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Allow libpq to do thread-safe SIGPIPE handling. This allows it to

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ignore SIGPIPE from send() in libpq, but terminate on any other SIGPIPE,
unless the user installs their own signal handler.

This is a minor fix because the only time you get SIGPIPE from libpq's
send() is when the backend dies.
This commit is contained in:
Bruce Momjian
2004-01-09 02:02:43 +00:00
parent acc57543de
commit 0150dbdce5
9 changed files with 167 additions and 12 deletions
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24
src/interfaces/libpq/pqsignal.c
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@@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/interfaces/libpq/pqsignal.c,v 1.18 2003/11/29 19:52:12 pgsql Exp $
* $PostgreSQL: pgsql/src/interfaces/libpq/pqsignal.c,v 1.19 2004/01/09 02:02:43 momjian Exp $
*
* NOTES
* This shouldn't be in libpq, but the monitor and some other
@@ -40,3 +40,25 @@ pqsignal(int signo, pqsigfunc func)
return oact.sa_handler;
#endif /* !HAVE_POSIX_SIGNALS */
}
pqsigfunc
pqsignalinquire(int signo)
{
#if !defined(HAVE_POSIX_SIGNALS)
pqsigfunc old_sigfunc;
int old_sigmask;
/* Prevent signal handler calls during test */
old_sigmask = sigblock(sigmask(signo));
old_sigfunc = signal(signo, SIG_DFL);
signal(signo, old_sigfunc);
sigblock(old_sigmask);
return old_sigfunc;
#else
struct sigaction oact;
if (sigaction(signo, NULL, &oact) < 0)
return SIG_ERR;
return oact.sa_handler;
#endif /* !HAVE_POSIX_SIGNALS */
}