136 lines
2.0 KiB
C
136 lines
2.0 KiB
C
/* $NetBSD: syssignal.c,v 1.2 2003/12/04 16:23:37 drochner Exp $ */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdio.h>
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#include <sys/types.h>
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#include <signal.h>
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#include "ntp_syslog.h"
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#include "ntp_stdlib.h"
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#ifdef HAVE_SIGACTION
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void
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signal_no_reset(
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#if defined(__STDC__) || defined(HAVE_STDARG_H)
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int sig,
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void (*func) (int)
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#else
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sig, func
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#endif
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)
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#if defined(__STDC__) || defined(HAVE_STDARG_H)
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#else
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int sig;
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void (*func) P((int));
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#endif
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{
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int n;
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struct sigaction vec;
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vec.sa_handler = func;
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sigemptyset(&vec.sa_mask);
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#if 0
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#ifdef SA_RESTART
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vec.sa_flags = SA_RESTART;
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#else
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vec.sa_flags = 0;
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#endif
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#else
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vec.sa_flags = 0;
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#endif
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#ifdef SA_RESTART
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/* Added for PPS clocks on Solaris 7 which get EINTR errors */
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# ifdef SIGPOLL
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if (sig == SIGPOLL) vec.sa_flags = SA_RESTART;
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# endif
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# ifdef SIGIO
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if (sig == SIGIO) vec.sa_flags = SA_RESTART;
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# endif
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#endif
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while (1)
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{
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struct sigaction ovec;
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n = sigaction(sig, &vec, &ovec);
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if (n == -1 && errno == EINTR) continue;
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if (ovec.sa_flags
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#ifdef SA_RESTART
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&& ovec.sa_flags != SA_RESTART
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#endif
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)
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msyslog(LOG_DEBUG, "signal_no_reset: signal %d had flags %x",
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sig, ovec.sa_flags);
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break;
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}
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if (n == -1) {
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perror("sigaction");
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exit(1);
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}
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}
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#elif HAVE_SIGVEC
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void
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signal_no_reset(
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int sig,
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RETSIGTYPE (*func) (int)
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)
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{
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struct sigvec sv;
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int n;
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bzero((char *) &sv, sizeof(sv));
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sv.sv_handler = func;
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n = sigvec(sig, &sv, (struct sigvec *)NULL);
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if (n == -1) {
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perror("sigvec");
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exit(1);
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}
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}
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#elif HAVE_SIGSET
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void
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signal_no_reset(
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int sig,
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RETSIGTYPE (*func) (int)
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)
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{
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int n;
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n = sigset(sig, func);
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if (n == -1) {
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perror("sigset");
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exit(1);
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}
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}
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#else
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/* Beware! This implementation resets the signal to SIG_DFL */
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void
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signal_no_reset(
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int sig,
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RETSIGTYPE (*func) (int)
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)
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{
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#ifdef SIG_ERR
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if (SIG_ERR == signal(sig, func)) {
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#else
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int n;
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n = signal(sig, func);
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if (n == -1) {
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#endif
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perror("signal");
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exit(1);
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}
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}
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#endif
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