pasta: correctly exit when execvp() fails

By default clone() will create a child that does not send SIGCHLD when
the child exits. The caller has to specifiy the SIGNAL it should get in
the flag bitmask.
see clone(2) under "The child termination signal"

This fixes the problem where pasta would not exit when the execvp()
call failed, i.e. when the command does not exists.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/pasta.c b/pasta.c
index 9169913..d5f90e8 100644
--- a/pasta.c
+++ b/pasta.c
@@ -241,7 +241,7 @@ void pasta_start_ns(struct ctx *c, uid_t uid, gid_t gid,
 	pasta_child_pid = do_clone(pasta_spawn_cmd, ns_fn_stack,
 				   sizeof(ns_fn_stack),
 				   CLONE_NEWIPC | CLONE_NEWPID | CLONE_NEWNET |
-				   CLONE_NEWUTS,
+				   CLONE_NEWUTS | SIGCHLD,
 				   (void *)&arg);
 
 	if (pasta_child_pid == -1) {