components/disk.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include <errno.h>
   3 #include <stdio.h>
   4 #include <string.h>
   5 #include <sys/statvfs.h>
   6
   7 #include "../util.h"
   8
   9 const char *
  10 disk_free(const char *mnt)
  11 {
  12         struct statvfs fs;
  13
  14         if (statvfs(mnt, &fs) < 0) {
  15                 fprintf(stderr, "statvfs '%s': %s\n", mnt, strerror(errno));
  16                 return NULL;
  17         }
  18
  19         return bprintf("%f",
  20                        (float)fs.f_frsize * (float)fs.f_bavail / 1024 / 1024 / 1024);
  21 }
  22
  23 const char *
  24 disk_perc(const char *mnt)
  25 {
  26         struct statvfs fs;
  27
  28         if (statvfs(mnt, &fs) < 0) {
  29                 fprintf(stderr, "statvfs '%s': %s\n", mnt, strerror(errno));
  30                 return NULL;
  31         }
  32
  33         return bprintf("%d", (int)(100 *
  34                        (1.0f - ((float)fs.f_bavail / (float)fs.f_blocks))));
  35 }
  36
  37 const char *
  38 disk_total(const char *mnt)
  39 {
  40         struct statvfs fs;
  41
  42         if (statvfs(mnt, &fs) < 0) {
  43                 fprintf(stderr, "statvfs '%s': %s\n", mnt, strerror(errno));
  44                 return NULL;
  45         }
  46
  47         return bprintf("%f",
  48                        (float)fs.f_frsize * (float)fs.f_blocks / 1024 / 1024 / 1024);
  49 }
  50
  51 const char *
  52 disk_used(const char *mnt)
  53 {
  54         struct statvfs fs;
  55
  56         if (statvfs(mnt, &fs) < 0) {
  57                 fprintf(stderr, "statvfs '%s': %s\n", mnt, strerror(errno));
  58                 return NULL;
  59         }
  60
  61         return bprintf("%f",
  62                        (float)fs.f_frsize * ((float)fs.f_blocks -
  63                        (float)fs.f_bfree) / 1024 / 1024 / 1024);
  64 }