/*
 * Infinite loop test with 900,000 processes
 *
 * Requires system w/ 128GB+ of ram, kern.maxproc=4000000 set in
 * /boot/loader.conf.  80 second stabilization time after last
 * process is forked.
 *
 * Also test tear-down by ^C'ing the test.
 */
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/mman.h>
#include <sys/resource.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>

#define COUNT   900000

int
main(int ac, char **av)
{
        int status;
        int i;
        int j;
        int idno;
        char *path;
        char *id;
        char c;

        if (ac == 1) {
                for (i = 0; i < COUNT; i += 100) {
#if 0
                        asprintf(&path, "cp %s /tmp/x%06d", av[0], i);
                        system(path);
                        free(path);
                        asprintf(&path, "/tmp/x%06d", i);
#else
                        asprintf(&path, "%s", av[0]);
#endif
                        asprintf(&id, "%d", i);
                        if (vfork() == 0) {
                                execl(path, path, id, NULL);
                                _exit(0);
                        }
                        if (i % 1000 == 0) {
                                printf("running %d\r", i);
                                fflush(stdout);
                        }
                        free(path);
                        free(id);
                }
        } else {
                idno = strtol(av[1], NULL, 0);
                setpriority(PRIO_PROCESS, 0, 5);
                for (j = 0; j < 100; ++j) {
                        if (j == 99 || fork() == 0) {
                                int dummy = 0;

                                setpriority(PRIO_PROCESS, 0, 15);
                                sleep(80);

                                while (1) {
                                        ;
                                }
                                _exit(0);
                        }
                }
                while (wait3(NULL, 0, NULL) >= 0 || errno == EINTR)
                        ;
                _exit(0);
        }
        printf("running %d\n", i);
        for (;;) {
                sleep(1);
        }
        return 0;
}