Date: Tue, 25 Mar 1997 15:29:00 +1100 From: Bruce Evans <bde@zeta.org.au> To: cvs-all@freefall.freebsd.org, CVS-committers@freefall.freebsd.org, cvs-lib@freefall.freebsd.org, mpp@freefall.freebsd.org Subject: Re: cvs commit: src/lib/libc/sys sigaction.2 Message-ID: <199703250429.PAA11232@godzilla.zeta.org.au>
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> Modified: lib/libc/sys sigaction.2 > Log: > Change the description of how attempts to block SIGKILL and SIGSTOP > are handled. The system call will actually fail in this case - the > system doesn't silently ignore the request. Closes PR# 3047 > > Pointed out by: fenner Actually, sigaction silently ignores attempts to set the SIGKILL and SIGSTOP bits in the signal mask. This behaviour is fully specified by POSIX. It only fails (in connection with SIGKILL and SIGSTOP) for attempts to set the sigaction handler for SIGKILL or SIGSTOP to anything other than SIG_DFL. (At least in 2.2 and -current. 2.1.x non-POSIXly rejects attempts to even read the sigaction for SIGKILL or SIGSTOP.) Bruce
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