text: /* See LICENSE file for copyright and license details. */
  #include <errno.h>
  #include <stdio.h>
  #include <string.h>
  #include <sys/statvfs.h>
  
  #include "../util.h"
  
  const char *
  disk_free(const char *mnt)
  {
  	struct statvfs fs;
  
  	if (statvfs(mnt, &fs) < 0) {
  		fprintf(stderr, "statvfs '%s': %s\n", mnt, strerror(errno));
  		return NULL;
  	}
  
  	return bprintf("%.0f",
  	               (float)fs.f_bsize * (float)fs.f_bavail / 1024 / 1024 / 1024);
  }
  
  const char *
  disk_perc(const char *mnt)
  {
  	int perc;
  	struct statvfs fs;
  
  	if (statvfs(mnt, &fs) < 0) {
  		fprintf(stderr, "statvfs '%s': %s\n", mnt, strerror(errno));
  		return NULL;
  	}
  
  	perc = 100 * (1.0f - ((float)fs.f_bfree / (float)fs.f_blocks));
  
  	return bprintf("%d", perc);
  }
  
  const char *
  disk_total(const char *mnt)
  {
  	struct statvfs fs;
  
  	if (statvfs(mnt, &fs) < 0) {
  		fprintf(stderr, "statvfs '%s': %s\n", mnt, strerror(errno));
  		return NULL;
  	}
  
  	return bprintf("%f",
  	               (float)fs.f_bsize * (float)fs.f_blocks / 1024 / 1024 / 1024);
  }
  
  const char *
  disk_used(const char *mnt)
  {
  	struct statvfs fs;
  
  	if (statvfs(mnt, &fs) < 0) {
  		fprintf(stderr, "statvfs '%s': %s\n", mnt, strerror(errno));
  		return NULL;
  	}
  
  	return bprintf("%f",
  	               (float)fs.f_bsize * ((float)fs.f_blocks -
  	               (float)fs.f_bfree) / 1024 / 1024 / 1024);
  }
  