ftw.h
Section: POSIX Programmer's Manual (0P)
Updated: 2017
Page Index
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This manual page is part of the POSIX Programmer's Manual.
The Linux implementation of this interface may differ (consult
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or the interface may not be implemented on Linux.
NAME
ftw.h
--- file tree traversal
SYNOPSIS
#include <ftw.h>
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>.
The following sections are informative.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
<sys_stat.h>
The System Interfaces volume of POSIX.1-2017,
ftw(),
nftw()
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 .