Bug 157204

Summary: shell_cmd should use waitpid instead of wait
Product: [Fedora] Fedora Reporter: Francis Montagnac <francis.montagnac>
Component: tcp_wrappersAssignee: Thomas Woerner <twoerner>
Status: CLOSED DUPLICATE QA Contact: David Lawrence <dkl>
Severity: medium Docs Contact:
Priority: medium    
Version: 3   
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Hardware: All   
OS: Linux   
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Last Closed: 2005-05-11 15:08:16 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Francis Montagnac 2005-05-09 12:31:30 UTC 
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.5) Gecko/20041220

Description of problem:

The shell_cmd function in shell_cmd.c does the following loop to
wait for its command to terminate:

  while ((wait_pid = wait((int *) 0)) != -1 && wait_pid != child_pid)

Having now the waitpid primitive, it would be safer to use it instead:

  waitpid(child_pid, (int *) 0, 0)

otherwise an application linked with tcp_wrappers and needing to get
the exit status of its children may fail because of that loop in
shell_cmd, if /etc/hosts.allow is setup to fork a command for this
application.

That happened on our site with am-utils (amd and amq).

Version-Release number of selected component (if applicable):
tcp_wrappers-7.6-37.2.rpm

How reproducible:
Sometimes

Steps to Reproduce:
1. acces to many automount points
2. tell amd to unmount them with "amq -u"
3. repeat 1. end 2.
  

Additional info:
Comment 1 Thomas Woerner 2005-05-11 15:08:16 UTC 

*** This bug has been marked as a duplicate of 156373 ***