moonbridge

annotate moonbridge_io.c @ 206:56efa825bfc7

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Code cleanup regarding SOCK_CLOEXEC in moonbridge_io.c
author jbe
date Sun Jun 21 22:40:52 2015 +0200 (2015-06-21)
parents 5601a486e68a
children 77dc29ce7948
rev   line source
jbe@79 1
jbe@137 2 #if defined(__linux__)
jbe@137 3 #define _GNU_SOURCE
jbe@137 4 #endif
jbe@79 5 #include <stdlib.h>
jbe@135 6 #include <stdint.h>
jbe@135 7 #include <string.h>
jbe@135 8 #include <errno.h>
jbe@79 9 #include <unistd.h>
jbe@135 10 #include <signal.h>
jbe@135 11 #include <fcntl.h>
jbe@135 12 #include <sys/stat.h>
jbe@79 13 #include <sys/socket.h>
jbe@111 14 #include <sys/un.h>
jbe@95 15 #include <netinet/in.h>
jbe@95 16 #include <netinet/tcp.h>
jbe@135 17 #include <sys/select.h>
jbe@136 18 #include <time.h>
jbe@135 19 #include <netdb.h>
jbe@107 20 #include <arpa/inet.h>
jbe@205 21 #include <sys/types.h>
jbe@205 22 #include <sys/wait.h>
jbe@79 23
jbe@79 24 #include <lua.h>
jbe@79 25 #include <lauxlib.h>
jbe@79 26 #include <lualib.h>
jbe@79 27
jbe@149 28 #include <assert.h>
jbe@149 29
jbe@80 30 #define MOONBR_IO_MAXSTRERRORLEN 80
jbe@85 31 #define MOONBR_IO_READBUFLEN 4096
jbe@80 32 #define MOONBR_IO_WRITEBUFLEN 4096
jbe@80 33
jbe@108 34 #define MOONBR_IO_LISTEN_BACKLOG 1024
jbe@108 35
jbe@80 36 #define moonbr_io_errmsg() \
jbe@80 37 char errmsg[MOONBR_IO_MAXSTRERRORLEN]; \
jbe@80 38 strerror_r(errno, errmsg, MOONBR_IO_MAXSTRERRORLEN)
jbe@80 39
jbe@79 40 #define MOONBR_IO_HANDLE_MT_REGKEY "moonbridge_io_handle"
jbe@79 41 #define MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY "moonbridge_io_handle_public"
jbe@108 42 #define MOONBR_IO_LISTENER_MT_REGKEY "moonbridge_io_listener"
jbe@205 43 #define MOONBR_IO_CHILD_MT_REGKEY "moonbridge_io_child"
jbe@205 44 #define MOONBR_IO_CHILD_PT_REGKEY "moonbridge_io_child_pt"
jbe@79 45
jbe@79 46 typedef struct {
jbe@79 47 int fd;
jbe@107 48 int issock;
jbe@107 49 sa_family_t addrfam;
jbe@94 50 int finished;
jbe@94 51 int closed;
jbe@81 52 int nonblocking;
jbe@95 53 int nopush;
jbe@85 54 int readerr;
jbe@105 55 int readbufin;
jbe@105 56 int readbufout;
jbe@81 57 int writeerr;
jbe@83 58 size_t writeleft;
jbe@132 59 size_t flushedleft;
jbe@83 60 #if LUA_VERSION_NUM >= 503
jbe@83 61 lua_Integer writeqin;
jbe@83 62 lua_Integer writeqout;
jbe@83 63 #else
jbe@83 64 int writeqin;
jbe@83 65 int writeqout;
jbe@83 66 #endif
jbe@83 67 size_t writeqoff;
jbe@103 68 int writebufin;
jbe@103 69 int writebufout;
jbe@85 70 char readbuf[MOONBR_IO_READBUFLEN];
jbe@80 71 char writebuf[MOONBR_IO_WRITEBUFLEN];
jbe@79 72 } moonbr_io_handle_t;
jbe@79 73
jbe@108 74 typedef struct {
jbe@108 75 int fd;
jbe@118 76 sa_family_t addrfam;
jbe@108 77 int nonblocking;
jbe@108 78 } moonbr_io_listener_t;
jbe@108 79
jbe@205 80 typedef struct {
jbe@205 81 pid_t pid;
jbe@205 82 int uninitialized_in;
jbe@205 83 int uninitialized_out;
jbe@205 84 int uninitialized_err;
jbe@205 85 } moonbr_io_child_t;
jbe@205 86
jbe@148 87 static int moonbr_io_yield(lua_State *L) {
jbe@149 88 return lua_yield(L, lua_gettop(L));
jbe@140 89 }
jbe@140 90
jbe@140 91 #if LUA_VERSION_NUM >= 503
jbe@140 92 static int moonbr_io_cont_returnall(lua_State *L, int status, lua_KContext ctx) {
jbe@140 93 #else
jbe@140 94 static int moonbr_io_cont_returnall(lua_State *L) {
jbe@140 95 #endif
jbe@140 96 return lua_gettop(L);
jbe@140 97 }
jbe@140 98
jbe@145 99 #define moonbr_io_yield_wrapper(yieldfunc, callfunc) \
jbe@145 100 static int yieldfunc(lua_State *L) { \
jbe@145 101 int args; \
jbe@145 102 lua_pushcfunction(L, callfunc); \
jbe@145 103 lua_insert(L, 1); \
jbe@145 104 args = lua_gettop(L); \
jbe@148 105 lua_pushcfunction(L, moonbr_io_yield); \
jbe@145 106 lua_insert(L, 3); \
jbe@145 107 lua_callk(L, args, LUA_MULTRET, 0, moonbr_io_cont_returnall); \
jbe@145 108 return lua_gettop(L); \
jbe@145 109 }
jbe@145 110
jbe@81 111 static void moonbr_io_handle_set_nonblocking(lua_State *L, moonbr_io_handle_t *handle, int nonblocking) {
jbe@95 112 int flags;
jbe@95 113 if (handle->nonblocking == nonblocking) return;
jbe@95 114 flags = fcntl(handle->fd, F_GETFL, 0);
jbe@95 115 if (flags == -1) {
jbe@95 116 moonbr_io_errmsg();
jbe@96 117 close(handle->fd);
jbe@96 118 handle->fd = -1;
jbe@96 119 handle->closed = 1;
jbe@95 120 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@81 121 }
jbe@95 122 if (nonblocking) flags |= O_NONBLOCK;
jbe@95 123 else flags &= ~O_NONBLOCK;
jbe@95 124 if (fcntl(handle->fd, F_SETFL, flags) == -1) {
jbe@95 125 moonbr_io_errmsg();
jbe@96 126 close(handle->fd);
jbe@96 127 handle->fd = -1;
jbe@96 128 handle->closed = 1;
jbe@95 129 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@95 130 }
jbe@95 131 handle->nonblocking = nonblocking;
jbe@81 132 }
jbe@81 133
jbe@87 134 static void moonbr_io_handle_set_linger(lua_State *L, moonbr_io_handle_t *handle, int timeout) {
jbe@87 135 struct linger lingerval = { 0, };
jbe@107 136 if (!handle->issock) return;
jbe@87 137 if (timeout >= 0) {
jbe@87 138 lingerval.l_onoff = 1;
jbe@87 139 lingerval.l_linger = timeout;
jbe@87 140 }
jbe@87 141 if (setsockopt(handle->fd, SOL_SOCKET, SO_LINGER, &lingerval, sizeof(lingerval))) {
jbe@87 142 moonbr_io_errmsg();
jbe@96 143 close(handle->fd);
jbe@96 144 handle->fd = -1;
jbe@96 145 handle->closed = 1;
jbe@95 146 luaL_error(L, "Unexpected error while setting SO_LINGER with setsockopt: %s", errmsg);
jbe@87 147 }
jbe@87 148 }
jbe@87 149
jbe@133 150 static inline void moonbr_io_handle_set_nopush(lua_State *L, moonbr_io_handle_t *handle, int nopush) {
jbe@96 151 #if defined(TCP_NOPUSH) || defined(TCP_CORK)
jbe@107 152 if (
jbe@107 153 !(handle->addrfam == AF_INET6 || handle->addrfam == AF_INET) ||
jbe@107 154 handle->nopush == nopush
jbe@107 155 ) return;
jbe@96 156 #if defined(TCP_NOPUSH)
jbe@96 157 if (setsockopt(handle->fd, IPPROTO_TCP, TCP_NOPUSH, &nopush, sizeof(nopush))) {
jbe@104 158 #elif defined(TCP_CORK)
jbe@104 159 if (setsockopt(handle->fd, IPPROTO_TCP, TCP_CORK, &nopush, sizeof(nopush))) {
jbe@104 160 #endif
jbe@96 161 moonbr_io_errmsg();
jbe@96 162 close(handle->fd);
jbe@96 163 handle->fd = -1;
jbe@96 164 handle->closed = 1;
jbe@104 165 #if defined(TCP_NOPUSH)
jbe@96 166 luaL_error(L, "Unexpected error while setting TCP_NOPUSH with setsockopt: %s", errmsg);
jbe@96 167 #elif defined(TCP_CORK)
jbe@95 168 luaL_error(L, "Unexpected error while setting TCP_CORK with setsockopt: %s", errmsg);
jbe@104 169 #endif
jbe@95 170 }
jbe@95 171 handle->nopush = nopush;
jbe@96 172 #else
jbe@96 173 #warning Neither TCP_NOPUSH nor TCP_CORK is available
jbe@96 174 #endif
jbe@95 175 }
jbe@95 176
jbe@86 177 static int moonbr_io_read_impl(lua_State *L, int nonblocking, int drain) {
jbe@85 178 moonbr_io_handle_t *handle;
jbe@85 179 lua_Integer maxread;
jbe@85 180 const char *terminatorstr;
jbe@85 181 size_t terminatorlen;
jbe@193 182 char terminator;
jbe@85 183 luaL_Buffer luabuf;
jbe@85 184 size_t luabufcnt = 0;
jbe@105 185 int remaining;
jbe@85 186 char *terminatorpos;
jbe@103 187 ssize_t bytesread;
jbe@85 188 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@153 189 maxread = luaL_optinteger(L, 2, -1);
jbe@85 190 terminatorstr = luaL_optlstring(L, 3, "", &terminatorlen);
jbe@85 191 if (terminatorlen) {
jbe@85 192 luaL_argcheck(L, terminatorlen == 1, 3, "single byte expected");
jbe@85 193 terminator = terminatorstr[0];
jbe@85 194 }
jbe@86 195 lua_settop(L, 1); /* return handle on drain, terminator string may be garbage collected */
jbe@94 196 if (handle->closed) luaL_error(L, "Attempt to read from a closed I/O handle");
jbe@85 197 if (handle->readerr) {
jbe@85 198 lua_pushnil(L);
jbe@85 199 lua_pushliteral(L, "Previous read error");
jbe@85 200 return 2;
jbe@85 201 }
jbe@143 202 if (handle->fd < 0) {
jbe@143 203 /* fake EOF to simulate shutdown */
jbe@143 204 if (!drain) lua_pushliteral(L, "");
jbe@143 205 else lua_pushinteger(L, 0);
jbe@143 206 lua_pushliteral(L, "eof");
jbe@143 207 return 2;
jbe@143 208 }
jbe@105 209 handle->readerr = 1;
jbe@85 210 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@86 211 if (!drain) luaL_buffinit(L, &luabuf);
jbe@85 212 while (1) {
jbe@105 213 remaining = -1;
jbe@142 214 terminatorpos = NULL;
jbe@105 215 if (
jbe@153 216 maxread >= 0 &&
jbe@143 217 handle->readbufin - handle->readbufout >= (size_t)maxread - luabufcnt
jbe@105 218 ) {
jbe@142 219 remaining = (size_t)maxread - luabufcnt;
jbe@193 220 if (terminatorlen) {
jbe@193 221 terminatorpos = memchr(
jbe@193 222 handle->readbuf + handle->readbufout,
jbe@193 223 terminator,
jbe@193 224 remaining
jbe@193 225 );
jbe@193 226 }
jbe@85 227 } else if (terminatorlen) {
jbe@105 228 terminatorpos = memchr(
jbe@105 229 handle->readbuf + handle->readbufout,
jbe@105 230 terminator,
jbe@105 231 handle->readbufin - handle->readbufout
jbe@105 232 );
jbe@85 233 }
jbe@142 234 if (terminatorpos) remaining = 1 + (
jbe@142 235 terminatorpos - (handle->readbuf + handle->readbufout)
jbe@142 236 );
jbe@105 237 if (remaining >= 0) {
jbe@86 238 if (!drain) {
jbe@105 239 luaL_addlstring(
jbe@105 240 &luabuf,
jbe@105 241 handle->readbuf + handle->readbufout,
jbe@105 242 remaining
jbe@105 243 );
jbe@86 244 luaL_pushresult(&luabuf);
jbe@90 245 } else {
jbe@105 246 lua_pushinteger(L, luabufcnt + remaining);
jbe@86 247 }
jbe@143 248 if (terminatorpos) lua_pushliteral(L, "term");
jbe@143 249 else lua_pushliteral(L, "maxlen");
jbe@105 250 handle->readbufout += remaining;
jbe@105 251 if (handle->readbufout == handle->readbufin) {
jbe@105 252 handle->readbufin = 0;
jbe@143 253 handle->readbufout = 0;
jbe@105 254 }
jbe@104 255 handle->readerr = 0;
jbe@143 256 return 2;
jbe@85 257 }
jbe@105 258 if (!drain) luaL_addlstring(
jbe@105 259 &luabuf,
jbe@105 260 handle->readbuf + handle->readbufout,
jbe@105 261 handle->readbufin - handle->readbufout
jbe@105 262 );
jbe@105 263 luabufcnt += handle->readbufin - handle->readbufout;
jbe@143 264 handle->readbufout = 0;
jbe@85 265 do {
jbe@103 266 bytesread = read(handle->fd, handle->readbuf, MOONBR_IO_READBUFLEN);
jbe@103 267 } while (bytesread < 0 && (errno == EINTR));
jbe@105 268 if (
jbe@105 269 bytesread == 0 || (
jbe@105 270 nonblocking &&
jbe@105 271 bytesread < 0 && (errno == EAGAIN || errno == EWOULDBLOCK)
jbe@105 272 )
jbe@105 273 ) {
jbe@105 274 handle->readbufin = 0;
jbe@143 275 if (!drain) luaL_pushresult(&luabuf);
jbe@143 276 else lua_pushinteger(L, luabufcnt);
jbe@143 277 if (bytesread == 0) lua_pushliteral(L, "eof");
jbe@143 278 else lua_pushliteral(L, "block");
jbe@105 279 handle->readerr = 0;
jbe@143 280 return 2;
jbe@105 281 }
jbe@103 282 if (bytesread < 0) {
jbe@85 283 moonbr_io_errmsg();
jbe@85 284 lua_pushnil(L);
jbe@85 285 lua_pushstring(L, errmsg);
jbe@85 286 return 2;
jbe@85 287 }
jbe@105 288 handle->readbufin = bytesread;
jbe@86 289 }
jbe@85 290 }
jbe@85 291
jbe@85 292 static int moonbr_io_read(lua_State *L) {
jbe@86 293 return moonbr_io_read_impl(L, 0, 0);
jbe@85 294 }
jbe@85 295
jbe@85 296 static int moonbr_io_read_nb(lua_State *L) {
jbe@86 297 return moonbr_io_read_impl(L, 1, 0);
jbe@86 298 }
jbe@86 299
jbe@86 300 static int moonbr_io_drain(lua_State *L) {
jbe@86 301 return moonbr_io_read_impl(L, 0, 1);
jbe@86 302 }
jbe@86 303
jbe@86 304 static int moonbr_io_drain_nb(lua_State *L) {
jbe@86 305 return moonbr_io_read_impl(L, 1, 1);
jbe@85 306 }
jbe@85 307
jbe@140 308 #if LUA_VERSION_NUM >= 503
jbe@140 309 static int moonbr_io_read_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@140 310 #else
jbe@140 311 static int moonbr_io_read_cont(lua_State *L) {
jbe@140 312 #endif
jbe@143 313 lua_Integer remaining;
jbe@143 314 size_t len;
jbe@140 315 #if !(LUA_VERSION_NUM >= 503)
jbe@140 316 int ctx = 0;
jbe@140 317 lua_getctx(L, &ctx);
jbe@140 318 #endif
jbe@140 319 remaining = lua_tointeger(L, 3);
jbe@140 320 while (1) {
jbe@140 321 lua_pushcfunction(L, moonbr_io_read_nb);
jbe@140 322 lua_pushvalue(L, 1);
jbe@140 323 lua_pushvalue(L, 3);
jbe@140 324 lua_pushvalue(L, 4);
jbe@140 325 lua_call(L, 3, 2);
jbe@143 326 if (lua_isnil(L, -2)) return 2;
jbe@143 327 lua_insert(L, -2);
jbe@143 328 len = lua_rawlen(L, -1);
jbe@143 329 if (ctx == 0) {
jbe@143 330 lua_replace(L, 5);
jbe@143 331 ctx = 1;
jbe@143 332 } else if (ctx == 1) {
jbe@143 333 lua_pushvalue(L, 5);
jbe@143 334 lua_newtable(L);
jbe@143 335 lua_replace(L, 5);
jbe@143 336 lua_rawseti(L, 5, 2);
jbe@143 337 lua_rawseti(L, 5, 1);
jbe@143 338 ctx = 2;
jbe@140 339 } else {
jbe@143 340 lua_rawseti(L, 5, lua_rawlen(L, 5) + 1);
jbe@140 341 }
jbe@144 342 if (strcmp(lua_tostring(L, -1), "block") != 0) break;
jbe@144 343 lua_pop(L, 1);
jbe@144 344 if (remaining >= 0 && len) {
jbe@143 345 remaining -= len;
jbe@143 346 lua_pushinteger(L, remaining);
jbe@143 347 lua_replace(L, 3);
jbe@143 348 }
jbe@140 349 lua_pushvalue(L, 2);
jbe@152 350 lua_callk(L, 0, 0, ctx, moonbr_io_read_cont);
jbe@140 351 }
jbe@140 352 if (ctx == 1) {
jbe@140 353 lua_pushvalue(L, 5);
jbe@140 354 } else {
jbe@140 355 luaL_Buffer buf;
jbe@140 356 lua_Integer i, chunkcount;
jbe@140 357 chunkcount = lua_rawlen(L, 5);
jbe@140 358 luaL_buffinit(L, &buf);
jbe@140 359 for (i=1; i<=chunkcount && i>0; i++) {
jbe@140 360 lua_rawgeti(L, 5, i);
jbe@140 361 luaL_addvalue(&buf);
jbe@140 362 }
jbe@140 363 luaL_pushresult(&buf);
jbe@140 364 }
jbe@143 365 lua_pushvalue(L, -2);
jbe@143 366 return 2;
jbe@140 367 }
jbe@140 368
jbe@140 369 static int moonbr_io_read_call(lua_State *L) {
jbe@140 370 lua_settop(L, 4);
jbe@140 371 lua_pushnil(L);
jbe@140 372 #if LUA_VERSION_NUM >= 503
jbe@140 373 return moonbr_io_read_cont(L, 0, 0);
jbe@140 374 #else
jbe@140 375 return moonbr_io_read_cont(L);
jbe@140 376 #endif
jbe@140 377 }
jbe@140 378
jbe@145 379 moonbr_io_yield_wrapper(moonbr_io_read_yield, moonbr_io_read_call);
jbe@140 380
jbe@144 381 #if LUA_VERSION_NUM >= 503
jbe@144 382 static int moonbr_io_drain_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@144 383 #else
jbe@144 384 static int moonbr_io_drain_cont(lua_State *L) {
jbe@144 385 #endif
jbe@144 386 lua_Integer remaining, len;
jbe@144 387 size_t totallen = 0;
jbe@144 388 #if !(LUA_VERSION_NUM >= 503)
jbe@144 389 int ctx = 0;
jbe@144 390 lua_getctx(L, &ctx);
jbe@144 391 #endif
jbe@144 392 remaining = lua_tointeger(L, 3);
jbe@144 393 while (1) {
jbe@144 394 lua_pushcfunction(L, moonbr_io_drain_nb);
jbe@144 395 lua_pushvalue(L, 1);
jbe@144 396 lua_pushvalue(L, 3);
jbe@144 397 lua_pushvalue(L, 4);
jbe@144 398 lua_call(L, 3, 2);
jbe@144 399 if (lua_isnil(L, -2)) return 2;
jbe@144 400 lua_insert(L, -2);
jbe@144 401 len = lua_tointeger(L, -1);
jbe@144 402 lua_pop(L, 1);
jbe@144 403 totallen += len;
jbe@144 404 if (strcmp(lua_tostring(L, -1), "block") != 0) break;
jbe@144 405 lua_pop(L, 1);
jbe@144 406 if (remaining >= 0 && len) {
jbe@144 407 remaining -= len;
jbe@144 408 lua_pushinteger(L, remaining);
jbe@144 409 lua_replace(L, 3);
jbe@144 410 }
jbe@144 411 lua_pushvalue(L, 2);
jbe@152 412 lua_callk(L, 0, 0, ctx, moonbr_io_drain_cont);
jbe@144 413 }
jbe@144 414 lua_pushinteger(L, totallen);
jbe@144 415 lua_pushvalue(L, -2);
jbe@144 416 return 2;
jbe@144 417 }
jbe@144 418
jbe@144 419 static int moonbr_io_drain_call(lua_State *L) {
jbe@144 420 #if LUA_VERSION_NUM >= 503
jbe@144 421 return moonbr_io_drain_cont(L, 0, 0);
jbe@144 422 #else
jbe@144 423 return moonbr_io_drain_cont(L);
jbe@144 424 #endif
jbe@144 425 }
jbe@144 426
jbe@145 427 moonbr_io_yield_wrapper(moonbr_io_drain_yield, moonbr_io_drain_call);
jbe@144 428
jbe@81 429 static int moonbr_io_write_impl(lua_State *L, int nonblocking, int flush) {
jbe@80 430 moonbr_io_handle_t *handle;
jbe@80 431 int i, top;
jbe@80 432 const char *str;
jbe@92 433 size_t strlen;
jbe@103 434 ssize_t written;
jbe@80 435 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 436 if (handle->closed) luaL_error(L, "Attempt to write to a closed I/O handle");
jbe@94 437 if (handle->finished) luaL_error(L, "Attempt to write to a finished I/O handle");
jbe@81 438 if (handle->writeerr) {
jbe@80 439 lua_pushnil(L);
jbe@80 440 lua_pushliteral(L, "Previous write error");
jbe@80 441 return 2;
jbe@80 442 }
jbe@103 443 handle->writeerr = 1;
jbe@81 444 moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@84 445 top = lua_gettop(L);
jbe@81 446 lua_getuservalue(L, 1);
jbe@103 447 lua_getfield(L, -1, "writequeue");
jbe@84 448 for (i=2; i<=top; i++) {
jbe@84 449 luaL_checklstring(L, i, &strlen);
jbe@84 450 lua_pushvalue(L, i);
jbe@84 451 lua_rawseti(L, -2, handle->writeqin++);
jbe@84 452 handle->writeleft += strlen;
jbe@81 453 }
jbe@132 454 if (flush) handle->flushedleft = handle->writeleft;
jbe@83 455 while (handle->writeqout != handle->writeqin) {
jbe@83 456 lua_rawgeti(L, -1, handle->writeqout);
jbe@81 457 str = lua_tolstring(L, -1, &strlen);
jbe@92 458 while (handle->writeqoff < strlen) {
jbe@103 459 if (
jbe@132 460 strlen - handle->writeqoff <
jbe@103 461 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103 462 ) {
jbe@103 463 memcpy(
jbe@103 464 handle->writebuf + handle->writebufin,
jbe@103 465 str + handle->writeqoff,
jbe@103 466 strlen - handle->writeqoff
jbe@103 467 );
jbe@103 468 handle->writebufin += strlen - handle->writeqoff;
jbe@80 469 break;
jbe@80 470 } else {
jbe@103 471 memcpy(
jbe@103 472 handle->writebuf + handle->writebufin,
jbe@103 473 str + handle->writeqoff,
jbe@103 474 MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103 475 );
jbe@103 476 handle->writeqoff += MOONBR_IO_WRITEBUFLEN - handle->writebufin;
jbe@103 477 while (handle->writebufout < MOONBR_IO_WRITEBUFLEN) {
jbe@133 478 moonbr_io_handle_set_nopush(L, handle, 1);
jbe@103 479 written = write(
jbe@103 480 handle->fd,
jbe@103 481 handle->writebuf + handle->writebufout,
jbe@103 482 MOONBR_IO_WRITEBUFLEN - handle->writebufout
jbe@103 483 );
jbe@103 484 if (written < 0) {
jbe@81 485 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@81 486 goto moonbr_io_write_impl_block;
jbe@81 487 } else if (errno != EINTR) {
jbe@80 488 moonbr_io_errmsg();
jbe@80 489 lua_pushnil(L);
jbe@80 490 lua_pushstring(L, errmsg);
jbe@80 491 return 2;
jbe@80 492 }
jbe@103 493 } else {
jbe@103 494 handle->writebufout += written;
jbe@103 495 handle->writeleft -= written;
jbe@133 496 if (handle->flushedleft) {
jbe@133 497 if (written >= handle->flushedleft) {
jbe@133 498 handle->flushedleft = 0;
jbe@133 499 moonbr_io_handle_set_nopush(L, handle, 0);
jbe@133 500 } else {
jbe@133 501 handle->flushedleft -= written;
jbe@133 502 }
jbe@133 503 }
jbe@80 504 }
jbe@80 505 }
jbe@103 506 handle->writebufin = 0;
jbe@103 507 handle->writebufout = 0;
jbe@80 508 }
jbe@80 509 }
jbe@81 510 handle->writeqoff = 0;
jbe@81 511 lua_pop(L, 1);
jbe@81 512 lua_pushnil(L);
jbe@83 513 lua_rawseti(L, -2, handle->writeqout++);
jbe@80 514 }
jbe@132 515 while (handle->flushedleft) {
jbe@133 516 moonbr_io_handle_set_nopush(L, handle, 1);
jbe@132 517 written = write(
jbe@132 518 handle->fd,
jbe@132 519 handle->writebuf + handle->writebufout,
jbe@132 520 handle->writebufin - handle->writebufout
jbe@132 521 );
jbe@132 522 if (written < 0) {
jbe@132 523 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@132 524 goto moonbr_io_write_impl_block;
jbe@132 525 } else if (errno != EINTR) {
jbe@132 526 moonbr_io_errmsg();
jbe@132 527 lua_pushnil(L);
jbe@132 528 lua_pushstring(L, errmsg);
jbe@132 529 return 2;
jbe@81 530 }
jbe@132 531 } else {
jbe@132 532 handle->writebufout += written;
jbe@132 533 handle->writeleft -= written;
jbe@133 534 if (handle->flushedleft) {
jbe@133 535 if (written >= handle->flushedleft) {
jbe@133 536 handle->flushedleft = 0;
jbe@133 537 moonbr_io_handle_set_nopush(L, handle, 0);
jbe@133 538 } else {
jbe@133 539 handle->flushedleft -= written;
jbe@133 540 }
jbe@133 541 }
jbe@81 542 }
jbe@132 543 }
jbe@132 544 if (handle->writebufout == handle->writebufin) {
jbe@103 545 handle->writebufin = 0;
jbe@103 546 handle->writebufout = 0;
jbe@81 547 }
jbe@103 548 if (nonblocking) lua_pushinteger(L, 0);
jbe@103 549 else lua_pushvalue(L, 1);
jbe@103 550 handle->writeerr = 0;
jbe@80 551 return 1;
jbe@81 552 moonbr_io_write_impl_block:
jbe@91 553 lua_pushinteger(L, handle->writeleft);
jbe@103 554 handle->writeerr = 0;
jbe@81 555 return 1;
jbe@81 556 }
jbe@81 557
jbe@81 558 static int moonbr_io_write(lua_State *L) {
jbe@81 559 return moonbr_io_write_impl(L, 0, 0);
jbe@81 560 }
jbe@81 561
jbe@81 562 static int moonbr_io_write_nb(lua_State *L) {
jbe@81 563 return moonbr_io_write_impl(L, 1, 0);
jbe@80 564 }
jbe@80 565
jbe@80 566 static int moonbr_io_flush(lua_State *L) {
jbe@81 567 return moonbr_io_write_impl(L, 0, 1);
jbe@81 568 }
jbe@81 569
jbe@81 570 static int moonbr_io_flush_nb(lua_State *L) {
jbe@81 571 return moonbr_io_write_impl(L, 1, 1);
jbe@80 572 }
jbe@80 573
jbe@145 574 #if LUA_VERSION_NUM >= 503
jbe@145 575 static int moonbr_io_write_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@145 576 #else
jbe@145 577 static int moonbr_io_write_cont(lua_State *L) {
jbe@145 578 #endif
jbe@145 579 while (1) {
jbe@145 580 lua_pushcfunction(L, moonbr_io_write_nb);
jbe@145 581 lua_pushvalue(L, 1);
jbe@145 582 lua_call(L, 1, 2);
jbe@145 583 if (lua_isnil(L, -2)) return 2;
jbe@145 584 if (!lua_tointeger(L, -2)) {
jbe@145 585 lua_pushvalue(L, 1);
jbe@145 586 return 1;
jbe@145 587 }
jbe@145 588 lua_pop(L, 2);
jbe@145 589 lua_pushvalue(L, 2);
jbe@152 590 lua_callk(L, 0, 0, 0, moonbr_io_write_cont);
jbe@145 591 }
jbe@145 592 }
jbe@145 593
jbe@145 594 static int moonbr_io_write_call(lua_State *L) {
jbe@145 595 lua_pushcfunction(L, moonbr_io_write_nb);
jbe@145 596 lua_insert(L, 3);
jbe@145 597 lua_pushvalue(L, 1);
jbe@145 598 lua_insert(L, 4);
jbe@145 599 lua_call(L, lua_gettop(L) - 3, 2);
jbe@145 600 if (lua_isnil(L, -2)) return 2;
jbe@145 601 if (!lua_tointeger(L, -2)) {
jbe@145 602 lua_pushvalue(L, 1);
jbe@145 603 return 1;
jbe@145 604 }
jbe@145 605 #if LUA_VERSION_NUM >= 503
jbe@145 606 return moonbr_io_write_cont(L, 0, 0);
jbe@145 607 #else
jbe@145 608 return moonbr_io_write_cont(L);
jbe@145 609 #endif
jbe@145 610 }
jbe@145 611
jbe@145 612 moonbr_io_yield_wrapper(moonbr_io_write_yield, moonbr_io_write_call);
jbe@145 613
jbe@145 614 static int moonbr_io_flush_call(lua_State *L) {
jbe@145 615 lua_pushcfunction(L, moonbr_io_flush_nb);
jbe@145 616 lua_insert(L, 3);
jbe@145 617 lua_pushvalue(L, 1);
jbe@145 618 lua_insert(L, 4);
jbe@145 619 lua_call(L, lua_gettop(L) - 3, 2);
jbe@145 620 if (lua_isnil(L, -2)) return 2;
jbe@145 621 if (!lua_tointeger(L, -2)) {
jbe@145 622 lua_pushvalue(L, 1);
jbe@145 623 return 1;
jbe@145 624 }
jbe@145 625 #if LUA_VERSION_NUM >= 503
jbe@145 626 return moonbr_io_write_cont(L, 0, 0);
jbe@145 627 #else
jbe@145 628 return moonbr_io_write_cont(L);
jbe@145 629 #endif
jbe@145 630 }
jbe@145 631
jbe@145 632 moonbr_io_yield_wrapper(moonbr_io_flush_yield, moonbr_io_flush_call);
jbe@145 633
jbe@88 634 static int moonbr_io_finish(lua_State *L) {
jbe@88 635 moonbr_io_handle_t *handle;
jbe@88 636 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 637 if (handle->closed) luaL_error(L, "Attempt to finish a closed I/O handle");
jbe@94 638 if (handle->finished) luaL_error(L, "Attempt to finish a finished I/O handle");
jbe@94 639 if (handle->writeleft) {
jbe@94 640 lua_pushcfunction(L, moonbr_io_flush);
jbe@94 641 lua_pushvalue(L, 1);
jbe@116 642 if (lua_pcall(L, 1, 2, 0)) {
jbe@116 643 handle->finished = 1;
jbe@116 644 lua_error(L);
jbe@116 645 }
jbe@94 646 if (!lua_toboolean(L, -2)) {
jbe@94 647 handle->finished = 1;
jbe@94 648 return 2;
jbe@88 649 }
jbe@94 650 }
jbe@94 651 handle->finished = 1;
jbe@107 652 if (handle->addrfam == AF_INET6 || handle->addrfam == AF_INET) {
jbe@88 653 if (shutdown(handle->fd, SHUT_WR)) {
jbe@88 654 moonbr_io_errmsg();
jbe@88 655 lua_pushnil(L);
jbe@88 656 lua_pushstring(L, errmsg);
jbe@88 657 return 2;
jbe@88 658 }
jbe@94 659 } else {
jbe@94 660 if (close(handle->fd)) {
jbe@94 661 moonbr_io_errmsg();
jbe@94 662 handle->fd = -1;
jbe@94 663 lua_pushnil(L);
jbe@94 664 lua_pushstring(L, errmsg);
jbe@94 665 return 2;
jbe@94 666 }
jbe@94 667 handle->fd = -1; /* fake EOF on read */
jbe@88 668 }
jbe@88 669 lua_pushboolean(L, 1);
jbe@88 670 return 1;
jbe@88 671 }
jbe@88 672
jbe@94 673 static int moonbr_io_close_impl(lua_State *L, int reset) {
jbe@83 674 moonbr_io_handle_t *handle;
jbe@83 675 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94 676 if (handle->closed) luaL_error(L, "Attempt to close a closed I/O handle");
jbe@94 677 if (!reset) {
jbe@87 678 if (handle->writeleft) {
jbe@87 679 lua_pushcfunction(L, moonbr_io_flush);
jbe@87 680 lua_pushvalue(L, 1);
jbe@116 681 if (lua_pcall(L, 1, 2, 0)) {
jbe@129 682 handle->closed = 1;
jbe@116 683 close(handle->fd);
jbe@116 684 handle->fd = -1;
jbe@116 685 lua_error(L);
jbe@116 686 }
jbe@129 687 handle->closed = 1;
jbe@87 688 if (!lua_toboolean(L, -2)) {
jbe@87 689 close(handle->fd);
jbe@87 690 handle->fd = -1;
jbe@87 691 return 2;
jbe@87 692 }
jbe@129 693 } else {
jbe@129 694 handle->closed = 1;
jbe@129 695 moonbr_io_handle_set_linger(L, handle, -1);
jbe@83 696 }
jbe@129 697 } else {
jbe@129 698 handle->closed = 1;
jbe@83 699 }
jbe@94 700 if (handle->fd >= 0) {
jbe@94 701 if (close(handle->fd)) {
jbe@94 702 moonbr_io_errmsg();
jbe@94 703 handle->fd = -1;
jbe@94 704 lua_pushnil(L);
jbe@94 705 lua_pushstring(L, errmsg);
jbe@94 706 return 2;
jbe@94 707 }
jbe@104 708 handle->fd = -1;
jbe@83 709 }
jbe@83 710 lua_pushboolean(L, 1);
jbe@83 711 return 1;
jbe@84 712
jbe@83 713 }
jbe@83 714
jbe@94 715 static int moonbr_io_close(lua_State *L) {
jbe@94 716 return moonbr_io_close_impl(L, 0);
jbe@94 717 }
jbe@94 718
jbe@84 719 static int moonbr_io_reset(lua_State *L) {
jbe@94 720 return moonbr_io_close_impl(L, 1);
jbe@84 721 }
jbe@84 722
jbe@108 723 static int moonbr_io_handlegc(lua_State *L) {
jbe@88 724 moonbr_io_handle_t *handle;
jbe@88 725 handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@88 726 if (handle->fd >= 0) {
jbe@88 727 lua_pushcfunction(L, moonbr_io_close);
jbe@88 728 lua_pushvalue(L, 1);
jbe@88 729 lua_pushinteger(L, 0);
jbe@88 730 lua_call(L, 2, 0);
jbe@88 731 }
jbe@88 732 return 0;
jbe@88 733 }
jbe@88 734
jbe@100 735 void moonbr_io_closehandle(lua_State *L, int idx, int reset) {
jbe@88 736 moonbr_io_handle_t *handle;
jbe@88 737 handle = luaL_checkudata(L, idx, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@100 738 if (!handle->closed) {
jbe@100 739 lua_pushcfunction(L, reset ? moonbr_io_reset : moonbr_io_close);
jbe@100 740 lua_pushvalue(L, idx < 0 ? idx-1 : idx);
jbe@100 741 lua_call(L, 1, 0);
jbe@88 742 }
jbe@88 743 }
jbe@88 744
jbe@107 745 void moonbr_io_pushhandle(lua_State *L, int fd) {
jbe@79 746 moonbr_io_handle_t *handle;
jbe@107 747 struct sockaddr addr;
jbe@107 748 socklen_t addrlen;
jbe@79 749 handle = lua_newuserdata(L, sizeof(moonbr_io_handle_t));
jbe@79 750 handle->fd = fd;
jbe@107 751 addrlen = sizeof(addr);
jbe@107 752 if (getsockname(fd, &addr, &addrlen)) {
jbe@107 753 if (errno != ENOTSOCK) {
jbe@107 754 moonbr_io_errmsg();
jbe@107 755 luaL_error(L, "Unexpected error when examining socket: %s", errmsg);
jbe@107 756 }
jbe@107 757 handle->issock = 0;
jbe@107 758 } else {
jbe@107 759 handle->issock = 1;
jbe@107 760 handle->addrfam = addr.sa_family;
jbe@107 761 }
jbe@94 762 handle->finished = 0;
jbe@94 763 handle->closed = 0;
jbe@81 764 handle->nonblocking = -1;
jbe@95 765 handle->nopush = -1;
jbe@85 766 handle->readerr = 0;
jbe@105 767 handle->readbufin = 0;
jbe@105 768 handle->readbufout = 0;
jbe@81 769 handle->writeerr = 0;
jbe@81 770 handle->writeleft = 0;
jbe@132 771 handle->flushedleft = 0;
jbe@83 772 handle->writeqin = 0;
jbe@83 773 handle->writeqout = 0;
jbe@81 774 handle->writeqoff = 0;
jbe@103 775 handle->writebufin = 0;
jbe@103 776 handle->writebufout = 0;
jbe@87 777 moonbr_io_handle_set_linger(L, handle, 0);
jbe@79 778 luaL_getmetatable(L, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 779 lua_setmetatable(L, -2);
jbe@79 780 lua_newtable(L); // uservalue
jbe@81 781 lua_newtable(L);
jbe@103 782 lua_setfield(L, -2, "writequeue");
jbe@79 783 lua_newtable(L); // public
jbe@107 784 if (handle->addrfam == AF_INET6) {
jbe@107 785 struct sockaddr_in6 addr_in6;
jbe@107 786 char addrstrbuf[INET6_ADDRSTRLEN];
jbe@107 787 const char *addrstr;
jbe@107 788 addrlen = sizeof(addr_in6);
jbe@107 789 if (getsockname(fd, (struct sockaddr *)&addr_in6, &addrlen)) {
jbe@107 790 moonbr_io_errmsg();
jbe@107 791 luaL_error(L, "Could not determine local IP address/port: %s", errmsg);
jbe@107 792 }
jbe@107 793 if (addrlen > sizeof(addr_in6)) {
jbe@107 794 luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");
jbe@107 795 }
jbe@107 796 addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 797 if (!addrstr) {
jbe@107 798 moonbr_io_errmsg();
jbe@107 799 luaL_error(L, "Could not format local IP address: %s", errmsg);
jbe@107 800 } else {
jbe@107 801 lua_pushstring(L, addrstr);
jbe@107 802 lua_setfield(L, -2, "local_ip6");
jbe@107 803 }
jbe@107 804 lua_pushinteger(L, ntohs(addr_in6.sin6_port));
jbe@107 805 lua_setfield(L, -2, "local_tcpport");
jbe@107 806 if (getpeername(fd, (struct sockaddr *)&addr_in6, &addrlen)) {
jbe@107 807 moonbr_io_errmsg();
jbe@107 808 luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);
jbe@107 809 }
jbe@107 810 if (addrlen > sizeof(addr_in6)) {
jbe@107 811 luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");
jbe@107 812 }
jbe@107 813 addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 814 if (!addrstr) {
jbe@107 815 moonbr_io_errmsg();
jbe@107 816 luaL_error(L, "Could not format remote IP address: %s", errmsg);
jbe@107 817 } else {
jbe@107 818 lua_pushstring(L, addrstr);
jbe@107 819 lua_setfield(L, -2, "remote_ip6");
jbe@107 820 }
jbe@107 821 lua_pushinteger(L, ntohs(addr_in6.sin6_port));
jbe@107 822 lua_setfield(L, -2, "remote_tcpport");
jbe@107 823 } else if (handle->addrfam == AF_INET) {
jbe@107 824 struct sockaddr_in addr_in;
jbe@107 825 char addrstrbuf[INET_ADDRSTRLEN];
jbe@107 826 const char *addrstr;
jbe@107 827 addrlen = sizeof(addr_in);
jbe@107 828 if (getsockname(fd, (struct sockaddr *)&addr_in, &addrlen)) {
jbe@107 829 moonbr_io_errmsg();
jbe@107 830 luaL_error(L, "Could not determine local IP address/port: %s", errmsg);
jbe@107 831 }
jbe@107 832 if (addrlen > sizeof(addr_in)) {
jbe@107 833 luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");
jbe@107 834 }
jbe@107 835 addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 836 if (!addrstr) {
jbe@107 837 moonbr_io_errmsg();
jbe@107 838 luaL_error(L, "Could not format local IP address: %s", errmsg);
jbe@107 839 } else {
jbe@107 840 lua_pushstring(L, addrstr);
jbe@107 841 lua_setfield(L, -2, "local_ip4");
jbe@107 842 }
jbe@107 843 lua_pushinteger(L, ntohs(addr_in.sin_port));
jbe@107 844 lua_setfield(L, -2, "local_tcpport");
jbe@107 845 if (getpeername(fd, (struct sockaddr *)&addr_in, &addrlen)) {
jbe@107 846 moonbr_io_errmsg();
jbe@107 847 luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);
jbe@107 848 }
jbe@107 849 if (addrlen > sizeof(addr_in)) {
jbe@107 850 luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");
jbe@107 851 }
jbe@107 852 addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107 853 if (!addrstr) {
jbe@107 854 moonbr_io_errmsg();
jbe@107 855 luaL_error(L, "Could not format remote IP address: %s", errmsg);
jbe@107 856 } else {
jbe@107 857 lua_pushstring(L, addrstr);
jbe@107 858 lua_setfield(L, -2, "remote_ip4");
jbe@107 859 }
jbe@107 860 lua_pushinteger(L, ntohs(addr_in.sin_port));
jbe@107 861 lua_setfield(L, -2, "remote_tcpport");
jbe@107 862 }
jbe@79 863 luaL_getmetatable(L, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 864 lua_setmetatable(L, -2);
jbe@79 865 lua_setfield(L, -2, "public");
jbe@79 866 lua_setuservalue(L, -2);
jbe@79 867 }
jbe@79 868
jbe@79 869 static int moonbr_io_handleindex(lua_State *L) {
jbe@80 870 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@205 871 luaL_checkany(L, 2);
jbe@79 872 lua_getuservalue(L, 1);
jbe@79 873 lua_getfield(L, -1, "public");
jbe@79 874 lua_pushvalue(L, 2);
jbe@79 875 lua_gettable(L, -2);
jbe@79 876 return 1;
jbe@79 877 }
jbe@79 878
jbe@79 879 static int moonbr_io_handlenewindex(lua_State *L) {
jbe@80 880 luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@205 881 luaL_checkany(L, 2);
jbe@205 882 luaL_checkany(L, 3);
jbe@79 883 lua_getuservalue(L, 1);
jbe@79 884 lua_getfield(L, -1, "public");
jbe@79 885 lua_pushvalue(L, 2);
jbe@79 886 lua_pushvalue(L, 3);
jbe@79 887 lua_settable(L, -3);
jbe@79 888 return 0;
jbe@79 889 }
jbe@79 890
jbe@111 891 static int moonbr_io_localconnect_impl(lua_State *L, int nonblocking) {
jbe@111 892 const char *path;
jbe@111 893 struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };
jbe@111 894 const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@111 895 (void *)sockaddr.sun_path - (void *)&sockaddr
jbe@111 896 ) - 1; /* one byte for termination */
jbe@111 897 int sock;
jbe@111 898 path = luaL_checkstring(L, 1);
jbe@111 899 if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);
jbe@111 900 strcpy(sockaddr.sun_path, path);
jbe@111 901 sock = socket(
jbe@111 902 PF_LOCAL,
jbe@111 903 SOCK_STREAM | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@111 904 0
jbe@111 905 );
jbe@111 906 if (sock < 0) {
jbe@111 907 moonbr_io_errmsg();
jbe@111 908 lua_pushnil(L);
jbe@111 909 lua_pushstring(L, errmsg);
jbe@111 910 return 2;
jbe@111 911 }
jbe@111 912 if (connect(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
jbe@111 913 if (!nonblocking && errno == EINTR) {
jbe@111 914 moonbr_io_errmsg();
jbe@111 915 close(sock);
jbe@111 916 lua_pushnil(L);
jbe@111 917 lua_pushstring(L, errmsg);
jbe@111 918 return 2;
jbe@111 919 } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@111 920 moonbr_io_errmsg();
jbe@111 921 lua_pushnil(L);
jbe@111 922 lua_pushstring(L, errmsg);
jbe@111 923 return 2;
jbe@111 924 }
jbe@111 925 }
jbe@111 926 moonbr_io_pushhandle(L, sock);
jbe@111 927 return 1;
jbe@111 928 }
jbe@111 929
jbe@111 930 static int moonbr_io_localconnect(lua_State *L) {
jbe@111 931 return moonbr_io_localconnect_impl(L, 0);
jbe@111 932 }
jbe@111 933
jbe@111 934 static int moonbr_io_localconnect_nb(lua_State *L) {
jbe@111 935 return moonbr_io_localconnect_impl(L, 1);
jbe@111 936 }
jbe@111 937
jbe@99 938 static int moonbr_io_tcpconnect_impl(lua_State *L, int nonblocking) {
jbe@98 939 const char *host, *port;
jbe@98 940 struct addrinfo hints = { 0, };
jbe@98 941 struct addrinfo *res, *addrinfo;
jbe@98 942 int errcode;
jbe@98 943 int sock;
jbe@98 944 host = luaL_checkstring(L, 1);
jbe@98 945 port = luaL_checkstring(L, 2);
jbe@98 946 hints.ai_family = AF_UNSPEC;
jbe@98 947 hints.ai_socktype = SOCK_STREAM;
jbe@98 948 hints.ai_protocol = IPPROTO_TCP;
jbe@98 949 hints.ai_flags = AI_ADDRCONFIG;
jbe@98 950 errcode = getaddrinfo(host, port, &hints, &res);
jbe@98 951 if (errcode) {
jbe@102 952 freeaddrinfo(res);
jbe@98 953 if (errcode == EAI_SYSTEM) {
jbe@98 954 moonbr_io_errmsg();
jbe@98 955 lua_pushnil(L);
jbe@98 956 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@98 957 } else {
jbe@98 958 lua_pushnil(L);
jbe@98 959 lua_pushstring(L, gai_strerror(errcode));
jbe@98 960 }
jbe@98 961 return 2;
jbe@98 962 }
jbe@98 963 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 964 if (addrinfo->ai_family == AF_INET6) goto moonbr_io_tcpconnect_found;
jbe@98 965 }
jbe@98 966 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 967 if (addrinfo->ai_family == AF_INET) goto moonbr_io_tcpconnect_found;
jbe@98 968 }
jbe@98 969 addrinfo = res;
jbe@98 970 moonbr_io_tcpconnect_found:
jbe@99 971 sock = socket(
jbe@134 972 addrinfo->ai_family, /* NOTE: not correctly using PF_* but AF_* constants here */
jbe@99 973 addrinfo->ai_socktype | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@99 974 addrinfo->ai_protocol
jbe@99 975 );
jbe@98 976 if (sock < 0) {
jbe@98 977 moonbr_io_errmsg();
jbe@108 978 freeaddrinfo(res);
jbe@98 979 lua_pushnil(L);
jbe@98 980 lua_pushstring(L, errmsg);
jbe@108 981 return 2;
jbe@98 982 }
jbe@98 983 if (connect(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@108 984 freeaddrinfo(res);
jbe@99 985 if (!nonblocking && errno == EINTR) {
jbe@99 986 moonbr_io_errmsg();
jbe@99 987 close(sock);
jbe@99 988 lua_pushnil(L);
jbe@99 989 lua_pushstring(L, errmsg);
jbe@99 990 return 2;
jbe@99 991 } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@99 992 moonbr_io_errmsg();
jbe@99 993 lua_pushnil(L);
jbe@99 994 lua_pushstring(L, errmsg);
jbe@99 995 return 2;
jbe@99 996 }
jbe@108 997 } else {
jbe@108 998 freeaddrinfo(res);
jbe@98 999 }
jbe@107 1000 moonbr_io_pushhandle(L, sock);
jbe@98 1001 return 1;
jbe@98 1002 }
jbe@98 1003
jbe@99 1004 static int moonbr_io_tcpconnect(lua_State *L) {
jbe@99 1005 return moonbr_io_tcpconnect_impl(L, 0);
jbe@99 1006 }
jbe@99 1007
jbe@99 1008 static int moonbr_io_tcpconnect_nb(lua_State *L) {
jbe@99 1009 return moonbr_io_tcpconnect_impl(L, 1);
jbe@99 1010 }
jbe@99 1011
jbe@112 1012 static int moonbr_io_locallisten(lua_State *L) {
jbe@112 1013 moonbr_io_listener_t *listener;
jbe@112 1014 const char *path;
jbe@118 1015 struct stat sb;
jbe@112 1016 struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };
jbe@112 1017 const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@112 1018 (void *)sockaddr.sun_path - (void *)&sockaddr
jbe@112 1019 ) - 1; /* one byte for termination */
jbe@112 1020 int sock;
jbe@112 1021 path = luaL_checkstring(L, 1);
jbe@112 1022 if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);
jbe@112 1023 strcpy(sockaddr.sun_path, path);
jbe@118 1024 if (stat(path, &sb) == 0) {
jbe@118 1025 if (S_ISSOCK(sb.st_mode)) unlink(path);
jbe@118 1026 }
jbe@112 1027 listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));
jbe@117 1028 listener->fd = -1;
jbe@112 1029 luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@112 1030 sock = socket(
jbe@112 1031 PF_LOCAL,
jbe@112 1032 SOCK_STREAM | SOCK_CLOEXEC,
jbe@112 1033 0
jbe@112 1034 );
jbe@112 1035 if (sock < 0) {
jbe@112 1036 moonbr_io_errmsg();
jbe@112 1037 lua_pushnil(L);
jbe@112 1038 lua_pushstring(L, errmsg);
jbe@112 1039 return 2;
jbe@112 1040 }
jbe@112 1041 if (bind(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
jbe@112 1042 moonbr_io_errmsg();
jbe@112 1043 close(sock);
jbe@112 1044 lua_pushnil(L);
jbe@112 1045 lua_pushstring(L, errmsg);
jbe@112 1046 return 2;
jbe@112 1047 }
jbe@112 1048 if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {
jbe@112 1049 moonbr_io_errmsg();
jbe@112 1050 close(sock);
jbe@112 1051 lua_pushnil(L);
jbe@112 1052 lua_pushstring(L, errmsg);
jbe@112 1053 return 2;
jbe@112 1054 }
jbe@112 1055 listener->fd = sock;
jbe@118 1056 listener->addrfam = AF_LOCAL;
jbe@112 1057 listener->nonblocking = -1;
jbe@112 1058 return 1;
jbe@112 1059 }
jbe@112 1060
jbe@108 1061 static int moonbr_io_tcplisten(lua_State *L) {
jbe@108 1062 moonbr_io_listener_t *listener;
jbe@108 1063 const char *host, *port;
jbe@108 1064 struct addrinfo hints = { 0, };
jbe@108 1065 struct addrinfo *res, *addrinfo;
jbe@108 1066 int errcode;
jbe@108 1067 int sock;
jbe@108 1068 host = luaL_optstring(L, 1, NULL);
jbe@108 1069 port = luaL_checkstring(L, 2);
jbe@108 1070 listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));
jbe@117 1071 listener->fd = -1;
jbe@108 1072 luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1073 hints.ai_family = AF_UNSPEC;
jbe@108 1074 hints.ai_socktype = SOCK_STREAM;
jbe@108 1075 hints.ai_protocol = IPPROTO_TCP;
jbe@108 1076 hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE;
jbe@108 1077 errcode = getaddrinfo(host, port, &hints, &res);
jbe@108 1078 if (errcode) {
jbe@108 1079 freeaddrinfo(res);
jbe@108 1080 if (errcode == EAI_SYSTEM) {
jbe@108 1081 moonbr_io_errmsg();
jbe@108 1082 lua_pushnil(L);
jbe@108 1083 lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@108 1084 } else {
jbe@108 1085 lua_pushnil(L);
jbe@108 1086 lua_pushstring(L, gai_strerror(errcode));
jbe@108 1087 }
jbe@108 1088 return 2;
jbe@108 1089 }
jbe@108 1090 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 1091 if (addrinfo->ai_family == AF_INET6) goto moonbr_io_tcpconnect_found;
jbe@108 1092 }
jbe@108 1093 for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134 1094 if (addrinfo->ai_family == AF_INET) goto moonbr_io_tcpconnect_found;
jbe@108 1095 }
jbe@108 1096 addrinfo = res;
jbe@108 1097 moonbr_io_tcpconnect_found:
jbe@118 1098 listener->addrfam = addrinfo->ai_family;
jbe@108 1099 sock = socket(
jbe@134 1100 addrinfo->ai_family, /* NOTE: not correctly using PF_* but AF_* constants here */
jbe@108 1101 addrinfo->ai_socktype | SOCK_CLOEXEC,
jbe@108 1102 addrinfo->ai_protocol
jbe@108 1103 );
jbe@108 1104 if (sock < 0) {
jbe@108 1105 moonbr_io_errmsg();
jbe@108 1106 freeaddrinfo(res);
jbe@108 1107 lua_pushnil(L);
jbe@108 1108 lua_pushstring(L, errmsg);
jbe@108 1109 return 2;
jbe@108 1110 }
jbe@120 1111 {
jbe@120 1112 static const int reuseval = 1;
jbe@120 1113 if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &reuseval, sizeof(reuseval))) {
jbe@120 1114 moonbr_io_errmsg();
jbe@120 1115 freeaddrinfo(res);
jbe@120 1116 close(sock);
jbe@120 1117 lua_pushnil(L);
jbe@120 1118 lua_pushfstring(L, "Error while setting SO_REUSEADDR with setsockopt: %s", errmsg);
jbe@120 1119 return 2;
jbe@120 1120 }
jbe@120 1121 }
jbe@108 1122 if (bind(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@108 1123 moonbr_io_errmsg();
jbe@108 1124 freeaddrinfo(res);
jbe@108 1125 close(sock);
jbe@108 1126 lua_pushnil(L);
jbe@108 1127 lua_pushstring(L, errmsg);
jbe@108 1128 return 2;
jbe@108 1129 }
jbe@108 1130 freeaddrinfo(res);
jbe@108 1131 if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {
jbe@108 1132 moonbr_io_errmsg();
jbe@108 1133 close(sock);
jbe@108 1134 lua_pushnil(L);
jbe@108 1135 lua_pushstring(L, errmsg);
jbe@108 1136 return 2;
jbe@108 1137 }
jbe@108 1138 listener->fd = sock;
jbe@108 1139 listener->nonblocking = -1;
jbe@108 1140 return 1;
jbe@108 1141 }
jbe@108 1142
jbe@108 1143 static int moonbr_io_accept_impl(lua_State *L, int nonblocking) {
jbe@108 1144 moonbr_io_listener_t *listener;
jbe@108 1145 int fd;
jbe@108 1146 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1147 if (listener->fd < 0) luaL_error(L, "Attempt to use a closed listener");
jbe@108 1148 if (listener->nonblocking != nonblocking) {
jbe@108 1149 int flags;
jbe@108 1150 flags = fcntl(listener->fd, F_GETFL, 0);
jbe@108 1151 if (flags == -1) {
jbe@108 1152 moonbr_io_errmsg();
jbe@108 1153 close(listener->fd);
jbe@108 1154 listener->fd = -1;
jbe@108 1155 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@108 1156 }
jbe@108 1157 if (nonblocking) flags |= O_NONBLOCK;
jbe@108 1158 else flags &= ~O_NONBLOCK;
jbe@108 1159 if (fcntl(listener->fd, F_SETFL, flags) == -1) {
jbe@108 1160 moonbr_io_errmsg();
jbe@108 1161 close(listener->fd);
jbe@108 1162 listener->fd = -1;
jbe@108 1163 luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@108 1164 }
jbe@108 1165 listener->nonblocking = nonblocking;
jbe@108 1166 }
jbe@108 1167 while (1) {
jbe@108 1168 fd = accept4(listener->fd, NULL, NULL, SOCK_CLOEXEC);
jbe@108 1169 if (fd < 0) {
jbe@108 1170 if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@108 1171 lua_pushboolean(L, 0);
jbe@108 1172 lua_pushliteral(L, "No incoming connection pending");
jbe@108 1173 return 2;
jbe@108 1174 } else if (errno != EINTR) {
jbe@108 1175 moonbr_io_errmsg();
jbe@108 1176 lua_pushnil(L);
jbe@108 1177 lua_pushstring(L, errmsg);
jbe@108 1178 return 2;
jbe@108 1179 }
jbe@108 1180 } else {
jbe@108 1181 moonbr_io_pushhandle(L, fd);
jbe@108 1182 return 1;
jbe@108 1183 }
jbe@108 1184 }
jbe@108 1185 }
jbe@108 1186
jbe@108 1187 static int moonbr_io_accept(lua_State *L) {
jbe@108 1188 return moonbr_io_accept_impl(L, 0);
jbe@108 1189 }
jbe@108 1190
jbe@108 1191 static int moonbr_io_accept_nb(lua_State *L) {
jbe@108 1192 return moonbr_io_accept_impl(L, 1);
jbe@108 1193 }
jbe@108 1194
jbe@108 1195 static int moonbr_io_unlisten(lua_State *L) {
jbe@108 1196 moonbr_io_listener_t *listener;
jbe@118 1197 struct sockaddr_un addr;
jbe@118 1198 socklen_t addrlen;
jbe@118 1199 struct stat sb;
jbe@108 1200 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1201 if (listener->fd < 0) luaL_error(L, "Attempt to close a closed listener");
jbe@118 1202 addrlen = sizeof(addr);
jbe@118 1203 if (getsockname(listener->fd, (struct sockaddr *)&addr, &addrlen)) addrlen = 0;
jbe@108 1204 if (close(listener->fd)) {
jbe@108 1205 moonbr_io_errmsg();
jbe@108 1206 listener->fd = -1;
jbe@118 1207 if (addrlen && addrlen <= sizeof(addr)) {
jbe@118 1208 if (stat(addr.sun_path, &sb) == 0) {
jbe@118 1209 if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);
jbe@118 1210 }
jbe@118 1211 }
jbe@108 1212 lua_pushnil(L);
jbe@108 1213 lua_pushstring(L, errmsg);
jbe@108 1214 return 2;
jbe@108 1215 }
jbe@108 1216 listener->fd = -1;
jbe@118 1217 if (addrlen && addrlen <= sizeof(addr)) {
jbe@118 1218 if (stat(addr.sun_path, &sb) == 0) {
jbe@118 1219 if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);
jbe@118 1220 }
jbe@118 1221 }
jbe@108 1222 lua_pushboolean(L, 1);
jbe@108 1223 return 1;
jbe@108 1224 }
jbe@108 1225
jbe@108 1226 static int moonbr_io_listenergc(lua_State *L) {
jbe@108 1227 moonbr_io_listener_t *listener;
jbe@108 1228 listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@117 1229 if (listener->fd >= 0) close(listener->fd);
jbe@108 1230 listener->fd = -1;
jbe@108 1231 return 0;
jbe@108 1232 }
jbe@108 1233
jbe@205 1234 static int moonbr_io_exec(lua_State *L) {
jbe@205 1235 char **argv;
jbe@205 1236 int i, argc;
jbe@205 1237 int sockin[2], sockout[2], sockerr[2];
jbe@205 1238 volatile int errorcond = 0;
jbe@205 1239 volatile char errmsgbuf[MOONBR_IO_MAXSTRERRORLEN];
jbe@205 1240 moonbr_io_child_t *child;
jbe@205 1241 argc = lua_gettop(L);
jbe@205 1242 argv = lua_newuserdata(L, (argc + 1) * sizeof(char *));
jbe@205 1243 for (i=0; i<argc; i++) argv[i] = (char *)luaL_checkstring(L, i+1);
jbe@205 1244 argv[argc] = NULL;
jbe@206 1245 if (socketpair(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0, sockin)) {
jbe@205 1246 moonbr_io_errmsg();
jbe@205 1247 lua_pushnil(L);
jbe@205 1248 lua_pushfstring(L, "Could not create socket pair: %s", errmsg);
jbe@205 1249 return 2;
jbe@205 1250 }
jbe@206 1251 if (socketpair(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0, sockout)) {
jbe@205 1252 moonbr_io_errmsg();
jbe@205 1253 close(sockin[0]);
jbe@205 1254 close(sockin[1]);
jbe@205 1255 lua_pushnil(L);
jbe@205 1256 lua_pushfstring(L, "Could not create socket pair: %s", errmsg);
jbe@205 1257 return 2;
jbe@205 1258 }
jbe@206 1259 if (socketpair(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0, sockerr)) {
jbe@205 1260 moonbr_io_errmsg();
jbe@205 1261 close(sockin[0]);
jbe@205 1262 close(sockin[1]);
jbe@205 1263 close(sockout[0]);
jbe@205 1264 close(sockout[1]);
jbe@205 1265 lua_pushnil(L);
jbe@205 1266 lua_pushfstring(L, "Could not create socket pair: %s", errmsg);
jbe@205 1267 return 2;
jbe@205 1268 }
jbe@205 1269 child = lua_newuserdata(L, sizeof(moonbr_io_child_t));
jbe@205 1270 child->pid = vfork();
jbe@205 1271 if (child->pid == -1) {
jbe@205 1272 moonbr_io_errmsg();
jbe@205 1273 close(sockin[0]);
jbe@205 1274 close(sockin[1]);
jbe@205 1275 close(sockout[0]);
jbe@205 1276 close(sockout[1]);
jbe@205 1277 close(sockerr[0]);
jbe@205 1278 close(sockerr[1]);
jbe@205 1279 lua_pushnil(L);
jbe@205 1280 lua_pushfstring(L, "Could not fork: %s", errmsg);
jbe@205 1281 return 2;
jbe@205 1282 }
jbe@205 1283 if (!child->pid) {
jbe@206 1284 if (dup2(sockin[1], 0) == -1) goto moonbr_io_exec_error;
jbe@206 1285 if (dup2(sockout[1], 1) == -1) goto moonbr_io_exec_error;
jbe@206 1286 if (dup2(sockerr[1], 2) == -1) goto moonbr_io_exec_error;
jbe@205 1287 closefrom(4);
jbe@206 1288 if (fcntl(0, F_SETFD, 0) == -1) goto moonbr_io_exec_error;
jbe@206 1289 if (fcntl(1, F_SETFD, 0) == -1) goto moonbr_io_exec_error;
jbe@206 1290 if (fcntl(2, F_SETFD, 0) == -1) goto moonbr_io_exec_error;
jbe@205 1291 if (execvp(argv[0], argv)) {
jbe@205 1292 errorcond = 2;
jbe@205 1293 strerror_r(errno, (char *)errmsgbuf, MOONBR_IO_MAXSTRERRORLEN);
jbe@205 1294 _exit(0);
jbe@205 1295 }
jbe@206 1296 moonbr_io_exec_error:
jbe@206 1297 errorcond = 1;
jbe@206 1298 strerror_r(errno, (char *)errmsgbuf, MOONBR_IO_MAXSTRERRORLEN);
jbe@206 1299 _exit(0);
jbe@205 1300 }
jbe@205 1301 close(sockin[1]);
jbe@205 1302 close(sockout[1]);
jbe@205 1303 close(sockerr[1]);
jbe@205 1304 if (errorcond) {
jbe@205 1305 int status;
jbe@205 1306 close(sockin[0]);
jbe@205 1307 close(sockout[0]);
jbe@205 1308 close(sockerr[0]);
jbe@205 1309 while (waitpid(child->pid, &status, 0) == -1) {
jbe@205 1310 if (errno != EINTR) {
jbe@205 1311 moonbr_io_errmsg();
jbe@205 1312 luaL_error(L, "Error in waitpid call after unsuccessful exec: %s", errmsg);
jbe@205 1313 }
jbe@205 1314 }
jbe@205 1315 lua_pushnil(L);
jbe@205 1316 if (errorcond == 2) lua_pushfstring(L, "Could not execute: %s", errmsgbuf);
jbe@205 1317 else lua_pushfstring(L, "Error in fork: %s", errmsgbuf);
jbe@205 1318 return 2;
jbe@205 1319 }
jbe@205 1320 /* close sockets during garbage collection in case a Lua error is raised */
jbe@205 1321 child->uninitialized_in = sockin[0];
jbe@205 1322 child->uninitialized_out = sockout[0];
jbe@205 1323 child->uninitialized_err = sockerr[0];
jbe@205 1324 lua_newtable(L);
jbe@205 1325 lua_setuservalue(L, -2);
jbe@205 1326 luaL_getmetatable(L, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205 1327 lua_setmetatable(L, -2);
jbe@205 1328 moonbr_io_pushhandle(L, sockin[0]);
jbe@205 1329 lua_setfield(L, -2, "stdin");
jbe@205 1330 child->uninitialized_in = -1;
jbe@205 1331 moonbr_io_pushhandle(L, sockout[0]);
jbe@205 1332 lua_setfield(L, -2, "stdout");
jbe@205 1333 child->uninitialized_out = -1;
jbe@205 1334 moonbr_io_pushhandle(L, sockerr[0]);
jbe@205 1335 lua_setfield(L, -2, "stderr");
jbe@205 1336 child->uninitialized_err = -1;
jbe@205 1337 return 1;
jbe@205 1338 }
jbe@205 1339
jbe@205 1340 static int moonbr_io_childindex(lua_State *L) {
jbe@205 1341 luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205 1342 luaL_checkany(L, 2);
jbe@205 1343 lua_getuservalue(L, 1);
jbe@205 1344 lua_pushvalue(L, 2);
jbe@205 1345 lua_gettable(L, -2);
jbe@205 1346 if (lua_isnil(L, -1)) {
jbe@205 1347 luaL_getmetatable(L, MOONBR_IO_CHILD_PT_REGKEY);
jbe@205 1348 lua_pushvalue(L, 2);
jbe@205 1349 lua_gettable(L, -2);
jbe@205 1350 }
jbe@205 1351 return 1;
jbe@205 1352 }
jbe@205 1353
jbe@205 1354 static int moonbr_io_childnewindex(lua_State *L) {
jbe@205 1355 luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205 1356 luaL_checkany(L, 2);
jbe@205 1357 luaL_checkany(L, 3);
jbe@205 1358 lua_getuservalue(L, 1);
jbe@205 1359 lua_pushvalue(L, 2);
jbe@205 1360 lua_pushvalue(L, 3);
jbe@205 1361 lua_settable(L, -3);
jbe@205 1362 return 0;
jbe@205 1363 }
jbe@205 1364
jbe@205 1365 static int moonbr_io_childgc(lua_State *L) {
jbe@205 1366 moonbr_io_child_t *child;
jbe@205 1367 child = luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205 1368 if (child->pid) {
jbe@205 1369 int status;
jbe@205 1370 if (kill(child->pid, SIGKILL)) {
jbe@205 1371 moonbr_io_errmsg();
jbe@205 1372 luaL_error(L, "Error in kill call during garbage collection: %s", errmsg);
jbe@205 1373 }
jbe@205 1374 while (waitpid(child->pid, &status, 0) == -1) {
jbe@205 1375 if (errno != EINTR) {
jbe@205 1376 moonbr_io_errmsg();
jbe@205 1377 luaL_error(L, "Error in waitpid call during garbage collection: %s", errmsg);
jbe@205 1378 }
jbe@205 1379 }
jbe@205 1380 }
jbe@205 1381 if (child->uninitialized_in != -1) close(child->uninitialized_in);
jbe@205 1382 if (child->uninitialized_out != -1) close(child->uninitialized_out);
jbe@205 1383 if (child->uninitialized_err != -1) close(child->uninitialized_err);
jbe@205 1384 return 0;
jbe@205 1385 }
jbe@205 1386
jbe@205 1387 static int moonbr_io_kill(lua_State *L) {
jbe@205 1388 moonbr_io_child_t *child;
jbe@205 1389 int sig;
jbe@205 1390 child = luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205 1391 sig = luaL_optinteger(L, 2, SIGTERM);
jbe@205 1392 if (!child->pid) luaL_error(L, "Attempt to kill an already collected child process");
jbe@205 1393 if (kill(child->pid, sig)) {
jbe@205 1394 moonbr_io_errmsg();
jbe@205 1395 luaL_error(L, "Error in kill call: %s", errmsg);
jbe@205 1396 }
jbe@205 1397 lua_settop(L, 1);
jbe@205 1398 return 1;
jbe@205 1399 }
jbe@205 1400
jbe@205 1401 static int moonbr_io_wait_impl(lua_State *L, int nonblocking) {
jbe@205 1402 moonbr_io_child_t *child;
jbe@205 1403 pid_t waitedpid;
jbe@205 1404 int status;
jbe@205 1405 child = luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205 1406 if (!child->pid) luaL_error(L, "Attempt to wait for an already collected child process");
jbe@205 1407 while ((waitedpid = waitpid(child->pid, &status, nonblocking ? WNOHANG : 0)) == -1) {
jbe@205 1408 if (errno != EINTR) {
jbe@205 1409 moonbr_io_errmsg();
jbe@205 1410 luaL_error(L, "Error in waitpid call: %s", errmsg);
jbe@205 1411 }
jbe@205 1412 }
jbe@205 1413 if (!waitedpid) {
jbe@205 1414 lua_pushnil(L);
jbe@205 1415 } else {
jbe@205 1416 child->pid = 0;
jbe@205 1417 if (WIFEXITED(status)) {
jbe@205 1418 lua_pushinteger(L, WEXITSTATUS(status));
jbe@205 1419 } else if (WIFSIGNALED(status)) {
jbe@205 1420 lua_pushinteger(L, -WTERMSIG(status));
jbe@205 1421 } else {
jbe@205 1422 luaL_error(L, "Unexpected status value returned by waitpid call");
jbe@205 1423 }
jbe@205 1424 }
jbe@205 1425 return 1;
jbe@205 1426 }
jbe@205 1427
jbe@205 1428 static int moonbr_io_wait(lua_State *L) {
jbe@205 1429 return moonbr_io_wait_impl(L, 0);
jbe@205 1430 }
jbe@205 1431
jbe@205 1432 static int moonbr_io_wait_nb(lua_State *L) {
jbe@205 1433 return moonbr_io_wait_impl(L, 1);
jbe@205 1434 }
jbe@205 1435
jbe@205 1436 #if LUA_VERSION_NUM >= 503
jbe@205 1437 static int moonbr_io_wait_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@205 1438 #else
jbe@205 1439 static int moonbr_io_wait_cont(lua_State *L) {
jbe@205 1440 #endif
jbe@205 1441 #if !(LUA_VERSION_NUM >= 503)
jbe@205 1442 int ctx = 0;
jbe@205 1443 lua_getctx(L, &ctx);
jbe@205 1444 #endif
jbe@205 1445 while (1) {
jbe@205 1446 lua_pushcfunction(L, moonbr_io_wait_nb);
jbe@205 1447 lua_pushvalue(L, 1);
jbe@205 1448 lua_call(L, 1, 1);
jbe@205 1449 if (!lua_isnil(L, -1)) break;
jbe@205 1450 lua_pushvalue(L, 2);
jbe@205 1451 lua_callk(L, 0, 0, ctx, moonbr_io_wait_cont);
jbe@205 1452 }
jbe@205 1453 return 1;
jbe@205 1454 }
jbe@205 1455
jbe@205 1456 static int moonbr_io_wait_call(lua_State *L) {
jbe@205 1457 lua_settop(L, 2);
jbe@205 1458 #if LUA_VERSION_NUM >= 503
jbe@205 1459 return moonbr_io_wait_cont(L, 0, 0);
jbe@205 1460 #else
jbe@205 1461 return moonbr_io_wait_cont(L);
jbe@205 1462 #endif
jbe@205 1463 }
jbe@205 1464
jbe@205 1465 moonbr_io_yield_wrapper(moonbr_io_wait_yield, moonbr_io_wait_call);
jbe@205 1466
jbe@106 1467 static int moonbr_io_poll(lua_State *L) {
jbe@106 1468 moonbr_io_handle_t *handle;
jbe@108 1469 moonbr_io_listener_t *listener;
jbe@106 1470 int fd, isnum;
jbe@106 1471 int nfds = 0;
jbe@106 1472 fd_set readfds, writefds, exceptfds;
jbe@106 1473 struct timeval timeout = {0, };
jbe@106 1474 int status;
jbe@106 1475 FD_ZERO(&readfds);
jbe@106 1476 FD_ZERO(&writefds);
jbe@106 1477 FD_ZERO(&exceptfds);
jbe@106 1478 if (!lua_isnoneornil(L, 1)) {
jbe@106 1479 luaL_checktype(L, 1, LUA_TTABLE);
jbe@106 1480 for (lua_pushnil(L); lua_next(L, 1); lua_pop(L, 1)) {
jbe@106 1481 if (lua_toboolean(L, -1)) {
jbe@106 1482 handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@106 1483 if (handle) {
jbe@109 1484 if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");
jbe@106 1485 fd = handle->fd;
jbe@122 1486 if (
jbe@122 1487 fd < 0 || /* fake EOF to simulate shutdown if fd < 0 */
jbe@122 1488 handle->readbufin != handle->readbufout /* data pending in buffer */
jbe@122 1489 ) {
jbe@109 1490 lua_pushboolean(L, 1);
jbe@109 1491 return 1;
jbe@109 1492 }
jbe@106 1493 } else {
jbe@108 1494 listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1495 if (listener) {
jbe@108 1496 fd = listener->fd;
jbe@108 1497 if (fd < 0) luaL_error(L, "Attempt to poll a closed listener");
jbe@108 1498 } else {
jbe@108 1499 fd = lua_tointegerx(L, -2, &isnum);
jbe@108 1500 if (!isnum) luaL_error(L, "Expected integer (file descriptor), I/O handle, or listener in table key");
jbe@108 1501 }
jbe@106 1502 }
jbe@138 1503 if (fd < 0 || fd >= FD_SETSIZE) luaL_error(L, "File descriptor out of valid range");
jbe@106 1504 FD_SET(fd, &readfds);
jbe@106 1505 if (fd+1 > nfds) nfds = fd+1;
jbe@106 1506 }
jbe@106 1507 }
jbe@106 1508 }
jbe@106 1509 if (!lua_isnoneornil(L, 2)) {
jbe@106 1510 luaL_checktype(L, 2, LUA_TTABLE);
jbe@106 1511 for (lua_pushnil(L); lua_next(L, 2); lua_pop(L, 1)) {
jbe@106 1512 if (lua_toboolean(L, -1)) {
jbe@106 1513 handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@106 1514 if (handle) {
jbe@109 1515 if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");
jbe@109 1516 if (handle->finished) luaL_error(L, "Attempt to write-poll a finished connection");
jbe@106 1517 fd = handle->fd;
jbe@106 1518 } else {
jbe@108 1519 listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@109 1520 if (listener) luaL_error(L, "Attempt to write-poll a listener");
jbe@109 1521 fd = lua_tointegerx(L, -2, &isnum);
jbe@109 1522 if (!isnum) luaL_error(L, "Expected integer (file descriptor) or I/O handle in table key");
jbe@106 1523 }
jbe@138 1524 if (fd < 0 || fd >= FD_SETSIZE) luaL_error(L, "File descriptor out of valid range");
jbe@106 1525 FD_SET(fd, &writefds);
jbe@106 1526 if (fd+1 > nfds) nfds = fd+1;
jbe@106 1527 }
jbe@106 1528 }
jbe@106 1529 }
jbe@106 1530 if (!lua_isnoneornil(L, 3)) {
jbe@106 1531 lua_Number n;
jbe@106 1532 n = lua_tonumberx(L, 3, &isnum);
jbe@146 1533 if (isnum && n<0) {
jbe@146 1534 lua_pushboolean(L, 0);
jbe@146 1535 lua_pushliteral(L, "Negative timeout");
jbe@146 1536 return 2;
jbe@146 1537 } else if (isnum && n>=0 && n<100000000) {
jbe@106 1538 timeout.tv_sec = n;
jbe@106 1539 timeout.tv_usec = 1e6 * (n - timeout.tv_sec);
jbe@106 1540 } else {
jbe@106 1541 luaL_argcheck(L, 0, 3, "not a valid timeout");
jbe@106 1542 }
jbe@106 1543 status = select(nfds, &readfds, &writefds, &exceptfds, &timeout);
jbe@106 1544 } else {
jbe@106 1545 status = select(nfds, &readfds, &writefds, &exceptfds, NULL);
jbe@106 1546 }
jbe@106 1547 if (status == -1) {
jbe@106 1548 if (errno == EINTR) {
jbe@146 1549 lua_pushnil(L);
jbe@106 1550 lua_pushliteral(L, "Signal received while polling file descriptors");
jbe@106 1551 return 2;
jbe@106 1552 } else {
jbe@106 1553 moonbr_io_errmsg();
jbe@106 1554 return luaL_error(L, "Unexpected error during \"select\" system call: %s", errmsg);
jbe@106 1555 }
jbe@106 1556 } else if (status == 0) {
jbe@106 1557 lua_pushboolean(L, 0);
jbe@106 1558 lua_pushliteral(L, "Timeout while polling file descriptors");
jbe@106 1559 return 2;
jbe@106 1560 } else {
jbe@106 1561 lua_pushboolean(L, 1);
jbe@106 1562 return 1;
jbe@106 1563 }
jbe@106 1564 }
jbe@106 1565
jbe@115 1566 static int moonbr_io_timeref(lua_State *L) {
jbe@115 1567 lua_Number sub;
jbe@115 1568 struct timespec tp;
jbe@115 1569 sub = luaL_optnumber(L, 1, 0);
jbe@115 1570 if (clock_gettime(CLOCK_MONOTONIC, &tp)) {
jbe@115 1571 return luaL_error(L, "Could not access CLOCK_MONOTONIC");
jbe@115 1572 }
jbe@115 1573 lua_pushnumber(L, tp.tv_sec + tp.tv_nsec / 1.0e9 - sub);
jbe@115 1574 return 1;
jbe@115 1575 }
jbe@115 1576
jbe@79 1577 static const struct luaL_Reg moonbr_io_handle_methods[] = {
jbe@85 1578 {"read", moonbr_io_read},
jbe@85 1579 {"read_nb", moonbr_io_read_nb},
jbe@140 1580 {"read_call", moonbr_io_read_call},
jbe@140 1581 {"read_yield", moonbr_io_read_yield},
jbe@86 1582 {"drain", moonbr_io_drain},
jbe@86 1583 {"drain_nb", moonbr_io_drain_nb},
jbe@144 1584 {"drain_call", moonbr_io_drain_call},
jbe@144 1585 {"drain_yield", moonbr_io_drain_yield},
jbe@80 1586 {"write", moonbr_io_write},
jbe@81 1587 {"write_nb", moonbr_io_write_nb},
jbe@145 1588 {"write_call", moonbr_io_write_call},
jbe@145 1589 {"write_yield", moonbr_io_write_yield},
jbe@80 1590 {"flush", moonbr_io_flush},
jbe@81 1591 {"flush_nb", moonbr_io_flush_nb},
jbe@145 1592 {"flush_call", moonbr_io_flush_call},
jbe@145 1593 {"flush_yield", moonbr_io_flush_yield},
jbe@88 1594 {"finish", moonbr_io_finish},
jbe@87 1595 {"close", moonbr_io_close},
jbe@85 1596 {"reset", moonbr_io_reset},
jbe@79 1597 {NULL, NULL}
jbe@79 1598 };
jbe@79 1599
jbe@79 1600 static const struct luaL_Reg moonbr_io_handle_metamethods[] = {
jbe@79 1601 {"__index", moonbr_io_handleindex},
jbe@79 1602 {"__newindex", moonbr_io_handlenewindex},
jbe@108 1603 {"__gc", moonbr_io_handlegc},
jbe@108 1604 {NULL, NULL}
jbe@108 1605 };
jbe@108 1606
jbe@108 1607 static const struct luaL_Reg moonbr_io_listener_methods[] = {
jbe@108 1608 {"accept", moonbr_io_accept},
jbe@108 1609 {"accept_nb", moonbr_io_accept_nb},
jbe@108 1610 {"close", moonbr_io_unlisten},
jbe@108 1611 {NULL, NULL}
jbe@108 1612 };
jbe@108 1613
jbe@108 1614 static const struct luaL_Reg moonbr_io_listener_metamethods[] = {
jbe@108 1615 {"__gc", moonbr_io_listenergc},
jbe@79 1616 {NULL, NULL}
jbe@79 1617 };
jbe@79 1618
jbe@205 1619 static const struct luaL_Reg moonbr_io_child_methods[] = {
jbe@205 1620 {"kill", moonbr_io_kill},
jbe@205 1621 {"wait", moonbr_io_wait},
jbe@205 1622 {"wait_nb", moonbr_io_wait_nb},
jbe@205 1623 {"wait_call", moonbr_io_wait_call},
jbe@205 1624 {"wait_yield", moonbr_io_wait_yield},
jbe@205 1625 {NULL, NULL}
jbe@205 1626 };
jbe@205 1627
jbe@205 1628 static const struct luaL_Reg moonbr_io_child_metamethods[] = {
jbe@205 1629 {"__index", moonbr_io_childindex},
jbe@205 1630 {"__newindex", moonbr_io_childnewindex},
jbe@205 1631 {"__gc", moonbr_io_childgc},
jbe@205 1632 {NULL, NULL}
jbe@205 1633 };
jbe@205 1634
jbe@79 1635 static const struct luaL_Reg moonbr_io_module_funcs[] = {
jbe@111 1636 {"localconnect", moonbr_io_localconnect},
jbe@111 1637 {"localconnect_nb", moonbr_io_localconnect_nb},
jbe@98 1638 {"tcpconnect", moonbr_io_tcpconnect},
jbe@99 1639 {"tcpconnect_nb", moonbr_io_tcpconnect_nb},
jbe@112 1640 {"locallisten", moonbr_io_locallisten},
jbe@108 1641 {"tcplisten", moonbr_io_tcplisten},
jbe@205 1642 {"exec", moonbr_io_exec},
jbe@106 1643 {"poll", moonbr_io_poll},
jbe@115 1644 {"timeref", moonbr_io_timeref},
jbe@79 1645 {NULL, NULL}
jbe@79 1646 };
jbe@79 1647
jbe@79 1648 int luaopen_moonbridge_io(lua_State *L) {
jbe@79 1649
jbe@113 1650 signal(SIGPIPE, SIG_IGN); /* generate I/O errors instead of signal 13 */
jbe@113 1651
jbe@80 1652 lua_newtable(L); // module
jbe@80 1653
jbe@79 1654 lua_newtable(L); // public metatable
jbe@79 1655 lua_newtable(L); // handle methods
jbe@79 1656 luaL_setfuncs(L, moonbr_io_handle_methods, 0);
jbe@80 1657 lua_pushvalue(L, -1);
jbe@146 1658 lua_setfield(L, -4, "handle_pt");
jbe@79 1659 lua_setfield(L, -2, "__index");
jbe@79 1660 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79 1661
jbe@79 1662 lua_newtable(L); // handle metatable
jbe@79 1663 luaL_setfuncs(L, moonbr_io_handle_metamethods, 0);
jbe@146 1664 lua_pushvalue(L, -1);
jbe@146 1665 lua_setfield(L, -3, "handle_mt");
jbe@79 1666 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79 1667
jbe@108 1668 lua_newtable(L); // listener metatable
jbe@108 1669 luaL_setfuncs(L, moonbr_io_listener_metamethods, 0);
jbe@108 1670 lua_newtable(L); // listener methods
jbe@108 1671 luaL_setfuncs(L, moonbr_io_listener_methods, 0);
jbe@108 1672 lua_pushvalue(L, -1);
jbe@146 1673 lua_setfield(L, -4, "listener_pt");
jbe@108 1674 lua_setfield(L, -2, "__index");
jbe@146 1675 lua_pushvalue(L, -1);
jbe@146 1676 lua_setfield(L, -3, "listener_mt");
jbe@108 1677 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108 1678
jbe@205 1679 lua_newtable(L); // child methods
jbe@205 1680 luaL_setfuncs(L, moonbr_io_child_methods, 0);
jbe@205 1681 lua_pushvalue(L, -1);
jbe@205 1682 lua_setfield(L, -3, "child_pt");
jbe@205 1683 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_CHILD_PT_REGKEY);
jbe@205 1684 lua_newtable(L); // child metatable
jbe@205 1685 luaL_setfuncs(L, moonbr_io_child_metamethods, 0);
jbe@205 1686 lua_pushvalue(L, -1);
jbe@205 1687 lua_setfield(L, -3, "child_mt");
jbe@205 1688 lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205 1689
jbe@205 1690 moonbr_io_pushhandle(L, 0);
jbe@205 1691 lua_setfield(L, -2, "stdin");
jbe@205 1692 moonbr_io_pushhandle(L, 1);
jbe@205 1693 lua_setfield(L, -2, "stdout");
jbe@205 1694 moonbr_io_pushhandle(L, 2);
jbe@205 1695 lua_setfield(L, -2, "stderr");
jbe@205 1696
jbe@79 1697 luaL_setfuncs(L, moonbr_io_module_funcs, 0);
jbe@79 1698 return 1;
jbe@79 1699
jbe@79 1700 }
jbe@79 1701

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