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67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
/* Test for endpwent->getpwent crash for BZ #24695
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Copyright (C) 2019-2020 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 <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <pwd.h>
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#include <support/support.h>
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#include <support/check.h>
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/* It is entirely allowed to start with a getpwent call without
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resetting the state of the service via a call to setpwent.
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You can also call getpwent more times than you have entries in
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the service, and it should not fail. This test iteratates the
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database once, gets to the end, and then attempts a second
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iteration to look for crashes. */
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static void
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try_it (void)
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{
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struct passwd *pw;
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/* setpwent is intentionally omitted here. The first call to
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getpwent detects that it's first and initializes. The second
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time try_it is called, this "first call" was not detected before
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the fix, and getpwent would crash. */
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while ((pw = getpwent ()) != NULL)
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;
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/* We only care if this segfaults or not. */
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endpwent ();
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}
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static int
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do_test (void)
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{
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char *cmd;
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cmd = xasprintf ("%s/makedb -o /var/db/passwd.db /var/db/passwd.in",
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support_bindir_prefix);
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system (cmd);
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free (cmd);
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try_it ();
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try_it ();
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return 0;
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}
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#include <support/test-driver.c>
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