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new way to handle -E option (write a mark in the registry to avoid

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reading environment variables)
This commit is contained in:
Roberto Ierusalimschy 2011-12-12 14:34:03 -02:00
parent a241b6cb3c
commit e2fc2ce8df
2 changed files with 22 additions and 18 deletions
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17
loadlib.c
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@ -1,5 +1,5 @@
/*
** $Id: loadlib.c,v 1.106 2011/11/28 17:27:51 roberto Exp roberto $
** $Id: loadlib.c,v 1.107 2011/11/30 12:58:57 roberto Exp roberto $
** Dynamic library loader for Lua
** See Copyright Notice in lua.h
**
@ -615,12 +615,25 @@ static int ll_seeall (lua_State *L) {
/* auxiliary mark (for internal use) */
#define AUXMARK "\1"
/*
** return registry.LUA_NOENV as a boolean
*/
static int noenv (lua_State *L) {
int b;
lua_getfield(L, LUA_REGISTRYINDEX, "LUA_NOENV");
b = lua_toboolean(L, -1);
lua_pop(L, 1); /* remove value */
return b;
}
static void setpath (lua_State *L, const char *fieldname, const char *envname1,
const char *envname2, const char *def) {
const char *path = getenv(envname1);
if (path == NULL) /* no environment variable? */
path = getenv(envname2); /* try alternative name */
if (path == NULL) /* no environment variable? */
if (path == NULL || noenv(L)) /* no environment variable? */
lua_pushstring(L, def); /* use default */
else {
/* replace ";;" by ";AUXMARK;" and then AUXMARK by default path */

23
lua.c
View File

@ -1,5 +1,5 @@
/*
** $Id: lua.c,v 1.201 2011/08/04 18:16:16 roberto Exp roberto $
** $Id: lua.c,v 1.202 2011/08/17 20:19:52 roberto Exp roberto $
** Lua stand-alone interpreter
** See Copyright Notice in lua.h
*/
@ -439,18 +439,6 @@ 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);
@ -464,14 +452,17 @@ static int pmain (lua_State *L) {
return 0;
}
if (args[has_v]) print_version();
if (args[has_E]) { /* option '-E'? */
lua_pushboolean(L, 1); /* signal for libraries to ignore env. vars. */
lua_setfield(L, LUA_REGISTRYINDEX, "LUA_NOENV");
}
/* open standard libraries */
luaL_checkversion(L);
lua_gc(L, LUA_GCSTOP, 0); /* stop collector during initialization */
luaL_openlibs(L); /* open libraries */
lua_gc(L, LUA_GCRESTART, 0);
if (args[has_E]) /* avoid LUA_INIT? */
resetpaths(L);
else if (handle_luainit(L) != LUA_OK) return 0;
if (!args[has_E] && handle_luainit(L) != LUA_OK)
return 0; /* error running LUA_INIT */
/* execute arguments -e and -l */
if (!runargs(L, argv, (script > 0) ? script : argc)) return 0;
/* execute main script (if there is one) */