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Consolidate scandir{at}{64} implementation

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This patch consolidates scandir{at}{64} implementation on just
the default dirent/scandir{at}{64}{_r}.c ones.  It changes the logic
to follow the conventions used on other code consolidation:

  * scandir{at} is only built for _DIRENT_MATCHES_DIRENT64 being 0.

  * scandir{at}{64} is always built and aliased to getdents for ABIs
    that define _DIRENT_MATCHES_DIRENT64 to 1.

Also on Linux the compat symbol for old non-LFS dirent64 definition
requires a platform-specific scandir64.c.

Checked on aarch64-linux-gnu, x86_64-linux-gnu, i686-linux-gnu,
sparcv9-linux-gnu, sparc64-linux-gnu, powerpc-linux-gnu, and
powerpc64le-linux-gnu.

	* dirent/scandir-tail-common.c: New file.
	* dirent/scandir-tail.c: Use scandir-tail-common.c.
	(__scandir_tail): Build iff _DIRENT_MATCHES_DIRENT64 is not defined.
	* dirent/scandir.c: Use scandir-tail-common.c.
	* dirent/scandirat.c: Likewise.
	* dirent/scandir64-tail.c: Use scandir-tail-common.c.
	* dirent/scandir64.c (scandir64): Always build and alias to scandir
	if _DIRENT_MATCHES_DIRENT64 is defined.
	* dirent/scandirat64.c (scandirat64): Likewise.
	* include/dirent.h (__scandir_tail): Only define iff
	_DIRENT_MATCHES_DIRENT64 is not defined.
	(__scandir64_tail): Define regardless.
	(__scandirat, scandirat64): Remove libc_hidden_proto.
	* sysdeps/unix/sysv/linux/arm/scandir64.c: Remove file.
	* sysdeps/unix/sysv/linux/m68k/scandir64.c: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/scandir64.c: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/scandir64.c: Likewise.
	* sysdeps/unix/sysv/linux/i386/scandir64.c: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/scandir64.c: Likewise.
	* sysdeps/unix/sysv/linux/scandir64.c: New file.
This commit is contained in:
Adhemerval Zanella 2018-03-01 09:04:41 -03:00
parent 458b94f63e
commit c0123b3b11
15 changed files with 198 additions and 192 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
ChangeLog
View File

@ -1,3 +1,26 @@
2018-04-20 Adhemerval Zanella <adhemerval.zanella@linaro.org>
* dirent/scandir-tail-common.c: New file.
* dirent/scandir-tail.c: Use scandir-tail-common.c.
(__scandir_tail): Build iff _DIRENT_MATCHES_DIRENT64 is not defined.
* dirent/scandir.c: Use scandir-tail-common.c.
* dirent/scandirat.c: Likewise.
* dirent/scandir64-tail.c: Use scandir-tail-common.c.
* dirent/scandir64.c (scandir64): Always build and alias to scandir
if _DIRENT_MATCHES_DIRENT64 is defined.
* dirent/scandirat64.c (scandirat64): Likewise.
* include/dirent.h (__scandir_tail): Only define iff
_DIRENT_MATCHES_DIRENT64 is not defined.
(__scandir64_tail): Define regardless.
(__scandirat, scandirat64): Remove libc_hidden_proto.
* sysdeps/unix/sysv/linux/arm/scandir64.c: Remove file.
* sysdeps/unix/sysv/linux/m68k/scandir64.c: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/scandir64.c: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/scandir64.c: Likewise.
* sysdeps/unix/sysv/linux/i386/scandir64.c: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc32/scandir64.c: Likewise.
* sysdeps/unix/sysv/linux/scandir64.c: New file.
2018-04-20 Joseph Myers <joseph@codesourcery.com>
* sysdeps/unix/sysv/linux/aarch64/bits/hwcap.h (HWCAP_ASIMDFHM):

103
dirent/scandir-tail-common.c Normal file
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@ -0,0 +1,103 @@
/* Common implementation for scandir{at}.
Copyright (C) 2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <string.h>
#include <errno.h>
int
SCANDIR_TAIL (DIR *dp,
DIRENT_TYPE ***namelist,
int (*select) (const DIRENT_TYPE *),
int (*cmp) (const DIRENT_TYPE **, const DIRENT_TYPE **))
{
if (dp == NULL)
return -1;
int save = errno;
__set_errno (0);
int result;
struct scandir_cancel_struct c = { .dp = dp };
__libc_cleanup_push (&__scandir_cancel_handler, &c);
DIRENT_TYPE **v = NULL;
size_t vsize = 0;
DIRENT_TYPE *d;
while ((d = READDIR (dp)) != NULL)
{
if (select != NULL)
{
int selected = (*select) (d);
/* The SELECT function might have set errno to non-zero on
success. It was zero before and it needs to be again to
make the later tests work. */
__set_errno (0);
if (!selected)
continue;
}
if (__glibc_unlikely (c.cnt == vsize))
{
if (vsize == 0)
vsize = 10;
else
vsize *= 2;
DIRENT_TYPE **new = realloc (v, vsize * sizeof *v);
if (new == NULL)
break;
c.v = v = new;
}
size_t dsize = &d->d_name[_D_ALLOC_NAMLEN (d)] - (char *) d;
DIRENT_TYPE *vnew = malloc (dsize);
if (vnew == NULL)
break;
v[c.cnt++] = (DIRENT_TYPE *) memcpy (vnew, d, dsize);
/* Ignore errors from readdir, malloc or realloc. These functions
might have set errno to non-zero on success. It was zero before
and it needs to be again to make the latter tests work. */
__set_errno (0);
}
if (__glibc_likely (errno == 0))
{
__closedir (dp);
/* Sort the list if we have a comparison function to sort with. */
if (cmp != NULL)
qsort (v, c.cnt, sizeof *v, (__compar_fn_t) cmp);
*namelist = v;
result = c.cnt;
}
else
{
/* This frees everything and calls closedir. */
__scandir_cancel_handler (&c);
result = -1;
}
__libc_cleanup_pop (0);
if (result >= 0)
__set_errno (save);
return result;
}

99
dirent/scandir-tail.c
View File

@ -17,96 +17,13 @@
<http://www.gnu.org/licenses/>. */
#include <dirent.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <libc-lock.h>
#ifndef SCANDIR_TAIL
# define SCANDIR_TAIL __scandir_tail
# define READDIR __readdir
# define DIRENT_TYPE struct dirent
#if !_DIRENT_MATCHES_DIRENT64
# define SCANDIR_TAIL __scandir_tail
# define READDIR __readdir
# define DIRENT_TYPE struct dirent
# include <dirent/scandir-tail-common.c>
#endif
int
SCANDIR_TAIL (DIR *dp,
DIRENT_TYPE ***namelist,
int (*select) (const DIRENT_TYPE *),
int (*cmp) (const DIRENT_TYPE **, const DIRENT_TYPE **))
{
if (dp == NULL)
return -1;
int save = errno;
__set_errno (0);
int result;
struct scandir_cancel_struct c = { .dp = dp };
__libc_cleanup_push (&__scandir_cancel_handler, &c);
DIRENT_TYPE **v = NULL;
size_t vsize = 0;
DIRENT_TYPE *d;
while ((d = READDIR (dp)) != NULL)
{
if (select != NULL)
{
int selected = (*select) (d);
/* The SELECT function might have set errno to non-zero on
success. It was zero before and it needs to be again to
make the later tests work. */
__set_errno (0);
if (!selected)
continue;
}
if (__glibc_unlikely (c.cnt == vsize))
{
if (vsize == 0)
vsize = 10;
else
vsize *= 2;
DIRENT_TYPE **new = realloc (v, vsize * sizeof *v);
if (new == NULL)
break;
c.v = v = new;
}
size_t dsize = &d->d_name[_D_ALLOC_NAMLEN (d)] - (char *) d;
DIRENT_TYPE *vnew = malloc (dsize);
if (vnew == NULL)
break;
v[c.cnt++] = (DIRENT_TYPE *) memcpy (vnew, d, dsize);
/* Ignore errors from readdir, malloc or realloc. These functions
might have set errno to non-zero on success. It was zero before
and it needs to be again to make the latter tests work. */
__set_errno (0);
}
if (__glibc_likely (errno == 0))
{
__closedir (dp);
/* Sort the list if we have a comparison function to sort with. */
if (cmp != NULL)
qsort (v, c.cnt, sizeof *v, (__compar_fn_t) cmp);
*namelist = v;
result = c.cnt;
}
else
{
/* This frees everything and calls closedir. */
__scandir_cancel_handler (&c);
result = -1;
}
__libc_cleanup_pop (0);
if (result >= 0)
__set_errno (save);
return result;
}

27
dirent/scandir.c
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@ -15,31 +15,14 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
/* We need to avoid the header declaration of scandir64, because
the types don't match scandir and then the compiler will
complain about the mismatch when we do the alias below. */
#define scandir64 __renamed_scandir64
#include <dirent.h>
#undef scandir64
#ifndef SCANDIR
# define SCANDIR scandir
# define SCANDIR_TAIL __scandir_tail
# define DIRENT_TYPE struct dirent
#endif
#if !_DIRENT_MATCHES_DIRENT64
int
SCANDIR (const char *dir,
DIRENT_TYPE ***namelist,
int (*select) (const DIRENT_TYPE *),
int (*cmp) (const DIRENT_TYPE **, const DIRENT_TYPE **))
scandir (const char *dir, struct dirent ***namelist,
int (*select) (const struct dirent *),
int (*cmp) (const struct dirent **, const struct dirent **))
{
return SCANDIR_TAIL (__opendir (dir), namelist, select, cmp);
return __scandir_tail (__opendir (dir), namelist, select, cmp);
}
#if _DIRENT_MATCHES_DIRENT64
weak_alias (scandir, scandir64)
#endif

10
dirent/scandir64-tail.c
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@ -18,9 +18,7 @@
#include <dirent.h>
#if !_DIRENT_MATCHES_DIRENT64
# define SCANDIR_TAIL __scandir64_tail
# define READDIR __readdir64
# define DIRENT_TYPE struct dirent64
# include <scandir-tail.c>
#endif
#define SCANDIR_TAIL __scandir64_tail
#define READDIR __readdir64
#define DIRENT_TYPE struct dirent64
#include <scandir-tail-common.c>

19
dirent/scandir64.c
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@ -15,15 +15,18 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#define scandir __no_scandir_decl
#include <dirent.h>
#undef scandir
/* scandir.c defines scandir64 as an alias if _DIRENT_MATCHES_DIRENT64. */
#if !_DIRENT_MATCHES_DIRENT64
# define SCANDIR scandir64
# define SCANDIR_TAIL __scandir64_tail
# define DIRENT_TYPE struct dirent64
# include <dirent/scandir.c>
int
scandir64 (const char *dir, struct dirent64 ***namelist,
int (*select) (const struct dirent64 *),
int (*cmp) (const struct dirent64 **, const struct dirent64 **))
{
return __scandir64_tail (__opendir (dir), namelist, select, cmp);
}
#if _DIRENT_MATCHES_DIRENT64
weak_alias (scandir64, scandir)
#endif

30
dirent/scandirat.c
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@ -15,35 +15,15 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
/* We need to avoid the header declaration of scandir64, because
the types don't match scandir and then the compiler will
complain about the mismatch when we do the alias below. */
#define scandirat64 __renamed_scandirat64
#include <dirent.h>
#undef scandirat64
#ifndef SCANDIRAT
# define SCANDIRAT __scandirat
# define SCANDIR_TAIL __scandir_tail
# define DIRENT_TYPE struct dirent
# define SCANDIRAT_WEAK_ALIAS
#endif
#if !_DIRENT_MATCHES_DIRENT64
int
SCANDIRAT (int dfd, const char *dir,
DIRENT_TYPE ***namelist,
int (*select) (const DIRENT_TYPE *),
int (*cmp) (const DIRENT_TYPE **, const DIRENT_TYPE **))
__scandirat (int dfd, const char *dir, struct dirent ***namelist,
int (*select) (const struct dirent *),
int (*cmp) (const struct dirent **, const struct dirent **))
{
return SCANDIR_TAIL (__opendirat (dfd, dir), namelist, select, cmp);
return __scandir_tail (__opendirat (dfd, dir), namelist, select, cmp);
}
libc_hidden_def (SCANDIRAT)
#ifdef SCANDIRAT_WEAK_ALIAS
weak_alias (__scandirat, scandirat)
#endif
#if _DIRENT_MATCHES_DIRENT64
weak_alias (scandirat, scandirat64)
#endif

19
dirent/scandirat64.c
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@ -15,15 +15,18 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#define scandirat __no_scandirat_decl
#include <dirent.h>
#undef scandirat
/* scandirat.c defines scandirat64 as an alias if _DIRENT_MATCHES_DIRENT64. */
#if !_DIRENT_MATCHES_DIRENT64
# define SCANDIRAT scandirat64
# define SCANDIR_TAIL __scandir64_tail
# define DIRENT_TYPE struct dirent64
# include <scandirat.c>
int
scandirat64 (int dfd, const char *dir, struct dirent64 ***namelist,
int (*select) (const struct dirent64 *),
int (*cmp) (const struct dirent64 **, const struct dirent64 **))
{
return __scandir64_tail (__opendirat (dfd, dir), namelist, select, cmp);
}
#if _DIRENT_MATCHES_DIRENT64
weak_alias (scandirat64, scandirat)
#endif

18
include/dirent.h
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@ -58,25 +58,23 @@ extern int __scandir_tail (DIR *dp,
int (*cmp) (const struct dirent **,
const struct dirent **))
attribute_hidden;
# if _DIRENT_MATCHES_DIRENT64
# define __scandir64_tail (dp, namelist, select, cmp) \
__scandir_tail (dp, (struct dirent ***) (namelist), \
(int (*) (const struct dirent *)) (select), \
(int (*) (const struct dirent **, \
const struct dirent **)) (cmp))
# else
# if !_DIRENT_MATCHES_DIRENT64
extern int __scandir_tail (DIR *dp,
struct dirent ***namelist,
int (*select) (const struct dirent *),
int (*cmp) (const struct dirent **,
const struct dirent **))
attribute_hidden;
# endif
extern int __scandir64_tail (DIR *dp,
struct dirent64 ***namelist,
int (*select) (const struct dirent64 *),
int (*cmp) (const struct dirent64 **,
const struct dirent64 **))
attribute_hidden;
# endif
libc_hidden_proto (__rewinddir)
extern __typeof (scandirat) __scandirat;
libc_hidden_proto (__scandirat)
libc_hidden_proto (scandirat64)
# if IS_IN (rtld) && !defined NO_RTLD_HIDDEN
extern __typeof (__rewinddir) __rewinddir attribute_hidden;

1
sysdeps/unix/sysv/linux/arm/scandir64.c
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@ -1 +0,0 @@
#include <sysdeps/unix/sysv/linux/i386/scandir64.c>

1
sysdeps/unix/sysv/linux/m68k/scandir64.c
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@ -1 +0,0 @@
#include <sysdeps/unix/sysv/linux/i386/scandir64.c>

1
sysdeps/unix/sysv/linux/powerpc/powerpc32/scandir64.c
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@ -1 +0,0 @@
#include <sysdeps/unix/sysv/linux/i386/scandir64.c>

1
sysdeps/unix/sysv/linux/s390/s390-32/scandir64.c
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@ -1 +0,0 @@
#include <sysdeps/unix/sysv/linux/i386/scandir64.c>

37
sysdeps/unix/sysv/linux/i386/scandir64.c → sysdeps/unix/sysv/linux/scandir64.c
View File

@ -15,26 +15,28 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#define scandir __no_scandir_decl
#include <dirent.h>
#undef scandir
#define SCANDIR __scandir64
#define SCANDIR_TAIL __scandir64_tail
#define DIRENT_TYPE struct dirent64
#include <dirent/scandir.c>
#undef SCANDIR
#undef SCANDIR_TAIL
#undef DIRENT_TYPE
#include <shlib-compat.h>
int
__scandir64 (const char *dir, struct dirent64 ***namelist,
int (*select) (const struct dirent64 *),
int (*cmp) (const struct dirent64 **, const struct dirent64 **))
{
return __scandir64_tail (__opendir (dir), namelist, select, cmp);
}
#if _DIRENT_MATCHES_DIRENT64
weak_alias (__scandir64, scandir64)
weak_alias (__scandir64, scandir)
#else
# include <shlib-compat.h>
versioned_symbol (libc, __scandir64, scandir64, GLIBC_2_2);
#if SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_2)
# include <string.h>
# include <errno.h>
# include "olddirent.h"
# if SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_2)
# include <string.h>
# include <errno.h>
# include "olddirent.h"
int
__old_scandir64 (const char *dir, struct __old_dirent64 ***namelist,
@ -133,4 +135,5 @@ __old_scandir64 (const char *dir, struct __old_dirent64 ***namelist,
}
compat_symbol (libc, __old_scandir64, scandir64, GLIBC_2_1);
#endif
# endif /* SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_2) */
#endif /* _DIRENT_MATCHES_DIRENT64 */

1
sysdeps/unix/sysv/linux/sparc/sparc32/scandir64.c
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@ -1 +0,0 @@
#include <sysdeps/unix/sysv/linux/i386/scandir64.c>