mirror of
https://github.com/trapexit/mergerfs.git
synced 2024-12-11 19:53:39 +08:00
72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
/*
|
|
FUSE: Filesystem in Userspace
|
|
Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
|
|
|
|
This program can be distributed under the terms of the GNU LGPLv2.
|
|
See the file COPYING.LIB
|
|
*/
|
|
|
|
#include "fuse_lowlevel.h"
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <signal.h>
|
|
|
|
static struct fuse_session *fuse_instance;
|
|
|
|
static void exit_handler(int sig)
|
|
{
|
|
(void) sig;
|
|
if (fuse_instance)
|
|
fuse_session_exit(fuse_instance);
|
|
}
|
|
|
|
static int set_one_signal_handler(int sig, void (*handler)(int), int remove)
|
|
{
|
|
struct sigaction sa;
|
|
struct sigaction old_sa;
|
|
|
|
memset(&sa, 0, sizeof(struct sigaction));
|
|
sa.sa_handler = remove ? SIG_DFL : handler;
|
|
sigemptyset(&(sa.sa_mask));
|
|
sa.sa_flags = 0;
|
|
|
|
if (sigaction(sig, NULL, &old_sa) == -1) {
|
|
perror("fuse: cannot get old signal handler");
|
|
return -1;
|
|
}
|
|
|
|
if (old_sa.sa_handler == (remove ? handler : SIG_DFL) &&
|
|
sigaction(sig, &sa, NULL) == -1) {
|
|
perror("fuse: cannot set signal handler");
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int fuse_set_signal_handlers(struct fuse_session *se)
|
|
{
|
|
if (set_one_signal_handler(SIGHUP, exit_handler, 0) == -1 ||
|
|
set_one_signal_handler(SIGINT, exit_handler, 0) == -1 ||
|
|
set_one_signal_handler(SIGTERM, exit_handler, 0) == -1 ||
|
|
set_one_signal_handler(SIGPIPE, SIG_IGN, 0) == -1)
|
|
return -1;
|
|
|
|
fuse_instance = se;
|
|
return 0;
|
|
}
|
|
|
|
void fuse_remove_signal_handlers(struct fuse_session *se)
|
|
{
|
|
if (fuse_instance != se)
|
|
fprintf(stderr,
|
|
"fuse: fuse_remove_signal_handlers: unknown session\n");
|
|
else
|
|
fuse_instance = NULL;
|
|
|
|
set_one_signal_handler(SIGHUP, exit_handler, 1);
|
|
set_one_signal_handler(SIGINT, exit_handler, 1);
|
|
set_one_signal_handler(SIGTERM, exit_handler, 1);
|
|
set_one_signal_handler(SIGPIPE, SIG_IGN, 1);
|
|
}
|