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

       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.

       ftw.h — file tree traversal

       #include <ftw.h>

       The <ftw.h> header shall define the FTW structure, which shall  include
       at least the following members:

	   int	base
	   int	level

       The  <ftw.h>  header  shall define the following symbolic constants for
       use as values of the third argument to the  application-supplied	 func‐
       tion that is passed as the second argument to ftw() and nftw():

       FTW_F	     Non-directory 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 the following symbolic constants 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

       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

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

       The following sections are informative.





       The System Interfaces volume of POSIX.1‐2008, ftw(), nftw()

       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			     ftw.h(0P)

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