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new option '-E' to avoid environment variables

This commit is contained in:
Roberto Ierusalimschy 2011-08-17 17:19:52 -03:00
parent 51471ba748
commit 166dd0261a
1 changed files with 25 additions and 5 deletions
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30
lua.c
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@ -1,5 +1,5 @@
/*
** $Id: lua.c,v 1.200 2011/06/16 14:30:58 roberto Exp roberto $
** $Id: lua.c,v 1.201 2011/08/04 18:16:16 roberto Exp roberto $
** Lua stand-alone interpreter
** See Copyright Notice in lua.h
*/
@ -118,6 +118,7 @@ static void print_usage (const char *badoption) {
" -i enter interactive mode after executing " LUA_QL("script") "\n"
" -l name require library " LUA_QL("name") "\n"
" -v show version information\n"
" -E ignore environment variables\n"
" -- stop handling options\n"
" - stop handling options and execute stdin\n"
,
@ -352,6 +353,9 @@ static int handle_script (lua_State *L, char **argv, int n) {
#define has_i 0 /* -i */
#define has_v 1 /* -v */
#define has_e 2 /* -e */
#define has_E 3 /* -E */
#define num_has 4 /* number of 'has_*' */
static int collectargs (char **argv, int *args) {
@ -365,6 +369,9 @@ static int collectargs (char **argv, int *args) {
return (argv[i+1] != NULL ? i+1 : 0);
case '\0':
return i;
case 'E':
args[has_E] = 1;
break;
case 'i':
noextrachars(argv[i]);
args[has_i] = 1; /* go through */
@ -432,12 +439,24 @@ static int handle_luainit (lua_State *L) {
}
static void resetpaths (lua_State *L) {
lua_getglobal(L, "package");
if (!lua_istable(L, -1)) /* no module 'package'? */
return; /* nothing to be done */
lua_pushliteral(L, LUA_PATH_DEFAULT);
lua_setfield(L, -2, "path"); /* package.path = default */
lua_pushliteral(L, LUA_CPATH_DEFAULT);
lua_setfield(L, -2, "cpath"); /* package.cpath = default */
lua_pop(L, 1); /* remove 'package' */
}
static int pmain (lua_State *L) {
int argc = (int)lua_tointeger(L, 1);
char **argv = (char **)lua_touserdata(L, 2);
int script;
int args[3];
args[has_i] = args[has_v] = args[has_e] = 0;
int args[num_has];
args[has_i] = args[has_v] = args[has_e] = args[has_E] = 0;
if (argv[0] && argv[0][0]) progname = argv[0];
script = collectargs(argv, args);
if (script < 0) { /* invalid arg? */
@ -450,8 +469,9 @@ static int pmain (lua_State *L) {
lua_gc(L, LUA_GCSTOP, 0); /* stop collector during initialization */
luaL_openlibs(L); /* open libraries */
lua_gc(L, LUA_GCRESTART, 0);
/* run LUA_INIT */
if (handle_luainit(L) != LUA_OK) return 0;
if (args[has_E]) /* avoid LUA_INIT? */
resetpaths(L);
else if (handle_luainit(L) != LUA_OK) return 0;
/* execute arguments -e and -l */
if (!runargs(L, argv, (script > 0) ? script : argc)) return 0;
/* execute main script (if there is one) */