moonbridge

annotate moonbridge_io.c @ 209:5f529cb9b5c1

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Avoid compiler warnings on GNU/Linux
author jbe
date Mon Jun 22 21:15:48 2015 +0200 (2015-06-22)
parents 77dc29ce7948
children 7967c1e4f6d1
rev   line source
jbe@209 1
jbe@209 2 #ifndef __has_include
jbe@209 3 #define __has_include(x) 0
jbe@209 4 #endif
jbe@79 5
jbe@137 6 #if defined(__linux__)
jbe@137 7 #define _GNU_SOURCE
jbe@137 8 #endif
jbe@79 9 #include <stdlib.h>
jbe@135 10 #include <stdint.h>
jbe@135 11 #include <string.h>
jbe@135 12 #include <errno.h>
jbe@79 13 #include <unistd.h>
jbe@135 14 #include <signal.h>
jbe@135 15 #include <fcntl.h>
jbe@135 16 #include <sys/stat.h>
jbe@79 17 #include <sys/socket.h>
jbe@111 18 #include <sys/un.h>
jbe@95 19 #include <netinet/in.h>
jbe@95 20 #include <netinet/tcp.h>
jbe@135 21 #include <sys/select.h>
jbe@136 22 #include <time.h>
jbe@135 23 #include <netdb.h>
jbe@107 24 #include <arpa/inet.h>
jbe@205 25 #include <sys/types.h>
jbe@205 26 #include <sys/wait.h>
jbe@209 27 #if defined(__linux__) || __has_include(<bsd/unistd.h>)
jbe@209 28 #include <bsd/unistd.h>
jbe@209 29 #endif
jbe@209 30
jbe@79 31 #include <lua.h>
jbe@79 32 #include <lauxlib.h>
jbe@79 33 #include <lualib.h>
jbe@79 34
jbe@149 35 #include <assert.h>
jbe@149 36
jbe@80 37 #define MOONBR_IO_MAXSTRERRORLEN 80
jbe@85 38 #define MOONBR_IO_READBUFLEN 4096
jbe@80 39 #define MOONBR_IO_WRITEBUFLEN 4096
jbe@80 40
jbe@108 41 #define MOONBR_IO_LISTEN_BACKLOG 1024
jbe@108 42
jbe@80 43 #define moonbr_io_errmsg() \
jbe@80 44 char errmsg[MOONBR_IO_MAXSTRERRORLEN]; \
jbe@80 45 strerror_r(errno, errmsg, MOONBR_IO_MAXSTRERRORLEN)
jbe@80 46
jbe@79 47 #define MOONBR_IO_HANDLE_MT_REGKEY "moonbridge_io_handle"
jbe@79 48 #define MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY "moonbridge_io_handle_public"
jbe@108 49 #define MOONBR_IO_LISTENER_MT_REGKEY "moonbridge_io_listener"
jbe@205 50 #define MOONBR_IO_CHILD_MT_REGKEY "moonbridge_io_child"
jbe@205 51 #define MOONBR_IO_CHILD_PT_REGKEY "moonbridge_io_child_pt"
jbe@79 52
jbe@79 53 typedef struct {
jbe@79 54 int fd;
jbe@107 55 int issock;
jbe@107 56 sa_family_t addrfam;
jbe@94 57 int finished;
jbe@94 58 int closed;
jbe@81 59 int nonblocking;
jbe@95 60 int nopush;
jbe@85 61 int readerr;
jbe@105 62 int readbufin;
jbe@105 63 int readbufout;
jbe@81 64 int writeerr;
jbe@83 65 size_t writeleft;
jbe@132 66 size_t flushedleft;
jbe@83 67 #if LUA_VERSION_NUM >= 503
jbe@83 68 lua_Integer writeqin;
jbe@83 69 lua_Integer writeqout;
jbe@83 70 #else
jbe@83 71 int writeqin;
jbe@83 72 int writeqout;
jbe@83 73 #endif
jbe@83 74 size_t writeqoff;
jbe@103 75 int writebufin;
jbe@103 76 int writebufout;
jbe@85 77 char readbuf[MOONBR_IO_READBUFLEN];
jbe@80 78 char writebuf[MOONBR_IO_WRITEBUFLEN];
jbe@79 79 } moonbr_io_handle_t;
jbe@79 80
jbe@108 81 typedef struct {
jbe@108 82 int fd;
jbe@118 83 sa_family_t addrfam;
jbe@108 84 int nonblocking;
jbe@108 85 } moonbr_io_listener_t;
jbe@108 86
jbe@205 87 typedef struct {
jbe@205 88 pid_t pid;
jbe@205 89 } moonbr_io_child_t;
jbe@205 90
jbe@148 91 static int moonbr_io_yield(lua_State *L) {
jbe@149 92 return lua_yield(L, lua_gettop(L));
jbe@140 93 }
jbe@140 94
jbe@140 95 #if LUA_VERSION_NUM >= 503
jbe@140 96 static int moonbr_io_cont_returnall(lua_State *L, int status, lua_KContext ctx) {
jbe@140 97 #else
jbe@140 98 static int moonbr_io_cont_returnall(lua_State *L) {
jbe@140 99 #endif
jbe@140 100 return lua_gettop(L);
jbe@140 101 }
jbe@140 102
jbe@145 103 #define moonbr_io_yield_wrapper(yieldfunc, callfunc) \
jbe@145 104 static int yieldfunc(lua_State *L) { \
jbe@145 105 int args; \
jbe@145 106 lua_pushcfunction(L, callfunc); \
jbe@145 107 lua_insert(L, 1); \
jbe@145 108 args = lua_gettop(L); \
jbe@148 109 lua_pushcfunction(L, moonbr_io_yield); \
jbe@145 110 lua_insert(L, 3); \
jbe@145 111 lua_callk(L, args, LUA_MULTRET, 0, moonbr_io_cont_returnall); \
jbe@145 112 return lua_gettop(L); \
jbe@145 113 }
jbe@145 114
jbe@81 115 static void moonbr_io_handle_set_nonblocking(lua_State *L, moonbr_io_handle_t *handle, int nonblocking) {
jbe@95 116 int flags;
jbe@95 117 if (handle->nonblocking == nonblocking) return;
jbe@95 118 flags = fcntl(handle->fd, F_GETFL, 0);
jbe@95 119 if (flags == -1) {
jbe@95 120 moonbr_io_errmsg();
jbe@96 121 close(handle->fd);
jbe@96 122 handle->fd = -1;
jbe@96 123 handle->closed = 1;
jbe@95 124 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@81 125 }
jbe@95 126 if (nonblocking) flags |= O_NONBLOCK;
jbe@95 127 else flags &= ~O_NONBLOCK;
jbe@95 128 if (fcntl(handle->fd, F_SETFL, flags) == -1) {
jbe@95 129 moonbr_io_errmsg();
jbe@96 130 close(handle->fd);
jbe@96 131 handle->fd = -1;
jbe@96 132 handle->closed = 1;
jbe@95 133 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@95 134 }
jbe@95 135 handle->nonblocking = nonblocking;
jbe@81 136 }
jbe@81 137
jbe@87 138 static void moonbr_io_handle_set_linger(lua_State *L, moonbr_io_handle_t *handle, int timeout) {
jbe@87 139 struct linger lingerval = { 0, };
jbe@107 140 if (!handle->issock) return;
jbe@87 141 if (timeout >= 0) {
jbe@87 142 lingerval.l_onoff = 1;
jbe@87 143 lingerval.l_linger = timeout;
jbe@87 144 }
jbe@87 145 if (setsockopt(handle->fd, SOL_SOCKET, SO_LINGER, &lingerval, sizeof(lingerval))) {
jbe@87 146 moonbr_io_errmsg();
jbe@96 147 close(handle->fd);
jbe@96 148 handle->fd = -1;
jbe@96 149 handle->closed = 1;
jbe@95 150 luaL_error(L, "Unexpected error while setting SO_LINGER with setsockopt: %s", errmsg);
jbe@87 151 }
jbe@87 152 }
jbe@87 153
jbe@133 154 static inline void moonbr_io_handle_set_nopush(lua_State *L, moonbr_io_handle_t *handle, int nopush) {
jbe@96 155 #if defined(TCP_NOPUSH) || defined(TCP_CORK)
jbe@107 156 if (
jbe@107 157 !(handle->addrfam == AF_INET6 || handle->addrfam == AF_INET) ||
jbe@107 158 handle->nopush == nopush
jbe@107 159 ) return;
jbe@96 160 #if defined(TCP_NOPUSH)
jbe@96 161 if (setsockopt(handle->fd, IPPROTO_TCP, TCP_NOPUSH, &nopush, sizeof(nopush))) {
jbe@104 162 #elif defined(TCP_CORK)
jbe@104 163 if (setsockopt(handle->fd, IPPROTO_TCP, TCP_CORK, &nopush, sizeof(nopush))) {
jbe@104 164 #endif
jbe@96 165 moonbr_io_errmsg();
jbe@96 166 close(handle->fd);
jbe@96 167 handle->fd = -1;
jbe@96 168 handle->closed = 1;
jbe@104 169 #if defined(TCP_NOPUSH)
jbe@96 170 luaL_error(L, "Unexpected error while setting TCP_NOPUSH with setsockopt: %s", errmsg);
jbe@96 171 #elif defined(TCP_CORK)
jbe@95 172 luaL_error(L, "Unexpected error while setting TCP_CORK with setsockopt: %s", errmsg);
jbe@104 173 #endif
jbe@95 174 }
jbe@95 175 handle->nopush = nopush;
jbe@96 176 #else
jbe@96 177 #warning Neither TCP_NOPUSH nor TCP_CORK is available
jbe@96 178 #endif
jbe@95 179 }
jbe@95 180
jbe@86 181 static int moonbr_io_read_impl(lua_State *L, int nonblocking, int drain) {
jbe@85 182 moonbr_io_handle_t *handle;
jbe@85 183 lua_Integer maxread;
jbe@85 184 const char *terminatorstr;
jbe@209 185 size_t terminatorlen = 0; /* initialize to avoid compiler warning */
jbe@193 186 char terminator;
jbe@85 187 luaL_Buffer luabuf;
jbe@85 188 size_t luabufcnt = 0;
jbe@105 189 int remaining;
jbe@85 190 char *terminatorpos;
jbe@103 191 ssize_t bytesread;
jbe@85 192 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@153 193 maxread = luaL_optinteger(L, 2, -1);
jbe@85 194 terminatorstr = luaL_optlstring(L, 3, "", &terminatorlen);
jbe@85 195 if (terminatorlen) {
jbe@85 196 luaL_argcheck(L, terminatorlen == 1, 3, "single byte expected");
jbe@85 197 terminator = terminatorstr[0];
jbe@85 198 }
jbe@86 199 lua_settop(L, 1); /* return handle on drain, terminator string may be garbage collected */
jbe@94 200 if (handle->closed) luaL_error(L, "Attempt to read from a closed I/O handle");
jbe@85 201 if (handle->readerr) {
jbe@85 202 lua_pushnil(L);
jbe@85 203 lua_pushliteral(L, "Previous read error");
jbe@85 204 return 2;
jbe@85 205 }
jbe@143 206 if (handle->fd < 0) {
jbe@143 207 /* fake EOF to simulate shutdown */
jbe@143 208 if (!drain) lua_pushliteral(L, "");
jbe@143 209 else lua_pushinteger(L, 0);
jbe@143 210 lua_pushliteral(L, "eof");
jbe@143 211 return 2;
jbe@143 212 }
jbe@105 213 handle->readerr = 1;
jbe@85 214 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@86 215 if (!drain) luaL_buffinit(L, &luabuf);
jbe@85 216 while (1) {
jbe@105 217 remaining = -1;
jbe@142 218 terminatorpos = NULL;
jbe@105 219 if (
jbe@153 220 maxread >= 0 &&
jbe@143 221 handle->readbufin - handle->readbufout >= (size_t)maxread - luabufcnt
jbe@105 222 ) {
jbe@142 223 remaining = (size_t)maxread - luabufcnt;
jbe@193 224 if (terminatorlen) {
jbe@193 225 terminatorpos = memchr(
jbe@193 226 handle->readbuf + handle->readbufout,
jbe@193 227 terminator,
jbe@193 228 remaining
jbe@193 229 );
jbe@193 230 }
jbe@85 231 } else if (terminatorlen) {
jbe@105 232 terminatorpos = memchr(
jbe@105 233 handle->readbuf + handle->readbufout,
jbe@105 234 terminator,
jbe@105 235 handle->readbufin - handle->readbufout
jbe@105 236 );
jbe@85 237 }
jbe@142 238 if (terminatorpos) remaining = 1 + (
jbe@142 239 terminatorpos - (handle->readbuf + handle->readbufout)
jbe@142 240 );
jbe@105 241 if (remaining >= 0) {
jbe@86 242 if (!drain) {
jbe@105 243 luaL_addlstring(
jbe@105 244 &luabuf,
jbe@105 245 handle->readbuf + handle->readbufout,
jbe@105 246 remaining
jbe@105 247 );
jbe@86 248 luaL_pushresult(&luabuf);
jbe@90 249 } else {
jbe@105 250 lua_pushinteger(L, luabufcnt + remaining);
jbe@86 251 }
jbe@143 252 if (terminatorpos) lua_pushliteral(L, "term");
jbe@143 253 else lua_pushliteral(L, "maxlen");
jbe@105 254 handle->readbufout += remaining;
jbe@105 255 if (handle->readbufout == handle->readbufin) {
jbe@105 256 handle->readbufin = 0;
jbe@143 257 handle->readbufout = 0;
jbe@105 258 }
jbe@104 259 handle->readerr = 0;
jbe@143 260 return 2;
jbe@85 261 }
jbe@105 262 if (!drain) luaL_addlstring(
jbe@105 263 &luabuf,
jbe@105 264 handle->readbuf + handle->readbufout,
jbe@105 265 handle->readbufin - handle->readbufout
jbe@105 266 );
jbe@105 267 luabufcnt += handle->readbufin - handle->readbufout;
jbe@143 268 handle->readbufout = 0;
jbe@85 269 do {
jbe@103 270 bytesread = read(handle->fd, handle->readbuf, MOONBR_IO_READBUFLEN);
jbe@103 271 } while (bytesread < 0 && (errno == EINTR));
jbe@105 272 if (
jbe@105 273 bytesread == 0 || (
jbe@105 274 nonblocking &&
jbe@105 275 bytesread < 0 && (errno == EAGAIN || errno == EWOULDBLOCK)
jbe@105 276 )
jbe@105 277 ) {
jbe@105 278 handle->readbufin = 0;
jbe@143 279 if (!drain) luaL_pushresult(&luabuf);
jbe@143 280 else lua_pushinteger(L, luabufcnt);
jbe@143 281 if (bytesread == 0) lua_pushliteral(L, "eof");
jbe@143 282 else lua_pushliteral(L, "block");
jbe@105 283 handle->readerr = 0;
jbe@143 284 return 2;
jbe@105 285 }
jbe@103 286 if (bytesread < 0) {
jbe@85 287 moonbr_io_errmsg();
jbe@85 288 lua_pushnil(L);
jbe@85 289 lua_pushstring(L, errmsg);
jbe@85 290 return 2;
jbe@85 291 }
jbe@105 292 handle->readbufin = bytesread;
jbe@86 293 }
jbe@85 294 }
jbe@85 295
jbe@85 296 static int moonbr_io_read(lua_State *L) {
jbe@86 297 return moonbr_io_read_impl(L, 0, 0);
jbe@85 298 }
jbe@85 299
jbe@85 300 static int moonbr_io_read_nb(lua_State *L) {
jbe@86 301 return moonbr_io_read_impl(L, 1, 0);
jbe@86 302 }
jbe@86 303
jbe@86 304 static int moonbr_io_drain(lua_State *L) {
jbe@86 305 return moonbr_io_read_impl(L, 0, 1);
jbe@86 306 }
jbe@86 307
jbe@86 308 static int moonbr_io_drain_nb(lua_State *L) {
jbe@86 309 return moonbr_io_read_impl(L, 1, 1);
jbe@85 310 }
jbe@85 311
jbe@140 312 #if LUA_VERSION_NUM >= 503
jbe@140 313 static int moonbr_io_read_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@140 314 #else
jbe@140 315 static int moonbr_io_read_cont(lua_State *L) {
jbe@140 316 #endif
jbe@143 317 lua_Integer remaining;
jbe@143 318 size_t len;
jbe@140 319 #if !(LUA_VERSION_NUM >= 503)
jbe@140 320 int ctx = 0;
jbe@140 321 lua_getctx(L, &ctx);
jbe@140 322 #endif
jbe@140 323 remaining = lua_tointeger(L, 3);
jbe@140 324 while (1) {
jbe@140 325 lua_pushcfunction(L, moonbr_io_read_nb);
jbe@140 326 lua_pushvalue(L, 1);
jbe@140 327 lua_pushvalue(L, 3);
jbe@140 328 lua_pushvalue(L, 4);
jbe@140 329 lua_call(L, 3, 2);
jbe@143 330 if (lua_isnil(L, -2)) return 2;
jbe@143 331 lua_insert(L, -2);
jbe@143 332 len = lua_rawlen(L, -1);
jbe@143 333 if (ctx == 0) {
jbe@143 334 lua_replace(L, 5);
jbe@143 335 ctx = 1;
jbe@143 336 } else if (ctx == 1) {
jbe@143 337 lua_pushvalue(L, 5);
jbe@143 338 lua_newtable(L);
jbe@143 339 lua_replace(L, 5);
jbe@143 340 lua_rawseti(L, 5, 2);
jbe@143 341 lua_rawseti(L, 5, 1);
jbe@143 342 ctx = 2;
jbe@140 343 } else {
jbe@143 344 lua_rawseti(L, 5, lua_rawlen(L, 5) + 1);
jbe@140 345 }
jbe@144 346 if (strcmp(lua_tostring(L, -1), "block") != 0) break;
jbe@144 347 lua_pop(L, 1);
jbe@144 348 if (remaining >= 0 && len) {
jbe@143 349 remaining -= len;
jbe@143 350 lua_pushinteger(L, remaining);
jbe@143 351 lua_replace(L, 3);
jbe@143 352 }
jbe@140 353 lua_pushvalue(L, 2);
jbe@152 354 lua_callk(L, 0, 0, ctx, moonbr_io_read_cont);
jbe@140 355 }
jbe@140 356 if (ctx == 1) {
jbe@140 357 lua_pushvalue(L, 5);
jbe@140 358 } else {
jbe@140 359 luaL_Buffer buf;
jbe@140 360 lua_Integer i, chunkcount;
jbe@140 361 chunkcount = lua_rawlen(L, 5);
jbe@140 362 luaL_buffinit(L, &buf);
jbe@140 363 for (i=1; i<=chunkcount && i>0; i++) {
jbe@140 364 lua_rawgeti(L, 5, i);
jbe@140 365 luaL_addvalue(&buf);
jbe@140 366 }
jbe@140 367 luaL_pushresult(&buf);
jbe@140 368 }
jbe@143 369 lua_pushvalue(L, -2);
jbe@143 370 return 2;
jbe@140 371 }
jbe@140 372
jbe@140 373 static int moonbr_io_read_call(lua_State *L) {
jbe@140 374 lua_settop(L, 4);
jbe@140 375 lua_pushnil(L);
jbe@140 376 #if LUA_VERSION_NUM >= 503
jbe@140 377 return moonbr_io_read_cont(L, 0, 0);
jbe@140 378 #else
jbe@140 379 return moonbr_io_read_cont(L);
jbe@140 380 #endif
jbe@140 381 }
jbe@140 382
jbe@145 383 moonbr_io_yield_wrapper(moonbr_io_read_yield, moonbr_io_read_call);
jbe@140 384
jbe@144 385 #if LUA_VERSION_NUM >= 503
jbe@144 386 static int moonbr_io_drain_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@144 387 #else
jbe@144 388 static int moonbr_io_drain_cont(lua_State *L) {
jbe@144 389 #endif
jbe@144 390 lua_Integer remaining, len;
jbe@144 391 size_t totallen = 0;
jbe@144 392 #if !(LUA_VERSION_NUM >= 503)
jbe@144 393 int ctx = 0;
jbe@144 394 lua_getctx(L, &ctx);
jbe@144 395 #endif
jbe@144 396 remaining = lua_tointeger(L, 3);
jbe@144 397 while (1) {
jbe@144 398 lua_pushcfunction(L, moonbr_io_drain_nb);
jbe@144 399 lua_pushvalue(L, 1);
jbe@144 400 lua_pushvalue(L, 3);
jbe@144 401 lua_pushvalue(L, 4);
jbe@144 402 lua_call(L, 3, 2);
jbe@144 403 if (lua_isnil(L, -2)) return 2;
jbe@144 404 lua_insert(L, -2);
jbe@144 405 len = lua_tointeger(L, -1);
jbe@144 406 lua_pop(L, 1);
jbe@144 407 totallen += len;
jbe@144 408 if (strcmp(lua_tostring(L, -1), "block") != 0) break;
jbe@144 409 lua_pop(L, 1);
jbe@144 410 if (remaining >= 0 && len) {
jbe@144 411 remaining -= len;
jbe@144 412 lua_pushinteger(L, remaining);
jbe@144 413 lua_replace(L, 3);
jbe@144 414 }
jbe@144 415 lua_pushvalue(L, 2);
jbe@152 416 lua_callk(L, 0, 0, ctx, moonbr_io_drain_cont);
jbe@144 417 }
jbe@144 418 lua_pushinteger(L, totallen);
jbe@144 419 lua_pushvalue(L, -2);
jbe@144 420 return 2;
jbe@144 421 }
jbe@144 422
jbe@144 423 static int moonbr_io_drain_call(lua_State *L) {
jbe@144 424 #if LUA_VERSION_NUM >= 503
jbe@144 425 return moonbr_io_drain_cont(L, 0, 0);
jbe@144 426 #else
jbe@144 427 return moonbr_io_drain_cont(L);
jbe@144 428 #endif
jbe@144 429 }
jbe@144 430
jbe@145 431 moonbr_io_yield_wrapper(moonbr_io_drain_yield, moonbr_io_drain_call);
jbe@144 432
jbe@81 433 static int moonbr_io_write_impl(lua_State *L, int nonblocking, int flush) {
jbe@80 434 moonbr_io_handle_t *handle;
jbe@80 435 int i, top;
jbe@80 436 const char *str;
jbe@92 437 size_t strlen;
jbe@103 438 ssize_t written;
jbe@80 439 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 440 if (handle->closed) luaL_error(L, "Attempt to write to a closed I/O handle");
jbe@94 441 if (handle->finished) luaL_error(L, "Attempt to write to a finished I/O handle");
jbe@81 442 if (handle->writeerr) {
jbe@80 443 lua_pushnil(L);
jbe@80 444 lua_pushliteral(L, "Previous write error");
jbe@80 445 return 2;
jbe@80 446 }
jbe@103 447 handle->writeerr = 1;
jbe@81 448 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@84 449 top = lua_gettop(L);
jbe@81 450 lua_getuservalue(L, 1);
jbe@103 451 lua_getfield(L, -1, "writequeue");
jbe@84 452 for (i=2; i<=top; i++) {
jbe@84 453 luaL_checklstring(L, i, &strlen);
jbe@84 454 lua_pushvalue(L, i);
jbe@84 455 lua_rawseti(L, -2, handle->writeqin++);
jbe@84 456 handle->writeleft += strlen;
jbe@81 457 }
jbe@132 458 if (flush) handle->flushedleft = handle->writeleft;
jbe@83 459 while (handle->writeqout != handle->writeqin) {
jbe@83 460 lua_rawgeti(L, -1, handle->writeqout);
jbe@81 461 str = lua_tolstring(L, -1, &strlen);
jbe@92 462 while (handle->writeqoff < strlen) {
jbe@103 463 if (
jbe@132 464 strlen - handle->writeqoff <
jbe@103 465 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103 466 ) {
jbe@103 467 memcpy(
jbe@103 468 handle->writebuf + handle->writebufin,
jbe@103 469 str + handle->writeqoff,
jbe@103 470 strlen - handle->writeqoff
jbe@103 471 );
jbe@103 472 handle->writebufin += strlen - handle->writeqoff;
jbe@80 473 break;
jbe@80 474 } else {
jbe@103 475 memcpy(
jbe@103 476 handle->writebuf + handle->writebufin,
jbe@103 477 str + handle->writeqoff,
jbe@103 478 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103 479 );
jbe@103 480 handle->writeqoff += MOONBR_IO_WRITEBUFLEN - handle->writebufin;
jbe@103 481 while (handle->writebufout < MOONBR_IO_WRITEBUFLEN) {
jbe@133 482 moonbr_io_handle_set_nopush(L, handle, 1);
jbe@103 483 written = write(
jbe@103 484 handle->fd,
jbe@103 485 handle->writebuf + handle->writebufout,
jbe@103 486 MOONBR_IO_WRITEBUFLEN - handle->writebufout
jbe@103 487 );
jbe@103 488 if (written < 0) {
jbe@81 489 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@81 490 goto moonbr_io_write_impl_block;
jbe@81 491 } else if (errno != EINTR) {
jbe@80 492 moonbr_io_errmsg();
jbe@80 493 lua_pushnil(L);
jbe@80 494 lua_pushstring(L, errmsg);
jbe@80 495 return 2;
jbe@80 496 }
jbe@103 497 } else {
jbe@103 498 handle->writebufout += written;
jbe@103 499 handle->writeleft -= written;
jbe@133 500 if (handle->flushedleft) {
jbe@133 501 if (written >= handle->flushedleft) {
jbe@133 502 handle->flushedleft = 0;
jbe@133 503 moonbr_io_handle_set_nopush(L, handle, 0);
jbe@133 504 } else {
jbe@133 505 handle->flushedleft -= written;
jbe@133 506 }
jbe@133 507 }
jbe@80 508 }
jbe@80 509 }
jbe@103 510 handle->writebufin = 0;
jbe@103 511 handle->writebufout = 0;
jbe@80 512 }
jbe@80 513 }
jbe@81 514 handle->writeqoff = 0;
jbe@81 515 lua_pop(L, 1);
jbe@81 516 lua_pushnil(L);
jbe@83 517 lua_rawseti(L, -2, handle->writeqout++);
jbe@80 518 }
jbe@132 519 while (handle->flushedleft) {
jbe@133 520 moonbr_io_handle_set_nopush(L, handle, 1);
jbe@132 521 written = write(
jbe@132 522 handle->fd,
jbe@132 523 handle->writebuf + handle->writebufout,
jbe@132 524 handle->writebufin - handle->writebufout
jbe@132 525 );
jbe@132 526 if (written < 0) {
jbe@132 527 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@132 528 goto moonbr_io_write_impl_block;
jbe@132 529 } else if (errno != EINTR) {
jbe@132 530 moonbr_io_errmsg();
jbe@132 531 lua_pushnil(L);
jbe@132 532 lua_pushstring(L, errmsg);
jbe@132 533 return 2;
jbe@81 534 }
jbe@132 535 } else {
jbe@132 536 handle->writebufout += written;
jbe@132 537 handle->writeleft -= written;
jbe@133 538 if (handle->flushedleft) {
jbe@133 539 if (written >= handle->flushedleft) {
jbe@133 540 handle->flushedleft = 0;
jbe@133 541 moonbr_io_handle_set_nopush(L, handle, 0);
jbe@133 542 } else {
jbe@133 543 handle->flushedleft -= written;
jbe@133 544 }
jbe@133 545 }
jbe@81 546 }
jbe@132 547 }
jbe@132 548 if (handle->writebufout == handle->writebufin) {
jbe@103 549 handle->writebufin = 0;
jbe@103 550 handle->writebufout = 0;
jbe@81 551 }
jbe@103 552 if (nonblocking) lua_pushinteger(L, 0);
jbe@103 553 else lua_pushvalue(L, 1);
jbe@103 554 handle->writeerr = 0;
jbe@80 555 return 1;
jbe@81 556 moonbr_io_write_impl_block:
jbe@91 557 lua_pushinteger(L, handle->writeleft);
jbe@103 558 handle->writeerr = 0;
jbe@81 559 return 1;
jbe@81 560 }
jbe@81 561
jbe@81 562 static int moonbr_io_write(lua_State *L) {
jbe@81 563 return moonbr_io_write_impl(L, 0, 0);
jbe@81 564 }
jbe@81 565
jbe@81 566 static int moonbr_io_write_nb(lua_State *L) {
jbe@81 567 return moonbr_io_write_impl(L, 1, 0);
jbe@80 568 }
jbe@80 569
jbe@80 570 static int moonbr_io_flush(lua_State *L) {
jbe@81 571 return moonbr_io_write_impl(L, 0, 1);
jbe@81 572 }
jbe@81 573
jbe@81 574 static int moonbr_io_flush_nb(lua_State *L) {
jbe@81 575 return moonbr_io_write_impl(L, 1, 1);
jbe@80 576 }
jbe@80 577
jbe@145 578 #if LUA_VERSION_NUM >= 503
jbe@145 579 static int moonbr_io_write_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@145 580 #else
jbe@145 581 static int moonbr_io_write_cont(lua_State *L) {
jbe@145 582 #endif
jbe@145 583 while (1) {
jbe@145 584 lua_pushcfunction(L, moonbr_io_write_nb);
jbe@145 585 lua_pushvalue(L, 1);
jbe@145 586 lua_call(L, 1, 2);
jbe@145 587 if (lua_isnil(L, -2)) return 2;
jbe@145 588 if (!lua_tointeger(L, -2)) {
jbe@145 589 lua_pushvalue(L, 1);
jbe@145 590 return 1;
jbe@145 591 }
jbe@145 592 lua_pop(L, 2);
jbe@145 593 lua_pushvalue(L, 2);
jbe@152 594 lua_callk(L, 0, 0, 0, moonbr_io_write_cont);
jbe@145 595 }
jbe@145 596 }
jbe@145 597
jbe@145 598 static int moonbr_io_write_call(lua_State *L) {
jbe@145 599 lua_pushcfunction(L, moonbr_io_write_nb);
jbe@145 600 lua_insert(L, 3);
jbe@145 601 lua_pushvalue(L, 1);
jbe@145 602 lua_insert(L, 4);
jbe@145 603 lua_call(L, lua_gettop(L) - 3, 2);
jbe@145 604 if (lua_isnil(L, -2)) return 2;
jbe@145 605 if (!lua_tointeger(L, -2)) {
jbe@145 606 lua_pushvalue(L, 1);
jbe@145 607 return 1;
jbe@145 608 }
jbe@145 609 #if LUA_VERSION_NUM >= 503
jbe@145 610 return moonbr_io_write_cont(L, 0, 0);
jbe@145 611 #else
jbe@145 612 return moonbr_io_write_cont(L);
jbe@145 613 #endif
jbe@145 614 }
jbe@145 615
jbe@145 616 moonbr_io_yield_wrapper(moonbr_io_write_yield, moonbr_io_write_call);
jbe@145 617
jbe@145 618 static int moonbr_io_flush_call(lua_State *L) {
jbe@145 619 lua_pushcfunction(L, moonbr_io_flush_nb);
jbe@145 620 lua_insert(L, 3);
jbe@145 621 lua_pushvalue(L, 1);
jbe@145 622 lua_insert(L, 4);
jbe@145 623 lua_call(L, lua_gettop(L) - 3, 2);
jbe@145 624 if (lua_isnil(L, -2)) return 2;
jbe@145 625 if (!lua_tointeger(L, -2)) {
jbe@145 626 lua_pushvalue(L, 1);
jbe@145 627 return 1;
jbe@145 628 }
jbe@145 629 #if LUA_VERSION_NUM >= 503
jbe@145 630 return moonbr_io_write_cont(L, 0, 0);
jbe@145 631 #else
jbe@145 632 return moonbr_io_write_cont(L);
jbe@145 633 #endif
jbe@145 634 }
jbe@145 635
jbe@145 636 moonbr_io_yield_wrapper(moonbr_io_flush_yield, moonbr_io_flush_call);
jbe@145 637
jbe@88 638 static int moonbr_io_finish(lua_State *L) {
jbe@88 639 moonbr_io_handle_t *handle;
jbe@88 640 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 641 if (handle->closed) luaL_error(L, "Attempt to finish a closed I/O handle");
jbe@94 642 if (handle->finished) luaL_error(L, "Attempt to finish a finished I/O handle");
jbe@94 643 if (handle->writeleft) {
jbe@94 644 lua_pushcfunction(L, moonbr_io_flush);
jbe@94 645 lua_pushvalue(L, 1);
jbe@116 646 if (lua_pcall(L, 1, 2, 0)) {
jbe@116 647 handle->finished = 1;
jbe@116 648 lua_error(L);
jbe@116 649 }
jbe@94 650 if (!lua_toboolean(L, -2)) {
jbe@94 651 handle->finished = 1;
jbe@94 652 return 2;
jbe@88 653 }
jbe@94 654 }
jbe@94 655 handle->finished = 1;
jbe@107 656 if (handle->addrfam == AF_INET6 || handle->addrfam == AF_INET) {
jbe@88 657 if (shutdown(handle->fd, SHUT_WR)) {
jbe@88 658 moonbr_io_errmsg();
jbe@88 659 lua_pushnil(L);
jbe@88 660 lua_pushstring(L, errmsg);
jbe@88 661 return 2;
jbe@88 662 }
jbe@94 663 } else {
jbe@94 664 if (close(handle->fd)) {
jbe@94 665 moonbr_io_errmsg();
jbe@94 666 handle->fd = -1;
jbe@94 667 lua_pushnil(L);
jbe@94 668 lua_pushstring(L, errmsg);
jbe@94 669 return 2;
jbe@94 670 }
jbe@94 671 handle->fd = -1; /* fake EOF on read */
jbe@88 672 }
jbe@88 673 lua_pushboolean(L, 1);
jbe@88 674 return 1;
jbe@88 675 }
jbe@88 676
jbe@94 677 static int moonbr_io_close_impl(lua_State *L, int reset) {
jbe@83 678 moonbr_io_handle_t *handle;
jbe@83 679 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 680 if (handle->closed) luaL_error(L, "Attempt to close a closed I/O handle");
jbe@94 681 if (!reset) {
jbe@87 682 if (handle->writeleft) {
jbe@87 683 lua_pushcfunction(L, moonbr_io_flush);
jbe@87 684 lua_pushvalue(L, 1);
jbe@116 685 if (lua_pcall(L, 1, 2, 0)) {
jbe@129 686 handle->closed = 1;
jbe@116 687 close(handle->fd);
jbe@116 688 handle->fd = -1;
jbe@116 689 lua_error(L);
jbe@116 690 }
jbe@129 691 handle->closed = 1;
jbe@87 692 if (!lua_toboolean(L, -2)) {
jbe@87 693 close(handle->fd);
jbe@87 694 handle->fd = -1;
jbe@87 695 return 2;
jbe@87 696 }
jbe@129 697 } else {
jbe@129 698 handle->closed = 1;
jbe@129 699 moonbr_io_handle_set_linger(L, handle, -1);
jbe@83 700 }
jbe@129 701 } else {
jbe@129 702 handle->closed = 1;
jbe@83 703 }
jbe@94 704 if (handle->fd >= 0) {
jbe@94 705 if (close(handle->fd)) {
jbe@94 706 moonbr_io_errmsg();
jbe@94 707 handle->fd = -1;
jbe@94 708 lua_pushnil(L);
jbe@94 709 lua_pushstring(L, errmsg);
jbe@94 710 return 2;
jbe@94 711 }
jbe@104 712 handle->fd = -1;
jbe@83 713 }
jbe@83 714 lua_pushboolean(L, 1);
jbe@83 715 return 1;
jbe@84 716
jbe@83 717 }
jbe@83 718
jbe@94 719 static int moonbr_io_close(lua_State *L) {
jbe@94 720 return moonbr_io_close_impl(L, 0);
jbe@94 721 }
jbe@94 722
jbe@84 723 static int moonbr_io_reset(lua_State *L) {
jbe@94 724 return moonbr_io_close_impl(L, 1);
jbe@84 725 }
jbe@84 726
jbe@108 727 static int moonbr_io_handlegc(lua_State *L) {
jbe@88 728 moonbr_io_handle_t *handle;
jbe@88 729 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@88 730 if (handle->fd >= 0) {
jbe@88 731 lua_pushcfunction(L, moonbr_io_close);
jbe@88 732 lua_pushvalue(L, 1);
jbe@88 733 lua_pushinteger(L, 0);
jbe@88 734 lua_call(L, 2, 0);
jbe@88 735 }
jbe@88 736 return 0;
jbe@88 737 }
jbe@88 738
jbe@100 739 void moonbr_io_closehandle(lua_State *L, int idx, int reset) {
jbe@88 740 moonbr_io_handle_t *handle;
jbe@88 741 handle = luaL_checkudata(L, idx, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@100 742 if (!handle->closed) {
jbe@100 743 lua_pushcfunction(L, reset ? moonbr_io_reset : moonbr_io_close);
jbe@100 744 lua_pushvalue(L, idx < 0 ? idx-1 : idx);
jbe@100 745 lua_call(L, 1, 0);
jbe@88 746 }
jbe@88 747 }
jbe@88 748
jbe@208 749 static int moonbr_io_pushhandle_impl(lua_State *L) {
jbe@208 750 int *fd;
jbe@79 751 moonbr_io_handle_t *handle;
jbe@107 752 struct sockaddr addr;
jbe@107 753 socklen_t addrlen;
jbe@208 754 fd = lua_touserdata(L, 1);
jbe@79 755 handle = lua_newuserdata(L, sizeof(moonbr_io_handle_t));
jbe@208 756 handle->fd = -1; /* avoid closing incomplete handle */
jbe@107 757 addrlen = sizeof(addr);
jbe@208 758 if (getsockname(*fd, &addr, &addrlen)) {
jbe@107 759 if (errno != ENOTSOCK) {
jbe@107 760 moonbr_io_errmsg();
jbe@107 761 luaL_error(L, "Unexpected error when examining socket: %s", errmsg);
jbe@107 762 }
jbe@107 763 handle->issock = 0;
jbe@107 764 } else {
jbe@107 765 handle->issock = 1;
jbe@107 766 handle->addrfam = addr.sa_family;
jbe@107 767 }
jbe@94 768 handle->finished = 0;
jbe@94 769 handle->closed = 0;
jbe@81 770 handle->nonblocking = -1;
jbe@95 771 handle->nopush = -1;
jbe@85 772 handle->readerr = 0;
jbe@105 773 handle->readbufin = 0;
jbe@105 774 handle->readbufout = 0;
jbe@81 775 handle->writeerr = 0;
jbe@81 776 handle->writeleft = 0;
jbe@132 777 handle->flushedleft = 0;
jbe@83 778 handle->writeqin = 0;
jbe@83 779 handle->writeqout = 0;
jbe@81 780 handle->writeqoff = 0;
jbe@103 781 handle->writebufin = 0;
jbe@103 782 handle->writebufout = 0;
jbe@208 783 handle->fd = *fd; /* required for set_linger call */
jbe@87 784 moonbr_io_handle_set_linger(L, handle, 0);
jbe@208 785 handle->fd = -1; /* avoid closing incomplete handle */
jbe@79 786 luaL_getmetatable(L, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 787 lua_setmetatable(L, -2);
jbe@79 788 lua_newtable(L); // uservalue
jbe@81 789 lua_newtable(L);
jbe@103 790 lua_setfield(L, -2, "writequeue");
jbe@79 791 lua_newtable(L); // public
jbe@107 792 if (handle->addrfam == AF_INET6) {
jbe@107 793 struct sockaddr_in6 addr_in6;
jbe@107 794 char addrstrbuf[INET6_ADDRSTRLEN];
jbe@107 795 const char *addrstr;
jbe@107 796 addrlen = sizeof(addr_in6);
jbe@208 797 if (getsockname(*fd, (struct sockaddr *)&addr_in6, &addrlen)) {
jbe@107 798 moonbr_io_errmsg();
jbe@107 799 luaL_error(L, "Could not determine local IP address/port: %s", errmsg);
jbe@107 800 }
jbe@107 801 if (addrlen > sizeof(addr_in6)) {
jbe@107 802 luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");
jbe@107 803 }
jbe@107 804 addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 805 if (!addrstr) {
jbe@107 806 moonbr_io_errmsg();
jbe@107 807 luaL_error(L, "Could not format local IP address: %s", errmsg);
jbe@107 808 } else {
jbe@107 809 lua_pushstring(L, addrstr);
jbe@107 810 lua_setfield(L, -2, "local_ip6");
jbe@107 811 }
jbe@107 812 lua_pushinteger(L, ntohs(addr_in6.sin6_port));
jbe@107 813 lua_setfield(L, -2, "local_tcpport");
jbe@208 814 if (getpeername(*fd, (struct sockaddr *)&addr_in6, &addrlen)) {
jbe@107 815 moonbr_io_errmsg();
jbe@107 816 luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);
jbe@107 817 }
jbe@107 818 if (addrlen > sizeof(addr_in6)) {
jbe@107 819 luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");
jbe@107 820 }
jbe@107 821 addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 822 if (!addrstr) {
jbe@107 823 moonbr_io_errmsg();
jbe@107 824 luaL_error(L, "Could not format remote IP address: %s", errmsg);
jbe@107 825 } else {
jbe@107 826 lua_pushstring(L, addrstr);
jbe@107 827 lua_setfield(L, -2, "remote_ip6");
jbe@107 828 }
jbe@107 829 lua_pushinteger(L, ntohs(addr_in6.sin6_port));
jbe@107 830 lua_setfield(L, -2, "remote_tcpport");
jbe@107 831 } else if (handle->addrfam == AF_INET) {
jbe@107 832 struct sockaddr_in addr_in;
jbe@107 833 char addrstrbuf[INET_ADDRSTRLEN];
jbe@107 834 const char *addrstr;
jbe@107 835 addrlen = sizeof(addr_in);
jbe@208 836 if (getsockname(*fd, (struct sockaddr *)&addr_in, &addrlen)) {
jbe@107 837 moonbr_io_errmsg();
jbe@107 838 luaL_error(L, "Could not determine local IP address/port: %s", errmsg);
jbe@107 839 }
jbe@107 840 if (addrlen > sizeof(addr_in)) {
jbe@107 841 luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");
jbe@107 842 }
jbe@107 843 addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 844 if (!addrstr) {
jbe@107 845 moonbr_io_errmsg();
jbe@107 846 luaL_error(L, "Could not format local IP address: %s", errmsg);
jbe@107 847 } else {
jbe@107 848 lua_pushstring(L, addrstr);
jbe@107 849 lua_setfield(L, -2, "local_ip4");
jbe@107 850 }
jbe@107 851 lua_pushinteger(L, ntohs(addr_in.sin_port));
jbe@107 852 lua_setfield(L, -2, "local_tcpport");
jbe@208 853 if (getpeername(*fd, (struct sockaddr *)&addr_in, &addrlen)) {
jbe@107 854 moonbr_io_errmsg();
jbe@107 855 luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);
jbe@107 856 }
jbe@107 857 if (addrlen > sizeof(addr_in)) {
jbe@107 858 luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");
jbe@107 859 }
jbe@107 860 addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 861 if (!addrstr) {
jbe@107 862 moonbr_io_errmsg();
jbe@107 863 luaL_error(L, "Could not format remote IP address: %s", errmsg);
jbe@107 864 } else {
jbe@107 865 lua_pushstring(L, addrstr);
jbe@107 866 lua_setfield(L, -2, "remote_ip4");
jbe@107 867 }
jbe@107 868 lua_pushinteger(L, ntohs(addr_in.sin_port));
jbe@107 869 lua_setfield(L, -2, "remote_tcpport");
jbe@107 870 }
jbe@79 871 luaL_getmetatable(L, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 872 lua_setmetatable(L, -2);
jbe@79 873 lua_setfield(L, -2, "public");
jbe@79 874 lua_setuservalue(L, -2);
jbe@208 875 handle->fd = *fd;
jbe@208 876 *fd = -1; /* closing is now handled by garbage collection */
jbe@208 877 return 1;
jbe@208 878 }
jbe@208 879
jbe@208 880 void moonbr_io_pushhandle(lua_State *L, int fd) {
jbe@208 881 lua_pushcfunction(L, moonbr_io_pushhandle_impl);
jbe@208 882 lua_pushlightuserdata(L, &fd);
jbe@208 883 if (lua_pcall(L, 1, 1, 0)) {
jbe@208 884 if (fd != -1) close(fd);
jbe@208 885 lua_error(L);
jbe@208 886 }
jbe@79 887 }
jbe@79 888
jbe@79 889 static int moonbr_io_handleindex(lua_State *L) {
jbe@80 890 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@205 891 luaL_checkany(L, 2);
jbe@79 892 lua_getuservalue(L, 1);
jbe@79 893 lua_getfield(L, -1, "public");
jbe@79 894 lua_pushvalue(L, 2);
jbe@79 895 lua_gettable(L, -2);
jbe@79 896 return 1;
jbe@79 897 }
jbe@79 898
jbe@79 899 static int moonbr_io_handlenewindex(lua_State *L) {
jbe@80 900 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@205 901 luaL_checkany(L, 2);
jbe@205 902 luaL_checkany(L, 3);
jbe@79 903 lua_getuservalue(L, 1);
jbe@79 904 lua_getfield(L, -1, "public");
jbe@79 905 lua_pushvalue(L, 2);
jbe@79 906 lua_pushvalue(L, 3);
jbe@79 907 lua_settable(L, -3);
jbe@79 908 return 0;
jbe@79 909 }
jbe@79 910
jbe@111 911 static int moonbr_io_localconnect_impl(lua_State *L, int nonblocking) {
jbe@111 912 const char *path;
jbe@111 913 struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };
jbe@111 914 const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@111 915 (void *)sockaddr.sun_path - (void *)&sockaddr
jbe@111 916 ) - 1; /* one byte for termination */
jbe@111 917 int sock;
jbe@111 918 path = luaL_checkstring(L, 1);
jbe@111 919 if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);
jbe@111 920 strcpy(sockaddr.sun_path, path);
jbe@111 921 sock = socket(
jbe@111 922 PF_LOCAL,
jbe@111 923 SOCK_STREAM | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@111 924 0
jbe@111 925 );
jbe@111 926 if (sock < 0) {
jbe@111 927 moonbr_io_errmsg();
jbe@111 928 lua_pushnil(L);
jbe@111 929 lua_pushstring(L, errmsg);
jbe@111 930 return 2;
jbe@111 931 }
jbe@111 932 if (connect(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
jbe@111 933 if (!nonblocking && errno == EINTR) {
jbe@111 934 moonbr_io_errmsg();
jbe@111 935 close(sock);
jbe@111 936 lua_pushnil(L);
jbe@111 937 lua_pushstring(L, errmsg);
jbe@111 938 return 2;
jbe@111 939 } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@111 940 moonbr_io_errmsg();
jbe@111 941 lua_pushnil(L);
jbe@111 942 lua_pushstring(L, errmsg);
jbe@111 943 return 2;
jbe@111 944 }
jbe@111 945 }
jbe@111 946 moonbr_io_pushhandle(L, sock);
jbe@111 947 return 1;
jbe@111 948 }
jbe@111 949
jbe@111 950 static int moonbr_io_localconnect(lua_State *L) {
jbe@111 951 return moonbr_io_localconnect_impl(L, 0);
jbe@111 952 }
jbe@111 953
jbe@111 954 static int moonbr_io_localconnect_nb(lua_State *L) {
jbe@111 955 return moonbr_io_localconnect_impl(L, 1);
jbe@111 956 }
jbe@111 957
jbe@99 958 static int moonbr_io_tcpconnect_impl(lua_State *L, int nonblocking) {
jbe@98 959 const char *host, *port;
jbe@98 960 struct addrinfo hints = { 0, };
jbe@98 961 struct addrinfo *res, *addrinfo;
jbe@98 962 int errcode;
jbe@98 963 int sock;
jbe@98 964 host = luaL_checkstring(L, 1);
jbe@98 965 port = luaL_checkstring(L, 2);
jbe@98 966 hints.ai_family = AF_UNSPEC;
jbe@98 967 hints.ai_socktype = SOCK_STREAM;
jbe@98 968 hints.ai_protocol = IPPROTO_TCP;
jbe@98 969 hints.ai_flags = AI_ADDRCONFIG;
jbe@98 970 errcode = getaddrinfo(host, port, &hints, &res);
jbe@98 971 if (errcode) {
jbe@102 972 freeaddrinfo(res);
jbe@98 973 if (errcode == EAI_SYSTEM) {
jbe@98 974 moonbr_io_errmsg();
jbe@98 975 lua_pushnil(L);
jbe@98 976 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@98 977 } else {
jbe@98 978 lua_pushnil(L);
jbe@98 979 lua_pushstring(L, gai_strerror(errcode));
jbe@98 980 }
jbe@98 981 return 2;
jbe@98 982 }
jbe@98 983 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 984 if (addrinfo->ai_family == AF_INET6) goto moonbr_io_tcpconnect_found;
jbe@98 985 }
jbe@98 986 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 987 if (addrinfo->ai_family == AF_INET) goto moonbr_io_tcpconnect_found;
jbe@98 988 }
jbe@98 989 addrinfo = res;
jbe@98 990 moonbr_io_tcpconnect_found:
jbe@99 991 sock = socket(
jbe@134 992 addrinfo->ai_family, /* NOTE: not correctly using PF_* but AF_* constants here */
jbe@99 993 addrinfo->ai_socktype | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@99 994 addrinfo->ai_protocol
jbe@99 995 );
jbe@98 996 if (sock < 0) {
jbe@98 997 moonbr_io_errmsg();
jbe@108 998 freeaddrinfo(res);
jbe@98 999 lua_pushnil(L);
jbe@98 1000 lua_pushstring(L, errmsg);
jbe@108 1001 return 2;
jbe@98 1002 }
jbe@98 1003 if (connect(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@108 1004 freeaddrinfo(res);
jbe@99 1005 if (!nonblocking && errno == EINTR) {
jbe@99 1006 moonbr_io_errmsg();
jbe@99 1007 close(sock);
jbe@99 1008 lua_pushnil(L);
jbe@99 1009 lua_pushstring(L, errmsg);
jbe@99 1010 return 2;
jbe@99 1011 } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@99 1012 moonbr_io_errmsg();
jbe@99 1013 lua_pushnil(L);
jbe@99 1014 lua_pushstring(L, errmsg);
jbe@99 1015 return 2;
jbe@99 1016 }
jbe@108 1017 } else {
jbe@108 1018 freeaddrinfo(res);
jbe@98 1019 }
jbe@107 1020 moonbr_io_pushhandle(L, sock);
jbe@98 1021 return 1;
jbe@98 1022 }
jbe@98 1023
jbe@99 1024 static int moonbr_io_tcpconnect(lua_State *L) {
jbe@99 1025 return moonbr_io_tcpconnect_impl(L, 0);
jbe@99 1026 }
jbe@99 1027
jbe@99 1028 static int moonbr_io_tcpconnect_nb(lua_State *L) {
jbe@99 1029 return moonbr_io_tcpconnect_impl(L, 1);
jbe@99 1030 }
jbe@99 1031
jbe@112 1032 static int moonbr_io_locallisten(lua_State *L) {
jbe@112 1033 moonbr_io_listener_t *listener;
jbe@112 1034 const char *path;
jbe@118 1035 struct stat sb;
jbe@112 1036 struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };
jbe@112 1037 const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@112 1038 (void *)sockaddr.sun_path - (void *)&sockaddr
jbe@112 1039 ) - 1; /* one byte for termination */
jbe@112 1040 int sock;
jbe@112 1041 path = luaL_checkstring(L, 1);
jbe@112 1042 if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);
jbe@112 1043 strcpy(sockaddr.sun_path, path);
jbe@118 1044 if (stat(path, &sb) == 0) {
jbe@118 1045 if (S_ISSOCK(sb.st_mode)) unlink(path);
jbe@118 1046 }
jbe@112 1047 listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));
jbe@117 1048 listener->fd = -1;
jbe@112 1049 luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@112 1050 sock = socket(
jbe@112 1051 PF_LOCAL,
jbe@112 1052 SOCK_STREAM | SOCK_CLOEXEC,
jbe@112 1053 0
jbe@112 1054 );
jbe@112 1055 if (sock < 0) {
jbe@112 1056 moonbr_io_errmsg();
jbe@112 1057 lua_pushnil(L);
jbe@112 1058 lua_pushstring(L, errmsg);
jbe@112 1059 return 2;
jbe@112 1060 }
jbe@112 1061 if (bind(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
jbe@112 1062 moonbr_io_errmsg();
jbe@112 1063 close(sock);
jbe@112 1064 lua_pushnil(L);
jbe@112 1065 lua_pushstring(L, errmsg);
jbe@112 1066 return 2;
jbe@112 1067 }
jbe@112 1068 if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {
jbe@112 1069 moonbr_io_errmsg();
jbe@112 1070 close(sock);
jbe@112 1071 lua_pushnil(L);
jbe@112 1072 lua_pushstring(L, errmsg);
jbe@112 1073 return 2;
jbe@112 1074 }
jbe@112 1075 listener->fd = sock;
jbe@118 1076 listener->addrfam = AF_LOCAL;
jbe@112 1077 listener->nonblocking = -1;
jbe@112 1078 return 1;
jbe@112 1079 }
jbe@112 1080
jbe@108 1081 static int moonbr_io_tcplisten(lua_State *L) {
jbe@108 1082 moonbr_io_listener_t *listener;
jbe@108 1083 const char *host, *port;
jbe@108 1084 struct addrinfo hints = { 0, };
jbe@108 1085 struct addrinfo *res, *addrinfo;
jbe@108 1086 int errcode;
jbe@108 1087 int sock;
jbe@108 1088 host = luaL_optstring(L, 1, NULL);
jbe@108 1089 port = luaL_checkstring(L, 2);
jbe@108 1090 listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));
jbe@117 1091 listener->fd = -1;
jbe@108 1092 luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1093 hints.ai_family = AF_UNSPEC;
jbe@108 1094 hints.ai_socktype = SOCK_STREAM;
jbe@108 1095 hints.ai_protocol = IPPROTO_TCP;
jbe@108 1096 hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE;
jbe@108 1097 errcode = getaddrinfo(host, port, &hints, &res);
jbe@108 1098 if (errcode) {
jbe@108 1099 freeaddrinfo(res);
jbe@108 1100 if (errcode == EAI_SYSTEM) {
jbe@108 1101 moonbr_io_errmsg();
jbe@108 1102 lua_pushnil(L);
jbe@108 1103 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@108 1104 } else {
jbe@108 1105 lua_pushnil(L);
jbe@108 1106 lua_pushstring(L, gai_strerror(errcode));
jbe@108 1107 }
jbe@108 1108 return 2;
jbe@108 1109 }
jbe@108 1110 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 1111 if (addrinfo->ai_family == AF_INET6) goto moonbr_io_tcpconnect_found;
jbe@108 1112 }
jbe@108 1113 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 1114 if (addrinfo->ai_family == AF_INET) goto moonbr_io_tcpconnect_found;
jbe@108 1115 }
jbe@108 1116 addrinfo = res;
jbe@108 1117 moonbr_io_tcpconnect_found:
jbe@118 1118 listener->addrfam = addrinfo->ai_family;
jbe@108 1119 sock = socket(
jbe@134 1120 addrinfo->ai_family, /* NOTE: not correctly using PF_* but AF_* constants here */
jbe@108 1121 addrinfo->ai_socktype | SOCK_CLOEXEC,
jbe@108 1122 addrinfo->ai_protocol
jbe@108 1123 );
jbe@108 1124 if (sock < 0) {
jbe@108 1125 moonbr_io_errmsg();
jbe@108 1126 freeaddrinfo(res);
jbe@108 1127 lua_pushnil(L);
jbe@108 1128 lua_pushstring(L, errmsg);
jbe@108 1129 return 2;
jbe@108 1130 }
jbe@120 1131 {
jbe@120 1132 static const int reuseval = 1;
jbe@120 1133 if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &reuseval, sizeof(reuseval))) {
jbe@120 1134 moonbr_io_errmsg();
jbe@120 1135 freeaddrinfo(res);
jbe@120 1136 close(sock);
jbe@120 1137 lua_pushnil(L);
jbe@120 1138 lua_pushfstring(L, "Error while setting SO_REUSEADDR with setsockopt: %s", errmsg);
jbe@120 1139 return 2;
jbe@120 1140 }
jbe@120 1141 }
jbe@108 1142 if (bind(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@108 1143 moonbr_io_errmsg();
jbe@108 1144 freeaddrinfo(res);
jbe@108 1145 close(sock);
jbe@108 1146 lua_pushnil(L);
jbe@108 1147 lua_pushstring(L, errmsg);
jbe@108 1148 return 2;
jbe@108 1149 }
jbe@108 1150 freeaddrinfo(res);
jbe@108 1151 if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {
jbe@108 1152 moonbr_io_errmsg();
jbe@108 1153 close(sock);
jbe@108 1154 lua_pushnil(L);
jbe@108 1155 lua_pushstring(L, errmsg);
jbe@108 1156 return 2;
jbe@108 1157 }
jbe@108 1158 listener->fd = sock;
jbe@108 1159 listener->nonblocking = -1;
jbe@108 1160 return 1;
jbe@108 1161 }
jbe@108 1162
jbe@108 1163 static int moonbr_io_accept_impl(lua_State *L, int nonblocking) {
jbe@108 1164 moonbr_io_listener_t *listener;
jbe@108 1165 int fd;
jbe@108 1166 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1167 if (listener->fd < 0) luaL_error(L, "Attempt to use a closed listener");
jbe@108 1168 if (listener->nonblocking != nonblocking) {
jbe@108 1169 int flags;
jbe@108 1170 flags = fcntl(listener->fd, F_GETFL, 0);
jbe@108 1171 if (flags == -1) {
jbe@108 1172 moonbr_io_errmsg();
jbe@108 1173 close(listener->fd);
jbe@108 1174 listener->fd = -1;
jbe@108 1175 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@108 1176 }
jbe@108 1177 if (nonblocking) flags |= O_NONBLOCK;
jbe@108 1178 else flags &= ~O_NONBLOCK;
jbe@108 1179 if (fcntl(listener->fd, F_SETFL, flags) == -1) {
jbe@108 1180 moonbr_io_errmsg();
jbe@108 1181 close(listener->fd);
jbe@108 1182 listener->fd = -1;
jbe@108 1183 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@108 1184 }
jbe@108 1185 listener->nonblocking = nonblocking;
jbe@108 1186 }
jbe@108 1187 while (1) {
jbe@108 1188 fd = accept4(listener->fd, NULL, NULL, SOCK_CLOEXEC);
jbe@108 1189 if (fd < 0) {
jbe@108 1190 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@108 1191 lua_pushboolean(L, 0);
jbe@108 1192 lua_pushliteral(L, "No incoming connection pending");
jbe@108 1193 return 2;
jbe@108 1194 } else if (errno != EINTR) {
jbe@108 1195 moonbr_io_errmsg();
jbe@108 1196 lua_pushnil(L);
jbe@108 1197 lua_pushstring(L, errmsg);
jbe@108 1198 return 2;
jbe@108 1199 }
jbe@108 1200 } else {
jbe@108 1201 moonbr_io_pushhandle(L, fd);
jbe@108 1202 return 1;
jbe@108 1203 }
jbe@108 1204 }
jbe@108 1205 }
jbe@108 1206
jbe@108 1207 static int moonbr_io_accept(lua_State *L) {
jbe@108 1208 return moonbr_io_accept_impl(L, 0);
jbe@108 1209 }
jbe@108 1210
jbe@108 1211 static int moonbr_io_accept_nb(lua_State *L) {
jbe@108 1212 return moonbr_io_accept_impl(L, 1);
jbe@108 1213 }
jbe@108 1214
jbe@108 1215 static int moonbr_io_unlisten(lua_State *L) {
jbe@108 1216 moonbr_io_listener_t *listener;
jbe@118 1217 struct sockaddr_un addr;
jbe@118 1218 socklen_t addrlen;
jbe@118 1219 struct stat sb;
jbe@108 1220 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1221 if (listener->fd < 0) luaL_error(L, "Attempt to close a closed listener");
jbe@118 1222 addrlen = sizeof(addr);
jbe@118 1223 if (getsockname(listener->fd, (struct sockaddr *)&addr, &addrlen)) addrlen = 0;
jbe@108 1224 if (close(listener->fd)) {
jbe@108 1225 moonbr_io_errmsg();
jbe@108 1226 listener->fd = -1;
jbe@118 1227 if (addrlen && addrlen <= sizeof(addr)) {
jbe@118 1228 if (stat(addr.sun_path, &sb) == 0) {
jbe@118 1229 if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);
jbe@118 1230 }
jbe@118 1231 }
jbe@108 1232 lua_pushnil(L);
jbe@108 1233 lua_pushstring(L, errmsg);
jbe@108 1234 return 2;
jbe@108 1235 }
jbe@108 1236 listener->fd = -1;
jbe@118 1237 if (addrlen && addrlen <= sizeof(addr)) {
jbe@118 1238 if (stat(addr.sun_path, &sb) == 0) {
jbe@118 1239 if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);
jbe@118 1240 }
jbe@118 1241 }
jbe@108 1242 lua_pushboolean(L, 1);
jbe@108 1243 return 1;
jbe@108 1244 }
jbe@108 1245
jbe@108 1246 static int moonbr_io_listenergc(lua_State *L) {
jbe@108 1247 moonbr_io_listener_t *listener;
jbe@108 1248 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@117 1249 if (listener->fd >= 0) close(listener->fd);
jbe@108 1250 listener->fd = -1;
jbe@108 1251 return 0;
jbe@108 1252 }
jbe@108 1253
jbe@205 1254 static int moonbr_io_exec(lua_State *L) {
jbe@205 1255 char **argv;
jbe@205 1256 int i, argc;
jbe@205 1257 int sockin[2], sockout[2], sockerr[2];
jbe@205 1258 volatile int errorcond = 0;
jbe@205 1259 volatile char errmsgbuf[MOONBR_IO_MAXSTRERRORLEN];
jbe@205 1260 moonbr_io_child_t *child;
jbe@205 1261 argc = lua_gettop(L);
jbe@205 1262 argv = lua_newuserdata(L, (argc + 1) * sizeof(char *));
jbe@205 1263 for (i=0; i<argc; i++) argv[i] = (char *)luaL_checkstring(L, i+1);
jbe@205 1264 argv[argc] = NULL;
jbe@208 1265 child = lua_newuserdata(L, sizeof(moonbr_io_child_t));
jbe@208 1266 child->pid = 0;
jbe@208 1267 lua_newtable(L);
jbe@208 1268 lua_setuservalue(L, -2);
jbe@208 1269 luaL_getmetatable(L, MOONBR_IO_CHILD_MT_REGKEY);
jbe@208 1270 lua_setmetatable(L, -2);
jbe@206 1271 if (socketpair(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0, sockin)) {
jbe@205 1272 moonbr_io_errmsg();
jbe@205 1273 lua_pushnil(L);
jbe@205 1274 lua_pushfstring(L, "Could not create socket pair: %s", errmsg);
jbe@205 1275 return 2;
jbe@205 1276 }
jbe@206 1277 if (socketpair(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0, sockout)) {
jbe@205 1278 moonbr_io_errmsg();
jbe@205 1279 close(sockin[0]);
jbe@205 1280 close(sockin[1]);
jbe@205 1281 lua_pushnil(L);
jbe@205 1282 lua_pushfstring(L, "Could not create socket pair: %s", errmsg);
jbe@205 1283 return 2;
jbe@205 1284 }
jbe@206 1285 if (socketpair(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0, sockerr)) {
jbe@205 1286 moonbr_io_errmsg();
jbe@205 1287 close(sockin[0]);
jbe@205 1288 close(sockin[1]);
jbe@205 1289 close(sockout[0]);
jbe@205 1290 close(sockout[1]);
jbe@205 1291 lua_pushnil(L);
jbe@205 1292 lua_pushfstring(L, "Could not create socket pair: %s", errmsg);
jbe@205 1293 return 2;
jbe@205 1294 }
jbe@205 1295 child->pid = vfork();
jbe@205 1296 if (child->pid == -1) {
jbe@205 1297 moonbr_io_errmsg();
jbe@205 1298 close(sockin[0]);
jbe@205 1299 close(sockin[1]);
jbe@205 1300 close(sockout[0]);
jbe@205 1301 close(sockout[1]);
jbe@205 1302 close(sockerr[0]);
jbe@205 1303 close(sockerr[1]);
jbe@205 1304 lua_pushnil(L);
jbe@205 1305 lua_pushfstring(L, "Could not fork: %s", errmsg);
jbe@205 1306 return 2;
jbe@205 1307 }
jbe@205 1308 if (!child->pid) {
jbe@208 1309 if (dup2(sockin[1], 0) == -1) goto moonbr_io_exec_error1;
jbe@208 1310 if (dup2(sockout[1], 1) == -1) goto moonbr_io_exec_error1;
jbe@208 1311 if (dup2(sockerr[1], 2) == -1) goto moonbr_io_exec_error1;
jbe@205 1312 closefrom(4);
jbe@208 1313 if (fcntl(0, F_SETFD, 0) == -1) goto moonbr_io_exec_error1;
jbe@208 1314 if (fcntl(1, F_SETFD, 0) == -1) goto moonbr_io_exec_error1;
jbe@208 1315 if (fcntl(2, F_SETFD, 0) == -1) goto moonbr_io_exec_error1;
jbe@205 1316 if (execvp(argv[0], argv)) {
jbe@205 1317 errorcond = 2;
jbe@205 1318 strerror_r(errno, (char *)errmsgbuf, MOONBR_IO_MAXSTRERRORLEN);
jbe@205 1319 _exit(0);
jbe@205 1320 }
jbe@208 1321 moonbr_io_exec_error1:
jbe@206 1322 errorcond = 1;
jbe@206 1323 strerror_r(errno, (char *)errmsgbuf, MOONBR_IO_MAXSTRERRORLEN);
jbe@206 1324 _exit(0);
jbe@205 1325 }
jbe@205 1326 close(sockin[1]);
jbe@205 1327 close(sockout[1]);
jbe@205 1328 close(sockerr[1]);
jbe@205 1329 if (errorcond) {
jbe@205 1330 int status;
jbe@205 1331 close(sockin[0]);
jbe@205 1332 close(sockout[0]);
jbe@205 1333 close(sockerr[0]);
jbe@205 1334 while (waitpid(child->pid, &status, 0) == -1) {
jbe@205 1335 if (errno != EINTR) {
jbe@205 1336 moonbr_io_errmsg();
jbe@205 1337 luaL_error(L, "Error in waitpid call after unsuccessful exec: %s", errmsg);
jbe@205 1338 }
jbe@205 1339 }
jbe@208 1340 child->pid = 0;
jbe@205 1341 lua_pushnil(L);
jbe@205 1342 if (errorcond == 2) lua_pushfstring(L, "Could not execute: %s", errmsgbuf);
jbe@205 1343 else lua_pushfstring(L, "Error in fork: %s", errmsgbuf);
jbe@205 1344 return 2;
jbe@205 1345 }
jbe@208 1346 lua_pushcfunction(L, moonbr_io_pushhandle_impl);
jbe@208 1347 lua_pushlightuserdata(L, &sockin[0]);
jbe@208 1348 if (lua_pcall(L, 1, 1, 0)) {
jbe@208 1349 if (sockin[0] != -1) close(sockin[0]);
jbe@208 1350 close(sockout[0]);
jbe@208 1351 close(sockerr[0]);
jbe@208 1352 goto moonbr_io_exec_error2;
jbe@208 1353 }
jbe@205 1354 lua_setfield(L, -2, "stdin");
jbe@208 1355 lua_pushcfunction(L, moonbr_io_pushhandle_impl);
jbe@208 1356 lua_pushlightuserdata(L, &sockout[0]);
jbe@208 1357 if (lua_pcall(L, 1, 1, 0)) {
jbe@208 1358 if (sockout[0] != -1) close(sockout[0]);
jbe@208 1359 close(sockerr[0]);
jbe@208 1360 goto moonbr_io_exec_error2;
jbe@208 1361 }
jbe@205 1362 lua_setfield(L, -2, "stdout");
jbe@208 1363 lua_pushcfunction(L, moonbr_io_pushhandle_impl);
jbe@208 1364 lua_pushlightuserdata(L, &sockerr[0]);
jbe@208 1365 if (lua_pcall(L, 1, 1, 0)) {
jbe@208 1366 if (sockerr[0] != -1) close(sockerr[0]);
jbe@208 1367 goto moonbr_io_exec_error2;
jbe@208 1368 }
jbe@205 1369 lua_setfield(L, -2, "stderr");
jbe@205 1370 return 1;
jbe@208 1371 moonbr_io_exec_error2:
jbe@208 1372 {
jbe@208 1373 int status;
jbe@208 1374 while (waitpid(child->pid, &status, 0) == -1) {
jbe@208 1375 if (errno != EINTR) {
jbe@208 1376 moonbr_io_errmsg();
jbe@208 1377 luaL_error(L, "Error in waitpid call after error creating socket handles: %s", errmsg);
jbe@208 1378 }
jbe@208 1379 }
jbe@208 1380 }
jbe@208 1381 child->pid = 0;
jbe@208 1382 return lua_error(L);
jbe@205 1383 }
jbe@205 1384
jbe@205 1385 static int moonbr_io_childindex(lua_State *L) {
jbe@205 1386 luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205 1387 luaL_checkany(L, 2);
jbe@205 1388 lua_getuservalue(L, 1);
jbe@205 1389 lua_pushvalue(L, 2);
jbe@205 1390 lua_gettable(L, -2);
jbe@205 1391 if (lua_isnil(L, -1)) {
jbe@205 1392 luaL_getmetatable(L, MOONBR_IO_CHILD_PT_REGKEY);
jbe@205 1393 lua_pushvalue(L, 2);
jbe@205 1394 lua_gettable(L, -2);
jbe@205 1395 }
jbe@205 1396 return 1;
jbe@205 1397 }
jbe@205 1398
jbe@205 1399 static int moonbr_io_childnewindex(lua_State *L) {
jbe@205 1400 luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205 1401 luaL_checkany(L, 2);
jbe@205 1402 luaL_checkany(L, 3);
jbe@205 1403 lua_getuservalue(L, 1);
jbe@205 1404 lua_pushvalue(L, 2);
jbe@205 1405 lua_pushvalue(L, 3);
jbe@205 1406 lua_settable(L, -3);
jbe@205 1407 return 0;
jbe@205 1408 }
jbe@205 1409
jbe@205 1410 static int moonbr_io_childgc(lua_State *L) {
jbe@205 1411 moonbr_io_child_t *child;
jbe@205 1412 child = luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205 1413 if (child->pid) {
jbe@205 1414 int status;
jbe@205 1415 if (kill(child->pid, SIGKILL)) {
jbe@205 1416 moonbr_io_errmsg();
jbe@205 1417 luaL_error(L, "Error in kill call during garbage collection: %s", errmsg);
jbe@205 1418 }
jbe@205 1419 while (waitpid(child->pid, &status, 0) == -1) {
jbe@205 1420 if (errno != EINTR) {
jbe@205 1421 moonbr_io_errmsg();
jbe@205 1422 luaL_error(L, "Error in waitpid call during garbage collection: %s", errmsg);
jbe@205 1423 }
jbe@205 1424 }
jbe@205 1425 }
jbe@205 1426 return 0;
jbe@205 1427 }
jbe@205 1428
jbe@205 1429 static int moonbr_io_kill(lua_State *L) {
jbe@205 1430 moonbr_io_child_t *child;
jbe@205 1431 int sig;
jbe@205 1432 child = luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205 1433 sig = luaL_optinteger(L, 2, SIGTERM);
jbe@205 1434 if (!child->pid) luaL_error(L, "Attempt to kill an already collected child process");
jbe@205 1435 if (kill(child->pid, sig)) {
jbe@205 1436 moonbr_io_errmsg();
jbe@205 1437 luaL_error(L, "Error in kill call: %s", errmsg);
jbe@205 1438 }
jbe@205 1439 lua_settop(L, 1);
jbe@205 1440 return 1;
jbe@205 1441 }
jbe@205 1442
jbe@205 1443 static int moonbr_io_wait_impl(lua_State *L, int nonblocking) {
jbe@205 1444 moonbr_io_child_t *child;
jbe@205 1445 pid_t waitedpid;
jbe@205 1446 int status;
jbe@205 1447 child = luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205 1448 if (!child->pid) luaL_error(L, "Attempt to wait for an already collected child process");
jbe@205 1449 while ((waitedpid = waitpid(child->pid, &status, nonblocking ? WNOHANG : 0)) == -1) {
jbe@205 1450 if (errno != EINTR) {
jbe@205 1451 moonbr_io_errmsg();
jbe@205 1452 luaL_error(L, "Error in waitpid call: %s", errmsg);
jbe@205 1453 }
jbe@205 1454 }
jbe@205 1455 if (!waitedpid) {
jbe@205 1456 lua_pushnil(L);
jbe@205 1457 } else {
jbe@205 1458 child->pid = 0;
jbe@205 1459 if (WIFEXITED(status)) {
jbe@205 1460 lua_pushinteger(L, WEXITSTATUS(status));
jbe@205 1461 } else if (WIFSIGNALED(status)) {
jbe@205 1462 lua_pushinteger(L, -WTERMSIG(status));
jbe@205 1463 } else {
jbe@205 1464 luaL_error(L, "Unexpected status value returned by waitpid call");
jbe@205 1465 }
jbe@205 1466 }
jbe@205 1467 return 1;
jbe@205 1468 }
jbe@205 1469
jbe@205 1470 static int moonbr_io_wait(lua_State *L) {
jbe@205 1471 return moonbr_io_wait_impl(L, 0);
jbe@205 1472 }
jbe@205 1473
jbe@205 1474 static int moonbr_io_wait_nb(lua_State *L) {
jbe@205 1475 return moonbr_io_wait_impl(L, 1);
jbe@205 1476 }
jbe@205 1477
jbe@205 1478 #if LUA_VERSION_NUM >= 503
jbe@205 1479 static int moonbr_io_wait_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@205 1480 #else
jbe@205 1481 static int moonbr_io_wait_cont(lua_State *L) {
jbe@205 1482 #endif
jbe@205 1483 #if !(LUA_VERSION_NUM >= 503)
jbe@205 1484 int ctx = 0;
jbe@205 1485 lua_getctx(L, &ctx);
jbe@205 1486 #endif
jbe@205 1487 while (1) {
jbe@205 1488 lua_pushcfunction(L, moonbr_io_wait_nb);
jbe@205 1489 lua_pushvalue(L, 1);
jbe@205 1490 lua_call(L, 1, 1);
jbe@205 1491 if (!lua_isnil(L, -1)) break;
jbe@205 1492 lua_pushvalue(L, 2);
jbe@205 1493 lua_callk(L, 0, 0, ctx, moonbr_io_wait_cont);
jbe@205 1494 }
jbe@205 1495 return 1;
jbe@205 1496 }
jbe@205 1497
jbe@205 1498 static int moonbr_io_wait_call(lua_State *L) {
jbe@205 1499 lua_settop(L, 2);
jbe@205 1500 #if LUA_VERSION_NUM >= 503
jbe@205 1501 return moonbr_io_wait_cont(L, 0, 0);
jbe@205 1502 #else
jbe@205 1503 return moonbr_io_wait_cont(L);
jbe@205 1504 #endif
jbe@205 1505 }
jbe@205 1506
jbe@205 1507 moonbr_io_yield_wrapper(moonbr_io_wait_yield, moonbr_io_wait_call);
jbe@205 1508
jbe@106 1509 static int moonbr_io_poll(lua_State *L) {
jbe@106 1510 moonbr_io_handle_t *handle;
jbe@108 1511 moonbr_io_listener_t *listener;
jbe@106 1512 int fd, isnum;
jbe@106 1513 int nfds = 0;
jbe@106 1514 fd_set readfds, writefds, exceptfds;
jbe@106 1515 struct timeval timeout = {0, };
jbe@106 1516 int status;
jbe@106 1517 FD_ZERO(&readfds);
jbe@106 1518 FD_ZERO(&writefds);
jbe@106 1519 FD_ZERO(&exceptfds);
jbe@106 1520 if (!lua_isnoneornil(L, 1)) {
jbe@106 1521 luaL_checktype(L, 1, LUA_TTABLE);
jbe@106 1522 for (lua_pushnil(L); lua_next(L, 1); lua_pop(L, 1)) {
jbe@106 1523 if (lua_toboolean(L, -1)) {
jbe@106 1524 handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@106 1525 if (handle) {
jbe@109 1526 if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");
jbe@106 1527 fd = handle->fd;
jbe@122 1528 if (
jbe@122 1529 fd < 0 || /* fake EOF to simulate shutdown if fd < 0 */
jbe@122 1530 handle->readbufin != handle->readbufout /* data pending in buffer */
jbe@122 1531 ) {
jbe@109 1532 lua_pushboolean(L, 1);
jbe@109 1533 return 1;
jbe@109 1534 }
jbe@106 1535 } else {
jbe@108 1536 listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1537 if (listener) {
jbe@108 1538 fd = listener->fd;
jbe@108 1539 if (fd < 0) luaL_error(L, "Attempt to poll a closed listener");
jbe@108 1540 } else {
jbe@108 1541 fd = lua_tointegerx(L, -2, &isnum);
jbe@108 1542 if (!isnum) luaL_error(L, "Expected integer (file descriptor), I/O handle, or listener in table key");
jbe@108 1543 }
jbe@106 1544 }
jbe@138 1545 if (fd < 0 || fd >= FD_SETSIZE) luaL_error(L, "File descriptor out of valid range");
jbe@106 1546 FD_SET(fd, &readfds);
jbe@106 1547 if (fd+1 > nfds) nfds = fd+1;
jbe@106 1548 }
jbe@106 1549 }
jbe@106 1550 }
jbe@106 1551 if (!lua_isnoneornil(L, 2)) {
jbe@106 1552 luaL_checktype(L, 2, LUA_TTABLE);
jbe@106 1553 for (lua_pushnil(L); lua_next(L, 2); lua_pop(L, 1)) {
jbe@106 1554 if (lua_toboolean(L, -1)) {
jbe@106 1555 handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@106 1556 if (handle) {
jbe@109 1557 if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");
jbe@109 1558 if (handle->finished) luaL_error(L, "Attempt to write-poll a finished connection");
jbe@106 1559 fd = handle->fd;
jbe@106 1560 } else {
jbe@108 1561 listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@109 1562 if (listener) luaL_error(L, "Attempt to write-poll a listener");
jbe@109 1563 fd = lua_tointegerx(L, -2, &isnum);
jbe@109 1564 if (!isnum) luaL_error(L, "Expected integer (file descriptor) or I/O handle in table key");
jbe@106 1565 }
jbe@138 1566 if (fd < 0 || fd >= FD_SETSIZE) luaL_error(L, "File descriptor out of valid range");
jbe@106 1567 FD_SET(fd, &writefds);
jbe@106 1568 if (fd+1 > nfds) nfds = fd+1;
jbe@106 1569 }
jbe@106 1570 }
jbe@106 1571 }
jbe@106 1572 if (!lua_isnoneornil(L, 3)) {
jbe@106 1573 lua_Number n;
jbe@106 1574 n = lua_tonumberx(L, 3, &isnum);
jbe@146 1575 if (isnum && n<0) {
jbe@146 1576 lua_pushboolean(L, 0);
jbe@146 1577 lua_pushliteral(L, "Negative timeout");
jbe@146 1578 return 2;
jbe@146 1579 } else if (isnum && n>=0 && n<100000000) {
jbe@106 1580 timeout.tv_sec = n;
jbe@106 1581 timeout.tv_usec = 1e6 * (n - timeout.tv_sec);
jbe@106 1582 } else {
jbe@106 1583 luaL_argcheck(L, 0, 3, "not a valid timeout");
jbe@106 1584 }
jbe@106 1585 status = select(nfds, &readfds, &writefds, &exceptfds, &timeout);
jbe@106 1586 } else {
jbe@106 1587 status = select(nfds, &readfds, &writefds, &exceptfds, NULL);
jbe@106 1588 }
jbe@106 1589 if (status == -1) {
jbe@106 1590 if (errno == EINTR) {
jbe@146 1591 lua_pushnil(L);
jbe@106 1592 lua_pushliteral(L, "Signal received while polling file descriptors");
jbe@106 1593 return 2;
jbe@106 1594 } else {
jbe@106 1595 moonbr_io_errmsg();
jbe@106 1596 return luaL_error(L, "Unexpected error during \"select\" system call: %s", errmsg);
jbe@106 1597 }
jbe@106 1598 } else if (status == 0) {
jbe@106 1599 lua_pushboolean(L, 0);
jbe@106 1600 lua_pushliteral(L, "Timeout while polling file descriptors");
jbe@106 1601 return 2;
jbe@106 1602 } else {
jbe@106 1603 lua_pushboolean(L, 1);
jbe@106 1604 return 1;
jbe@106 1605 }
jbe@106 1606 }
jbe@106 1607
jbe@115 1608 static int moonbr_io_timeref(lua_State *L) {
jbe@115 1609 lua_Number sub;
jbe@115 1610 struct timespec tp;
jbe@115 1611 sub = luaL_optnumber(L, 1, 0);
jbe@115 1612 if (clock_gettime(CLOCK_MONOTONIC, &tp)) {
jbe@115 1613 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
jbe@115 1614 }
jbe@115 1615 lua_pushnumber(L, tp.tv_sec + tp.tv_nsec / 1.0e9 - sub);
jbe@115 1616 return 1;
jbe@115 1617 }
jbe@115 1618
jbe@79 1619 static const struct luaL_Reg moonbr_io_handle_methods[] = {
jbe@85 1620 {"read", moonbr_io_read},
jbe@85 1621 {"read_nb", moonbr_io_read_nb},
jbe@140 1622 {"read_call", moonbr_io_read_call},
jbe@140 1623 {"read_yield", moonbr_io_read_yield},
jbe@86 1624 {"drain", moonbr_io_drain},
jbe@86 1625 {"drain_nb", moonbr_io_drain_nb},
jbe@144 1626 {"drain_call", moonbr_io_drain_call},
jbe@144 1627 {"drain_yield", moonbr_io_drain_yield},
jbe@80 1628 {"write", moonbr_io_write},
jbe@81 1629 {"write_nb", moonbr_io_write_nb},
jbe@145 1630 {"write_call", moonbr_io_write_call},
jbe@145 1631 {"write_yield", moonbr_io_write_yield},
jbe@80 1632 {"flush", moonbr_io_flush},
jbe@81 1633 {"flush_nb", moonbr_io_flush_nb},
jbe@145 1634 {"flush_call", moonbr_io_flush_call},
jbe@145 1635 {"flush_yield", moonbr_io_flush_yield},
jbe@88 1636 {"finish", moonbr_io_finish},
jbe@87 1637 {"close", moonbr_io_close},
jbe@85 1638 {"reset", moonbr_io_reset},
jbe@79 1639 {NULL, NULL}
jbe@79 1640 };
jbe@79 1641
jbe@79 1642 static const struct luaL_Reg moonbr_io_handle_metamethods[] = {
jbe@79 1643 {"__index", moonbr_io_handleindex},
jbe@79 1644 {"__newindex", moonbr_io_handlenewindex},
jbe@108 1645 {"__gc", moonbr_io_handlegc},
jbe@108 1646 {NULL, NULL}
jbe@108 1647 };
jbe@108 1648
jbe@108 1649 static const struct luaL_Reg moonbr_io_listener_methods[] = {
jbe@108 1650 {"accept", moonbr_io_accept},
jbe@108 1651 {"accept_nb", moonbr_io_accept_nb},
jbe@108 1652 {"close", moonbr_io_unlisten},
jbe@108 1653 {NULL, NULL}
jbe@108 1654 };
jbe@108 1655
jbe@108 1656 static const struct luaL_Reg moonbr_io_listener_metamethods[] = {
jbe@108 1657 {"__gc", moonbr_io_listenergc},
jbe@79 1658 {NULL, NULL}
jbe@79 1659 };
jbe@79 1660
jbe@205 1661 static const struct luaL_Reg moonbr_io_child_methods[] = {
jbe@205 1662 {"kill", moonbr_io_kill},
jbe@205 1663 {"wait", moonbr_io_wait},
jbe@205 1664 {"wait_nb", moonbr_io_wait_nb},
jbe@205 1665 {"wait_call", moonbr_io_wait_call},
jbe@205 1666 {"wait_yield", moonbr_io_wait_yield},
jbe@205 1667 {NULL, NULL}
jbe@205 1668 };
jbe@205 1669
jbe@205 1670 static const struct luaL_Reg moonbr_io_child_metamethods[] = {
jbe@205 1671 {"__index", moonbr_io_childindex},
jbe@205 1672 {"__newindex", moonbr_io_childnewindex},
jbe@205 1673 {"__gc", moonbr_io_childgc},
jbe@205 1674 {NULL, NULL}
jbe@205 1675 };
jbe@205 1676
jbe@79 1677 static const struct luaL_Reg moonbr_io_module_funcs[] = {
jbe@111 1678 {"localconnect", moonbr_io_localconnect},
jbe@111 1679 {"localconnect_nb", moonbr_io_localconnect_nb},
jbe@98 1680 {"tcpconnect", moonbr_io_tcpconnect},
jbe@99 1681 {"tcpconnect_nb", moonbr_io_tcpconnect_nb},
jbe@112 1682 {"locallisten", moonbr_io_locallisten},
jbe@108 1683 {"tcplisten", moonbr_io_tcplisten},
jbe@205 1684 {"exec", moonbr_io_exec},
jbe@106 1685 {"poll", moonbr_io_poll},
jbe@115 1686 {"timeref", moonbr_io_timeref},
jbe@79 1687 {NULL, NULL}
jbe@79 1688 };
jbe@79 1689
jbe@79 1690 int luaopen_moonbridge_io(lua_State *L) {
jbe@79 1691
jbe@113 1692 signal(SIGPIPE, SIG_IGN); /* generate I/O errors instead of signal 13 */
jbe@113 1693
jbe@80 1694 lua_newtable(L); // module
jbe@80 1695
jbe@79 1696 lua_newtable(L); // public metatable
jbe@79 1697 lua_newtable(L); // handle methods
jbe@79 1698 luaL_setfuncs(L, moonbr_io_handle_methods, 0);
jbe@80 1699 lua_pushvalue(L, -1);
jbe@146 1700 lua_setfield(L, -4, "handle_pt");
jbe@79 1701 lua_setfield(L, -2, "__index");
jbe@79 1702 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 1703
jbe@79 1704 lua_newtable(L); // handle metatable
jbe@79 1705 luaL_setfuncs(L, moonbr_io_handle_metamethods, 0);
jbe@146 1706 lua_pushvalue(L, -1);
jbe@146 1707 lua_setfield(L, -3, "handle_mt");
jbe@79 1708 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 1709
jbe@108 1710 lua_newtable(L); // listener metatable
jbe@108 1711 luaL_setfuncs(L, moonbr_io_listener_metamethods, 0);
jbe@108 1712 lua_newtable(L); // listener methods
jbe@108 1713 luaL_setfuncs(L, moonbr_io_listener_methods, 0);
jbe@108 1714 lua_pushvalue(L, -1);
jbe@146 1715 lua_setfield(L, -4, "listener_pt");
jbe@108 1716 lua_setfield(L, -2, "__index");
jbe@146 1717 lua_pushvalue(L, -1);
jbe@146 1718 lua_setfield(L, -3, "listener_mt");
jbe@108 1719 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1720
jbe@205 1721 lua_newtable(L); // child methods
jbe@205 1722 luaL_setfuncs(L, moonbr_io_child_methods, 0);
jbe@205 1723 lua_pushvalue(L, -1);
jbe@205 1724 lua_setfield(L, -3, "child_pt");
jbe@205 1725 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_CHILD_PT_REGKEY);
jbe@205 1726 lua_newtable(L); // child metatable
jbe@205 1727 luaL_setfuncs(L, moonbr_io_child_metamethods, 0);
jbe@205 1728 lua_pushvalue(L, -1);
jbe@205 1729 lua_setfield(L, -3, "child_mt");
jbe@205 1730 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205 1731
jbe@205 1732 moonbr_io_pushhandle(L, 0);
jbe@205 1733 lua_setfield(L, -2, "stdin");
jbe@205 1734 moonbr_io_pushhandle(L, 1);
jbe@205 1735 lua_setfield(L, -2, "stdout");
jbe@205 1736 moonbr_io_pushhandle(L, 2);
jbe@205 1737 lua_setfield(L, -2, "stderr");
jbe@205 1738
jbe@79 1739 luaL_setfuncs(L, moonbr_io_module_funcs, 0);
jbe@79 1740 return 1;
jbe@79 1741
jbe@79 1742 }
jbe@79 1743

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