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da5aeccf64
We had two copies of this function in the backend and libpq, which was already pretty bogus, but it turns out that we need it in some other programs that don't use libpq (such as pg_test_fsync). So put it where it probably should have been all along. The signal-mask-initialization support in src/backend/libpq/pqsignal.c stays where it is, though, since we only need that in the backend.
120 lines
2.9 KiB
C
120 lines
2.9 KiB
C
/*-------------------------------------------------------------------------
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*
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* pqsignal.c
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* Backend signal(2) support (see also src/port/pqsignal.c)
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*
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* Portions Copyright (c) 1996-2013, 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/backend/libpq/pqsignal.c
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*
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* ------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include "libpq/pqsignal.h"
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#ifdef HAVE_SIGPROCMASK
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sigset_t UnBlockSig,
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BlockSig,
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StartupBlockSig;
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#else
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int UnBlockSig,
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BlockSig,
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StartupBlockSig;
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#endif
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/*
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* Initialize BlockSig, UnBlockSig, and StartupBlockSig.
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*
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* BlockSig is the set of signals to block when we are trying to block
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* signals. This includes all signals we normally expect to get, but NOT
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* signals that should never be turned off.
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*
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* StartupBlockSig is the set of signals to block during startup packet
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* collection; it's essentially BlockSig minus SIGTERM, SIGQUIT, SIGALRM.
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*
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* UnBlockSig is the set of signals to block when we don't want to block
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* signals (is this ever nonzero??)
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*/
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void
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pqinitmask(void)
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{
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#ifdef HAVE_SIGPROCMASK
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sigemptyset(&UnBlockSig);
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/* First set all signals, then clear some. */
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sigfillset(&BlockSig);
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sigfillset(&StartupBlockSig);
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/*
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* Unmark those signals that should never be blocked. Some of these signal
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* names don't exist on all platforms. Most do, but might as well ifdef
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* them all for consistency...
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*/
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#ifdef SIGTRAP
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sigdelset(&BlockSig, SIGTRAP);
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sigdelset(&StartupBlockSig, SIGTRAP);
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#endif
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#ifdef SIGABRT
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sigdelset(&BlockSig, SIGABRT);
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sigdelset(&StartupBlockSig, SIGABRT);
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#endif
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#ifdef SIGILL
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sigdelset(&BlockSig, SIGILL);
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sigdelset(&StartupBlockSig, SIGILL);
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#endif
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#ifdef SIGFPE
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sigdelset(&BlockSig, SIGFPE);
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sigdelset(&StartupBlockSig, SIGFPE);
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#endif
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#ifdef SIGSEGV
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sigdelset(&BlockSig, SIGSEGV);
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sigdelset(&StartupBlockSig, SIGSEGV);
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#endif
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#ifdef SIGBUS
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sigdelset(&BlockSig, SIGBUS);
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sigdelset(&StartupBlockSig, SIGBUS);
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#endif
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#ifdef SIGSYS
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sigdelset(&BlockSig, SIGSYS);
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sigdelset(&StartupBlockSig, SIGSYS);
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#endif
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#ifdef SIGCONT
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sigdelset(&BlockSig, SIGCONT);
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sigdelset(&StartupBlockSig, SIGCONT);
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#endif
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/* Signals unique to startup */
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#ifdef SIGQUIT
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sigdelset(&StartupBlockSig, SIGQUIT);
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#endif
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#ifdef SIGTERM
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sigdelset(&StartupBlockSig, SIGTERM);
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#endif
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#ifdef SIGALRM
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sigdelset(&StartupBlockSig, SIGALRM);
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#endif
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#else
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/* Set the signals we want. */
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UnBlockSig = 0;
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BlockSig = sigmask(SIGQUIT) |
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sigmask(SIGTERM) | sigmask(SIGALRM) |
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/* common signals between two */
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sigmask(SIGHUP) |
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sigmask(SIGINT) | sigmask(SIGUSR1) |
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sigmask(SIGUSR2) | sigmask(SIGCHLD) |
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sigmask(SIGWINCH) | sigmask(SIGFPE);
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StartupBlockSig = sigmask(SIGHUP) |
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sigmask(SIGINT) | sigmask(SIGUSR1) |
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sigmask(SIGUSR2) | sigmask(SIGCHLD) |
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sigmask(SIGWINCH) | sigmask(SIGFPE);
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#endif
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}
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