Re: RE: RE: Re: set -e and SIGCHLD

[yyyyyyyyyyyyyyy@xxxxxx]

    From: David Korn <yyy@xxxxxxxxxxxxxxxx>

    The standard does not require that SIG_IGN behave any differently
    than SIG_DFL.  The standard leaves this up to the implementation.

Hm. Until now I think I agreed 100% with what you wrote.
Here I only agree if you mean the old POSIX standard,
not the new draft.

ISO/IEC 9945-1:1996 says in 3.3.1.3:
If a process sets the action for the SIGCHLD signal to SIG_IGN,
the behavior is unspecified.

Thus, Bruce Korb invoked unspecified behaviour according to
the old standard. But the new draft adds a clause (under XSI),
so with XSI conformance one cannot make SIG_IGN behave as SIG_DFL.

Andries