moonbridge

annotate moonbridge_io.c @ 212:453b7d1a7944

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Avoid use of accept4() function in favor of accept() to avoid using _GNU_SOURCE on GNU/Linux
author jbe
date Mon Jun 22 22:19:41 2015 +0200 (2015-06-22)
parents a3d569d3e85d
children 43a077f2ab49
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@79 6 #include <stdlib.h>
jbe@135 7 #include <stdint.h>
jbe@135 8 #include <string.h>
jbe@135 9 #include <errno.h>
jbe@79 10 #include <unistd.h>
jbe@135 11 #include <signal.h>
jbe@135 12 #include <fcntl.h>
jbe@135 13 #include <sys/stat.h>
jbe@79 14 #include <sys/socket.h>
jbe@111 15 #include <sys/un.h>
jbe@95 16 #include <netinet/in.h>
jbe@95 17 #include <netinet/tcp.h>
jbe@135 18 #include <sys/select.h>
jbe@136 19 #include <time.h>
jbe@135 20 #include <netdb.h>
jbe@107 21 #include <arpa/inet.h>
jbe@205 22 #include <sys/types.h>
jbe@205 23 #include <sys/wait.h>
jbe@209 24 #if defined(__linux__) || __has_include(<bsd/unistd.h>)
jbe@209 25 #include <bsd/unistd.h>
jbe@209 26 #endif
jbe@211 27
jbe@79 28 #include <lua.h>
jbe@79 29 #include <lauxlib.h>
jbe@79 30 #include <lualib.h>
jbe@79 31
jbe@149 32 #include <assert.h>
jbe@149 33
jbe@80 34 #define MOONBR_IO_MAXSTRERRORLEN 80
jbe@85 35 #define MOONBR_IO_READBUFLEN 4096
jbe@80 36 #define MOONBR_IO_WRITEBUFLEN 4096
jbe@80 37
jbe@108 38 #define MOONBR_IO_LISTEN_BACKLOG 1024
jbe@108 39
jbe@80 40 #define moonbr_io_errmsg() \
jbe@80 41 char errmsg[MOONBR_IO_MAXSTRERRORLEN]; \
jbe@80 42 strerror_r(errno, errmsg, MOONBR_IO_MAXSTRERRORLEN)
jbe@80 43
jbe@79 44 #define MOONBR_IO_HANDLE_MT_REGKEY "moonbridge_io_handle"
jbe@79 45 #define MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY "moonbridge_io_handle_public"
jbe@108 46 #define MOONBR_IO_LISTENER_MT_REGKEY "moonbridge_io_listener"
jbe@205 47 #define MOONBR_IO_CHILD_MT_REGKEY "moonbridge_io_child"
jbe@205 48 #define MOONBR_IO_CHILD_PT_REGKEY "moonbridge_io_child_pt"
jbe@79 49
jbe@79 50 typedef struct {
jbe@79 51 int fd;
jbe@107 52 int issock;
jbe@107 53 sa_family_t addrfam;
jbe@94 54 int finished;
jbe@94 55 int closed;
jbe@81 56 int nonblocking;
jbe@95 57 int nopush;
jbe@85 58 int readerr;
jbe@105 59 int readbufin;
jbe@105 60 int readbufout;
jbe@81 61 int writeerr;
jbe@83 62 size_t writeleft;
jbe@132 63 size_t flushedleft;
jbe@83 64 #if LUA_VERSION_NUM >= 503
jbe@83 65 lua_Integer writeqin;
jbe@83 66 lua_Integer writeqout;
jbe@83 67 #else
jbe@83 68 int writeqin;
jbe@83 69 int writeqout;
jbe@83 70 #endif
jbe@83 71 size_t writeqoff;
jbe@103 72 int writebufin;
jbe@103 73 int writebufout;
jbe@85 74 char readbuf[MOONBR_IO_READBUFLEN];
jbe@80 75 char writebuf[MOONBR_IO_WRITEBUFLEN];
jbe@79 76 } moonbr_io_handle_t;
jbe@79 77
jbe@108 78 typedef struct {
jbe@108 79 int fd;
jbe@118 80 sa_family_t addrfam;
jbe@108 81 int nonblocking;
jbe@108 82 } moonbr_io_listener_t;
jbe@108 83
jbe@205 84 typedef struct {
jbe@205 85 pid_t pid;
jbe@205 86 } moonbr_io_child_t;
jbe@205 87
jbe@148 88 static int moonbr_io_yield(lua_State *L) {
jbe@149 89 return lua_yield(L, lua_gettop(L));
jbe@140 90 }
jbe@140 91
jbe@140 92 #if LUA_VERSION_NUM >= 503
jbe@140 93 static int moonbr_io_cont_returnall(lua_State *L, int status, lua_KContext ctx) {
jbe@140 94 #else
jbe@140 95 static int moonbr_io_cont_returnall(lua_State *L) {
jbe@140 96 #endif
jbe@140 97 return lua_gettop(L);
jbe@140 98 }
jbe@140 99
jbe@145 100 #define moonbr_io_yield_wrapper(yieldfunc, callfunc) \
jbe@145 101 static int yieldfunc(lua_State *L) { \
jbe@145 102 int args; \
jbe@145 103 lua_pushcfunction(L, callfunc); \
jbe@145 104 lua_insert(L, 1); \
jbe@145 105 args = lua_gettop(L); \
jbe@148 106 lua_pushcfunction(L, moonbr_io_yield); \
jbe@145 107 lua_insert(L, 3); \
jbe@145 108 lua_callk(L, args, LUA_MULTRET, 0, moonbr_io_cont_returnall); \
jbe@145 109 return lua_gettop(L); \
jbe@145 110 }
jbe@145 111
jbe@81 112 static void moonbr_io_handle_set_nonblocking(lua_State *L, moonbr_io_handle_t *handle, int nonblocking) {
jbe@95 113 int flags;
jbe@95 114 if (handle->nonblocking == nonblocking) return;
jbe@95 115 flags = fcntl(handle->fd, F_GETFL, 0);
jbe@95 116 if (flags == -1) {
jbe@95 117 moonbr_io_errmsg();
jbe@96 118 close(handle->fd);
jbe@96 119 handle->fd = -1;
jbe@96 120 handle->closed = 1;
jbe@95 121 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@81 122 }
jbe@95 123 if (nonblocking) flags |= O_NONBLOCK;
jbe@95 124 else flags &= ~O_NONBLOCK;
jbe@95 125 if (fcntl(handle->fd, F_SETFL, flags) == -1) {
jbe@95 126 moonbr_io_errmsg();
jbe@96 127 close(handle->fd);
jbe@96 128 handle->fd = -1;
jbe@96 129 handle->closed = 1;
jbe@95 130 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@95 131 }
jbe@95 132 handle->nonblocking = nonblocking;
jbe@81 133 }
jbe@81 134
jbe@87 135 static void moonbr_io_handle_set_linger(lua_State *L, moonbr_io_handle_t *handle, int timeout) {
jbe@87 136 struct linger lingerval = { 0, };
jbe@107 137 if (!handle->issock) return;
jbe@87 138 if (timeout >= 0) {
jbe@87 139 lingerval.l_onoff = 1;
jbe@87 140 lingerval.l_linger = timeout;
jbe@87 141 }
jbe@87 142 if (setsockopt(handle->fd, SOL_SOCKET, SO_LINGER, &lingerval, sizeof(lingerval))) {
jbe@87 143 moonbr_io_errmsg();
jbe@96 144 close(handle->fd);
jbe@96 145 handle->fd = -1;
jbe@96 146 handle->closed = 1;
jbe@95 147 luaL_error(L, "Unexpected error while setting SO_LINGER with setsockopt: %s", errmsg);
jbe@87 148 }
jbe@87 149 }
jbe@87 150
jbe@133 151 static inline void moonbr_io_handle_set_nopush(lua_State *L, moonbr_io_handle_t *handle, int nopush) {
jbe@96 152 #if defined(TCP_NOPUSH) || defined(TCP_CORK)
jbe@107 153 if (
jbe@107 154 !(handle->addrfam == AF_INET6 || handle->addrfam == AF_INET) ||
jbe@107 155 handle->nopush == nopush
jbe@107 156 ) return;
jbe@96 157 #if defined(TCP_NOPUSH)
jbe@96 158 if (setsockopt(handle->fd, IPPROTO_TCP, TCP_NOPUSH, &nopush, sizeof(nopush))) {
jbe@104 159 #elif defined(TCP_CORK)
jbe@104 160 if (setsockopt(handle->fd, IPPROTO_TCP, TCP_CORK, &nopush, sizeof(nopush))) {
jbe@104 161 #endif
jbe@96 162 moonbr_io_errmsg();
jbe@96 163 close(handle->fd);
jbe@96 164 handle->fd = -1;
jbe@96 165 handle->closed = 1;
jbe@104 166 #if defined(TCP_NOPUSH)
jbe@96 167 luaL_error(L, "Unexpected error while setting TCP_NOPUSH with setsockopt: %s", errmsg);
jbe@96 168 #elif defined(TCP_CORK)
jbe@95 169 luaL_error(L, "Unexpected error while setting TCP_CORK with setsockopt: %s", errmsg);
jbe@104 170 #endif
jbe@95 171 }
jbe@95 172 handle->nopush = nopush;
jbe@96 173 #else
jbe@96 174 #warning Neither TCP_NOPUSH nor TCP_CORK is available
jbe@96 175 #endif
jbe@95 176 }
jbe@95 177
jbe@86 178 static int moonbr_io_read_impl(lua_State *L, int nonblocking, int drain) {
jbe@85 179 moonbr_io_handle_t *handle;
jbe@85 180 lua_Integer maxread;
jbe@85 181 const char *terminatorstr;
jbe@210 182 size_t terminatorlen;
jbe@210 183 char terminator = 0; /* initialize to avoid compiler warning */
jbe@85 184 luaL_Buffer luabuf;
jbe@85 185 size_t luabufcnt = 0;
jbe@105 186 int remaining;
jbe@85 187 char *terminatorpos;
jbe@103 188 ssize_t bytesread;
jbe@85 189 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@153 190 maxread = luaL_optinteger(L, 2, -1);
jbe@85 191 terminatorstr = luaL_optlstring(L, 3, "", &terminatorlen);
jbe@85 192 if (terminatorlen) {
jbe@85 193 luaL_argcheck(L, terminatorlen == 1, 3, "single byte expected");
jbe@85 194 terminator = terminatorstr[0];
jbe@85 195 }
jbe@86 196 lua_settop(L, 1); /* return handle on drain, terminator string may be garbage collected */
jbe@94 197 if (handle->closed) luaL_error(L, "Attempt to read from a closed I/O handle");
jbe@85 198 if (handle->readerr) {
jbe@85 199 lua_pushnil(L);
jbe@85 200 lua_pushliteral(L, "Previous read error");
jbe@85 201 return 2;
jbe@85 202 }
jbe@143 203 if (handle->fd < 0) {
jbe@143 204 /* fake EOF to simulate shutdown */
jbe@143 205 if (!drain) lua_pushliteral(L, "");
jbe@143 206 else lua_pushinteger(L, 0);
jbe@143 207 lua_pushliteral(L, "eof");
jbe@143 208 return 2;
jbe@143 209 }
jbe@105 210 handle->readerr = 1;
jbe@85 211 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@86 212 if (!drain) luaL_buffinit(L, &luabuf);
jbe@85 213 while (1) {
jbe@105 214 remaining = -1;
jbe@142 215 terminatorpos = NULL;
jbe@105 216 if (
jbe@153 217 maxread >= 0 &&
jbe@143 218 handle->readbufin - handle->readbufout >= (size_t)maxread - luabufcnt
jbe@105 219 ) {
jbe@142 220 remaining = (size_t)maxread - luabufcnt;
jbe@193 221 if (terminatorlen) {
jbe@193 222 terminatorpos = memchr(
jbe@193 223 handle->readbuf + handle->readbufout,
jbe@193 224 terminator,
jbe@193 225 remaining
jbe@193 226 );
jbe@193 227 }
jbe@85 228 } else if (terminatorlen) {
jbe@105 229 terminatorpos = memchr(
jbe@105 230 handle->readbuf + handle->readbufout,
jbe@105 231 terminator,
jbe@105 232 handle->readbufin - handle->readbufout
jbe@105 233 );
jbe@85 234 }
jbe@142 235 if (terminatorpos) remaining = 1 + (
jbe@142 236 terminatorpos - (handle->readbuf + handle->readbufout)
jbe@142 237 );
jbe@105 238 if (remaining >= 0) {
jbe@86 239 if (!drain) {
jbe@105 240 luaL_addlstring(
jbe@105 241 &luabuf,
jbe@105 242 handle->readbuf + handle->readbufout,
jbe@105 243 remaining
jbe@105 244 );
jbe@86 245 luaL_pushresult(&luabuf);
jbe@90 246 } else {
jbe@105 247 lua_pushinteger(L, luabufcnt + remaining);
jbe@86 248 }
jbe@143 249 if (terminatorpos) lua_pushliteral(L, "term");
jbe@143 250 else lua_pushliteral(L, "maxlen");
jbe@105 251 handle->readbufout += remaining;
jbe@105 252 if (handle->readbufout == handle->readbufin) {
jbe@105 253 handle->readbufin = 0;
jbe@143 254 handle->readbufout = 0;
jbe@105 255 }
jbe@104 256 handle->readerr = 0;
jbe@143 257 return 2;
jbe@85 258 }
jbe@105 259 if (!drain) luaL_addlstring(
jbe@105 260 &luabuf,
jbe@105 261 handle->readbuf + handle->readbufout,
jbe@105 262 handle->readbufin - handle->readbufout
jbe@105 263 );
jbe@105 264 luabufcnt += handle->readbufin - handle->readbufout;
jbe@143 265 handle->readbufout = 0;
jbe@85 266 do {
jbe@103 267 bytesread = read(handle->fd, handle->readbuf, MOONBR_IO_READBUFLEN);
jbe@103 268 } while (bytesread < 0 && (errno == EINTR));
jbe@105 269 if (
jbe@105 270 bytesread == 0 || (
jbe@105 271 nonblocking &&
jbe@105 272 bytesread < 0 && (errno == EAGAIN || errno == EWOULDBLOCK)
jbe@105 273 )
jbe@105 274 ) {
jbe@105 275 handle->readbufin = 0;
jbe@143 276 if (!drain) luaL_pushresult(&luabuf);
jbe@143 277 else lua_pushinteger(L, luabufcnt);
jbe@143 278 if (bytesread == 0) lua_pushliteral(L, "eof");
jbe@143 279 else lua_pushliteral(L, "block");
jbe@105 280 handle->readerr = 0;
jbe@143 281 return 2;
jbe@105 282 }
jbe@103 283 if (bytesread < 0) {
jbe@85 284 moonbr_io_errmsg();
jbe@85 285 lua_pushnil(L);
jbe@85 286 lua_pushstring(L, errmsg);
jbe@85 287 return 2;
jbe@85 288 }
jbe@105 289 handle->readbufin = bytesread;
jbe@86 290 }
jbe@85 291 }
jbe@85 292
jbe@85 293 static int moonbr_io_read(lua_State *L) {
jbe@86 294 return moonbr_io_read_impl(L, 0, 0);
jbe@85 295 }
jbe@85 296
jbe@85 297 static int moonbr_io_read_nb(lua_State *L) {
jbe@86 298 return moonbr_io_read_impl(L, 1, 0);
jbe@86 299 }
jbe@86 300
jbe@86 301 static int moonbr_io_drain(lua_State *L) {
jbe@86 302 return moonbr_io_read_impl(L, 0, 1);
jbe@86 303 }
jbe@86 304
jbe@86 305 static int moonbr_io_drain_nb(lua_State *L) {
jbe@86 306 return moonbr_io_read_impl(L, 1, 1);
jbe@85 307 }
jbe@85 308
jbe@140 309 #if LUA_VERSION_NUM >= 503
jbe@140 310 static int moonbr_io_read_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@140 311 #else
jbe@140 312 static int moonbr_io_read_cont(lua_State *L) {
jbe@140 313 #endif
jbe@143 314 lua_Integer remaining;
jbe@143 315 size_t len;
jbe@140 316 #if !(LUA_VERSION_NUM >= 503)
jbe@140 317 int ctx = 0;
jbe@140 318 lua_getctx(L, &ctx);
jbe@140 319 #endif
jbe@140 320 remaining = lua_tointeger(L, 3);
jbe@140 321 while (1) {
jbe@140 322 lua_pushcfunction(L, moonbr_io_read_nb);
jbe@140 323 lua_pushvalue(L, 1);
jbe@140 324 lua_pushvalue(L, 3);
jbe@140 325 lua_pushvalue(L, 4);
jbe@140 326 lua_call(L, 3, 2);
jbe@143 327 if (lua_isnil(L, -2)) return 2;
jbe@143 328 lua_insert(L, -2);
jbe@143 329 len = lua_rawlen(L, -1);
jbe@143 330 if (ctx == 0) {
jbe@143 331 lua_replace(L, 5);
jbe@143 332 ctx = 1;
jbe@143 333 } else if (ctx == 1) {
jbe@143 334 lua_pushvalue(L, 5);
jbe@143 335 lua_newtable(L);
jbe@143 336 lua_replace(L, 5);
jbe@143 337 lua_rawseti(L, 5, 2);
jbe@143 338 lua_rawseti(L, 5, 1);
jbe@143 339 ctx = 2;
jbe@140 340 } else {
jbe@143 341 lua_rawseti(L, 5, lua_rawlen(L, 5) + 1);
jbe@140 342 }
jbe@144 343 if (strcmp(lua_tostring(L, -1), "block") != 0) break;
jbe@144 344 lua_pop(L, 1);
jbe@144 345 if (remaining >= 0 && len) {
jbe@143 346 remaining -= len;
jbe@143 347 lua_pushinteger(L, remaining);
jbe@143 348 lua_replace(L, 3);
jbe@143 349 }
jbe@140 350 lua_pushvalue(L, 2);
jbe@152 351 lua_callk(L, 0, 0, ctx, moonbr_io_read_cont);
jbe@140 352 }
jbe@140 353 if (ctx == 1) {
jbe@140 354 lua_pushvalue(L, 5);
jbe@140 355 } else {
jbe@140 356 luaL_Buffer buf;
jbe@140 357 lua_Integer i, chunkcount;
jbe@140 358 chunkcount = lua_rawlen(L, 5);
jbe@140 359 luaL_buffinit(L, &buf);
jbe@140 360 for (i=1; i<=chunkcount && i>0; i++) {
jbe@140 361 lua_rawgeti(L, 5, i);
jbe@140 362 luaL_addvalue(&buf);
jbe@140 363 }
jbe@140 364 luaL_pushresult(&buf);
jbe@140 365 }
jbe@143 366 lua_pushvalue(L, -2);
jbe@143 367 return 2;
jbe@140 368 }
jbe@140 369
jbe@140 370 static int moonbr_io_read_call(lua_State *L) {
jbe@140 371 lua_settop(L, 4);
jbe@140 372 lua_pushnil(L);
jbe@140 373 #if LUA_VERSION_NUM >= 503
jbe@140 374 return moonbr_io_read_cont(L, 0, 0);
jbe@140 375 #else
jbe@140 376 return moonbr_io_read_cont(L);
jbe@140 377 #endif
jbe@140 378 }
jbe@140 379
jbe@145 380 moonbr_io_yield_wrapper(moonbr_io_read_yield, moonbr_io_read_call);
jbe@140 381
jbe@144 382 #if LUA_VERSION_NUM >= 503
jbe@144 383 static int moonbr_io_drain_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@144 384 #else
jbe@144 385 static int moonbr_io_drain_cont(lua_State *L) {
jbe@144 386 #endif
jbe@144 387 lua_Integer remaining, len;
jbe@144 388 size_t totallen = 0;
jbe@144 389 #if !(LUA_VERSION_NUM >= 503)
jbe@144 390 int ctx = 0;
jbe@144 391 lua_getctx(L, &ctx);
jbe@144 392 #endif
jbe@144 393 remaining = lua_tointeger(L, 3);
jbe@144 394 while (1) {
jbe@144 395 lua_pushcfunction(L, moonbr_io_drain_nb);
jbe@144 396 lua_pushvalue(L, 1);
jbe@144 397 lua_pushvalue(L, 3);
jbe@144 398 lua_pushvalue(L, 4);
jbe@144 399 lua_call(L, 3, 2);
jbe@144 400 if (lua_isnil(L, -2)) return 2;
jbe@144 401 lua_insert(L, -2);
jbe@144 402 len = lua_tointeger(L, -1);
jbe@144 403 lua_pop(L, 1);
jbe@144 404 totallen += len;
jbe@144 405 if (strcmp(lua_tostring(L, -1), "block") != 0) break;
jbe@144 406 lua_pop(L, 1);
jbe@144 407 if (remaining >= 0 && len) {
jbe@144 408 remaining -= len;
jbe@144 409 lua_pushinteger(L, remaining);
jbe@144 410 lua_replace(L, 3);
jbe@144 411 }
jbe@144 412 lua_pushvalue(L, 2);
jbe@152 413 lua_callk(L, 0, 0, ctx, moonbr_io_drain_cont);
jbe@144 414 }
jbe@144 415 lua_pushinteger(L, totallen);
jbe@144 416 lua_pushvalue(L, -2);
jbe@144 417 return 2;
jbe@144 418 }
jbe@144 419
jbe@144 420 static int moonbr_io_drain_call(lua_State *L) {
jbe@144 421 #if LUA_VERSION_NUM >= 503
jbe@144 422 return moonbr_io_drain_cont(L, 0, 0);
jbe@144 423 #else
jbe@144 424 return moonbr_io_drain_cont(L);
jbe@144 425 #endif
jbe@144 426 }
jbe@144 427
jbe@145 428 moonbr_io_yield_wrapper(moonbr_io_drain_yield, moonbr_io_drain_call);
jbe@144 429
jbe@81 430 static int moonbr_io_write_impl(lua_State *L, int nonblocking, int flush) {
jbe@80 431 moonbr_io_handle_t *handle;
jbe@80 432 int i, top;
jbe@80 433 const char *str;
jbe@92 434 size_t strlen;
jbe@103 435 ssize_t written;
jbe@80 436 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 437 if (handle->closed) luaL_error(L, "Attempt to write to a closed I/O handle");
jbe@94 438 if (handle->finished) luaL_error(L, "Attempt to write to a finished I/O handle");
jbe@81 439 if (handle->writeerr) {
jbe@80 440 lua_pushnil(L);
jbe@80 441 lua_pushliteral(L, "Previous write error");
jbe@80 442 return 2;
jbe@80 443 }
jbe@103 444 handle->writeerr = 1;
jbe@81 445 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@84 446 top = lua_gettop(L);
jbe@81 447 lua_getuservalue(L, 1);
jbe@103 448 lua_getfield(L, -1, "writequeue");
jbe@84 449 for (i=2; i<=top; i++) {
jbe@84 450 luaL_checklstring(L, i, &strlen);
jbe@84 451 lua_pushvalue(L, i);
jbe@84 452 lua_rawseti(L, -2, handle->writeqin++);
jbe@84 453 handle->writeleft += strlen;
jbe@81 454 }
jbe@132 455 if (flush) handle->flushedleft = handle->writeleft;
jbe@83 456 while (handle->writeqout != handle->writeqin) {
jbe@83 457 lua_rawgeti(L, -1, handle->writeqout);
jbe@81 458 str = lua_tolstring(L, -1, &strlen);
jbe@92 459 while (handle->writeqoff < strlen) {
jbe@103 460 if (
jbe@132 461 strlen - handle->writeqoff <
jbe@103 462 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103 463 ) {
jbe@103 464 memcpy(
jbe@103 465 handle->writebuf + handle->writebufin,
jbe@103 466 str + handle->writeqoff,
jbe@103 467 strlen - handle->writeqoff
jbe@103 468 );
jbe@103 469 handle->writebufin += strlen - handle->writeqoff;
jbe@80 470 break;
jbe@80 471 } else {
jbe@103 472 memcpy(
jbe@103 473 handle->writebuf + handle->writebufin,
jbe@103 474 str + handle->writeqoff,
jbe@103 475 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103 476 );
jbe@103 477 handle->writeqoff += MOONBR_IO_WRITEBUFLEN - handle->writebufin;
jbe@103 478 while (handle->writebufout < MOONBR_IO_WRITEBUFLEN) {
jbe@133 479 moonbr_io_handle_set_nopush(L, handle, 1);
jbe@103 480 written = write(
jbe@103 481 handle->fd,
jbe@103 482 handle->writebuf + handle->writebufout,
jbe@103 483 MOONBR_IO_WRITEBUFLEN - handle->writebufout
jbe@103 484 );
jbe@103 485 if (written < 0) {
jbe@81 486 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@81 487 goto moonbr_io_write_impl_block;
jbe@81 488 } else if (errno != EINTR) {
jbe@80 489 moonbr_io_errmsg();
jbe@80 490 lua_pushnil(L);
jbe@80 491 lua_pushstring(L, errmsg);
jbe@80 492 return 2;
jbe@80 493 }
jbe@103 494 } else {
jbe@103 495 handle->writebufout += written;
jbe@103 496 handle->writeleft -= written;
jbe@133 497 if (handle->flushedleft) {
jbe@133 498 if (written >= handle->flushedleft) {
jbe@133 499 handle->flushedleft = 0;
jbe@133 500 moonbr_io_handle_set_nopush(L, handle, 0);
jbe@133 501 } else {
jbe@133 502 handle->flushedleft -= written;
jbe@133 503 }
jbe@133 504 }
jbe@80 505 }
jbe@80 506 }
jbe@103 507 handle->writebufin = 0;
jbe@103 508 handle->writebufout = 0;
jbe@80 509 }
jbe@80 510 }
jbe@81 511 handle->writeqoff = 0;
jbe@81 512 lua_pop(L, 1);
jbe@81 513 lua_pushnil(L);
jbe@83 514 lua_rawseti(L, -2, handle->writeqout++);
jbe@80 515 }
jbe@132 516 while (handle->flushedleft) {
jbe@133 517 moonbr_io_handle_set_nopush(L, handle, 1);
jbe@132 518 written = write(
jbe@132 519 handle->fd,
jbe@132 520 handle->writebuf + handle->writebufout,
jbe@132 521 handle->writebufin - handle->writebufout
jbe@132 522 );
jbe@132 523 if (written < 0) {
jbe@132 524 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@132 525 goto moonbr_io_write_impl_block;
jbe@132 526 } else if (errno != EINTR) {
jbe@132 527 moonbr_io_errmsg();
jbe@132 528 lua_pushnil(L);
jbe@132 529 lua_pushstring(L, errmsg);
jbe@132 530 return 2;
jbe@81 531 }
jbe@132 532 } else {
jbe@132 533 handle->writebufout += written;
jbe@132 534 handle->writeleft -= written;
jbe@133 535 if (handle->flushedleft) {
jbe@133 536 if (written >= handle->flushedleft) {
jbe@133 537 handle->flushedleft = 0;
jbe@133 538 moonbr_io_handle_set_nopush(L, handle, 0);
jbe@133 539 } else {
jbe@133 540 handle->flushedleft -= written;
jbe@133 541 }
jbe@133 542 }
jbe@81 543 }
jbe@132 544 }
jbe@132 545 if (handle->writebufout == handle->writebufin) {
jbe@103 546 handle->writebufin = 0;
jbe@103 547 handle->writebufout = 0;
jbe@81 548 }
jbe@103 549 if (nonblocking) lua_pushinteger(L, 0);
jbe@103 550 else lua_pushvalue(L, 1);
jbe@103 551 handle->writeerr = 0;
jbe@80 552 return 1;
jbe@81 553 moonbr_io_write_impl_block:
jbe@91 554 lua_pushinteger(L, handle->writeleft);
jbe@103 555 handle->writeerr = 0;
jbe@81 556 return 1;
jbe@81 557 }
jbe@81 558
jbe@81 559 static int moonbr_io_write(lua_State *L) {
jbe@81 560 return moonbr_io_write_impl(L, 0, 0);
jbe@81 561 }
jbe@81 562
jbe@81 563 static int moonbr_io_write_nb(lua_State *L) {
jbe@81 564 return moonbr_io_write_impl(L, 1, 0);
jbe@80 565 }
jbe@80 566
jbe@80 567 static int moonbr_io_flush(lua_State *L) {
jbe@81 568 return moonbr_io_write_impl(L, 0, 1);
jbe@81 569 }
jbe@81 570
jbe@81 571 static int moonbr_io_flush_nb(lua_State *L) {
jbe@81 572 return moonbr_io_write_impl(L, 1, 1);
jbe@80 573 }
jbe@80 574
jbe@145 575 #if LUA_VERSION_NUM >= 503
jbe@145 576 static int moonbr_io_write_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@145 577 #else
jbe@145 578 static int moonbr_io_write_cont(lua_State *L) {
jbe@145 579 #endif
jbe@145 580 while (1) {
jbe@145 581 lua_pushcfunction(L, moonbr_io_write_nb);
jbe@145 582 lua_pushvalue(L, 1);
jbe@145 583 lua_call(L, 1, 2);
jbe@145 584 if (lua_isnil(L, -2)) return 2;
jbe@145 585 if (!lua_tointeger(L, -2)) {
jbe@145 586 lua_pushvalue(L, 1);
jbe@145 587 return 1;
jbe@145 588 }
jbe@145 589 lua_pop(L, 2);
jbe@145 590 lua_pushvalue(L, 2);
jbe@152 591 lua_callk(L, 0, 0, 0, moonbr_io_write_cont);
jbe@145 592 }
jbe@145 593 }
jbe@145 594
jbe@145 595 static int moonbr_io_write_call(lua_State *L) {
jbe@145 596 lua_pushcfunction(L, moonbr_io_write_nb);
jbe@145 597 lua_insert(L, 3);
jbe@145 598 lua_pushvalue(L, 1);
jbe@145 599 lua_insert(L, 4);
jbe@145 600 lua_call(L, lua_gettop(L) - 3, 2);
jbe@145 601 if (lua_isnil(L, -2)) return 2;
jbe@145 602 if (!lua_tointeger(L, -2)) {
jbe@145 603 lua_pushvalue(L, 1);
jbe@145 604 return 1;
jbe@145 605 }
jbe@145 606 #if LUA_VERSION_NUM >= 503
jbe@145 607 return moonbr_io_write_cont(L, 0, 0);
jbe@145 608 #else
jbe@145 609 return moonbr_io_write_cont(L);
jbe@145 610 #endif
jbe@145 611 }
jbe@145 612
jbe@145 613 moonbr_io_yield_wrapper(moonbr_io_write_yield, moonbr_io_write_call);
jbe@145 614
jbe@145 615 static int moonbr_io_flush_call(lua_State *L) {
jbe@145 616 lua_pushcfunction(L, moonbr_io_flush_nb);
jbe@145 617 lua_insert(L, 3);
jbe@145 618 lua_pushvalue(L, 1);
jbe@145 619 lua_insert(L, 4);
jbe@145 620 lua_call(L, lua_gettop(L) - 3, 2);
jbe@145 621 if (lua_isnil(L, -2)) return 2;
jbe@145 622 if (!lua_tointeger(L, -2)) {
jbe@145 623 lua_pushvalue(L, 1);
jbe@145 624 return 1;
jbe@145 625 }
jbe@145 626 #if LUA_VERSION_NUM >= 503
jbe@145 627 return moonbr_io_write_cont(L, 0, 0);
jbe@145 628 #else
jbe@145 629 return moonbr_io_write_cont(L);
jbe@145 630 #endif
jbe@145 631 }
jbe@145 632
jbe@145 633 moonbr_io_yield_wrapper(moonbr_io_flush_yield, moonbr_io_flush_call);
jbe@145 634
jbe@88 635 static int moonbr_io_finish(lua_State *L) {
jbe@88 636 moonbr_io_handle_t *handle;
jbe@88 637 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 638 if (handle->closed) luaL_error(L, "Attempt to finish a closed I/O handle");
jbe@94 639 if (handle->finished) luaL_error(L, "Attempt to finish a finished I/O handle");
jbe@94 640 if (handle->writeleft) {
jbe@94 641 lua_pushcfunction(L, moonbr_io_flush);
jbe@94 642 lua_pushvalue(L, 1);
jbe@116 643 if (lua_pcall(L, 1, 2, 0)) {
jbe@116 644 handle->finished = 1;
jbe@116 645 lua_error(L);
jbe@116 646 }
jbe@94 647 if (!lua_toboolean(L, -2)) {
jbe@94 648 handle->finished = 1;
jbe@94 649 return 2;
jbe@88 650 }
jbe@94 651 }
jbe@94 652 handle->finished = 1;
jbe@107 653 if (handle->addrfam == AF_INET6 || handle->addrfam == AF_INET) {
jbe@88 654 if (shutdown(handle->fd, SHUT_WR)) {
jbe@88 655 moonbr_io_errmsg();
jbe@88 656 lua_pushnil(L);
jbe@88 657 lua_pushstring(L, errmsg);
jbe@88 658 return 2;
jbe@88 659 }
jbe@94 660 } else {
jbe@94 661 if (close(handle->fd)) {
jbe@94 662 moonbr_io_errmsg();
jbe@94 663 handle->fd = -1;
jbe@94 664 lua_pushnil(L);
jbe@94 665 lua_pushstring(L, errmsg);
jbe@94 666 return 2;
jbe@94 667 }
jbe@94 668 handle->fd = -1; /* fake EOF on read */
jbe@88 669 }
jbe@88 670 lua_pushboolean(L, 1);
jbe@88 671 return 1;
jbe@88 672 }
jbe@88 673
jbe@94 674 static int moonbr_io_close_impl(lua_State *L, int reset) {
jbe@83 675 moonbr_io_handle_t *handle;
jbe@83 676 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 677 if (handle->closed) luaL_error(L, "Attempt to close a closed I/O handle");
jbe@94 678 if (!reset) {
jbe@87 679 if (handle->writeleft) {
jbe@87 680 lua_pushcfunction(L, moonbr_io_flush);
jbe@87 681 lua_pushvalue(L, 1);
jbe@116 682 if (lua_pcall(L, 1, 2, 0)) {
jbe@129 683 handle->closed = 1;
jbe@116 684 close(handle->fd);
jbe@116 685 handle->fd = -1;
jbe@116 686 lua_error(L);
jbe@116 687 }
jbe@129 688 handle->closed = 1;
jbe@87 689 if (!lua_toboolean(L, -2)) {
jbe@87 690 close(handle->fd);
jbe@87 691 handle->fd = -1;
jbe@87 692 return 2;
jbe@87 693 }
jbe@129 694 } else {
jbe@129 695 handle->closed = 1;
jbe@129 696 moonbr_io_handle_set_linger(L, handle, -1);
jbe@83 697 }
jbe@129 698 } else {
jbe@129 699 handle->closed = 1;
jbe@83 700 }
jbe@94 701 if (handle->fd >= 0) {
jbe@94 702 if (close(handle->fd)) {
jbe@94 703 moonbr_io_errmsg();
jbe@94 704 handle->fd = -1;
jbe@94 705 lua_pushnil(L);
jbe@94 706 lua_pushstring(L, errmsg);
jbe@94 707 return 2;
jbe@94 708 }
jbe@104 709 handle->fd = -1;
jbe@83 710 }
jbe@83 711 lua_pushboolean(L, 1);
jbe@83 712 return 1;
jbe@84 713
jbe@83 714 }
jbe@83 715
jbe@94 716 static int moonbr_io_close(lua_State *L) {
jbe@94 717 return moonbr_io_close_impl(L, 0);
jbe@94 718 }
jbe@94 719
jbe@84 720 static int moonbr_io_reset(lua_State *L) {
jbe@94 721 return moonbr_io_close_impl(L, 1);
jbe@84 722 }
jbe@84 723
jbe@108 724 static int moonbr_io_handlegc(lua_State *L) {
jbe@88 725 moonbr_io_handle_t *handle;
jbe@88 726 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@88 727 if (handle->fd >= 0) {
jbe@88 728 lua_pushcfunction(L, moonbr_io_close);
jbe@88 729 lua_pushvalue(L, 1);
jbe@88 730 lua_pushinteger(L, 0);
jbe@88 731 lua_call(L, 2, 0);
jbe@88 732 }
jbe@88 733 return 0;
jbe@88 734 }
jbe@88 735
jbe@100 736 void moonbr_io_closehandle(lua_State *L, int idx, int reset) {
jbe@88 737 moonbr_io_handle_t *handle;
jbe@88 738 handle = luaL_checkudata(L, idx, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@100 739 if (!handle->closed) {
jbe@100 740 lua_pushcfunction(L, reset ? moonbr_io_reset : moonbr_io_close);
jbe@100 741 lua_pushvalue(L, idx < 0 ? idx-1 : idx);
jbe@100 742 lua_call(L, 1, 0);
jbe@88 743 }
jbe@88 744 }
jbe@88 745
jbe@208 746 static int moonbr_io_pushhandle_impl(lua_State *L) {
jbe@208 747 int *fd;
jbe@79 748 moonbr_io_handle_t *handle;
jbe@107 749 struct sockaddr addr;
jbe@107 750 socklen_t addrlen;
jbe@208 751 fd = lua_touserdata(L, 1);
jbe@79 752 handle = lua_newuserdata(L, sizeof(moonbr_io_handle_t));
jbe@208 753 handle->fd = -1; /* avoid closing incomplete handle */
jbe@107 754 addrlen = sizeof(addr);
jbe@208 755 if (getsockname(*fd, &addr, &addrlen)) {
jbe@107 756 if (errno != ENOTSOCK) {
jbe@107 757 moonbr_io_errmsg();
jbe@107 758 luaL_error(L, "Unexpected error when examining socket: %s", errmsg);
jbe@107 759 }
jbe@107 760 handle->issock = 0;
jbe@107 761 } else {
jbe@107 762 handle->issock = 1;
jbe@107 763 handle->addrfam = addr.sa_family;
jbe@107 764 }
jbe@94 765 handle->finished = 0;
jbe@94 766 handle->closed = 0;
jbe@81 767 handle->nonblocking = -1;
jbe@95 768 handle->nopush = -1;
jbe@85 769 handle->readerr = 0;
jbe@105 770 handle->readbufin = 0;
jbe@105 771 handle->readbufout = 0;
jbe@81 772 handle->writeerr = 0;
jbe@81 773 handle->writeleft = 0;
jbe@132 774 handle->flushedleft = 0;
jbe@83 775 handle->writeqin = 0;
jbe@83 776 handle->writeqout = 0;
jbe@81 777 handle->writeqoff = 0;
jbe@103 778 handle->writebufin = 0;
jbe@103 779 handle->writebufout = 0;
jbe@208 780 handle->fd = *fd; /* required for set_linger call */
jbe@87 781 moonbr_io_handle_set_linger(L, handle, 0);
jbe@208 782 handle->fd = -1; /* avoid closing incomplete handle */
jbe@79 783 luaL_getmetatable(L, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 784 lua_setmetatable(L, -2);
jbe@79 785 lua_newtable(L); // uservalue
jbe@81 786 lua_newtable(L);
jbe@103 787 lua_setfield(L, -2, "writequeue");
jbe@79 788 lua_newtable(L); // public
jbe@107 789 if (handle->addrfam == AF_INET6) {
jbe@107 790 struct sockaddr_in6 addr_in6;
jbe@107 791 char addrstrbuf[INET6_ADDRSTRLEN];
jbe@107 792 const char *addrstr;
jbe@107 793 addrlen = sizeof(addr_in6);
jbe@208 794 if (getsockname(*fd, (struct sockaddr *)&addr_in6, &addrlen)) {
jbe@107 795 moonbr_io_errmsg();
jbe@107 796 luaL_error(L, "Could not determine local IP address/port: %s", errmsg);
jbe@107 797 }
jbe@107 798 if (addrlen > sizeof(addr_in6)) {
jbe@107 799 luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");
jbe@107 800 }
jbe@107 801 addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 802 if (!addrstr) {
jbe@107 803 moonbr_io_errmsg();
jbe@107 804 luaL_error(L, "Could not format local IP address: %s", errmsg);
jbe@107 805 } else {
jbe@107 806 lua_pushstring(L, addrstr);
jbe@107 807 lua_setfield(L, -2, "local_ip6");
jbe@107 808 }
jbe@107 809 lua_pushinteger(L, ntohs(addr_in6.sin6_port));
jbe@107 810 lua_setfield(L, -2, "local_tcpport");
jbe@208 811 if (getpeername(*fd, (struct sockaddr *)&addr_in6, &addrlen)) {
jbe@107 812 moonbr_io_errmsg();
jbe@107 813 luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);
jbe@107 814 }
jbe@107 815 if (addrlen > sizeof(addr_in6)) {
jbe@107 816 luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");
jbe@107 817 }
jbe@107 818 addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 819 if (!addrstr) {
jbe@107 820 moonbr_io_errmsg();
jbe@107 821 luaL_error(L, "Could not format remote IP address: %s", errmsg);
jbe@107 822 } else {
jbe@107 823 lua_pushstring(L, addrstr);
jbe@107 824 lua_setfield(L, -2, "remote_ip6");
jbe@107 825 }
jbe@107 826 lua_pushinteger(L, ntohs(addr_in6.sin6_port));
jbe@107 827 lua_setfield(L, -2, "remote_tcpport");
jbe@107 828 } else if (handle->addrfam == AF_INET) {
jbe@107 829 struct sockaddr_in addr_in;
jbe@107 830 char addrstrbuf[INET_ADDRSTRLEN];
jbe@107 831 const char *addrstr;
jbe@107 832 addrlen = sizeof(addr_in);
jbe@208 833 if (getsockname(*fd, (struct sockaddr *)&addr_in, &addrlen)) {
jbe@107 834 moonbr_io_errmsg();
jbe@107 835 luaL_error(L, "Could not determine local IP address/port: %s", errmsg);
jbe@107 836 }
jbe@107 837 if (addrlen > sizeof(addr_in)) {
jbe@107 838 luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");
jbe@107 839 }
jbe@107 840 addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 841 if (!addrstr) {
jbe@107 842 moonbr_io_errmsg();
jbe@107 843 luaL_error(L, "Could not format local IP address: %s", errmsg);
jbe@107 844 } else {
jbe@107 845 lua_pushstring(L, addrstr);
jbe@107 846 lua_setfield(L, -2, "local_ip4");
jbe@107 847 }
jbe@107 848 lua_pushinteger(L, ntohs(addr_in.sin_port));
jbe@107 849 lua_setfield(L, -2, "local_tcpport");
jbe@208 850 if (getpeername(*fd, (struct sockaddr *)&addr_in, &addrlen)) {
jbe@107 851 moonbr_io_errmsg();
jbe@107 852 luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);
jbe@107 853 }
jbe@107 854 if (addrlen > sizeof(addr_in)) {
jbe@107 855 luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");
jbe@107 856 }
jbe@107 857 addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 858 if (!addrstr) {
jbe@107 859 moonbr_io_errmsg();
jbe@107 860 luaL_error(L, "Could not format remote IP address: %s", errmsg);
jbe@107 861 } else {
jbe@107 862 lua_pushstring(L, addrstr);
jbe@107 863 lua_setfield(L, -2, "remote_ip4");
jbe@107 864 }
jbe@107 865 lua_pushinteger(L, ntohs(addr_in.sin_port));
jbe@107 866 lua_setfield(L, -2, "remote_tcpport");
jbe@107 867 }
jbe@79 868 luaL_getmetatable(L, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 869 lua_setmetatable(L, -2);
jbe@79 870 lua_setfield(L, -2, "public");
jbe@79 871 lua_setuservalue(L, -2);
jbe@208 872 handle->fd = *fd;
jbe@208 873 *fd = -1; /* closing is now handled by garbage collection */
jbe@208 874 return 1;
jbe@208 875 }
jbe@208 876
jbe@208 877 void moonbr_io_pushhandle(lua_State *L, int fd) {
jbe@208 878 lua_pushcfunction(L, moonbr_io_pushhandle_impl);
jbe@208 879 lua_pushlightuserdata(L, &fd);
jbe@208 880 if (lua_pcall(L, 1, 1, 0)) {
jbe@208 881 if (fd != -1) close(fd);
jbe@208 882 lua_error(L);
jbe@208 883 }
jbe@79 884 }
jbe@79 885
jbe@79 886 static int moonbr_io_handleindex(lua_State *L) {
jbe@80 887 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@205 888 luaL_checkany(L, 2);
jbe@79 889 lua_getuservalue(L, 1);
jbe@79 890 lua_getfield(L, -1, "public");
jbe@79 891 lua_pushvalue(L, 2);
jbe@79 892 lua_gettable(L, -2);
jbe@79 893 return 1;
jbe@79 894 }
jbe@79 895
jbe@79 896 static int moonbr_io_handlenewindex(lua_State *L) {
jbe@80 897 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@205 898 luaL_checkany(L, 2);
jbe@205 899 luaL_checkany(L, 3);
jbe@79 900 lua_getuservalue(L, 1);
jbe@79 901 lua_getfield(L, -1, "public");
jbe@79 902 lua_pushvalue(L, 2);
jbe@79 903 lua_pushvalue(L, 3);
jbe@79 904 lua_settable(L, -3);
jbe@79 905 return 0;
jbe@79 906 }
jbe@79 907
jbe@111 908 static int moonbr_io_localconnect_impl(lua_State *L, int nonblocking) {
jbe@111 909 const char *path;
jbe@111 910 struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };
jbe@111 911 const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@111 912 (void *)sockaddr.sun_path - (void *)&sockaddr
jbe@111 913 ) - 1; /* one byte for termination */
jbe@111 914 int sock;
jbe@111 915 path = luaL_checkstring(L, 1);
jbe@111 916 if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);
jbe@111 917 strcpy(sockaddr.sun_path, path);
jbe@111 918 sock = socket(
jbe@111 919 PF_LOCAL,
jbe@111 920 SOCK_STREAM | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@111 921 0
jbe@111 922 );
jbe@111 923 if (sock < 0) {
jbe@111 924 moonbr_io_errmsg();
jbe@111 925 lua_pushnil(L);
jbe@111 926 lua_pushstring(L, errmsg);
jbe@111 927 return 2;
jbe@111 928 }
jbe@111 929 if (connect(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
jbe@111 930 if (!nonblocking && errno == EINTR) {
jbe@111 931 moonbr_io_errmsg();
jbe@111 932 close(sock);
jbe@111 933 lua_pushnil(L);
jbe@111 934 lua_pushstring(L, errmsg);
jbe@111 935 return 2;
jbe@111 936 } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@111 937 moonbr_io_errmsg();
jbe@111 938 lua_pushnil(L);
jbe@111 939 lua_pushstring(L, errmsg);
jbe@111 940 return 2;
jbe@111 941 }
jbe@111 942 }
jbe@111 943 moonbr_io_pushhandle(L, sock);
jbe@111 944 return 1;
jbe@111 945 }
jbe@111 946
jbe@111 947 static int moonbr_io_localconnect(lua_State *L) {
jbe@111 948 return moonbr_io_localconnect_impl(L, 0);
jbe@111 949 }
jbe@111 950
jbe@111 951 static int moonbr_io_localconnect_nb(lua_State *L) {
jbe@111 952 return moonbr_io_localconnect_impl(L, 1);
jbe@111 953 }
jbe@111 954
jbe@99 955 static int moonbr_io_tcpconnect_impl(lua_State *L, int nonblocking) {
jbe@98 956 const char *host, *port;
jbe@98 957 struct addrinfo hints = { 0, };
jbe@98 958 struct addrinfo *res, *addrinfo;
jbe@98 959 int errcode;
jbe@98 960 int sock;
jbe@98 961 host = luaL_checkstring(L, 1);
jbe@98 962 port = luaL_checkstring(L, 2);
jbe@98 963 hints.ai_family = AF_UNSPEC;
jbe@98 964 hints.ai_socktype = SOCK_STREAM;
jbe@98 965 hints.ai_protocol = IPPROTO_TCP;
jbe@98 966 hints.ai_flags = AI_ADDRCONFIG;
jbe@98 967 errcode = getaddrinfo(host, port, &hints, &res);
jbe@98 968 if (errcode) {
jbe@102 969 freeaddrinfo(res);
jbe@98 970 if (errcode == EAI_SYSTEM) {
jbe@98 971 moonbr_io_errmsg();
jbe@98 972 lua_pushnil(L);
jbe@98 973 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@98 974 } else {
jbe@98 975 lua_pushnil(L);
jbe@98 976 lua_pushstring(L, gai_strerror(errcode));
jbe@98 977 }
jbe@98 978 return 2;
jbe@98 979 }
jbe@98 980 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 981 if (addrinfo->ai_family == AF_INET6) goto moonbr_io_tcpconnect_found;
jbe@98 982 }
jbe@98 983 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 984 if (addrinfo->ai_family == AF_INET) goto moonbr_io_tcpconnect_found;
jbe@98 985 }
jbe@98 986 addrinfo = res;
jbe@98 987 moonbr_io_tcpconnect_found:
jbe@99 988 sock = socket(
jbe@134 989 addrinfo->ai_family, /* NOTE: not correctly using PF_* but AF_* constants here */
jbe@99 990 addrinfo->ai_socktype | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@99 991 addrinfo->ai_protocol
jbe@99 992 );
jbe@98 993 if (sock < 0) {
jbe@98 994 moonbr_io_errmsg();
jbe@108 995 freeaddrinfo(res);
jbe@98 996 lua_pushnil(L);
jbe@98 997 lua_pushstring(L, errmsg);
jbe@108 998 return 2;
jbe@98 999 }
jbe@98 1000 if (connect(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@108 1001 freeaddrinfo(res);
jbe@99 1002 if (!nonblocking && errno == EINTR) {
jbe@99 1003 moonbr_io_errmsg();
jbe@99 1004 close(sock);
jbe@99 1005 lua_pushnil(L);
jbe@99 1006 lua_pushstring(L, errmsg);
jbe@99 1007 return 2;
jbe@99 1008 } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@99 1009 moonbr_io_errmsg();
jbe@99 1010 lua_pushnil(L);
jbe@99 1011 lua_pushstring(L, errmsg);
jbe@99 1012 return 2;
jbe@99 1013 }
jbe@108 1014 } else {
jbe@108 1015 freeaddrinfo(res);
jbe@98 1016 }
jbe@107 1017 moonbr_io_pushhandle(L, sock);
jbe@98 1018 return 1;
jbe@98 1019 }
jbe@98 1020
jbe@99 1021 static int moonbr_io_tcpconnect(lua_State *L) {
jbe@99 1022 return moonbr_io_tcpconnect_impl(L, 0);
jbe@99 1023 }
jbe@99 1024
jbe@99 1025 static int moonbr_io_tcpconnect_nb(lua_State *L) {
jbe@99 1026 return moonbr_io_tcpconnect_impl(L, 1);
jbe@99 1027 }
jbe@99 1028
jbe@112 1029 static int moonbr_io_locallisten(lua_State *L) {
jbe@112 1030 moonbr_io_listener_t *listener;
jbe@112 1031 const char *path;
jbe@118 1032 struct stat sb;
jbe@112 1033 struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };
jbe@112 1034 const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@112 1035 (void *)sockaddr.sun_path - (void *)&sockaddr
jbe@112 1036 ) - 1; /* one byte for termination */
jbe@112 1037 int sock;
jbe@112 1038 path = luaL_checkstring(L, 1);
jbe@112 1039 if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);
jbe@112 1040 strcpy(sockaddr.sun_path, path);
jbe@118 1041 if (stat(path, &sb) == 0) {
jbe@118 1042 if (S_ISSOCK(sb.st_mode)) unlink(path);
jbe@118 1043 }
jbe@112 1044 listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));
jbe@117 1045 listener->fd = -1;
jbe@112 1046 luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@112 1047 sock = socket(
jbe@112 1048 PF_LOCAL,
jbe@112 1049 SOCK_STREAM | SOCK_CLOEXEC,
jbe@112 1050 0
jbe@112 1051 );
jbe@112 1052 if (sock < 0) {
jbe@112 1053 moonbr_io_errmsg();
jbe@112 1054 lua_pushnil(L);
jbe@112 1055 lua_pushstring(L, errmsg);
jbe@112 1056 return 2;
jbe@112 1057 }
jbe@112 1058 if (bind(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
jbe@112 1059 moonbr_io_errmsg();
jbe@112 1060 close(sock);
jbe@112 1061 lua_pushnil(L);
jbe@112 1062 lua_pushstring(L, errmsg);
jbe@112 1063 return 2;
jbe@112 1064 }
jbe@112 1065 if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {
jbe@112 1066 moonbr_io_errmsg();
jbe@112 1067 close(sock);
jbe@112 1068 lua_pushnil(L);
jbe@112 1069 lua_pushstring(L, errmsg);
jbe@112 1070 return 2;
jbe@112 1071 }
jbe@112 1072 listener->fd = sock;
jbe@118 1073 listener->addrfam = AF_LOCAL;
jbe@112 1074 listener->nonblocking = -1;
jbe@112 1075 return 1;
jbe@112 1076 }
jbe@112 1077
jbe@108 1078 static int moonbr_io_tcplisten(lua_State *L) {
jbe@108 1079 moonbr_io_listener_t *listener;
jbe@108 1080 const char *host, *port;
jbe@108 1081 struct addrinfo hints = { 0, };
jbe@108 1082 struct addrinfo *res, *addrinfo;
jbe@108 1083 int errcode;
jbe@108 1084 int sock;
jbe@108 1085 host = luaL_optstring(L, 1, NULL);
jbe@108 1086 port = luaL_checkstring(L, 2);
jbe@108 1087 listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));
jbe@117 1088 listener->fd = -1;
jbe@108 1089 luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1090 hints.ai_family = AF_UNSPEC;
jbe@108 1091 hints.ai_socktype = SOCK_STREAM;
jbe@108 1092 hints.ai_protocol = IPPROTO_TCP;
jbe@108 1093 hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE;
jbe@108 1094 errcode = getaddrinfo(host, port, &hints, &res);
jbe@108 1095 if (errcode) {
jbe@108 1096 freeaddrinfo(res);
jbe@108 1097 if (errcode == EAI_SYSTEM) {
jbe@108 1098 moonbr_io_errmsg();
jbe@108 1099 lua_pushnil(L);
jbe@108 1100 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@108 1101 } else {
jbe@108 1102 lua_pushnil(L);
jbe@108 1103 lua_pushstring(L, gai_strerror(errcode));
jbe@108 1104 }
jbe@108 1105 return 2;
jbe@108 1106 }
jbe@108 1107 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 1108 if (addrinfo->ai_family == AF_INET6) goto moonbr_io_tcpconnect_found;
jbe@108 1109 }
jbe@108 1110 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 1111 if (addrinfo->ai_family == AF_INET) goto moonbr_io_tcpconnect_found;
jbe@108 1112 }
jbe@108 1113 addrinfo = res;
jbe@108 1114 moonbr_io_tcpconnect_found:
jbe@118 1115 listener->addrfam = addrinfo->ai_family;
jbe@108 1116 sock = socket(
jbe@134 1117 addrinfo->ai_family, /* NOTE: not correctly using PF_* but AF_* constants here */
jbe@108 1118 addrinfo->ai_socktype | SOCK_CLOEXEC,
jbe@108 1119 addrinfo->ai_protocol
jbe@108 1120 );
jbe@108 1121 if (sock < 0) {
jbe@108 1122 moonbr_io_errmsg();
jbe@108 1123 freeaddrinfo(res);
jbe@108 1124 lua_pushnil(L);
jbe@108 1125 lua_pushstring(L, errmsg);
jbe@108 1126 return 2;
jbe@108 1127 }
jbe@120 1128 {
jbe@120 1129 static const int reuseval = 1;
jbe@120 1130 if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &reuseval, sizeof(reuseval))) {
jbe@120 1131 moonbr_io_errmsg();
jbe@120 1132 freeaddrinfo(res);
jbe@120 1133 close(sock);
jbe@120 1134 lua_pushnil(L);
jbe@120 1135 lua_pushfstring(L, "Error while setting SO_REUSEADDR with setsockopt: %s", errmsg);
jbe@120 1136 return 2;
jbe@120 1137 }
jbe@120 1138 }
jbe@108 1139 if (bind(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@108 1140 moonbr_io_errmsg();
jbe@108 1141 freeaddrinfo(res);
jbe@108 1142 close(sock);
jbe@108 1143 lua_pushnil(L);
jbe@108 1144 lua_pushstring(L, errmsg);
jbe@108 1145 return 2;
jbe@108 1146 }
jbe@108 1147 freeaddrinfo(res);
jbe@108 1148 if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {
jbe@108 1149 moonbr_io_errmsg();
jbe@108 1150 close(sock);
jbe@108 1151 lua_pushnil(L);
jbe@108 1152 lua_pushstring(L, errmsg);
jbe@108 1153 return 2;
jbe@108 1154 }
jbe@108 1155 listener->fd = sock;
jbe@108 1156 listener->nonblocking = -1;
jbe@108 1157 return 1;
jbe@108 1158 }
jbe@108 1159
jbe@108 1160 static int moonbr_io_accept_impl(lua_State *L, int nonblocking) {
jbe@108 1161 moonbr_io_listener_t *listener;
jbe@108 1162 int fd;
jbe@108 1163 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1164 if (listener->fd < 0) luaL_error(L, "Attempt to use a closed listener");
jbe@108 1165 if (listener->nonblocking != nonblocking) {
jbe@108 1166 int flags;
jbe@108 1167 flags = fcntl(listener->fd, F_GETFL, 0);
jbe@108 1168 if (flags == -1) {
jbe@108 1169 moonbr_io_errmsg();
jbe@108 1170 close(listener->fd);
jbe@108 1171 listener->fd = -1;
jbe@108 1172 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@108 1173 }
jbe@108 1174 if (nonblocking) flags |= O_NONBLOCK;
jbe@108 1175 else flags &= ~O_NONBLOCK;
jbe@108 1176 if (fcntl(listener->fd, F_SETFL, flags) == -1) {
jbe@108 1177 moonbr_io_errmsg();
jbe@108 1178 close(listener->fd);
jbe@108 1179 listener->fd = -1;
jbe@108 1180 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@108 1181 }
jbe@108 1182 listener->nonblocking = nonblocking;
jbe@108 1183 }
jbe@108 1184 while (1) {
jbe@108 1185 fd = accept4(listener->fd, NULL, NULL, SOCK_CLOEXEC);
jbe@108 1186 if (fd < 0) {
jbe@108 1187 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@108 1188 lua_pushboolean(L, 0);
jbe@108 1189 lua_pushliteral(L, "No incoming connection pending");
jbe@108 1190 return 2;
jbe@108 1191 } else if (errno != EINTR) {
jbe@108 1192 moonbr_io_errmsg();
jbe@108 1193 lua_pushnil(L);
jbe@108 1194 lua_pushstring(L, errmsg);
jbe@108 1195 return 2;
jbe@108 1196 }
jbe@108 1197 } else {
jbe@108 1198 moonbr_io_pushhandle(L, fd);
jbe@108 1199 return 1;
jbe@108 1200 }
jbe@108 1201 }
jbe@108 1202 }
jbe@108 1203
jbe@108 1204 static int moonbr_io_accept(lua_State *L) {
jbe@108 1205 return moonbr_io_accept_impl(L, 0);
jbe@108 1206 }
jbe@108 1207
jbe@108 1208 static int moonbr_io_accept_nb(lua_State *L) {
jbe@108 1209 return moonbr_io_accept_impl(L, 1);
jbe@108 1210 }
jbe@108 1211
jbe@108 1212 static int moonbr_io_unlisten(lua_State *L) {
jbe@108 1213 moonbr_io_listener_t *listener;
jbe@118 1214 struct sockaddr_un addr;
jbe@118 1215 socklen_t addrlen;
jbe@118 1216 struct stat sb;
jbe@108 1217 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1218 if (listener->fd < 0) luaL_error(L, "Attempt to close a closed listener");
jbe@118 1219 addrlen = sizeof(addr);
jbe@118 1220 if (getsockname(listener->fd, (struct sockaddr *)&addr, &addrlen)) addrlen = 0;
jbe@108 1221 if (close(listener->fd)) {
jbe@108 1222 moonbr_io_errmsg();
jbe@108 1223 listener->fd = -1;
jbe@118 1224 if (addrlen && addrlen <= sizeof(addr)) {
jbe@118 1225 if (stat(addr.sun_path, &sb) == 0) {
jbe@118 1226 if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);
jbe@118 1227 }
jbe@118 1228 }
jbe@108 1229 lua_pushnil(L);
jbe@108 1230 lua_pushstring(L, errmsg);
jbe@108 1231 return 2;
jbe@108 1232 }
jbe@108 1233 listener->fd = -1;
jbe@118 1234 if (addrlen && addrlen <= sizeof(addr)) {
jbe@118 1235 if (stat(addr.sun_path, &sb) == 0) {
jbe@118 1236 if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);
jbe@118 1237 }
jbe@118 1238 }
jbe@108 1239 lua_pushboolean(L, 1);
jbe@108 1240 return 1;
jbe@108 1241 }
jbe@108 1242
jbe@108 1243 static int moonbr_io_listenergc(lua_State *L) {
jbe@108 1244 moonbr_io_listener_t *listener;
jbe@108 1245 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@117 1246 if (listener->fd >= 0) close(listener->fd);
jbe@108 1247 listener->fd = -1;
jbe@108 1248 return 0;
jbe@108 1249 }
jbe@108 1250
jbe@205 1251 static int moonbr_io_exec(lua_State *L) {
jbe@205 1252 char **argv;
jbe@205 1253 int i, argc;
jbe@205 1254 int sockin[2], sockout[2], sockerr[2];
jbe@205 1255 volatile int errorcond = 0;
jbe@205 1256 volatile char errmsgbuf[MOONBR_IO_MAXSTRERRORLEN];
jbe@205 1257 moonbr_io_child_t *child;
jbe@205 1258 argc = lua_gettop(L);
jbe@205 1259 argv = lua_newuserdata(L, (argc + 1) * sizeof(char *));
jbe@205 1260 for (i=0; i<argc; i++) argv[i] = (char *)luaL_checkstring(L, i+1);
jbe@205 1261 argv[argc] = NULL;
jbe@208 1262 child = lua_newuserdata(L, sizeof(moonbr_io_child_t));
jbe@208 1263 child->pid = 0;
jbe@208 1264 lua_newtable(L);
jbe@208 1265 lua_setuservalue(L, -2);
jbe@208 1266 luaL_getmetatable(L, MOONBR_IO_CHILD_MT_REGKEY);
jbe@208 1267 lua_setmetatable(L, -2);
jbe@206 1268 if (socketpair(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0, sockin)) {
jbe@205 1269 moonbr_io_errmsg();
jbe@205 1270 lua_pushnil(L);
jbe@205 1271 lua_pushfstring(L, "Could not create socket pair: %s", errmsg);
jbe@205 1272 return 2;
jbe@205 1273 }
jbe@206 1274 if (socketpair(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0, sockout)) {
jbe@205 1275 moonbr_io_errmsg();
jbe@205 1276 close(sockin[0]);
jbe@205 1277 close(sockin[1]);
jbe@205 1278 lua_pushnil(L);
jbe@205 1279 lua_pushfstring(L, "Could not create socket pair: %s", errmsg);
jbe@205 1280 return 2;
jbe@205 1281 }
jbe@206 1282 if (socketpair(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0, sockerr)) {
jbe@205 1283 moonbr_io_errmsg();
jbe@205 1284 close(sockin[0]);
jbe@205 1285 close(sockin[1]);
jbe@205 1286 close(sockout[0]);
jbe@205 1287 close(sockout[1]);
jbe@205 1288 lua_pushnil(L);
jbe@205 1289 lua_pushfstring(L, "Could not create socket pair: %s", errmsg);
jbe@205 1290 return 2;
jbe@205 1291 }
jbe@205 1292 child->pid = vfork();
jbe@205 1293 if (child->pid == -1) {
jbe@205 1294 moonbr_io_errmsg();
jbe@205 1295 close(sockin[0]);
jbe@205 1296 close(sockin[1]);
jbe@205 1297 close(sockout[0]);
jbe@205 1298 close(sockout[1]);
jbe@205 1299 close(sockerr[0]);
jbe@205 1300 close(sockerr[1]);
jbe@205 1301 lua_pushnil(L);
jbe@205 1302 lua_pushfstring(L, "Could not fork: %s", errmsg);
jbe@205 1303 return 2;
jbe@205 1304 }
jbe@205 1305 if (!child->pid) {
jbe@208 1306 if (dup2(sockin[1], 0) == -1) goto moonbr_io_exec_error1;
jbe@208 1307 if (dup2(sockout[1], 1) == -1) goto moonbr_io_exec_error1;
jbe@208 1308 if (dup2(sockerr[1], 2) == -1) goto moonbr_io_exec_error1;
jbe@205 1309 closefrom(4);
jbe@208 1310 if (fcntl(0, F_SETFD, 0) == -1) goto moonbr_io_exec_error1;
jbe@208 1311 if (fcntl(1, F_SETFD, 0) == -1) goto moonbr_io_exec_error1;
jbe@208 1312 if (fcntl(2, F_SETFD, 0) == -1) goto moonbr_io_exec_error1;
jbe@205 1313 if (execvp(argv[0], argv)) {
jbe@205 1314 errorcond = 2;
jbe@205 1315 strerror_r(errno, (char *)errmsgbuf, MOONBR_IO_MAXSTRERRORLEN);
jbe@205 1316 _exit(0);
jbe@205 1317 }
jbe@208 1318 moonbr_io_exec_error1:
jbe@206 1319 errorcond = 1;
jbe@206 1320 strerror_r(errno, (char *)errmsgbuf, MOONBR_IO_MAXSTRERRORLEN);
jbe@206 1321 _exit(0);
jbe@205 1322 }
jbe@205 1323 close(sockin[1]);
jbe@205 1324 close(sockout[1]);
jbe@205 1325 close(sockerr[1]);
jbe@205 1326 if (errorcond) {
jbe@205 1327 int status;
jbe@205 1328 close(sockin[0]);
jbe@205 1329 close(sockout[0]);
jbe@205 1330 close(sockerr[0]);
jbe@205 1331 while (waitpid(child->pid, &status, 0) == -1) {
jbe@205 1332 if (errno != EINTR) {
jbe@205 1333 moonbr_io_errmsg();
jbe@205 1334 luaL_error(L, "Error in waitpid call after unsuccessful exec: %s", errmsg);
jbe@205 1335 }
jbe@205 1336 }
jbe@208 1337 child->pid = 0;
jbe@205 1338 lua_pushnil(L);
jbe@205 1339 if (errorcond == 2) lua_pushfstring(L, "Could not execute: %s", errmsgbuf);
jbe@205 1340 else lua_pushfstring(L, "Error in fork: %s", errmsgbuf);
jbe@205 1341 return 2;
jbe@205 1342 }
jbe@208 1343 lua_pushcfunction(L, moonbr_io_pushhandle_impl);
jbe@208 1344 lua_pushlightuserdata(L, &sockin[0]);
jbe@208 1345 if (lua_pcall(L, 1, 1, 0)) {
jbe@208 1346 if (sockin[0] != -1) close(sockin[0]);
jbe@208 1347 close(sockout[0]);
jbe@208 1348 close(sockerr[0]);
jbe@208 1349 goto moonbr_io_exec_error2;
jbe@208 1350 }
jbe@205 1351 lua_setfield(L, -2, "stdin");
jbe@208 1352 lua_pushcfunction(L, moonbr_io_pushhandle_impl);
jbe@208 1353 lua_pushlightuserdata(L, &sockout[0]);
jbe@208 1354 if (lua_pcall(L, 1, 1, 0)) {
jbe@208 1355 if (sockout[0] != -1) close(sockout[0]);
jbe@208 1356 close(sockerr[0]);
jbe@208 1357 goto moonbr_io_exec_error2;
jbe@208 1358 }
jbe@205 1359 lua_setfield(L, -2, "stdout");
jbe@208 1360 lua_pushcfunction(L, moonbr_io_pushhandle_impl);
jbe@208 1361 lua_pushlightuserdata(L, &sockerr[0]);
jbe@208 1362 if (lua_pcall(L, 1, 1, 0)) {
jbe@208 1363 if (sockerr[0] != -1) close(sockerr[0]);
jbe@208 1364 goto moonbr_io_exec_error2;
jbe@208 1365 }
jbe@205 1366 lua_setfield(L, -2, "stderr");
jbe@205 1367 return 1;
jbe@208 1368 moonbr_io_exec_error2:
jbe@208 1369 {
jbe@208 1370 int status;
jbe@208 1371 while (waitpid(child->pid, &status, 0) == -1) {
jbe@208 1372 if (errno != EINTR) {
jbe@208 1373 moonbr_io_errmsg();
jbe@208 1374 luaL_error(L, "Error in waitpid call after error creating socket handles: %s", errmsg);
jbe@208 1375 }
jbe@208 1376 }
jbe@208 1377 }
jbe@208 1378 child->pid = 0;
jbe@208 1379 return lua_error(L);
jbe@205 1380 }
jbe@205 1381
jbe@205 1382 static int moonbr_io_childindex(lua_State *L) {
jbe@205 1383 luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205 1384 luaL_checkany(L, 2);
jbe@205 1385 lua_getuservalue(L, 1);
jbe@205 1386 lua_pushvalue(L, 2);
jbe@205 1387 lua_gettable(L, -2);
jbe@205 1388 if (lua_isnil(L, -1)) {
jbe@205 1389 luaL_getmetatable(L, MOONBR_IO_CHILD_PT_REGKEY);
jbe@205 1390 lua_pushvalue(L, 2);
jbe@205 1391 lua_gettable(L, -2);
jbe@205 1392 }
jbe@205 1393 return 1;
jbe@205 1394 }
jbe@205 1395
jbe@205 1396 static int moonbr_io_childnewindex(lua_State *L) {
jbe@205 1397 luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205 1398 luaL_checkany(L, 2);
jbe@205 1399 luaL_checkany(L, 3);
jbe@205 1400 lua_getuservalue(L, 1);
jbe@205 1401 lua_pushvalue(L, 2);
jbe@205 1402 lua_pushvalue(L, 3);
jbe@205 1403 lua_settable(L, -3);
jbe@205 1404 return 0;
jbe@205 1405 }
jbe@205 1406
jbe@205 1407 static int moonbr_io_childgc(lua_State *L) {
jbe@205 1408 moonbr_io_child_t *child;
jbe@205 1409 child = luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205 1410 if (child->pid) {
jbe@205 1411 int status;
jbe@205 1412 if (kill(child->pid, SIGKILL)) {
jbe@205 1413 moonbr_io_errmsg();
jbe@205 1414 luaL_error(L, "Error in kill call during garbage collection: %s", errmsg);
jbe@205 1415 }
jbe@205 1416 while (waitpid(child->pid, &status, 0) == -1) {
jbe@205 1417 if (errno != EINTR) {
jbe@205 1418 moonbr_io_errmsg();
jbe@205 1419 luaL_error(L, "Error in waitpid call during garbage collection: %s", errmsg);
jbe@205 1420 }
jbe@205 1421 }
jbe@205 1422 }
jbe@205 1423 return 0;
jbe@205 1424 }
jbe@205 1425
jbe@205 1426 static int moonbr_io_kill(lua_State *L) {
jbe@205 1427 moonbr_io_child_t *child;
jbe@205 1428 int sig;
jbe@205 1429 child = luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205 1430 sig = luaL_optinteger(L, 2, SIGTERM);
jbe@205 1431 if (!child->pid) luaL_error(L, "Attempt to kill an already collected child process");
jbe@205 1432 if (kill(child->pid, sig)) {
jbe@205 1433 moonbr_io_errmsg();
jbe@205 1434 luaL_error(L, "Error in kill call: %s", errmsg);
jbe@205 1435 }
jbe@205 1436 lua_settop(L, 1);
jbe@205 1437 return 1;
jbe@205 1438 }
jbe@205 1439
jbe@205 1440 static int moonbr_io_wait_impl(lua_State *L, int nonblocking) {
jbe@205 1441 moonbr_io_child_t *child;
jbe@205 1442 pid_t waitedpid;
jbe@205 1443 int status;
jbe@205 1444 child = luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205 1445 if (!child->pid) luaL_error(L, "Attempt to wait for an already collected child process");
jbe@205 1446 while ((waitedpid = waitpid(child->pid, &status, nonblocking ? WNOHANG : 0)) == -1) {
jbe@205 1447 if (errno != EINTR) {
jbe@205 1448 moonbr_io_errmsg();
jbe@205 1449 luaL_error(L, "Error in waitpid call: %s", errmsg);
jbe@205 1450 }
jbe@205 1451 }
jbe@205 1452 if (!waitedpid) {
jbe@205 1453 lua_pushnil(L);
jbe@205 1454 } else {
jbe@205 1455 child->pid = 0;
jbe@205 1456 if (WIFEXITED(status)) {
jbe@205 1457 lua_pushinteger(L, WEXITSTATUS(status));
jbe@205 1458 } else if (WIFSIGNALED(status)) {
jbe@205 1459 lua_pushinteger(L, -WTERMSIG(status));
jbe@205 1460 } else {
jbe@205 1461 luaL_error(L, "Unexpected status value returned by waitpid call");
jbe@205 1462 }
jbe@205 1463 }
jbe@205 1464 return 1;
jbe@205 1465 }
jbe@205 1466
jbe@205 1467 static int moonbr_io_wait(lua_State *L) {
jbe@205 1468 return moonbr_io_wait_impl(L, 0);
jbe@205 1469 }
jbe@205 1470
jbe@205 1471 static int moonbr_io_wait_nb(lua_State *L) {
jbe@205 1472 return moonbr_io_wait_impl(L, 1);
jbe@205 1473 }
jbe@205 1474
jbe@205 1475 #if LUA_VERSION_NUM >= 503
jbe@205 1476 static int moonbr_io_wait_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@205 1477 #else
jbe@205 1478 static int moonbr_io_wait_cont(lua_State *L) {
jbe@205 1479 #endif
jbe@205 1480 #if !(LUA_VERSION_NUM >= 503)
jbe@205 1481 int ctx = 0;
jbe@205 1482 lua_getctx(L, &ctx);
jbe@205 1483 #endif
jbe@205 1484 while (1) {
jbe@205 1485 lua_pushcfunction(L, moonbr_io_wait_nb);
jbe@205 1486 lua_pushvalue(L, 1);
jbe@205 1487 lua_call(L, 1, 1);
jbe@205 1488 if (!lua_isnil(L, -1)) break;
jbe@205 1489 lua_pushvalue(L, 2);
jbe@205 1490 lua_callk(L, 0, 0, ctx, moonbr_io_wait_cont);
jbe@205 1491 }
jbe@205 1492 return 1;
jbe@205 1493 }
jbe@205 1494
jbe@205 1495 static int moonbr_io_wait_call(lua_State *L) {
jbe@205 1496 lua_settop(L, 2);
jbe@205 1497 #if LUA_VERSION_NUM >= 503
jbe@205 1498 return moonbr_io_wait_cont(L, 0, 0);
jbe@205 1499 #else
jbe@205 1500 return moonbr_io_wait_cont(L);
jbe@205 1501 #endif
jbe@205 1502 }
jbe@205 1503
jbe@205 1504 moonbr_io_yield_wrapper(moonbr_io_wait_yield, moonbr_io_wait_call);
jbe@205 1505
jbe@106 1506 static int moonbr_io_poll(lua_State *L) {
jbe@106 1507 moonbr_io_handle_t *handle;
jbe@108 1508 moonbr_io_listener_t *listener;
jbe@106 1509 int fd, isnum;
jbe@106 1510 int nfds = 0;
jbe@106 1511 fd_set readfds, writefds, exceptfds;
jbe@106 1512 struct timeval timeout = {0, };
jbe@106 1513 int status;
jbe@106 1514 FD_ZERO(&readfds);
jbe@106 1515 FD_ZERO(&writefds);
jbe@106 1516 FD_ZERO(&exceptfds);
jbe@106 1517 if (!lua_isnoneornil(L, 1)) {
jbe@106 1518 luaL_checktype(L, 1, LUA_TTABLE);
jbe@106 1519 for (lua_pushnil(L); lua_next(L, 1); lua_pop(L, 1)) {
jbe@106 1520 if (lua_toboolean(L, -1)) {
jbe@106 1521 handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@106 1522 if (handle) {
jbe@109 1523 if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");
jbe@106 1524 fd = handle->fd;
jbe@122 1525 if (
jbe@122 1526 fd < 0 || /* fake EOF to simulate shutdown if fd < 0 */
jbe@122 1527 handle->readbufin != handle->readbufout /* data pending in buffer */
jbe@122 1528 ) {
jbe@109 1529 lua_pushboolean(L, 1);
jbe@109 1530 return 1;
jbe@109 1531 }
jbe@106 1532 } else {
jbe@108 1533 listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1534 if (listener) {
jbe@108 1535 fd = listener->fd;
jbe@108 1536 if (fd < 0) luaL_error(L, "Attempt to poll a closed listener");
jbe@108 1537 } else {
jbe@108 1538 fd = lua_tointegerx(L, -2, &isnum);
jbe@108 1539 if (!isnum) luaL_error(L, "Expected integer (file descriptor), I/O handle, or listener in table key");
jbe@108 1540 }
jbe@106 1541 }
jbe@138 1542 if (fd < 0 || fd >= FD_SETSIZE) luaL_error(L, "File descriptor out of valid range");
jbe@106 1543 FD_SET(fd, &readfds);
jbe@106 1544 if (fd+1 > nfds) nfds = fd+1;
jbe@106 1545 }
jbe@106 1546 }
jbe@106 1547 }
jbe@106 1548 if (!lua_isnoneornil(L, 2)) {
jbe@106 1549 luaL_checktype(L, 2, LUA_TTABLE);
jbe@106 1550 for (lua_pushnil(L); lua_next(L, 2); lua_pop(L, 1)) {
jbe@106 1551 if (lua_toboolean(L, -1)) {
jbe@106 1552 handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@106 1553 if (handle) {
jbe@109 1554 if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");
jbe@109 1555 if (handle->finished) luaL_error(L, "Attempt to write-poll a finished connection");
jbe@106 1556 fd = handle->fd;
jbe@106 1557 } else {
jbe@108 1558 listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@109 1559 if (listener) luaL_error(L, "Attempt to write-poll a listener");
jbe@109 1560 fd = lua_tointegerx(L, -2, &isnum);
jbe@109 1561 if (!isnum) luaL_error(L, "Expected integer (file descriptor) or I/O handle in table key");
jbe@106 1562 }
jbe@138 1563 if (fd < 0 || fd >= FD_SETSIZE) luaL_error(L, "File descriptor out of valid range");
jbe@106 1564 FD_SET(fd, &writefds);
jbe@106 1565 if (fd+1 > nfds) nfds = fd+1;
jbe@106 1566 }
jbe@106 1567 }
jbe@106 1568 }
jbe@106 1569 if (!lua_isnoneornil(L, 3)) {
jbe@106 1570 lua_Number n;
jbe@106 1571 n = lua_tonumberx(L, 3, &isnum);
jbe@146 1572 if (isnum && n<0) {
jbe@146 1573 lua_pushboolean(L, 0);
jbe@146 1574 lua_pushliteral(L, "Negative timeout");
jbe@146 1575 return 2;
jbe@146 1576 } else if (isnum && n>=0 && n<100000000) {
jbe@106 1577 timeout.tv_sec = n;
jbe@106 1578 timeout.tv_usec = 1e6 * (n - timeout.tv_sec);
jbe@106 1579 } else {
jbe@106 1580 luaL_argcheck(L, 0, 3, "not a valid timeout");
jbe@106 1581 }
jbe@106 1582 status = select(nfds, &readfds, &writefds, &exceptfds, &timeout);
jbe@106 1583 } else {
jbe@106 1584 status = select(nfds, &readfds, &writefds, &exceptfds, NULL);
jbe@106 1585 }
jbe@106 1586 if (status == -1) {
jbe@106 1587 if (errno == EINTR) {
jbe@146 1588 lua_pushnil(L);
jbe@106 1589 lua_pushliteral(L, "Signal received while polling file descriptors");
jbe@106 1590 return 2;
jbe@106 1591 } else {
jbe@106 1592 moonbr_io_errmsg();
jbe@106 1593 return luaL_error(L, "Unexpected error during \"select\" system call: %s", errmsg);
jbe@106 1594 }
jbe@106 1595 } else if (status == 0) {
jbe@106 1596 lua_pushboolean(L, 0);
jbe@106 1597 lua_pushliteral(L, "Timeout while polling file descriptors");
jbe@106 1598 return 2;
jbe@106 1599 } else {
jbe@106 1600 lua_pushboolean(L, 1);
jbe@106 1601 return 1;
jbe@106 1602 }
jbe@106 1603 }
jbe@106 1604
jbe@115 1605 static int moonbr_io_timeref(lua_State *L) {
jbe@115 1606 lua_Number sub;
jbe@115 1607 struct timespec tp;
jbe@115 1608 sub = luaL_optnumber(L, 1, 0);
jbe@115 1609 if (clock_gettime(CLOCK_MONOTONIC, &tp)) {
jbe@115 1610 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
jbe@115 1611 }
jbe@115 1612 lua_pushnumber(L, tp.tv_sec + tp.tv_nsec / 1.0e9 - sub);
jbe@115 1613 return 1;
jbe@115 1614 }
jbe@115 1615
jbe@79 1616 static const struct luaL_Reg moonbr_io_handle_methods[] = {
jbe@85 1617 {"read", moonbr_io_read},
jbe@85 1618 {"read_nb", moonbr_io_read_nb},
jbe@140 1619 {"read_call", moonbr_io_read_call},
jbe@140 1620 {"read_yield", moonbr_io_read_yield},
jbe@86 1621 {"drain", moonbr_io_drain},
jbe@86 1622 {"drain_nb", moonbr_io_drain_nb},
jbe@144 1623 {"drain_call", moonbr_io_drain_call},
jbe@144 1624 {"drain_yield", moonbr_io_drain_yield},
jbe@80 1625 {"write", moonbr_io_write},
jbe@81 1626 {"write_nb", moonbr_io_write_nb},
jbe@145 1627 {"write_call", moonbr_io_write_call},
jbe@145 1628 {"write_yield", moonbr_io_write_yield},
jbe@80 1629 {"flush", moonbr_io_flush},
jbe@81 1630 {"flush_nb", moonbr_io_flush_nb},
jbe@145 1631 {"flush_call", moonbr_io_flush_call},
jbe@145 1632 {"flush_yield", moonbr_io_flush_yield},
jbe@88 1633 {"finish", moonbr_io_finish},
jbe@87 1634 {"close", moonbr_io_close},
jbe@85 1635 {"reset", moonbr_io_reset},
jbe@79 1636 {NULL, NULL}
jbe@79 1637 };
jbe@79 1638
jbe@79 1639 static const struct luaL_Reg moonbr_io_handle_metamethods[] = {
jbe@79 1640 {"__index", moonbr_io_handleindex},
jbe@79 1641 {"__newindex", moonbr_io_handlenewindex},
jbe@108 1642 {"__gc", moonbr_io_handlegc},
jbe@108 1643 {NULL, NULL}
jbe@108 1644 };
jbe@108 1645
jbe@108 1646 static const struct luaL_Reg moonbr_io_listener_methods[] = {
jbe@108 1647 {"accept", moonbr_io_accept},
jbe@108 1648 {"accept_nb", moonbr_io_accept_nb},
jbe@108 1649 {"close", moonbr_io_unlisten},
jbe@108 1650 {NULL, NULL}
jbe@108 1651 };
jbe@108 1652
jbe@108 1653 static const struct luaL_Reg moonbr_io_listener_metamethods[] = {
jbe@108 1654 {"__gc", moonbr_io_listenergc},
jbe@79 1655 {NULL, NULL}
jbe@79 1656 };
jbe@79 1657
jbe@205 1658 static const struct luaL_Reg moonbr_io_child_methods[] = {
jbe@205 1659 {"kill", moonbr_io_kill},
jbe@205 1660 {"wait", moonbr_io_wait},
jbe@205 1661 {"wait_nb", moonbr_io_wait_nb},
jbe@205 1662 {"wait_call", moonbr_io_wait_call},
jbe@205 1663 {"wait_yield", moonbr_io_wait_yield},
jbe@205 1664 {NULL, NULL}
jbe@205 1665 };
jbe@205 1666
jbe@205 1667 static const struct luaL_Reg moonbr_io_child_metamethods[] = {
jbe@205 1668 {"__index", moonbr_io_childindex},
jbe@205 1669 {"__newindex", moonbr_io_childnewindex},
jbe@205 1670 {"__gc", moonbr_io_childgc},
jbe@205 1671 {NULL, NULL}
jbe@205 1672 };
jbe@205 1673
jbe@79 1674 static const struct luaL_Reg moonbr_io_module_funcs[] = {
jbe@111 1675 {"localconnect", moonbr_io_localconnect},
jbe@111 1676 {"localconnect_nb", moonbr_io_localconnect_nb},
jbe@98 1677 {"tcpconnect", moonbr_io_tcpconnect},
jbe@99 1678 {"tcpconnect_nb", moonbr_io_tcpconnect_nb},
jbe@112 1679 {"locallisten", moonbr_io_locallisten},
jbe@108 1680 {"tcplisten", moonbr_io_tcplisten},
jbe@205 1681 {"exec", moonbr_io_exec},
jbe@106 1682 {"poll", moonbr_io_poll},
jbe@115 1683 {"timeref", moonbr_io_timeref},
jbe@79 1684 {NULL, NULL}
jbe@79 1685 };
jbe@79 1686
jbe@79 1687 int luaopen_moonbridge_io(lua_State *L) {
jbe@79 1688
jbe@113 1689 signal(SIGPIPE, SIG_IGN); /* generate I/O errors instead of signal 13 */
jbe@113 1690
jbe@80 1691 lua_newtable(L); // module
jbe@80 1692
jbe@79 1693 lua_newtable(L); // public metatable
jbe@79 1694 lua_newtable(L); // handle methods
jbe@79 1695 luaL_setfuncs(L, moonbr_io_handle_methods, 0);
jbe@80 1696 lua_pushvalue(L, -1);
jbe@146 1697 lua_setfield(L, -4, "handle_pt");
jbe@79 1698 lua_setfield(L, -2, "__index");
jbe@79 1699 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 1700
jbe@79 1701 lua_newtable(L); // handle metatable
jbe@79 1702 luaL_setfuncs(L, moonbr_io_handle_metamethods, 0);
jbe@146 1703 lua_pushvalue(L, -1);
jbe@146 1704 lua_setfield(L, -3, "handle_mt");
jbe@79 1705 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 1706
jbe@108 1707 lua_newtable(L); // listener metatable
jbe@108 1708 luaL_setfuncs(L, moonbr_io_listener_metamethods, 0);
jbe@108 1709 lua_newtable(L); // listener methods
jbe@108 1710 luaL_setfuncs(L, moonbr_io_listener_methods, 0);
jbe@108 1711 lua_pushvalue(L, -1);
jbe@146 1712 lua_setfield(L, -4, "listener_pt");
jbe@108 1713 lua_setfield(L, -2, "__index");
jbe@146 1714 lua_pushvalue(L, -1);
jbe@146 1715 lua_setfield(L, -3, "listener_mt");
jbe@108 1716 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1717
jbe@205 1718 lua_newtable(L); // child methods
jbe@205 1719 luaL_setfuncs(L, moonbr_io_child_methods, 0);
jbe@205 1720 lua_pushvalue(L, -1);
jbe@205 1721 lua_setfield(L, -3, "child_pt");
jbe@205 1722 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_CHILD_PT_REGKEY);
jbe@205 1723 lua_newtable(L); // child metatable
jbe@205 1724 luaL_setfuncs(L, moonbr_io_child_metamethods, 0);
jbe@205 1725 lua_pushvalue(L, -1);
jbe@205 1726 lua_setfield(L, -3, "child_mt");
jbe@205 1727 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205 1728
jbe@205 1729 moonbr_io_pushhandle(L, 0);
jbe@205 1730 lua_setfield(L, -2, "stdin");
jbe@205 1731 moonbr_io_pushhandle(L, 1);
jbe@205 1732 lua_setfield(L, -2, "stdout");
jbe@205 1733 moonbr_io_pushhandle(L, 2);
jbe@205 1734 lua_setfield(L, -2, "stderr");
jbe@205 1735
jbe@79 1736 luaL_setfuncs(L, moonbr_io_module_funcs, 0);
jbe@79 1737 return 1;
jbe@79 1738
jbe@79 1739 }
jbe@79 1740

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