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568035b7 | 1 | /* Copyright (C) 1991-2013 Free Software Foundation, Inc. |
7ce241a0 UD |
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 | |
41bdb6e2 AJ |
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. | |
7ce241a0 UD |
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 | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
7ce241a0 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
7ce241a0 UD |
17 | |
18 | #include <errno.h> | |
19 | #include <stdio.h> | |
20 | #include <grp.h> | |
21 | ||
3ce1f295 UD |
22 | #define flockfile(s) _IO_flockfile (s) |
23 | #define funlockfile(s) _IO_funlockfile (s) | |
7ce241a0 UD |
24 | |
25 | #define _S(x) x ? x : "" | |
26 | ||
27 | /* Write an entry to the given stream. | |
28 | This must know the format of the group file. */ | |
29 | int | |
30 | putgrent (gr, stream) | |
31 | const struct group *gr; | |
32 | FILE *stream; | |
33 | { | |
34 | int retval; | |
35 | ||
a711dd4b | 36 | if (__builtin_expect (gr == NULL, 0) || __builtin_expect (stream == NULL, 0)) |
7ce241a0 UD |
37 | { |
38 | __set_errno (EINVAL); | |
39 | return -1; | |
40 | } | |
41 | ||
42 | flockfile (stream); | |
43 | ||
537e7234 UD |
44 | if (gr->gr_name[0] == '+' || gr->gr_name[0] == '-') |
45 | retval = fprintf (stream, "%s:%s::", | |
46 | gr->gr_name, _S (gr->gr_passwd)); | |
47 | else | |
48 | retval = fprintf (stream, "%s:%s:%lu:", | |
49 | gr->gr_name, _S (gr->gr_passwd), | |
50 | (unsigned long int) gr->gr_gid); | |
a711dd4b UD |
51 | if (__builtin_expect (retval, 0) < 0) |
52 | { | |
53 | funlockfile (stream); | |
54 | return -1; | |
55 | } | |
7ce241a0 UD |
56 | |
57 | if (gr->gr_mem != NULL) | |
58 | { | |
59 | int i; | |
60 | ||
61 | for (i = 0 ; gr->gr_mem[i] != NULL; i++) | |
8ba3c7d9 | 62 | if (fprintf (stream, i == 0 ? "%s" : ",%s", gr->gr_mem[i]) < 0) |
7ce241a0 UD |
63 | { |
64 | /* What else can we do? */ | |
65 | funlockfile (stream); | |
66 | return -1; | |
67 | } | |
68 | } | |
69 | ||
70 | retval = fputc_unlocked ('\n', stream); | |
71 | ||
72 | funlockfile (stream); | |
73 | ||
74 | return retval < 0 ? -1 : 0; | |
75 | } |