Originální popis anglicky:
ustat - get file system statistics
Návod, kniha: Linux Programmer's Manual
#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.
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.
- 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.
SVr4. SVr4 documents additional error conditions ENOLINK, ECOMM, and EINTR but
has no ENOSYS condition.
ustat is deprecated and has only been provided for compatibility. All new
programs should use
statfs(2) instead.
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.
stat(2),
statfs(2)
