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Update.
2003-11-07 Jakub Jelinek <jakub@redhat.com> * io/ftw.c (NFTW_OLD_NAME, NFTW_NEW_NAME): Define. (ftw_dir, ftw_startup): Add __attribute ((noinline)). (NFTW_OLD_NAME, NFTW_NEW_NAME): New functions. (NFTW_NAME): Only define if !_LIBC, add versioned_symbol and compat_symbol. * io/ftw64.c (NFTW_OLD_NAME, NFTW_NEW_NAME): Define. * io/Versions (libc): Export nftw@@GLIBC_2.3.3 and nftw64@@GLIBC_2.3.3. * io/ftw.h (FTW_ACTIONRETVAL): New flag. (FTW_CONTINUE, FTW_STOP, FTW_SKIP_SUBTREE, FTW_SKIP_SIBLINGS): New. * io/ftw.c (ftw_dir): Add old_dir argument. Clear result if it was FTW_SKIP_SIBLINGS after processing all dir entries. Change cwd back if old_dir != NULL. (process_entry): Adjust caller. Don't change cwd back here. Change FTW_SKIP_SUBTREE result to 0. (ftw_startup): Adjust ftw_dir caller. Clear result if it was FTW_SKIP_SUBTREE or FTW_SKIP_SIBLINGS. * io/ftwtest.c (skip_subtree, skip_siblings): New variables. (options, main): Add --skip-subtree and --skip-siblings options. (cb): Use return FTW_CONTINUE instead of return 0. Handle --skip-subtree and --skip-siblings. * io/ftwtest-sh: Add tests for FTW_ACTIONRETVAL. * manual/filesys.texi: Document FTW_ACTIONRETVAL.
This commit is contained in:
Ulrich Drepper
parent
c685b2b0b4
commit
ca10f33858
27
ChangeLog
27
ChangeLog
@ -1,3 +1,30 @@
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2003-11-07 Jakub Jelinek <jakub@redhat.com>
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* io/ftw.c (NFTW_OLD_NAME, NFTW_NEW_NAME): Define.
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(ftw_dir, ftw_startup): Add __attribute ((noinline)).
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(NFTW_OLD_NAME, NFTW_NEW_NAME): New functions.
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(NFTW_NAME): Only define if !_LIBC, add versioned_symbol
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and compat_symbol.
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* io/ftw64.c (NFTW_OLD_NAME, NFTW_NEW_NAME): Define.
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* io/Versions (libc): Export nftw@@GLIBC_2.3.3
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and nftw64@@GLIBC_2.3.3.
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* io/ftw.h (FTW_ACTIONRETVAL): New flag.
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(FTW_CONTINUE, FTW_STOP, FTW_SKIP_SUBTREE, FTW_SKIP_SIBLINGS): New.
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* io/ftw.c (ftw_dir): Add old_dir argument.
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Clear result if it was FTW_SKIP_SIBLINGS after processing all
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dir entries. Change cwd back if old_dir != NULL.
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(process_entry): Adjust caller. Don't change cwd back here.
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Change FTW_SKIP_SUBTREE result to 0.
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(ftw_startup): Adjust ftw_dir caller.
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Clear result if it was FTW_SKIP_SUBTREE or FTW_SKIP_SIBLINGS.
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* io/ftwtest.c (skip_subtree, skip_siblings): New variables.
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(options, main): Add --skip-subtree and --skip-siblings options.
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(cb): Use return FTW_CONTINUE instead of return 0.
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Handle --skip-subtree and --skip-siblings.
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* io/ftwtest-sh: Add tests for FTW_ACTIONRETVAL.
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* manual/filesys.texi: Document FTW_ACTIONRETVAL.
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2003-11-04 Jakub Jelinek <jakub@redhat.com>
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* io/ftw.c (ftw_dir): Close dir if callback with FTW_D type returns
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@ -93,6 +93,10 @@ libc {
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# l*
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lchmod;
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}
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GLIBC_2.3.3 {
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# n*
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nftw; nftw64;
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}
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GLIBC_PRIVATE {
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# functions which have an additional interface since they are
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# cancelable.
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112
io/ftw.c
112
io/ftw.c
@ -135,6 +135,8 @@ int rpl_lstat (const char *, struct stat *);
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#ifndef FTW_NAME
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# define FTW_NAME ftw
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# define NFTW_NAME nftw
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# define NFTW_OLD_NAME __old_nftw
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# define NFTW_NEW_NAME __new_nftw
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# define INO_T ino_t
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# define STAT stat
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# ifdef _LIBC
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@ -217,7 +219,8 @@ static const int ftw_arr[] =
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/* Forward declarations of local functions. */
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static int ftw_dir (struct ftw_data *data, struct STAT *st) internal_function;
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static int ftw_dir (struct ftw_data *data, struct STAT *st,
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struct dir_data *old_dir) internal_function;
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static int
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@ -415,43 +418,24 @@ process_entry (struct ftw_data *data, struct dir_data *dir, const char *name,
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|| (!find_object (data, &st)
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/* Remember the object. */
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&& (result = add_object (data, &st)) == 0))
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{
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result = ftw_dir (data, &st);
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if (result == 0 && (data->flags & FTW_CHDIR))
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{
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/* Change back to the parent directory. */
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int done = 0;
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if (dir->stream != NULL)
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if (__fchdir (dirfd (dir->stream)) == 0)
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done = 1;
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if (!done)
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{
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if (data->ftw.base == 1)
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{
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if (__chdir ("/") < 0)
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result = -1;
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}
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else
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if (__chdir ("..") < 0)
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result = -1;
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}
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}
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}
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result = ftw_dir (data, &st, dir);
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}
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else
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result = (*data->func) (data->dirbuf, &st, data->cvt_arr[flag],
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&data->ftw);
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}
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if ((data->flags & FTW_ACTIONRETVAL) && result == FTW_SKIP_SUBTREE)
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result = 0;
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return result;
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}
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static int
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__attribute ((noinline))
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internal_function
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ftw_dir (struct ftw_data *data, struct STAT *st)
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ftw_dir (struct ftw_data *data, struct STAT *st, struct dir_data *old_dir)
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{
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struct dir_data dir;
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struct dirent64 *d;
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@ -550,6 +534,9 @@ fail:
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__set_errno (save_err);
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}
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if ((data->flags & FTW_ACTIONRETVAL) && result == FTW_SKIP_SIBLINGS)
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result = 0;
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/* Prepare the return, revert the `struct FTW' information. */
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data->dirbuf[data->ftw.base - 1] = '\0';
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--data->ftw.level;
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@ -559,11 +546,37 @@ fail:
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if (result == 0 && (data->flags & FTW_DEPTH))
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result = (*data->func) (data->dirbuf, st, FTW_DP, &data->ftw);
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if (old_dir
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&& (data->flags & FTW_CHDIR)
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&& (result == 0
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|| ((data->flags & FTW_ACTIONRETVAL)
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&& (result != -1 && result != FTW_STOP))))
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{
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/* Change back to the parent directory. */
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int done = 0;
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if (old_dir->stream != NULL)
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if (__fchdir (dirfd (old_dir->stream)) == 0)
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done = 1;
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if (!done)
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{
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if (data->ftw.base == 1)
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{
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if (__chdir ("/") < 0)
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result = -1;
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}
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else
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if (__chdir ("..") < 0)
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result = -1;
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}
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}
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return result;
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}
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static int
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__attribute ((noinline))
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internal_function
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ftw_startup (const char *dir, int is_nftw, void *func, int descriptors,
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int flags)
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@ -683,7 +696,7 @@ ftw_startup (const char *dir, int is_nftw, void *func, int descriptors,
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result = add_object (&data, &st);
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if (result == 0)
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result = ftw_dir (&data, &st);
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result = ftw_dir (&data, &st, NULL);
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}
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else
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{
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@ -693,6 +706,10 @@ ftw_startup (const char *dir, int is_nftw, void *func, int descriptors,
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&data.ftw);
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}
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}
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if ((flags & FTW_ACTIONRETVAL)
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&& (result == FTW_SKIP_SUBTREE || result == FTW_SKIP_SIBLINGS))
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result = 0;
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}
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/* Return to the start directory (if necessary). */
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@ -726,6 +743,7 @@ FTW_NAME (path, func, descriptors)
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return ftw_startup (path, 0, func, descriptors, 0);
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}
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#ifndef _LIBC
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int
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NFTW_NAME (path, func, descriptors, flags)
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const char *path;
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@ -735,3 +753,43 @@ NFTW_NAME (path, func, descriptors, flags)
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{
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return ftw_startup (path, 1, func, descriptors, flags);
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}
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#else
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#include <shlib-compat.h>
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int
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NFTW_NEW_NAME (path, func, descriptors, flags)
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const char *path;
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NFTW_FUNC_T func;
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int descriptors;
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int flags;
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{
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if (flags
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& ~(FTW_PHYS | FTW_MOUNT | FTW_CHDIR | FTW_DEPTH | FTW_ACTIONRETVAL))
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{
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__set_errno (EINVAL);
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return -1;
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}
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return ftw_startup (path, 1, func, descriptors, flags);
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}
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versioned_symbol (libc, NFTW_NEW_NAME, NFTW_NAME, GLIBC_2_3_3);
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#if SHLIB_COMPAT(libc, GLIBC_2_1, GLIBC_2_3_3)
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/* Older nftw* version just ignored all unknown flags. */
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int
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NFTW_OLD_NAME (path, func, descriptors, flags)
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const char *path;
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NFTW_FUNC_T func;
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int descriptors;
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int flags;
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{
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flags &= (FTW_PHYS | FTW_MOUNT | FTW_CHDIR | FTW_DEPTH);
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return ftw_startup (path, 1, func, descriptors, flags);
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}
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compat_symbol (libc, NFTW_OLD_NAME, NFTW_NAME, GLIBC_2_1);
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#endif
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#endif
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26
io/ftw.h
26
io/ftw.h
@ -74,8 +74,34 @@ enum
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# define FTW_CHDIR FTW_CHDIR
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FTW_DEPTH = 8 /* Report files in directory before directory itself.*/
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# define FTW_DEPTH FTW_DEPTH
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# ifdef __USE_GNU
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,
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FTW_ACTIONRETVAL = 16 /* Assume callback to return FTW_* values instead of
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zero to continue and non-zero to terminate. */
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# define FTW_ACTIONRETVAL FTW_ACTIONRETVAL
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# endif
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};
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#ifdef __USE_GNU
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/* Return values from callback functions. */
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enum
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{
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FTW_CONTINUE = 0, /* Continue with next sibling or for FTW_D with the
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first child. */
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# define FTW_CONTINUE FTW_CONTINUE
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FTW_STOP = 1, /* Return from `ftw' or `nftw' with FTW_STOP as return
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value. */
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# define FTW_STOP FTW_STOP
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FTW_SKIP_SUBTREE = 2, /* Only meaningful for FTW_D: Don't walk through the
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subtree, instead just continue with its next
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sibling. */
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# define FTW_SKIP_SUBTREE FTW_SKIP_SUBTREE
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FTW_SKIP_SIBLINGS = 3,/* Continue with FTW_DP callback for current directory
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(if FTW_DEPTH) and then its siblings. */
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# define FTW_SKIP_SIBLINGS FTW_SKIP_SIBLINGS
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};
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#endif
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/* Structure used for fourth argument to callback function for `nftw'. */
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struct FTW
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{
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@ -20,6 +20,8 @@
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#define FTW_NAME ftw64
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#define NFTW_NAME nftw64
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#define NFTW_OLD_NAME __old_nftw64
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#define NFTW_NEW_NAME __new_nftw64
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#define INO_T ino64_t
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#define STAT stat64
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#define LXSTAT __lxstat64
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@ -202,6 +202,83 @@ succeeded
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EOF
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rm $testout
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mkdir $tmpdir/foo/lvl1b
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echo > $tmpdir/foo/lvl1b/file@1b
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echo > $tmpdir/foo/lvl1b/file2@1b
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echo > $tmpdir/foo/lvl1b/file3@1b
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LD_LIBRARY_PATH=$objpfx $ldso $testprogram --skip-subtree=lvl1 $tmpdir |
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sort > $testout
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cat <<EOF | diff -u $testout - || exit 1
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base = "/tmp/", file = "ftwtest.d", flag = FTW_D, level = 0
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base = "/tmp/ftwtest.d/", file = "bar", flag = FTW_D, level = 1
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base = "/tmp/ftwtest.d/", file = "baz", flag = FTW_F, level = 1
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base = "/tmp/ftwtest.d/", file = "foo", flag = FTW_D, level = 1
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base = "/tmp/ftwtest.d/bar/", file = "xo", flag = FTW_F, level = 2
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base = "/tmp/ftwtest.d/foo/", file = "lvl1", flag = FTW_D, level = 2
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base = "/tmp/ftwtest.d/foo/", file = "lvl1b", flag = FTW_D, level = 2
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base = "/tmp/ftwtest.d/foo/lvl1b/", file = "file2@1b", flag = FTW_F, level = 3
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base = "/tmp/ftwtest.d/foo/lvl1b/", file = "file3@1b", flag = FTW_F, level = 3
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base = "/tmp/ftwtest.d/foo/lvl1b/", file = "file@1b", flag = FTW_F, level = 3
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EOF
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rm $testout
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LD_LIBRARY_PATH=$objpfx $ldso $testprogram --skip-siblings=lvl1 $tmpdir |
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sort > $testout
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# The filesystem is not required to put lvl1 before lvl1b.
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# If lvl1b comes after lvl1, it shouldn't be printed, while if it
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# comes before, it should.
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catcmd=cat
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[ -n "`ls -U $tmpdir/foo/ | sed -n '/lvl1$/,${/lvl1b$/p}'`" ] \
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&& catcmd="grep -v lvl1b"
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$catcmd <<EOF | diff -u $testout - || exit 1
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base = "/tmp/", file = "ftwtest.d", flag = FTW_D, level = 0
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base = "/tmp/ftwtest.d/", file = "bar", flag = FTW_D, level = 1
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base = "/tmp/ftwtest.d/", file = "baz", flag = FTW_F, level = 1
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base = "/tmp/ftwtest.d/", file = "foo", flag = FTW_D, level = 1
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base = "/tmp/ftwtest.d/bar/", file = "xo", flag = FTW_F, level = 2
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base = "/tmp/ftwtest.d/foo/", file = "lvl1", flag = FTW_D, level = 2
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base = "/tmp/ftwtest.d/foo/", file = "lvl1b", flag = FTW_D, level = 2
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base = "/tmp/ftwtest.d/foo/lvl1b/", file = "file2@1b", flag = FTW_F, level = 3
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base = "/tmp/ftwtest.d/foo/lvl1b/", file = "file3@1b", flag = FTW_F, level = 3
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base = "/tmp/ftwtest.d/foo/lvl1b/", file = "file@1b", flag = FTW_F, level = 3
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EOF
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rm $testout
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LD_LIBRARY_PATH=$objpfx $ldso $testprogram --skip-siblings=file@1b $tmpdir |
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sort > $testout
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# The filesystem is not required to put file2@1b and file3@1b after file@1b.
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# If file[23]@1b come after file@1b, it shouldn't be printed, while if they
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# come before, they should.
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regexp=`echo $(ls -U /tmp/ftwtest.d/foo/lvl1b \
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| sed -n '/file@1b$/,${/file[23]@1b$/p}') | sed 's, ,|,'`
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catcmd=cat
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[ -n "$regexp" ] && catcmd="egrep -v $regexp"
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$catcmd <<EOF | diff -u $testout - || exit 1
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base = "/tmp/", file = "ftwtest.d", flag = FTW_D, level = 0
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base = "/tmp/ftwtest.d/", file = "bar", flag = FTW_D, level = 1
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base = "/tmp/ftwtest.d/", file = "baz", flag = FTW_F, level = 1
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base = "/tmp/ftwtest.d/", file = "foo", flag = FTW_D, level = 1
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base = "/tmp/ftwtest.d/bar/", file = "xo", flag = FTW_F, level = 2
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base = "/tmp/ftwtest.d/foo/", file = "lvl1", flag = FTW_D, level = 2
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base = "/tmp/ftwtest.d/foo/", file = "lvl1b", flag = FTW_D, level = 2
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base = "/tmp/ftwtest.d/foo/lvl1/", file = "file@1", flag = FTW_F, level = 3
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base = "/tmp/ftwtest.d/foo/lvl1/", file = "link@1", flag = FTW_SLN, level = 3
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base = "/tmp/ftwtest.d/foo/lvl1/", file = "lvl2", flag = FTW_D, level = 3
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base = "/tmp/ftwtest.d/foo/lvl1/lvl2/", file = "file@2", flag = FTW_F, level = 4
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base = "/tmp/ftwtest.d/foo/lvl1/lvl2/", file = "lvl3", flag = FTW_D, level = 4
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base = "/tmp/ftwtest.d/foo/lvl1/lvl2/lvl3/", file = "file@3", flag = FTW_F, level = 5
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base = "/tmp/ftwtest.d/foo/lvl1b/", file = "file2@1b", flag = FTW_F, level = 3
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base = "/tmp/ftwtest.d/foo/lvl1b/", file = "file3@1b", flag = FTW_F, level = 3
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base = "/tmp/ftwtest.d/foo/lvl1b/", file = "file@1b", flag = FTW_F, level = 3
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EOF
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rm $testout
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rm -fr $tmpdir
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exit 0
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31
io/ftwtest.c
31
io/ftwtest.c
@ -12,12 +12,16 @@ int do_depth;
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int do_chdir;
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int do_phys;
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int do_exit;
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char *skip_subtree;
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char *skip_siblings;
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struct option options[] =
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{
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{ "depth", no_argument, &do_depth, 1 },
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{ "chdir", no_argument, &do_chdir, 1 },
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{ "phys", no_argument, &do_phys, 1 },
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{ "skip-subtree", required_argument, NULL, 't' },
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{ "skip-siblings", required_argument, NULL, 's' },
|
||||
{ "early-exit", no_argument, &do_exit, 1 },
|
||||
{ NULL, 0, NULL, 0 }
|
||||
};
|
||||
@ -38,7 +42,7 @@ static int
|
||||
cb (const char *name, const struct stat *st, int flag, struct FTW *f)
|
||||
{
|
||||
if (do_exit && strcmp (name + f->base, "file@2"))
|
||||
return 0;
|
||||
return FTW_CONTINUE;
|
||||
|
||||
printf ("base = \"%.*s\", file = \"%s\", flag = %s",
|
||||
f->base, name, name + f->base, flag2name[flag]);
|
||||
@ -49,7 +53,14 @@ cb (const char *name, const struct stat *st, int flag, struct FTW *f)
|
||||
free (cwd);
|
||||
}
|
||||
printf (", level = %d\n", f->level);
|
||||
return do_exit ? 26 : 0;
|
||||
|
||||
if (skip_siblings && strcmp (name + f->base, skip_siblings) == 0)
|
||||
return FTW_SKIP_SIBLINGS;
|
||||
|
||||
if (skip_subtree && strcmp (name + f->base, skip_subtree) == 0)
|
||||
return FTW_SKIP_SUBTREE;
|
||||
|
||||
return do_exit ? 26 : FTW_CONTINUE;
|
||||
}
|
||||
|
||||
int
|
||||
@ -61,7 +72,12 @@ main (int argc, char *argv[])
|
||||
mtrace ();
|
||||
|
||||
while ((opt = getopt_long_only (argc, argv, "", options, NULL)) != -1)
|
||||
;
|
||||
{
|
||||
if (opt == 't')
|
||||
skip_subtree = optarg;
|
||||
else if (opt == 's')
|
||||
skip_siblings = optarg;
|
||||
}
|
||||
|
||||
if (do_chdir)
|
||||
flag |= FTW_CHDIR;
|
||||
@ -69,6 +85,15 @@ main (int argc, char *argv[])
|
||||
flag |= FTW_DEPTH;
|
||||
if (do_phys)
|
||||
flag |= FTW_PHYS;
|
||||
if (skip_subtree || skip_siblings)
|
||||
{
|
||||
flag |= FTW_ACTIONRETVAL;
|
||||
if (do_exit)
|
||||
{
|
||||
printf ("--early-exit cannot be used together with --skip-{siblings,subtree}");
|
||||
exit (1);
|
||||
}
|
||||
}
|
||||
|
||||
char *cw1 = getcwd (NULL, 0);
|
||||
|
||||
|
||||
@ -918,6 +918,17 @@ If this option is specified then all subdirectories and files within
|
||||
them are processed before processing the top directory itself
|
||||
(depth-first processing). This also means the type flag given to the
|
||||
callback function is @code{FTW_DP} and not @code{FTW_D}.
|
||||
@item FTW_ACTIONRETVAL
|
||||
If this option is specified then return values from callbacks
|
||||
are handled differently. If the callback returns @code{FTW_CONTINUE},
|
||||
walking continues normally. @code{FTW_STOP} means walking stops
|
||||
and @code{FTW_STOP} is returned to the caller. If @code{FTW_SKIP_SUBTREE}
|
||||
is returned by the callback with @code{FTW_D} argument, the subtree
|
||||
is skipped and walking continues with next sibling of the directory.
|
||||
If @code{FTW_SKIP_SIBLINGS} is returned by the callback, all siblings
|
||||
of the current entry are skipped and walking continues in its parent.
|
||||
No other return values should be returned from the callbacks if
|
||||
this option is set. This option is a GNU extension.
|
||||
@end vtable
|
||||
|
||||
The return value is computed in the same way as for @code{ftw}.
|
||||
|
||||
Loading…
Reference in New Issue
Block a user