#!/bin/sh # 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) 2014-2018 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 . . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src print_ver_ cp require_gcc_shared_ require_selinux_ # Replace each getfilecon and lgetfilecon call with a call to these stubs. cat > k.c <<'EOF' || framework_failure_ #include #include #include int getfilecon (const char *path, char **con) { /* Leave a marker so we can identify if the function was intercepted. */ fclose(fopen("preloaded", "w")); errno=ENODATA; return -1; } int lgetfilecon (const char *path, char **con) { return getfilecon (path, con); } EOF # Then compile/link it: gcc_shared_ k.c k.so \ || skip_ 'failed to build SELinux shared library' touch file_src # New file with SELinux context optionally included LD_PRELOAD=$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