block_device.c

   1 #include "internal.h"
   2 #include <dirent.h>
   3 #include <string.h>
   4 #include <stdio.h>
   5
   6 const char      block_device_usage[] = "block_device mount-point";
   7
   8 static dev_t *my_device;
   9 static char *my_device_name;
  10
  11 int
  12 match_mount(const struct FileInfo * i) {
  13         if ( S_ISBLK(i->stat.st_mode)
  14          && (i->stat.st_rdev == *my_device)) {
  15                 my_device_name=strdup(i->source);
  16                 return 1;
  17         } else
  18                 return 0;
  19 }
  20
  21 extern int
  22 block_device_main(struct FileInfo * i, int argc, char * * argv)
  23 {
  24         char *device_name = block_device(argv[1],i);
  25         if ( device_name == NULL )
  26                 return -1;
  27         printf("%s\n", device_name);
  28         exit(0);
  29 }
  30
  31 char * block_device(const char *name, struct FileInfo *i)
  32 {
  33         struct stat     s;
  34         char *buf;
  35         int dinam=0;
  36
  37         if ( stat(name, &s) ) return (char *) NULL;
  38         if (!i) {
  39           i=(struct FileInfo*)malloc(sizeof(struct FileInfo));
  40           dinam = 1;
  41         }
  42         memset((void *)i, 0, sizeof(struct FileInfo));
  43         my_device=(dev_t *)malloc(sizeof(dev_t));
  44         *my_device = s.st_dev;
  45         my_device_name = NULL;
  46         i->source = "/dev";
  47         i->stat = s;
  48         i->processDirectoriesAfterTheirContents=1;
  49         descend(i, match_mount);
  50         if (dinam) free(i);
  51         if ( my_device_name ) {
  52                 buf = strdup(my_device_name);
  53                 free(my_device);
  54                 free(my_device_name);
  55                 return buf;
  56         } else {
  57                 fprintf( stderr
  58                 ,"Can't find special file for block device %d, %d.\n"
  59                 ,(int) *my_device >> 8 & 0xff
  60                 ,(int) *my_device & 0xff);
  61                 free(my_device);
  62                 return (char *) NULL;
  63         }
  64 }