0009-basic-virt-fix-userns-check-on-CONFIG_USER_NS-n-kern.patch

From 7d7017a583a014c239cf8f68d484f22f67ca80ac Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Fri, 11 Nov 2016 10:54:54 -0500
Subject: [PATCH] basic/virt: fix userns check on CONFIG_USER_NS=n kernel
 (#4651)

ENOENT should be treated as "false", but because of the broken errno check it
was treated as an error. So ConditionVirtualization=user-namespaces probably
returned the correct answer, but only by accident.

Fixes #4608.
(cherry picked from commit abd67ce74858491565cde157c7b08fda43d3279c)
---
 src/basic/virt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/basic/virt.c b/src/basic/virt.c
index 69b0f96183..d8d57381ad 100644
--- a/src/basic/virt.c
+++ b/src/basic/virt.c
@@ -496,7 +496,7 @@ static int userns_has_mapping(const char *name) {
         f = fopen(name, "re");
         if (!f) {
                 log_debug_errno(errno, "Failed to open %s: %m", name);
-                return errno == -ENOENT ? false : -errno;
+                return errno == ENOENT ? false : -errno;
         }
 
         n = getline(&buf, &n_allocated, f);