mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-02 01:40:07 +00:00
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
103 lines
2.7 KiB
C
103 lines
2.7 KiB
C
/* Copyright (C) 2004-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdio_ext.h>
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#include <stdlib.h>
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#include <string.h>
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#include "libio/libioP.h"
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/* Return 1 if the whole area PTR .. PTR+SIZE is not writable.
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Return -1 if it is writable. */
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int
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__readonly_area (const char *ptr, size_t size)
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{
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const void *ptr_end = ptr + size;
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FILE *fp = fopen ("/proc/self/maps", "rce");
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if (fp == NULL)
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{
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/* It is the system administrator's choice to not have /proc
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available to this process (e.g., because it runs in a chroot
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environment. Don't fail in this case. */
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if (errno == ENOENT
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/* The kernel has a bug in that a process is denied access
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to the /proc filesystem if it is set[ug]id. There has
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been no willingness to change this in the kernel so
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far. */
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|| errno == EACCES)
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return 1;
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return -1;
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}
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/* We need no locking. */
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__fsetlocking (fp, FSETLOCKING_BYCALLER);
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char *line = NULL;
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size_t linelen = 0;
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while (! __feof_unlocked (fp))
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{
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if (_IO_getdelim (&line, &linelen, '\n', fp) <= 0)
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break;
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char *p;
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uintptr_t from = strtoul (line, &p, 16);
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if (p == line || *p++ != '-')
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break;
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char *q;
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uintptr_t to = strtoul (p, &q, 16);
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if (q == p || *q++ != ' ')
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break;
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if (from < (uintptr_t) ptr_end && to > (uintptr_t) ptr)
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{
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/* Found an entry that at least partially covers the area. */
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if (*q++ != 'r' || *q++ != '-')
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break;
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if (from <= (uintptr_t) ptr && to >= (uintptr_t) ptr_end)
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{
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size = 0;
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break;
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}
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else if (from <= (uintptr_t) ptr)
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size -= to - (uintptr_t) ptr;
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else if (to >= (uintptr_t) ptr_end)
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size -= (uintptr_t) ptr_end - from;
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else
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size -= to - from;
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if (!size)
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break;
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}
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}
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fclose (fp);
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free (line);
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/* If the whole area between ptr and ptr_end is covered by read-only
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VMAs, return 1. Otherwise return -1. */
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return size == 0 ? 1 : -1;
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}
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