/*
 * Copyright (c) 2017 Gilles Chehade <gilles@poolp.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 <errno.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>

int
main(int argc, char *argv[])
{
        int ch;
        int ret;

        if (! geteuid())
                errx(1, "mail.mda: may not be executed as root");

        while ((ch = getopt(argc, argv, "")) != -1) {
                switch (ch) {
                default:
                        break;
                }
        }
        argc -= optind;
        argv += optind;

        if (argc == 0)
                errx(1, "mail.mda: command required");

        if (argc > 1)
                errx(1, "mail.mda: only one command is supported");

        /* could not obtain a shell or could not obtain wait status,
         * tempfail */
        if ((ret = system(argv[0])) == -1)
                errx(EX_TEMPFAIL, "%s", strerror(errno));

        /* not exited properly but we have no details,
         * tempfail */
        if (! WIFEXITED(ret))
                exit(EX_TEMPFAIL);

        exit(WEXITSTATUS(ret));
}