From c7a64b3cac7ac3db89bbe0b9b1e826cd65e44b5d Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Thu, 8 Dec 2016 17:15:06 +0100
Subject: util-lib: accept invoking chase_symlinks() with a NULL return
 parameter

Let's permit invoking chase_symlinks() with a NULL return parameter. If so, the
resolved name is not returned, and call is useful for checking for existance of
a file, without actually returning its ultimate path.
---
 src/basic/fs-util.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'src/basic/fs-util.c')

diff --git a/src/basic/fs-util.c b/src/basic/fs-util.c
index 4d494650c..471708bbe 100644
--- a/src/basic/fs-util.c
+++ b/src/basic/fs-util.c
@@ -813,8 +813,10 @@ int chase_symlinks(const char *path, const char *original_root, unsigned flags,
                         return -ENOMEM;
         }
 
-        *ret = done;
-        done = NULL;
+        if (ret) {
+                *ret = done;
+                done = NULL;
+        }
 
         return exists;
 }
-- 
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