From: Lennart Poettering <lennart@poettering.net>
Date: Wed, 24 Oct 2018 15:25:11 +0000 (+0200)
Subject: cgroup-util: debug log if /proc/self/ns/cgroup is not available for unexpected reasons
X-Git-Tag: v240~458^2~7
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=0887fa711cc3ed63114ec53b4052a626f6929915;p=thirdparty%2Fsystemd.git

cgroup-util: debug log if /proc/self/ns/cgroup is not available for unexpected reasons
---

diff --git a/src/basic/cgroup-util.c b/src/basic/cgroup-util.c
index 19723d30843..65ca6f2f504 100644
--- a/src/basic/cgroup-util.c
+++ b/src/basic/cgroup-util.c
@@ -129,10 +129,12 @@ bool cg_ns_supported(void) {
         if (enabled >= 0)
                 return enabled;
 
-        if (access("/proc/self/ns/cgroup", F_OK) == 0)
-                enabled = 1;
-        else
-                enabled = 0;
+        if (access("/proc/self/ns/cgroup", F_OK) < 0) {
+                if (errno != ENOENT)
+                        log_debug_errno(errno, "Failed to check whether /proc/self/ns/cgroup is available, assuming not: %m");
+                enabled = false;
+        } else
+                enabled = true;
 
         return enabled;
 }