newlib-cygwin/winsup/testsuite/winsup.api/resethand.c

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#include <stdio.h>
#include <signal.h>
#include <sys/wait.h>
#include <unistd.h>
#include <stdlib.h>
int doit = 0;
void
ouch (int sig)
{
if (doit++ > 0)
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kill (getpid (), SIGTERM);
}
int
main (int argc, char **argv)
{
static struct sigaction act;
if (argc == 1)
act.sa_flags = SA_RESETHAND;
act.sa_handler = ouch;
sigaction (SIGSEGV, &act, NULL);
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int pid = fork ();
int status;
if (pid > 0)
waitpid (pid, &status, 0);
else
{
int *i = 0;
*i = 9;
exit (0x42);
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}
status &= ~0x80; // remove core dump flag
printf ("pid %d exited with status %p\n", pid, (void *) status);
exit (argc == 1 ? !(status == SIGSEGV) : !(status == SIGTERM));
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}