2 * nixio - Linux I/O library for lua
4 * Copyright (C) 2009 Steven Barth <steven@midlink.org>
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
28 /* pushes nil, error number and errstring on the stack */
29 int nixio__perror(lua_State *L) {
30 if (errno == EAGAIN || errno == EWOULDBLOCK) {
31 lua_pushboolean(L, 0);
35 lua_pushinteger(L, errno);
36 lua_pushstring(L, strerror(errno));
40 /* pushes true, if operation succeeded, otherwise call nixio__perror */
41 int nixio__pstatus(lua_State *L, int condition) {
43 lua_pushboolean(L, 1);
46 return nixio__perror(L);
50 /* checks whether the first argument is a socket and returns it */
51 nixio_sock* nixio__checksock(lua_State *L) {
52 nixio_sock *sock = (nixio_sock*)luaL_checkudata(L, 1, NIXIO_META);
53 luaL_argcheck(L, sock->fd != -1, 1, "invalid socket object");
57 /* read fd from nixio_sock object */
58 int nixio__checksockfd(lua_State *L) {
59 return nixio__checksock(L)->fd;
62 /* return any possible fd, otherwise error out */
63 int nixio__checkfd(lua_State *L, int ud) {
64 int fd = nixio__tofd(L, ud);
65 return (fd != -1) ? fd : luaL_argerror(L, ud, "invalid file descriptor");
68 /* return any possible fd */
69 int nixio__tofd(lua_State *L, int ud) {
70 void *udata = lua_touserdata(L, ud);
72 if (lua_getmetatable(L, ud)) {
73 luaL_getmetatable(L, NIXIO_META);
74 luaL_getmetatable(L, NIXIO_FILE_META);
75 luaL_getmetatable(L, LUA_FILEHANDLE);
76 if (lua_rawequal(L, -3, -4)) {
77 fd = ((nixio_sock*)udata)->fd;
78 } else if (lua_rawequal(L, -2, -4)) {
80 } else if (lua_rawequal(L, -1, -4)) {
81 fd = (*((FILE **)udata)) ? fileno(*((FILE **)udata)) : -1;
88 /* An empty iterator */
89 int nixio__nulliter(lua_State *L) {
94 static int nixio_errno(lua_State *L) {
95 lua_pushinteger(L, errno);
99 static int nixio_strerror(lua_State *L) {
100 lua_pushstring(L, strerror(luaL_checkinteger(L, 1)));
105 static const luaL_reg R[] = {
106 {"errno", nixio_errno},
107 {"strerror", nixio_strerror},
112 NIXIO_API int luaopen_nixio(lua_State *L) {
113 /* create metatable */
114 luaL_newmetatable(L, NIXIO_META);
116 /* metatable.__index = metatable */
117 lua_pushvalue(L, -1);
118 lua_setfield(L, -2, "__index");
120 /* register module */
121 luaL_register(L, "nixio", R);
123 /* register metatable as socket_meta */
124 lua_pushvalue(L, -2);
125 lua_setfield(L, -2, "meta_socket");
127 /* register methods */
129 nixio_open__mingw(L);
132 nixio_open_socket(L);
133 nixio_open_sockopt(L);
135 nixio_open_address(L);
136 nixio_open_protoent(L);
139 nixio_open_splice(L);
140 nixio_open_process(L);
141 nixio_open_syslog(L);
148 nixio_open_tls_crypto(L);
149 nixio_open_tls_context(L);
150 nixio_open_tls_socket(L);
154 lua_pushinteger(L, VERSION);
155 lua_setfield(L, -2, "version");
160 lua_pushliteral(L, NIXIO_SEP);
161 lua_setfield(L, -2, "sep");
163 lua_pushliteral(L, NIXIO_PATHSEP);
164 lua_setfield(L, -2, "pathsep");
166 lua_pushinteger(L, NIXIO_BUFFERSIZE);
167 lua_setfield(L, -2, "buffersize");
169 NIXIO_PUSH_CONSTANT(EACCES);
170 NIXIO_PUSH_CONSTANT(EINTR);
171 NIXIO_PUSH_CONSTANT(ENOSYS);
172 NIXIO_PUSH_CONSTANT(EINVAL);
173 NIXIO_PUSH_CONSTANT(EAGAIN);
174 NIXIO_PUSH_CONSTANT(ENOMEM);
175 NIXIO_PUSH_CONSTANT(ENOENT);
176 NIXIO_PUSH_CONSTANT(ECHILD);
177 NIXIO_PUSH_CONSTANT(EIO);
178 NIXIO_PUSH_CONSTANT(EBADF);
179 NIXIO_PUSH_CONSTANT(EFAULT);
180 NIXIO_PUSH_CONSTANT(EFBIG);
181 NIXIO_PUSH_CONSTANT(ENOSPC);
182 NIXIO_PUSH_CONSTANT(EPIPE);
183 NIXIO_PUSH_CONSTANT(ESPIPE);
184 NIXIO_PUSH_CONSTANT(EISDIR);
185 NIXIO_PUSH_CONSTANT(EPERM);
186 NIXIO_PUSH_CONSTANT(EEXIST);
187 NIXIO_PUSH_CONSTANT(EMFILE);
188 NIXIO_PUSH_CONSTANT(ENAMETOOLONG);
189 NIXIO_PUSH_CONSTANT(ENFILE);
190 NIXIO_PUSH_CONSTANT(ENODEV);
191 NIXIO_PUSH_CONSTANT(EXDEV);
192 NIXIO_PUSH_CONSTANT(ENOTDIR);
193 NIXIO_PUSH_CONSTANT(ENXIO);
194 NIXIO_PUSH_CONSTANT(EROFS);
195 NIXIO_PUSH_CONSTANT(EBUSY);
196 NIXIO_PUSH_CONSTANT(ESRCH);
197 NIXIO_PUSH_CONSTANT(SIGINT);
198 NIXIO_PUSH_CONSTANT(SIGTERM);
199 NIXIO_PUSH_CONSTANT(SIGSEGV);
202 NIXIO_PUSH_CONSTANT(EALREADY);
203 NIXIO_PUSH_CONSTANT(EINPROGRESS);
204 NIXIO_PUSH_CONSTANT(EWOULDBLOCK);
205 NIXIO_PUSH_CONSTANT(ELOOP);
206 NIXIO_PUSH_CONSTANT(EOVERFLOW);
207 NIXIO_PUSH_CONSTANT(ETXTBSY);
208 NIXIO_PUSH_CONSTANT(EAFNOSUPPORT);
209 NIXIO_PUSH_CONSTANT(ENOBUFS);
210 NIXIO_PUSH_CONSTANT(EPROTONOSUPPORT);
211 NIXIO_PUSH_CONSTANT(ENOPROTOOPT);
212 NIXIO_PUSH_CONSTANT(EADDRINUSE);
213 NIXIO_PUSH_CONSTANT(ENETDOWN);
214 NIXIO_PUSH_CONSTANT(ENETUNREACH);
216 NIXIO_PUSH_CONSTANT(SIGALRM);
217 NIXIO_PUSH_CONSTANT(SIGKILL);
218 NIXIO_PUSH_CONSTANT(SIGHUP);
219 NIXIO_PUSH_CONSTANT(SIGSTOP);
220 NIXIO_PUSH_CONSTANT(SIGCONT);
221 NIXIO_PUSH_CONSTANT(SIGCHLD);
222 NIXIO_PUSH_CONSTANT(SIGQUIT);
223 NIXIO_PUSH_CONSTANT(SIGUSR1);
224 NIXIO_PUSH_CONSTANT(SIGUSR2);
225 NIXIO_PUSH_CONSTANT(SIGIO);
226 NIXIO_PUSH_CONSTANT(SIGURG);
227 NIXIO_PUSH_CONSTANT(SIGPIPE);
229 lua_pushvalue(L, -1);
230 lua_setfield(L, -3, "const_sock");
232 signal(SIGPIPE, SIG_IGN);
233 #endif /* !__WINNT__ */
234 lua_setfield(L, -2, "const");
236 /* remove meta table */