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Viewing changes to src/interfaces/libpq/pqsignal.c

  • Committer: Bazaar Package Importer
  • Author(s): Martin Pitt
  • Date: 2009-03-20 12:00:13 UTC
  • Revision ID: james.westby@ubuntu.com-20090320120013-hogj7egc5mjncc5g
Tags: upstream-8.4~0cvs20090328
Import upstream version 8.4~0cvs20090328

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src/interfaces/libpq/pqsignal.c
 
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/*-------------------------------------------------------------------------
 
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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) 1996-2009, 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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 *        $PostgreSQL$
 
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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 "pqsignal.h"
 
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#include <signal.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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}