Copyright (C) 1995, Thomas K. Dyas <firstname.lastname@example.org> %%%LICENSE_START(VERBATIM) Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies. Permission is granted to copy and distribute modified versions of this manual under the conditions for verbatim copying, provided that the entire resulting derived work is distributed under the terms of a permission notice identical to this one. ...
NAMEustat - get filesystem statistics
#include <unistd.h> /* libc */
#include <ustat.h> /* glibc2 */ int ustat(dev_t dev, struct ustat *ubuf);
DESCRIPTIONustat() returns information about a mounted filesystem. dev is a device number identifying a device containing a mounted filesystem. 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; /* Filsys name */ char f_fpack; /* Filsys pack name */
The last two fields, f_fname and f_fpack, are not implemented and will always be filled with null bytes (aq\0aq).
RETURN VALUEOn 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.
- ubuf points outside of your accessible address space.
- dev does not refer to a device containing a mounted filesystem.
- The mounted filesystem referenced by dev does not support this operation, or any version of Linux before 1.3.16.