/*
** Unlocks a file.
** @param #1 File handle.
** @param #2 Number with start position (optional).
** @param #3 Number with length (optional).
*/
static int file_unlock (lua_State *L) {
FILE *fh = check_file (L, 1, "unlock");
const long start = luaL_optinteger (L, 2, 0);
long len = luaL_optinteger (L, 3, 0);
if (_file_lock (L, fh, "u", start, len, "unlock")) {
lua_pushboolean (L, 1);
return 1;
} else {
lua_pushnil (L);
lua_pushfstring (L, "%s", strerror(errno));
return 2;
}
}
/*
** Locks a file.
** @param #1 File handle.
** @param #2 String with lock mode ('w'rite, 'r'ead).
** @param #3 Number with start position (optional).
** @param #4 Number with length (optional).
*/
static int file_lock (lua_State *L) {
FILE *fh = check_file (L, 1, "lock");
const char *mode = luaL_checkstring (L, 2);
const long start = luaL_optlong (L, 3, 0);
long len = luaL_optlong (L, 4, 0);
if (_file_lock (L, fh, mode, start, len, "lock")) {
lua_pushboolean (L, 1);
return 1;
} else {
lua_pushnil (L);
lua_pushfstring (L, "%s", strerror(errno));
return 2;
}
}
