[pve-devel] [PATCH guest-common] tunnel: improve version error handling

[Fabian Grünbichler]

prevent a warning about $ver being an uninitialized value in case the tunnel
didn't provide a version string at all, for example because it already closed
cause of a prior error.

Signed-off-by: Fabian Grünbichler <f.gruenbichler at proxmox.com>
---
prompted by https://bugzilla.proxmox.com/show_bug.cgi?id=6340

 src/PVE/Tunnel.pm | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/PVE/Tunnel.pm b/src/PVE/Tunnel.pm
index 4f8df8e..30cebfc 100644
--- a/src/PVE/Tunnel.pm
+++ b/src/PVE/Tunnel.pm
@@ -179,7 +179,9 @@ sub fork_ssh_tunnel {
 
     eval {
 	my $ver = read_tunnel($tunnel, 10);
-	if ($ver =~ /^ver (\d+)$/) {
+	if (!defined($ver)) {
+	    $err = "failed to receive tunnel version string\n" if !$err;
+	} elsif ($ver =~ /^ver (\d+)$/) {
 	    $tunnel->{version} = $1;
 	    $log->('info', "ssh tunnel $ver\n");
 	} else {
-- 
2.39.5