This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface

Application Usage

       None.

Copyright

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard
       for  Information  Technology  --  Portable  Operating  System  Interface  (POSIX),  The  Open  Group Base
       Specifications Issue 7, 2018 Edition, Copyright (C) 2018 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 .

       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 .

IEEE/The Open Group                                   2017                                         ftw.h(7POSIX)

Description

       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 function 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 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>.

       Thefollowingsectionsareinformative.

Future Directions

       None.

Name

       ftw.h — file tree traversal

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.