mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-04 09:09:56 +00:00
4e1ef62a36
Relnotes: yes
190 lines
2.7 KiB
C
190 lines
2.7 KiB
C
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
#include <sys/types.h>
|
|
#include <signal.h>
|
|
|
|
#include "ntp_syslog.h"
|
|
#include "ntp_stdlib.h"
|
|
|
|
static ctrl_c_fn ctrl_c_hook;
|
|
#ifndef SYS_WINNT
|
|
RETSIGTYPE sigint_handler(int);
|
|
#else
|
|
BOOL WINAPI console_event_handler(DWORD);
|
|
#endif
|
|
|
|
|
|
#ifdef HAVE_SIGACTION
|
|
|
|
# ifdef SA_RESTART
|
|
# define Z_SA_RESTART SA_RESTART
|
|
# else
|
|
# define Z_SA_RESTART 0
|
|
# endif
|
|
|
|
void
|
|
signal_no_reset(
|
|
int sig,
|
|
void (*func)(int)
|
|
)
|
|
{
|
|
int n;
|
|
struct sigaction vec;
|
|
struct sigaction ovec;
|
|
|
|
ZERO(vec);
|
|
sigemptyset(&vec.sa_mask);
|
|
vec.sa_handler = func;
|
|
|
|
/* Added for PPS clocks on Solaris 7 which get EINTR errors */
|
|
# ifdef SIGPOLL
|
|
if (SIGPOLL == sig)
|
|
vec.sa_flags = Z_SA_RESTART;
|
|
# endif
|
|
# ifdef SIGIO
|
|
if (SIGIO == sig)
|
|
vec.sa_flags = Z_SA_RESTART;
|
|
# endif
|
|
|
|
do
|
|
n = sigaction(sig, &vec, &ovec);
|
|
while (-1 == n && EINTR == errno);
|
|
if (-1 == n) {
|
|
perror("sigaction");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
#elif HAVE_SIGVEC
|
|
|
|
void
|
|
signal_no_reset(
|
|
int sig,
|
|
RETSIGTYPE (*func)(int)
|
|
)
|
|
{
|
|
struct sigvec sv;
|
|
int n;
|
|
|
|
ZERO(sv);
|
|
sv.sv_handler = func;
|
|
n = sigvec(sig, &sv, (struct sigvec *)NULL);
|
|
if (-1 == n) {
|
|
perror("sigvec");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
#elif HAVE_SIGSET
|
|
|
|
void
|
|
signal_no_reset(
|
|
int sig,
|
|
RETSIGTYPE (*func)(int)
|
|
)
|
|
{
|
|
int n;
|
|
|
|
n = sigset(sig, func);
|
|
if (-1 == n) {
|
|
perror("sigset");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
#else
|
|
|
|
/* Beware! This implementation resets the signal to SIG_DFL */
|
|
void
|
|
signal_no_reset(
|
|
int sig,
|
|
RETSIGTYPE (*func)(int)
|
|
)
|
|
{
|
|
#ifndef SIG_ERR
|
|
# define SIG_ERR (-1)
|
|
#endif
|
|
if (SIG_ERR == signal(sig, func)) {
|
|
perror("signal");
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
#ifndef SYS_WINNT
|
|
/*
|
|
* POSIX implementation of set_ctrl_c_hook()
|
|
*/
|
|
RETSIGTYPE
|
|
sigint_handler(
|
|
int signum
|
|
)
|
|
{
|
|
UNUSED_ARG(signum);
|
|
if (ctrl_c_hook != NULL)
|
|
(*ctrl_c_hook)();
|
|
}
|
|
|
|
void
|
|
set_ctrl_c_hook(
|
|
ctrl_c_fn c_hook
|
|
)
|
|
{
|
|
RETSIGTYPE (*handler)(int);
|
|
|
|
if (NULL == c_hook) {
|
|
handler = SIG_DFL;
|
|
signal_no_reset(SIGINT, handler);
|
|
ctrl_c_hook = c_hook;
|
|
} else {
|
|
ctrl_c_hook = c_hook;
|
|
handler = &sigint_handler;
|
|
signal_no_reset(SIGINT, handler);
|
|
}
|
|
}
|
|
#else /* SYS_WINNT follows */
|
|
/*
|
|
* Windows implementation of set_ctrl_c_hook()
|
|
*/
|
|
BOOL WINAPI
|
|
console_event_handler(
|
|
DWORD dwCtrlType
|
|
)
|
|
{
|
|
BOOL handled;
|
|
|
|
if (CTRL_C_EVENT == dwCtrlType && ctrl_c_hook != NULL) {
|
|
(*ctrl_c_hook)();
|
|
handled = TRUE;
|
|
} else {
|
|
handled = FALSE;
|
|
}
|
|
|
|
return handled;
|
|
}
|
|
void
|
|
set_ctrl_c_hook(
|
|
ctrl_c_fn c_hook
|
|
)
|
|
{
|
|
BOOL install;
|
|
|
|
if (NULL == c_hook) {
|
|
ctrl_c_hook = NULL;
|
|
install = FALSE;
|
|
} else {
|
|
ctrl_c_hook = c_hook;
|
|
install = TRUE;
|
|
}
|
|
if (!SetConsoleCtrlHandler(&console_event_handler, install))
|
|
msyslog(LOG_ERR, "Can't %s console control handler: %m",
|
|
(install)
|
|
? "add"
|
|
: "remove");
|
|
}
|
|
#endif /* SYS_WINNT */
|