2 * Copyright (c) 1990 - 1994, Julianne Frances Haugh
3 * Copyright (c) 1996 - 2000, Marek Michałkiewicz
4 * Copyright (c) 2001 - 2005, Tomasz Kłoczko
5 * Copyright (c) 2005 - 2008, Nicolas François
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the copyright holders or contributors may not be used to
17 * endorse or promote products derived from this software without
18 * specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
23 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 * is_valid_user_name(), is_valid_group_name() - check the new user/group
54 static bool is_valid_name (const char *name)
57 * User/group names must match [a-z_][a-z0-9_-]*[$]
59 if (('\0' == *name) ||
60 !((('a' <= *name) && ('z' >= *name)) || ('_' == *name))) {
64 while ('\0' != *++name) {
65 if (!(( ('a' <= *name) && ('z' >= *name) ) ||
66 ( ('0' <= *name) && ('9' >= *name) ) ||
69 ( ('$' == *name) && ('\0' == *(name + 1)) )
78 bool is_valid_user_name (const char *name)
87 * User names are limited by whatever utmp can
88 * handle (usually max 8 characters).
90 if (strlen (name) > sizeof (ut.ut_user)) {
94 return is_valid_name (name);
97 bool is_valid_group_name (const char *name)
100 * Arbitrary limit for group names - max 16
101 * characters (same as on HP-UX 10).
103 if (strlen (name) > 16) {
107 return is_valid_name (name);