From 437b68f34c459d136c806e61dafb5825d2f97170 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nikola=20Forr=C3=B3?= <nforro@redhat.com>
Date: Tue, 17 Apr 2018 13:32:28 +0200
Subject: [PATCH 4/6] api.c: Show warning when tasks file can not be opened
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Signed-off-by: Nikola Forró <nforro@redhat.com>
---
 src/api.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/api.c b/src/api.c
index 4d98081..51081b4 100644
--- a/src/api.c
+++ b/src/api.c
@@ -1190,12 +1190,15 @@ static int __cgroup_attach_task_pid(char *path, pid_t tid)
 	if (!tasks) {
 		switch (errno) {
 		case EPERM:
-			return ECGROUPNOTOWNER;
+			ret = ECGROUPNOTOWNER;
+			break;
 		case ENOENT:
-			return ECGROUPNOTEXIST;
+			ret = ECGROUPNOTEXIST;
+			break;
 		default:
-			return ECGROUPNOTALLOWED;
+			ret = ECGROUPNOTALLOWED;
 		}
+		goto err;
 	}
 	ret = fprintf(tasks, "%d", tid);
 	if (ret < 0) {
@@ -1214,7 +1217,8 @@ static int __cgroup_attach_task_pid(char *path, pid_t tid)
 err:
 	cgroup_warn("Warning: cannot write tid %d to %s:%s\n",
 			tid, path, strerror(errno));
-	fclose(tasks);
+	if (tasks)
+		fclose(tasks);
 	return ret;
 }
 
-- 
2.17.0