1 | /* Copyright (C) 1991-2020 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 <errno.h> |
19 | #include <stdio.h> |
20 | #include <pwd.h> |
21 | #include <nss.h> |
22 | |
23 | #define _S(x) x ?: "" |
24 | |
25 | /* Write an entry to the given stream. This must know the format of |
26 | the password file. If the input contains invalid characters, |
27 | return EINVAL, or replace them with spaces (if they are contained |
28 | in the GECOS field). */ |
29 | int |
30 | putpwent (const struct passwd *p, FILE *stream) |
31 | { |
32 | if (p == NULL || stream == NULL |
33 | || p->pw_name == NULL || !__nss_valid_field (p->pw_name) |
34 | || !__nss_valid_field (p->pw_passwd) |
35 | || !__nss_valid_field (p->pw_dir) |
36 | || !__nss_valid_field (p->pw_shell)) |
37 | { |
38 | __set_errno (EINVAL); |
39 | return -1; |
40 | } |
41 | |
42 | int ret; |
43 | char *gecos_alloc; |
44 | const char *gecos = __nss_rewrite_field (p->pw_gecos, &gecos_alloc); |
45 | |
46 | if (gecos == NULL) |
47 | return -1; |
48 | |
49 | if (p->pw_name[0] == '+' || p->pw_name[0] == '-') |
50 | ret = fprintf (stream, "%s:%s:::%s:%s:%s\n" , |
51 | p->pw_name, _S (p->pw_passwd), |
52 | gecos, _S (p->pw_dir), _S (p->pw_shell)); |
53 | else |
54 | ret = fprintf (stream, "%s:%s:%lu:%lu:%s:%s:%s\n" , |
55 | p->pw_name, _S (p->pw_passwd), |
56 | (unsigned long int) p->pw_uid, |
57 | (unsigned long int) p->pw_gid, |
58 | gecos, _S (p->pw_dir), _S (p->pw_shell)); |
59 | |
60 | free (gecos_alloc); |
61 | if (ret >= 0) |
62 | ret = 0; |
63 | return ret; |
64 | } |
65 | |