#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <sys/reboot.h>
#include <klibc/compiler.h>

static __noreturn usage(void)
{
       static char mesg[] = "Usage: {halt|reboot|poweroff} [-n]\n";
       write(2, mesg, sizeof(mesg) - 1);
       exit(1);
}

int main(int argc, char *argv[])
{
       int cmd = 0; /* initalize to shut gcc up */
       int do_sync = 1;
       char *ptr, *ptr2;

       /* Which action (program name)? */
       ptr2 = ptr = argv[0];
       while (*ptr2)
               if (*ptr2++ == '/')
                       ptr = ptr2;
       if (*ptr == 'r')
               cmd = LINUX_REBOOT_CMD_RESTART;
       else if (*ptr == 'h')
               cmd = LINUX_REBOOT_CMD_HALT;
       else if (*ptr == 'p')
               cmd = LINUX_REBOOT_CMD_POWER_OFF;
       else
               usage();

       /* Walk options */
       while (*++argv && **argv == '-')
               switch (*++*argv) {
                       case 'f': break; /* -f assumed */
                       case 'n': do_sync = 0; break;
                       default:
                               usage();
               }
       if (*argv)
               usage(); /* any args == error */

       if (do_sync)
               sync();
       reboot(LINUX_REBOOT_CMD_CAD_OFF); /* Enable CTRL+ALT+DEL */
       if (!reboot(cmd)) {
               /* Success. Currently, CMD_HALT returns, so stop the world */
               /* kill(-1, SIGSTOP); */
               kill(getpid(), SIGSTOP);
       }
       write(2, "failed.\n", 8);
       return 1;
}