111 lines
3.0 KiB
C
111 lines
3.0 KiB
C
/*
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* Copyright (c) 1990 - 1994, Julianne Frances Haugh
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* Copyright (c) 1996 - 2000, Marek Michałkiewicz
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* Copyright (c) 2001 - 2005, Tomasz Kłoczko
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* Copyright (c) 2005 - 2008, Nicolas François
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the copyright holders or contributors may not be used to
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* endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* is_valid_user_name(), is_valid_group_name() - check the new user/group
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* name for validity;
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* return values:
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* true - OK
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* false - bad name
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*/
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#include <config.h>
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#ident "$Id$"
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#include <ctype.h>
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#include "defines.h"
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#include "chkname.h"
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#if HAVE_UTMPX_H
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#include <utmpx.h>
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#else
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#include <utmp.h>
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#endif
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static bool is_valid_name (const char *name)
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{
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/*
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* User/group names must match [a-z_][a-z0-9_-]*[$]
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*/
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if (('\0' == *name) ||
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!((('a' <= *name) && ('z' >= *name)) || ('_' == *name))) {
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return false;
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}
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while ('\0' != *++name) {
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if (!(( ('a' <= *name) && ('z' >= *name) ) ||
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( ('0' <= *name) && ('9' >= *name) ) ||
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('_' == *name) ||
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('-' == *name) ||
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( ('$' == *name) && ('\0' == *(name + 1)) )
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)) {
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return false;
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}
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}
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return true;
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}
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bool is_valid_user_name (const char *name)
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{
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#if HAVE_UTMPX_H
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struct utmpx ut;
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#else
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struct utmp ut;
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#endif
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/*
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* User names are limited by whatever utmp can
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* handle.
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*/
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if (strlen (name) > sizeof (ut.ut_user)) {
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return false;
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}
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return is_valid_name (name);
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}
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bool is_valid_group_name (const char *name)
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{
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/*
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* Arbitrary limit for group names.
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* HP-UX 10 limits to 16 characters
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*/
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if ( (GROUP_NAME_MAX_LENGTH > 0)
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&& (strlen (name) > GROUP_NAME_MAX_LENGTH)) {
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return false;
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}
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return is_valid_name (name);
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}
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