From 953d5e1531c8df726ccffff61b2486fbbdd6a9ac Mon Sep 17 00:00:00 2001
From: Dietmar Maurer <dietmar@proxmox.com>
Date: Wed, 31 Jul 2019 12:44:27 +0200
Subject: [PATCH] src/tools.rs - file_set_contents_full: only call fchmod when
 we pass permissions

So that we can use it to write into /etc/pve/ (which does not support chmod).
---
 src/tools.rs | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/tools.rs b/src/tools.rs
index 3c1c711d..0efe5bd7 100644
--- a/src/tools.rs
+++ b/src/tools.rs
@@ -197,9 +197,11 @@ pub fn file_set_contents_full<P: AsRef<Path>>(
         stat::Mode::S_IRGRP | stat::Mode::S_IROTH
     ));
 
-    if let Err(err) = stat::fchmod(fd, mode) {
-        let _ = unistd::unlink(tmp_path);
-        bail!("fchmod {:?} failed: {}", tmp_path, err);
+    if perm != None {
+        if let Err(err) = stat::fchmod(fd, mode) {
+            let _ = unistd::unlink(tmp_path);
+            bail!("fchmod {:?} failed: {}", tmp_path, err);
+        }
     }
 
     if owner != None || group != None {