SIGTERM me!

sigtermme.c

#include <inttypes.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>

char *name;

void term(int signum)
{
	if (name[0] != 'T') {
		strncpy(name, "This process has been SIGTERM'ed once!", 51);
	} else {
		uint32_t count = 2;
		if (name[33] != 'o') {
			sscanf(name+33, "%" SCNu32, &count);
			count++;
		}
		snprintf(name+33, 18, "%" SCNu32 " times!", count);
	}
}

int main(int argc, char **argv)
{
	if (getppid() != 1) {
		if (fork() == 0) {
			char path[256];
			ssize_t len;
			if ((len = readlink("/proc/self/exe", path, sizeof(path)-1)) != -1) {
				path[len] = 0;
				execl(path, "SIGTERM me!                                       ", NULL);
			}
		}

		return 0;
	}

	name = argv[0];

	struct sigaction action;
	memset(&action, 0, sizeof(struct sigaction));
	action.sa_handler = term;
	sigaction(SIGTERM, &action, NULL);

	for (;;) {
		sleep(1);
	}

	return 0;
}