обход дерева файлов (file tree traversal)
Пролог (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.
Имя (Name)
ftw.h — file tree traversal
Синопсис (Synopsis)
#include <ftw.h>
Описание (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.
Использование в приложениях (Application usage)
None.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
None.
Смотри также (See also)
sys_stat.h(0p)
The System Interfaces volume of POSIX.1‐2017, ftw(3p), nftw(3p)
