Redirect stderr of scp(1) to stdout to not indicate errors

Some warning messages of scp(1) are written to stderr (like "Connection
to ... closed by remote host."), even when there is no error and the
exit code is 0 ("no error"). Therefore redirect stderr to stdout to not
confuse "mail wrapper scripts" that see output on stderr otherwise.

diff --git a/bin/backup-script b/bin/backup-script
index 89b066db8bddddcabff66b15c30df1ebfd161e62..3d3db8512592bf45fd1217afd98b869c67717ead 100755 (executable)
--- a/bin/backup-script
+++ b/bin/backup-script
@@ -646,7 +646,11 @@ for f in "${sys[@]}"; do
                        && cmd="$cmd ${user}@${system}:$source_root $sys_target/" \
                        || cmd="$cmd $source_root $sys_target/"
        elif [[ "$backup_type" == "scp" ]]; then
-               cmd="scp"
+               # scp writes some warning messages to stderr (like "Connection
+               # to ... closed by remote host."), even when there is no error
+               # and the exit code is 0 ("no error"); therefore we redirect
+               # stderr to stdout to not confuse "mail wrapper scripts" etc.
+               cmd="scp 2>&1"
                [ "$VERBOSE" -eq 0 ] && cmd="$cmd -q"
                for file in $files; do
                        cmd="$cmd ${user}@${system}:$file $sys_target/"