1/* Copyright (C) 2015-2022 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <nss.h>
19#include <pwd.h>
20#include <stdbool.h>
21#include <stdio.h>
22#include <stdlib.h>
23#include <string.h>
24
25#include <support/support.h>
26
27int
28do_test (void)
29{
30 __nss_configure_lookup (dbname: "passwd", string: "files");
31
32 /* Count the number of entries in the password database, and fetch
33 data from the first and last entries. */
34 size_t count = 0;
35 struct passwd * pw;
36 char *first_name = NULL;
37 uid_t first_uid = 0;
38 char *last_name = NULL;
39 uid_t last_uid = 0;
40 setpwent ();
41 while ((pw = getpwent ()) != NULL)
42 {
43 if (first_name == NULL)
44 {
45 first_name = xstrdup (pw->pw_name);
46 first_uid = pw->pw_uid;
47 }
48
49 free (ptr: last_name);
50 last_name = xstrdup (pw->pw_name);
51 last_uid = pw->pw_uid;
52 ++count;
53 }
54 endpwent ();
55
56 if (count == 0)
57 {
58 printf (format: "No entries in the password database.\n");
59 return 0;
60 }
61
62 /* Try again, this time interleaving with name-based and UID-based
63 lookup operations. The counts do not match if the interleaved
64 lookups affected the enumeration. */
65 size_t new_count = 0;
66 setpwent ();
67 while ((pw = getpwent ()) != NULL)
68 {
69 if (new_count == count)
70 {
71 printf (format: "Additional entry in the password database.\n");
72 return 1;
73 }
74 ++new_count;
75 struct passwd *pw2 = getpwnam (name: first_name);
76 if (pw2 == NULL)
77 {
78 printf (format: "getpwnam (%s) failed: %m\n", first_name);
79 return 1;
80 }
81 pw2 = getpwnam (name: last_name);
82 if (pw2 == NULL)
83 {
84 printf (format: "getpwnam (%s) failed: %m\n", last_name);
85 return 1;
86 }
87 pw2 = getpwuid (uid: first_uid);
88 if (pw2 == NULL)
89 {
90 printf (format: "getpwuid (%llu) failed: %m\n",
91 (unsigned long long) first_uid);
92 return 1;
93 }
94 pw2 = getpwuid (uid: last_uid);
95 if (pw2 == NULL)
96 {
97 printf (format: "getpwuid (%llu) failed: %m\n",
98 (unsigned long long) last_uid);
99 return 1;
100 }
101 }
102 endpwent ();
103 if (new_count < count)
104 {
105 printf (format: "Missing entry in the password database.\n");
106 return 1;
107 }
108
109 return 0;
110}
111
112#define TIMEOUT 300
113#include <support/test-driver.c>
114

source code of glibc/nss/tst-nss-getpwent.c