker->pid) {
|
jbe@0
|
900 moonbr_pstate = MOONBR_PSTATE_FORKED;
|
jbe@0
|
901 #ifdef MOONBR_LUA_PANIC_BUG_WORKAROUND
|
jbe@0
|
902 lua_pushliteral(L, "Failed to pass error message due to bug in Lua panic handler (hint: not enough memory?)");
|
jbe@0
|
903 #endif
|
jbe@0
|
904 moonbr_memory_limit = pool->memory_limit;
|
jbe@0
|
905 if (moonbr_pidfh && pidfile_close(moonbr_pidfh)) {
|
jbe@0
|
906 moonbr_child_emergency_error(errorfds[1], "Could not close PID file in forked child process");
|
jbe@0
|
907 }
|
jbe@0
|
908 if (moonbr_logfile && moonbr_logfile != stderr && fclose(moonbr_logfile)) {
|
jbe@0
|
909 moonbr_child_emergency_error(errorfds[1], "Could not close log file in forked child process");
|
jbe@0
|
910 }
|
jbe@0
|
911 if (dup2(errorfds[1], MOONBR_FD_STDERR) == -1) {
|
jbe@0
|
912 moonbr_child_emergency_error(errorfds[1], "Could not duplicate socket to stderr file descriptor");
|
jbe@0
|
913 }
|
jbe@0
|
914 if (dup2(controlfds[1], MOONBR_FD_CONTROL) == -1) {
|
jbe@0
|
915 moonbr_child_emergency_error(errorfds[1], "Could not duplicate control socket");
|
jbe@0
|
916 }
|
jbe@0
|
917 closefrom(MOONBR_FD_END);
|
jbe@0
|
918 moonbr_child_run(pool, L);
|
jbe@0
|
919 }
|
jbe@0
|
920 if (moonbr_stat) {
|
jbe@0
|
921 moonbr_log(LOG_INFO, "Created new worker in pool #%i with PID %i", worker->pool->poolnum, (int)worker->pid);
|
jbe@0
|
922 }
|
jbe@0
|
923 worker->controlfd = controlfds[0];
|
jbe@0
|
924 worker->errorfd = errorfds[0];
|
jbe@0
|
925 if (close(controlfds[1]) && errno != EINTR) {
|
jbe@0
|
926 moonbr_log(LOG_CRIT, "Could not close opposite end of control file descriptor after forking");
|
jbe@0
|
927 moonbr_terminate_error();
|
jbe@0
|
928 }
|
jbe@0
|
929 if (close(errorfds[1]) && errno != EINTR) {
|
jbe@0
|
930 moonbr_log(LOG_CRIT, "Could not close opposite end of control file descriptor after forking");
|
jbe@0
|
931 moonbr_terminate_error();
|
jbe@0
|
932 }
|
jbe@0
|
933 }
|
jbe@0
|
934 worker->prev_worker = pool->last_worker;
|
jbe@0
|
935 if (worker->prev_worker) worker->prev_worker->next_worker = worker;
|
jbe@0
|
936 else pool->first_worker = worker;
|
jbe@0
|
937 pool->last_worker = worker;
|
jbe@0
|
938 pool->unassigned_worker_count++;
|
jbe@0
|
939 pool->total_worker_count++;
|
jbe@0
|
940 pool->worker_count_stat = 1;
|
jbe@0
|
941 moonbr_poll_refresh_needed = 1;
|
jbe@0
|
942 return 0; /* return zero only in case of success */
|
jbe@0
|
943 }
|
jbe@0
|
944
|
jbe@0
|
945
|
jbe@0
|
946 /*** Functions for queues of 'struct moonbr_listener' ***/
|
jbe@0
|
947
|
jbe@0
|
948 /* Appends a 'struct moonbr_listener' to the queue of idle listeners and registers it for poll() */
|
jbe@0
|
949 static void moonbr_add_idle_listener(struct moonbr_listener *listener) {
|
jbe@0
|
950 listener->prev_listener = listener->pool->last_idle_listener;
|
jbe@0
|
951 if (listener->prev_listener) listener->prev_listener->next_listener = listener;
|
jbe@0
|
952 else listener->pool->first_idle_listener = listener;
|
jbe@0
|
953 listener->pool->last_idle_listener = listener;
|
jbe@0
|
954 if (listener->pollidx != -1) moonbr_poll_fds[listener->pollidx].events |= POLLIN;
|
jbe@0
|
955 }
|
jbe@0
|
956
|
jbe@0
|
957 /* Removes a 'struct moonbr_listener' from the queue of idle listeners and unregisters it from poll() */
|
jbe@0
|
958 static void moonbr_remove_idle_listener(struct moonbr_listener *listener) {
|
jbe@0
|
959 if (listener->prev_listener) listener->prev_listener->next_listener = listener->next_listener;
|
jbe@0
|
960 else listener->pool->first_idle_listener = listener->next_listener;
|
jbe@0
|
961 if (listener->next_listener) listener->next_listener->prev_listener = listener->prev_listener;
|
jbe@0
|
962 else listener->pool->last_idle_listener = listener->prev_listener;
|
jbe@0
|
963 listener->prev_listener = NULL;
|
jbe@0
|
964 listener->next_listener = NULL;
|
jbe@0
|
965 if (listener->pollidx != -1) moonbr_poll_fds[listener->pollidx].events &= ~POLLIN;
|
jbe@0
|
966 }
|
jbe@0
|
967
|
jbe@0
|
968 /* Adds a listener to the queue of connected listeners (i.e. waiting to have their incoming connection accepted) */
|
jbe@0
|
969 static void moonbr_add_connected_listener(struct moonbr_listener *listener) {
|
jbe@0
|
970 listener->prev_listener = listener->pool->last_connected_listener;
|
jbe@0
|
971 if (listener->prev_listener) listener->prev_listener->next_listener = listener;
|
jbe@0
|
972 else listener->pool->first_connected_listener = listener;
|
jbe@0
|
973 listener->pool->last_connected_listener = listener;
|
jbe@0
|
974 }
|
jbe@0
|
975
|
jbe@0
|
976 /* Removes and returns the first connected listener in the queue */
|
jbe@0
|
977 static struct moonbr_listener *moonbr_pop_connected_listener(struct moonbr_pool *pool) {
|
jbe@0
|
978 struct moonbr_listener *listener = pool->first_connected_listener;
|
jbe@0
|
979 listener->pool->first_connected_listener = listener->next_listener;
|
jbe@0
|
980 if (listener->pool->first_connected_listener) listener->pool->first_connected_listener->prev_listener = NULL;
|
jbe@0
|
981 else listener->pool->last_connected_listener = NULL;
|
jbe@0
|
982 listener->next_listener = NULL;
|
jbe@0
|
983 return listener;
|
jbe@0
|
984 }
|
jbe@0
|
985
|
jbe@0
|
986
|
jbe@0
|
987 /*** Functions to handle polling ***/
|
jbe@0
|
988
|
jbe@0
|
989 /* Returns an index to a new initialized entry in moonbr_poll_fds[] */
|
jbe@0
|
990 int moonbr_poll_fds_nextindex() {
|
jbe@0
|
991 if (moonbr_poll_fds_count >= moonbr_poll_fds_bufsize) {
|
jbe@0
|
992 if (moonbr_poll_fds_bufsize) moonbr_poll_fds_bufsize *= 2;
|
jbe@0
|
993 else moonbr_poll_fds_bufsize = 1;
|
jbe@0
|
994 moonbr_poll_fds = realloc(
|
jbe@0
|
995 moonbr_poll_fds, moonbr_poll_fds_bufsize * sizeof(struct pollfd)
|
jbe@0
|
996 );
|
jbe@0
|
997 if (!moonbr_poll_fds) {
|
jbe@0
|
998 moonbr_log(LOG_CRIT, "Memory allocation error");
|
jbe@0
|
999 moonbr_terminate_error();
|
jbe@0
|
1000 }
|
jbe@0
|
1001 }
|
jbe@0
|
1002 moonbr_poll_fds[moonbr_poll_fds_count] = (struct pollfd){0, };
|
jbe@0
|
1003 return moonbr_poll_fds_count++;
|
jbe@0
|
1004 }
|
jbe@0
|
1005
|
jbe@0
|
1006 /* Returns an index to a new initialized entry in moonbr_poll_workers[] */
|
jbe@0
|
1007 int moonbr_poll_workers_nextindex() {
|
jbe@0
|
1008 if (moonbr_poll_worker_count >= moonbr_poll_workers_bufsize) {
|
jbe@0
|
1009 if (moonbr_poll_workers_bufsize) moonbr_poll_workers_bufsize *= 2;
|
jbe@0
|
1010 else moonbr_poll_workers_bufsize = 1;
|
jbe@0
|
1011 moonbr_poll_workers = realloc(
|
jbe@0
|
1012 moonbr_poll_workers, moonbr_poll_workers_bufsize * sizeof(struct moonbr_poll_worker)
|
jbe@0
|
1013 );
|
jbe@0
|
1014 if (!moonbr_poll_workers) {
|
jbe@0
|
1015 moonbr_log(LOG_CRIT, "Memory allocation error");
|
jbe@0
|
1016 moonbr_terminate_error();
|
jbe@0
|
1017 }
|
jbe@0
|
1018 }
|
jbe@0
|
1019 moonbr_poll_workers[moonbr_poll_worker_count] = (struct moonbr_poll_worker){0, };
|
jbe@0
|
1020 return moonbr_poll_worker_count++;
|
jbe@0
|
1021 }
|
jbe@0
|
1022
|
jbe@0
|
1023 /* Queues all listeners as idle, and initializes static part of moonbr_poll_fds[], which is passed to poll() */
|
jbe@0
|
1024 static void moonbr_poll_init() {
|
jbe@0
|
1025 if (socketpair(
|
jbe@0
|
1026 PF_LOCAL,
|
jbe@0
|
1027 SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK,
|
jbe@0
|
1028 0,
|
jbe@0
|
1029 moonbr_poll_signalfds
|
jbe@0
|
1030 )) {
|
jbe@0
|
1031 moonbr_log(LOG_CRIT, "Could not create socket pair for signal delivery during polling: %s", strerror(errno));
|
jbe@0
|
1032 moonbr_terminate_error();
|
jbe@0
|
1033 }
|
jbe@0
|
1034 {
|
jbe@0
|
1035 int j = moonbr_poll_fds_nextindex();
|
jbe@0
|
1036 struct pollfd *pollfd = &moonbr_poll_fds[j];
|
jbe@0
|
1037 pollfd->fd = moonbr_poll_signalfd_read;
|
jbe@0
|
1038 pollfd->events = POLLIN;
|
jbe@0
|
1039 }
|
jbe@0
|
1040 {
|
jbe@0
|
1041 struct moonbr_pool *pool;
|
jbe@0
|
1042 for (pool=moonbr_first_pool; pool; pool=pool->next_pool) {
|
jbe@0
|
1043 int i;
|
jbe@0
|
1044 for (i=0; i<pool->listener_count; i++) {
|
jbe@0
|
1045 struct moonbr_listener *listener = &pool->listener[i];
|
jbe@0
|
1046 if (listener->listenfd != -1) {
|
jbe@0
|
1047 int j = moonbr_poll_fds_nextindex();
|
jbe@0
|
1048 listener->pollidx = j;
|
jbe@0
|
1049 moonbr_poll_fds[j].fd = listener->listenfd;
|
jbe@0
|
1050 }
|
jbe@0
|
1051 moonbr_add_idle_listener(listener);
|
jbe@0
|
1052 }
|
jbe@0
|
1053 }
|
jbe@0
|
1054 }
|
jbe@0
|
1055 moonbr_poll_fds_static_count = moonbr_poll_fds_count; /* remember size of static part of array */
|
jbe@0
|
1056 }
|
jbe@0
|
1057
|
jbe@0
|
1058 /* Disables polling of all listeners (required for clean shutdown) */
|
jbe@0
|
1059 static void moonbr_poll_shutdown() {
|
jbe@0
|
1060 int i;
|
jbe@0
|
1061 for (i=1; i<moonbr_poll_fds_static_count; i++) {
|
jbe@0
|
1062 moonbr_poll_fds[i].fd = -1;
|
jbe@0
|
1063 }
|
jbe@0
|
1064 }
|
jbe@0
|
1065
|
jbe@0
|
1066 /* (Re)builds dynamic part of moonbr_poll_fds[] array, and (re)builds moonbr_poll_workers[] array */
|
jbe@0
|
1067 static void moonbr_poll_refresh() {
|
jbe@0
|
1068 moonbr_poll_refresh_needed = 0;
|
jbe@0
|
1069 moonbr_poll_fds_count = moonbr_poll_fds_static_count;
|
jbe@0
|
1070 moonbr_poll_worker_count = 0;
|
jbe@0
|
1071 {
|
jbe@0
|
1072 struct moonbr_pool *pool;
|
jbe@0
|
1073 for (pool=moonbr_first_pool; pool; pool=pool->next_pool) {
|
jbe@0
|
1074 struct moonbr_worker *worker;
|
jbe@0
|
1075 for (worker=pool->first_worker; worker; worker=worker->next_worker) {
|
jbe@0
|
1076 if (worker->controlfd != -1) {
|
jbe@0
|
1077 int j = moonbr_poll_fds_nextindex();
|
jbe@0
|
1078 int k = moonbr_poll_workers_nextindex();
|
jbe@0
|
1079 struct pollfd *pollfd = &moonbr_poll_fds[j];
|
jbe@0
|
1080 struct moonbr_poll_worker *poll_worker = &moonbr_poll_workers[k];
|
jbe@0
|
1081 pollfd->fd = worker->controlfd;
|
jbe@0
|
1082 pollfd->events = POLLIN;
|
jbe@0
|
1083 poll_worker->channel = MOONBR_POLL_WORKER_CONTROLCHANNEL;
|
jbe@0
|
1084 poll_worker->worker = worker;
|
jbe@0
|
1085 }
|
jbe@0
|
1086 if (worker->errorfd != -1) {
|
jbe@0
|
1087 int j = moonbr_poll_fds_nextindex();
|
jbe@0
|
1088 int k = moonbr_poll_workers_nextindex();
|
jbe@0
|
1089 struct pollfd *pollfd = &moonbr_poll_fds[j];
|
jbe@0
|
1090 struct moonbr_poll_worker *poll_worker = &moonbr_poll_workers[k];
|
jbe@0
|
1091 pollfd->fd = worker->errorfd;
|
jbe@0
|
1092 pollfd->events = POLLIN;
|
jbe@0
|
1093 poll_worker->channel = MOONBR_POLL_WORKER_ERRORCHANNEL;
|
jbe@0
|
1094 poll_worker->worker = worker;
|
jbe@0
|
1095 }
|
jbe@0
|
1096 }
|
jbe@0
|
1097 }
|
jbe@0
|
1098 }
|
jbe@0
|
1099 }
|
jbe@0
|
1100
|
jbe@0
|
1101 /* resets socket and 'revents' field of moonbr_poll_fds[] for signal delivery just before poll() is called */
|
jbe@0
|
1102 static void moonbr_poll_reset_signal() {
|
jbe@0
|
1103 ssize_t readcount;
|
jbe@0
|
1104 char buf[1];
|
jbe@0
|
1105 moonbr_poll_fds[0].revents = 0;
|
jbe@0
|
1106 while ((readcount = read(moonbr_poll_signalfd_read, buf, 1)) < 0) {
|
jbe@0
|
1107 if (errno == EAGAIN) break;
|
jbe@0
|
1108 if (errno != EINTR) {
|
jbe@0
|
1109 moonbr_log(LOG_CRIT, "Error while reading from signal delivery socket: %s", strerror(errno));
|
jbe@0
|
1110 moonbr_terminate_error();
|
jbe@0
|
1111 }
|
jbe@0
|
1112 }
|
jbe@0
|
1113 if (!readcount) {
|
jbe@0
|
1114 moonbr_log(LOG_CRIT, "Unexpected EOF when reading from signal delivery socket: %s", strerror(errno));
|
jbe@0
|
1115 moonbr_terminate_error();
|
jbe@0
|
1116 }
|
jbe@0
|
1117 }
|
jbe@0
|
1118
|
jbe@0
|
1119
|
jbe@0
|
1120 /*** Shutdown initiation ***/
|
jbe@0
|
1121
|
jbe@0
|
1122 /* Sets global variable 'moonbr_shutdown_in_progress', closes listeners, and demands worker termination */
|
jbe@0
|
1123 static void moonbr_initiate_shutdown() {
|
jbe@0
|
1124 struct moonbr_pool *pool;
|
jbe@0
|
1125 int i;
|
jbe@0
|
1126 if (moonbr_shutdown_in_progress) {
|
jbe@0
|
1127 moonbr_log(LOG_NOTICE, "Shutdown already in progress");
|
jbe@0
|
1128 return;
|
jbe@0
|
1129 }
|
jbe@0
|
1130 moonbr_shutdown_in_progress = 1;
|
jbe@0
|
1131 moonbr_log(LOG_NOTICE, "Initiate shutdown");
|
jbe@0
|
1132 for (pool = moonbr_first_pool; pool; pool = pool->next_pool) {
|
jbe@0
|
1133 for (i=0; i<pool->listener_count; i++) {
|
jbe@0
|
1134 struct moonbr_listener *listener = &pool->listener[i];
|
jbe@0
|
1135 if (listener->listenfd != -1) {
|
jbe@0
|
1136 if (close(listener->listenfd) && errno != EINTR) {
|
jbe@0
|
1137 moonbr_log(LOG_CRIT, "Could not close listening socket: %s", strerror(errno));
|
jbe@0
|
1138 moonbr_terminate_error();
|
jbe@0
|
1139 }
|
jbe@0
|
1140 }
|
jbe@0
|
1141 }
|
jbe@0
|
1142 }
|
jbe@0
|
1143 moonbr_poll_shutdown(); /* avoids loops due to error condition when polling closed listeners */
|
jbe@0
|
1144 }
|
jbe@0
|
1145
|
jbe@0
|
1146
|
jbe@128
|
1147 /*** Functions to handle previously created 'struct moonbr_worker' structures ***/
|
jbe@128
|
1148
|
jbe@128
|
1149 #define moonbr_try_destroy_worker_stat(str, field) \
|
jbe@128
|
1150 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
|
1151
|
jbe@128
|
1152 /* Destroys a worker structure if socket connections have been closed and child process has terminated */
|
jbe@128
|
1153 static int moonbr_try_destroy_worker(struct moonbr_worker *worker) {
|
jbe@128
|
1154 if (worker->controlfd != -1 || worker->errorfd != -1) return MOONBR_DESTROY_NONE;
|
jbe@128
|
1155 {
|
jbe@128
|
1156 int childstatus;
|
jbe@128
|
1157 struct rusage childusage;
|
jbe@128
|
1158 {
|
jbe@128
|
1159 pid_t waitedpid;
|
jbe@128
|
1160 while (
|
jbe@128
|
1161 (waitedpid = wait4(worker->pid, &childstatus, WNOHANG, &childusage)) == -1
|
jbe@128
|
1162 ) {
|
jbe@128
|
1163 if (errno != EINTR) {
|
jbe@128
|
1164 moonbr_log(LOG_CRIT, "Error in wait4() call: %s", strerror(errno));
|
jbe@128
|
1165 moonbr_terminate_error();
|
jbe@128
|
1166 }
|
jbe@128
|
1167 }
|
jbe@128
|
1168 if (!waitedpid) return 0; /* return 0 if worker couldn't be destroyed */
|
jbe@128
|
1169 if (waitedpid != worker->pid) {
|
jbe@128
|
1170 moonbr_log(LOG_CRIT, "Wrong PID returned by wait4() call");
|
jbe@128
|
1171 moonbr_terminate_error();
|
jbe@128
|
1172 }
|
jbe@128
|
1173 }
|
jbe@128
|
1174 if (WIFEXITED(childstatus)) {
|
jbe@128
|
1175 if (WEXITSTATUS(childstatus) || moonbr_stat) {
|
jbe@128
|
1176 moonbr_log(
|
jbe@128
|
1177 WEXITSTATUS(childstatus) ? LOG_WARNING : LOG_INFO,
|
jbe@128
|
1178 "Child process in pool #%i with PID %i returned with exit code %i", worker->pool->poolnum, (int)worker->pid, WEXITSTATUS(childstatus)
|
jbe@128
|
1179 );
|
jbe@128
|
1180 }
|
jbe@128
|
1181 } else if (WIFSIGNALED(childstatus)) {
|
jbe@128
|
1182 if (WCOREDUMP(childstatus)) {
|
jbe@128
|
1183 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
|
1184 } else if (WTERMSIG(childstatus) == SIGALRM) {
|
jbe@128
|
1185 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
|
1186 } else {
|
jbe@128
|
1187 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
|
1188 }
|
jbe@128
|
1189 } else {
|
jbe@128
|
1190 moonbr_log(LOG_CRIT, "Illegal exit status from child process in pool #%i with PID %i", worker->pool->poolnum, (int)worker->pid);
|
jbe@128
|
1191 moonbr_terminate_error();
|
jbe@128
|
1192 }
|
jbe@128
|
1193 if (moonbr_stat) {
|
jbe@128
|
1194 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
|
1195 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
|
1196 moonbr_try_destroy_worker_stat("max resident set size", ru_maxrss);
|
jbe@128
|
1197 moonbr_try_destroy_worker_stat("integral shared memory size", ru_ixrss);
|
jbe@128
|
1198 moonbr_try_destroy_worker_stat("integral unshared data", ru_idrss);
|
jbe@128
|
1199 moonbr_try_destroy_worker_stat("integral unshared stack", ru_isrss);
|
jbe@128
|
1200 moonbr_try_destroy_worker_stat("page replaims", ru_minflt);
|
jbe@128
|
1201 moonbr_try_destroy_worker_stat("page faults", ru_majflt);
|
jbe@128
|
1202 moonbr_try_destroy_worker_stat("swaps", ru_nswap);
|
jbe@128
|
1203 moonbr_try_destroy_worker_stat("block input operations", ru_inblock);
|
jbe@128
|
1204 moonbr_try_destroy_worker_stat("block output operations", ru_oublock);
|
jbe@128
|
1205 moonbr_try_destroy_worker_stat("messages sent", ru_msgsnd);
|
jbe@128
|
1206 moonbr_try_destroy_worker_stat("messages received", ru_msgrcv);
|
jbe@128
|
1207 moonbr_try_destroy_worker_stat("signals received", ru_nsignals);
|
jbe@128
|
1208 moonbr_try_destroy_worker_stat("voluntary context switches", ru_nvcsw);
|
jbe@128
|
1209 moonbr_try_destroy_worker_stat("involuntary context switches", ru_nivcsw);
|
jbe@128
|
1210 }
|
jbe@128
|
1211 }
|
jbe@128
|
1212 {
|
jbe@128
|
1213 int retval = (
|
jbe@128
|
1214 (worker->idle || worker->assigned) ?
|
jbe@128
|
1215 MOONBR_DESTROY_IDLE_OR_ASSIGNED :
|
jbe@128
|
1216 MOONBR_DESTROY_PREPARE
|
jbe@128
|
1217 );
|
jbe@128
|
1218 if (worker->main) moonbr_initiate_shutdown();
|
jbe@128
|
1219 if (worker->prev_worker) worker->prev_worker->next_worker = worker->next_worker;
|
jbe@128
|
1220 else worker->pool->first_worker = worker->next_worker;
|
jbe@128
|
1221 if (worker->next_worker) worker->next_worker->prev_worker = worker->prev_worker;
|
jbe@128
|
1222 else worker->pool->last_worker = worker->prev_worker;
|
jbe@128
|
1223 if (worker->idle) {
|
jbe@128
|
1224 if (worker->prev_idle_worker) worker->prev_idle_worker->next_idle_worker = worker->next_idle_worker;
|
jbe@128
|
1225 else worker->pool->first_idle_worker = worker->next_idle_worker;
|
jbe@128
|
1226 if (worker->next_idle_worker) worker->next_idle_worker->prev_idle_worker = worker->prev_idle_worker;
|
jbe@128
|
1227 else worker->pool->last_idle_worker = worker->prev_idle_worker;
|
jbe@128
|
1228 worker->pool->idle_worker_count--;
|
jbe@128
|
1229 }
|
jbe@128
|
1230 if (!worker->assigned) worker->pool->unassigned_worker_count--;
|
jbe@128
|
1231 worker->pool->total_worker_count--;
|
jbe@128
|
1232 worker->pool->worker_count_stat = 1;
|
jbe@128
|
1233 if (worker->errorlinebuf) free(worker->errorlinebuf);
|
jbe@128
|
1234 free(worker);
|
jbe@128
|
1235 return retval;
|
jbe@128
|
1236 }
|
jbe@128
|
1237 }
|
jbe@128
|
1238
|
jbe@128
|
1239 /* Marks a worker as idle and stores it in a queue, optionally setting 'idle_expiration' value */
|
jbe@128
|
1240 static void moonbr_add_idle_worker(struct moonbr_worker *worker) {
|
jbe@128
|
1241 worker->prev_idle_worker = worker->pool->last_idle_worker;
|
jbe@128
|
1242 if (worker->prev_idle_worker) worker->prev_idle_worker->next_idle_worker = worker;
|
jbe@128
|
1243 else worker->pool->first_idle_worker = worker;
|
jbe@128
|
1244 worker->pool->last_idle_worker = worker;
|
jbe@128
|
1245 worker->idle = 1;
|
jbe@128
|
1246 worker->pool->idle_worker_count++;
|
jbe@128
|
1247 if (worker->assigned) {
|
jbe@128
|
1248 worker->assigned = 0;
|
jbe@128
|
1249 worker->pool->unassigned_worker_count++;
|
jbe@128
|
1250 }
|
jbe@128
|
1251 worker->pool->worker_count_stat = 1;
|
jbe@128
|
1252 if (timerisset(&worker->pool->idle_timeout)) {
|
jbe@128
|
1253 struct timeval now;
|
jbe@128
|
1254 moonbr_now(&now);
|
jbe@128
|
1255 timeradd(&now, &worker->pool->idle_timeout, &worker->idle_expiration);
|
jbe@128
|
1256 }
|
jbe@128
|
1257 }
|
jbe@128
|
1258
|
jbe@128
|
1259 /* Pops a worker from the queue of idle workers (idle queue must not be empty) */
|
jbe@128
|
1260 static struct moonbr_worker *moonbr_pop_idle_worker(struct moonbr_pool *pool) {
|
jbe@128
|
1261 struct moonbr_worker *worker;
|
jbe@128
|
1262 worker = pool->first_idle_worker;
|
jbe@128
|
1263 pool->first_idle_worker = worker->next_idle_worker;
|
jbe@128
|
1264 if (pool->first_idle_worker) pool->first_idle_worker->prev_idle_worker = NULL;
|
jbe@128
|
1265 else pool->last_idle_worker = NULL;
|
jbe@128
|
1266 worker->next_idle_worker = NULL;
|
jbe@128
|
1267 worker->idle = 0;
|
jbe@128
|
1268 worker->pool->idle_worker_count--;
|
jbe@128
|
1269 worker->assigned = 1;
|
jbe@128
|
1270 worker->pool->unassigned_worker_count--;
|
jbe@128
|
1271 worker->pool->worker_count_stat = 1;
|
jbe@128
|
1272 return worker;
|
jbe@128
|
1273 }
|
jbe@128
|
1274
|
jbe@128
|
1275
|
jbe@0
|
1276 /*** Functions to communicate with child processes ***/
|
jbe@0
|
1277
|
jbe@0
|
1278 /* Tells child process to terminate */
|
jbe@0
|
1279 static void moonbr_terminate_idle_worker(struct moonbr_worker *worker) {
|
jbe@0
|
1280 moonbr_send_control_message(worker, MOONBR_COMMAND_TERMINATE, -1, NULL);
|
jbe@0
|
1281 }
|
jbe@0
|
1282
|
jbe@0
|
1283 /* Handles status messages from child process */
|
jbe@0
|
1284 static void moonbr_read_controlchannel(struct moonbr_worker *worker) {
|
jbe@0
|
1285 char controlmsg;
|
jbe@0
|
1286 {
|
jbe@0
|
1287 ssize_t bytes_read;
|
jbe@0
|
1288 while ((bytes_read = read(worker->controlfd, &controlmsg, 1)) <= 0) {
|
jbe@0
|
1289 if (bytes_read == 0 || errno == ECONNRESET) {
|
jbe@0
|
1290 moonbr_log(LOG_WARNING, "Child process in pool #%i with PID %i unexpectedly closed control socket", worker->pool->poolnum, (int)worker->pid);
|
jbe@0
|
1291 if (close(worker->controlfd) && errno != EINTR) {
|
jbe@0
|
1292 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
|
1293 moonbr_terminate_error();
|
jbe@0
|
1294 }
|
jbe@0
|
1295 worker->controlfd = -1;
|
jbe@0
|
1296 moonbr_poll_refresh_needed = 1;
|
jbe@0
|
1297 return;
|
jbe@0
|
1298 }
|
jbe@0
|
1299 if (errno != EINTR) {
|
jbe@0
|
1300 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
|
1301 moonbr_terminate_error();
|
jbe@0
|
1302 }
|
jbe@0
|
1303 }
|
jbe@0
|
1304 }
|
jbe@0
|
1305 if (worker->idle) {
|
jbe@0
|
1306 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
|
1307 moonbr_terminate_error();
|
jbe@0
|
1308 }
|
jbe@0
|
1309 if (moonbr_debug) {
|
jbe@0
|
1310 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
|
1311 }
|
jbe@0
|
1312 switch (controlmsg) {
|
jbe@0
|
1313 case MOONBR_STATUS_IDLE:
|
jbe@0
|
1314 if (moonbr_stat) {
|
jbe@0
|
1315 moonbr_log(LOG_INFO, "Child process in pool #%i with PID %i reports as idle", worker->pool->poolnum, (int)worker->pid);
|
jbe@0
|
1316 }
|
jbe@0
|
1317 moonbr_add_idle_worker(worker);
|
jbe@0
|
1318 break;
|
jbe@0
|
1319 case MOONBR_STATUS_GOODBYE:
|
jbe@0
|
1320 if (moonbr_stat) {
|
jbe@0
|
1321 moonbr_log(LOG_INFO, "Child process in pool #%i with PID %i announced termination", worker->pool->poolnum, (int)worker->pid);
|
jbe@0
|
1322 }
|
jbe@0
|
1323 if (close(worker->controlfd) && errno != EINTR) {
|
jbe@0
|
1324 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
|
1325 moonbr_terminate_error();
|
jbe@0
|
1326 }
|
jbe@0
|
1327 worker->controlfd = -1;
|
jbe@0
|
1328 moonbr_poll_refresh_needed = 1;
|
jbe@0
|
1329 break;
|
jbe@0
|
1330 default:
|
jbe@0
|
1331 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
|
1332 moonbr_terminate_error();
|
jbe@0
|
1333 }
|
jbe@0
|
1334 }
|
jbe@0
|
1335
|
jbe@0
|
1336 /* Handles stderr stream from child process */
|
jbe@0
|
1337 static void moonbr_read_errorchannel(struct moonbr_worker *worker) {
|
jbe@0
|
1338 char staticbuf[MOONBR_MAXERRORLINELEN+1];
|
jbe@0
|
1339 char *buf = worker->errorlinebuf;
|
jbe@0
|
1340 if (!buf) buf = staticbuf;
|
jbe@0
|
1341 {
|
jbe@0
|
1342 ssize_t bytes_read;
|
jbe@0
|
1343 while (
|
jbe@0
|
1344 (bytes_read = read(
|
jbe@0
|
1345 worker->errorfd,
|
jbe@0
|
1346 buf + worker->errorlinelen,
|
jbe@0
|
1347 MOONBR_MAXERRORLINELEN+1 - worker->errorlinelen
|
jbe@0
|
1348 )) <= 0
|
jbe@0
|
1349 ) {
|
jbe@0
|
1350 if (bytes_read == 0 || errno == ECONNRESET) {
|
jbe@0
|
1351 if (moonbr_debug) {
|
jbe@0
|
1352 moonbr_log(LOG_DEBUG, "Child process in pool #%i with PID %i closed stderr socket", worker->pool->poolnum, (int)worker->pid);
|
jbe@0
|
1353 }
|
jbe@0
|
1354 if (close(worker->errorfd) && errno != EINTR) {
|
jbe@0
|
1355 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
|
1356 moonbr_terminate_error();
|
jbe@0
|
1357 }
|
jbe@0
|
1358 worker->errorfd = -1;
|
jbe@0
|
1359 moonbr_poll_refresh_needed = 1;
|
jbe@0
|
1360 break;
|
jbe@0
|
1361 }
|
jbe@0
|
1362 if (errno != EINTR) {
|
jbe@0
|
1363 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
|
1364 moonbr_terminate_error();
|
jbe@0
|
1365 }
|
jbe@0
|
1366 }
|
jbe@0
|
1367 worker->errorlinelen += bytes_read;
|
jbe@0
|
1368 }
|
jbe@0
|
1369 {
|
jbe@0
|
1370 int i;
|
jbe@0
|
1371 for (i=0; i<worker->errorlinelen; i++) {
|
jbe@0
|
1372 if (buf[i] == '\n') buf[i] = 0;
|
jbe@0
|
1373 if (!buf[i]) {
|
jbe@0
|
1374 if (worker->errorlineovf) {
|
jbe@0
|
1375 worker->errorlineovf = 0;
|
jbe@0
|
1376 } else {
|
jbe@0
|
1377 moonbr_log(LOG_WARNING, "Error log from process in pool #%i with PID %i: %s", worker->pool->poolnum, (int)worker->pid, buf);
|
jbe@0
|
1378 }
|
jbe@0
|
1379 worker->errorlinelen -= i+1;
|
jbe@0
|
1380 memmove(buf, buf+i+1, worker->errorlinelen);
|
jbe@0
|
1381 i = -1;
|
jbe@0
|
1382 }
|
jbe@0
|
1383 }
|
jbe@0
|
1384 if (i > MOONBR_MAXERRORLINELEN) {
|
jbe@0
|
1385 buf[MOONBR_MAXERRORLINELEN] = 0;
|
jbe@0
|
1386 if (!worker->errorlineovf) {
|
jbe@0
|
1387 moonbr_log(LOG_WARNING, "Error log from process in pool #%i with PID %i (line has been truncated): %s", worker->pool->poolnum, (int)worker->pid, buf);
|
jbe@0
|
1388 }
|
jbe@0
|
1389 worker->errorlinelen = 0;
|
jbe@0
|
1390 worker->errorlineovf = 1;
|
jbe@0
|
1391 }
|
jbe@0
|
1392 }
|
jbe@0
|
1393 if (!worker->errorlinebuf && worker->errorlinelen) { /* allocate buffer on heap only if necessary */
|
jbe@0
|
1394 worker->errorlinebuf = malloc((MOONBR_MAXERRORLINELEN+1) * sizeof(char));
|
jbe@0
|
1395 if (!worker->errorlinebuf) {
|
jbe@0
|
1396 moonbr_log(LOG_CRIT, "Memory allocation error");
|
jbe@0
|
1397 moonbr_terminate_error();
|
jbe@0
|
1398 }
|
jbe@0
|
1399 memcpy(worker->errorlinebuf, staticbuf, worker->errorlinelen);
|
jbe@0
|
1400 }
|
jbe@0
|
1401 }
|
jbe@0
|
1402
|
jbe@0
|
1403
|
jbe@0
|
1404 /*** Handler for incoming connections ***/
|
jbe@0
|
1405
|
jbe@0
|
1406 /* Accepts one or more incoming connections on listener socket and passes it to worker(s) popped from idle queue */
|
jbe@0
|
1407 static void moonbr_connect(struct moonbr_pool *pool) {
|
jbe@0
|
1408 struct moonbr_listener *listener = moonbr_pop_connected_listener(pool);
|
jbe@0
|
1409 struct moonbr_worker *worker;
|
jbe@127
|
1410 if (listener->proto == MOONBR_PROTO_MAIN) {
|
jbe@127
|
1411 worker = moonbr_pop_idle_worker(pool);
|
jbe@127
|
1412 if (moonbr_stat) {
|
jbe@127
|
1413 moonbr_log(LOG_INFO, "Dispatching main thread of pool #%i to PID %i", listener->pool->poolnum, (int)worker->pid);
|
jbe@127
|
1414 }
|
jbe@127
|
1415 worker->main = 1;
|
jbe@127
|
1416 moonbr_send_control_message(worker, MOONBR_COMMAND_CONNECT, -1, listener);
|
jbe@127
|
1417 /* do not push listener to queue of idle listeners */
|
jbe@127
|
1418 } else if (listener->proto == MOONBR_PROTO_INTERVAL) {
|
jbe@0
|
1419 worker = moonbr_pop_idle_worker(pool);
|
jbe@0
|
1420 if (moonbr_stat) {
|
jbe@125
|
1421 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@0
|
1422 }
|
jbe@0
|
1423 worker->restart_interval_listener = listener;
|
jbe@124
|
1424 moonbr_send_control_message(worker, MOONBR_COMMAND_CONNECT, -1, listener);
|
jbe@0
|
1425 /* do not push listener to queue of idle listeners yet */
|
jbe@125
|
1426 } else {
|
jbe@125
|
1427 int peerfd;
|
jbe@0
|
1428 do {
|
jbe@125
|
1429 peerfd = accept4(listener->listenfd, NULL, NULL, SOCK_CLOEXEC);
|
jbe@0
|
1430 if (peerfd == -1) {
|
jbe@0
|
1431 if (errno == EWOULDBLOCK) {
|
jbe@0
|
1432 break;
|
jbe@0
|
1433 } else if (errno == ECONNABORTED) {
|
jbe@125
|
1434 moonbr_log(LOG_WARNING, "Connection aborted before accepting it");
|
jbe@0
|
1435 break;
|
jbe@0
|
1436 } else if (errno != EINTR) {
|
jbe@0
|
1437 moonbr_log(LOG_ERR, "Could not accept socket connection: %s", strerror(errno));
|
jbe@0
|
1438 moonbr_terminate_error();
|
jbe@0
|
1439 }
|
jbe@0
|
1440 } else {
|
jbe@0
|
1441 worker = moonbr_pop_idle_worker(pool);
|
jbe@0
|
1442 if (moonbr_stat) {
|
jbe@125
|
1443 moonbr_log(LOG_INFO, "Dispatching connection for pool #%i to PID %i", listener->pool->poolnum, (int)worker->pid);
|
jbe@0
|
1444 }
|
jbe@124
|
1445 moonbr_send_control_message(worker, MOONBR_COMMAND_CONNECT, peerfd, listener);
|
jbe@0
|
1446 if (close(peerfd) && errno != EINTR) {
|
jbe@0
|
1447 moonbr_log(LOG_ERR, "Could not close incoming socket connection in parent process: %s", strerror(errno));
|
jbe@0
|
1448 moonbr_terminate_error();
|
jbe@0
|
1449 }
|
jbe@0
|
1450 }
|
jbe@0
|
1451 } while (pool->first_idle_worker);
|
jbe@0
|
1452 moonbr_add_idle_listener(listener);
|
jbe@0
|
1453 }
|
jbe@0
|
1454 }
|
jbe@0
|
1455
|
jbe@0
|
1456
|
jbe@0
|
1457 /*** Functions to initialize and restart interval timers ***/
|
jbe@0
|
1458
|
jbe@0
|
1459 /* Initializes all interval timers */
|
jbe@0
|
1460 static void moonbr_interval_initialize() {
|
jbe@0
|
1461 struct timeval now;
|
jbe@0
|
1462 struct moonbr_pool *pool;
|
jbe@0
|
1463 moonbr_now(&now);
|
jbe@0
|
1464 for (pool=moonbr_first_pool; pool; pool=pool->next_pool) {
|
jbe@0
|
1465 int i;
|
jbe@0
|
1466 for (i=0; i<pool->listener_count; i++) {
|
jbe@0
|
1467 struct moonbr_listener *listener = &pool->listener[i];
|
jbe@0
|
1468 if (listener->proto == MOONBR_PROTO_INTERVAL) {
|
jbe@0
|
1469 timeradd(
|
jbe@0
|
1470 &now,
|
jbe@125
|
1471 &listener->type_specific.interval.delay,
|
jbe@125
|
1472 &listener->type_specific.interval.wakeup
|
jbe@0
|
1473 );
|
jbe@0
|
1474 }
|
jbe@0
|
1475 }
|
jbe@0
|
1476 }
|
jbe@0
|
1477 }
|
jbe@0
|
1478
|
jbe@0
|
1479 /* If necessary, restarts interval timers and queues interval listener as idle after a worker changed status */
|
jbe@0
|
1480 static void moonbr_interval_restart(
|
jbe@0
|
1481 struct moonbr_worker *worker,
|
jbe@0
|
1482 struct timeval *now /* passed to synchronize with moonbr_run() function */
|
jbe@0
|
1483 ) {
|
jbe@0
|
1484 struct moonbr_listener *listener = worker->restart_interval_listener;
|
jbe@0
|
1485 if (listener) {
|
jbe@0
|
1486 moonbr_add_idle_listener(listener);
|
jbe@0
|
1487 worker->restart_interval_listener = NULL;
|
jbe@125
|
1488 if (listener->type_specific.interval.strict) {
|
jbe@0
|
1489 timeradd(
|
jbe@125
|
1490 &listener->type_specific.interval.wakeup,
|
jbe@125
|
1491 &listener->type_specific.interval.delay,
|
jbe@125
|
1492 &listener->type_specific.interval.wakeup
|
jbe@0
|
1493 );
|
jbe@125
|
1494 if (timercmp(&listener->type_specific.interval.wakeup, now, <)) {
|
jbe@125
|
1495 listener->type_specific.interval.wakeup = *now;
|
jbe@0
|
1496 }
|
jbe@0
|
1497 } else {
|
jbe@0
|
1498 timeradd(
|
jbe@0
|
1499 now,
|
jbe@125
|
1500 &listener->type_specific.interval.delay,
|
jbe@125
|
1501 &listener->type_specific.interval.wakeup
|
jbe@0
|
1502 );
|
jbe@0
|
1503 }
|
jbe@0
|
1504 }
|
jbe@0
|
1505 }
|
jbe@0
|
1506
|
jbe@0
|
1507
|
jbe@0
|
1508 /*** Main loop and helper functions ***/
|
jbe@0
|
1509
|
jbe@0
|
1510 /* Stores the earliest required wakeup time in 'wait' variable */
|
jbe@0
|
1511 static void moonbr_calc_wait(struct timeval *wait, struct timeval *wakeup) {
|
jbe@0
|
1512 if (!timerisset(wait) || timercmp(wakeup, wait, <)) *wait = *wakeup;
|
jbe@0
|
1513 }
|
jbe@0
|
1514
|
jbe@0
|
1515 /* Main loop of Moonbridge system (including initialization of signal handlers and polling structures) */
|
jbe@0
|
1516 static void moonbr_run(lua_State *L) {
|
jbe@0
|
1517 struct timeval now;
|
jbe@0
|
1518 struct moonbr_pool *pool;
|
jbe@0
|
1519 struct moonbr_worker *worker;
|
jbe@0
|
1520 struct moonbr_worker *next_worker; /* needed when worker is removed during iteration of workers */
|
jbe@0
|
1521 struct moonbr_listener *listener;
|
jbe@0
|
1522 struct moonbr_listener *next_listener; /* needed when listener is removed during iteration of listeners */
|
jbe@0
|
1523 int i;
|
jbe@0
|
1524 moonbr_poll_init(); /* must be executed before moonbr_signal_init() */
|
jbe@0
|
1525 moonbr_signal_init();
|
jbe@0
|
1526 moonbr_interval_initialize();
|
jbe@0
|
1527 moonbr_pstate = MOONBR_PSTATE_RUNNING;
|
jbe@0
|
1528 while (1) {
|
jbe@0
|
1529 struct timeval wait = {0, }; /* point in time when premature wakeup of poll() is required */
|
jbe@0
|
1530 if (moonbr_cond_interrupt) {
|
jbe@0
|
1531 moonbr_log(LOG_WARNING, "Fast shutdown requested");
|
jbe@0
|
1532 moonbr_terminate(MOONBR_EXITCODE_GRACEFUL);
|
jbe@0
|
1533 }
|
jbe@0
|
1534 if (moonbr_cond_terminate) {
|
jbe@0
|
1535 moonbr_initiate_shutdown();
|
jbe@0
|
1536 moonbr_cond_terminate = 0;
|
jbe@0
|
1537 }
|
jbe@0
|
1538 moonbr_cond_child = 0; /* must not be reset between moonbr_try_destroy_worker() and poll() */
|
jbe@0
|
1539 moonbr_now(&now);
|
jbe@0
|
1540 for (pool=moonbr_first_pool; pool; pool=pool->next_pool) {
|
jbe@0
|
1541 int terminated_worker_count = 0; /* allows shortcut for new worker creation */
|
jbe@0
|
1542 /* terminate idle workers when expired */
|
jbe@0
|
1543 if (timerisset(&pool->idle_timeout)) {
|
jbe@0
|
1544 while ((worker = pool->first_idle_worker) != NULL) {
|
jbe@0
|
1545 if (timercmp(&worker->idle_expiration, &now, >)) break;
|
jbe@0
|
1546 moonbr_pop_idle_worker(pool);
|
jbe@0
|
1547 moonbr_terminate_idle_worker(worker);
|
jbe@0
|
1548 }
|
jbe@0
|
1549 }
|
jbe@0
|
1550 /* mark listeners as connected when incoming connection is pending */
|
jbe@0
|
1551 for (listener=pool->first_idle_listener; listener; listener=next_listener) {
|
jbe@0
|
1552 next_listener = listener->next_listener; /* extra variable necessary due to changing list */
|
jbe@0
|
1553 if (listener->pollidx != -1) {
|
jbe@0
|
1554 if (moonbr_poll_fds[listener->pollidx].revents) {
|
jbe@0
|
1555 moonbr_poll_fds[listener->pollidx].revents = 0;
|
jbe@0
|
1556 moonbr_remove_idle_listener(listener);
|
jbe@0
|
1557 moonbr_add_connected_listener(listener);
|
jbe@0
|
1558 }
|
jbe@127
|
1559 } else if (
|
jbe@127
|
1560 listener->proto != MOONBR_PROTO_INTERVAL ||
|
jbe@127
|
1561 !timercmp(&listener->type_specific.interval.wakeup, &now, >)
|
jbe@127
|
1562 ) {
|
jbe@127
|
1563 moonbr_remove_idle_listener(listener);
|
jbe@127
|
1564 moonbr_add_connected_listener(listener);
|
jbe@0
|
1565 }
|
jbe@0
|
1566 }
|
jbe@0
|
1567 /* process input from child processes */
|
jbe@0
|
1568 for (i=0; i<moonbr_poll_worker_count; i++) {
|
jbe@0
|
1569 if (moonbr_poll_worker_fds[i].revents) {
|
jbe@0
|
1570 moonbr_poll_worker_fds[i].revents = 0;
|
jbe@0
|
1571 struct moonbr_poll_worker *poll_worker = &moonbr_poll_workers[i];
|
jbe@0
|
1572 switch (poll_worker->channel) {
|
jbe@0
|
1573 case MOONBR_POLL_WORKER_CONTROLCHANNEL:
|
jbe@0
|
1574 moonbr_read_controlchannel(poll_worker->worker);
|
jbe@0
|
1575 moonbr_interval_restart(poll_worker->worker, &now);
|
jbe@0
|
1576 break;
|
jbe@0
|
1577 case MOONBR_POLL_WORKER_ERRORCHANNEL:
|
jbe@0
|
1578 moonbr_read_errorchannel(poll_worker->worker);
|
jbe@0
|
1579 break;
|
jbe@0
|
1580 }
|
jbe@0
|
1581 }
|
jbe@0
|
1582 }
|
jbe@0
|
1583 /* collect dead child processes */
|
jbe@0
|
1584 for (worker=pool->first_worker; worker; worker=next_worker) {
|
jbe@0
|
1585 next_worker = worker->next_worker; /* extra variable necessary due to changing list */
|
jbe@0
|
1586 switch (moonbr_try_destroy_worker(worker)) {
|
jbe@0
|
1587 case MOONBR_DESTROY_PREPARE:
|
jbe@0
|
1588 pool->use_fork_error_wakeup = 1;
|
jbe@0
|
1589 break;
|
jbe@0
|
1590 case MOONBR_DESTROY_IDLE_OR_ASSIGNED:
|
jbe@0
|
1591 terminated_worker_count++;
|
jbe@0
|
1592 break;
|
jbe@0
|
1593 }
|
jbe@0
|
1594 }
|
jbe@0
|
1595 if (!moonbr_shutdown_in_progress) {
|
jbe@130
|
1596 /* connect listeners with idle workers */
|
jbe@0
|
1597 while (pool->first_connected_listener && pool->first_idle_worker) {
|
jbe@0
|
1598 moonbr_connect(pool);
|
jbe@0
|
1599 }
|
jbe@130
|
1600 /* create new worker processes */
|
jbe@130
|
1601 while (
|
jbe@130
|
1602 pool->total_worker_count < pool->max_fork && (
|
jbe@130
|
1603 pool->unassigned_worker_count < pool->pre_fork ||
|
jbe@130
|
1604 pool->total_worker_count < pool->min_fork
|
jbe@130
|
1605 )
|
jbe@130
|
1606 ) {
|
jbe@130
|
1607 if (pool->use_fork_error_wakeup) {
|
jbe@130
|
1608 if (timercmp(&pool->fork_error_wakeup, &now, >)) {
|
jbe@130
|
1609 moonbr_calc_wait(&wait, &pool->fork_error_wakeup);
|
jbe@130
|
1610 break;
|
jbe@130
|
1611 }
|
jbe@130
|
1612 } else {
|
jbe@130
|
1613 if (terminated_worker_count) {
|
jbe@130
|
1614 terminated_worker_count--;
|
jbe@130
|
1615 } else if (timercmp(&pool->fork_wakeup, &now, >)) {
|
jbe@130
|
1616 moonbr_calc_wait(&wait, &pool->fork_wakeup);
|
jbe@130
|
1617 break;
|
jbe@130
|
1618 }
|
jbe@0
|
1619 }
|
jbe@130
|
1620 if (moonbr_create_worker(pool, L)) {
|
jbe@130
|
1621 /* on error, enforce error delay */
|
jbe@130
|
1622 timeradd(&now, &pool->fork_error_delay, &pool->fork_error_wakeup);
|
jbe@130
|
1623 pool->use_fork_error_wakeup = 1;
|
jbe@130
|
1624 moonbr_calc_wait(&wait, &pool->fork_error_wakeup);
|
jbe@130
|
1625 break;
|
jbe@130
|
1626 } else {
|
jbe@130
|
1627 /* normal fork delay on success */
|
jbe@130
|
1628 timeradd(&now, &pool->fork_delay, &pool->fork_wakeup);
|
jbe@130
|
1629 timeradd(&now, &pool->fork_error_delay, &pool->fork_error_wakeup);
|
jbe@130
|
1630 pool->use_fork_error_wakeup = 0; /* gets set later if error occures during preparation */
|
jbe@130
|
1631 }
|
jbe@130
|
1632 }
|
jbe@130
|
1633 /* terminate excessive worker processes */
|
jbe@130
|
1634 while (
|
jbe@130
|
1635 pool->total_worker_count > pool->min_fork &&
|
jbe@130
|
1636 pool->idle_worker_count > pool->pre_fork
|
jbe@130
|
1637 ) {
|
jbe@130
|
1638 if (timerisset(&pool->exit_wakeup)) {
|
jbe@130
|
1639 if (timercmp(&pool->exit_wakeup, &now, >)) {
|
jbe@130
|
1640 moonbr_calc_wait(&wait, &pool->exit_wakeup);
|
jbe@130
|
1641 break;
|
jbe@130
|
1642 }
|
jbe@130
|
1643 moonbr_terminate_idle_worker(moonbr_pop_idle_worker(pool));
|
jbe@130
|
1644 timeradd(&now, &pool->exit_delay, &pool->exit_wakeup);
|
jbe@130
|
1645 } else {
|
jbe@130
|
1646 timeradd(&now, &pool->exit_delay, &pool->exit_wakeup);
|
jbe@0
|
1647 break;
|
jbe@0
|
1648 }
|
jbe@0
|
1649 }
|
jbe@130
|
1650 if (!(
|
jbe@130
|
1651 pool->total_worker_count > pool->min_fork &&
|
jbe@130
|
1652 pool->idle_worker_count > pool->pre_fork
|
jbe@130
|
1653 )) {
|
jbe@130
|
1654 timerclear(&pool->exit_wakeup); /* timer gets restarted later when there are excessive workers */
|
jbe@0
|
1655 }
|
jbe@0
|
1656 }
|
jbe@0
|
1657 /* optionally output worker count stats */
|
jbe@0
|
1658 if (moonbr_stat && pool->worker_count_stat) {
|
jbe@0
|
1659 pool->worker_count_stat = 0;
|
jbe@0
|
1660 moonbr_log(
|
jbe@0
|
1661 LOG_INFO,
|
jbe@0
|
1662 "Worker count for pool #%i: %i idle, %i assigned, %i total",
|
jbe@0
|
1663 pool->poolnum, pool->idle_worker_count,
|
jbe@0
|
1664 pool->total_worker_count - pool->unassigned_worker_count,
|
jbe@0
|
1665 pool->total_worker_count);
|
jbe@0
|
1666 }
|
jbe@0
|
1667 /* calculate wakeup time for interval listeners */
|
jbe@0
|
1668 for (listener=pool->first_idle_listener; listener; listener=listener->next_listener) {
|
jbe@0
|
1669 if (listener->proto == MOONBR_PROTO_INTERVAL) {
|
jbe@125
|
1670 moonbr_calc_wait(&wait, &listener->type_specific.interval.wakeup);
|
jbe@0
|
1671 }
|
jbe@0
|
1672 }
|
jbe@0
|
1673 /* calculate wakeup time for idle workers (only first idle worker is significant) */
|
jbe@0
|
1674 if (timerisset(&pool->idle_timeout) && pool->first_idle_worker) {
|
jbe@0
|
1675 moonbr_calc_wait(&wait, &pool->first_idle_worker->idle_expiration);
|
jbe@0
|
1676 }
|
jbe@0
|
1677 }
|
jbe@130
|
1678 /* terminate idle workers in case of shutdown and check if shutdown is complete */
|
jbe@0
|
1679 if (moonbr_shutdown_in_progress) {
|
jbe@0
|
1680 for (pool=moonbr_first_pool; pool; pool=pool->next_pool) {
|
jbe@130
|
1681 if (pool->first_worker) {
|
jbe@130
|
1682 while (pool->idle_worker_count) {
|
jbe@130
|
1683 moonbr_terminate_idle_worker(moonbr_pop_idle_worker(pool));
|
jbe@130
|
1684 }
|
jbe@130
|
1685 break;
|
jbe@130
|
1686 }
|
jbe@0
|
1687 }
|
jbe@0
|
1688 if (!pool) {
|
jbe@0
|
1689 moonbr_log(LOG_INFO, "All worker threads have terminated");
|
jbe@0
|
1690 moonbr_terminate(MOONBR_EXITCODE_GRACEFUL);
|
jbe@0
|
1691 }
|
jbe@0
|
1692 }
|
jbe@0
|
1693 if (moonbr_poll_refresh_needed) moonbr_poll_refresh();
|
jbe@0
|
1694 moonbr_cond_poll = 1;
|
jbe@0
|
1695 if (!moonbr_cond_child && !moonbr_cond_terminate && !moonbr_cond_interrupt) {
|
jbe@0
|
1696 int timeout;
|
jbe@0
|
1697 if (timerisset(&wait)) {
|
jbe@0
|
1698 if (timercmp(&wait, &now, <)) {
|
jbe@0
|
1699 moonbr_log(LOG_CRIT, "Internal error (should not happen): Future is in the past");
|
jbe@0
|
1700 moonbr_terminate_error();
|
jbe@0
|
1701 }
|
jbe@0
|
1702 timersub(&wait, &now, &wait);
|
jbe@0
|
1703 timeout = wait.tv_sec * 1000 + wait.tv_usec / 1000;
|
jbe@0
|
1704 } else {
|
jbe@0
|
1705 timeout = INFTIM;
|
jbe@0
|
1706 }
|
jbe@0
|
1707 if (moonbr_debug) {
|
jbe@0
|
1708 moonbr_log(LOG_DEBUG, "Waiting for I/O");
|
jbe@0
|
1709 }
|
jbe@0
|
1710 poll(moonbr_poll_fds, moonbr_poll_fds_count, timeout);
|
jbe@0
|
1711 } else {
|
jbe@0
|
1712 if (moonbr_debug) {
|
jbe@0
|
1713 moonbr_log(LOG_DEBUG, "Do not wait for I/O");
|
jbe@0
|
1714 }
|
jbe@0
|
1715 }
|
jbe@0
|
1716 moonbr_cond_poll = 0;
|
jbe@0
|
1717 moonbr_poll_reset_signal();
|
jbe@0
|
1718 }
|
jbe@0
|
1719 }
|
jbe@0
|
1720
|
jbe@0
|
1721
|
jbe@0
|
1722 /*** Lua interface ***/
|
jbe@0
|
1723
|
jbe@0
|
1724 static int moonbr_lua_panic(lua_State *L) {
|
jbe@0
|
1725 const char *errmsg;
|
jbe@0
|
1726 errmsg = lua_tostring(L, -1);
|
jbe@0
|
1727 if (!errmsg) {
|
jbe@0
|
1728 if (lua_isnoneornil(L, -1)) errmsg = "(error message is nil)";
|
jbe@0
|
1729 else errmsg = "(error message is not a string)";
|
jbe@0
|
1730 }
|
jbe@0
|
1731 if (moonbr_pstate == MOONBR_PSTATE_FORKED) {
|
jbe@0
|
1732 fprintf(stderr, "Uncaught Lua error: %s\n", errmsg);
|
jbe@0
|
1733 exit(1);
|
jbe@0
|
1734 } else {
|
jbe@0
|
1735 moonbr_log(LOG_CRIT, "Uncaught Lua error: %s", errmsg);
|
jbe@0
|
1736 moonbr_terminate_error();
|
jbe@0
|
1737 }
|
jbe@0
|
1738 return 0;
|
jbe@0
|
1739 }
|
jbe@0
|
1740
|
jbe@0
|
1741 static int moonbr_addtraceback(lua_State *L) {
|
jbe@0
|
1742 luaL_traceback(L, L, luaL_tolstring(L, 1, NULL), 1);
|
jbe@0
|
1743 return 1;
|
jbe@0
|
1744 }
|
jbe@0
|
1745
|
jbe@0
|
1746 /* Memory allocator that allows limiting memory consumption */
|
jbe@0
|
1747 static void *moonbr_alloc (void *ud, void *ptr, size_t osize, size_t nsize) {
|
jbe@0
|
1748 (void)ud; /* not used */
|
jbe@0
|
1749 if (nsize == 0) {
|
jbe@0
|
1750 if (ptr) {
|
jbe@0
|
1751 moonbr_memory_usage -= osize;
|
jbe@0
|
1752 free(ptr);
|
jbe@0
|
1753 }
|
jbe@0
|
1754 return NULL;
|
jbe@0
|
1755 } else if (ptr) {
|
jbe@0
|
1756 if (
|
jbe@0
|
1757 moonbr_memory_limit &&
|
jbe@0
|
1758 nsize > osize &&
|
jbe@0
|
1759 moonbr_memory_usage + (nsize - osize) > moonbr_memory_limit
|
jbe@0
|
1760 ) {
|
jbe@0
|
1761 return NULL;
|
jbe@0
|
1762 } else {
|
jbe@0
|
1763 ptr = realloc(ptr, nsize);
|
jbe@0
|
1764 if (ptr) moonbr_memory_usage += nsize - osize;
|
jbe@0
|
1765 }
|
jbe@0
|
1766 } else {
|
jbe@0
|
1767 if (
|
jbe@0
|
1768 moonbr_memory_limit &&
|
jbe@0
|
1769 moonbr_memory_usage + nsize > moonbr_memory_limit
|
jbe@0
|
1770 ) {
|
jbe@0
|
1771 return NULL;
|
jbe@0
|
1772 } else {
|
jbe@0
|
1773 ptr = realloc(ptr, nsize);
|
jbe@0
|
1774 if (ptr) moonbr_memory_usage += nsize;
|
jbe@0
|
1775 }
|
jbe@0
|
1776 }
|
jbe@0
|
1777 return ptr;
|
jbe@0
|
1778 }
|
jbe@0
|
1779
|
jbe@66
|
1780 static int moonbr_lua_tonatural(lua_State *L, int idx) {
|
jbe@66
|
1781 int isnum;
|
jbe@66
|
1782 lua_Number n;
|
jbe@66
|
1783 n = lua_tonumberx(L, idx, &isnum);
|
jbe@66
|
1784 if (isnum && n>=0 && n<INT_MAX && (lua_Number)(int)n == n) return n;
|
jbe@66
|
1785 else return -1;
|
jbe@66
|
1786 }
|
jbe@66
|
1787
|
jbe@66
|
1788 static int moonbr_lua_totimeval(lua_State *L, int idx, struct timeval *value) {
|
jbe@66
|
1789 int isnum;
|
jbe@66
|
1790 lua_Number n;
|
jbe@66
|
1791 n = lua_tonumberx(L, idx, &isnum);
|
jbe@66
|
1792 if (isnum && n>=0 && n<=100000000) {
|
jbe@66
|
1793 value->tv_sec = n;
|
jbe@66
|
1794 value->tv_usec = 1e6 * (n - value->tv_sec);
|
jbe@66
|
1795 return 1;
|
jbe@66
|
1796 } else {
|
jbe@66
|
1797 return 0;
|
jbe@66
|
1798 }
|
jbe@66
|
1799 }
|
jbe@66
|
1800
|
jbe@0
|
1801 static int moonbr_timeout(lua_State *L) {
|
jbe@0
|
1802 struct itimerval oldval;
|
jbe@0
|
1803 if (lua_isnoneornil(L, 1) && lua_isnoneornil(L, 2)) {
|
jbe@0
|
1804 getitimer(ITIMER_REAL, &oldval);
|
jbe@0
|
1805 } else {
|
jbe@0
|
1806 struct itimerval newval = {};
|
jbe@39
|
1807 timerclear(&newval.it_interval);
|
jbe@39
|
1808 timerclear(&newval.it_value);
|
jbe@0
|
1809 if (lua_toboolean(L, 1)) {
|
jbe@0
|
1810 luaL_argcheck(
|
jbe@0
|
1811 L, moonbr_lua_totimeval(L, 1, &newval.it_value), 1,
|
jbe@0
|
1812 "interval in seconds expected"
|
jbe@0
|
1813 );
|
jbe@0
|
1814 }
|
jbe@0
|
1815 if (lua_isnoneornil(L, 2)) {
|
jbe@0
|
1816 if (setitimer(ITIMER_REAL, &newval, &oldval)) {
|
jbe@0
|
1817 moonbr_log(LOG_CRIT, "Could not set ITIMER_REAL via setitimer()");
|
jbe@0
|
1818 moonbr_terminate_error();
|
jbe@0
|
1819 }
|
jbe@0
|
1820 } else {
|
jbe@0
|
1821 getitimer(ITIMER_REAL, &oldval);
|
jbe@39
|
1822 if (!timerisset(&oldval.it_value)) {
|
jbe@39
|
1823 if (setitimer(ITIMER_REAL, &newval, NULL)) {
|
jbe@39
|
1824 moonbr_log(LOG_CRIT, "Could not set ITIMER_REAL via setitimer()");
|
jbe@39
|
1825 moonbr_terminate_error();
|
jbe@39
|
1826 }
|
jbe@39
|
1827 lua_call(L, lua_gettop(L) - 2, LUA_MULTRET);
|
jbe@39
|
1828 timerclear(&newval.it_value);
|
jbe@39
|
1829 if (setitimer(ITIMER_REAL, &newval, NULL)) {
|
jbe@39
|
1830 moonbr_log(LOG_CRIT, "Could not set ITIMER_REAL via setitimer()");
|
jbe@39
|
1831 moonbr_terminate_error();
|
jbe@39
|
1832 }
|
jbe@39
|
1833 } else if (timercmp(&newval.it_value, &oldval.it_value, <)) {
|
jbe@0
|
1834 struct itimerval remval;
|
jbe@0
|
1835 if (setitimer(ITIMER_REAL, &newval, NULL)) {
|
jbe@0
|
1836 moonbr_log(LOG_CRIT, "Could not set ITIMER_REAL via setitimer()");
|
jbe@0
|
1837 moonbr_terminate_error();
|
jbe@0
|
1838 }
|
jbe@0
|
1839 lua_call(L, lua_gettop(L) - 2, LUA_MULTRET);
|
jbe@0
|
1840 getitimer(ITIMER_REAL, &remval);
|
jbe@0
|
1841 timersub(&oldval.it_value, &newval.it_value, &newval.it_value);
|
jbe@0
|
1842 timeradd(&newval.it_value, &remval.it_value, &newval.it_value);
|
jbe@0
|
1843 if (setitimer(ITIMER_REAL, &newval, NULL)) {
|
jbe@0
|
1844 moonbr_log(LOG_CRIT, "Could not set ITIMER_REAL via setitimer()");
|
jbe@0
|
1845 moonbr_terminate_error();
|
jbe@0
|
1846 }
|
jbe@0
|
1847 } else {
|
jbe@0
|
1848 lua_call(L, lua_gettop(L) - 2, LUA_MULTRET);
|
jbe@0
|
1849 }
|
jbe@0
|
1850 return lua_gettop(L) - 1;
|
jbe@0
|
1851 }
|
jbe@0
|
1852 }
|
jbe@115
|
1853 lua_pushnumber(L, oldval.it_value.tv_sec + 1e-6 * oldval.it_value.tv_usec);
|
jbe@0
|
1854 return 1;
|
jbe@0
|
1855 }
|
jbe@0
|
1856
|
jbe@0
|
1857 #define moonbr_listen_init_pool_forkoption(luaname, cname, defval) { \
|
jbe@0
|
1858 lua_getfield(L, 2, luaname); \
|
jbe@0
|
1859 pool->cname = lua_isnil(L, -1) ? (defval) : moonbr_lua_tonatural(L, -1); \
|
jbe@0
|
1860 } while(0)
|
jbe@0
|
1861
|
jbe@0
|
1862 #define moonbr_listen_init_pool_timeoption(luaname, cname, defval, defvalu) ( \
|
jbe@0
|
1863 lua_getfield(L, 2, luaname), \
|
jbe@0
|
1864 lua_isnil(L, -1) ? ( \
|
jbe@0
|
1865 pool->cname.tv_sec = (defval), pool->cname.tv_usec = (defvalu), \
|
jbe@0
|
1866 1 \
|
jbe@0
|
1867 ) : ( \
|
jbe@0
|
1868 (lua_isboolean(L, -1) && !lua_toboolean(L, -1)) ? ( \
|
jbe@0
|
1869 pool->cname.tv_sec = 0, pool->cname.tv_usec = 0, \
|
jbe@0
|
1870 1 \
|
jbe@0
|
1871 ) : ( \
|
jbe@0
|
1872 moonbr_lua_totimeval(L, -1, &pool->cname) \
|
jbe@0
|
1873 ) \
|
jbe@0
|
1874 ) \
|
jbe@0
|
1875 )
|
jbe@0
|
1876
|
jbe@0
|
1877 static int moonbr_listen_init_pool(lua_State *L) {
|
jbe@0
|
1878 struct moonbr_pool *pool;
|
jbe@0
|
1879 const char *proto;
|
jbe@0
|
1880 int i;
|
jbe@127
|
1881 int dynamic = 0; /* nonzero = listeners exist which require dynamic worker creation */
|
jbe@0
|
1882 pool = lua_touserdata(L, 1);
|
jbe@0
|
1883 for (i=0; i<pool->listener_count; i++) {
|
jbe@0
|
1884 struct moonbr_listener *listener = &pool->listener[i];
|
jbe@0
|
1885 lua_settop(L, 2);
|
jbe@3
|
1886 #if LUA_VERSION_NUM >= 503
|
jbe@3
|
1887 lua_geti(L, 2, i+1);
|
jbe@3
|
1888 #else
|
jbe@0
|
1889 lua_pushinteger(L, i+1);
|
jbe@0
|
1890 lua_gettable(L, 2);
|
jbe@3
|
1891 #endif
|
jbe@0
|
1892 lua_getfield(L, 3, "proto");
|
jbe@0
|
1893 proto = lua_tostring(L, -1);
|
jbe@127
|
1894 if (proto && !strcmp(proto, "main")) {
|
jbe@127
|
1895 listener->proto = MOONBR_PROTO_MAIN;
|
jbe@127
|
1896 } else if (proto && !strcmp(proto, "interval")) {
|
jbe@127
|
1897 dynamic = 1;
|
jbe@0
|
1898 listener->proto = MOONBR_PROTO_INTERVAL;
|
jbe@0
|
1899 lua_getfield(L, 3, "name");
|
jbe@0
|
1900 {
|
jbe@0
|
1901 const char *name = lua_tostring(L, -1);
|
jbe@0
|
1902 if (name) {
|
jbe@125
|
1903 if (asprintf(&listener->type_specific.interval.name, "%s", name) < 0) {
|
jbe@0
|
1904 moonbr_log(LOG_CRIT, "Memory allocation_error");
|
jbe@0
|
1905 moonbr_terminate_error();
|
jbe@0
|
1906 }
|
jbe@0
|
1907 }
|
jbe@0
|
1908 }
|
jbe@0
|
1909 lua_getfield(L, 3, "delay");
|
jbe@0
|
1910 if (
|
jbe@125
|
1911 !moonbr_lua_totimeval(L, -1, &listener->type_specific.interval.delay) ||
|
jbe@125
|
1912 !timerisset(&listener->type_specific.interval.delay)
|
jbe@0
|
1913 ) {
|
jbe@0
|
1914 luaL_error(L, "No valid interval delay specified; use listen{{proto=\"interval\", delay=...}, ...}");
|
jbe@0
|
1915 }
|
jbe@0
|
1916 lua_getfield(L, 3, "strict");
|
jbe@0
|
1917 if (!lua_isnil(L, -1)) {
|
jbe@0
|
1918 if (lua_isboolean(L, -1)) {
|
jbe@125
|
1919 if (lua_toboolean(L, -1)) listener->type_specific.interval.strict = 1;
|
jbe@0
|
1920 } else {
|
jbe@0
|
1921 luaL_error(L, "Option \"strict\" must be a boolean if set; use listen{{proto=\"interval\", strict=true, ...}, ...}");
|
jbe@0
|
1922 }
|
jbe@0
|
1923 }
|
jbe@0
|
1924 } else if (proto && !strcmp(proto, "local")) {
|
jbe@125
|
1925 const char *path;
|
jbe@125
|
1926 const int path_maxlen = (
|
jbe@125
|
1927 sizeof(listener->type_specific.socket.addr.addr_un) -
|
jbe@125
|
1928 ((void *)listener->type_specific.socket.addr.addr_un.sun_path - (void *)&listener->type_specific.socket.addr.addr_un)
|
jbe@125
|
1929 ) - 1; /* one byte for termination */
|
jbe@127
|
1930 dynamic = 1;
|
jbe@0
|
1931 listener->proto = MOONBR_PROTO_LOCAL;
|
jbe@0
|
1932 lua_getfield(L, 3, "path");
|
jbe@125
|
1933 path = lua_tostring(L, -1);
|
jbe@125
|
1934 if (!path) {
|
jbe@125
|
1935 luaL_error(L, "No valid path specified for local socket; use listen{{proto=\"local\", path=...}, ...}");
|
jbe@125
|
1936 }
|
jbe@125
|
1937 if (strlen(path) > path_maxlen) {
|
jbe@125
|
1938 luaL_error(L, "Path name for local socket exceeded maximum length of %i characters", path_maxlen);
|
jbe@125
|
1939 }
|
jbe@125
|
1940 strcpy(listener->type_specific.socket.addr.addr_un.sun_path, path);
|
jbe@125
|
1941 } else if (proto && !strcmp(proto, "tcp")) {
|
jbe@125
|
1942 const char *host, *port;
|
jbe@125
|
1943 struct addrinfo hints = { 0, };
|
jbe@125
|
1944 struct addrinfo *res, *addrinfo;
|
jbe@125
|
1945 int errcode;
|
jbe@125
|
1946 const char *ip;
|
jbe@127
|
1947 dynamic = 1;
|
jbe@125
|
1948 lua_getfield(L, 3, "host");
|
jbe@125
|
1949 host = lua_isnil(L, -1) ? "::" : lua_tostring(L, -1);
|
jbe@125
|
1950 if (!host) {
|
jbe@125
|
1951 luaL_error(L, "No host specified; use listen{{proto=\"tcp\", host=...}, ...}");
|
jbe@125
|
1952 }
|
jbe@125
|
1953 lua_getfield(L, 3, "port");
|
jbe@125
|
1954 port = lua_tostring(L, -1);
|
jbe@125
|
1955 if (!port) {
|
jbe@125
|
1956 luaL_error(L, "No port specified; use listen{{proto=\"tcp\", host=...}, ...}");
|
jbe@125
|
1957 }
|
jbe@125
|
1958 hints.ai_family = AF_UNSPEC;
|
jbe@125
|
1959 hints.ai_socktype = SOCK_STREAM;
|
jbe@125
|
1960 hints.ai_protocol = IPPROTO_TCP;
|
jbe@125
|
1961 hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE;
|
jbe@125
|
1962 errcode = getaddrinfo(host, port, &hints, &res);
|
jbe@125
|
1963 if (errcode) {
|
jbe@125
|
1964 freeaddrinfo(res);
|
jbe@125
|
1965 if (errcode == EAI_SYSTEM) {
|
jbe@125
|
1966 char errmsg[MOONBR_MAXSTRERRORLEN];
|
jbe@125
|
1967 strerror_r(errno, errmsg, MOONBR_MAXSTRERRORLEN); /* use thread-safe call in case child created threads */
|
jbe@125
|
1968 luaL_error(L, "Could not resolve host: %s: %s", gai_strerror(errcode), errmsg);
|
jbe@125
|
1969 } else {
|
jbe@125
|
1970 luaL_error(L, "Could not resolve host: %s", gai_strerror(errcode));
|
jbe@0
|
1971 }
|
jbe@0
|
1972 }
|
jbe@125
|
1973 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
|
jbe@125
|
1974 if (addrinfo->ai_family == AF_INET6) goto moonbr_listen_init_pool_found;
|
jbe@125
|
1975 }
|
jbe@125
|
1976 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
|
jbe@125
|
1977 if (addrinfo->ai_family == AF_INET) goto moonbr_listen_init_pool_found;
|
jbe@0
|
1978 }
|
jbe@125
|
1979 addrinfo = res;
|
jbe@125
|
1980 moonbr_listen_init_pool_found:
|
jbe@125
|
1981 if (addrinfo->ai_addrlen > sizeof(listener->type_specific.socket.addr)) {
|
jbe@125
|
1982 moonbr_log(LOG_CRIT, "Size of ai_addrlen is unexpectedly big (should not happen)");
|
jbe@125
|
1983 moonbr_terminate_error();
|
jbe@0
|
1984 }
|
jbe@125
|
1985 memcpy(&listener->type_specific.socket.addr, addrinfo->ai_addr, addrinfo->ai_addrlen);
|
jbe@125
|
1986 listener->type_specific.socket.addrlen = addrinfo->ai_addrlen;
|
jbe@125
|
1987 switch (addrinfo->ai_family) {
|
jbe@125
|
1988 case AF_INET6:
|
jbe@125
|
1989 ip = inet_ntop(
|
jbe@125
|
1990 addrinfo->ai_family,
|
jbe@125
|
1991 &((struct sockaddr_in6 *)addrinfo->ai_addr)->sin6_addr,
|
jbe@125
|
1992 listener->proto_specific.tcp.ip,
|
jbe@125
|
1993 INET6_ADDRSTRLEN
|
jbe@125
|
1994 );
|
jbe@125
|
1995 if (!ip) {
|
jbe@125
|
1996 moonbr_log(LOG_CRIT, "System error in inet_ntop call: %s", strerror(errno));
|
jbe@125
|
1997 moonbr_terminate_error();
|
jbe@125
|
1998 }
|
jbe@125
|
1999 listener->proto_specific.tcp.port = ntohs(((struct sockaddr_in6 *)addrinfo->ai_addr)->sin6_port);
|
jbe@125
|
2000 break;
|
jbe@125
|
2001 case AF_INET:
|
jbe@125
|
2002 ip = inet_ntop(
|
jbe@125
|
2003 addrinfo->ai_family,
|
jbe@125
|
2004 &((struct sockaddr_in *)addrinfo->ai_addr)->sin_addr,
|
jbe@125
|
2005 listener->proto_specific.tcp.ip,
|
jbe@125
|
2006 INET6_ADDRSTRLEN
|
jbe@125
|
2007 );
|
jbe@125
|
2008 if (!ip) {
|
jbe@125
|
2009 moonbr_log(LOG_CRIT, "System error in inet_ntop call: %s", strerror(errno));
|
jbe@125
|
2010 moonbr_terminate_error();
|
jbe@125
|
2011 }
|
jbe@125
|
2012 listener->proto_specific.tcp.port = ntohs(((struct sockaddr_in *)addrinfo->ai_addr)->sin_port);
|
jbe@125
|
2013 break;
|
jbe@125
|
2014 default:
|
jbe@125
|
2015 strcpy(listener->proto_specific.tcp.ip, "unknown");
|
jbe@125
|
2016 listener->proto_specific.tcp.port = 0;
|
jbe@0
|
2017 }
|
jbe@125
|
2018 listener->proto = MOONBR_PROTO_TCP;
|
jbe@125
|
2019 } else if (proto) {
|
jbe@125
|
2020 luaL_error(L, "Unknown protocol \"%s\"", proto);
|
jbe@125
|
2021 } else {
|
jbe@125
|
2022 luaL_error(L, "No valid protocol specified; use listen{{proto=..., ...}, ...}");
|
jbe@0
|
2023 }
|
jbe@0
|
2024 }
|
jbe@0
|
2025 lua_settop(L, 2);
|
jbe@127
|
2026 if (dynamic) {
|
jbe@127
|
2027 moonbr_listen_init_pool_forkoption("pre_fork", pre_fork, 1);
|
jbe@127
|
2028 moonbr_listen_init_pool_forkoption("min_fork", min_fork, pool->pre_fork > 2 ? pool->pre_fork : 2);
|
jbe@127
|
2029 moonbr_listen_init_pool_forkoption("max_fork", max_fork, pool->min_fork > 16 ? pool->min_fork : 16);
|
jbe@127
|
2030 if (!moonbr_listen_init_pool_timeoption("fork_delay", fork_delay, 0, 250000)) {
|
jbe@127
|
2031 luaL_error(L, "Option \"fork_delay\" is expected to be a non-negative number");
|
jbe@127
|
2032 }
|
jbe@127
|
2033 if (!moonbr_listen_init_pool_timeoption("fork_error_delay", fork_error_delay, 2, 0)) {
|
jbe@127
|
2034 luaL_error(L, "Option \"fork_error_delay\" is expected to be a non-negative number");
|
jbe@127
|
2035 }
|
jbe@127
|
2036 if (!moonbr_listen_init_pool_timeoption("exit_delay", exit_delay, 60, 0)) {
|
jbe@127
|
2037 luaL_error(L, "Option \"exit_delay\" is expected to be a non-negative number");
|
jbe@127
|
2038 }
|
jbe@127
|
2039 if (timercmp(&pool->fork_error_delay, &pool->fork_delay, <)) {
|
jbe@127
|
2040 pool->fork_error_delay = pool->fork_delay;
|
jbe@127
|
2041 }
|
jbe@127
|
2042 if (!moonbr_listen_init_pool_timeoption("idle_timeout", idle_timeout, 0, 0)) {
|
jbe@127
|
2043 luaL_error(L, "Option \"idle_timeout\" is expected to be a non-negative number");
|
jbe@127
|
2044 }
|
jbe@127
|
2045 } else {
|
jbe@127
|
2046 pool->pre_fork = 0;
|
jbe@127
|
2047 pool->min_fork = pool->listener_count;
|
jbe@127
|
2048 pool->max_fork = pool->listener_count;
|
jbe@0
|
2049 }
|
jbe@0
|
2050 lua_getfield(L, 2, "memory_limit");
|
jbe@0
|
2051 if (!lua_isnil(L, -1)) {
|
jbe@0
|
2052 int isnum;
|
jbe@0
|
2053 lua_Number n;
|
jbe@0
|
2054 n = lua_tonumberx(L, -1, &isnum);
|
jbe@0
|
2055 if (n < 0 || !isnum) {
|
jbe@0
|
2056 luaL_error(L, "Option \"memory_limit\" is expected to be a non-negative number");
|
jbe@0
|
2057 }
|
jbe@0
|
2058 pool->memory_limit = n;
|
jbe@0
|
2059 }
|
jbe@0
|
2060 lua_settop(L, 2);
|
jbe@0
|
2061 lua_getfield(L, 2, "prepare");
|
jbe@0
|
2062 if (!lua_isnil(L, -1) && !lua_isfunction(L, -1)) {
|
jbe@0
|
2063 luaL_error(L, "Option \"prepare\" must be nil or a function");
|
jbe@0
|
2064 }
|
jbe@0
|
2065 lua_rawsetp(L, LUA_REGISTRYINDEX, moonbr_luakey_prepare_func(pool));
|
jbe@0
|
2066 lua_getfield(L, 2, "connect");
|
jbe@0
|
2067 if (!lua_isfunction(L, -1)) {
|
jbe@0
|
2068 luaL_error(L, "Option \"connect\" must be a function; use listen{{...}, {...}, connect=function(socket) ... end, ...}");
|
jbe@0
|
2069 }
|
jbe@0
|
2070 lua_rawsetp(L, LUA_REGISTRYINDEX, moonbr_luakey_connect_func(pool));
|
jbe@0
|
2071 lua_getfield(L, 2, "finish");
|
jbe@0
|
2072 if (!lua_isnil(L, -1) && !lua_isfunction(L, -1)) {
|
jbe@0
|
2073 luaL_error(L, "Option \"finish\" must be nil or a function");
|
jbe@0
|
2074 }
|
jbe@0
|
2075 lua_rawsetp(L, LUA_REGISTRYINDEX, moonbr_luakey_finish_func(pool));
|
jbe@0
|
2076 return 0;
|
jbe@0
|
2077 }
|
jbe@0
|
2078
|
jbe@0
|
2079 static int moonbr_listen(lua_State *L) {
|
jbe@0
|
2080 struct moonbr_pool *pool;
|
jbe@0
|
2081 lua_Integer listener_count;
|
jbe@0
|
2082 if (moonbr_booted) luaL_error(L, "Moonbridge bootup is already complete");
|
jbe@0
|
2083 luaL_checktype(L, 1, LUA_TTABLE);
|
jbe@0
|
2084 listener_count = luaL_len(L, 1);
|
jbe@0
|
2085 if (!listener_count) luaL_error(L, "No listen ports specified; use listen{{proto=..., port=...},...}");
|
jbe@0
|
2086 if (listener_count > 100) luaL_error(L, "Too many listeners");
|
jbe@0
|
2087 pool = moonbr_create_pool(listener_count);
|
jbe@0
|
2088 lua_pushcfunction(L, moonbr_listen_init_pool);
|
jbe@0
|
2089 lua_pushlightuserdata(L, pool);
|
jbe@0
|
2090 lua_pushvalue(L, 1);
|
jbe@0
|
2091 if (lua_pcall(L, 2, 0, 0)) goto moonbr_listen_error;
|
jbe@0
|
2092 {
|
jbe@0
|
2093 int i;
|
jbe@0
|
2094 i = moonbr_start_pool(pool);
|
jbe@0
|
2095 if (i >= 0) {
|
jbe@125
|
2096 lua_pushfstring(L, "Could not initialize listener #%d: %s", i+1, strerror(errno));
|
jbe@125
|
2097 moonbr_listen_error:
|
jbe@125
|
2098 moonbr_destroy_pool(pool);
|
jbe@125
|
2099 lua_pushnil(L);
|
jbe@125
|
2100 lua_rawsetp(L, LUA_REGISTRYINDEX, moonbr_luakey_prepare_func(pool));
|
jbe@125
|
2101 lua_pushnil(L);
|
jbe@125
|
2102 lua_rawsetp(L, LUA_REGISTRYINDEX, moonbr_luakey_connect_func(pool));
|
jbe@125
|
2103 lua_pushnil(L);
|
jbe@125
|
2104 lua_rawsetp(L, LUA_REGISTRYINDEX, moonbr_luakey_finish_func(pool));
|
jbe@125
|
2105 lua_error(L);
|
jbe@0
|
2106 }
|
jbe@0
|
2107 }
|
jbe@0
|
2108 return 0;
|
jbe@0
|
2109 }
|
jbe@0
|
2110
|
jbe@0
|
2111
|
jbe@9
|
2112 /*** Function to modify Lua's library path and/or cpath ***/
|
jbe@9
|
2113
|
jbe@9
|
2114 #if defined(MOONBR_LUA_PATH) || defined(MOONBR_LUA_CPATH)
|
jbe@9
|
2115 static void moonbr_modify_path(lua_State *L, char *key, char *value) {
|
jbe@9
|
2116 int stackbase;
|
jbe@9
|
2117 stackbase = lua_gettop(L);
|
jbe@9
|
2118 lua_getglobal(L, "package");
|
jbe@9
|
2119 lua_getfield(L, stackbase+1, key);
|
jbe@9
|
2120 {
|
jbe@9
|
2121 const char *current_str;
|
jbe@9
|
2122 size_t current_strlen;
|
jbe@9
|
2123 luaL_Buffer buf;
|
jbe@9
|
2124 current_str = lua_tolstring(L, stackbase+2, ¤t_strlen);
|
jbe@9
|
2125 luaL_buffinit(L, &buf);
|
jbe@9
|
2126 if (current_str) {
|
jbe@9
|
2127 lua_pushvalue(L, stackbase+2);
|
jbe@9
|
2128 luaL_addvalue(&buf);
|
jbe@9
|
2129 if (current_strlen && current_str[current_strlen-1] != ';') {
|
jbe@9
|
2130 luaL_addchar(&buf, ';');
|
jbe@9
|
2131 }
|
jbe@9
|
2132 }
|
jbe@9
|
2133 luaL_addstring(&buf, value);
|
jbe@9
|
2134 luaL_pushresult(&buf);
|
jbe@9
|
2135 }
|
jbe@9
|
2136 lua_setfield(L, stackbase+1, key);
|
jbe@9
|
2137 lua_settop(L, stackbase);
|
jbe@9
|
2138 }
|
jbe@9
|
2139 #endif
|
jbe@9
|
2140
|
jbe@9
|
2141
|
jbe@0
|
2142 /*** Main function and command line invokation ***/
|
jbe@0
|
2143
|
jbe@0
|
2144 static void moonbr_usage(int err, const char *cmd) {
|
jbe@0
|
2145 FILE *out;
|
jbe@0
|
2146 out = err ? stderr : stdout;
|
jbe@0
|
2147 if (!cmd) cmd = "moonbridge";
|
jbe@0
|
2148 fprintf(out, "Get this help message: %s {-h|--help}\n", cmd);
|
jbe@0
|
2149 fprintf(out, "Usage: %s \\\n", cmd);
|
jbe@0
|
2150 fprintf(out, " [-b|--background] \\\n");
|
jbe@0
|
2151 fprintf(out, " [-d|--debug] \\\n");
|
jbe@0
|
2152 fprintf(out, " [-f|--logfacility {DAEMON|USER|0|1|...|7}] \\\n");
|
jbe@0
|
2153 fprintf(out, " [-i|--logident <syslog ident> \\\n");
|
jbe@0
|
2154 fprintf(out, " [-l|--logfile <logfile>] \\\n");
|
jbe@0
|
2155 fprintf(out, " [-p|--pidfile <pidfile>] \\\n");
|
jbe@0
|
2156 fprintf(out, " [-s|--stats] \\\n");
|
jbe@2
|
2157 fprintf(out, " -- <Lua script> [<cmdline options for Lua script>]\n");
|
jbe@0
|
2158 exit(err);
|
jbe@0
|
2159 }
|
jbe@0
|
2160
|
jbe@0
|
2161 #define moonbr_usage_error() moonbr_usage(MOONBR_EXITCODE_CMDLINEERROR, argc ? argv[0] : NULL)
|
jbe@0
|
2162
|
jbe@0
|
2163 int main(int argc, char **argv) {
|
jbe@0
|
2164 {
|
jbe@0
|
2165 int daemonize = 0;
|
jbe@0
|
2166 int log_facility = LOG_USER;
|
jbe@0
|
2167 const char *log_ident = "moonbridge";
|
jbe@0
|
2168 const char *log_filename = NULL;
|
jbe@0
|
2169 const char *pid_filename = NULL;
|
jbe@0
|
2170 int option;
|
jbe@0
|
2171 struct option longopts[] = {
|
jbe@0
|
2172 { "background", no_argument, NULL, 'b' },
|
jbe@0
|
2173 { "debug", no_argument, NULL, 'd' },
|
jbe@0
|
2174 { "logfacility", required_argument, NULL, 'f' },
|
jbe@0
|
2175 { "help", no_argument, NULL, 'h' },
|
jbe@0
|
2176 { "logident", required_argument, NULL, 'i' },
|
jbe@0
|
2177 { "logfile", required_argument, NULL, 'l' },
|
jbe@0
|
2178 { "pidfile", required_argument, NULL, 'p' },
|
jbe@0
|
2179 { "stats", no_argument, NULL, 's' }
|
jbe@0
|
2180 };
|
jbe@0
|
2181 while ((option = getopt_long(argc, argv, "bdf:hi:l:p:s", longopts, NULL)) != -1) {
|
jbe@0
|
2182 switch (option) {
|
jbe@0
|
2183 case 'b':
|
jbe@0
|
2184 daemonize = 1;
|
jbe@0
|
2185 break;
|
jbe@0
|
2186 case 'd':
|
jbe@0
|
2187 moonbr_debug = 1;
|
jbe@0
|
2188 moonbr_stat = 1;
|
jbe@0
|
2189 break;
|
jbe@0
|
2190 case 'f':
|
jbe@0
|
2191 if (!strcmp(optarg, "DAEMON")) {
|
jbe@0
|
2192 log_facility = LOG_DAEMON;
|
jbe@0
|
2193 } else if (!strcmp(optarg, "USER")) {
|
jbe@0
|
2194 log_facility = LOG_USER;
|
jbe@0
|
2195 } else if (!strcmp(optarg, "0")) {
|
jbe@0
|
2196 log_facility = LOG_LOCAL0;
|
jbe@0
|
2197 } else if (!strcmp(optarg, "1")) {
|
jbe@0
|
2198 log_facility = LOG_LOCAL1;
|
jbe@0
|
2199 } else if (!strcmp(optarg, "2")) {
|
jbe@0
|
2200 log_facility = LOG_LOCAL2;
|
jbe@0
|
2201 } else if (!strcmp(optarg, "3")) {
|
jbe@0
|
2202 log_facility = LOG_LOCAL3;
|
jbe@0
|
2203 } else if (!strcmp(optarg, "4")) {
|
jbe@0
|
2204 log_facility = LOG_LOCAL4;
|
jbe@0
|
2205 } else if (!strcmp(optarg, "5")) {
|
jbe@0
|
2206 log_facility = LOG_LOCAL5;
|
jbe@0
|
2207 } else if (!strcmp(optarg, "6")) {
|
jbe@0
|
2208 log_facility = LOG_LOCAL6;
|
jbe@0
|
2209 } else if (!strcmp(optarg, "7")) {
|
jbe@0
|
2210 log_facility = LOG_LOCAL7;
|
jbe@0
|
2211 } else {
|
jbe@0
|
2212 moonbr_usage_error();
|
jbe@0
|
2213 }
|
jbe@0
|
2214 moonbr_use_syslog = 1;
|
jbe@0
|
2215 break;
|
jbe@0
|
2216 case 'h':
|
jbe@0
|
2217 moonbr_usage(MOONBR_EXITCODE_GRACEFUL, argv[0]);
|
jbe@0
|
2218 break;
|
jbe@0
|
2219 case 'i':
|
jbe@0
|
2220 log_ident = optarg;
|
jbe@0
|
2221 moonbr_use_syslog = 1;
|
jbe@0
|
2222 break;
|
jbe@0
|
2223 case 'l':
|
jbe@0
|
2224 log_filename = optarg;
|
jbe@0
|
2225 break;
|
jbe@0
|
2226 case 'p':
|
jbe@0
|
2227 pid_filename = optarg;
|
jbe@0
|
2228 break;
|
jbe@0
|
2229 case 's':
|
jbe@0
|
2230 moonbr_stat = 1;
|
jbe@0
|
2231 break;
|
jbe@0
|
2232 default:
|
jbe@0
|
2233 moonbr_usage_error();
|
jbe@0
|
2234 }
|
jbe@0
|
2235 }
|
jbe@2
|
2236 if (argc - optind < 1) moonbr_usage_error();
|
jbe@0
|
2237 if (pid_filename) {
|
jbe@0
|
2238 pid_t otherpid;
|
jbe@0
|
2239 while ((moonbr_pidfh = pidfile_open(pid_filename, 0644, &otherpid)) == NULL) {
|
jbe@0
|
2240 if (errno == EEXIST) {
|
jbe@0
|
2241 if (otherpid == -1) {
|
jbe@0
|
2242 fprintf(stderr, "PID file \"%s\" is already locked\n", pid_filename);
|
jbe@0
|
2243 } else {
|
jbe@0
|
2244 fprintf(stderr, "PID file \"%s\" is already locked by process with PID: %i\n", pid_filename, (int)otherpid);
|
jbe@0
|
2245 }
|
jbe@0
|
2246 exit(MOONBR_EXITCODE_ALREADYRUNNING);
|
jbe@0
|
2247 } else if (errno != EINTR) {
|
jbe@0
|
2248 fprintf(stderr, "Could not write PID file \"%s\": %s\n", pid_filename, strerror(errno));
|
jbe@0
|
2249 exit(MOONBR_EXITCODE_STARTUPERROR);
|
jbe@0
|
2250 }
|
jbe@0
|
2251 }
|
jbe@0
|
2252 }
|
jbe@0
|
2253 if (log_filename) {
|
jbe@0
|
2254 int logfd;
|
jbe@0
|
2255 while (
|
jbe@0
|
2256 ( logfd = flopen(
|
jbe@0
|
2257 log_filename,
|
jbe@0
|
2258 O_WRONLY|O_NONBLOCK|O_CREAT|O_APPEND|O_CLOEXEC,
|
jbe@0
|
2259 0640
|
jbe@0
|
2260 )
|
jbe@0
|
2261 ) < 0
|
jbe@0
|
2262 ) {
|
jbe@0
|
2263 if (errno == EWOULDBLOCK) {
|
jbe@0
|
2264 fprintf(stderr, "Logfile \"%s\" is locked\n", log_filename);
|
jbe@0
|
2265 exit(MOONBR_EXITCODE_ALREADYRUNNING);
|
jbe@0
|
2266 } else if (errno != EINTR) {
|
jbe@0
|
2267 fprintf(stderr, "Could not open logfile \"%s\": %s\n", log_filename, strerror(errno));
|
jbe@0
|
2268 exit(MOONBR_EXITCODE_STARTUPERROR);
|
jbe@0
|
2269 }
|
jbe@0
|
2270 }
|
jbe@0
|
2271 moonbr_logfile = fdopen(logfd, "a");
|
jbe@0
|
2272 if (!moonbr_logfile) {
|
jbe@0
|
2273 fprintf(stderr, "Could not open write stream to logfile \"%s\": %s\n", log_filename, strerror(errno));
|
jbe@0
|
2274 exit(MOONBR_EXITCODE_STARTUPERROR);
|
jbe@0
|
2275 }
|
jbe@0
|
2276 }
|
jbe@0
|
2277 if (daemonize == 0 && !moonbr_logfile) moonbr_logfile = stderr;
|
jbe@0
|
2278 if (moonbr_logfile) setlinebuf(moonbr_logfile);
|
jbe@0
|
2279 else moonbr_use_syslog = 1;
|
jbe@0
|
2280 if (moonbr_use_syslog) openlog(log_ident, LOG_NDELAY | LOG_PID, log_facility);
|
jbe@0
|
2281 if (daemonize) {
|
jbe@0
|
2282 if (daemon(1, 0)) {
|
jbe@0
|
2283 moonbr_log(LOG_ERR, "Could not daemonize moonbridge process");
|
jbe@0
|
2284 moonbr_terminate_error();
|
jbe@0
|
2285 }
|
jbe@0
|
2286 }
|
jbe@0
|
2287 }
|
jbe@0
|
2288 moonbr_log(LOG_NOTICE, "Starting moonbridge server");
|
jbe@0
|
2289 if (moonbr_pidfh && pidfile_write(moonbr_pidfh)) {
|
jbe@0
|
2290 moonbr_log(LOG_ERR, "Could not write pidfile (after locking)");
|
jbe@0
|
2291 }
|
jbe@0
|
2292 {
|
jbe@0
|
2293 lua_State *L;
|
jbe@0
|
2294 L = lua_newstate(moonbr_alloc, NULL);
|
jbe@0
|
2295 if (!L) {
|
jbe@0
|
2296 moonbr_log(LOG_CRIT, "Could not initialize Lua state");
|
jbe@0
|
2297 moonbr_terminate_error();
|
jbe@0
|
2298 }
|
jbe@0
|
2299 lua_atpanic(L, moonbr_lua_panic);
|
jbe@58
|
2300 lua_pushliteral(L, MOONBR_VERSION_STRING);
|
jbe@58
|
2301 lua_setglobal(L, "_MOONBRIDGE_VERSION");
|
jbe@0
|
2302 luaL_openlibs(L);
|
jbe@89
|
2303 luaL_requiref(L, "moonbridge_io", luaopen_moonbridge_io, 1);
|
jbe@89
|
2304 lua_pop(L, 1);
|
jbe@8
|
2305 #ifdef MOONBR_LUA_PATH
|
jbe@9
|
2306 moonbr_modify_path(L, "path", MOONBR_LUA_PATH);
|
jbe@9
|
2307 #endif
|
jbe@9
|
2308 #ifdef MOONBR_LUA_CPATH
|
jbe@9
|
2309 moonbr_modify_path(L, "cpath", MOONBR_LUA_CPATH);
|
jbe@8
|
2310 #endif
|
jbe@0
|
2311 lua_pushcfunction(L, moonbr_timeout);
|
jbe@0
|
2312 lua_setglobal(L, "timeout");
|
jbe@0
|
2313 lua_pushcfunction(L, moonbr_listen);
|
jbe@0
|
2314 lua_setglobal(L, "listen");
|
jbe@17
|
2315 lua_pushcfunction(L, moonbr_addtraceback); /* on stack position 1 */
|
jbe@2
|
2316 moonbr_log(LOG_INFO, "Loading \"%s\"", argv[optind]);
|
jbe@2
|
2317 if (luaL_loadfile(L, argv[optind])) {
|
jbe@2
|
2318 moonbr_log(LOG_ERR, "Error while loading \"%s\": %s", argv[optind], lua_tostring(L, -1));
|
jbe@2
|
2319 moonbr_terminate_error();
|
jbe@2
|
2320 }
|
jbe@2
|
2321 { int i; for (i=optind+1; i<argc; i++) lua_pushstring(L, argv[i]); }
|
jbe@2
|
2322 if (lua_pcall(L, argc-(optind+1), 0, 1)) {
|
jbe@2
|
2323 moonbr_log(LOG_ERR, "Error while executing \"%s\": %s", argv[optind], lua_tostring(L, -1));
|
jbe@2
|
2324 moonbr_terminate_error();
|
jbe@0
|
2325 }
|
jbe@6
|
2326 if (!moonbr_first_pool) {
|
jbe@6
|
2327 moonbr_log(LOG_WARNING, "No listener initialized.");
|
jbe@6
|
2328 moonbr_terminate_error();
|
jbe@6
|
2329 }
|
jbe@0
|
2330 lua_getglobal(L, "listen");
|
jbe@0
|
2331 lua_pushcfunction(L, moonbr_listen);
|
jbe@0
|
2332 if (lua_compare(L, -2, -1, LUA_OPEQ)) {
|
jbe@0
|
2333 lua_pushnil(L);
|
jbe@0
|
2334 lua_setglobal(L, "listen");
|
jbe@0
|
2335 }
|
jbe@0
|
2336 lua_settop(L, 1);
|
jbe@56
|
2337 lua_gc(L, LUA_GCCOLLECT, 0); // collect garbage before forking later
|
jbe@0
|
2338 moonbr_run(L);
|
jbe@0
|
2339 }
|
jbe@0
|
2340 return 0;
|
jbe@0
|
2341 }
|
jbe@0
|
2342
|