mirror of
https://github.com/facebookexperimental/reverie.git
synced 2025-02-10 14:14:01 +00:00
65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
|
/*
|
||
|
|
* Copyright (c) Facebook, Inc. and its affiliates.
|
||
|
|
*
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* This source code is licensed under the BSD-style license found in the
|
||
|
|
* LICENSE file in the root directory of this source tree.
|
||
|
|
*/
|
||
|
|
#include <errno.h>
|
||
|
|
#include <signal.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <sys/syscall.h>
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
|
||
|
|
#define assert(b) \
|
||
|
|
if (!(b)) \
|
||
|
|
abort();
|
||
|
|
|
||
|
|
static volatile int quit = 0;
|
||
|
|
|
||
|
|
static void handler(int sig, siginfo_t* info, void* ucontext) {
|
||
|
|
static char msg[64];
|
||
|
|
quit = 1;
|
||
|
|
size_t n = snprintf(msg, 64, "[OK] received signal %u\n", info->si_signo);
|
||
|
|
write(STDOUT_FILENO, msg, n);
|
||
|
|
}
|
||
|
|
|
||
|
|
int main(int argc, char* argv[]) {
|
||
|
|
int ret;
|
||
|
|
sigset_t sigset;
|
||
|
|
struct sigaction old, new;
|
||
|
|
|
||
|
|
memset(&old, 0, sizeof(old));
|
||
|
|
memset(&new, 0, sizeof(new));
|
||
|
|
|
||
|
|
sigemptyset(&sigset);
|
||
|
|
new.sa_sigaction = handler;
|
||
|
|
new.sa_mask = sigset;
|
||
|
|
new.sa_flags = SA_RESTART | SA_SIGINFO;
|
||
|
|
|
||
|
|
ret = sigaction(SIGALRM, &new, NULL);
|
||
|
|
if (ret < 0) {
|
||
|
|
perror("rt_sigaction");
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = sigaction(SIGALRM, NULL, &old);
|
||
|
|
if (ret < 0) {
|
||
|
|
perror("rt_sigaction");
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
assert((unsigned long)old.sa_sigaction == (unsigned long)handler);
|
||
|
|
|
||
|
|
alarm(1);
|
||
|
|
|
||
|
|
while (!quit)
|
||
|
|
;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|