ftw.h man page

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.

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.

See Also

<sys_stat.h>

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

Info

2013 IEEE/The Open Group POSIX Programmer's Manual