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Diffstat (limited to 'src/backend/libpq/pqsignal.c')
| -rw-r--r-- | src/backend/libpq/pqsignal.c | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/src/backend/libpq/pqsignal.c b/src/backend/libpq/pqsignal.c deleted file mode 100644 index d485c01797b..00000000000 --- a/src/backend/libpq/pqsignal.c +++ /dev/null @@ -1,151 +0,0 @@ -/*------------------------------------------------------------------------- - * - * pqsignal.c - * reliable BSD-style signal(2) routine stolen from RWW who stole it - * from Stevens... - * - * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group - * Portions Copyright (c) 1994, Regents of the University of California - * - * - * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/libpq/pqsignal.c,v 1.26 2002/06/20 20:29:28 momjian Exp $ - * - * NOTES - * This shouldn't be in libpq, but the monitor and some other - * things need it... - * - * A NOTE ABOUT SIGNAL HANDLING ACROSS THE VARIOUS PLATFORMS. - * - * pg_config.h defines the macro HAVE_POSIX_SIGNALS for some platforms and - * not for others. This file and pqsignal.h use that macro to decide - * how to handle signalling. - * - * signal(2) handling - this is here because it affects some of - * the frontend commands as well as the backend server. - * - * Ultrix and SunOS provide BSD signal(2) semantics by default. - * - * SVID2 and POSIX signal(2) semantics differ from BSD signal(2) - * semantics. We can use the POSIX sigaction(2) on systems that - * allow us to request restartable signals (SA_RESTART). - * - * Some systems don't allow restartable signals at all unless we - * link to a special BSD library. - * - * We devoutly hope that there aren't any systems that provide - * neither POSIX signals nor BSD signals. The alternative - * is to do signal-handler reinstallation, which doesn't work well - * at all. - * ------------------------------------------------------------------------*/ -#include "postgres.h" - -#include <signal.h> - -#include "libpq/pqsignal.h" - - -/* - * Initialize BlockSig, UnBlockSig, and AuthBlockSig. - * - * BlockSig is the set of signals to block when we are trying to block - * signals. This includes all signals we normally expect to get, but NOT - * signals that should never be turned off. - * - * AuthBlockSig is the set of signals to block during authentication; - * it's essentially BlockSig minus SIGTERM, SIGQUIT, SIGALRM. - * - * UnBlockSig is the set of signals to block when we don't want to block - * signals (is this ever nonzero??) - */ -void -pqinitmask(void) -{ -#ifdef HAVE_SIGPROCMASK - sigemptyset(&UnBlockSig); - sigfillset(&BlockSig); - sigfillset(&AuthBlockSig); - - /* - * 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(&AuthBlockSig, SIGTRAP); -#endif -#ifdef SIGABRT - sigdelset(&BlockSig, SIGABRT); - sigdelset(&AuthBlockSig, SIGABRT); -#endif -#ifdef SIGILL - sigdelset(&BlockSig, SIGILL); - sigdelset(&AuthBlockSig, SIGILL); -#endif -#ifdef SIGFPE - sigdelset(&BlockSig, SIGFPE); - sigdelset(&AuthBlockSig, SIGFPE); -#endif -#ifdef SIGSEGV - sigdelset(&BlockSig, SIGSEGV); - sigdelset(&AuthBlockSig, SIGSEGV); -#endif -#ifdef SIGBUS - sigdelset(&BlockSig, SIGBUS); - sigdelset(&AuthBlockSig, SIGBUS); -#endif -#ifdef SIGSYS - sigdelset(&BlockSig, SIGSYS); - sigdelset(&AuthBlockSig, SIGSYS); -#endif -#ifdef SIGCONT - sigdelset(&BlockSig, SIGCONT); - sigdelset(&AuthBlockSig, SIGCONT); -#endif -#ifdef SIGTERM - sigdelset(&AuthBlockSig, SIGTERM); -#endif -#ifdef SIGQUIT - sigdelset(&AuthBlockSig, SIGQUIT); -#endif -#ifdef SIGALRM - sigdelset(&AuthBlockSig, SIGALRM); -#endif -#else - UnBlockSig = 0; - BlockSig = sigmask(SIGHUP) | sigmask(SIGQUIT) | - sigmask(SIGTERM) | sigmask(SIGALRM) | - sigmask(SIGINT) | sigmask(SIGUSR1) | - sigmask(SIGUSR2) | sigmask(SIGCHLD) | - sigmask(SIGWINCH) | sigmask(SIGFPE); - AuthBlockSig = sigmask(SIGHUP) | - sigmask(SIGINT) | sigmask(SIGUSR1) | - sigmask(SIGUSR2) | sigmask(SIGCHLD) | - sigmask(SIGWINCH) | sigmask(SIGFPE); -#endif -} - - -/* - * Set up a signal handler - */ -pqsigfunc -pqsignal(int signo, pqsigfunc func) -{ -#if !defined(HAVE_POSIX_SIGNALS) - return signal(signo, func); -#else - struct sigaction act, - oact; - - act.sa_handler = func; - sigemptyset(&act.sa_mask); - act.sa_flags = 0; - if (signo != SIGALRM) - act.sa_flags |= SA_RESTART; - if (sigaction(signo, &act, &oact) < 0) - return SIG_ERR; - return oact.sa_handler; -#endif /* !HAVE_POSIX_SIGNALS */ -} |