+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.
+
2003-11-04 Jakub Jelinek <jakub@redhat.com>
* io/ftw.c (ftw_dir): Close dir if callback with FTW_D type returns
# l*
lchmod;
}
+ GLIBC_2.3.3 {
+ # n*
+ nftw; nftw64;
+ }
GLIBC_PRIVATE {
# functions which have an additional interface since they are
# cancelable.
#ifndef FTW_NAME
# define FTW_NAME ftw
# define NFTW_NAME nftw
+# define NFTW_OLD_NAME __old_nftw
+# define NFTW_NEW_NAME __new_nftw
# define INO_T ino_t
# define STAT stat
# ifdef _LIBC
/* Forward declarations of local functions. */
-static int ftw_dir (struct ftw_data *data, struct STAT *st) internal_function;
+static int ftw_dir (struct ftw_data *data, struct STAT *st,
+ struct dir_data *old_dir) internal_function;
static int
|| (!find_object (data, &st)
/* Remember the object. */
&& (result = add_object (data, &st)) == 0))
- {
- result = ftw_dir (data, &st);
-
- if (result == 0 && (data->flags & FTW_CHDIR))
- {
- /* Change back to the parent directory. */
- int done = 0;
- if (dir->stream != NULL)
- if (__fchdir (dirfd (dir->stream)) == 0)
- done = 1;
-
- if (!done)
- {
- if (data->ftw.base == 1)
- {
- if (__chdir ("/") < 0)
- result = -1;
- }
- else
- if (__chdir ("..") < 0)
- result = -1;
- }
- }
- }
+ result = ftw_dir (data, &st, dir);
}
else
result = (*data->func) (data->dirbuf, &st, data->cvt_arr[flag],
&data->ftw);
}
+ if ((data->flags & FTW_ACTIONRETVAL) && result == FTW_SKIP_SUBTREE)
+ result = 0;
+
return result;
}
static int
+__attribute ((noinline))
internal_function
-ftw_dir (struct ftw_data *data, struct STAT *st)
+ftw_dir (struct ftw_data *data, struct STAT *st, struct dir_data *old_dir)
{
struct dir_data dir;
struct dirent64 *d;
__set_errno (save_err);
}
+ if ((data->flags & FTW_ACTIONRETVAL) && result == FTW_SKIP_SIBLINGS)
+ result = 0;
+
/* Prepare the return, revert the `struct FTW' information. */
data->dirbuf[data->ftw.base - 1] = '\0';
--data->ftw.level;
if (result == 0 && (data->flags & FTW_DEPTH))
result = (*data->func) (data->dirbuf, st, FTW_DP, &data->ftw);
+ if (old_dir
+ && (data->flags & FTW_CHDIR)
+ && (result == 0
+ || ((data->flags & FTW_ACTIONRETVAL)
+ && (result != -1 && result != FTW_STOP))))
+ {
+ /* Change back to the parent directory. */
+ int done = 0;
+ if (old_dir->stream != NULL)
+ if (__fchdir (dirfd (old_dir->stream)) == 0)
+ done = 1;
+
+ if (!done)
+ {
+ if (data->ftw.base == 1)
+ {
+ if (__chdir ("/") < 0)
+ result = -1;
+ }
+ else
+ if (__chdir ("..") < 0)
+ result = -1;
+ }
+ }
+
return result;
}
static int
+__attribute ((noinline))
internal_function
ftw_startup (const char *dir, int is_nftw, void *func, int descriptors,
int flags)
result = add_object (&data, &st);
if (result == 0)
- result = ftw_dir (&data, &st);
+ result = ftw_dir (&data, &st, NULL);
}
else
{
&data.ftw);
}
}
+
+ if ((flags & FTW_ACTIONRETVAL)
+ && (result == FTW_SKIP_SUBTREE || result == FTW_SKIP_SIBLINGS))
+ result = 0;
}
/* Return to the start directory (if necessary). */
return ftw_startup (path, 0, func, descriptors, 0);
}
+#ifndef _LIBC
int
NFTW_NAME (path, func, descriptors, flags)
const char *path;
{
return ftw_startup (path, 1, func, descriptors, flags);
}
+#else
+
+#include <shlib-compat.h>
+
+int
+NFTW_NEW_NAME (path, func, descriptors, flags)
+ const char *path;
+ NFTW_FUNC_T func;
+ int descriptors;
+ int flags;
+{
+ if (flags
+ & ~(FTW_PHYS | FTW_MOUNT | FTW_CHDIR | FTW_DEPTH | FTW_ACTIONRETVAL))
+ {
+ __set_errno (EINVAL);
+ return -1;
+ }
+ return ftw_startup (path, 1, func, descriptors, flags);
+}
+
+versioned_symbol (libc, NFTW_NEW_NAME, NFTW_NAME, GLIBC_2_3_3);
+
+#if SHLIB_COMPAT(libc, GLIBC_2_1, GLIBC_2_3_3)
+
+/* Older nftw* version just ignored all unknown flags. */
+
+int
+NFTW_OLD_NAME (path, func, descriptors, flags)
+ const char *path;
+ NFTW_FUNC_T func;
+ int descriptors;
+ int flags;
+{
+ flags &= (FTW_PHYS | FTW_MOUNT | FTW_CHDIR | FTW_DEPTH);
+ return ftw_startup (path, 1, func, descriptors, flags);
+}
+
+compat_symbol (libc, NFTW_OLD_NAME, NFTW_NAME, GLIBC_2_1);
+#endif
+#endif
# define FTW_CHDIR FTW_CHDIR
FTW_DEPTH = 8 /* Report files in directory before directory itself.*/
# define FTW_DEPTH FTW_DEPTH
+# ifdef __USE_GNU
+ ,
+ FTW_ACTIONRETVAL = 16 /* Assume callback to return FTW_* values instead of
+ zero to continue and non-zero to terminate. */
+# define FTW_ACTIONRETVAL FTW_ACTIONRETVAL
+# endif
+};
+
+#ifdef __USE_GNU
+/* Return values from callback functions. */
+enum
+{
+ FTW_CONTINUE = 0, /* Continue with next sibling or for FTW_D with the
+ first child. */
+# define FTW_CONTINUE FTW_CONTINUE
+ FTW_STOP = 1, /* Return from `ftw' or `nftw' with FTW_STOP as return
+ value. */
+# define FTW_STOP FTW_STOP
+ FTW_SKIP_SUBTREE = 2, /* Only meaningful for FTW_D: Don't walk through the
+ subtree, instead just continue with its next
+ sibling. */
+# define FTW_SKIP_SUBTREE FTW_SKIP_SUBTREE
+ FTW_SKIP_SIBLINGS = 3,/* Continue with FTW_DP callback for current directory
+ (if FTW_DEPTH) and then its siblings. */
+# define FTW_SKIP_SIBLINGS FTW_SKIP_SIBLINGS
};
+#endif
/* Structure used for fourth argument to callback function for `nftw'. */
struct FTW
#define FTW_NAME ftw64
#define NFTW_NAME nftw64
+#define NFTW_OLD_NAME __old_nftw64
+#define NFTW_NEW_NAME __new_nftw64
#define INO_T ino64_t
#define STAT stat64
#define LXSTAT __lxstat64
EOF
rm $testout
+mkdir $tmpdir/foo/lvl1b
+echo > $tmpdir/foo/lvl1b/file@1b
+echo > $tmpdir/foo/lvl1b/file2@1b
+echo > $tmpdir/foo/lvl1b/file3@1b
+
+LD_LIBRARY_PATH=$objpfx $ldso $testprogram --skip-subtree=lvl1 $tmpdir |
+ sort > $testout
+
+cat <<EOF | diff -u $testout - || exit 1
+base = "/tmp/", file = "ftwtest.d", flag = FTW_D, level = 0
+base = "/tmp/ftwtest.d/", file = "bar", flag = FTW_D, level = 1
+base = "/tmp/ftwtest.d/", file = "baz", flag = FTW_F, level = 1
+base = "/tmp/ftwtest.d/", file = "foo", flag = FTW_D, level = 1
+base = "/tmp/ftwtest.d/bar/", file = "xo", flag = FTW_F, level = 2
+base = "/tmp/ftwtest.d/foo/", file = "lvl1", flag = FTW_D, level = 2
+base = "/tmp/ftwtest.d/foo/", file = "lvl1b", flag = FTW_D, level = 2
+base = "/tmp/ftwtest.d/foo/lvl1b/", file = "file2@1b", flag = FTW_F, level = 3
+base = "/tmp/ftwtest.d/foo/lvl1b/", file = "file3@1b", flag = FTW_F, level = 3
+base = "/tmp/ftwtest.d/foo/lvl1b/", file = "file@1b", flag = FTW_F, level = 3
+EOF
+rm $testout
+
+LD_LIBRARY_PATH=$objpfx $ldso $testprogram --skip-siblings=lvl1 $tmpdir |
+ sort > $testout
+
+# The filesystem is not required to put lvl1 before lvl1b.
+# If lvl1b comes after lvl1, it shouldn't be printed, while if it
+# comes before, it should.
+catcmd=cat
+[ -n "`ls -U $tmpdir/foo/ | sed -n '/lvl1$/,${/lvl1b$/p}'`" ] \
+ && catcmd="grep -v lvl1b"
+
+$catcmd <<EOF | diff -u $testout - || exit 1
+base = "/tmp/", file = "ftwtest.d", flag = FTW_D, level = 0
+base = "/tmp/ftwtest.d/", file = "bar", flag = FTW_D, level = 1
+base = "/tmp/ftwtest.d/", file = "baz", flag = FTW_F, level = 1
+base = "/tmp/ftwtest.d/", file = "foo", flag = FTW_D, level = 1
+base = "/tmp/ftwtest.d/bar/", file = "xo", flag = FTW_F, level = 2
+base = "/tmp/ftwtest.d/foo/", file = "lvl1", flag = FTW_D, level = 2
+base = "/tmp/ftwtest.d/foo/", file = "lvl1b", flag = FTW_D, level = 2
+base = "/tmp/ftwtest.d/foo/lvl1b/", file = "file2@1b", flag = FTW_F, level = 3
+base = "/tmp/ftwtest.d/foo/lvl1b/", file = "file3@1b", flag = FTW_F, level = 3
+base = "/tmp/ftwtest.d/foo/lvl1b/", file = "file@1b", flag = FTW_F, level = 3
+EOF
+rm $testout
+
+LD_LIBRARY_PATH=$objpfx $ldso $testprogram --skip-siblings=file@1b $tmpdir |
+ sort > $testout
+
+# The filesystem is not required to put file2@1b and file3@1b after file@1b.
+# If file[23]@1b come after file@1b, it shouldn't be printed, while if they
+# come before, they should.
+regexp=`echo $(ls -U /tmp/ftwtest.d/foo/lvl1b \
+ | sed -n '/file@1b$/,${/file[23]@1b$/p}') | sed 's, ,|,'`
+catcmd=cat
+[ -n "$regexp" ] && catcmd="egrep -v $regexp"
+
+$catcmd <<EOF | diff -u $testout - || exit 1
+base = "/tmp/", file = "ftwtest.d", flag = FTW_D, level = 0
+base = "/tmp/ftwtest.d/", file = "bar", flag = FTW_D, level = 1
+base = "/tmp/ftwtest.d/", file = "baz", flag = FTW_F, level = 1
+base = "/tmp/ftwtest.d/", file = "foo", flag = FTW_D, level = 1
+base = "/tmp/ftwtest.d/bar/", file = "xo", flag = FTW_F, level = 2
+base = "/tmp/ftwtest.d/foo/", file = "lvl1", flag = FTW_D, level = 2
+base = "/tmp/ftwtest.d/foo/", file = "lvl1b", flag = FTW_D, level = 2
+base = "/tmp/ftwtest.d/foo/lvl1/", file = "file@1", flag = FTW_F, level = 3
+base = "/tmp/ftwtest.d/foo/lvl1/", file = "link@1", flag = FTW_SLN, level = 3
+base = "/tmp/ftwtest.d/foo/lvl1/", file = "lvl2", flag = FTW_D, level = 3
+base = "/tmp/ftwtest.d/foo/lvl1/lvl2/", file = "file@2", flag = FTW_F, level = 4
+base = "/tmp/ftwtest.d/foo/lvl1/lvl2/", file = "lvl3", flag = FTW_D, level = 4
+base = "/tmp/ftwtest.d/foo/lvl1/lvl2/lvl3/", file = "file@3", flag = FTW_F, level = 5
+base = "/tmp/ftwtest.d/foo/lvl1b/", file = "file2@1b", flag = FTW_F, level = 3
+base = "/tmp/ftwtest.d/foo/lvl1b/", file = "file3@1b", flag = FTW_F, level = 3
+base = "/tmp/ftwtest.d/foo/lvl1b/", file = "file@1b", flag = FTW_F, level = 3
+EOF
+rm $testout
+
rm -fr $tmpdir
exit 0
int do_chdir;
int do_phys;
int do_exit;
+char *skip_subtree;
+char *skip_siblings;
struct option options[] =
{
{ "depth", no_argument, &do_depth, 1 },
{ "chdir", no_argument, &do_chdir, 1 },
{ "phys", no_argument, &do_phys, 1 },
+ { "skip-subtree", required_argument, NULL, 't' },
+ { "skip-siblings", required_argument, NULL, 's' },
{ "early-exit", no_argument, &do_exit, 1 },
{ NULL, 0, NULL, 0 }
};
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]);
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
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;
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);
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}.
git://sourceware.org / glibc.git / commitdiff