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_bsize * (float)fs.f_bfree / 1024 / 1024 / 1024);
  21 }
  22
  23 const char *
  24 disk_perc(const char *mnt)
  25 {
  26         int perc;
  27         struct statvfs fs;
  28
  29         if (statvfs(mnt, &fs) < 0) {
  30                 fprintf(stderr, "statvfs '%s': %s\n", mnt, strerror(errno));
  31                 return NULL;
  32         }
  33
  34         perc = 100 * (1.0f - ((float)fs.f_bfree / (float)fs.f_blocks));
  35
  36         return bprintf("%d", perc);
  37 }
  38
  39 const char *
  40 disk_total(const char *mnt)
  41 {
  42         struct statvfs fs;
  43
  44         if (statvfs(mnt, &fs) < 0) {
  45                 fprintf(stderr, "statvfs '%s': %s\n", mnt, strerror(errno));
  46                 return NULL;
  47         }
  48
  49         return bprintf("%f",
  50                        (float)fs.f_bsize * (float)fs.f_blocks / 1024 / 1024 / 1024);
  51 }
  52
  53 const char *
  54 disk_used(const char *mnt)
  55 {
  56         struct statvfs fs;
  57
  58         if (statvfs(mnt, &fs) < 0) {
  59                 fprintf(stderr, "statvfs '%s': %s\n", mnt, strerror(errno));
  60                 return NULL;
  61         }
  62
  63         return bprintf("%f",
  64                        (float)fs.f_bsize * ((float)fs.f_blocks -
  65                        (float)fs.f_bfree) / 1024 / 1024 / 1024);
  66 }