[PATCH pmg-api 1/3] pmgpolicy: fix failing run_command in children

[Dominik Csapak <d.csapak@proxmox.com>]

Net::Server::PreForkSimple installs a handler for that in the parent
which reaps all children automatically with `waitpid(-1, ...)` and this
gets copied over on fork. Normally, the default `run_child` method sets
this back to the default, but in pmgpolicy that is overwritten and not
all signal handlers are set correctly.

This handler with its waitpid will be called before the one in
`run_command` which results in an error there.

To fix this, simply do what the default `run_child` does and set SIGCHLD
to 'DEFAULT'.

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
---
 src/bin/pmgpolicy | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/bin/pmgpolicy b/src/bin/pmgpolicy
index d7d440c..31bffe7 100755
--- a/src/bin/pmgpolicy
+++ b/src/bin/pmgpolicy
@@ -1002,6 +1002,8 @@ sub run_child {
         exit;
     };
 
+    $SIG{'CHLD'} = 'DEFAULT';
+
     delete $prop->{children};
 
     $self->child_init_hook;
-- 
2.47.3