libpod: fix c.Hostname() to respect the utsNsCtr

When we lookup the hostname for a given container we have to check if
the container is joined to another utsns and use this hostname then
instead.
This fixes a problem where the `hostname` command would use the correct
name but /etc/hostname would contain a different name.

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/test/system/500-networking.bats b/test/system/500-networking.bats
index f5bb76d9a..f57c3dbd7 100644
--- a/test/system/500-networking.bats
+++ b/test/system/500-networking.bats
@@ -142,7 +142,7 @@ load helpers
     pid="$output"
     run_podman run --pod $pod_name --name $con1_name $IMAGE cat /etc/hosts
     is "$output" ".*\s$pod_name $infra_name.*" "Pod hostname in /etc/hosts"
-    is "$output" ".*127.0.0.1\s.*$con1_name.*" "Container1 name in /etc/hosts"
+    is "$output" ".*127.0.0.1\s$con1_name.*" "Container1 name in /etc/hosts"
     # get the length of the hosts file
     old_lines=${#lines[@]}
 
@@ -150,9 +150,13 @@ load helpers
     # new host entry and the old one should be removed (lines check)
     run_podman run --pod $pod_name --name $con2_name $IMAGE cat /etc/hosts
     is "$output" ".*\s$pod_name $infra_name.*" "Pod hostname in /etc/hosts"
-    is "$output" ".*127.0.0.1\s.*$con2_name.*" "Container2 name in /etc/hosts"
+    is "$output" ".*127.0.0.1\s$con2_name.*" "Container2 name in /etc/hosts"
     is "${#lines[@]}" "$old_lines" "Number of hosts lines is equal"
 
+    run_podman run --pod $pod_name  $IMAGE sh -c  "hostname && cat /etc/hostname"
+    is "${lines[0]}" "$pod_name" "hostname is the pod hostname"
+    is "${lines[1]}" "$pod_name" "/etc/hostname contains correct pod hostname"
+
     run_podman pod rm $pod_name
     is "$output" "$pid" "Only ID in output (no extra errors)"
 }