ustat(2)

get file system statistics

From the original Amiga UNIX 2.1 manual. Some things it mentions may not be in this release.

NAME

ustat - get file system statistics

SYNOPSIS

#include <sys/types.h>
#include <ustat.h>

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

DESCRIPTION

ustat returns information about a mounted file system. dev is a device number identifying a device containing a mounted file system [see mkdev(3C)]. buf is a pointer to a ustat structure that includes the following elements:

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 */

ustat fails if one or more of the following are true:

EINVAL dev is not the device number of a device containing a mounted file system.

EFAULT buf points outside the process's allocated address space.

EINTR A signal was caught during a ustat system call.

ENOLINK dev is on a remote machine and the link to that machine is no longer active.

ECOMM dev is on a remote machine and the link to that machine is no longer active.

NOTES

ustat will be phased out in favor of the statvfs function.

DIAGNOSTICS