tests/ck.c

   1 /*!
   2  * \file ck.c
   3  * - Author: Alejandro Cabrera
   4  * - Date: August 2008
   5  * - Brief: Library interface to CRAK module. Wraps IOCTL
   6  *          functionality in convenient uspace functions.
   7  * - Modifications:
   8  *  - Added doxygen-style documentation.
   9  */
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <sys/ioctl.h>
  13 #include <fcntl.h>
  14 #include "../src/ckpt.h"
  15
  16 #define CKPT_TEST "testfile"
  17
  18 /*!
  19  * \brief IOCTL wrapper to run kernel-level checkpoint.
  20  * @param[in] fd
  21  * @param[in] pid
  22  * @param[in] flags
  23  * @return < 0 - error, 0 - success
  24  */
  25 int checkpoint(int fd, int pid, int flags)
  26 {
  27         struct ckpt_param param;
  28         int ret, dev_fd;
  29
  30         dev_fd = open(CKPT_DEV_FILE, O_RDONLY);
  31         if (dev_fd<0) {
  32                 perror(CKPT_DEV_FILE);
  33                 return dev_fd;
  34         }
  35
  36         param.fd    = fd;
  37         param.pid   = pid;
  38         param.flags = flags;
  39
  40         printf("Sending...\n");
  41         ret = ioctl(dev_fd, CKPT_IOCTL_CHECKPOINT, (int)&param);
  42         printf("Done...\n");
  43         close(dev_fd);
  44         return ret;
  45 }
  46
  47 int main()
  48 {
  49         int fd, pid;
  50
  51         fd = open(CKPT_TEST, O_RDWR);
  52         if(!fd){
  53                 perror(CKPT_TEST);
  54                 return -1;
  55         }
  56
  57         printf("Before ckpt.\n");
  58
  59         checkpoint(fd, getpid(), CKPT_KILL);
  60
  61         printf("After ckpt.\n");
  62
  63         close(fd);
  64
  65         exit(0);
  66 }