126 lines
2.8 KiB
C
Executable File
126 lines
2.8 KiB
C
Executable File
/*
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* Asterisk -- An open source telephony toolkit.
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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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* 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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* \brief striplsd: Strip trailing digits app
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*
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* \ingroup applications
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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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/lock.h"
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static char *tdesc = "Strip trailing digits";
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static char *descrip =
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" StripLSD(count): Strips the trailing 'count' digits from the channel's\n"
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"associated extension. For example, the number 5551212 when stripped with a\n"
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"count of 4 would be changed to 555. The PBX will continue processing at the\n""next priority for the *new* extension.\n"
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" So, for example, if priority 3 of 5551212 is StripLSD 4, the next step\n"
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"executed will be priority 4 of 555. If you switch into an extension which\n"
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"has no first step, the PBX will treat it as though the user dialed an\n"
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"invalid extension.\n";
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static char *app = "StripLSD";
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static char *synopsis = "Strip Least Significant Digits";
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STANDARD_LOCAL_USER;
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LOCAL_USER_DECL;
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static int striplsd_exec(struct ast_channel *chan, void *data)
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{
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char newexten[AST_MAX_EXTENSION] = "";
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int maxbytes = 0;
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int stripcount = 0;
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int extlen = strlen(chan->exten);
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struct localuser *u;
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LOCAL_USER_ADD(u);
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maxbytes = sizeof(newexten) - 1;
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if (data) {
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stripcount = atoi(data);
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}
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if (!stripcount) {
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ast_log(LOG_DEBUG, "Ignoring, since number of digits to strip is 0\n");
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LOCAL_USER_REMOVE(u);
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return 0;
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}
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if (extlen > stripcount) {
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if (extlen - stripcount <= maxbytes) {
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maxbytes = extlen - stripcount;
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}
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strncpy(newexten, chan->exten, maxbytes);
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}
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strncpy(chan->exten, newexten, sizeof(chan->exten)-1);
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LOCAL_USER_REMOVE(u);
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return 0;
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}
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int unload_module(void)
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{
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int res;
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res = ast_unregister_application(app);
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STANDARD_HANGUP_LOCALUSERS;
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return res;
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}
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int load_module(void)
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{
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return ast_register_application(app, striplsd_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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