[CRIU] [PATCH 1/2] ns: Concretize error reporting in prepare_net_namespaces()

[Kirill Tkhai]

Show more clear, which problem happened: either waitpid() failed
or wrong status was received.

Reported-by: Andrew Vagin <avagin at virtuozzo.com>
Signed-off-by: Kirill Tkhai <ktkhai at virtuozzo.com>
---
 criu/net.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/criu/net.c b/criu/net.c
index 45f6fcee0..ae07ff247 100644
--- a/criu/net.c
+++ b/criu/net.c
@@ -1785,8 +1785,9 @@ int prepare_net_namespaces()
 				pr_perror("Can't clone");
 				goto err;
 			}
+			errno = 0;
 			if (waitpid(pid, &status, 0) != pid || !WIFEXITED(status) || WEXITSTATUS(status)) {
-				pr_perror("Child process waiting %d", status);
+				pr_err("Child waiting: errno=%d, status=%d\n", errno, status);
 				goto err;
 			}
 		} else {