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
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2013 Gary Mills
*
* Copyright (c) 1997, by Sun Microsystems, Inc.
* All rights reserved.
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*LINTLIBRARY*/
#include <sys/types.h>
#include <stdio.h>
#include <ctype.h>
#include <userdefs.h>
#include <users.h>
#include <deflt.h>
#include <limits.h>
/* Defaults file */
#define DEFAULT_USERADD "/etc/default/useradd"
/*
* validate string given as login name.
*/
int
valid_login(char *login, struct passwd **pptr, int *warning)
{
struct passwd *t_pptr;
char *ptr = login;
int bad1char, badc, clower, len;
char c;
char action;
len = 0; clower = 0; badc = 0; bad1char = 0;
*warning = 0;
if (!login || !*login)
return (INVALID);
c = *ptr;
if (!isalpha(c))
bad1char++;
for (; c != '\0'; ptr++, c = *ptr) {
len++;
if (!isprint(c) || (c == ':') || (c == '\n'))
return (INVALID);
if (!isalnum(c) && c != '_' && c != '-' && c != '.')
badc++;
if (islower(c))
clower++;
}
action = 'w';
if (defopen(DEFAULT_USERADD) == 0) {
char *defptr;
if ((defptr = defread("EXCEED_TRAD=")) != NULL) {
char let = tolower(*defptr);
switch (let) {
case 'w': /* warning */
case 'e': /* error */
case 's': /* silent */
action = let;
break;
}
}
(void) defopen((char *)NULL);
}
if (len > LOGNAME_MAX)
return (LONGNAME);
if (len > LOGNAME_MAX_TRAD) {
if (action == 'w')
*warning = *warning | WARN_NAME_TOO_LONG;
else if (action == 'e')
return (LONGNAME);
}
if (clower == 0)
*warning = *warning | WARN_NO_LOWERCHAR;
if (badc != 0)
*warning = *warning | WARN_BAD_LOGNAME_CHAR;
if (bad1char != 0)
*warning = *warning | WARN_BAD_LOGNAME_FIRST;
if ((t_pptr = getpwnam(login)) != NULL) {
if (pptr) *pptr = t_pptr;
return (NOTUNIQUE);
}
return (UNIQUE);
}
|