ustat: získat statistiku systému souborů

Originální popis anglicky: ustat - get file system statistics

Návod, kniha: Linux Programmer's Manual

STRUČNĚ

#include <sys/types.h>
 
#include <unistd.h>    /* libc[45] */
 
#include <ustat.h>     /* glibc2 */
 
int ustat(dev_t dev, struct ustat *ubuf);

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 NUL characters.

NÁVRATOVÁ HODNOTA

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 appropriately.

CHYBY / ERRORY

EFAULT: ubuf points outside of your accessible address space.

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

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

ODPOVÍDAJÍCÍ

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

NOTES

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

HP NOTES

The HP version of struct ustat has an additional field f_blksize that is unknown elsewhere. HP warns: For some file systems, the number of free inodes does not change. Such file systems will return -1 in the field f_tinode. For some file systems, inodes are dynamically allocated. Such file systems will return the current number of free inodes.

SOUVISEJÍCÍ

stat(2), statfs(2)

2003-08-04

Linux 2.4