#include <stdio.h>
#include <string.h>
#include <unistd.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
-static int nixio_file(lua_State *L) {
+static int nixio_open(lua_State *L) {
const char *filename = luaL_checklstring(L, 1, NULL);
- const char *mode = luaL_optlstring(L, 2, "r", NULL);
+ int flags = luaL_optint(L, 2, O_RDONLY);
+ int mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
+ int fd;
- FILE *file = fopen(filename, mode);
- if (!file) {
+ do {
+ fd = open(filename, flags, mode);
+ } while (fd == -1 && errno == EINTR);
+ if (fd == -1) {
return nixio__perror(L);
}
- FILE **udata = lua_newuserdata(L, sizeof(FILE**));
- *udata = file;
+ int *udata = lua_newuserdata(L, sizeof(int));
+ if (!udata) {
+ return luaL_error(L, "out of memory");
+ }
+
+ *udata = fd;
luaL_getmetatable(L, NIXIO_FILE_META);
lua_setmetatable(L, -2);
return 1;
}
+static int nixio_open_flags(lua_State *L) {
+ int mode = 0;
+ const int j = lua_gettop(L);
+ for (int i=1; i<=j; i++) {
+ const char *flag = luaL_checkstring(L, i);
+ if (!strcmp(flag, "append")) {
+ mode |= O_APPEND;
+ } else if (!strcmp(flag, "creat")) {
+ mode |= O_CREAT;
+ } else if (!strcmp(flag, "excl")) {
+ mode |= O_EXCL;
+ } else if (!strcmp(flag, "nonblock") || !strcmp(flag, "ndelay")) {
+ mode |= O_NONBLOCK;
+ } else if (!strcmp(flag, "sync")) {
+ mode |= O_SYNC;
+ } else if (!strcmp(flag, "trunc")) {
+ mode |= O_TRUNC;
+ } else if (!strcmp(flag, "rdonly")) {
+ mode |= O_RDONLY;
+ } else if (!strcmp(flag, "wronly")) {
+ mode |= O_WRONLY;
+ } else if (!strcmp(flag, "rdwr")) {
+ mode |= O_RDWR;
+ } else {
+ return luaL_argerror(L, i, "supported values: append, creat, "
+ "excl, nonblock, ndelay, sync, trunc");
+ }
+ }
+ lua_pushinteger(L, mode);
+ return 1;
+}
+
+static int nixio_dup(lua_State *L) {
+ int oldfd = nixio__checkfd(L, 1);
+ int newfd = (lua_gettop(L) > 1) ? nixio__checkfd(L, 2) : -1;
+ int stat = (newfd == -1) ? dup(oldfd) : dup2(oldfd, newfd);
+
+ if (stat == -1) {
+ return nixio__perror(L);
+ } else {
+ int *udata = lua_newuserdata(L, sizeof(int));
+ if (!udata) {
+ return luaL_error(L, "out of memory");
+ }
+
+ *udata = stat;
+ luaL_getmetatable(L, NIXIO_FILE_META);
+ lua_setmetatable(L, -2);
+ return 1;
+ }
+}
+
static int nixio_pipe(lua_State *L) {
- int pipefd[2];
- FILE **udata;
+ int pipefd[2], *udata;
if (pipe(pipefd)) {
return nixio__perror(L);
}
luaL_getmetatable(L, NIXIO_FILE_META);
- udata = lua_newuserdata(L, sizeof(FILE**));
- if (!(*udata = fdopen(pipefd[0], "r"))) {
- return nixio__perror(L);
+ udata = lua_newuserdata(L, sizeof(int));
+ if (!udata) {
+ return luaL_error(L, "out of memory");
}
+
+ *udata = pipefd[0];
lua_pushvalue(L, -2);
lua_setmetatable(L, -2);
- udata = lua_newuserdata(L, sizeof(FILE**));
- if (!(*udata = fdopen(pipefd[1], "w"))) {
- return nixio__perror(L);
+ udata = lua_newuserdata(L, sizeof(int));
+ if (!udata) {
+ return luaL_error(L, "out of memory");
}
+
+ *udata = pipefd[1];
lua_pushvalue(L, -3);
lua_setmetatable(L, -2);
}
static int nixio_file_write(lua_State *L) {
- FILE *fp = nixio__checkfile(L);
- size_t len, written;
+ int fd = nixio__checkfd(L, 1);
+ size_t len;
+ ssize_t sent;
const char *data = luaL_checklstring(L, 2, &len);
- written = fwrite(data, sizeof(char), len, fp);
- if (written < 0) {
- return nixio__perror(L);
- } else {
- lua_pushnumber(L, written);
+
+ do {
+ sent = write(fd, data, len);
+ } while(sent == -1 && errno == EINTR);
+ if (sent >= 0) {
+ lua_pushinteger(L, sent);
return 1;
+ } else {
+ return nixio__perror(L);
}
}
-
-/* Some code borrowed from Lua 5.1.4 liolib.c */
static int nixio_file_read(lua_State *L) {
- FILE *f = nixio__checkfile(L);
- size_t n = (size_t)luaL_checkinteger(L, 2);
- luaL_argcheck(L, 2, n >= 0, "invalid length");
-
- if (n == 0) {
- if (feof(f)) {
- return 0;
- } else {
- lua_pushliteral(L, "");
- return 1;
- }
- }
+ int fd = nixio__checkfd(L, 1);
+ char buffer[NIXIO_BUFFERSIZE];
+ int req = luaL_checkinteger(L, 2);
+ int readc;
- size_t rlen; /* how much to read */
- size_t nr; /* number of chars actually read */
- luaL_Buffer b;
- luaL_buffinit(L, &b);
- rlen = LUAL_BUFFERSIZE; /* try to read that much each time */
+ /* We limit the readsize to NIXIO_BUFFERSIZE */
+ req = (req > NIXIO_BUFFERSIZE) ? NIXIO_BUFFERSIZE : req;
do {
- char *p = luaL_prepbuffer(&b);
- if (rlen > n) rlen = n; /* cannot read more than asked */
- nr = fread(p, sizeof(char), rlen, f);
- luaL_addsize(&b, nr);
- n -= nr; /* still have to read `n' chars */
- } while (n > 0 && nr == rlen); /* until end of count or eof */
- luaL_pushresult(&b); /* close buffer */
- return (n == 0 || lua_objlen(L, -1) > 0);
+ readc = read(fd, buffer, req);
+ } while (readc == -1 && errno == EINTR);
+
+ if (readc < 0) {
+ return nixio__perror(L);
+ } else {
+ lua_pushlstring(L, buffer, readc);
+ return 1;
+ }
}
+
static int nixio_file_seek(lua_State *L) {
- FILE *f = nixio__checkfile(L);
+ int fd = nixio__checkfd(L, 1);
off_t len = (off_t)luaL_checknumber(L, 2);
int whence;
const char *whstr = luaL_optlstring(L, 3, "set", NULL);
} else {
return luaL_argerror(L, 3, "supported values: set, cur, end");
}
- return nixio__pstatus(L, !fseeko(f, len, whence));
+ len = lseek(fd, len, whence);
+ if (len == -1) {
+ return nixio__perror(L);
+ } else {
+ lua_pushnumber(L, len);
+ return 1;
+ }
}
static int nixio_file_tell(lua_State *L) {
- FILE *f = nixio__checkfile(L);
- off_t pos = ftello(f);
+ int fd = nixio__checkfd(L, 1);
+ off_t pos = lseek(fd, 0, SEEK_CUR);
if (pos < 0) {
return nixio__perror(L);
} else {
- lua_pushnumber(L, (lua_Number)pos);
+ lua_pushnumber(L, pos);
return 1;
}
}
-static int nixio_file_flush(lua_State *L) {
- FILE *f = nixio__checkfile(L);
- return nixio__pstatus(L, !fflush(f));
+static int nixio_file_sync(lua_State *L) {
+ int fd = nixio__checkfd(L, 1);
+ int meta = lua_toboolean(L, 2);
+ return nixio__pstatus(L, (meta) ? !fsync(fd) : !fdatasync(fd));
+}
+
+static int nixio_file_lock(lua_State *L) {
+ int fd = nixio__checkfd(L, 1);
+ const char *flag = luaL_checkstring(L, 2);
+ off_t len = (off_t)luaL_optnumber(L, 3, 0);
+ int stat;
+
+ int cmd = 0;
+ if (!strcmp(flag, "lock")) {
+ cmd = F_LOCK;
+ } else if (!strcmp(flag, "tlock")) {
+ cmd = F_TLOCK;
+ } else if (!strcmp(flag, "ulock")) {
+ cmd = F_ULOCK;
+ } else if (!strcmp(flag, "test")) {
+ cmd = F_TEST;
+ } else {
+ return luaL_argerror(L, 2,
+ "supported values: lock, tlock, ulock, test");
+ }
+
+ do {
+ stat = lockf(fd, cmd, len);
+ } while (stat == -1 && errno == EINTR);
+
+ return nixio__pstatus(L, !stat);
}
static int nixio_file_close(lua_State *L) {
- FILE **fpp = (FILE**)luaL_checkudata(L, 1, NIXIO_FILE_META);
- luaL_argcheck(L, *fpp, 1, "invalid file object");
- int res = fclose(*fpp);
- *fpp = NULL;
+ int *fdp = luaL_checkudata(L, 1, NIXIO_FILE_META);
+ luaL_argcheck(L, *fdp != -1, 1, "invalid file object");
+ int res;
+ do {
+ res = close(*fdp);
+ } while (res == -1 && errno == EINTR);
+ *fdp = -1;
return nixio__pstatus(L, !res);
}
static int nixio_file__gc(lua_State *L) {
- FILE **fpp = (FILE**)luaL_checkudata(L, 1, NIXIO_FILE_META);
- if (*fpp) {
- fclose(*fpp);
- *fpp = NULL;
+ int *fdp = luaL_checkudata(L, 1, NIXIO_FILE_META);
+ int res;
+ if (*fdp != -1) {
+ do {
+ res = close(*fdp);
+ } while (res == -1 && errno == EINTR);
+ *fdp = -1;
}
return 0;
}
{"read", nixio_file_read},
{"tell", nixio_file_tell},
{"seek", nixio_file_seek},
- {"flush", nixio_file_flush},
+ {"sync", nixio_file_sync},
+ {"lock", nixio_file_lock},
{"close", nixio_file_close},
{"__gc", nixio_file__gc},
{"__tostring", nixio_file__tostring},
/* module table */
static const luaL_reg R[] = {
- {"open", nixio_file},
+ {"dup", nixio_dup},
+ {"open", nixio_open},
+ {"open_flags", nixio_open_flags},
{"pipe", nixio_pipe},
{NULL, NULL}
};
luaL_register(L, NULL, M);
lua_pushvalue(L, -1);
lua_setfield(L, -2, "__index");
- lua_pop(L, 1);
+ lua_setfield(L, -2, "meta_file");
}
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