FTW Port from musl

Message ID 20200912211939.31559-1-eshandhawan51@gmail.com
State Superseded
Headers show
Series
  • FTW Port from musl
Related show

Commit Message

R. Diez via Newlib Sept. 12, 2020, 9:19 p.m.
Signed-off-by: Eshan dhawan <eshandhawan51@gmail.com>

---
 newlib/libc/include/ftw.h     |  64 ++++++++++++++
 newlib/libc/posix/Makefile.am |   2 +-
 newlib/libc/posix/ftw.c       |  34 ++++++++
 newlib/libc/posix/nftw.c      | 156 ++++++++++++++++++++++++++++++++++
 4 files changed, 255 insertions(+), 1 deletion(-)
 create mode 100644 newlib/libc/include/ftw.h
 create mode 100644 newlib/libc/posix/ftw.c
 create mode 100644 newlib/libc/posix/nftw.c

-- 
2.17.1

Comments

R. Diez via Newlib Sept. 18, 2020, 9:59 p.m. | #1
Hi Eshan,

There is an issue.  This code is in the shared part of newlib but
weak_alias is not defined in shared headers.

You could spell out the weak_alias using __attribute__ as you can see in
libc/sys/linux/linuxthreads/libc-symbols.h:

#  define _weak_alias(name, aliasname) \
  extern __typeof (name) aliasname __attribute__ ((__weak__, __alias__
(#name)));

or you could define a similar macro and reuse it.

-- Jeff J.

On Sat, Sep 12, 2020 at 5:20 PM Eshan dhawan via Newlib <
newlib@sourceware.org> wrote:

> Signed-off-by: Eshan dhawan <eshandhawan51@gmail.com>

> ---

>  newlib/libc/include/ftw.h     |  64 ++++++++++++++

>  newlib/libc/posix/Makefile.am |   2 +-

>  newlib/libc/posix/ftw.c       |  34 ++++++++

>  newlib/libc/posix/nftw.c      | 156 ++++++++++++++++++++++++++++++++++

>  4 files changed, 255 insertions(+), 1 deletion(-)

>  create mode 100644 newlib/libc/include/ftw.h

>  create mode 100644 newlib/libc/posix/ftw.c

>  create mode 100644 newlib/libc/posix/nftw.c

>

> diff --git a/newlib/libc/include/ftw.h b/newlib/libc/include/ftw.h

> new file mode 100644

> index 000000000..f88ce87b2

> --- /dev/null

> +++ b/newlib/libc/include/ftw.h

> @@ -0,0 +1,64 @@

> +/*

> +* Copyright © 2005-2020 Rich Felker, et al.

> +*

> +* Permission is hereby granted, free of charge, to any person obtaining

> +* a copy of this software and associated documentation files (the

> +* "Software"), to deal in the Software without restriction, including

> +* without limitation the rights to use, copy, modify, merge, publish,

> +* distribute, sublicense, and/or sell copies of the Software, and to

> +* permit persons to whom the Software is furnished to do so, subject to

> +* the following conditions:

> +*

> +* The above copyright notice and this permission notice shall be

> +* included in all copies or substantial portions of the Software.

> +*

> +* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

> +* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

> +* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

> +* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY

> +* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,

> +* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

> +* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

> +*/

> +

> +#ifndef _FTW_H

> +#define        _FTW_H

> +

> +#ifdef __cplusplus

> +extern "C" {

> +#endif

> +

> +#include <sys/features.h>

> +#include <sys/stat.h>

> +

> +#define FTW_F   1

> +#define FTW_D   2

> +#define FTW_DNR 3

> +#define FTW_NS  4

> +#define FTW_SL  5

> +#define FTW_DP  6

> +#define FTW_SLN 7

> +

> +#define FTW_PHYS  1

> +#define FTW_MOUNT 2

> +#define FTW_CHDIR 4

> +#define FTW_DEPTH 8

> +

> +struct FTW {

> +       int base;

> +       int level;

> +};

> +

> +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);

> +

> +#if defined(_LARGEFILE64_SOURCE) || defined(_GNU_SOURCE)

> +#define ftw64 ftw

> +#define nftw64 nftw

> +#endif

> +

> +#ifdef __cplusplus

> +}

> +#endif

> +

> +#endif

> diff --git a/newlib/libc/posix/Makefile.am b/newlib/libc/posix/Makefile.am

> index 6cdee1df0..5a358f782 100644

> --- a/newlib/libc/posix/Makefile.am

> +++ b/newlib/libc/posix/Makefile.am

> @@ -10,7 +10,7 @@ GENERAL_SOURCES = \

>         opendir.c readdir.c readdir_r.c \

>         regcomp.c regerror.c regexec.c regfree.c \

>         rewinddir.c sleep.c usleep.c \

> -       telldir.c

> +       telldir.c ftw.c nftw.c

>

>  ELIX_2_SOURCES = \

>          scandir.c seekdir.c

> diff --git a/newlib/libc/posix/ftw.c b/newlib/libc/posix/ftw.c

> new file mode 100644

> index 000000000..fa320e9b0

> --- /dev/null

> +++ b/newlib/libc/posix/ftw.c

> @@ -0,0 +1,34 @@

> +/*

> +* Copyright © 2005-2020 Rich Felker, et al.

> +*

> +* Permission is hereby granted, free of charge, to any person obtaining

> +* a copy of this software and associated documentation files (the

> +* "Software"), to deal in the Software without restriction, including

> +* without limitation the rights to use, copy, modify, merge, publish,

> +* distribute, sublicense, and/or sell copies of the Software, and to

> +* permit persons to whom the Software is furnished to do so, subject to

> +* the following conditions:

> +*

> +* The above copyright notice and this permission notice shall be

> +* included in all copies or substantial portions of the Software.

> +*

> +* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

> +* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

> +* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

> +* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY

> +* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,

> +* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

> +* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

> +*/

> +

> +#include <ftw.h>

> +

> +int ftw(const char *path, int (*fn)(const char *, const struct stat *,

> int), int fd_limit)

> +{

> +       /* The following cast assumes that calling a function with one

> +        * argument more than it needs behaves as expected. This is

> +        * actually undefined, but works on all real-world machines. */

> +       return nftw(path, (int (*)())fn, fd_limit, FTW_PHYS);

> +}

> +

> +weak_alias(ftw, ftw64);

> diff --git a/newlib/libc/posix/nftw.c b/newlib/libc/posix/nftw.c

> new file mode 100644

> index 000000000..0ffca9f67

> --- /dev/null

> +++ b/newlib/libc/posix/nftw.c

> @@ -0,0 +1,156 @@

> +/*

> +* Copyright © 2005-2020 Rich Felker, et al.

> +*

> +* Permission is hereby granted, free of charge, to any person obtaining

> +* a copy of this software and associated documentation files (the

> +* "Software"), to deal in the Software without restriction, including

> +* without limitation the rights to use, copy, modify, merge, publish,

> +* distribute, sublicense, and/or sell copies of the Software, and to

> +* permit persons to whom the Software is furnished to do so, subject to

> +* the following conditions:

> +*

> +* The above copyright notice and this permission notice shall be

> +* included in all copies or substantial portions of the Software.

> +*

> +* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

> +* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

> +* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

> +* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY

> +* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,

> +* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

> +* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

> +*/

> +

> +#include <ftw.h>

> +#include <dirent.h>

> +#include <sys/stat.h>

> +#include <errno.h>

> +#include <unistd.h>

> +#include <string.h>

> +#include <limits.h>

> +#include <pthread.h>

> +

> +struct history

> +{

> +       struct history *chain;

> +       dev_t dev;

> +       ino_t ino;

> +       int level;

> +       int base;

> +};

> +

> +#undef dirfd

> +#define dirfd(d) (*(int *)d)

> +

> +static int do_nftw(char *path, int (*fn)(const char *, const struct stat

> *, int, struct FTW *), int fd_limit, int flags, struct history *h)

> +{

> +       size_t l = strlen(path), j = l && path[l-1]=='/' ? l-1 : l;

> +       struct stat st;

> +       struct history new;

> +       int type;

> +       int r;

> +       struct FTW lev;

> +

> +       if ((flags & FTW_PHYS) ? lstat(path, &st) : stat(path, &st) < 0) {

> +               if (!(flags & FTW_PHYS) && errno==ENOENT && !lstat(path,

> &st))

> +                       type = FTW_SLN;

> +               else if (errno != EACCES) return -1;

> +               else type = FTW_NS;

> +       } else if (S_ISDIR(st.st_mode)) {

> +               if (access(path, R_OK) < 0) type = FTW_DNR;

> +               else if (flags & FTW_DEPTH) type = FTW_DP;

> +               else type = FTW_D;

> +       } else if (S_ISLNK(st.st_mode)) {

> +               if (flags & FTW_PHYS) type = FTW_SL;

> +               else type = FTW_SLN;

> +       } else {

> +               type = FTW_F;

> +       }

> +

> +       if ((flags & FTW_MOUNT) && h && st.st_dev != h->dev)

> +               return 0;

> +

> +       new.chain = h;

> +       new.dev = st.st_dev;

> +       new.ino = st.st_ino;

> +       new.level = h ? h->level+1 : 0;

> +       new.base = j+1;

> +

> +       lev.level = new.level;

> +       if (h) {

> +               lev.base = h->base;

> +       } else {

> +               size_t k;

> +               for (k=j; k && path[k]=='/'; k--);

> +               for (; k && path[k-1]!='/'; k--);

> +               lev.base = k;

> +       }

> +

> +       if (!(flags & FTW_DEPTH) && (r=fn(path, &st, type, &lev)))

> +               return r;

> +

> +       for (; h; h = h->chain)

> +               if (h->dev == st.st_dev && h->ino == st.st_ino)

> +                       return 0;

> +

> +       if ((type == FTW_D || type == FTW_DP) && fd_limit) {

> +               DIR *d = opendir(path);

> +               if (d) {

> +                       struct dirent *de;

> +                       while ((de = readdir(d))) {

> +                               if (de->d_name[0] == '.'

> +                                && (!de->d_name[1]

> +                                 || (de->d_name[1]=='.'

> +                                  && !de->d_name[2]))) continue;

> +                               if (strlen(de->d_name) >= PATH_MAX-l) {

> +                                       errno = ENAMETOOLONG;

> +                                       closedir(d);

> +                                       return -1;

> +                               }

> +                               path[j]='/';

> +                               strcpy(path+j+1, de->d_name);

> +                               if ((r=do_nftw(path, fn, fd_limit-1,

> flags, &new))) {

> +                                       closedir(d);

> +                                       return r;

> +                               }

> +                       }

> +                       closedir(d);

> +               } else if (errno != EACCES) {

> +                       return -1;

> +               }

> +       }

> +

> +       path[l] = 0;

> +       if ((flags & FTW_DEPTH) && (r=fn(path, &st, type, &lev)))

> +               return r;

> +

> +       return 0;

> +}

> +

> +int nftw(const char *path, int (*fn)(const char *, const struct stat *,

> int, struct FTW *), int fd_limit, int flags)

> +{

> +       int r, cs;

> +       size_t l;

> +       char pathbuf[PATH_MAX+1];

> +

> +       if (fd_limit <= 0) return 0;

> +

> +       l = strlen(path);

> +       if (l > PATH_MAX) {

> +               errno = ENAMETOOLONG;

> +               return -1;

> +       }

> +       memcpy(pathbuf, path, l+1);

> +

> +#ifdef _STDIO_WITH_THREAD_CANCELLATION_SUPPORT

> +       pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);

> +#endif

> +       r = do_nftw(pathbuf, fn, fd_limit, flags, NULL);

> +#ifdef _STDIO_WITH_THREAD_CANCELLATION_SUPPORT

> +       pthread_setcancelstate(cs, 0);

> +#endif

> +       return r;

> +}

> +

> +weak_alias(nftw, nftw64);

> +

> --

> 2.17.1

>

>

Patch

diff --git a/newlib/libc/include/ftw.h b/newlib/libc/include/ftw.h
new file mode 100644
index 000000000..f88ce87b2
--- /dev/null
+++ b/newlib/libc/include/ftw.h
@@ -0,0 +1,64 @@ 
+/*
+* Copyright © 2005-2020 Rich Felker, et al.
+*
+* Permission is hereby granted, free of charge, to any person obtaining
+* a copy of this software and associated documentation files (the
+* "Software"), to deal in the Software without restriction, including
+* without limitation the rights to use, copy, modify, merge, publish,
+* distribute, sublicense, and/or sell copies of the Software, and to
+* permit persons to whom the Software is furnished to do so, subject to
+* the following conditions:
+*
+* The above copyright notice and this permission notice shall be
+* included in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#ifndef _FTW_H
+#define	_FTW_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <sys/features.h>
+#include <sys/stat.h>
+
+#define FTW_F   1
+#define FTW_D   2
+#define FTW_DNR 3
+#define FTW_NS  4
+#define FTW_SL  5
+#define FTW_DP  6
+#define FTW_SLN 7
+
+#define FTW_PHYS  1
+#define FTW_MOUNT 2
+#define FTW_CHDIR 4
+#define FTW_DEPTH 8
+
+struct FTW {
+	int base;
+	int level;
+};
+
+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);
+
+#if defined(_LARGEFILE64_SOURCE) || defined(_GNU_SOURCE)
+#define ftw64 ftw
+#define nftw64 nftw
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/newlib/libc/posix/Makefile.am b/newlib/libc/posix/Makefile.am
index 6cdee1df0..5a358f782 100644
--- a/newlib/libc/posix/Makefile.am
+++ b/newlib/libc/posix/Makefile.am
@@ -10,7 +10,7 @@  GENERAL_SOURCES = \
 	opendir.c readdir.c readdir_r.c \
 	regcomp.c regerror.c regexec.c regfree.c \
 	rewinddir.c sleep.c usleep.c \
-	telldir.c
+	telldir.c ftw.c nftw.c
 
 ELIX_2_SOURCES = \
         scandir.c seekdir.c
diff --git a/newlib/libc/posix/ftw.c b/newlib/libc/posix/ftw.c
new file mode 100644
index 000000000..fa320e9b0
--- /dev/null
+++ b/newlib/libc/posix/ftw.c
@@ -0,0 +1,34 @@ 
+/*
+* Copyright © 2005-2020 Rich Felker, et al.
+*
+* Permission is hereby granted, free of charge, to any person obtaining
+* a copy of this software and associated documentation files (the
+* "Software"), to deal in the Software without restriction, including
+* without limitation the rights to use, copy, modify, merge, publish,
+* distribute, sublicense, and/or sell copies of the Software, and to
+* permit persons to whom the Software is furnished to do so, subject to
+* the following conditions:
+*
+* The above copyright notice and this permission notice shall be
+* included in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#include <ftw.h>
+
+int ftw(const char *path, int (*fn)(const char *, const struct stat *, int), int fd_limit)
+{
+	/* The following cast assumes that calling a function with one
+	 * argument more than it needs behaves as expected. This is
+	 * actually undefined, but works on all real-world machines. */
+	return nftw(path, (int (*)())fn, fd_limit, FTW_PHYS);
+}
+
+weak_alias(ftw, ftw64);
diff --git a/newlib/libc/posix/nftw.c b/newlib/libc/posix/nftw.c
new file mode 100644
index 000000000..0ffca9f67
--- /dev/null
+++ b/newlib/libc/posix/nftw.c
@@ -0,0 +1,156 @@ 
+/*
+* Copyright © 2005-2020 Rich Felker, et al.
+*
+* Permission is hereby granted, free of charge, to any person obtaining
+* a copy of this software and associated documentation files (the
+* "Software"), to deal in the Software without restriction, including
+* without limitation the rights to use, copy, modify, merge, publish,
+* distribute, sublicense, and/or sell copies of the Software, and to
+* permit persons to whom the Software is furnished to do so, subject to
+* the following conditions:
+*
+* The above copyright notice and this permission notice shall be
+* included in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#include <ftw.h>
+#include <dirent.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <unistd.h>
+#include <string.h>
+#include <limits.h>
+#include <pthread.h>
+
+struct history
+{
+	struct history *chain;
+	dev_t dev;
+	ino_t ino;
+	int level;
+	int base;
+};
+
+#undef dirfd
+#define dirfd(d) (*(int *)d)
+
+static int do_nftw(char *path, int (*fn)(const char *, const struct stat *, int, struct FTW *), int fd_limit, int flags, struct history *h)
+{
+	size_t l = strlen(path), j = l && path[l-1]=='/' ? l-1 : l;
+	struct stat st;
+	struct history new;
+	int type;
+	int r;
+	struct FTW lev;
+
+	if ((flags & FTW_PHYS) ? lstat(path, &st) : stat(path, &st) < 0) {
+		if (!(flags & FTW_PHYS) && errno==ENOENT && !lstat(path, &st))
+			type = FTW_SLN;
+		else if (errno != EACCES) return -1;
+		else type = FTW_NS;
+	} else if (S_ISDIR(st.st_mode)) {
+		if (access(path, R_OK) < 0) type = FTW_DNR;
+		else if (flags & FTW_DEPTH) type = FTW_DP;
+		else type = FTW_D;
+	} else if (S_ISLNK(st.st_mode)) {
+		if (flags & FTW_PHYS) type = FTW_SL;
+		else type = FTW_SLN;
+	} else {
+		type = FTW_F;
+	}
+
+	if ((flags & FTW_MOUNT) && h && st.st_dev != h->dev)
+		return 0;
+
+	new.chain = h;
+	new.dev = st.st_dev;
+	new.ino = st.st_ino;
+	new.level = h ? h->level+1 : 0;
+	new.base = j+1;
+
+	lev.level = new.level;
+	if (h) {
+		lev.base = h->base;
+	} else {
+		size_t k;
+		for (k=j; k && path[k]=='/'; k--);
+		for (; k && path[k-1]!='/'; k--);
+		lev.base = k;
+	}
+
+	if (!(flags & FTW_DEPTH) && (r=fn(path, &st, type, &lev)))
+		return r;
+
+	for (; h; h = h->chain)
+		if (h->dev == st.st_dev && h->ino == st.st_ino)
+			return 0;
+
+	if ((type == FTW_D || type == FTW_DP) && fd_limit) {
+		DIR *d = opendir(path);
+		if (d) {
+			struct dirent *de;
+			while ((de = readdir(d))) {
+				if (de->d_name[0] == '.'
+				 && (!de->d_name[1]
+				  || (de->d_name[1]=='.'
+				   && !de->d_name[2]))) continue;
+				if (strlen(de->d_name) >= PATH_MAX-l) {
+					errno = ENAMETOOLONG;
+					closedir(d);
+					return -1;
+				}
+				path[j]='/';
+				strcpy(path+j+1, de->d_name);
+				if ((r=do_nftw(path, fn, fd_limit-1, flags, &new))) {
+					closedir(d);
+					return r;
+				}
+			}
+			closedir(d);
+		} else if (errno != EACCES) {
+			return -1;
+		}
+	}
+
+	path[l] = 0;
+	if ((flags & FTW_DEPTH) && (r=fn(path, &st, type, &lev)))
+		return r;
+
+	return 0;
+}
+
+int nftw(const char *path, int (*fn)(const char *, const struct stat *, int, struct FTW *), int fd_limit, int flags)
+{
+	int r, cs;
+	size_t l;
+	char pathbuf[PATH_MAX+1];
+
+	if (fd_limit <= 0) return 0;
+
+	l = strlen(path);
+	if (l > PATH_MAX) {
+		errno = ENAMETOOLONG;
+		return -1;
+	}
+	memcpy(pathbuf, path, l+1);
+
+#ifdef _STDIO_WITH_THREAD_CANCELLATION_SUPPORT
+	pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
+#endif
+	r = do_nftw(pathbuf, fn, fd_limit, flags, NULL);
+#ifdef _STDIO_WITH_THREAD_CANCELLATION_SUPPORT
+	pthread_setcancelstate(cs, 0);
+#endif
+	return r;
+}
+
+weak_alias(nftw, nftw64);
+