text: #include <sys/statvfs.h>
  
  struct statvfs {
  	unsigned long f_bsize;
  	unsigned long f_frsize;
  	fsblkcnt_t f_blocks;
  	fsblkcnt_t f_bfree;
  	fsblkcnt_t f_bavail;
  	fsfilcnt_t f_files;
  	fsfilcnt_t f_ffree;
  	fsfilcnt_t f_favail;
  	unsigned long f_fsid;
  	unsigned long f_flag;
  	unsigned long f_namemax;
  };
  
  /*
  XOPEN(400)
  POSIX(200809)
  */
  