usr.bin/checkpt/checkpt.c

   1 /*-
   2  * Copyright (c) 2003 Kip Macy All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  23  * SUCH DAMAGE.
  24  */
  25
  26 #include <sys/signal.h>
  27 #include <sys/syscall.h>
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30 #include <sys/module.h>
  31 #include <sys/checkpoint.h>
  32
  33 #include <fcntl.h>
  34 #include <signal.h>
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <string.h>
  38 #include <unistd.h>
  39 #include <errno.h>
  40
  41 static
  42 void
  43 usage(const char *prg)
  44 {
  45     fprintf(stderr, "%s -r file.ckpt\n", prg);
  46     exit(1);
  47 }
  48
  49 int
  50 main(int ac, char **av)
  51 {
  52     int fd;
  53     int error;
  54     char ch;
  55     const char *filename = NULL;
  56
  57     while ((ch = getopt(ac, av, "r:")) != -1) {
  58         switch(ch) {
  59         case 'r':
  60             filename = optarg;
  61             break;
  62         default:
  63             usage(av[0]);
  64         }
  65     }
  66     if (filename == NULL)
  67         usage(av[0]);
  68
  69     fd = open(filename, O_RDONLY);
  70     if (fd < 0) {
  71         fprintf(stderr, "unable to open %s\n", filename);
  72         exit(1);
  73     }
  74     error = sys_checkpoint(CKPT_THAW, fd, -1, 1);
  75     if (error)
  76         fprintf(stderr, "thaw failed error %d %s\n", errno, strerror(errno));
  77     else
  78         fprintf(stderr, "Unknown error restoring checkpoint\n");
  79     return(5);
  80 }