-/*
- * nixio - Linux I/O library for lua
- *
- * Copyright (C) 2009 Steven Barth <steven@midlink.org>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "nixio.h"
-#include <stdio.h>
-#include <string.h>
-#include <errno.h>
-#include <signal.h>
-
-#define VERSION 0.4
-
-
-/* pushes nil, error number and errstring on the stack */
-int nixio__perror(lua_State *L) {
- if (errno == EAGAIN || errno == EWOULDBLOCK) {
- lua_pushboolean(L, 0);
- } else {
- lua_pushnil(L);
- }
- lua_pushinteger(L, errno);
- lua_pushstring(L, strerror(errno));
- return 3;
-}
-
-/* pushes true, if operation succeeded, otherwise call nixio__perror */
-int nixio__pstatus(lua_State *L, int condition) {
- if (condition) {
- lua_pushboolean(L, 1);
- return 1;
- } else {
- return nixio__perror(L);
- }
-}
-
-/* checks whether the first argument is a socket and returns it */
-nixio_sock* nixio__checksock(lua_State *L) {
- nixio_sock *sock = (nixio_sock*)luaL_checkudata(L, 1, NIXIO_META);
- luaL_argcheck(L, sock->fd != -1, 1, "invalid socket object");
- return sock;
-}
-
-/* read fd from nixio_sock object */
-int nixio__checksockfd(lua_State *L) {
- return nixio__checksock(L)->fd;
-}
-
-/* return any possible fd, otherwise error out */
-int nixio__checkfd(lua_State *L, int ud) {
- int fd = nixio__tofd(L, ud);
- return (fd != -1) ? fd : luaL_argerror(L, ud, "invalid file descriptor");
-}
-
-/* return any possible fd */
-int nixio__tofd(lua_State *L, int ud) {
- void *udata = lua_touserdata(L, ud);
- int fd = -1;
- if (lua_getmetatable(L, ud)) {
- luaL_getmetatable(L, NIXIO_META);
- luaL_getmetatable(L, NIXIO_FILE_META);
- luaL_getmetatable(L, LUA_FILEHANDLE);
- if (lua_rawequal(L, -3, -4)) {
- fd = ((nixio_sock*)udata)->fd;
- } else if (lua_rawequal(L, -2, -4)) {
- fd = *((int*)udata);
- } else if (lua_rawequal(L, -1, -4)) {
- fd = (*((FILE **)udata)) ? fileno(*((FILE **)udata)) : -1;
- }
- lua_pop(L, 4);
- }
- return fd;
-}
-
-/* An empty iterator */
-int nixio__nulliter(lua_State *L) {
- lua_pushnil(L);
- return 1;
-}
-
-static int nixio_errno(lua_State *L) {
- lua_pushinteger(L, errno);
- return 1;
-}
-
-static int nixio_strerror(lua_State *L) {
- lua_pushstring(L, strerror(luaL_checkinteger(L, 1)));
- return 1;
-}
-
-/* object table */
-static const luaL_reg R[] = {
- {"errno", nixio_errno},
- {"strerror", nixio_strerror},
- {NULL, NULL}
-};
-
-/* entry point */
-NIXIO_API int luaopen_nixio(lua_State *L) {
- /* create metatable */
- luaL_newmetatable(L, NIXIO_META);
-
- /* metatable.__index = metatable */
- lua_pushvalue(L, -1);
- lua_setfield(L, -2, "__index");
-
- /* register module */
- luaL_register(L, "nixio", R);
-
- /* register metatable as socket_meta */
- lua_pushvalue(L, -2);
- lua_setfield(L, -2, "meta_socket");
-
- /* register methods */
-#ifdef __WINNT__
- nixio_open__mingw(L);
-#endif
- nixio_open_file(L);
- nixio_open_socket(L);
- nixio_open_sockopt(L);
- nixio_open_bind(L);
- nixio_open_address(L);
- nixio_open_protoent(L);
- nixio_open_poll(L);
- nixio_open_io(L);
- nixio_open_splice(L);
- nixio_open_process(L);
- nixio_open_syslog(L);
- nixio_open_bit(L);
- nixio_open_bin(L);
- nixio_open_fs(L);
- nixio_open_user(L);
-
-#ifndef NO_TLS
- nixio_open_tls_crypto(L);
- nixio_open_tls_context(L);
- nixio_open_tls_socket(L);
-#endif
-
- /* module version */
- lua_pushinteger(L, VERSION);
- lua_setfield(L, -2, "version");
-
- /* some constants */
- lua_newtable(L);
-
- lua_pushliteral(L, NIXIO_SEP);
- lua_setfield(L, -2, "sep");
-
- lua_pushliteral(L, NIXIO_PATHSEP);
- lua_setfield(L, -2, "pathsep");
-
- lua_pushinteger(L, NIXIO_BUFFERSIZE);
- lua_setfield(L, -2, "buffersize");
-
- NIXIO_PUSH_CONSTANT(EACCES);
- NIXIO_PUSH_CONSTANT(EINTR);
- NIXIO_PUSH_CONSTANT(ENOSYS);
- NIXIO_PUSH_CONSTANT(EINVAL);
- NIXIO_PUSH_CONSTANT(EAGAIN);
- NIXIO_PUSH_CONSTANT(ENOMEM);
- NIXIO_PUSH_CONSTANT(ENOENT);
- NIXIO_PUSH_CONSTANT(ECHILD);
- NIXIO_PUSH_CONSTANT(EIO);
- NIXIO_PUSH_CONSTANT(EBADF);
- NIXIO_PUSH_CONSTANT(EFAULT);
- NIXIO_PUSH_CONSTANT(EFBIG);
- NIXIO_PUSH_CONSTANT(ENOSPC);
- NIXIO_PUSH_CONSTANT(EPIPE);
- NIXIO_PUSH_CONSTANT(ESPIPE);
- NIXIO_PUSH_CONSTANT(EISDIR);
- NIXIO_PUSH_CONSTANT(EPERM);
- NIXIO_PUSH_CONSTANT(EEXIST);
- NIXIO_PUSH_CONSTANT(EMFILE);
- NIXIO_PUSH_CONSTANT(ENAMETOOLONG);
- NIXIO_PUSH_CONSTANT(ENFILE);
- NIXIO_PUSH_CONSTANT(ENODEV);
- NIXIO_PUSH_CONSTANT(EXDEV);
- NIXIO_PUSH_CONSTANT(ENOTDIR);
- NIXIO_PUSH_CONSTANT(ENXIO);
- NIXIO_PUSH_CONSTANT(EROFS);
- NIXIO_PUSH_CONSTANT(EBUSY);
- NIXIO_PUSH_CONSTANT(ESRCH);
- NIXIO_PUSH_CONSTANT(SIGINT);
- NIXIO_PUSH_CONSTANT(SIGTERM);
- NIXIO_PUSH_CONSTANT(SIGSEGV);
-
-#ifndef __WINNT__
- NIXIO_PUSH_CONSTANT(EALREADY);
- NIXIO_PUSH_CONSTANT(EINPROGRESS);
- NIXIO_PUSH_CONSTANT(EWOULDBLOCK);
- NIXIO_PUSH_CONSTANT(ELOOP);
- NIXIO_PUSH_CONSTANT(EOVERFLOW);
- NIXIO_PUSH_CONSTANT(ETXTBSY);
- NIXIO_PUSH_CONSTANT(EAFNOSUPPORT);
- NIXIO_PUSH_CONSTANT(ENOBUFS);
- NIXIO_PUSH_CONSTANT(EPROTONOSUPPORT);
- NIXIO_PUSH_CONSTANT(ENOPROTOOPT);
- NIXIO_PUSH_CONSTANT(EADDRINUSE);
- NIXIO_PUSH_CONSTANT(ENETDOWN);
- NIXIO_PUSH_CONSTANT(ENETUNREACH);
-
- NIXIO_PUSH_CONSTANT(SIGALRM);
- NIXIO_PUSH_CONSTANT(SIGKILL);
- NIXIO_PUSH_CONSTANT(SIGHUP);
- NIXIO_PUSH_CONSTANT(SIGSTOP);
- NIXIO_PUSH_CONSTANT(SIGCONT);
- NIXIO_PUSH_CONSTANT(SIGCHLD);
- NIXIO_PUSH_CONSTANT(SIGQUIT);
- NIXIO_PUSH_CONSTANT(SIGUSR1);
- NIXIO_PUSH_CONSTANT(SIGUSR2);
- NIXIO_PUSH_CONSTANT(SIGIO);
- NIXIO_PUSH_CONSTANT(SIGURG);
- NIXIO_PUSH_CONSTANT(SIGPIPE);
-
- lua_pushvalue(L, -1);
- lua_setfield(L, -3, "const_sock");
-
- signal(SIGPIPE, SIG_IGN);
-#endif /* !__WINNT__ */
- lua_setfield(L, -2, "const");
-
- /* remove meta table */
- lua_remove(L, -2);
-
- return 1;
-}
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