ustat

USTAT(2)                   Linux Programmer's Manual                  USTAT(2)



NAME
       ustat - get file system statistics

SYNOPSIS
       #include <sys/types.h>
       #include <unistd.h>    /* libc[45] */
       #include <ustat.h>     /* glibc2 */

       int ustat(dev_t dev, struct ustat *ubuf);

DESCRIPTION
       ustat returns information about a mounted file system.  dev is a device
       number identifying a device containing a mounted file system.  ubuf  is
       a pointer to a ustat structure that contains the following members:


              daddr_t f_tfree;                /* Total free blocks */
              ino_t   f_tinode;               /* Number of free inodes */
              char    f_fname[6];             /* Filsys name */
              char    f_fpack[6];             /* Filsys pack name */


       The  last two fields, f_fname and f_fpack, are not implemented and will
       always be filled with null characters.

RETURN VALUE
       On success, zero is returned and the ustat structure pointed to by ubuf
       will  be  filled in.  On error, -1 is returned, and errno is set appro-
       priately.

ERRORS
       EINVAL dev does not refer to a device containing a mounted file system.

       EFAULT ubuf points outside of your accessible address space.

       ENOSYS The  mounted file system referenced by dev does not support this
              operation, or any version of Linux before 1.3.16.

NOTES
       ustat has only been provided for compatibility. All new programs should
       use statfs(2) instead.

CONFORMING TO
       SVr4.   SVr4  documents additional error conditions ENOLINK, ECOMM, and
       EINTR but has no ENOSYS condition.

SEE ALSO
       statfs(2), stat(2)



Linux 1.3.16                      1995-08-09                          USTAT(2)