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
|
/*
* pwent.c - This file is part of the libc-8086/pwd package for ELKS,
* Copyright (C) 1995, 1996 Nat Friedman <ndf@linux.mit.edu>.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <pwd.h>
#include <fcntl.h>
/*
* setpwent(), endpwent(), and getpwent() are included in the same object
* file, since one cannot be used without the other two, so it makes sense to
* link them all in together.
*/
/* file descriptor for the password file currently open */
static int pw_fd = -1;
void
setpwent(void)
{
if (pw_fd!=-1)
close(pw_fd);
pw_fd=open("/etc/passwd", O_RDONLY);
}
void
endpwent(void)
{
if (pw_fd!=-1)
close(pw_fd);
pw_fd=-1;
}
struct passwd *
getpwent(void)
{
if (pw_fd!=-1)
return __getpwent(pw_fd);
return NULL;
}
|
