tests/res.c

   1 /*!
   2  * \file res.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 <sys/ioctl.h>
  12 #include <fcntl.h>
  13 #include "../src/ckpt.h"
  14
  15 #define CKPT_TEST "testfile"
  16
  17 /*!
  18  * \brief IOCTL wrapper to run kernel-level restart.
  19  * @param[in] fd
  20  * @param[in] pid
  21  * @param[in] flags
  22  * @return < 0 - error, 0 - success
  23  */
  24 int restart(int fd, const char * filename, int pid, int flags)
  25 {
  26         struct ckpt_param param;
  27         int ret, dev_fd;
  28
  29         dev_fd = open(CKPT_DEV_FILE, O_RDONLY);
  30         if (dev_fd<0)
  31                 return dev_fd;
  32
  33         param.fd       = fd;
  34         param.filename = filename;
  35         param.pid      = pid;
  36         param.flags    = flags;
  37
  38         ret = ioctl(dev_fd, CKPT_IOCTL_RESTART, (int)&param);
  39         close(dev_fd);
  40
  41         return ret;
  42 }
  43
  44 int main()
  45 {
  46         int fd, pid;
  47
  48         fd = open(CKPT_TEST, O_RDWR);
  49         if(!fd){
  50                 perror(CKPT_TEST);
  51                 return -1;
  52         }
  53
  54         printf("Restarting...\n");
  55
  56         restart(fd, CKPT_TEST, getpid(),  0);//RESTART_NOTIFY);
  57
  58         close(fd);
  59
  60         return 0;
  61 }