jbe@209: 
jbe@209: #ifndef __has_include
jbe@209: #define __has_include(x) 0
jbe@209: #endif
jbe@79: 
jbe@79: #include <stdlib.h>
jbe@135: #include <stdint.h>
jbe@135: #include <string.h>
jbe@135: #include <errno.h>
jbe@79: #include <unistd.h>
jbe@135: #include <signal.h>
jbe@135: #include <fcntl.h>
jbe@135: #include <sys/stat.h>
jbe@79: #include <sys/socket.h>
jbe@111: #include <sys/un.h>
jbe@95: #include <netinet/in.h>
jbe@95: #include <netinet/tcp.h>
jbe@135: #include <sys/select.h>
jbe@136: #include <time.h>
jbe@135: #include <netdb.h>
jbe@107: #include <arpa/inet.h>
jbe@205: #include <sys/types.h>
jbe@205: #include <sys/wait.h>
jbe@209: #if defined(__linux__) || __has_include(<bsd/unistd.h>)
jbe@209: #include <bsd/unistd.h>
jbe@209: #endif
jbe@211: 
jbe@243: #ifdef MOONBR_IO_USE_TLS
jbe@243: #include <tls.h>
jbe@243: #endif
jbe@243: 
jbe@79: #include <lua.h>
jbe@79: #include <lauxlib.h>
jbe@79: #include <lualib.h>
jbe@79: 
jbe@149: #include <assert.h>
jbe@149: 
jbe@80: #define MOONBR_IO_MAXSTRERRORLEN 80
jbe@85: #define MOONBR_IO_READBUFLEN 4096
jbe@80: #define MOONBR_IO_WRITEBUFLEN 4096
jbe@80: 
jbe@108: #define MOONBR_IO_LISTEN_BACKLOG 1024
jbe@108: 
jbe@213: #define MOONBR_IO_STRERROR_R_MSG "Error detail unavailable due to noncompliant strerror_r() implementation"
jbe@80: #define moonbr_io_errmsg() \
jbe@213:   char errmsg[MOONBR_IO_MAXSTRERRORLEN] = MOONBR_IO_STRERROR_R_MSG; \
jbe@80:   strerror_r(errno, errmsg, MOONBR_IO_MAXSTRERRORLEN)
jbe@80: 
jbe@79: #define MOONBR_IO_HANDLE_MT_REGKEY "moonbridge_io_handle"
jbe@79: #define MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY "moonbridge_io_handle_public"
jbe@108: #define MOONBR_IO_LISTENER_MT_REGKEY "moonbridge_io_listener"
jbe@205: #define MOONBR_IO_CHILD_MT_REGKEY "moonbridge_io_child"
jbe@205: #define MOONBR_IO_CHILD_PT_REGKEY "moonbridge_io_child_pt"
jbe@79: 
jbe@243: #ifdef MOONBR_IO_USE_TLS
jbe@243: #define MOONBR_IO_TLSCONF_MT_REGKEY "moonbridge_io_tlsconf"
jbe@243: #endif
jbe@243: 
jbe@79: typedef struct {
jbe@79:   int fd;
jbe@107:   int issock;
jbe@107:   sa_family_t addrfam;
jbe@94:   int finished;
jbe@94:   int closed;
jbe@81:   int nonblocking;
jbe@95:   int nopush;
jbe@85:   int readerr;
jbe@105:   int readbufin;
jbe@105:   int readbufout;
jbe@81:   int writeerr;
jbe@83:   size_t writeleft;
jbe@132:   size_t flushedleft;
jbe@83: #if LUA_VERSION_NUM >= 503
jbe@83:   lua_Integer writeqin;
jbe@83:   lua_Integer writeqout;
jbe@83: #else
jbe@83:   int writeqin;
jbe@83:   int writeqout;
jbe@83: #endif
jbe@83:   size_t writeqoff;
jbe@103:   int writebufin;
jbe@103:   int writebufout;
jbe@85:   char readbuf[MOONBR_IO_READBUFLEN];
jbe@80:   char writebuf[MOONBR_IO_WRITEBUFLEN];
jbe@79: } moonbr_io_handle_t;
jbe@79: 
jbe@108: typedef struct {
jbe@108:   int fd;
jbe@118:   sa_family_t addrfam;
jbe@108:   int nonblocking;
jbe@108: } moonbr_io_listener_t;
jbe@108: 
jbe@205: typedef struct {
jbe@205:   pid_t pid;
jbe@205: } moonbr_io_child_t;
jbe@205: 
jbe@148: static int moonbr_io_yield(lua_State *L) {
jbe@149:   return lua_yield(L, lua_gettop(L));
jbe@140: }
jbe@140: 
jbe@140: #if LUA_VERSION_NUM >= 503
jbe@140: static int moonbr_io_cont_returnall(lua_State *L, int status, lua_KContext ctx) {
jbe@140: #else
jbe@140: static int moonbr_io_cont_returnall(lua_State *L) {
jbe@140: #endif
jbe@140:   return lua_gettop(L);
jbe@140: }
jbe@140: 
jbe@145: #define moonbr_io_yield_wrapper(yieldfunc, callfunc) \
jbe@145:   static int yieldfunc(lua_State *L) { \
jbe@145:     int args; \
jbe@145:     lua_pushcfunction(L, callfunc); \
jbe@145:     lua_insert(L, 1); \
jbe@145:     args = lua_gettop(L); \
jbe@148:     lua_pushcfunction(L, moonbr_io_yield); \
jbe@145:     lua_insert(L, 3); \
jbe@145:     lua_callk(L, args, LUA_MULTRET, 0, moonbr_io_cont_returnall); \
jbe@145:     return lua_gettop(L); \
jbe@145:   }
jbe@145: 
jbe@81: static void moonbr_io_handle_set_nonblocking(lua_State *L, moonbr_io_handle_t *handle, int nonblocking) {
jbe@95:   int flags;
jbe@95:   if (handle->nonblocking == nonblocking) return;
jbe@95:   flags = fcntl(handle->fd, F_GETFL, 0);
jbe@95:   if (flags == -1) {
jbe@95:     moonbr_io_errmsg();
jbe@96:     close(handle->fd);
jbe@96:     handle->fd = -1;
jbe@96:     handle->closed = 1;
jbe@95:     luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@81:   }
jbe@95:   if (nonblocking) flags |= O_NONBLOCK;
jbe@95:   else flags &= ~O_NONBLOCK;
jbe@95:   if (fcntl(handle->fd, F_SETFL, flags) == -1) {
jbe@95:     moonbr_io_errmsg();
jbe@96:     close(handle->fd);
jbe@96:     handle->fd = -1;
jbe@96:     handle->closed = 1;
jbe@95:     luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@95:   }
jbe@95:   handle->nonblocking = nonblocking;
jbe@81: }
jbe@81: 
jbe@87: static void moonbr_io_handle_set_linger(lua_State *L, moonbr_io_handle_t *handle, int timeout) {
jbe@87:   struct linger lingerval = { 0, };
jbe@107:   if (!handle->issock) return;
jbe@87:   if (timeout >= 0) {
jbe@87:     lingerval.l_onoff = 1;
jbe@87:     lingerval.l_linger = timeout;
jbe@87:   }
jbe@87:   if (setsockopt(handle->fd, SOL_SOCKET, SO_LINGER, &lingerval, sizeof(lingerval))) {
jbe@87:     moonbr_io_errmsg();
jbe@96:     close(handle->fd);
jbe@96:     handle->fd = -1;
jbe@96:     handle->closed = 1;
jbe@95:     luaL_error(L, "Unexpected error while setting SO_LINGER with setsockopt: %s", errmsg);
jbe@87:   }
jbe@87: }
jbe@87: 
jbe@133: static inline void moonbr_io_handle_set_nopush(lua_State *L, moonbr_io_handle_t *handle, int nopush) {
jbe@96: #if defined(TCP_NOPUSH) || defined(TCP_CORK)
jbe@107:   if (
jbe@107:     !(handle->addrfam == AF_INET6 || handle->addrfam == AF_INET) ||
jbe@107:     handle->nopush == nopush
jbe@107:   ) return;
jbe@96: #if defined(TCP_NOPUSH)
jbe@96:   if (setsockopt(handle->fd, IPPROTO_TCP, TCP_NOPUSH, &nopush, sizeof(nopush))) {
jbe@104: #elif defined(TCP_CORK)
jbe@104:   if (setsockopt(handle->fd, IPPROTO_TCP, TCP_CORK, &nopush, sizeof(nopush))) {
jbe@104: #endif
jbe@96:     moonbr_io_errmsg();
jbe@96:     close(handle->fd);
jbe@96:     handle->fd = -1;
jbe@96:     handle->closed = 1;
jbe@104: #if defined(TCP_NOPUSH)
jbe@96:     luaL_error(L, "Unexpected error while setting TCP_NOPUSH with setsockopt: %s", errmsg);
jbe@96: #elif defined(TCP_CORK)
jbe@95:     luaL_error(L, "Unexpected error while setting TCP_CORK with setsockopt: %s", errmsg);
jbe@104: #endif
jbe@95:   }
jbe@95:   handle->nopush = nopush;
jbe@96: #else
jbe@96: #warning Neither TCP_NOPUSH nor TCP_CORK is available
jbe@96: #endif
jbe@95: }
jbe@95: 
jbe@86: static int moonbr_io_read_impl(lua_State *L, int nonblocking, int drain) {
jbe@85:   moonbr_io_handle_t *handle;
jbe@85:   lua_Integer maxread;
jbe@85:   const char *terminatorstr;
jbe@210:   size_t terminatorlen;
jbe@210:   char terminator = 0;  /* initialize to avoid compiler warning */
jbe@85:   luaL_Buffer luabuf;
jbe@85:   size_t luabufcnt = 0;
jbe@105:   int remaining;
jbe@85:   char *terminatorpos;
jbe@103:   ssize_t bytesread;
jbe@85:   handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@153:   maxread = luaL_optinteger(L, 2, -1);
jbe@85:   terminatorstr = luaL_optlstring(L, 3, "", &terminatorlen);
jbe@85:   if (terminatorlen) {
jbe@85:     luaL_argcheck(L, terminatorlen == 1, 3, "single byte expected");
jbe@85:     terminator = terminatorstr[0];
jbe@85:   }
jbe@86:   lua_settop(L, 1);  /* return handle on drain, terminator string may be garbage collected */
jbe@94:   if (handle->closed) luaL_error(L, "Attempt to read from a closed I/O handle");
jbe@85:   if (handle->readerr) {
jbe@85:     lua_pushnil(L);
jbe@85:     lua_pushliteral(L, "Previous read error");
jbe@85:     return 2;
jbe@85:   }
jbe@143:   if (handle->fd < 0) {
jbe@143:     /* fake EOF to simulate shutdown */
jbe@143:     if (!drain) lua_pushliteral(L, "");
jbe@143:     else lua_pushinteger(L, 0);
jbe@143:     lua_pushliteral(L, "eof");
jbe@143:     return 2;
jbe@143:   }
jbe@105:   handle->readerr = 1;
jbe@85:   moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@86:   if (!drain) luaL_buffinit(L, &luabuf);
jbe@85:   while (1) {
jbe@105:     remaining = -1;
jbe@142:     terminatorpos = NULL;
jbe@105:     if (
jbe@153:       maxread >= 0 &&
jbe@143:       handle->readbufin - handle->readbufout >= (size_t)maxread - luabufcnt
jbe@105:     ) {
jbe@142:       remaining = (size_t)maxread - luabufcnt;
jbe@193:       if (terminatorlen) {
jbe@193:         terminatorpos = memchr(
jbe@193:           handle->readbuf + handle->readbufout,
jbe@193:           terminator,
jbe@193:           remaining
jbe@193:         );
jbe@193:       }
jbe@85:     } else if (terminatorlen) {
jbe@105:       terminatorpos = memchr(
jbe@105:         handle->readbuf + handle->readbufout,
jbe@105:         terminator,
jbe@105:         handle->readbufin - handle->readbufout
jbe@105:       );
jbe@85:     }
jbe@142:     if (terminatorpos) remaining = 1 + (
jbe@142:       terminatorpos - (handle->readbuf + handle->readbufout)
jbe@142:     );
jbe@105:     if (remaining >= 0) {
jbe@86:       if (!drain) {
jbe@105:         luaL_addlstring(
jbe@105:           &luabuf,
jbe@105:           handle->readbuf + handle->readbufout,
jbe@105:           remaining
jbe@105:         );
jbe@86:         luaL_pushresult(&luabuf);
jbe@90:       } else {
jbe@105:         lua_pushinteger(L, luabufcnt + remaining);
jbe@86:       }
jbe@143:       if (terminatorpos) lua_pushliteral(L, "term");
jbe@143:       else lua_pushliteral(L, "maxlen");
jbe@105:       handle->readbufout += remaining;
jbe@105:       if (handle->readbufout == handle->readbufin) {
jbe@105:         handle->readbufin = 0;
jbe@143:         handle->readbufout = 0;
jbe@105:       }
jbe@104:       handle->readerr = 0;
jbe@143:       return 2;
jbe@85:     }
jbe@105:     if (!drain) luaL_addlstring(
jbe@105:       &luabuf,
jbe@105:       handle->readbuf + handle->readbufout,
jbe@105:       handle->readbufin - handle->readbufout
jbe@105:     );
jbe@105:     luabufcnt += handle->readbufin - handle->readbufout;
jbe@143:     handle->readbufout = 0;
jbe@85:     do {
jbe@103:       bytesread = read(handle->fd, handle->readbuf, MOONBR_IO_READBUFLEN);
jbe@103:     } while (bytesread < 0 && (errno == EINTR));
jbe@105:     if (
jbe@105:       bytesread == 0 || (
jbe@105:         nonblocking &&
jbe@105:         bytesread < 0 && (errno == EAGAIN || errno == EWOULDBLOCK)
jbe@105:       )
jbe@105:     ) {
jbe@105:       handle->readbufin = 0;
jbe@143:       if (!drain) luaL_pushresult(&luabuf);
jbe@143:       else lua_pushinteger(L, luabufcnt);
jbe@143:       if (bytesread == 0) lua_pushliteral(L, "eof");
jbe@143:       else lua_pushliteral(L, "block");
jbe@105:       handle->readerr = 0;
jbe@143:       return 2;
jbe@105:     }
jbe@103:     if (bytesread < 0) {
jbe@85:       moonbr_io_errmsg();
jbe@85:       lua_pushnil(L);
jbe@85:       lua_pushstring(L, errmsg);
jbe@85:       return 2;
jbe@85:     }
jbe@105:     handle->readbufin = bytesread;
jbe@86:   }
jbe@85: }
jbe@85: 
jbe@85: static int moonbr_io_read(lua_State *L) {
jbe@86:   return moonbr_io_read_impl(L, 0, 0);
jbe@85: }
jbe@85: 
jbe@85: static int moonbr_io_read_nb(lua_State *L) {
jbe@86:   return moonbr_io_read_impl(L, 1, 0);
jbe@86: }
jbe@86: 
jbe@86: static int moonbr_io_drain(lua_State *L) {
jbe@86:   return moonbr_io_read_impl(L, 0, 1);
jbe@86: }
jbe@86: 
jbe@86: static int moonbr_io_drain_nb(lua_State *L) {
jbe@86:   return moonbr_io_read_impl(L, 1, 1);
jbe@85: }
jbe@85: 
jbe@140: #if LUA_VERSION_NUM >= 503
jbe@140: static int moonbr_io_read_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@140: #else
jbe@140: static int moonbr_io_read_cont(lua_State *L) {
jbe@140: #endif
jbe@143:   lua_Integer remaining;
jbe@143:   size_t len;
jbe@140: #if !(LUA_VERSION_NUM >= 503)
jbe@140:   int ctx = 0;
jbe@140:   lua_getctx(L, &ctx);
jbe@140: #endif
jbe@140:   remaining = lua_tointeger(L, 3);
jbe@140:   while (1) {
jbe@140:     lua_pushcfunction(L, moonbr_io_read_nb);
jbe@140:     lua_pushvalue(L, 1);
jbe@140:     lua_pushvalue(L, 3);
jbe@140:     lua_pushvalue(L, 4);
jbe@140:     lua_call(L, 3, 2);
jbe@143:     if (lua_isnil(L, -2)) return 2;
jbe@143:     lua_insert(L, -2);
jbe@143:     len = lua_rawlen(L, -1);
jbe@143:     if (ctx == 0) {
jbe@143:       lua_replace(L, 5);
jbe@143:       ctx = 1;
jbe@143:     } else if (ctx == 1) {
jbe@143:       lua_pushvalue(L, 5);
jbe@143:       lua_newtable(L);
jbe@143:       lua_replace(L, 5);
jbe@143:       lua_rawseti(L, 5, 2);
jbe@143:       lua_rawseti(L, 5, 1);
jbe@143:       ctx = 2;
jbe@140:     } else {
jbe@143:       lua_rawseti(L, 5, lua_rawlen(L, 5) + 1);
jbe@140:     }
jbe@144:     if (strcmp(lua_tostring(L, -1), "block") != 0) break;
jbe@144:     lua_pop(L, 1);
jbe@144:     if (remaining >= 0 && len) {
jbe@143:       remaining -= len;
jbe@143:       lua_pushinteger(L, remaining);
jbe@143:       lua_replace(L, 3);
jbe@143:     }
jbe@140:     lua_pushvalue(L, 2);
jbe@152:     lua_callk(L, 0, 0, ctx, moonbr_io_read_cont);
jbe@140:   }
jbe@140:   if (ctx == 1) {
jbe@140:     lua_pushvalue(L, 5);
jbe@140:   } else {
jbe@140:     luaL_Buffer buf;
jbe@140:     lua_Integer i, chunkcount;
jbe@140:     chunkcount = lua_rawlen(L, 5);
jbe@140:     luaL_buffinit(L, &buf);
jbe@140:     for (i=1; i<=chunkcount && i>0; i++) {
jbe@140:       lua_rawgeti(L, 5, i);
jbe@140:       luaL_addvalue(&buf);
jbe@140:     }
jbe@140:     luaL_pushresult(&buf);
jbe@140:   }
jbe@143:   lua_pushvalue(L, -2);
jbe@143:   return 2;
jbe@140: }
jbe@140: 
jbe@140: static int moonbr_io_read_call(lua_State *L) {
jbe@140:   lua_settop(L, 4);
jbe@140:   lua_pushnil(L);
jbe@140: #if LUA_VERSION_NUM >= 503
jbe@140:   return moonbr_io_read_cont(L, 0, 0);
jbe@140: #else
jbe@140:   return moonbr_io_read_cont(L);
jbe@140: #endif
jbe@140: }
jbe@140: 
jbe@145: moonbr_io_yield_wrapper(moonbr_io_read_yield, moonbr_io_read_call);
jbe@140: 
jbe@144: #if LUA_VERSION_NUM >= 503
jbe@144: static int moonbr_io_drain_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@144: #else
jbe@144: static int moonbr_io_drain_cont(lua_State *L) {
jbe@144: #endif
jbe@144:   lua_Integer remaining, len;
jbe@144:   size_t totallen = 0;
jbe@144: #if !(LUA_VERSION_NUM >= 503)
jbe@144:   int ctx = 0;
jbe@144:   lua_getctx(L, &ctx);
jbe@144: #endif
jbe@144:   remaining = lua_tointeger(L, 3);
jbe@144:   while (1) {
jbe@144:     lua_pushcfunction(L, moonbr_io_drain_nb);
jbe@144:     lua_pushvalue(L, 1);
jbe@144:     lua_pushvalue(L, 3);
jbe@144:     lua_pushvalue(L, 4);
jbe@144:     lua_call(L, 3, 2);
jbe@144:     if (lua_isnil(L, -2)) return 2;
jbe@144:     lua_insert(L, -2);
jbe@144:     len = lua_tointeger(L, -1);
jbe@144:     lua_pop(L, 1);
jbe@144:     totallen += len;
jbe@144:     if (strcmp(lua_tostring(L, -1), "block") != 0) break;
jbe@144:     lua_pop(L, 1);
jbe@144:     if (remaining >= 0 && len) {
jbe@144:       remaining -= len;
jbe@144:       lua_pushinteger(L, remaining);
jbe@144:       lua_replace(L, 3);
jbe@144:     }
jbe@144:     lua_pushvalue(L, 2);
jbe@152:     lua_callk(L, 0, 0, ctx, moonbr_io_drain_cont);
jbe@144:   }
jbe@144:   lua_pushinteger(L, totallen);
jbe@144:   lua_pushvalue(L, -2);
jbe@144:   return 2;
jbe@144: }
jbe@144: 
jbe@144: static int moonbr_io_drain_call(lua_State *L) {
jbe@144: #if LUA_VERSION_NUM >= 503
jbe@144:   return moonbr_io_drain_cont(L, 0, 0);
jbe@144: #else
jbe@144:   return moonbr_io_drain_cont(L);
jbe@144: #endif
jbe@144: }
jbe@144: 
jbe@145: moonbr_io_yield_wrapper(moonbr_io_drain_yield, moonbr_io_drain_call);
jbe@144: 
jbe@81: static int moonbr_io_write_impl(lua_State *L, int nonblocking, int flush) {
jbe@80:   moonbr_io_handle_t *handle;
jbe@80:   int i, top;
jbe@80:   const char *str;
jbe@92:   size_t strlen;
jbe@103:   ssize_t written;
jbe@80:   handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94:   if (handle->closed) luaL_error(L, "Attempt to write to a closed I/O handle");
jbe@94:   if (handle->finished) luaL_error(L, "Attempt to write to a finished I/O handle");
jbe@81:   if (handle->writeerr) {
jbe@80:     lua_pushnil(L);
jbe@80:     lua_pushliteral(L, "Previous write error");
jbe@80:     return 2;
jbe@80:   }
jbe@103:   handle->writeerr = 1;
jbe@81:   moonbr_io_handle_set_nonblocking(L, handle, nonblocking);
jbe@84:   top = lua_gettop(L);
jbe@81:   lua_getuservalue(L, 1);
jbe@103:   lua_getfield(L, -1, "writequeue");
jbe@84:   for (i=2; i<=top; i++) {
jbe@84:     luaL_checklstring(L, i, &strlen);
jbe@84:     lua_pushvalue(L, i);
jbe@84:     lua_rawseti(L, -2, handle->writeqin++);
jbe@84:     handle->writeleft += strlen;
jbe@81:   }
jbe@132:   if (flush) handle->flushedleft = handle->writeleft;
jbe@83:   while (handle->writeqout != handle->writeqin) {
jbe@83:     lua_rawgeti(L, -1, handle->writeqout);
jbe@81:     str = lua_tolstring(L, -1, &strlen);
jbe@92:     while (handle->writeqoff < strlen) {
jbe@103:       if (
jbe@132:         strlen - handle->writeqoff <
jbe@103:         MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103:       ) {
jbe@103:         memcpy(
jbe@103:           handle->writebuf + handle->writebufin,
jbe@103:           str + handle->writeqoff,
jbe@103:           strlen - handle->writeqoff
jbe@103:         );
jbe@103:         handle->writebufin += strlen - handle->writeqoff;
jbe@80:         break;
jbe@80:       } else {
jbe@103:         memcpy(
jbe@103:           handle->writebuf + handle->writebufin,
jbe@103:           str + handle->writeqoff,
jbe@103:           MOONBR_IO_WRITEBUFLEN - handle->writebufin
jbe@103:         );
jbe@103:         handle->writeqoff += MOONBR_IO_WRITEBUFLEN - handle->writebufin;
jbe@228:         handle->writebufin = MOONBR_IO_WRITEBUFLEN;
jbe@103:         while (handle->writebufout < MOONBR_IO_WRITEBUFLEN) {
jbe@133:           moonbr_io_handle_set_nopush(L, handle, 1);
jbe@103:           written = write(
jbe@103:             handle->fd,
jbe@103:             handle->writebuf + handle->writebufout,
jbe@103:             MOONBR_IO_WRITEBUFLEN - handle->writebufout
jbe@103:           );
jbe@103:           if (written < 0) {
jbe@81:             if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@81:               goto moonbr_io_write_impl_block;
jbe@81:             } else if (errno != EINTR) {
jbe@80:               moonbr_io_errmsg();
jbe@80:               lua_pushnil(L);
jbe@80:               lua_pushstring(L, errmsg);
jbe@80:               return 2;
jbe@80:             }
jbe@103:           } else {
jbe@103:             handle->writebufout += written;
jbe@103:             handle->writeleft -= written;
jbe@133:             if (handle->flushedleft) {
jbe@133:               if (written >= handle->flushedleft) {
jbe@133:                 handle->flushedleft = 0;
jbe@133:                 moonbr_io_handle_set_nopush(L, handle, 0);
jbe@133:               } else {
jbe@133:                 handle->flushedleft -= written;
jbe@133:               }
jbe@133:             }
jbe@80:           }
jbe@80:         }
jbe@103:         handle->writebufin = 0;
jbe@103:         handle->writebufout = 0;
jbe@80:       }
jbe@80:     }
jbe@81:     handle->writeqoff = 0;
jbe@81:     lua_pop(L, 1);
jbe@81:     lua_pushnil(L);
jbe@83:     lua_rawseti(L, -2, handle->writeqout++);
jbe@80:   }
jbe@132:   while (handle->flushedleft) {
jbe@133:     moonbr_io_handle_set_nopush(L, handle, 1);
jbe@132:     written = write(
jbe@132:       handle->fd,
jbe@132:       handle->writebuf + handle->writebufout,
jbe@132:       handle->writebufin - handle->writebufout
jbe@132:     );
jbe@132:     if (written < 0) {
jbe@132:       if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@132:         goto moonbr_io_write_impl_block;
jbe@132:       } else if (errno != EINTR) {
jbe@132:         moonbr_io_errmsg();
jbe@132:         lua_pushnil(L);
jbe@132:         lua_pushstring(L, errmsg);
jbe@132:         return 2;
jbe@81:       }
jbe@132:     } else {
jbe@132:       handle->writebufout += written;
jbe@132:       handle->writeleft -= written;
jbe@133:       if (handle->flushedleft) {
jbe@133:         if (written >= handle->flushedleft) {
jbe@133:           handle->flushedleft = 0;
jbe@133:           moonbr_io_handle_set_nopush(L, handle, 0);
jbe@133:         } else {
jbe@133:           handle->flushedleft -= written;
jbe@133:         }
jbe@133:       }
jbe@81:     }
jbe@132:   }
jbe@132:   if (handle->writebufout == handle->writebufin) {
jbe@103:     handle->writebufin = 0;
jbe@103:     handle->writebufout = 0;
jbe@81:   }
jbe@103:   if (nonblocking) lua_pushinteger(L, 0);
jbe@103:   else lua_pushvalue(L, 1);
jbe@103:   handle->writeerr = 0;
jbe@80:   return 1;
jbe@81:   moonbr_io_write_impl_block:
jbe@91:   lua_pushinteger(L, handle->writeleft);
jbe@103:   handle->writeerr = 0;
jbe@81:   return 1;
jbe@81: }
jbe@81: 
jbe@81: static int moonbr_io_write(lua_State *L) {
jbe@81:   return moonbr_io_write_impl(L, 0, 0);
jbe@81: }
jbe@81: 
jbe@81: static int moonbr_io_write_nb(lua_State *L) {
jbe@81:   return moonbr_io_write_impl(L, 1, 0);
jbe@80: }
jbe@80: 
jbe@80: static int moonbr_io_flush(lua_State *L) {
jbe@81:   return moonbr_io_write_impl(L, 0, 1);
jbe@81: }
jbe@81: 
jbe@81: static int moonbr_io_flush_nb(lua_State *L) {
jbe@81:   return moonbr_io_write_impl(L, 1, 1);
jbe@80: }
jbe@80: 
jbe@145: #if LUA_VERSION_NUM >= 503
jbe@145: static int moonbr_io_write_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@145: #else
jbe@145: static int moonbr_io_write_cont(lua_State *L) {
jbe@145: #endif
jbe@145:   while (1) {
jbe@145:     lua_pushcfunction(L, moonbr_io_write_nb);
jbe@145:     lua_pushvalue(L, 1);
jbe@145:     lua_call(L, 1, 2);
jbe@145:     if (lua_isnil(L, -2)) return 2;
jbe@145:     if (!lua_tointeger(L, -2)) {
jbe@145:       lua_pushvalue(L, 1);
jbe@145:       return 1;
jbe@145:     }
jbe@145:     lua_pop(L, 2);
jbe@145:     lua_pushvalue(L, 2);
jbe@152:     lua_callk(L, 0, 0, 0, moonbr_io_write_cont);
jbe@145:   }
jbe@145: }
jbe@145: 
jbe@145: static int moonbr_io_write_call(lua_State *L) {
jbe@145:   lua_pushcfunction(L, moonbr_io_write_nb);
jbe@145:   lua_insert(L, 3);
jbe@145:   lua_pushvalue(L, 1);
jbe@145:   lua_insert(L, 4);
jbe@145:   lua_call(L, lua_gettop(L) - 3, 2);
jbe@145:   if (lua_isnil(L, -2)) return 2;
jbe@145:   if (!lua_tointeger(L, -2)) {
jbe@145:     lua_pushvalue(L, 1);
jbe@145:     return 1;
jbe@145:   }
jbe@145: #if LUA_VERSION_NUM >= 503
jbe@145:   return moonbr_io_write_cont(L, 0, 0);
jbe@145: #else
jbe@145:   return moonbr_io_write_cont(L);
jbe@145: #endif
jbe@145: }
jbe@145: 
jbe@145: moonbr_io_yield_wrapper(moonbr_io_write_yield, moonbr_io_write_call);
jbe@145: 
jbe@145: static int moonbr_io_flush_call(lua_State *L) {
jbe@145:   lua_pushcfunction(L, moonbr_io_flush_nb);
jbe@145:   lua_insert(L, 3);
jbe@145:   lua_pushvalue(L, 1);
jbe@145:   lua_insert(L, 4);
jbe@145:   lua_call(L, lua_gettop(L) - 3, 2);
jbe@145:   if (lua_isnil(L, -2)) return 2;
jbe@145:   if (!lua_tointeger(L, -2)) {
jbe@145:     lua_pushvalue(L, 1);
jbe@145:     return 1;
jbe@145:   }
jbe@145: #if LUA_VERSION_NUM >= 503
jbe@145:   return moonbr_io_write_cont(L, 0, 0);
jbe@145: #else
jbe@145:   return moonbr_io_write_cont(L);
jbe@145: #endif
jbe@145: }
jbe@145: 
jbe@145: moonbr_io_yield_wrapper(moonbr_io_flush_yield, moonbr_io_flush_call);
jbe@145: 
jbe@88: static int moonbr_io_finish(lua_State *L) {
jbe@88:   moonbr_io_handle_t *handle;
jbe@88:   handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94:   if (handle->closed) luaL_error(L, "Attempt to finish a closed I/O handle");
jbe@94:   if (handle->finished) luaL_error(L, "Attempt to finish a finished I/O handle");
jbe@94:   if (handle->writeleft) {
jbe@94:     lua_pushcfunction(L, moonbr_io_flush);
jbe@94:     lua_pushvalue(L, 1);
jbe@116:     if (lua_pcall(L, 1, 2, 0)) {
jbe@116:       handle->finished = 1;
jbe@116:       lua_error(L);
jbe@116:     }
jbe@94:     if (!lua_toboolean(L, -2)) {
jbe@94:       handle->finished = 1;
jbe@94:       return 2;
jbe@88:     }
jbe@94:   }
jbe@94:   handle->finished = 1;
jbe@107:   if (handle->addrfam == AF_INET6 || handle->addrfam == AF_INET) {
jbe@88:     if (shutdown(handle->fd, SHUT_WR)) {
jbe@88:       moonbr_io_errmsg();
jbe@88:       lua_pushnil(L);
jbe@88:       lua_pushstring(L, errmsg);
jbe@88:       return 2;
jbe@88:     }
jbe@94:   } else {
jbe@94:     if (close(handle->fd)) {
jbe@94:       moonbr_io_errmsg();
jbe@94:       handle->fd = -1;
jbe@94:       lua_pushnil(L);
jbe@94:       lua_pushstring(L, errmsg);
jbe@94:       return 2;
jbe@94:     }
jbe@94:     handle->fd = -1;  /* fake EOF on read */
jbe@88:   }
jbe@88:   lua_pushboolean(L, 1);
jbe@88:   return 1;
jbe@88: }
jbe@88: 
jbe@94: static int moonbr_io_close_impl(lua_State *L, int reset) {
jbe@83:   moonbr_io_handle_t *handle;
jbe@83:   handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@94:   if (handle->closed) luaL_error(L, "Attempt to close a closed I/O handle");
jbe@94:   if (!reset) {
jbe@87:     if (handle->writeleft) {
jbe@87:       lua_pushcfunction(L, moonbr_io_flush);
jbe@87:       lua_pushvalue(L, 1);
jbe@116:       if (lua_pcall(L, 1, 2, 0)) {
jbe@129:         handle->closed = 1;
jbe@116:         close(handle->fd);
jbe@116:         handle->fd = -1;
jbe@116:         lua_error(L);
jbe@116:       }
jbe@129:       handle->closed = 1;
jbe@87:       if (!lua_toboolean(L, -2)) {
jbe@87:         close(handle->fd);
jbe@87:         handle->fd = -1;
jbe@87:         return 2;
jbe@87:       }
jbe@129:     } else {
jbe@129:       handle->closed = 1;
jbe@129:       moonbr_io_handle_set_linger(L, handle, -1);
jbe@83:     }
jbe@129:   } else {
jbe@129:     handle->closed = 1;
jbe@83:   }
jbe@94:   if (handle->fd >= 0) {
jbe@94:     if (close(handle->fd)) {
jbe@94:       moonbr_io_errmsg();
jbe@94:       handle->fd = -1;
jbe@94:       lua_pushnil(L);
jbe@94:       lua_pushstring(L, errmsg);
jbe@94:       return 2;
jbe@94:     }
jbe@104:     handle->fd = -1;
jbe@83:   }
jbe@83:   lua_pushboolean(L, 1);
jbe@83:   return 1;
jbe@84: 
jbe@83: }
jbe@83: 
jbe@94: static int moonbr_io_close(lua_State *L) {
jbe@94:   return moonbr_io_close_impl(L, 0);
jbe@94: }
jbe@94: 
jbe@84: static int moonbr_io_reset(lua_State *L) {
jbe@94:   return moonbr_io_close_impl(L, 1);
jbe@84: }
jbe@84: 
jbe@108: static int moonbr_io_handlegc(lua_State *L) {
jbe@88:   moonbr_io_handle_t *handle;
jbe@88:   handle = luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@88:   if (handle->fd >= 0) {
jbe@218:     lua_pushcfunction(L, moonbr_io_reset);
jbe@88:     lua_pushvalue(L, 1);
jbe@88:     lua_pushinteger(L, 0);
jbe@88:     lua_call(L, 2, 0);
jbe@88:   }
jbe@88:   return 0;
jbe@88: }
jbe@88: 
jbe@100: void moonbr_io_closehandle(lua_State *L, int idx, int reset) {
jbe@88:   moonbr_io_handle_t *handle;
jbe@88:   handle = luaL_checkudata(L, idx, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@100:   if (!handle->closed) {
jbe@100:     lua_pushcfunction(L, reset ? moonbr_io_reset : moonbr_io_close);
jbe@100:     lua_pushvalue(L, idx < 0 ? idx-1 : idx);
jbe@100:     lua_call(L, 1, 0);
jbe@88:   }
jbe@88: }
jbe@88: 
jbe@208: static int moonbr_io_pushhandle_impl(lua_State *L) {
jbe@208:   int *fd;
jbe@79:   moonbr_io_handle_t *handle;
jbe@107:   struct sockaddr addr;
jbe@107:   socklen_t addrlen;
jbe@208:   fd = lua_touserdata(L, 1);
jbe@79:   handle = lua_newuserdata(L, sizeof(moonbr_io_handle_t));
jbe@208:   handle->fd = -1;  /* avoid closing incomplete handle */
jbe@107:   addrlen = sizeof(addr);
jbe@208:   if (getsockname(*fd, &addr, &addrlen)) {
jbe@107:     if (errno != ENOTSOCK) {
jbe@107:       moonbr_io_errmsg();
jbe@107:       luaL_error(L, "Unexpected error when examining socket: %s", errmsg);
jbe@107:     }
jbe@107:     handle->issock = 0;
jbe@107:   } else {
jbe@107:     handle->issock = 1;
jbe@107:     handle->addrfam = addr.sa_family;
jbe@107:   }
jbe@94:   handle->finished = 0;
jbe@94:   handle->closed = 0;
jbe@81:   handle->nonblocking = -1;
jbe@95:   handle->nopush = -1;
jbe@85:   handle->readerr = 0;
jbe@105:   handle->readbufin = 0;
jbe@105:   handle->readbufout = 0;
jbe@81:   handle->writeerr = 0;
jbe@81:   handle->writeleft = 0;
jbe@132:   handle->flushedleft = 0;
jbe@83:   handle->writeqin = 0;
jbe@83:   handle->writeqout = 0;
jbe@81:   handle->writeqoff = 0;
jbe@103:   handle->writebufin = 0;
jbe@103:   handle->writebufout = 0;
jbe@208:   handle->fd = *fd;  /* required for set_linger call */
jbe@87:   moonbr_io_handle_set_linger(L, handle, 0);
jbe@208:   handle->fd = -1;  /* avoid closing incomplete handle */
jbe@238:   luaL_setmetatable(L, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79:   lua_newtable(L);  // uservalue
jbe@81:   lua_newtable(L);
jbe@103:   lua_setfield(L, -2, "writequeue");
jbe@79:   lua_newtable(L);  // public
jbe@107:   if (handle->addrfam == AF_INET6) {
jbe@107:     struct sockaddr_in6 addr_in6;
jbe@107:     char addrstrbuf[INET6_ADDRSTRLEN];
jbe@107:     const char *addrstr;
jbe@107:     addrlen = sizeof(addr_in6);
jbe@208:     if (getsockname(*fd, (struct sockaddr *)&addr_in6, &addrlen)) {
jbe@107:       moonbr_io_errmsg();
jbe@107:       luaL_error(L, "Could not determine local IP address/port: %s", errmsg);
jbe@107:     }
jbe@107:     if (addrlen > sizeof(addr_in6)) {
jbe@107:       luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");
jbe@107:     }
jbe@107:     addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107:     if (!addrstr) {
jbe@107:       moonbr_io_errmsg();
jbe@107:       luaL_error(L, "Could not format local IP address: %s", errmsg);
jbe@107:     } else {
jbe@107:       lua_pushstring(L, addrstr);
jbe@107:       lua_setfield(L, -2, "local_ip6");
jbe@107:     }
jbe@107:     lua_pushinteger(L, ntohs(addr_in6.sin6_port));
jbe@107:     lua_setfield(L, -2, "local_tcpport");
jbe@208:     if (getpeername(*fd, (struct sockaddr *)&addr_in6, &addrlen)) {
jbe@107:       moonbr_io_errmsg();
jbe@107:       luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);
jbe@107:     }
jbe@107:     if (addrlen > sizeof(addr_in6)) {
jbe@107:       luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");
jbe@107:     }
jbe@107:     addrstr = inet_ntop(AF_INET6, addr_in6.sin6_addr.s6_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107:     if (!addrstr) {
jbe@107:       moonbr_io_errmsg();
jbe@107:       luaL_error(L, "Could not format remote IP address: %s", errmsg);
jbe@107:     } else {
jbe@107:       lua_pushstring(L, addrstr);
jbe@107:       lua_setfield(L, -2, "remote_ip6");
jbe@107:     }
jbe@107:     lua_pushinteger(L, ntohs(addr_in6.sin6_port));
jbe@107:     lua_setfield(L, -2, "remote_tcpport");
jbe@107:   } else if (handle->addrfam == AF_INET) {
jbe@107:     struct sockaddr_in addr_in;
jbe@107:     char addrstrbuf[INET_ADDRSTRLEN];
jbe@107:     const char *addrstr;
jbe@107:     addrlen = sizeof(addr_in);
jbe@208:     if (getsockname(*fd, (struct sockaddr *)&addr_in, &addrlen)) {
jbe@107:       moonbr_io_errmsg();
jbe@107:       luaL_error(L, "Could not determine local IP address/port: %s", errmsg);
jbe@107:     }
jbe@107:     if (addrlen > sizeof(addr_in)) {
jbe@107:       luaL_error(L, "Could not determine local IP address/port: buffer size exceeded");
jbe@107:     }
jbe@107:     addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107:     if (!addrstr) {
jbe@107:       moonbr_io_errmsg();
jbe@107:       luaL_error(L, "Could not format local IP address: %s", errmsg);
jbe@107:     } else {
jbe@107:       lua_pushstring(L, addrstr);
jbe@107:       lua_setfield(L, -2, "local_ip4");
jbe@107:     }
jbe@107:     lua_pushinteger(L, ntohs(addr_in.sin_port));
jbe@107:     lua_setfield(L, -2, "local_tcpport");
jbe@208:     if (getpeername(*fd, (struct sockaddr *)&addr_in, &addrlen)) {
jbe@107:       moonbr_io_errmsg();
jbe@107:       luaL_error(L, "Could not determine remote IP address/port: %s", errmsg);
jbe@107:     }
jbe@107:     if (addrlen > sizeof(addr_in)) {
jbe@107:       luaL_error(L, "Could not determine remote IP address/port: buffer size exceeded");
jbe@107:     }
jbe@107:     addrstr = inet_ntop(AF_INET, &addr_in.sin_addr.s_addr, addrstrbuf, sizeof(addrstrbuf));
jbe@107:     if (!addrstr) {
jbe@107:       moonbr_io_errmsg();
jbe@107:       luaL_error(L, "Could not format remote IP address: %s", errmsg);
jbe@107:     } else {
jbe@107:       lua_pushstring(L, addrstr);
jbe@107:       lua_setfield(L, -2, "remote_ip4");
jbe@107:     }
jbe@107:     lua_pushinteger(L, ntohs(addr_in.sin_port));
jbe@107:     lua_setfield(L, -2, "remote_tcpport");
jbe@107:   }
jbe@238:   luaL_setmetatable(L, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79:   lua_setfield(L, -2, "public");
jbe@79:   lua_setuservalue(L, -2);
jbe@208:   handle->fd = *fd;
jbe@208:   *fd = -1;  /* closing is now handled by garbage collection */
jbe@208:   return 1;
jbe@208: }
jbe@208: 
jbe@208: void moonbr_io_pushhandle(lua_State *L, int fd) {
jbe@208:   lua_pushcfunction(L, moonbr_io_pushhandle_impl);
jbe@208:   lua_pushlightuserdata(L, &fd);
jbe@208:   if (lua_pcall(L, 1, 1, 0)) {
jbe@208:     if (fd != -1) close(fd);
jbe@208:     lua_error(L);
jbe@208:   }
jbe@79: }
jbe@79: 
jbe@79: static int moonbr_io_handleindex(lua_State *L) {
jbe@80:   luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@205:   luaL_checkany(L, 2);
jbe@79:   lua_getuservalue(L, 1);
jbe@79:   lua_getfield(L, -1, "public");
jbe@79:   lua_pushvalue(L, 2);
jbe@79:   lua_gettable(L, -2);
jbe@79:   return 1;
jbe@79: }
jbe@79: 
jbe@79: static int moonbr_io_handlenewindex(lua_State *L) {
jbe@80:   luaL_checkudata(L, 1, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@205:   luaL_checkany(L, 2);
jbe@205:   luaL_checkany(L, 3);
jbe@79:   lua_getuservalue(L, 1);
jbe@79:   lua_getfield(L, -1, "public");
jbe@79:   lua_pushvalue(L, 2);
jbe@79:   lua_pushvalue(L, 3);
jbe@79:   lua_settable(L, -3);
jbe@79:   return 0;
jbe@79: }
jbe@79: 
jbe@111: static int moonbr_io_localconnect_impl(lua_State *L, int nonblocking) {
jbe@111:   const char *path;
jbe@111:   struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };
jbe@111:   const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@111:     (void *)sockaddr.sun_path - (void *)&sockaddr
jbe@111:   ) - 1;  /* one byte for termination */
jbe@111:   int sock;
jbe@111:   path = luaL_checkstring(L, 1);
jbe@111:   if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);
jbe@111:   strcpy(sockaddr.sun_path, path);
jbe@111:   sock = socket(
jbe@111:     PF_LOCAL,
jbe@111:     SOCK_STREAM | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@111:     0
jbe@111:   );
jbe@111:   if (sock < 0) {
jbe@111:     moonbr_io_errmsg();
jbe@111:     lua_pushnil(L);
jbe@111:     lua_pushstring(L, errmsg);
jbe@111:     return 2;
jbe@111:   }
jbe@111:   if (connect(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
jbe@111:     if (!nonblocking && errno == EINTR) {
jbe@111:       moonbr_io_errmsg();
jbe@111:       close(sock);
jbe@111:       lua_pushnil(L);
jbe@111:       lua_pushstring(L, errmsg);
jbe@111:       return 2;
jbe@111:     } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@111:       moonbr_io_errmsg();
jbe@111:       lua_pushnil(L);
jbe@111:       lua_pushstring(L, errmsg);
jbe@111:       return 2;
jbe@111:     }
jbe@111:   }
jbe@111:   moonbr_io_pushhandle(L, sock);
jbe@111:   return 1;
jbe@111: }
jbe@111: 
jbe@111: static int moonbr_io_localconnect(lua_State *L) {
jbe@111:   return moonbr_io_localconnect_impl(L, 0);
jbe@111: }
jbe@111: 
jbe@111: static int moonbr_io_localconnect_nb(lua_State *L) {
jbe@111:   return moonbr_io_localconnect_impl(L, 1);
jbe@111: }
jbe@111: 
jbe@99: static int moonbr_io_tcpconnect_impl(lua_State *L, int nonblocking) {
jbe@98:   const char *host, *port;
jbe@98:   struct addrinfo hints = { 0, };
jbe@98:   struct addrinfo *res, *addrinfo;
jbe@98:   int errcode;
jbe@98:   int sock;
jbe@98:   host = luaL_checkstring(L, 1);
jbe@98:   port = luaL_checkstring(L, 2);
jbe@98:   hints.ai_family = AF_UNSPEC;
jbe@98:   hints.ai_socktype = SOCK_STREAM;
jbe@98:   hints.ai_protocol = IPPROTO_TCP;
jbe@98:   hints.ai_flags = AI_ADDRCONFIG;
jbe@98:   errcode = getaddrinfo(host, port, &hints, &res);
jbe@98:   if (errcode) {
jbe@102:     freeaddrinfo(res);
jbe@98:     if (errcode == EAI_SYSTEM) {
jbe@98:       moonbr_io_errmsg();
jbe@98:       lua_pushnil(L);
jbe@98:       lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@98:     } else {
jbe@98:       lua_pushnil(L);
jbe@98:       lua_pushstring(L, gai_strerror(errcode));
jbe@98:     }
jbe@98:     return 2;
jbe@98:   }
jbe@98:   for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134:     if (addrinfo->ai_family == AF_INET6) goto moonbr_io_tcpconnect_found;
jbe@98:   }
jbe@98:   for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134:     if (addrinfo->ai_family == AF_INET) goto moonbr_io_tcpconnect_found;
jbe@98:   }
jbe@98:   addrinfo = res;
jbe@98:   moonbr_io_tcpconnect_found:
jbe@99:   sock = socket(
jbe@134:     addrinfo->ai_family,  /* NOTE: not correctly using PF_* but AF_* constants here */
jbe@99:     addrinfo->ai_socktype | SOCK_CLOEXEC | (nonblocking ? SOCK_NONBLOCK : 0),
jbe@99:     addrinfo->ai_protocol
jbe@99:   );
jbe@98:   if (sock < 0) {
jbe@98:     moonbr_io_errmsg();
jbe@108:     freeaddrinfo(res);
jbe@98:     lua_pushnil(L);
jbe@98:     lua_pushstring(L, errmsg);
jbe@108:     return 2;
jbe@98:   }
jbe@98:   if (connect(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@108:     freeaddrinfo(res);
jbe@99:     if (!nonblocking && errno == EINTR) {
jbe@99:       moonbr_io_errmsg();
jbe@99:       close(sock);
jbe@99:       lua_pushnil(L);
jbe@99:       lua_pushstring(L, errmsg);
jbe@99:       return 2;
jbe@99:     } else if (!(nonblocking && (errno == EINPROGRESS || errno == EINTR))) {
jbe@99:       moonbr_io_errmsg();
jbe@99:       lua_pushnil(L);
jbe@99:       lua_pushstring(L, errmsg);
jbe@99:       return 2;
jbe@99:     }
jbe@108:   } else {
jbe@108:     freeaddrinfo(res);
jbe@98:   }
jbe@107:   moonbr_io_pushhandle(L, sock);
jbe@98:   return 1;
jbe@98: }
jbe@98: 
jbe@99: static int moonbr_io_tcpconnect(lua_State *L) {
jbe@99:   return moonbr_io_tcpconnect_impl(L, 0);
jbe@99: }
jbe@99: 
jbe@99: static int moonbr_io_tcpconnect_nb(lua_State *L) {
jbe@99:   return moonbr_io_tcpconnect_impl(L, 1);
jbe@99: }
jbe@99: 
jbe@112: static int moonbr_io_locallisten(lua_State *L) {
jbe@112:   moonbr_io_listener_t *listener;
jbe@112:   const char *path;
jbe@118:   struct stat sb;
jbe@112:   struct sockaddr_un sockaddr = { .sun_family = AF_LOCAL };
jbe@112:   const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@112:     (void *)sockaddr.sun_path - (void *)&sockaddr
jbe@112:   ) - 1;  /* one byte for termination */
jbe@112:   int sock;
jbe@112:   path = luaL_checkstring(L, 1);
jbe@112:   if (strlen(path) > path_maxlen) luaL_error(L, "Path too long; only %i characters allowed", path_maxlen);
jbe@112:   strcpy(sockaddr.sun_path, path);
jbe@118:   if (stat(path, &sb) == 0) {
jbe@118:     if (S_ISSOCK(sb.st_mode)) unlink(path);
jbe@118:   }
jbe@112:   listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));
jbe@117:   listener->fd = -1;
jbe@112:   luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@112:   sock = socket(
jbe@112:     PF_LOCAL,
jbe@112:     SOCK_STREAM | SOCK_CLOEXEC,
jbe@112:     0
jbe@112:   );
jbe@112:   if (sock < 0) {
jbe@112:     moonbr_io_errmsg();
jbe@112:     lua_pushnil(L);
jbe@112:     lua_pushstring(L, errmsg);
jbe@112:     return 2;
jbe@112:   }
jbe@112:   if (bind(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
jbe@112:     moonbr_io_errmsg();
jbe@112:     close(sock);
jbe@112:     lua_pushnil(L);
jbe@112:     lua_pushstring(L, errmsg);
jbe@112:     return 2;
jbe@112:   }
jbe@112:   if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {
jbe@112:     moonbr_io_errmsg();
jbe@112:     close(sock);
jbe@112:     lua_pushnil(L);
jbe@112:     lua_pushstring(L, errmsg);
jbe@112:     return 2;
jbe@112:   }
jbe@112:   listener->fd = sock;
jbe@118:   listener->addrfam = AF_LOCAL;
jbe@112:   listener->nonblocking = -1;
jbe@112:   return 1;
jbe@112: }
jbe@112: 
jbe@108: static int moonbr_io_tcplisten(lua_State *L) {
jbe@108:   moonbr_io_listener_t *listener;
jbe@108:   const char *host, *port;
jbe@108:   struct addrinfo hints = { 0, };
jbe@108:   struct addrinfo *res, *addrinfo;
jbe@108:   int errcode;
jbe@108:   int sock;
jbe@108:   host = luaL_optstring(L, 1, NULL);
jbe@108:   port = luaL_checkstring(L, 2);
jbe@108:   listener = lua_newuserdata(L, sizeof(moonbr_io_listener_t));
jbe@117:   listener->fd = -1;
jbe@108:   luaL_setmetatable(L, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108:   hints.ai_family = AF_UNSPEC;
jbe@108:   hints.ai_socktype = SOCK_STREAM;
jbe@108:   hints.ai_protocol = IPPROTO_TCP;
jbe@108:   hints.ai_flags = AI_ADDRCONFIG | AI_PASSIVE;
jbe@108:   errcode = getaddrinfo(host, port, &hints, &res);
jbe@108:   if (errcode) {
jbe@108:     freeaddrinfo(res);
jbe@108:     if (errcode == EAI_SYSTEM) {
jbe@108:       moonbr_io_errmsg();
jbe@108:       lua_pushnil(L);
jbe@108:       lua_pushfstring(L, "%s: %s", gai_strerror(errcode), errmsg);
jbe@108:     } else {
jbe@108:       lua_pushnil(L);
jbe@108:       lua_pushstring(L, gai_strerror(errcode));
jbe@108:     }
jbe@108:     return 2;
jbe@108:   }
jbe@108:   for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134:     if (addrinfo->ai_family == AF_INET6) goto moonbr_io_tcpconnect_found;
jbe@108:   }
jbe@108:   for (addrinfo=res; addrinfo; addrinfo=addrinfo->ai_next) {
jbe@134:     if (addrinfo->ai_family == AF_INET) goto moonbr_io_tcpconnect_found;
jbe@108:   }
jbe@108:   addrinfo = res;
jbe@108:   moonbr_io_tcpconnect_found:
jbe@118:   listener->addrfam = addrinfo->ai_family;
jbe@108:   sock = socket(
jbe@134:     addrinfo->ai_family,  /* NOTE: not correctly using PF_* but AF_* constants here */
jbe@108:     addrinfo->ai_socktype | SOCK_CLOEXEC,
jbe@108:     addrinfo->ai_protocol
jbe@108:   );
jbe@108:   if (sock < 0) {
jbe@108:     moonbr_io_errmsg();
jbe@108:     freeaddrinfo(res);
jbe@108:     lua_pushnil(L);
jbe@108:     lua_pushstring(L, errmsg);
jbe@108:     return 2;
jbe@108:   }
jbe@120:   {
jbe@120:     static const int reuseval = 1;
jbe@120:     if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &reuseval, sizeof(reuseval))) {
jbe@120:       moonbr_io_errmsg();
jbe@120:       freeaddrinfo(res);
jbe@120:       close(sock);
jbe@120:       lua_pushnil(L);
jbe@120:       lua_pushfstring(L, "Error while setting SO_REUSEADDR with setsockopt: %s", errmsg);
jbe@120:       return 2;
jbe@120:     }
jbe@120:   }
jbe@108:   if (bind(sock, addrinfo->ai_addr, addrinfo->ai_addrlen)) {
jbe@108:     moonbr_io_errmsg();
jbe@108:     freeaddrinfo(res);
jbe@108:     close(sock);
jbe@108:     lua_pushnil(L);
jbe@108:     lua_pushstring(L, errmsg);
jbe@108:     return 2;
jbe@108:   }
jbe@108:   freeaddrinfo(res);
jbe@108:   if (listen(sock, MOONBR_IO_LISTEN_BACKLOG)) {
jbe@108:     moonbr_io_errmsg();
jbe@108:     close(sock);
jbe@108:     lua_pushnil(L);
jbe@108:     lua_pushstring(L, errmsg);
jbe@108:     return 2;
jbe@108:   }
jbe@108:   listener->fd = sock;
jbe@108:   listener->nonblocking = -1;
jbe@108:   return 1;
jbe@108: }
jbe@108: 
jbe@108: static int moonbr_io_accept_impl(lua_State *L, int nonblocking) {
jbe@108:   moonbr_io_listener_t *listener;
jbe@108:   int fd;
jbe@108:   listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108:   if (listener->fd < 0) luaL_error(L, "Attempt to use a closed listener");
jbe@108:   if (listener->nonblocking != nonblocking) {
jbe@108:     int flags;
jbe@108:     flags = fcntl(listener->fd, F_GETFL, 0);
jbe@108:     if (flags == -1) {
jbe@108:       moonbr_io_errmsg();
jbe@108:       close(listener->fd);
jbe@108:       listener->fd = -1;
jbe@108:       luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@108:     }
jbe@108:     if (nonblocking) flags |= O_NONBLOCK;
jbe@108:     else flags &= ~O_NONBLOCK;
jbe@108:     if (fcntl(listener->fd, F_SETFL, flags) == -1) {
jbe@108:       moonbr_io_errmsg();
jbe@108:       close(listener->fd);
jbe@108:       listener->fd = -1;
jbe@108:       luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@108:     }
jbe@108:     listener->nonblocking = nonblocking;
jbe@108:   }
jbe@108:   while (1) {
jbe@214: #if defined(__linux__) && !defined(_GNU_SOURCE)
jbe@215:     fd = accept(listener->fd, NULL, NULL);
jbe@214:     if (fd != -1) {
jbe@214:       if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1) {
jbe@214:         moonbr_io_errmsg();
jbe@214:         close(listener->fd);
jbe@214:         listener->fd = -1;
jbe@214:         close(fd);
jbe@214:         luaL_error(L, "Unexpected error in fcntl call: %s", errmsg);
jbe@214:       }
jbe@214:     }
jbe@214: #else
jbe@108:     fd = accept4(listener->fd, NULL, NULL, SOCK_CLOEXEC);
jbe@214: #endif
jbe@108:     if (fd < 0) {
jbe@108:       if (nonblocking && (errno == EAGAIN || errno == EWOULDBLOCK)) {
jbe@108:         lua_pushboolean(L, 0);
jbe@108:         lua_pushliteral(L, "No incoming connection pending");
jbe@108:         return 2;
jbe@108:       } else if (errno != EINTR) {
jbe@108:         moonbr_io_errmsg();
jbe@108:         lua_pushnil(L);
jbe@108:         lua_pushstring(L, errmsg);
jbe@108:         return 2;
jbe@108:       }
jbe@108:     } else {
jbe@108:       moonbr_io_pushhandle(L, fd);
jbe@108:       return 1;
jbe@108:     }
jbe@108:   }
jbe@108: }
jbe@108: 
jbe@108: static int moonbr_io_accept(lua_State *L) {
jbe@108:   return moonbr_io_accept_impl(L, 0);
jbe@108: }
jbe@108: 
jbe@108: static int moonbr_io_accept_nb(lua_State *L) {
jbe@108:   return moonbr_io_accept_impl(L, 1);
jbe@108: }
jbe@108: 
jbe@108: static int moonbr_io_unlisten(lua_State *L) {
jbe@108:   moonbr_io_listener_t *listener;
jbe@118:   struct sockaddr_un addr;
jbe@118:   socklen_t addrlen;
jbe@118:   struct stat sb;
jbe@108:   listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108:   if (listener->fd < 0) luaL_error(L, "Attempt to close a closed listener");
jbe@118:   addrlen = sizeof(addr);
jbe@118:   if (getsockname(listener->fd, (struct sockaddr *)&addr, &addrlen)) addrlen = 0;
jbe@108:   if (close(listener->fd)) {
jbe@108:     moonbr_io_errmsg();
jbe@108:     listener->fd = -1;
jbe@118:     if (addrlen && addrlen <= sizeof(addr)) {
jbe@118:       if (stat(addr.sun_path, &sb) == 0) {
jbe@118:         if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);
jbe@118:       }
jbe@118:     }
jbe@108:     lua_pushnil(L);
jbe@108:     lua_pushstring(L, errmsg);
jbe@108:     return 2;
jbe@108:   }
jbe@108:   listener->fd = -1;
jbe@118:   if (addrlen && addrlen <= sizeof(addr)) {
jbe@118:     if (stat(addr.sun_path, &sb) == 0) {
jbe@118:       if (S_ISSOCK(sb.st_mode)) unlink(addr.sun_path);
jbe@118:     }
jbe@118:   }
jbe@108:   lua_pushboolean(L, 1);
jbe@108:   return 1;
jbe@108: }
jbe@108: 
jbe@108: static int moonbr_io_listenergc(lua_State *L) {
jbe@108:   moonbr_io_listener_t *listener;
jbe@108:   listener = luaL_checkudata(L, 1, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@117:   if (listener->fd >= 0) close(listener->fd);
jbe@108:   listener->fd = -1;
jbe@108:   return 0;
jbe@108: }
jbe@108: 
jbe@205: static int moonbr_io_exec(lua_State *L) {
jbe@205:   char **argv;
jbe@205:   int i, argc;
jbe@205:   int sockin[2], sockout[2], sockerr[2];
jbe@205:   volatile int errorcond = 0;
jbe@213:   volatile char errmsgbuf[MOONBR_IO_MAXSTRERRORLEN] = MOONBR_IO_STRERROR_R_MSG;
jbe@205:   moonbr_io_child_t *child;
jbe@205:   argc = lua_gettop(L);
jbe@205:   argv = lua_newuserdata(L, (argc + 1) * sizeof(char *));
jbe@205:   for (i=0; i<argc; i++) argv[i] = (char *)luaL_checkstring(L, i+1);
jbe@205:   argv[argc] = NULL;
jbe@208:   child = lua_newuserdata(L, sizeof(moonbr_io_child_t));
jbe@208:   child->pid = 0;
jbe@208:   lua_newtable(L);
jbe@208:   lua_setuservalue(L, -2);
jbe@238:   luaL_setmetatable(L, MOONBR_IO_CHILD_MT_REGKEY);
jbe@206:   if (socketpair(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0, sockin)) {
jbe@205:     moonbr_io_errmsg();
jbe@205:     lua_pushnil(L);
jbe@205:     lua_pushfstring(L, "Could not create socket pair: %s", errmsg);
jbe@205:     return 2;
jbe@205:   }
jbe@206:   if (socketpair(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0, sockout)) {
jbe@205:     moonbr_io_errmsg();
jbe@205:     close(sockin[0]);
jbe@205:     close(sockin[1]);
jbe@205:     lua_pushnil(L);
jbe@205:     lua_pushfstring(L, "Could not create socket pair: %s", errmsg);
jbe@205:     return 2;
jbe@205:   }
jbe@206:   if (socketpair(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0, sockerr)) {
jbe@205:     moonbr_io_errmsg();
jbe@205:     close(sockin[0]);
jbe@205:     close(sockin[1]);
jbe@205:     close(sockout[0]);
jbe@205:     close(sockout[1]);
jbe@205:     lua_pushnil(L);
jbe@205:     lua_pushfstring(L, "Could not create socket pair: %s", errmsg);
jbe@205:     return 2;
jbe@205:   }
jbe@205:   child->pid = vfork();
jbe@205:   if (child->pid == -1) {
jbe@205:     moonbr_io_errmsg();
jbe@205:     close(sockin[0]);
jbe@205:     close(sockin[1]);
jbe@205:     close(sockout[0]);
jbe@205:     close(sockout[1]);
jbe@205:     close(sockerr[0]);
jbe@205:     close(sockerr[1]);
jbe@205:     lua_pushnil(L);
jbe@205:     lua_pushfstring(L, "Could not fork: %s", errmsg);
jbe@205:     return 2;
jbe@205:   }
jbe@205:   if (!child->pid) {
jbe@208:     if (dup2(sockin[1], 0) == -1) goto moonbr_io_exec_error1;
jbe@208:     if (dup2(sockout[1], 1) == -1) goto moonbr_io_exec_error1;
jbe@208:     if (dup2(sockerr[1], 2) == -1) goto moonbr_io_exec_error1;
jbe@232:     closefrom(3);
jbe@208:     if (fcntl(0, F_SETFD, 0) == -1) goto moonbr_io_exec_error1;
jbe@208:     if (fcntl(1, F_SETFD, 0) == -1) goto moonbr_io_exec_error1;
jbe@208:     if (fcntl(2, F_SETFD, 0) == -1) goto moonbr_io_exec_error1;
jbe@205:     if (execvp(argv[0], argv)) {
jbe@205:       errorcond = 2;
jbe@205:       strerror_r(errno, (char *)errmsgbuf, MOONBR_IO_MAXSTRERRORLEN);
jbe@205:       _exit(0);
jbe@205:     }
jbe@208:     moonbr_io_exec_error1:
jbe@206:     errorcond = 1;
jbe@206:     strerror_r(errno, (char *)errmsgbuf, MOONBR_IO_MAXSTRERRORLEN);
jbe@206:     _exit(0);
jbe@205:   }
jbe@205:   close(sockin[1]);
jbe@205:   close(sockout[1]);
jbe@205:   close(sockerr[1]);
jbe@205:   if (errorcond) {
jbe@205:     int status;
jbe@205:     close(sockin[0]);
jbe@205:     close(sockout[0]);
jbe@205:     close(sockerr[0]);
jbe@205:     while (waitpid(child->pid, &status, 0) == -1) {
jbe@205:       if (errno != EINTR) {
jbe@205:         moonbr_io_errmsg();
jbe@205:         luaL_error(L, "Error in waitpid call after unsuccessful exec: %s", errmsg);
jbe@205:       }
jbe@205:     }
jbe@208:     child->pid = 0;
jbe@205:     lua_pushnil(L);
jbe@205:     if (errorcond == 2) lua_pushfstring(L, "Could not execute: %s", errmsgbuf);
jbe@205:     else lua_pushfstring(L, "Error in fork: %s", errmsgbuf);
jbe@205:     return 2;
jbe@205:   }
jbe@208:   lua_pushcfunction(L, moonbr_io_pushhandle_impl);
jbe@208:   lua_pushlightuserdata(L, &sockin[0]);
jbe@208:   if (lua_pcall(L, 1, 1, 0)) {
jbe@208:     if (sockin[0] != -1) close(sockin[0]);
jbe@208:     close(sockout[0]);
jbe@208:     close(sockerr[0]);
jbe@208:     goto moonbr_io_exec_error2;
jbe@208:   }
jbe@205:   lua_setfield(L, -2, "stdin");
jbe@208:   lua_pushcfunction(L, moonbr_io_pushhandle_impl);
jbe@208:   lua_pushlightuserdata(L, &sockout[0]);
jbe@208:   if (lua_pcall(L, 1, 1, 0)) {
jbe@208:     if (sockout[0] != -1) close(sockout[0]);
jbe@208:     close(sockerr[0]);
jbe@208:     goto moonbr_io_exec_error2;
jbe@208:   }
jbe@205:   lua_setfield(L, -2, "stdout");
jbe@208:   lua_pushcfunction(L, moonbr_io_pushhandle_impl);
jbe@208:   lua_pushlightuserdata(L, &sockerr[0]);
jbe@208:   if (lua_pcall(L, 1, 1, 0)) {
jbe@208:     if (sockerr[0] != -1) close(sockerr[0]);
jbe@208:     goto moonbr_io_exec_error2;
jbe@208:   }
jbe@205:   lua_setfield(L, -2, "stderr");
jbe@205:   return 1;
jbe@208:   moonbr_io_exec_error2:
jbe@208:   {
jbe@208:     int status;
jbe@208:     while (waitpid(child->pid, &status, 0) == -1) {
jbe@208:       if (errno != EINTR) {
jbe@208:         moonbr_io_errmsg();
jbe@208:         luaL_error(L, "Error in waitpid call after error creating socket handles: %s", errmsg);
jbe@208:       }
jbe@208:     }
jbe@208:   }
jbe@208:   child->pid = 0;
jbe@208:   return lua_error(L);
jbe@205: }
jbe@205: 
jbe@205: static int moonbr_io_childindex(lua_State *L) {
jbe@205:   luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205:   luaL_checkany(L, 2);
jbe@205:   lua_getuservalue(L, 1);
jbe@205:   lua_pushvalue(L, 2);
jbe@205:   lua_gettable(L, -2);
jbe@205:   if (lua_isnil(L, -1)) {
jbe@205:     luaL_getmetatable(L, MOONBR_IO_CHILD_PT_REGKEY);
jbe@205:     lua_pushvalue(L, 2);
jbe@205:     lua_gettable(L, -2);
jbe@205:   }
jbe@205:   return 1;
jbe@205: }
jbe@205: 
jbe@205: static int moonbr_io_childnewindex(lua_State *L) {
jbe@205:   luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205:   luaL_checkany(L, 2);
jbe@205:   luaL_checkany(L, 3);
jbe@205:   lua_getuservalue(L, 1);
jbe@205:   lua_pushvalue(L, 2);
jbe@205:   lua_pushvalue(L, 3);
jbe@205:   lua_settable(L, -3);
jbe@205:   return 0;
jbe@205: }
jbe@205: 
jbe@205: static int moonbr_io_childgc(lua_State *L) {
jbe@205:   moonbr_io_child_t *child;
jbe@205:   child = luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205:   if (child->pid) {
jbe@205:     int status;
jbe@205:     if (kill(child->pid, SIGKILL)) {
jbe@205:       moonbr_io_errmsg();
jbe@205:       luaL_error(L, "Error in kill call during garbage collection: %s", errmsg);
jbe@205:     }
jbe@205:     while (waitpid(child->pid, &status, 0) == -1) {
jbe@205:       if (errno != EINTR) {
jbe@205:         moonbr_io_errmsg();
jbe@205:         luaL_error(L, "Error in waitpid call during garbage collection: %s", errmsg);
jbe@205:       }
jbe@205:     }
jbe@205:   }
jbe@205:   return 0;
jbe@205: }
jbe@205: 
jbe@205: static int moonbr_io_kill(lua_State *L) {
jbe@205:   moonbr_io_child_t *child;
jbe@205:   int sig;
jbe@205:   child = luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205:   sig = luaL_optinteger(L, 2, SIGTERM);
jbe@205:   if (!child->pid) luaL_error(L, "Attempt to kill an already collected child process");
jbe@205:   if (kill(child->pid, sig)) {
jbe@205:     moonbr_io_errmsg();
jbe@205:     luaL_error(L, "Error in kill call: %s", errmsg);
jbe@205:   }
jbe@205:   lua_settop(L, 1);
jbe@205:   return 1;
jbe@205: }
jbe@205: 
jbe@205: static int moonbr_io_wait_impl(lua_State *L, int nonblocking) {
jbe@205:   moonbr_io_child_t *child;
jbe@205:   pid_t waitedpid;
jbe@205:   int status;
jbe@205:   child = luaL_checkudata(L, 1, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205:   if (!child->pid) luaL_error(L, "Attempt to wait for an already collected child process");
jbe@205:   while ((waitedpid = waitpid(child->pid, &status, nonblocking ? WNOHANG : 0)) == -1) {
jbe@205:     if (errno != EINTR) {
jbe@205:       moonbr_io_errmsg();
jbe@205:       luaL_error(L, "Error in waitpid call: %s", errmsg);
jbe@205:     }
jbe@205:   }
jbe@205:   if (!waitedpid) {
jbe@219:     lua_pushboolean(L, 0);
jbe@219:     lua_pushliteral(L, "Process is still running");
jbe@219:     return 2;
jbe@205:   } else {
jbe@205:     child->pid = 0;
jbe@205:     if (WIFEXITED(status)) {
jbe@205:       lua_pushinteger(L, WEXITSTATUS(status));
jbe@205:     } else if (WIFSIGNALED(status)) {
jbe@205:       lua_pushinteger(L, -WTERMSIG(status));
jbe@205:     } else {
jbe@205:       luaL_error(L, "Unexpected status value returned by waitpid call");
jbe@205:     }
jbe@219:     return 1;
jbe@205:   }
jbe@205: }
jbe@205: 
jbe@205: static int moonbr_io_wait(lua_State *L) {
jbe@205:   return moonbr_io_wait_impl(L, 0);
jbe@205: }
jbe@205: 
jbe@205: static int moonbr_io_wait_nb(lua_State *L) {
jbe@205:   return moonbr_io_wait_impl(L, 1);
jbe@205: }
jbe@205: 
jbe@205: #if LUA_VERSION_NUM >= 503
jbe@205: static int moonbr_io_wait_cont(lua_State *L, int status, lua_KContext ctx) {
jbe@205: #else
jbe@205: static int moonbr_io_wait_cont(lua_State *L) {
jbe@205: #endif
jbe@205: #if !(LUA_VERSION_NUM >= 503)
jbe@205:   int ctx = 0;
jbe@205:   lua_getctx(L, &ctx);
jbe@205: #endif
jbe@205:   while (1) {
jbe@205:     lua_pushcfunction(L, moonbr_io_wait_nb);
jbe@205:     lua_pushvalue(L, 1);
jbe@205:     lua_call(L, 1, 1);
jbe@205:     if (!lua_isnil(L, -1)) break;
jbe@205:     lua_pushvalue(L, 2);
jbe@205:     lua_callk(L, 0, 0, ctx, moonbr_io_wait_cont);
jbe@205:   }
jbe@205:   return 1;
jbe@205: }
jbe@205: 
jbe@205: static int moonbr_io_wait_call(lua_State *L) {
jbe@205:   lua_settop(L, 2);
jbe@205: #if LUA_VERSION_NUM >= 503
jbe@205:   return moonbr_io_wait_cont(L, 0, 0);
jbe@205: #else
jbe@205:   return moonbr_io_wait_cont(L);
jbe@205: #endif
jbe@205: }
jbe@205: 
jbe@205: moonbr_io_yield_wrapper(moonbr_io_wait_yield, moonbr_io_wait_call);
jbe@205: 
jbe@106: static int moonbr_io_poll(lua_State *L) {
jbe@106:   moonbr_io_handle_t *handle;
jbe@108:   moonbr_io_listener_t *listener;
jbe@106:   int fd, isnum;
jbe@106:   int nfds = 0;
jbe@106:   fd_set readfds, writefds, exceptfds;
jbe@106:   struct timeval timeout = {0, };
jbe@106:   int status;
jbe@106:   FD_ZERO(&readfds);
jbe@106:   FD_ZERO(&writefds);
jbe@106:   FD_ZERO(&exceptfds);
jbe@106:   if (!lua_isnoneornil(L, 1)) {
jbe@106:     luaL_checktype(L, 1, LUA_TTABLE);
jbe@106:     for (lua_pushnil(L); lua_next(L, 1); lua_pop(L, 1)) {
jbe@106:       if (lua_toboolean(L, -1)) {
jbe@106:         handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@106:         if (handle) {
jbe@109:           if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");
jbe@106:           fd = handle->fd;
jbe@122:           if (
jbe@122:             fd < 0 ||  /* fake EOF to simulate shutdown if fd < 0 */
jbe@122:             handle->readbufin != handle->readbufout  /* data pending in buffer */
jbe@122:           ) {
jbe@109:             lua_pushboolean(L, 1);
jbe@109:             return 1;
jbe@109:           }
jbe@106:         } else {
jbe@108:           listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108:           if (listener) {
jbe@108:             fd = listener->fd;
jbe@108:             if (fd < 0) luaL_error(L, "Attempt to poll a closed listener");
jbe@108:           } else {
jbe@108:             fd = lua_tointegerx(L, -2, &isnum);
jbe@108:             if (!isnum) luaL_error(L, "Expected integer (file descriptor), I/O handle, or listener in table key");
jbe@108:           }
jbe@106:         }
jbe@138:         if (fd < 0 || fd >= FD_SETSIZE) luaL_error(L, "File descriptor out of valid range");
jbe@106:         FD_SET(fd, &readfds);
jbe@106:         if (fd+1 > nfds) nfds = fd+1;
jbe@106:       }
jbe@106:     }
jbe@106:   }
jbe@106:   if (!lua_isnoneornil(L, 2)) {
jbe@106:     luaL_checktype(L, 2, LUA_TTABLE);
jbe@106:     for (lua_pushnil(L); lua_next(L, 2); lua_pop(L, 1)) {
jbe@106:       if (lua_toboolean(L, -1)) {
jbe@106:         handle = luaL_testudata(L, -2, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@106:         if (handle) {
jbe@109:           if (handle->closed) luaL_error(L, "Attempt to poll a closed connection");
jbe@109:           if (handle->finished) luaL_error(L, "Attempt to write-poll a finished connection");
jbe@106:           fd = handle->fd;
jbe@106:         } else {
jbe@108:           listener = luaL_testudata(L, -2, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@109:           if (listener) luaL_error(L, "Attempt to write-poll a listener");
jbe@109:           fd = lua_tointegerx(L, -2, &isnum);
jbe@109:           if (!isnum) luaL_error(L, "Expected integer (file descriptor) or I/O handle in table key");
jbe@106:         }
jbe@138:         if (fd < 0 || fd >= FD_SETSIZE) luaL_error(L, "File descriptor out of valid range");
jbe@106:         FD_SET(fd, &writefds);
jbe@106:         if (fd+1 > nfds) nfds = fd+1;
jbe@106:       }
jbe@106:     }
jbe@106:   }
jbe@106:   if (!lua_isnoneornil(L, 3)) {
jbe@106:     lua_Number n;
jbe@106:     n = lua_tonumberx(L, 3, &isnum);
jbe@146:     if (isnum && n<0) {
jbe@146:       lua_pushboolean(L, 0);
jbe@146:       lua_pushliteral(L, "Negative timeout");
jbe@146:       return 2;
jbe@146:     } else if (isnum && n>=0 && n<100000000) {
jbe@106:       timeout.tv_sec = n;
jbe@106:       timeout.tv_usec = 1e6 * (n - timeout.tv_sec);
jbe@106:     } else {
jbe@106:       luaL_argcheck(L, 0, 3, "not a valid timeout");
jbe@106:     }
jbe@106:     status = select(nfds, &readfds, &writefds, &exceptfds, &timeout);
jbe@106:   } else {
jbe@106:     status = select(nfds, &readfds, &writefds, &exceptfds, NULL);
jbe@106:   }
jbe@106:   if (status == -1) {
jbe@106:     if (errno == EINTR) {
jbe@146:       lua_pushnil(L);
jbe@106:       lua_pushliteral(L, "Signal received while polling file descriptors");
jbe@106:       return 2;
jbe@106:     } else {
jbe@106:       moonbr_io_errmsg();
jbe@106:       return luaL_error(L, "Unexpected error during \"select\" system call: %s", errmsg);
jbe@106:     }
jbe@106:   } else if (status == 0) {
jbe@106:     lua_pushboolean(L, 0);
jbe@106:     lua_pushliteral(L, "Timeout while polling file descriptors");
jbe@106:     return 2;
jbe@106:   } else {
jbe@106:     lua_pushboolean(L, 1);
jbe@106:     return 1;
jbe@106:   }
jbe@106: }
jbe@106: 
jbe@115: static int moonbr_io_timeref(lua_State *L) {
jbe@115:   lua_Number sub;
jbe@115:   struct timespec tp;
jbe@115:   sub = luaL_optnumber(L, 1, 0);
jbe@115:   if (clock_gettime(CLOCK_MONOTONIC, &tp)) {
jbe@115:     return luaL_error(L, "Could not access CLOCK_MONOTONIC");
jbe@115:   }
jbe@115:   lua_pushnumber(L, tp.tv_sec + tp.tv_nsec / 1.0e9 - sub);
jbe@115:   return 1;
jbe@115: }
jbe@115: 
jbe@243: #ifdef MOONBR_IO_USE_TLS
jbe@243: 
jbe@243: #define moonbr_io_tlsconf_string(name, field, func) \
jbe@243:   /* NOTE: use valuetype = lua_getfield(...) for LUA_VERSION_NUM >= 503 */ \
jbe@243:   lua_getfield(L, 1, (field)); \
jbe@243:   valuetype = lua_type(L, -1); \
jbe@243:   if (valuetype != LUA_TNIL) { \
jbe@243:     luaL_argcheck(L, valuetype == LUA_TSTRING, 1, "field \"" field "\" is not a string"); \
jbe@243:     value = lua_tostring(L, -1); \
jbe@243:     if (func(tlsconf, value)) { \
jbe@243:       lua_pushnil(L); \
jbe@243:       lua_pushfstring(L, "Could not set " name " \"%s\"", value); \
jbe@243:       return 2; \
jbe@243:     } \
jbe@243:   } \
jbe@243:   lua_pop(L, 1);
jbe@243: 
jbe@243: #define moonbr_io_tlsconf_binary(name, field, func) \
jbe@243:   /* NOTE: use valuetype = lua_getfield(...) for LUA_VERSION_NUM >= 503 */ \
jbe@243:   lua_getfield(L, 1, (field)); \
jbe@243:   valuetype = lua_type(L, -1); \
jbe@243:   if (valuetype != LUA_TNIL) { \
jbe@243:     luaL_argcheck(L, valuetype == LUA_TSTRING, 1, "field \"" field "\" is not a string"); \
jbe@243:     value = lua_tolstring(L, -1, &valuelen); \
jbe@243:     if (func(tlsconf, (void *)value, valuelen)) { \
jbe@243:       lua_pushnil(L); \
jbe@243:       lua_pushliteral(L, "Could not set " name); \
jbe@243:       return 2; \
jbe@243:     } \
jbe@243:   } \
jbe@243:   lua_pop(L, 1);
jbe@243: 
jbe@243: static int moonbr_io_tlsconf(lua_State *L) {
jbe@243:   struct tls_config *tlsconf;
jbe@243:   int valuetype;
jbe@243:   const char *value;
jbe@243:   size_t valuelen;
jbe@243:   luaL_checktype(L, 1, LUA_TTABLE);
jbe@243:   tlsconf = tls_config_new();
jbe@243:   if (!tlsconf) {
jbe@243:     return luaL_error(L, "Could not allocate memory for TLS configuration");
jbe@243:   }
jbe@243:   lua_pushlightuserdata(L, tlsconf);
jbe@243:   luaL_setmetatable(L, MOONBR_IO_TLSCONF_MT_REGKEY);
jbe@243:   lua_pushvalue(L, 1);
jbe@243:   lua_setuservalue(L, -2);
jbe@245: #if LUA_VERSION_NUM >= 503
jbe@245:   if (lua_getfield(L, 1, "mode") == LUA_TSTRING) value = lua_tostring(L, -1);
jbe@245: #else
jbe@245:   lua_getfield(L, 1, "mode");
jbe@245:   if (lua_type(L, -1) == LUA_TSTRING) value = lua_tostring(L, -1);
jbe@245: #endif
jbe@245:   else value = "";
jbe@245:   if (strcmp(value, "server") && strcmp(value, "client")) {
jbe@245:     luaL_argcheck(L, 0, 1, "field \"mode\" must be set to \"server\" or \"client\"");
jbe@245:   }
jbe@245:   lua_pop(L, 1);
jbe@243:   moonbr_io_tlsconf_string("CA file",          "ca_file",   tls_config_set_ca_file);
jbe@243:   moonbr_io_tlsconf_string("CA path",          "ca_path",   tls_config_set_ca_path);
jbe@243:   moonbr_io_tlsconf_binary("CA",               "ca_mem",    tls_config_set_ca_mem);
jbe@243:   moonbr_io_tlsconf_string("certificate file", "cert_file", tls_config_set_cert_file);
jbe@243:   moonbr_io_tlsconf_binary("certificate",      "cert_mem",  tls_config_set_cert_mem);
jbe@243:   moonbr_io_tlsconf_string("key file",         "key_file",  tls_config_set_key_file);
jbe@243:   moonbr_io_tlsconf_binary("key",              "key_mem",   tls_config_set_key_mem);
jbe@245: #if LUA_VERSION_NUM >= 503
jbe@245:   valuetype = lua_getfield(L, 1, "verify_client");
jbe@245: #else
jbe@244:   lua_getfield(L, 1, "verify_client");
jbe@245: #endif
jbe@244:   if (lua_toboolean(L, -1)) {
jbe@245: #if LUA_VERSION_NUM >= 503
jbe@245:     if (valuetype == LUA_TSTRING) value = lua_tostring(L, -1);
jbe@245: #else
jbe@244:     if (lua_type(L, -1) == LUA_TSTRING) value = lua_tostring(L, -1);
jbe@245: #endif
jbe@244:     else value = "";
jbe@244:     if (!strcmp(value, "required")) {
jbe@244:       tls_config_verify_client(tlsconf);
jbe@244:     } else if (!strcmp(value, "optional")) {
jbe@244:       tls_config_verify_client_optional(tlsconf);
jbe@244:     } else {
jbe@244:       luaL_argcheck(L, 0, 1, "field \"verify_client\" must be set to \"required\", \"optional\", or be false or nil");
jbe@244:     }
jbe@244:   }
jbe@244:   lua_pop(L, 1);
jbe@243:   return 1;
jbe@243: }
jbe@243: 
jbe@243: static int moonbr_io_tlsconfindex(lua_State *L) {
jbe@243:   struct tls_config *tlsconf;
jbe@243:   tlsconf = luaL_checkudata(L, 1, MOONBR_IO_TLSCONF_MT_REGKEY);
jbe@243:   luaL_checkany(L, 2);
jbe@243: #if LUA_VERSION_NUM >= 503
jbe@243:   if (lua_getuservalue(L, 1) == LUA_TNIL) {
jbe@243: #else
jbe@243:   lua_getuservalue(L, 1);
jbe@243:   if (lua_isnil(L, -1)) {
jbe@243: #endif
jbe@243:     return luaL_error(L, "Attempt to use a destroyed TLS configuration");
jbe@243:   }
jbe@243:   lua_pushvalue(L, 2);
jbe@243:   lua_gettable(L, -2);
jbe@243:   return 1;
jbe@243: }
jbe@243: 
jbe@243: static int moonbr_io_tlsconfgc(lua_State *L) {
jbe@243:   struct tls_config *tlsconf;
jbe@243:   tlsconf = luaL_checkudata(L, 1, MOONBR_IO_TLSCONF_MT_REGKEY);
jbe@243: #if LUA_VERSION_NUM >= 503
jbe@243:   if (lua_getuservalue(L, 1) == LUA_TNIL) return 0;
jbe@243: #else
jbe@243:   lua_getuservalue(L, 1);
jbe@243:   if (lua_isnil(L, -1)) return 0;
jbe@243: #endif
jbe@243:   tls_config_free(tlsconf);
jbe@243:   lua_pushnil(L);
jbe@243:   lua_setuservalue(L, 1);
jbe@243:   return 0;
jbe@243: }
jbe@243: 
jbe@243: #endif
jbe@243: 
jbe@79: static const struct luaL_Reg moonbr_io_handle_methods[] = {
jbe@85:   {"read", moonbr_io_read},
jbe@85:   {"read_nb", moonbr_io_read_nb},
jbe@140:   {"read_call", moonbr_io_read_call},
jbe@140:   {"read_yield", moonbr_io_read_yield},
jbe@86:   {"drain", moonbr_io_drain},
jbe@86:   {"drain_nb", moonbr_io_drain_nb},
jbe@144:   {"drain_call", moonbr_io_drain_call},
jbe@144:   {"drain_yield", moonbr_io_drain_yield},
jbe@80:   {"write", moonbr_io_write},
jbe@81:   {"write_nb", moonbr_io_write_nb},
jbe@145:   {"write_call", moonbr_io_write_call},
jbe@145:   {"write_yield", moonbr_io_write_yield},
jbe@80:   {"flush", moonbr_io_flush},
jbe@81:   {"flush_nb", moonbr_io_flush_nb},
jbe@145:   {"flush_call", moonbr_io_flush_call},
jbe@145:   {"flush_yield", moonbr_io_flush_yield},
jbe@88:   {"finish", moonbr_io_finish},
jbe@87:   {"close", moonbr_io_close},
jbe@85:   {"reset", moonbr_io_reset},
jbe@79:   {NULL, NULL}
jbe@79: };
jbe@79: 
jbe@79: static const struct luaL_Reg moonbr_io_handle_metamethods[] = {
jbe@79:   {"__index", moonbr_io_handleindex},
jbe@79:   {"__newindex", moonbr_io_handlenewindex},
jbe@108:   {"__gc", moonbr_io_handlegc},
jbe@108:   {NULL, NULL}
jbe@108: };
jbe@108: 
jbe@108: static const struct luaL_Reg moonbr_io_listener_methods[] = {
jbe@108:   {"accept", moonbr_io_accept},
jbe@108:   {"accept_nb", moonbr_io_accept_nb},
jbe@108:   {"close", moonbr_io_unlisten},
jbe@108:   {NULL, NULL}
jbe@108: };
jbe@108: 
jbe@108: static const struct luaL_Reg moonbr_io_listener_metamethods[] = {
jbe@108:   {"__gc", moonbr_io_listenergc},
jbe@79:   {NULL, NULL}
jbe@79: };
jbe@79: 
jbe@205: static const struct luaL_Reg moonbr_io_child_methods[] = {
jbe@205:   {"kill", moonbr_io_kill},
jbe@205:   {"wait", moonbr_io_wait},
jbe@205:   {"wait_nb", moonbr_io_wait_nb},
jbe@205:   {"wait_call", moonbr_io_wait_call},
jbe@205:   {"wait_yield", moonbr_io_wait_yield},
jbe@205:   {NULL, NULL}
jbe@205: };
jbe@205: 
jbe@205: static const struct luaL_Reg moonbr_io_child_metamethods[] = {
jbe@205:   {"__index", moonbr_io_childindex},
jbe@205:   {"__newindex", moonbr_io_childnewindex},
jbe@205:   {"__gc", moonbr_io_childgc},
jbe@205:   {NULL, NULL}
jbe@205: };
jbe@205: 
jbe@79: static const struct luaL_Reg moonbr_io_module_funcs[] = {
jbe@111:   {"localconnect", moonbr_io_localconnect},
jbe@111:   {"localconnect_nb", moonbr_io_localconnect_nb},
jbe@98:   {"tcpconnect", moonbr_io_tcpconnect},
jbe@99:   {"tcpconnect_nb", moonbr_io_tcpconnect_nb},
jbe@112:   {"locallisten", moonbr_io_locallisten},
jbe@108:   {"tcplisten", moonbr_io_tcplisten},
jbe@205:   {"exec", moonbr_io_exec},
jbe@106:   {"poll", moonbr_io_poll},
jbe@115:   {"timeref", moonbr_io_timeref},
jbe@243: #ifdef MOONBR_IO_USE_TLS
jbe@243:   {"tlsconf", moonbr_io_tlsconf},
jbe@243: #endif
jbe@79:   {NULL, NULL}
jbe@79: };
jbe@79: 
jbe@243: #ifdef MOONBR_IO_USE_TLS
jbe@243: static const struct luaL_Reg moonbr_io_tlsconf_metamethods[] = {
jbe@243:   {"__index", moonbr_io_tlsconfindex},
jbe@243:   {"__gc", moonbr_io_tlsconfgc},
jbe@243:   {NULL, NULL}
jbe@243: };
jbe@243: #endif
jbe@243: 
jbe@79: int luaopen_moonbridge_io(lua_State *L) {
jbe@79: 
jbe@113:   signal(SIGPIPE, SIG_IGN);  /* generate I/O errors instead of signal 13 */
jbe@113: 
jbe@80:   lua_newtable(L);  // module
jbe@80: 
jbe@79:   lua_newtable(L);  // public metatable
jbe@79:   lua_newtable(L);  // handle methods
jbe@79:   luaL_setfuncs(L, moonbr_io_handle_methods, 0);
jbe@80:   lua_pushvalue(L, -1);
jbe@146:   lua_setfield(L, -4, "handle_pt");
jbe@79:   lua_setfield(L, -2, "__index");
jbe@79:   lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_PUBLIC_MT_REGKEY);
jbe@79: 
jbe@79:   lua_newtable(L);  // handle metatable
jbe@79:   luaL_setfuncs(L, moonbr_io_handle_metamethods, 0);
jbe@146:   lua_pushvalue(L, -1);
jbe@146:   lua_setfield(L, -3, "handle_mt");
jbe@79:   lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_HANDLE_MT_REGKEY);
jbe@79: 
jbe@108:   lua_newtable(L);  // listener metatable
jbe@108:   luaL_setfuncs(L, moonbr_io_listener_metamethods, 0);
jbe@108:   lua_newtable(L);  // listener methods
jbe@108:   luaL_setfuncs(L, moonbr_io_listener_methods, 0);
jbe@108:   lua_pushvalue(L, -1);
jbe@146:   lua_setfield(L, -4, "listener_pt");
jbe@108:   lua_setfield(L, -2, "__index");
jbe@146:   lua_pushvalue(L, -1);
jbe@146:   lua_setfield(L, -3, "listener_mt");
jbe@108:   lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_LISTENER_MT_REGKEY);
jbe@108: 
jbe@205:   lua_newtable(L);  // child methods
jbe@205:   luaL_setfuncs(L, moonbr_io_child_methods, 0);
jbe@205:   lua_pushvalue(L, -1);
jbe@205:   lua_setfield(L, -3, "child_pt");
jbe@205:   lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_CHILD_PT_REGKEY);
jbe@205:   lua_newtable(L);  // child metatable
jbe@205:   luaL_setfuncs(L, moonbr_io_child_metamethods, 0);
jbe@205:   lua_pushvalue(L, -1);
jbe@205:   lua_setfield(L, -3, "child_mt");
jbe@205:   lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_CHILD_MT_REGKEY);
jbe@205: 
jbe@243: #ifdef MOONBR_IO_USE_TLS
jbe@243:   if(tls_init()) {
jbe@243:     return luaL_error(L, "Could not initialize TLS library");
jbe@243:   }
jbe@243:   lua_newtable(L);  // tlsconf metatable
jbe@243:   luaL_setfuncs(L, moonbr_io_tlsconf_metamethods, 0);
jbe@243:   lua_pushvalue(L, -1);
jbe@243:   lua_setfield(L, -3, "tlsconf_mt");
jbe@243:   lua_setfield(L, LUA_REGISTRYINDEX, MOONBR_IO_TLSCONF_MT_REGKEY);
jbe@243: #endif
jbe@243: 
jbe@205:   moonbr_io_pushhandle(L, 0);
jbe@205:   lua_setfield(L, -2, "stdin");
jbe@205:   moonbr_io_pushhandle(L, 1);
jbe@205:   lua_setfield(L, -2, "stdout");
jbe@205:   moonbr_io_pushhandle(L, 2);
jbe@205:   lua_setfield(L, -2, "stderr");
jbe@205:   
jbe@79:   luaL_setfuncs(L, moonbr_io_module_funcs, 0);
jbe@79:   return 1;
jbe@79: 
jbe@79: }
jbe@79: