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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 1999 - 2005, Digium, Inc.
*
* Mark Spencer <markster@digium.com>
*
* 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
*
* \brief Execute arbitrary system commands
*
* \author Mark Spencer <markster@digium.com>
*
* \ingroup applications
*/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/pbx.h"
#include "asterisk/module.h"
#include "asterisk/app.h"
#include "asterisk/channel.h" /* autoservice */
static char *app = "System";
static char *app2 = "TrySystem";
static char *synopsis = "Execute a system command";
static char *synopsis2 = "Try executing a system command";
static char *chanvar = "SYSTEMSTATUS";
static char *descrip =
" System(command): Executes a command by using system(). If the command\n"
"fails, the console should report a fallthrough. \n"
"Result of execution is returned in the SYSTEMSTATUS channel variable:\n"
" FAILURE Could not execute the specified command\n"
" SUCCESS Specified command successfully executed\n";
static char *descrip2 =
" TrySystem(command): Executes a command by using system().\n"
"on any situation.\n"
"Result of execution is returned in the SYSTEMSTATUS channel variable:\n"
" FAILURE Could not execute the specified command\n"
" SUCCESS Specified command successfully executed\n"
" APPERROR Specified command successfully executed, but returned error code\n";
static int system_exec_helper(struct ast_channel *chan, void *data, int failmode)
{
int res = 0;
if (ast_strlen_zero(data)) {
ast_log(LOG_WARNING, "System requires an argument(command)\n");
pbx_builtin_setvar_helper(chan, chanvar, "FAILURE");
return failmode;
}
ast_autoservice_start(chan);
/* Do our thing here */
res = ast_safe_system((char *)data);
if ((res < 0) && (errno != ECHILD)) {
ast_log(LOG_WARNING, "Unable to execute '%s'\n", (char *)data);
pbx_builtin_setvar_helper(chan, chanvar, "FAILURE");
res = failmode;
} else if (res == 127) {
ast_log(LOG_WARNING, "Unable to execute '%s'\n", (char *)data);
pbx_builtin_setvar_helper(chan, chanvar, "FAILURE");
res = failmode;
} else {
if (res < 0)
res = 0;
if (res != 0)
pbx_builtin_setvar_helper(chan, chanvar, "APPERROR");
else
pbx_builtin_setvar_helper(chan, chanvar, "SUCCESS");
res = 0;
}
ast_autoservice_stop(chan);
return res;
}
static int system_exec(struct ast_channel *chan, void *data)
{
return system_exec_helper(chan, data, -1);
}
static int trysystem_exec(struct ast_channel *chan, void *data)
{
return system_exec_helper(chan, data, 0);
}
static int unload_module(void)
{
int res;
res = ast_unregister_application(app);
res |= ast_unregister_application(app2);
return res;
}
static int load_module(void)
{
int res;
res = ast_register_application(app2, trysystem_exec, synopsis2, descrip2);
res |= ast_register_application(app, system_exec, synopsis, descrip);
return res;
}
AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Generic System() application");
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