From a4f13a2fdf5cf1650edbb02ac0393c6815ef472c Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 7 Apr 2015 16:03:45 +0200
Subject: [PATCH] path-util: fix more path_is_mount e792e890f fallout

(cherry picked from commit da00518b3f3a8b08d521c4b72068eafa2db566cc)

Resolves: #1279231
---
 src/core/automount.c      |  6 ++----
 src/nspawn/nspawn.c       |  2 +-
 src/shared/cgroup-util.c  |  6 ++++--
 src/test/test-path-util.c | 10 ++++++++--
 4 files changed, 15 insertions(+), 9 deletions(-)

diff --git a/src/core/automount.c b/src/core/automount.c
index 7b9c4aaf1d..2d6f5f3a77 100644
--- a/src/core/automount.c
+++ b/src/core/automount.c
@@ -789,10 +789,8 @@ static int automount_start(Unit *u) {
         assert(a);
         assert(a->state == AUTOMOUNT_DEAD || a->state == AUTOMOUNT_FAILED);
 
-        if (path_is_mount_point(a->where, false)) {
-                log_unit_error(u->id,
-                               "Path %s is already a mount point, refusing start for %s",
-                               a->where, u->id);
+        if (path_is_mount_point(a->where, false) > 0) {
+                log_unit_error(u->id, "Path %s is already a mount point, refusing start for %s", a->where, u->id);
                 return -EEXIST;
         }
 
diff --git a/src/nspawn/nspawn.c b/src/nspawn/nspawn.c
index ee2e1832f1..e7ecee8674 100644
--- a/src/nspawn/nspawn.c
+++ b/src/nspawn/nspawn.c
@@ -864,7 +864,7 @@ static int mount_all(const char *dest) {
                         return log_oom();
 
                 t = path_is_mount_point(where, true);
-                if (t < 0) {
+                if (t < 0 && t != -ENOENT) {
                         log_error_errno(t, "Failed to detect whether %s is a mount point: %m", where);
 
                         if (r == 0)
diff --git a/src/shared/cgroup-util.c b/src/shared/cgroup-util.c
index 4585450b39..f1bed8a25a 100644
--- a/src/shared/cgroup-util.c
+++ b/src/shared/cgroup-util.c
@@ -489,8 +489,10 @@ int cg_get_path(const char *controller, const char *path, const char *suffix, ch
                 int r;
 
                 r = path_is_mount_point("/sys/fs/cgroup", false);
-                if (r <= 0)
-                        return r < 0 ? r : -ENOENT;
+                if (r < 0)
+                        return r;
+                if (r == 0)
+                        return -ENOENT;
 
                 /* Cache this to save a few stat()s */
                 good = true;
diff --git a/src/test/test-path-util.c b/src/test/test-path-util.c
index aee1f4e036..aebfa3821d 100644
--- a/src/test/test-path-util.c
+++ b/src/test/test-path-util.c
@@ -86,8 +86,14 @@ static void test_path(void) {
         test_parent("/aa///file...", "/aa///");
         test_parent("file.../", NULL);
 
-        assert_se(path_is_mount_point("/", true));
-        assert_se(path_is_mount_point("/", false));
+        assert_se(path_is_mount_point("/", true) > 0);
+        assert_se(path_is_mount_point("/", false) > 0);
+
+        assert_se(path_is_mount_point("/proc", true) > 0);
+        assert_se(path_is_mount_point("/proc", false) > 0);
+
+        assert_se(path_is_mount_point("/sys", true) > 0);
+        assert_se(path_is_mount_point("/sys", false) > 0);
 
         {
                 char p1[] = "aaa/bbb////ccc";