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+'\" et
+.TH sys_statvfs.h "0P" 2013 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.SH 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.
+
+.SH NAME
+sys/statvfs.h
+\(em VFS File System information structure
+.SH SYNOPSIS
+.LP
+.nf
+#include <sys/statvfs.h>
+.fi
+.SH DESCRIPTION
+The
+.IR <sys/statvfs.h> 
+header shall define the
+.BR statvfs
+structure, which shall include at least the following members:
+.sp
+.RS 4
+.nf
+\fB
+unsigned long f_bsize    \fRFile system block size.\fR
+unsigned long f_frsize   \fRFundamental file system block size.\fR
+fsblkcnt_t    f_blocks   \fRTotal number of blocks on file system in units of \fIf_frsize.\fR
+fsblkcnt_t    f_bfree    \fRTotal number of free blocks.\fR
+fsblkcnt_t    f_bavail   \fRNumber of free blocks available to\fR
+                         \fRnon-privileged process.\fR
+fsfilcnt_t    f_files    \fRTotal number of file serial numbers.\fR
+fsfilcnt_t    f_ffree    \fRTotal number of free file serial numbers.\fR
+fsfilcnt_t    f_favail   \fRNumber of file serial numbers available to\fR
+                         \fRnon-privileged process.\fR
+unsigned long f_fsid     \fRFile system ID.\fR
+unsigned long f_flag     \fRBit mask of \fIf_flag\fR values.\fR
+unsigned long f_namemax  \fRMaximum filename length.\fR
+.fi \fR
+.P
+.RE
+.P
+The
+.IR <sys/statvfs.h> 
+header shall define the
+.BR fsblkcnt_t
+and
+.BR fsfilcnt_t
+types as described in
+.IR <sys/types.h> .
+.P
+The
+.IR <sys/statvfs.h> 
+header shall define the following symbolic constants for the
+.IR f_flag
+member:
+.IP ST_RDONLY 12
+Read-only file system.
+.IP ST_NOSUID 12
+Does not support the semantics of the ST_ISUID and ST_ISGID file mode
+bits.
+.P
+The following shall be declared as functions and may also be defined as
+macros. Function prototypes shall be provided.
+.sp
+.RS 4
+.nf
+\fB
+int fstatvfs(int, struct statvfs *);
+int statvfs(const char *restrict, struct statvfs *restrict);
+.fi \fR
+.P
+.RE
+.LP
+.IR "The following sections are informative."
+.SH "APPLICATION USAGE"
+None.
+.SH RATIONALE
+None.
+.SH "FUTURE DIRECTIONS"
+None.
+.SH "SEE ALSO"
+.IR "\fB<sys_types.h>\fP"
+.P
+The System Interfaces volume of POSIX.1\(hy2008,
+.IR "\fIfstatvfs\fR\^(\|)"
+.SH 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 .