1 | /* Copyright (C) 1999-2022 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 <stdio.h> |
19 | #include <pwd.h> |
20 | #include <errno.h> |
21 | #include <stdbool.h> |
22 | |
23 | /* We want to test getpw by calling it with a uid that does |
24 | exist and one that doesn't exist. We track if we've met those |
25 | conditions and exit. We also track if we've failed due to lack |
26 | of memory. That constitutes all of the standard failure cases. */ |
27 | bool seen_hit; |
28 | bool seen_miss; |
29 | bool seen_oom; |
30 | |
31 | /* How many errors we've had while running the test. */ |
32 | int errors; |
33 | |
34 | static void |
35 | check (uid_t uid) |
36 | { |
37 | int ret; |
38 | char buf[1024]; |
39 | |
40 | ret = getpw (uid: uid, buffer: buf); |
41 | |
42 | /* Successfully read a password line. */ |
43 | if (ret == 0 && !seen_hit) |
44 | { |
45 | printf (format: "PASS: Read a password line given a uid.\n" ); |
46 | seen_hit = true; |
47 | } |
48 | |
49 | /* Failed to read a password line. Why? */ |
50 | if (ret == -1) |
51 | { |
52 | /* No entry? Technically the errno could be any number |
53 | of values including ESRCH, EBADP or EPERM depending |
54 | on the quality of the nss module that implements the |
55 | underlying lookup. It should be 0 for getpw.*/ |
56 | if (errno == 0 && !seen_miss) |
57 | { |
58 | printf (format: "PASS: Found an invalid uid.\n" ); |
59 | seen_miss = true; |
60 | return; |
61 | } |
62 | |
63 | /* Out of memory? */ |
64 | if (errno == ENOMEM && !seen_oom) |
65 | { |
66 | printf (format: "FAIL: Failed with ENOMEM.\n" ); |
67 | seen_oom = true; |
68 | errors++; |
69 | } |
70 | |
71 | /* We don't expect any other values for errno. */ |
72 | if (errno != ENOMEM && errno != 0) |
73 | errors++; |
74 | } |
75 | } |
76 | |
77 | static int |
78 | do_test (void) |
79 | { |
80 | int ret; |
81 | uid_t uid; |
82 | |
83 | /* Should return -1 and set errnot to EINVAL. */ |
84 | ret = getpw (uid: 0, NULL); |
85 | if (ret == -1 && errno == EINVAL) |
86 | { |
87 | printf (format: "PASS: NULL buffer returns -1 and sets errno to EINVAL.\n" ); |
88 | } |
89 | else |
90 | { |
91 | printf (format: "FAIL: NULL buffer did not return -1 or set errno to EINVAL.\n" ); |
92 | errors++; |
93 | } |
94 | |
95 | /* Look for one matching uid, one non-found uid and then stop. |
96 | Set an upper limit at the 16-bit UID mark; no need to go farther. */ |
97 | for (uid = 0; uid < ((uid_t) 65535); ++uid) |
98 | { |
99 | check (uid); |
100 | if (seen_miss && seen_hit) |
101 | break; |
102 | } |
103 | |
104 | if (!seen_hit) |
105 | printf (format: "FAIL: Did not read even one password line given a uid.\n" ); |
106 | |
107 | if (!seen_miss) |
108 | printf (format: "FAIL: Did not find even one invalid uid.\n" ); |
109 | |
110 | return errors; |
111 | } |
112 | |
113 | #define TEST_FUNCTION do_test () |
114 | #include "../test-skeleton.c" |
115 | |