#include <stdlib.h>

#include <string.h>

#include <errno.h>

#include <signal.h>

#include <time.h>

#include <sys/types.h>

#include <sys/wait.h>

#include <sys/time.h>

#include <sys/resource.h>

#include <unistd.h>

#include "test.h"

static void handler(int s)

{

}

static int start(char *wrap, char *argv[])

{

	int pid;

	pid = fork();

	if (pid == 0) {

		t_setrlim(RLIMIT_STACK, 100*1024);

		if (*wrap) {

			argv--;

			argv[0] = wrap;

		}

		execvp(argv[0], argv);

		t_error("%s exec failed: %s\n", argv[0], strerror(errno));

		exit(1);

	}

	return pid;

}

static void usage(char *argv[])

{

	t_error("usage: %s [-t timeoutsec] [-w wrapcmd] cmd [args..]\n", argv[0]);

	exit(-1);

}

int main(int argc, char *argv[])

{

	char *wrap = "";

	int timeoutsec = 5;

	int timeout = 0;

	int status;

	sigset_t set;

	int opt;

	int pid;

	while ((opt = getopt(argc, argv, "w:t:")) != -1) {

		switch (opt) {

		case 'w':

			wrap = optarg;

			break;

		case 't':

			timeoutsec = atoi(optarg);

			break;

		default:

			usage(argv);

		}

	}

	if (optind >= argc)

		usage(argv);

	argv += optind;

	sigemptyset(&set);

	sigaddset(&set, SIGCHLD);

	sigprocmask(SIG_BLOCK, &set, 0);

	signal(SIGCHLD, handler);

	pid = start(wrap, argv);

	if (pid == -1) {

		t_error("%s fork failed: %s\n", argv[0], strerror(errno));

		t_printf("FAIL %s [internal]\n", argv[0]);

		return -1;

	}

	if (sigtimedwait(&set, 0, &(struct timespec){timeoutsec,0}) == -1) {

		if (errno == EAGAIN)

			timeout = 1;

		else

			t_error("%s sigtimedwait failed: %s\n", argv[0], strerror(errno));

		if (kill(pid, SIGKILL) == -1)

			t_error("%s kill failed: %s\n", argv[0], strerror(errno));

	}

	if (waitpid(pid, &status, 0) != pid) {

		t_error("%s waitpid failed: %s\n", argv[0], strerror(errno));

		t_printf("FAIL %s [internal]\n", argv[0]);

		return -1;

	}

	if (WIFEXITED(status)) {

		if (WEXITSTATUS(status) == 0)

			return t_status;

		t_printf("FAIL %s [status %d]\n", argv[0], WEXITSTATUS(status));

	} else if (timeout) {

		t_printf("FAIL %s [timed out]\n", argv[0]);

	} else if (WIFSIGNALED(status)) {

		t_printf("FAIL %s [signal %s]\n", argv[0], strsignal(WTERMSIG(status)));

	} else

		t_printf("FAIL %s [unknown]\n", argv[0]);

	return 1;

}