mirror of
https://sourceware.org/git/glibc.git
synced 2025-12-03 12:11:17 +03:00
5a82c74822
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
73 lines
2.9 KiB
C
73 lines
2.9 KiB
C
/* Threshold at which to diagnose ELOOP. Generic version.
|
|
Copyright (C) 2012-2019 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _ELOOP_THRESHOLD_H
|
|
#define _ELOOP_THRESHOLD_H 1
|
|
|
|
#include <limits.h>
|
|
#include <sys/param.h>
|
|
|
|
/* POSIX specifies SYMLOOP_MAX as the "Maximum number of symbolic
|
|
links that can be reliably traversed in the resolution of a
|
|
pathname in the absence of a loop." This makes it a minimum that
|
|
we should certainly accept. But it leaves open the possibility
|
|
that more might sometimes work--just not "reliably".
|
|
|
|
For example, Linux implements a complex policy whereby there is a
|
|
small limit on the number of direct symlink traversals (a symlink
|
|
to a symlink to a symlink), but larger limit on the total number of
|
|
symlink traversals overall. Hence the SYMLOOP_MAX number should be
|
|
the small one, but the limit library functions enforce on users
|
|
should be the larger one.
|
|
|
|
So, we use the larger of the reported SYMLOOP_MAX (if any) and our
|
|
own constant MIN_ELOOP_THRESHOLD, below. This constant should be
|
|
large enough that it never rules out a file name and directory tree
|
|
that the underlying system (i.e. calls to 'open' et al) would
|
|
resolve successfully. It should be small enough that actual loops
|
|
are detected without a huge number of iterations. */
|
|
|
|
#ifndef MIN_ELOOP_THRESHOLD
|
|
# define MIN_ELOOP_THRESHOLD 40
|
|
#endif
|
|
|
|
/* Return the maximum number of symlink traversals to permit
|
|
before diagnosing ELOOP. */
|
|
static inline unsigned int __attribute__ ((const))
|
|
__eloop_threshold (void)
|
|
{
|
|
#ifdef SYMLOOP_MAX
|
|
const int symloop_max = SYMLOOP_MAX;
|
|
#else
|
|
/* The function is marked 'const' even though we use memory and
|
|
call a function, because sysconf is required to return the
|
|
same value in every call and so it must always be safe to
|
|
call __eloop_threshold exactly once and reuse the value. */
|
|
static long int sysconf_symloop_max;
|
|
if (sysconf_symloop_max == 0)
|
|
sysconf_symloop_max = __sysconf (_SC_SYMLOOP_MAX);
|
|
const unsigned int symloop_max = (sysconf_symloop_max <= 0
|
|
? _POSIX_SYMLOOP_MAX
|
|
: sysconf_symloop_max);
|
|
#endif
|
|
|
|
return MAX (symloop_max, MIN_ELOOP_THRESHOLD);
|
|
}
|
|
|
|
#endif /* eloop-threshold.h */
|