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