118 lines
3.9 KiB
C
118 lines
3.9 KiB
C
/* Test ldconfig after /etc/ld.so.conf update and verify that a running process
|
|
observes changes to /etc/ld.so.cache.
|
|
|
|
Copyright (C) 2019-2022 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public License as
|
|
published by the Free Software Foundation; either version 2.1 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If
|
|
not, see <https://www.gnu.org/licenses/>. */
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
|
|
#include <support/capture_subprocess.h>
|
|
#include <support/check.h>
|
|
#include <support/support.h>
|
|
#include <support/xdlfcn.h>
|
|
#include <support/xstdio.h>
|
|
#include <support/xunistd.h>
|
|
|
|
|
|
#define DSO "libldconfig-ld-mod.so"
|
|
#define DSO_DIR "/tmp/tst-ldconfig"
|
|
#define CONF "/etc/ld.so.conf"
|
|
|
|
|
|
static void
|
|
run_ldconfig (void *x __attribute__((unused)))
|
|
{
|
|
char *prog = xasprintf ("%s/ldconfig", support_install_rootsbindir);
|
|
char *args[] = { prog, NULL };
|
|
|
|
execv (args[0], args);
|
|
FAIL_EXIT1 ("execv: %m");
|
|
}
|
|
|
|
|
|
/* Create a new directory.
|
|
Copy a test shared object there.
|
|
Try to dlopen it by soname. This should fail.
|
|
(Directory is not searched.)
|
|
Run ldconfig.
|
|
Try to dlopen it again. It should still fail.
|
|
(Directory is still not searched.)
|
|
Add the directory to /etc/ld.so.conf.
|
|
Try to dlopen it again. It should still fail.
|
|
(The loader does not read /etc/ld.so.conf, only /etc/ld.so.cache.)
|
|
Run ldconfig.
|
|
Try to dlopen it again. This should finally succeed. */
|
|
static int
|
|
do_test (void)
|
|
{
|
|
struct support_capture_subprocess result;
|
|
|
|
/* Create the needed directories. */
|
|
xmkdirp ("/var/cache/ldconfig", 0777);
|
|
xmkdirp (DSO_DIR, 0777);
|
|
|
|
/* Rename the DSO to start with "lib" because there's an undocumented
|
|
filter in ldconfig where it ignores any file that doesn't start with
|
|
"lib" (for regular shared libraries) or "ld-" (for ld-linux-*). */
|
|
char *mod_src_path = xasprintf ("%s/tst-ldconfig-ld-mod.so",
|
|
support_libdir_prefix);
|
|
if (rename (mod_src_path, "/tmp/tst-ldconfig/libldconfig-ld-mod.so"))
|
|
FAIL_EXIT1 ("Renaming/moving the DSO failed: %m");
|
|
free (mod_src_path);
|
|
|
|
|
|
/* Open the DSO. We expect this to fail - tst-ldconfig directory
|
|
is not searched. */
|
|
TEST_VERIFY_EXIT (dlopen (DSO, RTLD_NOW | RTLD_GLOBAL) == NULL);
|
|
|
|
FILE *fp = xfopen (CONF, "a+");
|
|
if (!fp)
|
|
FAIL_EXIT1 ("creating /etc/ld.so.conf failed: %m");
|
|
xfclose (fp);
|
|
|
|
/* Run ldconfig. */
|
|
result = support_capture_subprocess (run_ldconfig, NULL);
|
|
support_capture_subprocess_check (&result, "execv", 0, sc_allow_none);
|
|
|
|
/* Try to dlopen the same DSO again, we expect this to fail again. */
|
|
TEST_VERIFY_EXIT (dlopen (DSO, RTLD_NOW | RTLD_GLOBAL) == NULL);
|
|
|
|
/* Add tst-ldconfig directory to /etc/ld.so.conf. */
|
|
fp = xfopen (CONF, "w");
|
|
if (!(fwrite (DSO_DIR, 1, sizeof (DSO_DIR), fp)))
|
|
FAIL_EXIT1 ("updating /etc/ld.so.conf failed: %m");
|
|
xfclose (fp);
|
|
|
|
/* Try to dlopen the same DSO again, we expect this to still fail. */
|
|
TEST_VERIFY_EXIT (dlopen (DSO, RTLD_NOW | RTLD_GLOBAL) == NULL);
|
|
|
|
/* Run ldconfig again. */
|
|
result = support_capture_subprocess (run_ldconfig, NULL);
|
|
support_capture_subprocess_check (&result, "execv", 0, sc_allow_none);
|
|
support_capture_subprocess_free (&result);
|
|
|
|
/* Finally, we expect dlopen to pass now. */
|
|
TEST_VERIFY_EXIT (dlopen (DSO, RTLD_NOW | RTLD_GLOBAL) != NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|