113 lines
3.7 KiB
C
113 lines
3.7 KiB
C
/* Test ldconfig does not segfault when aux-cache is corrupted (Bug 18093).
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Copyright (C) 2019-2022 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 License as
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published by the Free Software Foundation; either version 2.1 of the
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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; see the file COPYING.LIB. If
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not, see <https://www.gnu.org/licenses/>. */
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/* This test does the following:
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Run ldconfig to create the caches.
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Corrupt the caches.
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Run ldconfig again.
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At each step we verify that ldconfig does not crash. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include <sys/wait.h>
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#include <ftw.h>
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#include <stdint.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/xunistd.h>
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#include <dirent.h>
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static int
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display_info (const char *fpath, const struct stat *sb,
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int tflag, struct FTW *ftwbuf)
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{
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printf ("info: %-3s %2d %7jd %-40s %d %s\n",
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(tflag == FTW_D) ? "d" : (tflag == FTW_DNR) ? "dnr" :
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(tflag == FTW_DP) ? "dp" : (tflag == FTW_F) ? "f" :
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(tflag == FTW_NS) ? "ns" : (tflag == FTW_SL) ? "sl" :
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(tflag == FTW_SLN) ? "sln" : "???",
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ftwbuf->level, (intmax_t) sb->st_size,
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fpath, ftwbuf->base, fpath + ftwbuf->base);
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/* To tell nftw to continue. */
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return 0;
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}
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static void
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execv_wrapper (void *args)
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{
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char **argv = args;
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execv (argv[0], argv);
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FAIL_EXIT1 ("execv: %m");
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}
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/* Run ldconfig with a corrupt aux-cache, in particular we test for size
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truncation that might happen if a previous ldconfig run failed or if
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there were storage or power issues while we were writing the file.
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We want ldconfig not to crash, and it should be able to do so by
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computing the expected size of the file (bug 18093). */
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static int
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do_test (void)
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{
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char *prog = xasprintf ("%s/ldconfig", support_install_rootsbindir);
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char *args[] = { prog, NULL };
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const char *path = "/var/cache/ldconfig/aux-cache";
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struct stat64 fs;
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long int size, new_size, i;
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/* Create the needed directories. */
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xmkdirp ("/var/cache/ldconfig", 0777);
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/* Run ldconfig first to generate the aux-cache. */
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struct support_capture_subprocess result;
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result = support_capture_subprocess (execv_wrapper, args);
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support_capture_subprocess_check (&result, "execv", 0, sc_allow_none);
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support_capture_subprocess_free (&result);
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xstat (path, &fs);
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size = fs.st_size;
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/* Run 3 tests, each truncating aux-cache shorter and shorter. */
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for (i = 3; i > 0; i--)
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{
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new_size = size * i / 4;
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if (truncate (path, new_size))
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FAIL_EXIT1 ("truncation failed: %m");
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if (nftw (path, display_info, 1000, 0) == -1)
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FAIL_EXIT1 ("nftw failed.");
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/* Verify that ldconfig can run with a truncated
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aux-cache and doesn't crash. */
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struct support_capture_subprocess result;
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result = support_capture_subprocess (execv_wrapper, args);
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support_capture_subprocess_check (&result, "execv", 0, sc_allow_none);
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support_capture_subprocess_free (&result);
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}
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free (prog);
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return 0;
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}
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#include <support/test-driver.c>
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