getcwd() returns NULL on failure, not 0 on success

diff --git a/mon_systrace.c b/mon_systrace.c
index 051df6a6382468fb534683dfc0c736e62f05ed56..8f338a2dc877a4e8f887f5d9e8f09c3d47193fce 100644 (file)
--- a/mon_systrace.c
+++ b/mon_systrace.c
@@ -862,7 +862,7 @@ check_execv(fd, pid, seqnr, askp, policyp, errorp)
 
     /* Get processes's cwd. */
     rval = ioctl(fd, STRIOCGETCWD, &pid);
-    if (rval == -1 || getcwd(user_cwd, sizeof(user_cwd)) != 0) {
+    if (rval == -1 || getcwd(user_cwd, sizeof(user_cwd)) == NULL) {
        if (rval == -1 && errno == EBUSY)
            return(-1);
        warningx("cannot get working directory");