/*      $OpenBSD: realpath.c,v 1.1 2021/10/13 15:04:53 kn Exp $ */
/*
 * Copyright (c) 2021 Klemens Nanni <kn@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 <err.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

void __dead
usage(void)
{
        fprintf(stderr, "usage: %s [-q] file\n", getprogname());
        exit(1);
}

int
main(int argc, char *argv[])
{
        int ch, qflag = 0;
        char *buf;

        if (pledge("stdio rpath", NULL) == -1)
                err(1, "pledge");

        while ((ch = getopt(argc, argv, "q")) != -1) {
                switch (ch) {
                case 'q':
                        qflag = 1;
                        break;
                default:
                        usage();
                }
        }
        argc -= optind;
        argv += optind;
        if (argc != 1)
                usage();

        buf = realpath(argv[0], NULL);
        if (buf == NULL) {
                if (qflag)
                        return (1);
                err(1, "%s", argv[0]);
        }

        printf("%s\n", buf);
        return (0);
}