pqsignal.c File Reference

#include "postgres.h"
#include "libpq/pqsignal.h"

Include dependency graph for pqsignal.c:

Go to the source code of this file.

Functions
void	pqinitmask (void)

Variables
sigset_t	UnBlockSig
sigset_t	BlockSig
sigset_t	StartupBlockSig

Function Documentation

pqinitmask()

void pqinitmask

(

void

)

Definition at line 41 of file pqsignal.c.

{
    sigemptyset(&UnBlockSig);
 
    /* Note: InitializeLatchSupport() modifies UnBlockSig. */
 
    /* First set all signals, then clear some. */
    sigfillset(&BlockSig);
    sigfillset(&StartupBlockSig);
 
    /*
     * Unmark those signals that should never be blocked. Some of these signal
     * names don't exist on all platforms.  Most do, but might as well ifdef
     * them all for consistency...
     */
#ifdef SIGTRAP
    sigdelset(&BlockSig, SIGTRAP);
    sigdelset(&StartupBlockSig, SIGTRAP);
#endif
#ifdef SIGABRT
    sigdelset(&BlockSig, SIGABRT);
    sigdelset(&StartupBlockSig, SIGABRT);
#endif
#ifdef SIGILL
    sigdelset(&BlockSig, SIGILL);
    sigdelset(&StartupBlockSig, SIGILL);
#endif
#ifdef SIGFPE
    sigdelset(&BlockSig, SIGFPE);
    sigdelset(&StartupBlockSig, SIGFPE);
#endif
#ifdef SIGSEGV
    sigdelset(&BlockSig, SIGSEGV);
    sigdelset(&StartupBlockSig, SIGSEGV);
#endif
#ifdef SIGBUS
    sigdelset(&BlockSig, SIGBUS);
    sigdelset(&StartupBlockSig, SIGBUS);
#endif
#ifdef SIGSYS
    sigdelset(&BlockSig, SIGSYS);
    sigdelset(&StartupBlockSig, SIGSYS);
#endif
#ifdef SIGCONT
    sigdelset(&BlockSig, SIGCONT);
    sigdelset(&StartupBlockSig, SIGCONT);
#endif
 
/* Signals unique to startup */
#ifdef SIGQUIT
    sigdelset(&StartupBlockSig, SIGQUIT);
#endif
#ifdef SIGTERM
    sigdelset(&StartupBlockSig, SIGTERM);
#endif
#ifdef SIGALRM
    sigdelset(&StartupBlockSig, SIGALRM);
#endif
}

References BlockSig, SIGABRT, SIGALRM, SIGCONT, SIGQUIT, SIGTRAP, StartupBlockSig, and UnBlockSig.

Referenced by InitPostmasterChild(), InitStandaloneProcess(), and PostmasterMain().

Variable Documentation

BlockSig

sigset_t BlockSig

Definition at line 23 of file pqsignal.c.

Referenced by BackendInitialize(), BackgroundWorkerBlockSignals(), bgworker_die(), dsm_impl_posix_resize(), fork_process(), InitPostmasterChild(), InitStandaloneProcess(), PostmasterMain(), pqinitmask(), and quickdie().

StartupBlockSig

sigset_t StartupBlockSig

Definition at line 24 of file pqsignal.c.

Referenced by BackendInitialize(), and pqinitmask().

UnBlockSig

sigset_t UnBlockSig

Definition at line 22 of file pqsignal.c.

Referenced by AbortSubTransaction(), AbortTransaction(), AutoVacLauncherMain(), AutoVacWorkerMain(), BackgroundWorkerUnblockSignals(), BackgroundWriterMain(), CheckpointerMain(), InitializeLatchSupport(), PgArchiverMain(), PostgresMain(), PostmasterMain(), pqinitmask(), StartupProcessMain(), SysLoggerMain(), WalReceiverMain(), and WalWriterMain().