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better error message when trying to open files

This commit is contained in:
Roberto Ierusalimschy 2011-08-02 15:00:01 -03:00
parent ff98f17d27
commit ae14adc272
1 changed files with 4 additions and 6 deletions
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10
liolib.c
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@ -1,5 +1,5 @@
/*
** $Id: liolib.c,v 2.101 2011/06/27 19:42:31 roberto Exp roberto $
** $Id: liolib.c,v 2.102 2011/07/28 18:41:15 roberto Exp roberto $
** Standard I/O (and system) library
** See Copyright Notice in lua.h
*/
@ -157,10 +157,8 @@ static LStream *newfile (lua_State *L) {
static void opencheck (lua_State *L, const char *fname, const char *mode) {
LStream *p = newfile(L);
p->f = fopen(fname, mode);
if (p->f == NULL) {
lua_pushfstring(L, "%s: %s", fname, strerror(errno));
luaL_argerror(L, 1, lua_tostring(L, -1));
}
if (p->f == NULL)
luaL_error(L, "cannot open file " LUA_QS " (%s)", fname, strerror(errno));
}
@ -174,7 +172,7 @@ static int io_open (lua_State *L) {
(mode[i] != '+' || ++i) && /* skip if char is '+' */
(mode[i] != 'b' || ++i) && /* skip if char is 'b' */
(mode[i] == '\0')))
return luaL_error(L, "invalid mode " LUA_QL("%s")
return luaL_error(L, "invalid mode " LUA_QS
" (should match " LUA_QL("[rwa]%%+?b?") ")", mode);
p->f = fopen(filename, mode);
return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1;