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.

**/

​

/*

** Ideas from PostgreSQL implementation (src/backend/utils/misc/ps_status.c)

** were used in development of this file. Thanks to PostgreSQL developers!

**/

​

#include "setproctitle.h"

#include "zbxcommon.h"

​

#if defined(PS_DARWIN_ARGV)

#include <crt_externs.h>

#endif

​

#if defined(PS_OVERWRITE_ARGV)

/* external environment we got on startup */

extern char **environ;

static int  argc_ext_copied_first = 0, argc_ext_copied_last = 0, environ_ext_copied = 0;

static char **environ_ext = NULL;

​

/* internal copy of argv[] and environment variables */

static char **argv_int = NULL, **environ_int = NULL;

static const char   *empty_str = "";

​

/* ps display buffer */

static char *ps_buf = NULL;

static size_t   ps_buf_size = 0, prev_msg_size = 0;

#elif defined(PS_PSTAT_ARGV)

#define PS_BUF_SIZE 512

static char ps_buf[PS_BUF_SIZE], *p_msg = NULL;

static size_t   ps_buf_size = PS_BUF_SIZE, ps_buf_size_msg = PS_BUF_SIZE;

#endif

​

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

 *                                                                            *

 * Purpose: prepare for changing process commandline to display status        *

 *          messages with "ps" command on platforms which do not support      *

 *          setproctitle(). Depending on platform:                            *

 *             - make a copy of argc, argv[] and environment variables to     *

 *          enable overwriting original argv[].                               *

 *             - prepare a buffer with common part of status message.         *

 *                                                                            *

 * Comments: call this function soon after main process start, before using   *

 *           argv[] and environment variables.                                *

 *                                                                            *

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