1 files changed, 7 insertions, 3 deletions

diff --git a/src/lib/libc/stdlib/realpath.c b/src/lib/libc/stdlib/realpath.c
index e349b7e068..0288601464 100644
--- a/src/lib/libc/stdlib/realpath.c
+++ b/src/lib/libc/stdlib/realpath.c
@@ -35,8 +35,7 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-/*static char sccsid[] = "from: @(#)realpath.c  8.1 (Berkeley) 2/16/94";*/
-static char *rcsid = "$Id: realpath.c,v 1.1.1.1 1995/10/18 08:42:19 deraadt Exp $";
+static char *rcsid = "$OpenBSD: realpath.c,v 1.4 1998/05/18 09:55:19 deraadt Exp $";
 #endif /* LIBC_SCCS and not lint */
 
 #include <sys/param.h>
@@ -63,6 +62,7 @@ realpath(path, resolved)
         struct stat sb;
         int fd, n, rootd, serrno;
         char *p, *q, wbuf[MAXPATHLEN];
+        int symlinks = 0;
 
         /* Save the starting point. */
         if ((fd = open(".", O_RDONLY)) < 0) {
@@ -101,7 +101,11 @@ loop:
         /* Deal with the last component. */
         if (lstat(p, &sb) == 0) {
                 if (S_ISLNK(sb.st_mode)) {
-                        n = readlink(p, resolved, MAXPATHLEN);
+                        if (++symlinks > MAXSYMLINKS) {
+                                errno = ELOOP;
+                                goto err1;
+                        }
+                        n = readlink(p, resolved, MAXPATHLEN-1);
                         if (n < 0)
                                 goto err1;
                         resolved[n] = '\0';