| # Ensure we handle file systems returning no SELinux context, | |
| # which triggered a segmentation fault in coreutils-8.22. | |
| # This test is skipped on systems that lack LD_PRELOAD support; that's fine. | |
| # Similarly, on a system that lacks lgetfilecon altogether, skipping it is fine. | |
| # Copyright (C) 2014-2025 Free Software Foundation, Inc. | |
| # 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 <https://www.gnu.org/licenses/>. | |
| . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src | |
| print_ver_ cp | |
| require_gcc_shared_ | |
| require_selinux_ | |
| # Replace each getfilecon and lgetfilecon call with a call to these stubs. | |
| cat > k.c <<'EOF' || framework_failure_ | |
| #include <stdio.h> | |
| #include <selinux/selinux.h> | |
| #include <errno.h> | |
| int getfilecon (const char *path, char **con) | |
| { | |
| /* Leave a marker so we can identify if the function was intercepted. */ | |
| fclose(fopen("preloaded", "w")); | |
| errno=ENODATA; | |
| return -1; | |
| } | |
| int getfilecon_raw (const char *path, char **con) | |
| { return getfilecon (path, con); } | |
| int lgetfilecon (const char *path, char **con) | |
| { return getfilecon (path, con); } | |
| int lgetfilecon_raw (const char *path, char **con) | |
| { return getfilecon (path, con); } | |
| EOF | |
| # Then compile/link it: | |
| gcc_shared_ k.c k.so \ | |
| || skip_ 'failed to build SELinux shared library' | |
| touch file_src | |
| # New file with SELinux context optionally included | |
| LD_PRELOAD=$LD_PRELOAD:./k.so cp -a file_src file_dst || fail=1 | |
| # Existing file with SELinux context optionally included | |
| LD_PRELOAD=$LD_PRELOAD:./k.so cp -a file_src file_dst || fail=1 | |
| # ENODATA should give an immediate error when required to preserve ctx | |
| # This is debatable, and maybe we should not fail when no context available? | |
| ( export LD_PRELOAD=$LD_PRELOAD:./k.so | |
| returns_ 1 cp --preserve=context file_src file_dst ) || fail=1 | |
| test -e preloaded || skip_ 'LD_PRELOAD interception failed' | |
| Exit $fail | |