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[BZ #5786]

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* elf/dl-sysdep.c: Undefine ROUND after use.
	* sysdeps/generic/ldsodefs.h [HAVE_DL_DISCOVER_OSVERSION]
	(struct rtld_global_ro): Add _dl_tls_get_addr_soft element.
	* elf/rtld.c (rtld_global_ro): Initialize _dl_discover_osversion.
	* sysdeps/unix/sysv/linux/dl-osinfo.h: Move _dl_discover_osversion
	to ...
	* sysdeps/unix/sysv/linux/dl-sysdep.c: ...here.
	* sysdeps/unix/sysv/linux/dl-sysdep.h: Declare _dl_discover_osversion
	if necessary.
	* sysdeps/unix/sysv/linux/sysconf.c: Handle _SC_ARG_MAX here.
This commit is contained in:
Ulrich Drepper
2008-03-08 07:35:10 +00:00
parent 93025f9373
commit 7c22c7ec9a
9 changed files with 148 additions and 102 deletions
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20
sysdeps/unix/sysv/linux/sysconf.c
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@ -1,5 +1,5 @@
/* Get file-specific information about a file. Linux version.
Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc.
Copyright (C) 2003, 2004, 2006, 2008 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
@ -23,7 +23,9 @@
#include <sysdep.h>
#include <time.h>
#include <unistd.h>
#include <sys/resource.h>
#include <not-cancel.h>
#include <ldsodefs.h>
static long int posix_sysconf (int name);
@ -70,6 +72,22 @@ __sysconf (int name)
}
#endif
case _SC_ARG_MAX:
#if __LINUX_KERNEL_VERSION < 0x020617
/* Determine whether this is a kernel 2.6.23 or later. Only
then do we have an argument limit determined by the stack
size. */
if (GLRO(dl_discover_osversion) () >= 0x020617)
#endif
{
/* Use getrlimit to get the stack limit. */
struct rlimit rlimit;
if (__getrlimit (RLIMIT_STACK, &rlimit) == 0)
return MAX (ARG_MAX, rlimit.rlim_cur / 4);
}
return ARG_MAX;
case _SC_NGROUPS_MAX:
/* Try to read the information from the /proc/sys/kernel/ngroups_max
file. */