84 lines
1.6 KiB
C
84 lines
1.6 KiB
C
/*
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* SPDX-FileCopyrightText: 1990 - 1994, Julianne Frances Haugh
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* SPDX-FileCopyrightText: 1996 - 2000, Marek Michałkiewicz
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* SPDX-FileCopyrightText: 2001 - 2005, Tomasz Kłoczko
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* SPDX-FileCopyrightText: 2005 - 2008, Nicolas François
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*
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* SPDX-License-Identifier: BSD-3-Clause
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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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int allow_bad_names = false;
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static bool is_valid_name (const char *name)
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{
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if (allow_bad_names) {
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return true;
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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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/*
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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) > USER_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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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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