.\" Copyright (C) 1995, Thomas K. Dyas .\" .\" 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this one .\" .\" Since the Linux kernel and libraries are constantly changing, this .\" manual page may be incorrect or out-of-date. The author(s) assume no .\" responsibility for errors or omissions, or for damages resulting from .\" the use of the information contained herein. The author(s) may not .\" have taken the same level of care in the production of this manual, .\" which is licensed free of charge, as they might when working .\" professionally. .\" .\" Formatted or processed versions of this manual, if unaccompanied by .\" the source, must acknowledge the copyright and authors of this work. .\" .\" Created Wed Aug 9 1995 Thomas K. Dyas .\" Modified Fri Jan 31 23:52:21 1997 by Eric S. Raymond .\" .TH USTAT 2 "9 August 1995" "Linux 1.3.16" "Linux Programmer's Manual" .SH NAME ustat \- get file system statistics .SH SYNOPSIS .nf .B #include .sp .BI "int ustat(dev_t " dev ", struct ustat * " ubuf ); .SH DESCRIPTION .B ustat returns information about a mounted file system. .I dev is a device number identifying a device containing a mounted file system. .I ubuf is a pointer to a ustat structure that contains the following members: .sp .RS .nf .ne 7 .ta 8n 16n 32n 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 */ .ta .fi .RE .PP The last two fields, f_fname and f_fpack, are not implemented and will always be filled with null characters. .SH "RETURN VALUE" On success, zero is returned and the ustat structure pointed to by .I ubuf will be filled in. On error, \-1 is returned, and .I errno is set appropriately. .SH ERRORS .TP .B EINVAL .I dev does not refer to a device containing a mounted file system. .TP .B EFAULT .I ubuf points outside of your accessible address space. .TP .B ENOSYS The mounted file system referenced by .I dev does not support this operation, or any version of Linux before 1.3.16. .SH NOTES .B ustat has only been provided for compatibility. All new programs should use .BR statfs (2) instead. .SH "CONFORMING TO" SVr4. SVr4 documents additional error conditions ENOLINK, ECOMM, and EINTR but has no ENOSYS condition. .SH "SEE ALSO" .BR statfs "(2), " stat (2)