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 <grp.h> |
19 | #include <stdio.h> |
20 | #include <stdlib.h> |
21 | #include <string.h> |
22 | #include <sys/types.h> |
23 | #include <unistd.h> |
24 | |
25 | static int errors; |
26 | |
27 | static void |
28 | write_users (FILE *f, int large_pos, int pos) |
29 | { |
30 | int i; |
31 | |
32 | if (pos == large_pos) |
33 | { |
34 | if (large_pos == 3) |
35 | fprintf (f, ":three" ); |
36 | |
37 | /* we need more than 2048 bytes for proper testing. */ |
38 | for (i = 0; i < 500; i++) |
39 | fprintf (f, ",user%03d" , i); |
40 | } |
41 | fprintf (f, "\n" ); |
42 | |
43 | } |
44 | |
45 | static void |
46 | write_group (const char *filename, int pos) |
47 | { |
48 | FILE *f; |
49 | |
50 | f = fopen (filename, "w" ); |
51 | fprintf (f, "one:x:1:one" ); |
52 | write_users (f, large_pos: pos, pos: 1); |
53 | fprintf (f, "two:x:2:two" ); |
54 | write_users (f, large_pos: pos, pos: 2); |
55 | fprintf (f, "three:x:3" ); |
56 | write_users (f, large_pos: pos, pos: 3); |
57 | fclose (f); |
58 | } |
59 | |
60 | static void |
61 | test_entry (const char *name, gid_t gid, struct group *g) |
62 | { |
63 | if (!g) |
64 | { |
65 | printf (format: "Error: Entry is empty\n" ); |
66 | errors++; |
67 | return; |
68 | } |
69 | |
70 | if ((g->gr_gid == gid) && (strcmp (g->gr_name, name) == 0)) |
71 | printf (format: "Ok: %s: %d\n" , g->gr_name, g->gr_gid); |
72 | else |
73 | { |
74 | printf (format: "Error: %s: %d should be: %s: %d\n" , g->gr_name, g->gr_gid, |
75 | name, gid); |
76 | errors++; |
77 | } |
78 | } |
79 | |
80 | |
81 | static void |
82 | test_fgetgrent (const char *filename) |
83 | { |
84 | struct group *g; |
85 | FILE *f; |
86 | |
87 | f = fopen (filename,"r" ); |
88 | |
89 | g = fgetgrent (stream: f); |
90 | test_entry (name: "one" , gid: 1, g); |
91 | g = fgetgrent (stream: f); |
92 | test_entry (name: "two" , gid: 2, g); |
93 | g = fgetgrent (stream: f); |
94 | test_entry (name: "three" , gid: 3, g); |
95 | fclose (f); |
96 | } |
97 | |
98 | |
99 | int |
100 | main (int argc, char *argv[]) |
101 | { |
102 | char file[] = "/tmp/tst_fgetgrent.XXXXXX" ; |
103 | int fd = mkstemp (template: file); |
104 | if (fd == -1) |
105 | { |
106 | printf (format: "mkstemp failed: %m\n" ); |
107 | return 1; |
108 | } |
109 | close (fd: fd); |
110 | int i = 0; |
111 | |
112 | if (argc > 1) |
113 | i = atoi (argv[1]); |
114 | if (i > 3) |
115 | i = 3; |
116 | if (i) |
117 | printf (format: "Large group is group: %d\n" , i); |
118 | else |
119 | printf (format: "Not using a large group\n" ); |
120 | write_group (filename: file, pos: i); |
121 | test_fgetgrent (filename: file); |
122 | |
123 | remove (file); |
124 | |
125 | return (errors != 0); |
126 | } |
127 | |