From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 26 Apr 2011 19:12:36 +0000 (+0200)
Subject: mount: failure to mount cgroup hierarchies should not be fatal
X-Git-Tag: v26~21
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=016e9849e03c1375a09c11c54ad06a61f6a24473

mount: failure to mount cgroup hierarchies should not be fatal

If we cannot open /etc/cgroup, print an error message, but go on, to
support cgroup-less builds.

https://bugzilla.redhat.com/show_bug.cgi?id=628004
---

diff --git a/src/mount-setup.c b/src/mount-setup.c
index 77be8fead..48c32eab3 100644
--- a/src/mount-setup.c
+++ b/src/mount-setup.c
@@ -136,8 +136,10 @@ static int mount_cgroup_controllers(void) {
 
         /* Mount all available cgroup controllers that are built into the kernel. */
 
-        if (!(f = fopen("/proc/cgroups", "re")))
-                return -ENOENT;
+        if (!(f = fopen("/proc/cgroups", "re"))) {
+                log_error("Failed to enumerate cgroup controllers: %m");
+                return 0;
+        }
 
         /* Ignore the header line */
         (void) fgets(buf, sizeof(buf), f);