Version 0.1.9 from FTP

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@360 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_agi.c

@@ -0,0 +1,809 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * Asterisk Gateway Interface
+ * 
+ * Copyright (C) 1999, Mark Spencer
+ *
+ * Mark Spencer <markster@linux-support.net>
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License
+ */
+
+#include <asterisk/file.h>
+#include <asterisk/logger.h>
+#include <asterisk/channel.h>
+#include <asterisk/pbx.h>
+#include <asterisk/module.h>
+#include <math.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/signal.h>
+#include <sys/time.h>
+#include <asterisk/cli.h>
+#include <asterisk/logger.h>
+#include <asterisk/options.h>
+#include <asterisk/image.h>
+#include <asterisk/say.h>
+#include "../asterisk.h"
+
+#include <pthread.h>
+
+#define MAX_ARGS 128
+
+/* Recycle some stuff from the CLI interface */
+#define fdprintf ast_cli
+
+typedef struct agi_command {
+	/* Null terminated list of the words of the command */
+	char *cmda[AST_MAX_CMD_LEN];
+	/* Handler for the command (fd for output, # of arguments, argument list). 
+	    Returns RESULT_SHOWUSAGE for improper arguments */
+	int (*handler)(struct ast_channel *chan, int fd, int argc, char *argv[]);
+	/* Summary of the command (< 60 characters) */
+	char *summary;
+	/* Detailed usage information */
+	char *usage;
+} agi_command;
+
+static char *tdesc = "Asterisk Gateway Interface (AGI)";
+
+static char *app = "AGI";
+
+static char *synopsis = "Executes an AGI compliant application";
+
+static char *descrip =
+"  AGI(command|args): Executes an Asterisk Gateway Interface compliant\n"
+"program on a channel.   AGI allows Asterisk to launch external programs\n"
+"written in any language to control a telephony channel, play audio,\n"
+"read DTMF digits, etc. by communicating with the AGI protocol on stdin\n"
+"and stdout.  Returns -1 on hangup or if application requested hangup, or\n"
+"0 on non-hangup exit.\n";
+
+STANDARD_LOCAL_USER;
+
+LOCAL_USER_DECL;
+
+#define TONE_BLOCK_SIZE 200
+
+static float loudness = 8192.0;
+
+unsigned char linear2ulaw(short sample);
+static void make_tone_block(unsigned char *data, float f1, int *x);
+
+static void make_tone_block(unsigned char *data, float f1, int *x)
+{
+int	i;
+float	val;
+
+	for(i = 0; i < TONE_BLOCK_SIZE; i++)
+	{
+		val = loudness * sin((f1 * 2.0 * M_PI * (*x)++)/8000.0);
+		data[i] = linear2ulaw((int)val);
+	 }		
+	  /* wrap back around from 8000 */
+	if (*x >= 8000) *x = 0;
+	return;
+}
+
+static int launch_script(char *script, char *args, int *fds, int *opid)
+{
+	char tmp[256];
+	int pid;
+	int toast[2];
+	int fromast[2];
+	int x;
+	if (script[0] != '/') {
+		snprintf(tmp, sizeof(tmp), "%s/%s", AST_AGI_DIR, script);
+		script = tmp;
+	}
+	if (pipe(toast)) {
+		ast_log(LOG_WARNING, "Unable to create toast pipe: %s\n",strerror(errno));
+		return -1;
+	}
+	if (pipe(fromast)) {
+		ast_log(LOG_WARNING, "unable to create fromast pipe: %s\n", strerror(errno));
+		close(toast[0]);
+		close(toast[1]);
+		return -1;
+	}
+	pid = fork();
+	if (pid < 0) {
+		ast_log(LOG_WARNING, "Failed to fork(): %s\n", strerror(errno));
+		return -1;
+	}
+	if (!pid) {
+		/* Redirect stdin and out */
+		dup2(fromast[0], STDIN_FILENO);
+		dup2(toast[1], STDOUT_FILENO);
+		/* Close everything but stdin/out/error */
+		for (x=STDERR_FILENO + 1;x<1024;x++) 
+			close(x);
+		/* Execute script */
+		execl(script, script, args, NULL);
+		ast_log(LOG_WARNING, "Failed to execute '%s': %s\n", script, strerror(errno));
+		exit(1);
+	}
+	if (option_verbose > 2) 
+		ast_verbose(VERBOSE_PREFIX_3 "Launched AGI Script %s\n", script);
+	fds[0] = toast[0];
+	fds[1] = fromast[1];
+	/* close what we're not using in the parent */
+	close(toast[1]);
+	close(fromast[0]);
+	*opid = pid;
+	return 0;
+		
+}
+
+static void setup_env(struct ast_channel *chan, char *request, int fd)
+{
+	/* Print initial environment, with agi_request always being the first
+	   thing */
+	fdprintf(fd, "agi_request: %s\n", request);
+	fdprintf(fd, "agi_channel: %s\n", chan->name);
+	fdprintf(fd, "agi_language: %s\n", chan->language);
+	fdprintf(fd, "agi_type: %s\n", chan->type);
+
+	/* ANI/DNIS */
+	fdprintf(fd, "agi_callerid: %s\n", chan->callerid ? chan->callerid : "");
+	fdprintf(fd, "agi_dnid: %s\n", chan->dnid ? chan->dnid : "");
+
+	/* Context information */
+	fdprintf(fd, "agi_context: %s\n", chan->context);
+	fdprintf(fd, "agi_extension: %s\n", chan->exten);
+	fdprintf(fd, "agi_priority: %d\n", chan->priority);
+
+	/* End with empty return */
+	fdprintf(fd, "\n");
+}
+
+static int handle_waitfordigit(struct ast_channel *chan, int fd, int argc, char *argv[])
+{
+	int res;
+	int to;
+	if (argc != 4)
+		return RESULT_SHOWUSAGE;
+	if (sscanf(argv[3], "%i", &to) != 1)
+		return RESULT_SHOWUSAGE;
+	res = ast_waitfordigit(chan, to);
+	fdprintf(fd, "200 result=%d\n", res);
+	if (res >= 0)
+		return RESULT_SUCCESS;
+	else
+		return RESULT_FAILURE;
+}
+
+static int handle_sendtext(struct ast_channel *chan, int fd, int argc, char *argv[])
+{
+	int res;
+	if (argc != 3)
+		return RESULT_SHOWUSAGE;
+	res = ast_sendtext(chan, argv[2]);
+	fdprintf(fd, "200 result=%d\n", res);
+	if (res >= 0)
+		return RESULT_SUCCESS;
+	else
+		return RESULT_FAILURE;
+}
+
+static int handle_sendimage(struct ast_channel *chan, int fd, int argc, char *argv[])
+{
+	int res;
+	if (argc != 3)
+		return RESULT_SHOWUSAGE;
+	res = ast_send_image(chan, argv[2]);
+	if (!chan->softhangup)
+		res = 0;
+	fdprintf(fd, "200 result=%d\n", res);
+	if (res >= 0)
+		return RESULT_SUCCESS;
+	else
+		return RESULT_FAILURE;
+}
+
+static int handle_streamfile(struct ast_channel *chan, int fd, int argc, char *argv[])
+{
+	int res;
+	if (argc != 4)
+		return RESULT_SHOWUSAGE;
+	res = ast_streamfile(chan, argv[2],chan->language);
+	if (res) {
+		fdprintf(fd, "200 result=%d\n", res);
+		if (res >= 0)
+			return RESULT_SHOWUSAGE;
+		else
+			return RESULT_FAILURE;
+	}
+	res = ast_waitstream(chan, argv[3]);
+	
+	fdprintf(fd, "200 result=%d\n", res);
+	if (res >= 0)
+		return RESULT_SUCCESS;
+	else
+		return RESULT_FAILURE;
+}
+
+static int handle_saynumber(struct ast_channel *chan, int fd, int argc, char *argv[])
+{
+	int res;
+	int num;
+	if (argc != 4)
+		return RESULT_SHOWUSAGE;
+	if (sscanf(argv[2], "%i", &num) != 1)
+		return RESULT_SHOWUSAGE;
+	res = ast_say_number(chan, num, chan->language);
+	fdprintf(fd, "200 result=%d\n", res);
+	if (res >= 0)
+		return RESULT_SUCCESS;
+	else
+		return RESULT_FAILURE;
+}
+
+int ast_app_getdata(struct ast_channel *c, char *prompt, char *s, int maxlen, int timeout);
+
+static int handle_getdata(struct ast_channel *chan, int fd, int argc, char *argv[])
+{
+	int res;
+	char data[50];
+	int max;
+	int timeout;
+
+	if (argc < 3)
+		return RESULT_SHOWUSAGE;
+	if (argc >= 4) timeout = atoi(argv[3]); else timeout = 0;
+	if (argc >= 5) max = atoi(argv[4]); else max = 50;
+	res = ast_app_getdata(chan, argv[2], data, max, timeout);
+	if (res == 1)
+		fdprintf(fd, "200 result=%s (timeout)\n", data);
+	else
+		fdprintf(fd, "200 result=%s\n", data);
+	if (res >= 0)
+		return RESULT_SUCCESS;
+	else
+		return RESULT_FAILURE;
+}
+
+static int handle_setcontext(struct ast_channel *chan, int fd, int argc, char *argv[])
+{
+
+	if (argc != 3)
+		return RESULT_SHOWUSAGE;
+	strncpy(chan->context, argv[2], sizeof(chan->context));
+	fdprintf(fd, "200 result=0\n");
+	return RESULT_SUCCESS;
+}
+	
+static int handle_setextension(struct ast_channel *chan, int fd, int argc, char **argv)
+{
+	if (argc != 3)
+		return RESULT_SHOWUSAGE;
+	strncpy(chan->exten, argv[2], sizeof(chan->exten));
+	fdprintf(fd, "200 result=0\n");
+	return RESULT_SUCCESS;
+}
+
+static int handle_setpriority(struct ast_channel *chan, int fd, int argc, char **argv)
+{
+	int pri;
+	if (argc != 3)
+		return RESULT_SHOWUSAGE;	
+	if (sscanf(argv[2], "%i", &pri) != 1)
+		return RESULT_SHOWUSAGE;
+	chan->priority = pri - 1;
+	fdprintf(fd, "200 result=0\n");
+	return RESULT_SUCCESS;
+}
+		
+static int ms_diff(struct timeval *tv1, struct timeval *tv2)
+{
+int	ms;
+	
+	ms = (tv1->tv_sec - tv2->tv_sec) * 1000;
+	ms += (tv1->tv_usec - tv2->tv_usec) / 1000;
+	return(ms);
+}
+
+static int handle_recordfile(struct ast_channel *chan, int fd, int argc, char *argv[])
+{
+	struct ast_filestream *fs;
+	struct ast_frame *f,wf;
+	struct timeval tv, start, lastout, now, notime = { 0,0 } ;
+	fd_set readfds;
+	unsigned char tone_block[TONE_BLOCK_SIZE];
+	int res = -1;
+	int ms,i,j;
+
+	if (argc < 6)
+		return RESULT_SHOWUSAGE;
+	if (sscanf(argv[5], "%i", &ms) != 1)
+		return RESULT_SHOWUSAGE;
+
+	if (argc > 6) { /* if to beep */
+		i = 0;
+		lastout.tv_sec = lastout.tv_usec = 0;
+		for(j = 0; j < 13; j++)
+		   {
+			do gettimeofday(&now,NULL);
+			while (lastout.tv_sec && 
+				(ms_diff(&now,&lastout) < 25));
+			lastout.tv_sec = now.tv_sec;
+			lastout.tv_usec = now.tv_usec;
+			wf.frametype = AST_FRAME_VOICE;
+			wf.subclass = AST_FORMAT_ULAW;
+			wf.offset = AST_FRIENDLY_OFFSET;
+			wf.mallocd = 0;
+			wf.data = tone_block;
+			wf.datalen = TONE_BLOCK_SIZE;				
+			/* make this tone block */
+			make_tone_block(tone_block,1000.0,&i);
+			wf.timelen = wf.datalen / 8;
+		        if (ast_write(chan, &wf)) {
+				fdprintf(fd, "200 result=%d (hangup)\n", 0);
+				return RESULT_FAILURE;
+			}
+			FD_ZERO(&readfds);
+			FD_SET(chan->fds[0],&readfds);
+			  /* if no read avail, do send again */
+			if (select(chan->fds[0] + 1,&readfds,NULL,
+				NULL,&notime) < 1) continue;
+			f = ast_read(chan);
+			if (!f) {
+				fdprintf(fd, "200 result=%d (hangup)\n", 0);
+				return RESULT_FAILURE;
+			}
+			switch(f->frametype) {
+			case AST_FRAME_DTMF:
+				if (strchr(argv[4], f->subclass)) {
+					/* This is an interrupting chracter */
+					fdprintf(fd, "200 result=%d (dtmf)\n", f->subclass);
+					ast_frfree(f);
+					return RESULT_SUCCESS;
+				}
+				break;
+			case AST_FRAME_VOICE:
+				break;  /* throw it away */
+			}
+			ast_frfree(f);
+		   }
+		  /* suck in 5 voice frames to make up for echo of beep, etc */
+		for(i = 0; i < 5; i++) {
+			f = ast_read(chan);
+			if (!f) {
+				fdprintf(fd, "200 result=%d (hangup)\n", 0);
+				return RESULT_FAILURE;
+			}
+			switch(f->frametype) {
+			case AST_FRAME_DTMF:
+				if (strchr(argv[4], f->subclass)) {
+					/* This is an interrupting chracter */
+					fdprintf(fd, "200 result=%d (dtmf)\n", f->subclass);
+					ast_frfree(f);
+					return RESULT_SUCCESS;
+				}
+				break;
+			case AST_FRAME_VOICE:
+				break;  /* throw it away */
+			}
+			ast_frfree(f);
+		}
+
+	}
+
+	fs = ast_writefile(argv[2], argv[3], NULL, O_CREAT | O_TRUNC | O_WRONLY, 0, 0644);
+	if (!fs) {
+		fdprintf(fd, "200 result=%d (writefile)\n", res);
+		return RESULT_FAILURE;
+	}
+	gettimeofday(&start, NULL);
+	gettimeofday(&tv, NULL);
+	while ((ms < 0) || (((tv.tv_sec - start.tv_sec) * 1000 + (tv.tv_usec - start.tv_usec)/1000) < ms)) {
+		res = ast_waitfor(chan, -1);
+		if (res < 0) {
+			ast_closestream(fs);
+			fdprintf(fd, "200 result=%d (waitfor)\n", res);
+			return RESULT_FAILURE;
+		}
+		f = ast_read(chan);
+		if (!f) {
+			fdprintf(fd, "200 result=%d (hangup)\n", 0);
+			ast_closestream(fs);
+			return RESULT_FAILURE;
+		}
+		switch(f->frametype) {
+		case AST_FRAME_DTMF:
+			if (strchr(argv[4], f->subclass)) {
+				/* This is an interrupting chracter */
+				fdprintf(fd, "200 result=%d (dtmf)\n", f->subclass);
+				ast_closestream(fs);
+				ast_frfree(f);
+				return RESULT_SUCCESS;
+			}
+			break;
+		case AST_FRAME_VOICE:
+			ast_writestream(fs, f);
+			break;
+		};
+		ast_frfree(f);
+		gettimeofday(&tv, NULL);
+	}
+	fdprintf(fd, "200 result=%d (timeout)\n", 0);
+	ast_closestream(fs);
+	return RESULT_SUCCESS;
+}
+
+static char usage_waitfordigit[] = 
+" Usage: WAIT FOR DIGIT <timeout>\n"
+"        Waits up to 'timeout' seconds for channel to receive a DTMF digit.\n"
+" Returns -1 on channel failure, 0 if no digit is received in the timeout, or\n"
+" the numerical value of the ascii of the digit if one is received.  Use -1\n"
+" for the timeout value if you desire the call to block indefinitely.\n";
+
+static char usage_sendtext[] =
+" Usage: SEND TEXT \"<text to send>\"\n"
+"        Sends the given text on a channel.  Most channels do not support the\n"
+" transmission of text.  Returns 0 if text is sent, or if the channel does not\n"
+" support text transmission.  Returns -1 only on error/hangup.  Text\n"
+" consisting of greater than one word should be placed in quotes since the\n"
+" command only accepts a single argument.\n";
+
+static char usage_sendimage[] =
+" Usage: SEND IMAGE <image>\n"
+"        Sends the given image on a channel.  Most channels do not support the\n"
+" transmission of images.  Returns 0 if image is sent, or if the channel does not\n"
+" support image transmission.  Returns -1 only on error/hangup.  Image names\n"
+" should not include extensions.\n";
+
+static char usage_streamfile[] =
+" Usage: STREAM FILE <filename> <escape digits>\n"
+"        Send the given file, allowing playback to be interrupted by the given\n"
+" digits, if any.  Use double quotes for the digits if you wish none to be\n"
+" permitted.  Returns 0 if playback completes without a digit being pressed, or\n"
+" the ASCII numerical value of the digit if one was pressed, or -1 on error or\n"
+" if the channel was disconnected.  Remember, the file extension must not be\n"
+" included in the filename.\n";
+
+static char usage_saynumber[] =
+" Usage: SAY NUMBER <number> <escape digits>\n"
+"        Say a given number, returning early if any of the given DTMF digits\n"
+" are received on the channel.  Returns 0 if playback completes without a digit\n"
+" being pressed, or the ASCII numerical value of the digit if one was pressed or\n"
+" -1 on error/hangup.\n";
+
+static char usage_getdata[] =
+" Usage: GET DATA <file to be streamed> [timeout] [max digits]\n"
+"	 Stream the given file, and recieve DTMF data. Returns the digits recieved\n"
+"from the channel at the other end.\n";
+
+static char usage_setcontext[] =
+" Usage: SET CONTEXT <desired context>\n"
+"	 Sets the context for continuation upon exiting the application.\n";
+
+static char usage_setextension[] =
+" Usage: SET EXTENSION <new extension>\n"
+"	 Changes the extension for continuation upon exiting the application.\n";
+
+static char usage_setpriority[] =
+" Usage: SET PRIORITY <num>\n"
+"	 Changes the priority for continuation upon exiting the application.\n";
+
+static char usage_recordfile[] =
+" Usage: RECORD FILE <filename> <format> <escape digits> <timeout> [BEEP]\n"
+"        Record to a file until a given dtmf digit in the sequence is received\n"
+" Returns -1 on hangup or error.  The format will specify what kind of file\n"
+" will be recorded.  The timeout is the maximum record time in milliseconds, or\n"
+" -1 for no timeout\n";
+
+agi_command commands[] = {
+	{ { "wait", "for", "digit", NULL }, handle_waitfordigit, "Waits for a digit to be pressed", usage_waitfordigit },
+	{ { "send", "text", NULL }, handle_sendtext, "Sends text to channels supporting it", usage_sendtext },
+	{ { "stream", "file", NULL }, handle_streamfile, "Sends audio file on channel", usage_streamfile },
+	{ { "send", "image", NULL }, handle_sendimage, "Sends images to channels supporting it", usage_sendimage },
+	{ { "say", "number", NULL }, handle_saynumber, "Says a given number", usage_saynumber },
+	{ { "get", "data", NULL }, handle_getdata, "Gets data on a channel", usage_getdata },
+	{ { "set", "context", NULL }, handle_setcontext, "Sets channel context", usage_setcontext },
+	{ { "set", "extension", NULL }, handle_setextension, "Changes channel extension", usage_setextension },
+	{ { "set", "priority", NULL }, handle_setpriority, "Prioritizes the channel", usage_setpriority },
+	{ { "record", "file", NULL }, handle_recordfile, "Records to a given file", usage_recordfile }
+};
+
+static agi_command *find_command(char *cmds[])
+{
+	int x;
+	int y;
+	int match;
+	for (x=0;x < sizeof(commands) / sizeof(commands[0]);x++) {
+		/* start optimistic */
+		match = 1;
+		for (y=0;match && cmds[y]; y++) {
+			/* If there are no more words in the command (and we're looking for
+			   an exact match) or there is a difference between the two words,
+			   then this is not a match */
+			if (!commands[x].cmda[y])
+				break;
+			if (strcasecmp(commands[x].cmda[y], cmds[y]))
+				match = 0;
+		}
+		/* If more words are needed to complete the command then this is not
+		   a candidate (unless we're looking for a really inexact answer  */
+		if (commands[x].cmda[y])
+			match = 0;
+		if (match)
+			return &commands[x];
+	}
+	return NULL;
+}
+
+
+static int parse_args(char *s, int *max, char *argv[])
+{
+	int x=0;
+	int quoted=0;
+	int escaped=0;
+	int whitespace=1;
+	char *cur;
+
+	cur = s;
+	while(*s) {
+		switch(*s) {
+		case '"':
+			/* If it's escaped, put a literal quote */
+			if (escaped) 
+				goto normal;
+			else 
+				quoted = !quoted;
+			if (quoted && whitespace) {
+				/* If we're starting a quote, coming off white space start a new word, too */
+				argv[x++] = cur;
+				whitespace=0;
+			}
+			escaped = 0;
+		break;
+		case ' ':
+		case '\t':
+			if (!quoted && !escaped) {
+				/* If we're not quoted, mark this as whitespace, and
+				   end the previous argument */
+				whitespace = 1;
+				*(cur++) = '\0';
+			} else
+				/* Otherwise, just treat it as anything else */ 
+				goto normal;
+			break;
+		case '\\':
+			/* If we're escaped, print a literal, otherwise enable escaping */
+			if (escaped) {
+				goto normal;
+			} else {
+				escaped=1;
+			}
+			break;
+		default:
+normal:
+			if (whitespace) {
+				if (x >= MAX_ARGS -1) {
+					ast_log(LOG_WARNING, "Too many arguments, truncating\n");
+					break;
+				}
+				/* Coming off of whitespace, start the next argument */
+				argv[x++] = cur;
+				whitespace=0;
+			}
+			*(cur++) = *s;
+			escaped=0;
+		}
+		s++;
+	}
+	/* Null terminate */
+	*(cur++) = '\0';
+	argv[x] = NULL;
+	*max = x;
+	return 0;
+}
+
+static int agi_handle_command(struct ast_channel *chan, int fd, char *buf)
+{
+	char *argv[MAX_ARGS];
+	int argc = 0;
+	int res;
+	agi_command *c;
+	argc = MAX_ARGS;
+	parse_args(buf, &argc, argv);
+#if	0
+	{ int x;
+	for (x=0;x<argc;x++) 
+		fprintf(stderr, "Got Arg%d: %s\n", x, argv[x]); }
+#endif
+	c = find_command(argv);
+	if (c) {
+		res = c->handler(chan, fd, argc, argv);
+		switch(res) {
+		case RESULT_SHOWUSAGE:
+			fdprintf(fd, "520-Invalid command syntax.  Proper usage follows:\n");
+			fdprintf(fd, c->usage);
+			fdprintf(fd, "520 End of proper usage.\n");
+			break;
+		case RESULT_FAILURE:
+			/* They've already given the failure.  We've been hung up on so handle this
+			   appropriately */
+			return -1;
+		}
+	} else {
+		fdprintf(fd, "510 Invalid or unknown command\n");
+	}
+	return 0;
+}
+
+static int run_agi(struct ast_channel *chan, char *request, int *fds, int pid)
+{
+	struct ast_channel *c;
+	int outfd;
+	int ms;
+	int returnstatus = 0;
+	struct ast_frame *f;
+	char buf[2048];
+	FILE *readf;
+	if (!(readf = fdopen(fds[0], "r"))) {
+		ast_log(LOG_WARNING, "Unable to fdopen file descriptor\n");
+		kill(pid, SIGHUP);
+		return -1;
+	}
+	setlinebuf(readf);
+	setup_env(chan, request, fds[1]);
+	for (;;) {
+		ms = -1;
+		c = ast_waitfor_nandfds(&chan, 1, &fds[0], 1, NULL, &outfd, &ms);
+		if (c) {
+			/* Idle the channel until we get a command */
+			f = ast_read(c);
+			if (!f) {
+				ast_log(LOG_DEBUG, "%s hungup\n", chan->name);
+				returnstatus = -1;
+				break;
+			} else {
+				ast_frfree(f);
+			}
+		} else if (outfd > -1) {
+			if (!fgets(buf, sizeof(buf), readf)) {
+				/* Program terminated */
+				if (returnstatus)
+					returnstatus = -1;
+				if (option_verbose > 2) 
+					ast_verbose(VERBOSE_PREFIX_3 "AGI Script %s completed, returning %d\n", request, returnstatus);
+				/* No need to kill the pid anymore, since they closed us */
+				pid = -1;
+				break;
+			}
+			returnstatus |= agi_handle_command(chan, fds[1], buf);
+			/* If the handle_command returns -1, we need to stop */
+			if (returnstatus < 0) {
+				break;
+			}
+		} else {
+			ast_log(LOG_WARNING, "No channel, no fd?\n");
+			returnstatus = -1;
+			break;
+		}
+	}
+	/* Notify process */
+	if (pid > -1)
+		kill(pid, SIGHUP);
+	fclose(readf);
+	return returnstatus;
+}
+
+static int agi_exec(struct ast_channel *chan, void *data)
+{
+	int res=0;
+	struct localuser *u;
+	char *args,*ringy;
+	char tmp[256];
+	int fds[2];
+	int pid;
+	if (!data || !strlen(data)) {
+		ast_log(LOG_WARNING, "AGI requires an argument (script)\n");
+		return -1;
+	}
+
+
+	strncpy(tmp, data, sizeof(tmp));
+	strtok(tmp, "|");
+	args = strtok(NULL, "|");
+	ringy = strtok(NULL,"|");
+	if (!args)
+		args = "";
+	LOCAL_USER_ADD(u);
+	 /* Answer if need be */
+        if (chan->state != AST_STATE_UP) {
+		if (ringy) { /* if for ringing first */
+			/* a little ringy-dingy first */
+		        ast_indicate(chan, AST_CONTROL_RINGING);  
+			sleep(3); 
+		}
+		if (ast_answer(chan)) {
+			LOCAL_USER_REMOVE(u);
+			return -1;
+		}
+	}
+	res = launch_script(tmp, args, fds, &pid);
+	if (!res) {
+		res = run_agi(chan, tmp, fds, pid);
+		close(fds[0]);
+		close(fds[1]);
+	}
+	LOCAL_USER_REMOVE(u);
+	return res;
+}
+
+int unload_module(void)
+{
+	STANDARD_HANGUP_LOCALUSERS;
+	return ast_unregister_application(app);
+}
+
+int load_module(void)
+{
+	return ast_register_application(app, agi_exec, synopsis, descrip);
+}
+
+char *description(void)
+{
+	return tdesc;
+}
+
+int usecount(void)
+{
+	int res;
+	STANDARD_USECOUNT(res);
+	return res;
+}
+
+char *key()
+{
+	return ASTERISK_GPL_KEY;
+}
+
+#define CLIP 32635
+#define BIAS 0x84
+
+unsigned char
+linear2ulaw(sample)
+short sample; {
+  static int exp_lut[256] = {0,0,1,1,2,2,2,2,3,3,3,3,3,3,3,3,
+                             4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
+                             5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
+                             5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
+                             6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
+                             6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
+                             6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
+                             6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
+                             7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+                             7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+                             7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+                             7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+                             7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+                             7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+                             7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+                             7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7};
+  int sign, exponent, mantissa;
+  unsigned char ulawbyte;
+ 
+  /* Get the sample into sign-magnitude. */
+  sign = (sample >> 8) & 0x80;          /* set aside the sign */
+  if (sign != 0) sample = -sample;              /* get magnitude */
+  if (sample > CLIP) sample = CLIP;             /* clip the magnitude */
+ 
+  /* Convert from 16 bit linear to ulaw. */
+  sample = sample + BIAS;
+  exponent = exp_lut[(sample >> 7) & 0xFF];
+  mantissa = (sample >> (exponent + 3)) & 0x0F;
+  ulawbyte = ~(sign | (exponent << 4) | mantissa);
+#ifdef ZEROTRAP
+  if (ulawbyte == 0) ulawbyte = 0x02;   /* optional CCITT trap */
+#endif
+ 
+  return(ulawbyte);
+}