<ftw.h>(P) POSIX Programmer's Manual <ftw.h>(P)
ftw.h - file tree traversal
The <ftw.h> header shall define the FTW structure that includes at least the following
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():
Directory without read permission.
FTW_DP Directory with subdirectories visited.
FTW_NS Unknown type; stat() failed.
FTW_SL Symbolic link.
Symbolic link that names a nonexistent file.
The <ftw.h> header shall define macros for use as values of the fourth argument to nftw():
Physical walk, does not follow symbolic links. Otherwise, nftw() follows links but
does not walk down any path that crosses itself.
The walk does not cross a mount point.
All subdirectories are visited before the directory itself.
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 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.
<sys/stat.h> , the System Interfaces volume of IEEE Std 1003.1-2001, ftw(), nftw()
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 orig-
inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 <ftw.h>(P)