signal.h defines SA_SIGINFO, but it doesn't seem to work; in the following
testcase, hiphup gets info passed as NULL.
#include <signal.h>
#include <stdio.h>
void hiphup(int signo, siginfo_t *info, void *context)
{
if (info == NULL) { printf("info NULL!\n"); return; }
printf("got signal\nsigno: %d, info->si_signo: %d\n",
signo, info->si_signo);
return;
}
int main(int argc, char **argv)
{
struct sigaction act;
act.sa_mask = 0;
act.sa_flags = SA_SIGINFO;
act.sa_sigaction = hiphup;
sigaction(SIGHUP, &act, NULL);
raise(SIGHUP);
return 0;
}
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