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: InitializeWaitEventSupport() 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(), InitializeWaitEventSupport(), IoWorkerMain(), PgArchiverMain(), PostgresMain(), PostmasterMain(), pqinitmask(), ReplSlotSyncWorkerMain(), StartupProcessMain(), SysLoggerMain(), WalReceiverMain(), WalSummarizerMain(), and WalWriterMain().