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 that includes 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 fsblkcnt_t and fsfilcnt_t types shall be defined as described in <sys/types.h> .

       The following flags for the f_flag member shall be defined:

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

       The following sections are informative.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       <sys/types.h>   ,  the  System  Interfaces  volume  of  IEEE Std 1003.1-2001,  fstatvfs(),
       statvfs()

COPYRIGHT

       Portions of this text are reprinted and  reproduced  in  electronic  form  from  IEEE  Std
       1003.1,  2003  Edition,  Standard  for Information Technology -- Portable Operating System
       Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003  by
       the  Institute  of  Electrical  and  Electronics Engineers, Inc and The Open Group. 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.opengroup.org/unix/online.html .