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a2b192295d
When resolving an absolute symlink that points back into patch's working directory, patch resolved the remainder of the symlink relative to the directory containing the symlink rather than the working directory. With symlinks in subdirectories, this can lead to patching the wrong file. * src/safe.c (struct symlink): Store the cached_dirfd a symlink resolves to. (cwd): Turn into a global variable that can be accessed from read-symlink(). (read_symlink): Pass the current cached_dirfd and return the cached_dirfd the symlink needs to be resolved in. (traverse_next): Continue traversal in the directory returned by read_symlink(). * tests/symlinks: Add absolute symlink test case. This closes bug #68311: https://savannah.gnu.org/bugs/?68311 |
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This is GNU patch, which applies diff files to original files. This version of patch has many changes made by the Free Software Foundation. They add support for: * handling arbitrary binary data and large files * the unified context diff format that GNU diff can produce * merging into files instead of creating reject files * making GNU Emacs-style backup files * improved interaction with RCS and SCCS * the GNU conventions for option parsing and configuring and compilation. * better POSIX compliance They also fix some bugs. If you obtained this file as part of a "git clone", then see the README-hacking file. If this file came to you as part of a tar archive, then see the file INSTALL for compilation and installation instructions. See the file NEWS for a list of major changes in the current release. A more detailed description of all changes can be found in the file ChangeLog in tar archives, and with "git log" which shows the version control history. Tutorial-style documentation for patch is included in the GNU Diffutils package; get GNU Diffutils 2.8 or later for up-to-date documentation for patch. Use `configure --disable-largefile' to disable large file support; this is reportedly necessary on Red Hat GNU/Linux 6.0 to avoid a C library bug. For MS-DOS using DJGPP tools, see the file pc/djgpp/README. For other systems, copy config.hin to config.h and change #undef statements in it to #define as appropriate for your system, and copy Makefile.in to Makefile and set the variables that are enclosed in @ signs as appropriate for your system. Please send bug reports for this version of patch to <bug-patch@gnu.org>. The Free Software Foundation is distributing this version of patch independently because as of this writing, Larry Wall has not released a new version of patch since mid-1988. We have heard that he has been too busy working on other things, like Perl. He has graciously agreed to let GNU `patch' be distributed under the terms of the GNU General Public License. For any copyright year range specified as YYYY-ZZZZ in this package note that the range specifies every single year in that closed interval. Please see the file COPYING for copying conditions. ------ Copyright 1989-2026 Free Software Foundation, Inc. Copyright 1984-1988 Larry Wall This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.