1 /* Copyright (C) 2009-2021 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 <stdbool.h>
20 #include <stdio.h>
21 #include <gshadow.h>
22 #include <nss.h>
23
24 #define _S(x) x ? x : ""
25
26
27 /* Write an entry to the given stream.
28 This must know the format of the group file. */
29 int
putsgent(const struct sgrp * g,FILE * stream)30 putsgent (const struct sgrp *g, FILE *stream)
31 {
32 int errors = 0;
33
34 if (g->sg_namp == NULL || !__nss_valid_field (g->sg_namp)
35 || !__nss_valid_field (g->sg_passwd)
36 || !__nss_valid_list_field (g->sg_adm)
37 || !__nss_valid_list_field (g->sg_mem))
38 {
39 __set_errno (EINVAL);
40 return -1;
41 }
42
43 _IO_flockfile (stream);
44
45 if (fprintf (stream, "%s:%s:", g->sg_namp, _S (g->sg_passwd)) < 0)
46 ++errors;
47
48 bool first = true;
49 char **sp = g->sg_adm;
50 if (sp != NULL)
51 while (*sp != NULL)
52 {
53 if (fprintf (stream, "%s%s", first ? "" : ",", *sp++) < 0)
54 {
55 ++errors;
56 break;
57 }
58 first = false;
59 }
60 if (putc_unlocked (':', stream) == EOF)
61 ++errors;
62
63 first = true;
64 sp = g->sg_mem;
65 if (sp != NULL)
66 while (*sp != NULL)
67 {
68 if (fprintf (stream, "%s%s", first ? "" : ",", *sp++) < 0)
69 {
70 ++errors;
71 break;
72 }
73 first = false;
74 }
75 if (putc_unlocked ('\n', stream) == EOF)
76 ++errors;
77
78 _IO_funlockfile (stream);
79
80 return errors ? -1 : 0;
81 }
82