50 lines
1.1 KiB
C
50 lines
1.1 KiB
C
/*-------------------------------------------------------------------------
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*
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* pqsignal.c
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* reliable BSD-style signal(2) routine stolen from RWW who stole it
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* from Stevens...
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*
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* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* src/interfaces/libpq/pqsignal.c
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*
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* NOTES
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* This shouldn't be in libpq, but the monitor and some other
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* things need it...
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres_fe.h"
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#include <signal.h>
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#include "pqsignal.h"
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pqsigfunc
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pqsignal(int signo, pqsigfunc func)
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{
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#if !defined(HAVE_POSIX_SIGNALS)
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return signal(signo, func);
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#else
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struct sigaction act,
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oact;
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act.sa_handler = func;
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sigemptyset(&act.sa_mask);
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act.sa_flags = 0;
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if (signo != SIGALRM)
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act.sa_flags |= SA_RESTART;
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#ifdef SA_NOCLDSTOP
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if (signo == SIGCHLD)
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act.sa_flags |= SA_NOCLDSTOP;
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#endif
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if (sigaction(signo, &act, &oact) < 0)
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return SIG_ERR;
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return oact.sa_handler;
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#endif /* !HAVE_POSIX_SIGNALS */
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}
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