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NAME

       ftw.h - file tree traversal

SYNOPSIS

       #include <ftw.h>

DESCRIPTION

       The  <ftw.h>  header  shall  define  the FTW structure that includes at
       least the following members:

              int  base
              int  level

       The <ftw.h> header shall define macros for use as values of  the  third
       argument  to  the  application-supplied  function that is passed as the
       second argument to ftw() and nftw():

       FTW_F  File.

       FTW_D  Directory.

       FTW_DNR
              Directory without read permission.

       FTW_DP Directory with subdirectories visited.

       FTW_NS Unknown type; stat() failed.

       FTW_SL Symbolic link.

       FTW_SLN
              Symbolic link that names a nonexistent file.

       The <ftw.h> header shall define macros for use as values of the  fourth
       argument to nftw():

       FTW_PHYS
              Physical walk, does not follow symbolic links. Otherwise, nftw()
              follows links but does not  walk  down  any  path  that  crosses
              itself.

       FTW_MOUNT
              The walk does not cross a mount point.

       FTW_DEPTH
              All subdirectories are visited before the directory itself.

       FTW_CHDIR
              The walk changes to each directory before reading it.

       The following shall be declared as functions and may also be defined as
       macros. Function prototypes shall be provided.

              int ftw(const char *, int (*)(const char *, const struct stat *,
                  int), int);
              int nftw(const char *, int (*)(const char *, const struct stat *,
                  int, struct FTW*), int, int);

       The <ftw.h> header shall define the stat  structure  and  the  symbolic
       names  for  st_mode  and  the  file  type  test  macros as described in
       <sys/stat.h> .

       Inclusion of the <ftw.h> header may also make visible all symbols  from
       <sys/stat.h>.

       The following sections are informative.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       <sys/stat.h>  ,  the  System Interfaces volume of IEEE Std 1003.1-2001,
       ftw(), nftw()

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 .