Zabbix

/*

** Zabbix

** Copyright (C) 2001-2023 Zabbix SIA

**

** This program is free software; you can redistribute it and/or modify

** it under the terms of the GNU General Public License as published by

** the Free Software Foundation; either version 2 of the License, or

** (at your option) any later version.

**

** This program 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 General Public License for more details.

**

** You should have received a copy of the GNU General Public License

** along with this program; if not, write to the Free Software

** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

**/

​

#include "zbxexpr.h"

​

#include "zbxnum.h"

#include "zbxstr.h"

​

/******************************************************************************

 *                                                                            *

 * Return value:  SUCCEED - char is allowed in item key                       *

 *                FAIL    - otherwise                                         *

 *                                                                            *

 * Comments: allowed characters in key are: '0-9a-zA-Z._-'                    *

 *           !!! Don't forget to sync the code with PHP !!!                   *

 *                                                                            *

 ******************************************************************************/

int zbx_is_key_char(unsigned char c)

{

    if (0 != isalnum(c))

        return SUCCEED;

​

    if (c == '.' || c == '_' || c == '-')

        return SUCCEED;

​

    return FAIL;

}

​

/******************************************************************************

 *                                                                            *

 * Purpose: Advances pointer to first invalid character in string             *

 *          ensuring that everything before it is a valid key.                *

 *                                                                            *

 *  e.g., system.run[cat /etc/passwd | awk -F: '{ print $1 }']                *

 *                                                                            *

 * Parameters: exp - [IN/OUT] pointer to first char of key                    *

 *                                                                            *

 *  e.g., {host:system.run[cat /etc/passwd | awk -F: '{ print $1 }'].last(0)} *

 *              ^                                                             *

 * Return value: Returns FAIL only if no key is present (length 0),           *

 *               or the whole string is invalid. SUCCEED otherwise.           *

 *                                                                            *

 * Comments: The pointer is advanced to the first invalid character even if   *

 *           FAIL is returned (meaning there is a syntax error in item key).  *

 *           If necessary, the caller must keep a copy of pointer original    *

 *           value.                                                           *

 *                                                                            *