Proper behaviour for wait()?

[Valentin Nechayev]

 Fri, May 30, 2003 at 22:00:18, pherman (Paul Herman) wrote about "Proper behaviour for wait()?": 

PH> anyone know what the "proper" behavior for wait() is when SIGCHLD
PH> is ignored?  Is it simply undefined?  Don't see anything mentioned
PH> in the wait(2) manpage one way or tother, and other OSes don't seem
PH> to agree much.

Citing SUSv2:

   SA_NOCLDWAIT
          If set, and sig equals SIGCHLD, child processes of the calling
          processes will not be transformed into zombie processes when
          they terminate. If the calling process subsequently waits for
          its children, and the process has no unwaited for children that
          were transformed into zombie processes, it will block until all
          of its children terminate, and wait(), wait3(), waitid() and
          waitpid() will fail and set errno to [ECHILD]. Otherwise,
          terminating child processes will be transformed into zombie
          processes, unless SIGCHLD is set to SIG_IGN.

The same for SUSv3.


-netch-