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sys_statvfs.h

Section: POSIX Programmer's Manual (0P)
Updated: 2013
Index Return to Main Contents
 

PROLOG

This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

 

NAME

sys/statvfs.h --- VFS File System information structure  

SYNOPSIS

#include <sys/statvfs.h>
 

DESCRIPTION

The <sys/statvfs.h> header shall define the statvfs structure, which shall include at least the following members:


unsigned long f_bsize    File system block size.
unsigned long f_frsize   Fundamental file system block size.
fsblkcnt_t    f_blocks   Total number of blocks on file system in units of f_frsize.
fsblkcnt_t    f_bfree    Total number of free blocks.
fsblkcnt_t    f_bavail   Number of free blocks available to
                         non-privileged process.
fsfilcnt_t    f_files    Total number of file serial numbers.
fsfilcnt_t    f_ffree    Total number of free file serial numbers.
fsfilcnt_t    f_favail   Number of file serial numbers available to
                         non-privileged process.
unsigned long f_fsid     File system ID.
unsigned long f_flag     Bit mask of f_flag values.
unsigned long f_namemax  Maximum filename length.
The <sys/statvfs.h> header shall define the fsblkcnt_t and fsfilcnt_t types as described in <sys/types.h>. The <sys/statvfs.h> header shall define the following symbolic constants for the f_flag member:
ST_RDONLY
Read-only file system.
ST_NOSUID
Does not support the semantics of the ST_ISUID and ST_ISGID file mode bits. The following shall be declared as functions and may also be defined as macros. Function prototypes shall be provided.


int fstatvfs(int, struct statvfs *);
int statvfs(const char *restrict, struct statvfs *restrict);

The following sections are informative.  

APPLICATION USAGE

None.  

RATIONALE

None.  

FUTURE DIRECTIONS

None.  

SEE ALSO

<sys_types.h> The System Interfaces volume of POSIX.1-2008, fstatvfs()  

COPYRIGHT

Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C) 2013 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.unix.org/online.html .

Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .


 

Index

PROLOG
NAME
SYNOPSIS
DESCRIPTION
APPLICATION USAGE
RATIONALE
FUTURE DIRECTIONS
SEE ALSO
COPYRIGHT


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