/*      $OpenBSD: pipe.c,v 1.5 2021/10/22 05:03:04 anton Exp $  */

/*
 * Copyright (c) 2019 Anton Lindqvist <anton@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/wait.h>

#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "pipe.h"

static void sighandler(int);
static __dead void usage(void);

sig_atomic_t gotsigpipe = 0;
int infinity = 0;
int verbose = 0;

int
main(int argc, char *argv[])
{
        struct {
                const char *t_name;
                int (*t_fn)(void);
        } tests[] = {
                { "close-race",                         test_close_race },
                { "kqueue-read",                        test_kqueue_read },
                { "kqueue-read-eof",                    test_kqueue_read_eof },
                { "kqueue-write",                       test_kqueue_write },
                { "kqueue-write-eof",                   test_kqueue_write_eof },
                { "ping-pong",                          test_ping_pong },
                { "run-down-write-big",                 test_run_down_write_big },
                { "run-down-write-small",               test_run_down_write_small },
                { "select-hup",                         test_select_hup },
                { "thundering-herd-read-signal",        test_thundering_herd_read_signal },
                { "thundering-herd-read-wakeup",        test_thundering_herd_read_wakeup },
                { "thundering-herd-write-signal",       test_thundering_herd_write_signal },
                { "thundering-herd-write-wakeup",       test_thundering_herd_write_wakeup },

                { NULL, NULL },
        };
        int ch, i;

        while ((ch = getopt(argc, argv, "iv")) != -1) {
                switch (ch) {
                case 'i':
                        infinity = 1;
                        break;
                case 'v':
                        verbose = 1;
                        break;
                default:
                        usage();
                }
        }
        argc -= optind;
        argv += optind;
        if (argc != 1)
                usage();

        if (signal(SIGPIPE, sighandler) == SIG_ERR)
                err(1, "signal");

        for (i = 0; tests[i].t_name != NULL; i++) {
                if (strcmp(argv[0], tests[i].t_name))
                        continue;

                return tests[i].t_fn();
        }
        warnx("%s: no such test", argv[0]);

        return 1;
}

int
xwaitpid(pid_t pid)
{
        int status;

        if (waitpid(pid, &status, 0) == -1)
                err(1, "waitpid");
        if (WIFEXITED(status))
                return WEXITSTATUS(status);
        if (WIFSIGNALED(status))
                return WTERMSIG(status);
        return 0;
}

static void
sighandler(int signo)
{

        gotsigpipe = signo;
}

static __dead void
usage(void)
{

        fprintf(stderr, "usage: pipe [-iv] test-case\n");
        exit(1);
}