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3a3fb2ed83
And simplify the interface of support_capture_subprogram_self_sgid.
Use the existing framework for temporary directories (now with
mode 0700) and directory/file deletion. Handle all execution
errors within support_capture_subprogram_self_sgid. In particular,
this includes test failures because the invoked program did not
exit with exit status zero. Existing tests that expect exit
status 42 are adjusted to use zero instead.
In addition, fix callers not to call exit (0) with test failures
pending (which may mask them, especially when running with --direct).
Fixes commit 35fc356fa3
("elf: Fix subprocess status handling for tst-dlopen-sgid (bug 32987)").
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
107 lines
3.3 KiB
C
107 lines
3.3 KiB
C
/* Test case for ignored LD_LIBRARY_PATH in static startug (bug 32976).
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Copyright (C) 2025 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 <dlfcn.h>
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#include <gnu/lib-names.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <support/capture_subprocess.h>
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#include <support/check.h>
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#include <support/support.h>
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#include <support/temp_file.h>
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#include <support/test-driver.h>
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#include <sys/wait.h>
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#include <unistd.h>
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/* This is the name of our test object. Use a custom module for
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testing, so that this object does not get picked up from the system
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path. */
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static const char dso_name[] = "tst-dlopen-sgid-mod.so";
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/* Used to mark the recursive invocation. */
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static const char magic_argument[] = "run-actual-test";
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static int
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do_test (void)
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{
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/* Pathname of the directory that receives the shared objects this
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test attempts to load. */
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char *libdir = support_create_temp_directory ("tst-dlopen-sgid-");
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/* This is supposed to be ignored and stripped. */
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TEST_COMPARE (setenv ("LD_LIBRARY_PATH", libdir, 1), 0);
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/* Copy of libc.so.6. */
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{
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char *from = xasprintf ("%s/%s", support_objdir_root, LIBC_SO);
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char *to = xasprintf ("%s/%s", libdir, LIBC_SO);
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add_temp_file (to);
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support_copy_file (from, to);
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free (to);
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free (from);
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}
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/* Copy of the test object. */
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{
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char *from = xasprintf ("%s/elf/%s", support_objdir_root, dso_name);
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char *to = xasprintf ("%s/%s", libdir, dso_name);
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add_temp_file (to);
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support_copy_file (from, to);
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free (to);
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free (from);
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}
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free (libdir);
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support_capture_subprogram_self_sgid (magic_argument);
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return 0;
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}
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static void
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alternative_main (int argc, char **argv)
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{
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if (argc == 2 && strcmp (argv[1], magic_argument) == 0)
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{
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if (getgid () == getegid ())
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/* This can happen if the file system is mounted nosuid. */
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FAIL_UNSUPPORTED ("SGID failed: GID and EGID match (%jd)\n",
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(intmax_t) getgid ());
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/* Should be removed due to SGID. */
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TEST_COMPARE_STRING (getenv ("LD_LIBRARY_PATH"), NULL);
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TEST_VERIFY (dlopen (dso_name, RTLD_NOW) == NULL);
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{
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const char *message = dlerror ();
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TEST_COMPARE_STRING (message,
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"tst-dlopen-sgid-mod.so:"
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" cannot open shared object file:"
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" No such file or directory");
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}
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support_record_failure_barrier ();
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exit (EXIT_SUCCESS);
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}
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}
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#define PREPARE alternative_main
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#include <support/test-driver.c>
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