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2004-03-01  Ulrich Drepper  <drepper@redhat.com>

	* sysdeps/unix/sysv/linux/kernel-features.h: Add support for
	__ASSUME_GETDENTS32_D_TYPE.
	* sysdeps/unix/sysv/linux/getdents.c: For 2.6.4+ kernels you
	getdents syscall again since it provides d_type information.

	* manual/install.texi (Tools for Compilation): Autoconf 2.53 is
	required.
This commit is contained in:
Ulrich Drepper 2004-03-01 21:34:36 +00:00
parent cff08c8110
commit afedc4afee
3 changed files with 58 additions and 12 deletions
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11
ChangeLog
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@ -1,8 +1,15 @@
2004-03-01 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/kernel-features.h: Add support for
__ASSUME_GETDENTS32_D_TYPE.
* sysdeps/unix/sysv/linux/getdents.c: For 2.6.4+ kernels you
getdents syscall again since it provides d_type information.
2004-02-29 Andreas Jaeger <aj@suse.de>
* manual/install.texi (Tools for Compilation): Autoconf 2.53 is required.
* manual/install.texi (Tools for Compilation): Autoconf 2.53 is
required.
(Supported Configurations): Add x86_64-*-linux.
* INSTALL: Regenerated.
2004-02-28 Ulrich Drepper <drepper@redhat.com>

49
sysdeps/unix/sysv/linux/getdents.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 1993, 1995-2002, 2003 Free Software Foundation, Inc.
/* Copyright (C) 1993, 1995-2003, 2004 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
@ -36,14 +36,18 @@
#include "kernel-features.h"
#ifdef __NR_getdents64
#ifndef __ASSUME_GETDENTS64_SYSCALL
#ifndef __GETDENTS
# ifndef __ASSUME_GETDENTS64_SYSCALL
# ifndef __GETDENTS
/* The variable is shared between all *getdents* calls. */
int __have_no_getdents64;
#else
# else
extern int __have_no_getdents64;
# endif
# define have_no_getdents64_defined 1
# endif
#endif
#endif
#ifndef have_no_getdents64_defined
# define __have_no_getdents64 0
#endif
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
@ -94,13 +98,42 @@ ssize_t
internal_function
__GETDENTS (int fd, char *buf, size_t nbytes)
{
off64_t last_offset = -1;
ssize_t retval;
#ifdef __ASSUME_GETDENTS32_D_TYPE
if (sizeof (DIRENT_TYPE) == sizeof (struct dirent))
{
retval = INLINE_SYSCALL (getdents, 3, fd, CHECK_N(buf, nbytes), nbytes);
/* The kernel added the d_type value after the name. Change
this now. */
if (retval != -1)
{
union
{
struct kernel_dirent k;
struct dirent u;
} *kbuf = (void *) buf;
while ((char *) kbuf < buf + retval)
{
char d_type = *((char *) kbuf + kbuf->k.d_reclen - 1);
memmove (kbuf->u.d_name, kbuf->k.d_name,
strlen (kbuf->k.d_name) + 1);
kbuf->u.d_type = d_type;
kbuf = (void *) ((char *) kbuf + kbuf->k.d_reclen);
}
}
return retval;
}
#endif
off64_t last_offset = -1;
#ifdef __NR_getdents64
# ifndef __ASSUME_GETDENTS64_SYSCALL
if (!__have_no_getdents64)
# endif
{
# ifndef __ASSUME_GETDENTS64_SYSCALL
int saved_errno = errno;

10
sysdeps/unix/sysv/linux/kernel-features.h
View File

@ -384,11 +384,17 @@
SIMD (AKA Altivec, VMX) instructions and register state. This changes
the overall size of the sigcontext and adds the swapcontext syscall. */
#if __LINUX_KERNEL_VERSION >= 132608 && defined __powerpc__
# define __ASSUME_SWAPCONTEXT_SYSCALL 1
# define __ASSUME_SWAPCONTEXT_SYSCALL 1
#endif
/* The CLONE_DETACHED flag is not necessary in 2.6.2 kernels, it is
implied. */
#if __LINUX_KERNEL_VERSION >= 132610
# define __ASSUME_NO_CLONE_DETACHED 1
# define __ASSUME_NO_CLONE_DETACHED 1
#endif
/* Starting with version 2.6.4-rc1 the getdents syscall returns d_type
information as well. */
#if __LINUX_KERNEL_VERSION >= 132612
# define __ASSUME_GETDENTS32_D_TYPE 1
#endif