package/utils/fitblk/src/fitblk.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 #include <stdio.h>
   3 #include <errno.h>
   4 #include <fcntl.h>
   5 #include <string.h>
   6 #include <unistd.h>
   7 #include <sys/ioctl.h>
   8 #include <linux/fitblk.h>
   9
  10 static int fitblk_release(char *device)
  11 {
  12         int fd, ret;
  13
  14         fd = open(device, O_RDONLY);
  15         if (fd == -1)
  16                 return errno;
  17
  18         ret = ioctl(fd, FITBLK_RELEASE, NULL);
  19         close(fd);
  20
  21         if (ret == -1)
  22                 return errno;
  23
  24         return 0;
  25 }
  26
  27 int main(int argc, char *argp[])
  28 {
  29         int ret;
  30
  31         if (argc != 2) {
  32                 fprintf(stderr, "Release uImage.FIT sub-image block device\n");
  33                 fprintf(stderr, "Syntax: %s /dev/fitXXX\n", argp[0]);
  34                 return -EINVAL;
  35         }
  36
  37         ret = fitblk_release(argp[1]);
  38         if (ret)
  39                 fprintf(stderr, "fitblk: error releasing %s: %s\n", argp[1],
  40                         strerror(ret));
  41         else
  42                 fprintf(stderr, "fitblk: %s released\n", argp[1]);
  43
  44         return ret;
  45 }