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
77
78
79
80
81
82
83
84
85
86
87
88
|
/*
* libexplain - Explain errno values returned by libc functions
* Copyright (C) 2013 Peter Miller
*
* This program 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 3 of the License, or (at
* your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libexplain/ac/errno.h>
#include <libexplain/ac/grp.h>
#include <libexplain/getgrent.h>
#include <libexplain/output.h>
struct group *
explain_getgrent_or_die(void)
{
struct group *result;
int hold_errno;
hold_errno = errno;
errno = 0;
result = explain_getgrent_on_error();
if (!result)
{
/*
* The getgrent() function returns a pointer to a group
* structure, or NULL if there are no more entries or an error
* occurs.
*
* Upon error, errno may be set. If one wants to check errno
* after the call, it should be set to zero before the call.
*/
if (errno != 0)
explain_output_exit_failure();
}
errno = hold_errno;
return result;
}
struct group *
explain_getgrent_on_error(void)
{
struct group *result;
int hold_errno;
hold_errno = errno;
errno = 0;
#ifdef HAVE_GETGRENT
result = getgrent();
#else
errno = ENOSYS;
result = 0;
#endif
if (!result)
{
/*
* The getgrent() function returns a pointer to a group
* structure, or NULL if there are no more entries or an error
* occurs.
*
* Upon error, errno may be set. If one wants to check errno
* after the call, it should be set to zero before the call.
*/
if (errno != 0)
{
hold_errno = errno;
explain_output_error("%s", explain_errno_getgrent(hold_errno));
}
}
errno = hold_errno;
return result;
}
/* vim: set ts=8 sw=4 et : */
|
