Ping locks up if sigmask blocks SIGALRM

[David Coles]

If a parent process has a sigmask set (for example, Apache often does) and it blocks SIGALRM this will prevent ping requests from timing out, causing ping to lock up. If SIGTERM is also masked you will only be able to kill the process with SIGKILL.

This can be fixed by ensuring that the process unmasks the required signals on launch.

ProblemType: Bug
Architecture: amd64
Date: Fri Jan 22 17:37:03 2010
DistroRelease: Ubuntu 9.10
NonfreeKernelModules: openafs nvidia
Package: iputils-ping 3:20071127-1build1
ProcEnviron:
 LANGUAGE=en_AU.UTF-8
 PATH=(custom, user)
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-17.54-generic
SourcePackage: iputils
Uname: Linux 2.6.31-17-generic x86_64