Subject: Re: reducing library searches in ld.elf_so
To: Charles Hannum <abuse@spamalicious.com>
From: Bang Jun-Young <junyoung@mogua.com>
List: tech-userlevel
Date: 09/28/2002 12:29:46
On Sat, Sep 28, 2002 at 12:16:18PM +0900, Bang Jun-Young wrote:
> +		if (!strncmp(name, sp->sp_path + sp->sp_pathlen - namelen,
> +		    namelen) && !strncmp(dir, sp->sp_path, sp->sp_pathlen -

Euch. This is the correct one:

Index: search.c
===================================================================
RCS file: /cvsroot/basesrc/libexec/ld.elf_so/search.c,v
retrieving revision 1.13
diff -u -r1.13 search.c
--- search.c	2002/09/24 12:52:20	1.13
+++ search.c	2002/09/28 03:25:45
@@ -55,6 +55,8 @@
 /*
  * Data declarations.
  */
+Search_Path    *_rtld_invalid_paths;
+
 static Obj_Entry *_rtld_search_library_path __P((const char *, size_t,
     const char *, size_t, int));
 
@@ -68,6 +70,16 @@
 {
 	char *pathname;
 	Obj_Entry *obj;
+	Search_Path *sp;
+
+	for (sp = _rtld_invalid_paths; sp != NULL; sp = sp->sp_next) {
+		/* Compare names first, then dirpaths. */
+		if (!strncmp(name, sp->sp_path + sp->sp_pathlen - namelen,
+		    namelen) && !strncmp(dir, sp->sp_path, dirlen)) {
+			dbg(("  \"%s/%s\" marked invalid", dir, name));
+			return NULL;
+		}
+	}
 
 	pathname = xmalloc(dirlen + 1 + namelen + 1);
 	(void)strncpy(pathname, dir, dirlen);
@@ -76,8 +88,10 @@
 
 	dbg(("  Trying \"%s\"", pathname));
 	obj = _rtld_load_object(pathname, mode);
-	if (obj == NULL)
+	if (obj == NULL) {
+		_rtld_add_paths(&_rtld_invalid_paths, pathname);
 		free(pathname);
+	}
 	return obj;
 }
 
Jun-Young

-- 
Bang Jun-Young <junyoung@mogua.com>