[PATCH] cgtop: work even if not all cgroups are available

[Shawn Landden]

cgtop quits on startup if all the cgroup mounts it expects are not available.
Just continue without nonexistant ones.
---
 src/cgtop/cgtop.c |   17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/src/cgtop/cgtop.c b/src/cgtop/cgtop.c
index ddb5709..f988adb 100644
--- a/src/cgtop/cgtop.c
+++ b/src/cgtop/cgtop.c
@@ -341,17 +341,22 @@ static int refresh(Hashmap *a, Hashmap *b, unsigned iteration) {
 
         r = refresh_one("name=systemd", "/", a, b, iteration, 0);
         if (r < 0)
-                return r;
-
+                if (r != -ENOENT)
+                    return r;
         r = refresh_one("cpuacct", "/", a, b, iteration, 0);
         if (r < 0)
-                return r;
-
+                if (r != -ENOENT)
+                    return r;
         r = refresh_one("memory", "/", a, b, iteration, 0);
         if (r < 0)
-                return r;
+                if (r != -ENOENT)
+                    return r;
 
-        return refresh_one("blkio", "/", a, b, iteration, 0);
+        r = refresh_one("blkio", "/", a, b, iteration, 0);
+        if (r < 0)
+                if (r != -ENOENT)
+                    return r;
+        return 0;
 }
 
 static int group_compare(const void*a, const void *b) {
-- 
1.7.9.5


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