From 47ac571b28414165099b6642cff5a275d8abf9ab Mon Sep 17 00:00:00 2001
From: Dale Rahn <drahn@cvs.openbsd.org>
Date: Tue, 11 Nov 2003 14:51:02 +0000
Subject: Better fix to the library name parsing. now correctly handles
 libpython2.2.so.0.0 vs libpython2.1.so.0.0. Clean up a potential memory leak
 if the filename is not a valid library. ok brad@

---
 libexec/ld.so/sod.c  | 26 +++++++++++---------------
 libexec/ld.so/util.h | 20 +++++++++++++++++++-
 2 files changed, 30 insertions(+), 16 deletions(-)

diff --git a/libexec/ld.so/sod.c b/libexec/ld.so/sod.c
index 2c709265ef5..74e3f031f43 100644
--- a/libexec/ld.so/sod.c
+++ b/libexec/ld.so/sod.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: sod.c,v 1.19 2003/10/26 23:23:12 drahn Exp $	*/
+/*	$OpenBSD: sod.c,v 1.20 2003/11/11 14:51:01 drahn Exp $	*/
 
 /*
  * Copyright (c) 1993 Paul Kranenburg
@@ -69,40 +69,36 @@ _dl_build_sod(const char *name, struct sod *sodp)
 
 	/* does it look like /^lib/ ? */
 	if (_dl_strncmp((char *)sodp->sod_name, "lib", 3) != 0)
-		return;
+		goto backout;
 
 	/* is this a filename? */
 	if (_dl_strchr((char *)sodp->sod_name, '/'))
-		return;
+		goto backout;
 
 	/* skip over 'lib' */
 	cp = (char *)sodp->sod_name + 3;
 
+	realname = cp;
+
 	/* dot guardian */
 	if ((_dl_strchr(cp, '.') == NULL) || (*(cp+_dl_strlen(cp)-1) == '.'))
-		return;
+		goto backout;
+
+	cp = _dl_strstr(cp, ".so");
+	if (cp == NULL)
+		goto backout;
 
 	/* default */
 	major = minor = -1;
 
-	realname = NULL;
 	/* loop through name - parse skipping name */
 	for (tuplet = 0; (tok = strsep(&cp, ".")) != NULL; tuplet++) {
 		switch (tuplet) {
 		case 0:
-			/* removed 'lib' and extensions from name */
-			realname = tok;
+			/* empty tok, we already skipped to "\.so.*" */
 			break;
 		case 1:
 			/* 'so' extension */
-			if (_dl_strcmp(tok, "so") != 0) {
-				/*
-				 * filenames such as libX-A.B.so.X.Y
-				 * screw this up, decrement tuplet
-				 * and try to continue.
-				 */
-				 tuplet--;
-			}
 			break;
 		case 2:
 			/* major version extension */
diff --git a/libexec/ld.so/util.h b/libexec/ld.so/util.h
index 6a027480919..54b3fffc09b 100644
--- a/libexec/ld.so/util.h
+++ b/libexec/ld.so/util.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: util.h,v 1.16 2003/07/06 20:03:58 deraadt Exp $	*/
+/*	$OpenBSD: util.h,v 1.17 2003/11/11 14:51:01 drahn Exp $	*/
 
 /*
  * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
@@ -144,4 +144,22 @@ _dl_strchr(const char *p, const int ch)
 	/* NOTREACHED */
 }
 
+static inline char *
+_dl_strstr(const char *s, const char *find)
+{
+	char c, sc;
+	size_t len;
+	if ((c = *find++) != 0) {
+		len = _dl_strlen(find);
+		do {
+			do {
+				if ((sc = *s++) == 0)
+					return (NULL);
+			} while (sc != c);
+		} while (_dl_strncmp(s, find, len) != 0);
+		s--;
+	}
+	return ((char *)s);
+}
+
 #endif /*__DL_UTIL_H__*/
-- 
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