115 lines
3.0 KiB
C
115 lines
3.0 KiB
C
/* Copyright (C) 1999-2018 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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<http://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include <pwd.h>
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#include <errno.h>
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#include <stdbool.h>
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/* We want to test getpw by calling it with a uid that does
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exist and one that doesn't exist. We track if we've met those
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conditions and exit. We also track if we've failed due to lack
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of memory. That constitutes all of the standard failure cases. */
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bool seen_hit;
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bool seen_miss;
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bool seen_oom;
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/* How many errors we've had while running the test. */
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int errors;
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static void
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check (uid_t uid)
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{
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int ret;
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char buf[1024];
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ret = getpw (uid, buf);
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/* Successfully read a password line. */
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if (ret == 0 && !seen_hit)
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{
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printf ("PASS: Read a password line given a uid.\n");
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seen_hit = true;
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}
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/* Failed to read a password line. Why? */
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if (ret == -1)
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{
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/* No entry? Technically the errno could be any number
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of values including ESRCH, EBADP or EPERM depending
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on the quality of the nss module that implements the
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underlying lookup. It should be 0 for getpw.*/
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if (errno == 0 && !seen_miss)
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{
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printf ("PASS: Found an invalid uid.\n");
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seen_miss = true;
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return;
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}
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/* Out of memory? */
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if (errno == ENOMEM && !seen_oom)
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{
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printf ("FAIL: Failed with ENOMEM.\n");
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seen_oom = true;
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errors++;
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}
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/* We don't expect any other values for errno. */
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if (errno != ENOMEM && errno != 0)
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errors++;
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}
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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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int ret;
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uid_t uid;
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/* Should return -1 and set errnot to EINVAL. */
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ret = getpw (0, NULL);
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if (ret == -1 && errno == EINVAL)
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{
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printf ("PASS: NULL buffer returns -1 and sets errno to EINVAL.\n");
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}
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else
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{
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printf ("FAIL: NULL buffer did not return -1 or set errno to EINVAL.\n");
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errors++;
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}
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/* Look for one matching uid, one non-found uid and then stop.
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Set an upper limit at the 16-bit UID mark; no need to go farther. */
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for (uid = 0; uid < ((uid_t) 65535); ++uid)
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{
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check (uid);
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if (seen_miss && seen_hit)
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break;
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}
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if (!seen_hit)
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printf ("FAIL: Did not read even one password line given a uid.\n");
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if (!seen_miss)
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printf ("FAIL: Did not find even one invalid uid.\n");
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return errors;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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