1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
/* Copyright (C) 1991-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <nss.h>
#include <stdio.h>
#include <string.h>
#include <grp.h>
#define flockfile(s) _IO_flockfile (s)
#define funlockfile(s) _IO_funlockfile (s)
#define _S(x) x ? x : ""
/* Write an entry to the given stream.
This must know the format of the group file. */
int
putgrent (const struct group *gr, FILE *stream)
{
int retval;
if (__glibc_unlikely (gr == NULL) || __glibc_unlikely (stream == NULL)
|| gr->gr_name == NULL || !__nss_valid_field (gr->gr_name)
|| !__nss_valid_field (gr->gr_passwd)
|| !__nss_valid_list_field (gr->gr_mem))
{
__set_errno (EINVAL);
return -1;
}
flockfile (stream);
if (gr->gr_name[0] == '+' || gr->gr_name[0] == '-')
retval = fprintf (stream, "%s:%s::",
gr->gr_name, _S (gr->gr_passwd));
else
retval = fprintf (stream, "%s:%s:%lu:",
gr->gr_name, _S (gr->gr_passwd),
(unsigned long int) gr->gr_gid);
if (__builtin_expect (retval, 0) < 0)
{
funlockfile (stream);
return -1;
}
if (gr->gr_mem != NULL)
{
for (size_t i = 0; gr->gr_mem[i] != NULL; i++)
if (fprintf (stream, i == 0 ? "%s" : ",%s", gr->gr_mem[i]) < 0)
{
/* What else can we do? */
funlockfile (stream);
return -1;
}
}
retval = fputc_unlocked ('\n', stream);
funlockfile (stream);
return retval < 0 ? -1 : 0;
}
|
