hello,
I'm a student and we are working on FreeBSD.
My problem is i don't understand how to use SA_SIGINFO and siginfo_t.
The following code caught my SIGUSR1 with a "kill -30 my_server_pid"
from my shell.
but siginfo_t is empty when i'm debugging my program with gdb.
my output is :
> pid 0
and in gdb i have :
{
si_signo = 30,
si_errno = 0,
si_code = 0,
si_pid = 0,
si_uid = 0,
si_status = 0,
si_addr = 0x2,
si_value = {sigval_int = 0,sigval_ptr = 0x0},
si_band = 0,
__spare__ = {0, 0, 0, 0, 0, 0, 0}
}
anyone have an idea why my siginfo_t is empty please ?
Here is my code:
#include <sys/types.h>
#include <unistd.h>
#include <signal.h>
#include <stdio.h>
static void addtrue(int sig, siginfo_t *info, void *ctx)
{
printf("pid %i\n", info->si_pid);
}
static void init_server()
{
struct sigaction test;
memset(&test, 0, sizeof(test));
test.sa_flags = SA_SIGINFO;
test.sa_sigaction = addtrue;
sigaction(SIGUSR1, &test, NULL);
getchar();
}
int main()
{
printf("my pid: %i\n", getpid());
init_server();
return (0);
}
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