misc/partinfo.c

   1 /*
   2  * partinfo.c
   3  *
   4  * Originally written by Alain Knaff, <alknaff@innet.lu>.
   5  *
   6  * Cleaned up by Theodore Ts'o, <tytso@mit.edu>.
   7  *
   8  */
   9
  10 #include <sys/types.h>
  11 #include <fcntl.h>
  12 #include <stdio.h>
  13 #include <linux/fs.h>
  14 #include <linux/hdreg.h>
  15 #include <unistd.h>
  16 #include <stdlib.h>
  17
  18 void print_error(char *operation, int error, char *device)
  19 {
  20         fprintf(stderr, "%s failed for %s: %s\n", operation, device,
  21                 strerror(error));
  22 }
  23
  24 int main(int argc, char **argv)
  25 {
  26         struct hd_geometry loc;
  27         int fd, i;
  28         long size;
  29
  30         if (argc == 1) {
  31                 fprintf(stderr, "Usage: %s <dev1> <dev2> <dev3>\n\n"
  32                         "This program prints out the partition information "
  33                         "for a set of devices\n"
  34                         "A common way to use this progrma is:\n\n\t"
  35                         "%s /dev/hda?\n\n", argv[0], argv[0]);
  36                 exit(1);
  37         }
  38
  39         for (i=1; i < argc; i++) {
  40                 fd = open(argv[i], O_RDONLY);
  41
  42                 if (fd < 0) {
  43                         print_error("open", errno, argv[1]);
  44                         continue;
  45                 }
  46
  47                 if (ioctl(fd, HDIO_GETGEO, &loc) < 0) {
  48                         print_error("HDIO_GETGEO ioctl", errno, argv[1]);
  49                         close(fd);
  50                         continue;
  51                 }
  52
  53
  54                 if (ioctl(fd, BLKGETSIZE, &size) < 0) {
  55                         print_error("BLKGETSIZE ioctl", errno, argv[1]);
  56                         close(fd);
  57                         continue;
  58                 }
  59
  60                 printf("%s: h=%3d s=%3d c=%4d   start=%8d size=%8d end=%8d\n",
  61                        argv[i],
  62                        loc.heads, (int)loc.sectors, loc.cylinders,
  63                        (int)loc.start, size, (int) loc.start + size -1);
  64                 close(fd);
  65         }
  66         exit(0);
  67 }