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sys_statvfs.h(0P)	   POSIX Programmer's Manual	     sys_statvfs.h(0P)

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  con‐
       stants 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 Electri‐
       cal  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.ker‐
       nel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group		     2013		     sys_statvfs.h(0P)
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