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path: root/usr.bin/reboot/reboot.c
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/*
 * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of Hyra nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/reboot.h>
#include <stdio.h>
#include <unistd.h>

#define REBOOT_FLAGS "rhp"
#define REBOOT_FLAG_RB  'r'     /* Reboot */
#define REBOOT_FLAG_HLT 'h'     /* Halt */
#define REBOOT_FLAG_PWR 'p'     /* Power off */

static void
help(void)
{
    printf(
        "reboot: usage: reboot [flags]\n"
        "flags:\n"
        "   [-r] Reboot\n"
        "   [-h] Halt\n"
        "   [-p] Power off\n"
    );
}

int
main(int argc, char **argv)
{
    int c;

    if (argc < 2) {
        help();
        return -1;
    }

    /*
     * Now we parse the args. Every case is a fall through
     * as if one fails (indicated by us returning), another
     * method is attempted.
     */
    while ((c = getopt(argc, argv, REBOOT_FLAGS)) != -1) {
        switch (c) {
        case REBOOT_FLAG_RB:
            cpu_reboot(REBOOT_RESET);
            printf("REBOOT failed\n");
            /* Fall through */
        case REBOOT_FLAG_HLT:
            cpu_reboot(REBOOT_HALT);
            printf("HALT failed\n");
            /* Fall through */
        case REBOOT_FLAG_PWR:
            cpu_reboot(REBOOT_POWEROFF);
            printf("POWEROFF failed\n");
            /* Fall through */
        default:
            printf("got bad flag '%c'\n", c);
            break;
        }
    }

    return 0;
}