152 lines
3.9 KiB
C
Executable File
152 lines
3.9 KiB
C
Executable File
/*
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* Asterisk -- A telephony toolkit for Linux.
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*
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* Execute arbitrary system commands
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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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
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*/
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/lock.h"
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#include "asterisk/file.h"
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#include "asterisk/logger.h"
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#include "asterisk/channel.h"
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#include "asterisk/pbx.h"
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#include "asterisk/module.h"
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#include "asterisk/app.h"
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#include "asterisk/options.h"
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static char *tdesc = "Generic System() application";
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static char *app = "System";
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static char *app2 = "TrySystem";
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static char *synopsis = "Execute a system command";
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static char *synopsis2 = "Try executing a system command";
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static char *chanvar = "SYSTEMSTATUS";
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static char *descrip =
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" System(command): Executes a command by using system(). Returns -1 on\n"
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"failure to execute the specified command. \n"
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"Result of execution is returned in the SYSTEMSTATUS channel variable:\n"
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" FAILURE Could not execute the specified command\n"
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" SUCCESS Specified command successfully executed\n"
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"\n"
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"Old behaviour:\n"
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"If the command itself executes but is in error, and if there exists\n"
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"a priority n + 101, where 'n' is the priority of the current instance,\n"
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"then the channel will be setup to continue at that priority level.\n"
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" Otherwise, System returns 0.\n";
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static char *descrip2 =
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" TrySystem(command): Executes a command by using system(). Returns 0\n"
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"on any situation.\n"
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"Result of execution is returned in the SYSTEMSTATUS channel variable:\n"
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" FAILURE Could not execute the specified command\n"
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" SUCCESS Specified command successfully executed\n"
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" APPERROR Specified command successfully executed, but returned error code\n"
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"\n"
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"Old behaviour:\nIf the command itself executes but is in error, and if\n"
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"there exists a priority n + 101, where 'n' is the priority of the current\n"
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"instance, then the channel will be setup to continue at that\n"
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"priority level. Otherwise, System returns 0.\n";
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STANDARD_LOCAL_USER;
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LOCAL_USER_DECL;
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static int system_exec_helper(struct ast_channel *chan, void *data, int failmode)
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{
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int res=0;
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struct localuser *u;
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if (!data) {
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ast_log(LOG_WARNING, "System requires an argument(command)\n");
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pbx_builtin_setvar_helper(chan, chanvar, "FAILURE");
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return failmode;
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}
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LOCAL_USER_ADD(u);
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/* Do our thing here */
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res = ast_safe_system((char *)data);
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if ((res < 0) && (errno != ECHILD)) {
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ast_log(LOG_WARNING, "Unable to execute '%s'\n", (char *)data);
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pbx_builtin_setvar_helper(chan, chanvar, "FAILURE");
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res = failmode;
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} else if (res == 127) {
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ast_log(LOG_WARNING, "Unable to execute '%s'\n", (char *)data);
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pbx_builtin_setvar_helper(chan, chanvar, "FAILURE");
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res = failmode;
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} else {
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if (res < 0)
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res = 0;
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if (option_priority_jumping && res)
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ast_goto_if_exists(chan, chan->context, chan->exten, chan->priority + 101);
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if (res != 0)
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pbx_builtin_setvar_helper(chan, chanvar, "APPERROR");
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else
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pbx_builtin_setvar_helper(chan, chanvar, "SUCCESS");
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res = 0;
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}
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LOCAL_USER_REMOVE(u);
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return res;
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}
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static int system_exec(struct ast_channel *chan, void *data)
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{
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return system_exec_helper(chan, data, -1);
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}
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static int trysystem_exec(struct ast_channel *chan, void *data)
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{
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return system_exec_helper(chan, data, 0);
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}
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int unload_module(void)
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{
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STANDARD_HANGUP_LOCALUSERS;
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ast_unregister_application(app2);
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return ast_unregister_application(app);
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}
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int load_module(void)
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{
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ast_register_application(app2, trysystem_exec, synopsis2, descrip2);
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return ast_register_application(app, system_exec, synopsis, descrip);
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}
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char *description(void)
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{
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return tdesc;
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}
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int usecount(void)
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{
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int res;
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STANDARD_USECOUNT(res);
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return res;
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}
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char *key()
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{
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return ASTERISK_GPL_KEY;
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}
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