157 lines
4.7 KiB
C
157 lines
4.7 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2007, Digium, Inc.
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* SYSINFO function to return various system data.
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*
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* \note Inspiration and Guidance from Russell
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*
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* \author Jeff Peeler
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*
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* \ingroup functions
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*/
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/*** MODULEINFO
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<support_level>core</support_level>
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***/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision: 87233 $")
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#if defined(HAVE_SYSINFO)
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#include <sys/sysinfo.h>
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#endif
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#include "asterisk/module.h"
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#include "asterisk/pbx.h"
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/*** DOCUMENTATION
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<function name="SYSINFO" language="en_US">
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<synopsis>
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Returns system information specified by parameter.
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</synopsis>
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<syntax>
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<parameter name="parameter" required="true">
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<enumlist>
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<enum name="loadavg">
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<para>System load average from past minute.</para>
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</enum>
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<enum name="numcalls">
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<para>Number of active calls currently in progress.</para>
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</enum>
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<enum name="uptime">
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<para>System uptime in hours.</para>
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<note><para>This parameter is dependant upon operating system.</para></note>
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</enum>
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<enum name="totalram">
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<para>Total usable main memory size in KiB.</para>
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<note><para>This parameter is dependant upon operating system.</para></note>
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</enum>
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<enum name="freeram">
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<para>Available memory size in KiB.</para>
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<note><para>This parameter is dependant upon operating system.</para></note>
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</enum>
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<enum name="bufferram">
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<para>Memory used by buffers in KiB.</para>
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<note><para>This parameter is dependant upon operating system.</para></note>
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</enum>
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<enum name="totalswap">
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<para>Total swap space still available in KiB.</para>
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<note><para>This parameter is dependant upon operating system.</para></note>
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</enum>
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<enum name="freeswap">
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<para>Free swap space still available in KiB.</para>
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<note><para>This parameter is dependant upon operating system.</para></note>
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</enum>
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<enum name="numprocs">
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<para>Number of current processes.</para>
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<note><para>This parameter is dependant upon operating system.</para></note>
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</enum>
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</enumlist>
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</parameter>
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</syntax>
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<description>
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<para>Returns information from a given parameter.</para>
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</description>
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</function>
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***/
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static int sysinfo_helper(struct ast_channel *chan, const char *cmd, char *data,
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char *buf, size_t len)
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{
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#if defined(HAVE_SYSINFO)
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struct sysinfo sys_info;
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if (sysinfo(&sys_info)) {
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ast_log(LOG_ERROR, "FAILED to retrieve system information\n");
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return -1;
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}
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#endif
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if (ast_strlen_zero(data)) {
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ast_log(LOG_WARNING, "Syntax: ${SYSINFO(<parameter>)} - missing argument!)\n");
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return -1;
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} else if (!strcasecmp("loadavg", data)) {
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double curloadavg;
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getloadavg(&curloadavg, 1);
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snprintf(buf, len, "%f", curloadavg);
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} else if (!strcasecmp("numcalls", data)) {
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snprintf(buf, len, "%d", ast_active_calls());
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}
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#if defined(HAVE_SYSINFO)
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else if (!strcasecmp("uptime", data)) { /* in hours */
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snprintf(buf, len, "%ld", sys_info.uptime/3600);
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} else if (!strcasecmp("totalram", data)) { /* in KiB */
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snprintf(buf, len, "%ld",(sys_info.totalram * sys_info.mem_unit)/1024);
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} else if (!strcasecmp("freeram", data)) { /* in KiB */
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snprintf(buf, len, "%ld",(sys_info.freeram * sys_info.mem_unit)/1024);
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} else if (!strcasecmp("bufferram", data)) { /* in KiB */
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snprintf(buf, len, "%ld",(sys_info.bufferram * sys_info.mem_unit)/1024);
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} else if (!strcasecmp("totalswap", data)) { /* in KiB */
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snprintf(buf, len, "%ld",(sys_info.totalswap * sys_info.mem_unit)/1024);
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} else if (!strcasecmp("freeswap", data)) { /* in KiB */
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snprintf(buf, len, "%ld",(sys_info.freeswap * sys_info.mem_unit)/1024);
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} else if (!strcasecmp("numprocs", data)) {
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snprintf(buf, len, "%d", sys_info.procs);
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}
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#endif
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else {
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ast_log(LOG_ERROR, "Unknown sysinfo parameter type '%s'.\n", data);
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return -1;
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}
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return 0;
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}
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static struct ast_custom_function sysinfo_function = {
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.name = "SYSINFO",
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.read = sysinfo_helper,
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.read_max = 22,
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};
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static int unload_module(void)
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{
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return ast_custom_function_unregister(&sysinfo_function);
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}
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static int load_module(void)
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{
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return ast_custom_function_register(&sysinfo_function);
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}
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "System information related functions");
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