/*------------------------------------------------------------------------- * * pqsignal.c * reliable BSD-style signal(2) routine stolen from RWW who stole it * from Stevens... * * Portions Copyright (c) 1996-2011, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * * IDENTIFICATION * src/interfaces/libpq/pqsignal.c * * NOTES * This shouldn't be in libpq, but the monitor and some other * things need it... * *------------------------------------------------------------------------- */ #include "postgres_fe.h" #include #include "pqsignal.h" 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; #ifdef SA_NOCLDSTOP if (signo == SIGCHLD) act.sa_flags |= SA_NOCLDSTOP; #endif if (sigaction(signo, &act, &oact) < 0) return SIG_ERR; return oact.sa_handler; #endif /* !HAVE_POSIX_SIGNALS */ }