summaryrefslogtreecommitdiff
path: root/libc/pwd_grp/getpwnam.c
blob: 36f6f09422c7bb7f24f12622902c8373f5076d30 (plain)
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
/*
 * getpwnam.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 <string.h>
#include <errno.h>
#include <fcntl.h>
#include <pwd.h>
#include <paths.h>
#include "config.h"

#define PWD_BUFFER_SIZE 256

/* file descriptor for the password file currently open */
static char line_buff[PWD_BUFFER_SIZE];
static struct passwd pwd;


int getpwnam_r (const char *name, struct passwd *password,
	char *buff, size_t buflen, struct passwd **crap)
{
	int passwd_fd;

	if (name == NULL) {
		__set_errno(EINVAL);
		return -1;
	}

	if ((passwd_fd = open(_PATH_PASSWD, O_RDONLY)) < 0)
		return -1;

	while (__getpwent_r(password, buff, buflen, passwd_fd) != -1)
		if (!strcmp(password->pw_name, name)) {
			close(passwd_fd);
			return 0;
		}

	close(passwd_fd);
	return -1;
}

struct passwd *getpwnam(const char *name)
{
    if (getpwnam_r(name, &pwd, line_buff, PWD_BUFFER_SIZE, NULL) != -1) {
	return &pwd;
    }
    return NULL;
}