app_voicemail.c

/*
 * Asterisk -- A telephony toolkit for Linux.
 *
 * Voicemail System (did you ever think it could be so easy?)
 * 
 * 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/lock.h>
#include <asterisk/file.h>
#include <asterisk/logger.h>
#include <asterisk/channel.h>
#include <asterisk/pbx.h>
#include <asterisk/options.h>
#include <asterisk/config.h>
#include <asterisk/say.h>
#include <asterisk/module.h>
#include <asterisk/adsi.h>
#include <asterisk/app.h>
#include <asterisk/manager.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <time.h>

#include <pthread.h>
#include "../asterisk.h"
#include "../astconf.h"

#define COMMAND_TIMEOUT 5000

#define VOICEMAIL_CONFIG "voicemail.conf"
#define ASTERISK_USERNAME "asterisk"

#define SENDMAIL "/usr/sbin/sendmail -t"

#define INTRO "vm-intro"

#define MAXMSG 100

#define MAX_OTHER_FORMATS 10

#define VM_SPOOL_DIR AST_SPOOL_DIR "/vm"

#define BASEMAXINLINE 256

#define BASELINELEN 72

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#define BASEMAXINLINE 256
#define BASELINELEN 72
#define eol "\r\n"

int iocp;
int iolen;
int linelength;
int ateof;
unsigned char iobuf[BASEMAXINLINE];

static char *tdesc = "Comedian Mail (Voicemail System)";

static char *adapp = "CoMa";

static char *adsec = "_AST";

static char *addesc = "Comedian Mail";

static int adver = 1;

static char *synopsis_vm =
"Leave a voicemail message";

static char *descrip_vm =
"  VoiceMail([s|u|b]extension): Leaves voicemail for a given  extension (must\n"
"be configured in voicemail.conf). If the extension is preceeded by an 's'"
"then instructions for leaving the message will be skipped.  If the extension\n"
"is preceeded by 'u' then the \"unavailable\" message will be played (that is, \n"
"/var/lib/asterisk/sounds/vm/<exten>/unavail) if it exists.  If the extension\n"
"is preceeded by a 'b' then the the busy message will be played (that is,\n"
"busy instead of unavail).  At most one of 's', 'u', or 'b' may be specified.\n"
"Returns  -1 on  error or mailbox not found, or if the user hangs up. \n"
"Otherwise, it returns 0. \n";

static char *synopsis_vmain =
"Enter voicemail system";

static char *descrip_vmain =
"  VoiceMailMain(): Enters the main voicemail system for the checking of voicemail.  The mailbox\n"
"can be passed as the option, which will stop the voicemail system from prompting the user\n"
"for the mailbox.  If the mailbox is preceeded by 's' then the passsword check will be skipped.\n"
"Returns -1 if the user hangs up or 0 otherwise.\n";

/* Leave a message */
static char *app = "VoiceMail";

/* Check mail, control, etc */
static char *app2 = "VoiceMailMain";

STANDARD_LOCAL_USER;

LOCAL_USER_DECL;

static int make_dir(char *dest, int len, char *ext, char *mailbox)
{
	return snprintf(dest, len, "%s/%s/%s/%s", (char *)ast_config_AST_SPOOL_DIR,"vm", ext, mailbox);
}

static int make_file(char *dest, int len, char *dir, int num)
{
	return snprintf(dest, len, "%s/msg%04d", dir, num);
}

static int vm_change_password(char *username, char *password, char *newpassword)
{
        /*  There's probably a better way of doing this. */
        /*  That's why I've put the password change in a separate function. */

        FILE *configin;
        FILE *configout;
		char inbuf[256];
		char orig[256];
		char tmpin[AST_CONFIG_MAX_PATH];
		char tmpout[AST_CONFIG_MAX_PATH];
		char *user, *pass, *rest, *trim;
	snprintf((char *)tmpin, sizeof(tmpin)-1, "%s/voicemail.conf",(char *)ast_config_AST_CONFIG_DIR);
	snprintf((char *)tmpout, sizeof(tmpout)-1, "%s/voicemail.conf.new",(char *)ast_config_AST_CONFIG_DIR);
        configin = fopen((char *)tmpin,"r");
        configout = fopen((char *)tmpout,"w+");

        while (!feof(configin)) {
			/* Read in the line */
			fgets(inbuf, sizeof(inbuf), configin);
			if (!feof(configin)) {
				/* Make a backup of it */
				memcpy(orig, inbuf, sizeof(orig));
				/* Strip trailing \n and comment */
				inbuf[strlen(inbuf) - 1] = '\0';
				user = strchr(inbuf, ';');
				if (user)
					*user = '\0';
				user=inbuf;
				while(*user < 33)
					user++;
				pass = strchr(user, '=');
				if (pass > user) {
					trim = pass - 1;
					while(*trim && *trim < 33) {
						*trim = '\0';
						trim--;
					}
				}
				if (pass) {
					*pass = '\0';
					pass++;
					if (*pass == '>')
						pass++;
					while(*pass && *pass < 33)
						pass++;
				}
				if (pass) {
					rest = strchr(pass,',');
					if (rest) {
						*rest = '\0';
						rest++;
					}
				} else
					rest = NULL;
				if (user && pass && *user && *pass && !strcmp(user, username) && !strcmp(pass, password)) {
					/* This is the line */
					if (rest) {
						fprintf(configout, "%s => %s,%s\n", username,newpassword,rest);
					} else {
						fprintf(configout, "%s => %s\n", username,newpassword);
					}
				} else {
					/* Put it back like it was */
					fprintf(configout, orig);
				}
			}
        }
        fclose(configin);
        fclose(configout);

        unlink((char *)tmpin);
        rename((char *)tmpout,(char *)tmpin);
	return(1);
}

static int
inbuf(FILE *fi)
{
	int l;

	if(ateof)
		return 0;

	if ( (l = fread(iobuf,1,BASEMAXINLINE,fi)) <= 0) {
		if(ferror(fi))
			return -1;

		ateof = 1;
		return 0;
	}

	iolen= l;
	iocp= 0;

	return 1;
}

static int 
inchar(FILE *fi)
{
	if(iocp>=iolen)
		if(!inbuf(fi))
			return EOF;

	return iobuf[iocp++];
}

static int
ochar(int c, FILE *so)
{
	if(linelength>=BASELINELEN) {
		if(fputs(eol,so)==EOF)
			return -1;

		linelength= 0;
	}

	if(putc(((unsigned char)c),so)==EOF)
		return -1;

	linelength++;

	return 1;
}

static int base_encode(char *filename, FILE *so)
{
	unsigned char dtable[BASEMAXINLINE];
	int i,hiteof= 0;
	FILE *fi;

	linelength = 0;
	iocp = BASEMAXINLINE;
	iolen = 0;
	ateof = 0;

	if ( !(fi = fopen(filename, "rb"))) {
		ast_log(LOG_WARNING, "Failed to open log file: %s: %s\n", filename, strerror(errno));
		return -1;
	}

	for(i= 0;i<9;i++){
		dtable[i]= 'A'+i;
		dtable[i+9]= 'J'+i;
		dtable[26+i]= 'a'+i;
		dtable[26+i+9]= 'j'+i;
	}
	for(i= 0;i<8;i++){
		dtable[i+18]= 'S'+i;
		dtable[26+i+18]= 's'+i;
	}
	for(i= 0;i<10;i++){
		dtable[52+i]= '0'+i;
	}
	dtable[62]= '+';
	dtable[63]= '/';

	while(!hiteof){
		unsigned char igroup[3],ogroup[4];
		int c,n;

		igroup[0]= igroup[1]= igroup[2]= 0;

		for(n= 0;n<3;n++){
			if ( (c = inchar(fi)) == EOF) {
				hiteof= 1;
				break;
			}

			igroup[n]= (unsigned char)c;
		}

		if(n> 0){
			ogroup[0]= dtable[igroup[0]>>2];
			ogroup[1]= dtable[((igroup[0]&3)<<4)|(igroup[1]>>4)];
			ogroup[2]= dtable[((igroup[1]&0xF)<<2)|(igroup[2]>>6)];
			ogroup[3]= dtable[igroup[2]&0x3F];

			if(n<3) {
				ogroup[3]= '=';

				if(n<2)
					ogroup[2]= '=';
			}

			for(i= 0;i<4;i++)
				ochar(ogroup[i], so);
		}
	}

	if(fputs(eol,so)==EOF)
		return 0;

	fclose(fi);

	return 1;
}

static int sendmail(char *srcemail, char *email, char *name, int msgnum, char *mailbox, char *callerid, char *attach, char *format, long duration)
{
	FILE *p;
	char date[256];
	char host[256];
	char who[256];
	char bound[256];
	char fname[256];
	char dur[256];
	time_t t;
	struct tm *tm;
	char *astattach;
	struct ast_config *cfg;
	p = popen(SENDMAIL, "w");
	cfg = ast_load(VOICEMAIL_CONFIG);
	if (!(astattach = ast_variable_retrieve(cfg, "general", "attach"))) 
		astattach = "yes";
	if (p) {
		gethostname(host, sizeof(host));
		if (strchr(srcemail, '@'))
			strncpy(who, srcemail, sizeof(who)-1);
		else {
			snprintf(who, sizeof(who), "%s@%s", srcemail, host);
		}
		snprintf(dur, sizeof(dur), "%ld:%02ld", duration / 60, duration % 60);
		time(&t);
		tm = localtime(&t);
		strftime(date, sizeof(date), "%a, %d %b %Y %H:%M:%S %z", tm);
		fprintf(p, "Date: %s\n", date);
		fprintf(p, "From: Asterisk PBX <%s>\n", who);
		fprintf(p, "To: %s <%s>\n", name, email);
		fprintf(p, "Subject: [PBX]: New message %d in mailbox %s\n", msgnum, mailbox);
		fprintf(p, "Message-ID: <Asterisk-%d-%s-%d@%s>\n", msgnum, mailbox, getpid(), host);
		fprintf(p, "MIME-Version: 1.0\n");
		if (ast_true(astattach)) {
			// Something unique.
			snprintf(bound, sizeof(bound), "Boundary=%d%s%d", msgnum, mailbox, getpid());

			fprintf(p, "Content-Type: MULTIPART/MIXED; BOUNDARY=\"%s\"\n\n\n", bound);

			fprintf(p, "--%s\n", bound);
		}
			fprintf(p, "Content-Type: TEXT/PLAIN; charset=US-ASCII\n\n");
			strftime(date, sizeof(date), "%A, %B %d, %Y at %r", tm);
			fprintf(p, "Dear %s:\n\n\tJust wanted to let you know you were just left a %s long message (number %d)\n"

		           "in mailbox %s from %s, on %s so you might\n"
				   "want to check it when you get a chance.  Thanks!\n\n\t\t\t\t--Asterisk\n\n", name, 
				dur, msgnum, mailbox, (callerid ? callerid : "an unknown caller"), date);
		if (ast_true(astattach)) {
			fprintf(p, "--%s\n", bound);
			fprintf(p, "Content-Type: audio/x-wav; name=\"msg%04d.%s\"\n", msgnum, format);
			fprintf(p, "Content-Transfer-Encoding: BASE64\n");
			fprintf(p, "Content-Description: Voicemail sound attachment.\n");
			fprintf(p, "Content-Disposition: attachment; filename=\"msg%04d.%s\"\n\n", msgnum, format);

			snprintf(fname, sizeof(fname), "%s.%s", attach, format);
			base_encode(fname, p);
			fprintf(p, "\n\n--%s--\n.\n", bound);
		}
		pclose(p);
	} else {
		ast_log(LOG_WARNING, "Unable to launch '%s'\n", SENDMAIL);
		return -1;
	}
	return 0;
}

static int get_date(char *s, int len)
{
	struct tm *tm;
	time_t t;
	t = time(0);
	tm = localtime(&t);
	return strftime(s, len, "%a %b %e %r %Z %Y", tm);
}

static int invent_message(struct ast_channel *chan, char *ext, int busy, char *ecodes)
{
	int res;
	char fn[256];
	snprintf(fn, sizeof(fn), "vm/%s/greet", ext);
	if (ast_fileexists(fn, NULL, NULL) > 0) {
		res = ast_streamfile(chan, fn, chan->language);
		if (res)
			return -1;
		res = ast_waitstream(chan, ecodes);
		if (res)
			return res;
	} else {
		res = ast_streamfile(chan, "vm-theperson", chan->language);
		if (res)
			return -1;
		res = ast_waitstream(chan, ecodes);
		if (res)
			return res;
		res = ast_say_digit_str(chan, ext, ecodes, chan->language);
		if (res)
			return res;
	}
	if (busy)
		res = ast_streamfile(chan, "vm-isonphone", chan->language);
	else
		res = ast_streamfile(chan, "vm-isunavail", chan->language);
	if (res)
		return -1;
	res = ast_waitstream(chan, ecodes);
	return res;
}

static int leave_voicemail(struct ast_channel *chan, char *ext, int silent, int busy, int unavail)
{
	struct ast_config *cfg;
	char *copy, *name, *passwd, *email, *fmt, *fmts;
	char comment[256];
	struct ast_filestream *writer=NULL, *others[MAX_OTHER_FORMATS];
	char *sfmt[MAX_OTHER_FORMATS];
	char txtfile[256];
	FILE *txt;
	int res = -1, fmtcnt=0, x;
	int msgnum;
	int outmsg=0;
	int wavother=0;
	int maxmessage=0;
	struct ast_frame *f;
	char date[256];
	char dir[256];
	char fn[256];
	char prefile[256]="";
	char *astemail;
	char *ecodes = "#";
	char *s;
	time_t start;
	time_t end;

	cfg = ast_load(VOICEMAIL_CONFIG);
	if (!cfg) {
		ast_log(LOG_WARNING, "No such configuration file %s\n", VOICEMAIL_CONFIG);
		return -1;
	}
	if (!(astemail = ast_variable_retrieve(cfg, "general", "serveremail"))) 
		astemail = ASTERISK_USERNAME;
	if ((s = ast_variable_retrieve(cfg, "general", "maxmessage"))) {
		if (sscanf(s, "%d", &x) == 1) {
			maxmessage = x;
		} else {
			ast_log(LOG_WARNING, "Invalid max message time length\n");
		}
	}
	if ((copy = ast_variable_retrieve(cfg, NULL, ext))) {
		char *stringp=NULL;
		/* Setup pre-file if appropriate */
		if (busy)
			snprintf(prefile, sizeof(prefile), "vm/%s/busy", ext);
		else if (unavail)
			snprintf(prefile, sizeof(prefile), "vm/%s/unavail", ext);
		/* Make sure they have an entry in the config */
		copy = strdup(copy);
		stringp=copy;
		passwd = strsep(&stringp, ",");
		name = strsep(&stringp, ",");
		email = strsep(&stringp, ",");
		make_dir(dir, sizeof(dir), ext, "");
		/* It's easier just to try to make it than to check for its existence */
		if (mkdir(dir, 0700) && (errno != EEXIST))
			ast_log(LOG_WARNING, "mkdir '%s' failed: %s\n", dir, strerror(errno));
		make_dir(dir, sizeof(dir), ext, "INBOX");
		if (mkdir(dir, 0700) && (errno != EEXIST))
			ast_log(LOG_WARNING, "mkdir '%s' failed: %s\n", dir, strerror(errno));
		if (ast_exists_extension(chan, chan->context, "o", 1, chan->callerid))
			ecodes = "#0";
		/* Play the beginning intro if desired */
		if (strlen(prefile)) {
			if (ast_fileexists(prefile, NULL, NULL) > 0) {
				if (ast_streamfile(chan, prefile, chan->language) > -1) 
				    silent = ast_waitstream(chan, "#0");
			} else {
				ast_log(LOG_DEBUG, "%s doesn't exist, doing what we can\n", prefile);
				silent = invent_message(chan, ext, busy, ecodes);
			}
			if (silent < 0) {
				ast_log(LOG_DEBUG, "Hang up during prefile playback\n");
				free(copy);
				return -1;
			}
		}
		/* If they hit "#" we should still play the beep sound */
		if (silent == '#') {
			if (!ast_streamfile(chan, "beep", chan->language) < 0)
				silent = 1;
			if (ast_waitstream(chan, "") <0) {
				ast_log(LOG_DEBUG, "Hangup during beep\n");
				free(copy);
				return -1;
			}
		} else if (silent == '0') {
			strncpy(chan->exten, "0", sizeof(chan->exten) - 1);
			chan->priority = 0;
			free(copy);
			return 0;
		}
		/* Stream an info message */
		if (silent || !ast_streamfile(chan, INTRO, chan->language)) {
			/* Wait for the message to finish */
			if (silent || !ast_waitstream(chan, "")) {
				if (!ast_streamfile(chan, "beep", chan->language) < 0)
					silent = 1;
				if (ast_waitstream(chan, "") <0) {
					ast_log(LOG_DEBUG, "Hangup during beep\n");
					free(copy);
					return -1;
				}
				fmt = ast_variable_retrieve(cfg, "general", "format");
				if (fmt) {
					char *stringp=NULL;
					fmts = strdup(fmt);
					stringp=fmts;
					fmt = strsep(&stringp, "|");
					msgnum = 0;
					do {
						make_file(fn, sizeof(fn), dir, msgnum);
						snprintf(comment, sizeof(comment), "Voicemail from %s to %s (%s) on %s\n",
											(chan->callerid ? chan->callerid : "Unknown"), 
											name, ext, chan->name);
						if (ast_fileexists(fn, NULL, chan->language) > 0) {
							msgnum++;
							continue;
						}
						writer = ast_writefile(fn, fmt, comment, O_EXCL, 1 /* check for other formats */, 0700);
						if (!writer)
							break;
						msgnum++;
					} while(!writer && (msgnum < MAXMSG));
					if (writer) {
						char *stringp=NULL;
						/* Store information */
						snprintf(txtfile, sizeof(txtfile), "%s.txt", fn);
 						txt = fopen(txtfile, "w+");
						if (txt) {
							get_date(date, sizeof(date));
							time(&start);
							fprintf(txt, 
";\n"
"; Message Information file\n"
";\n"
"[message]\n"
"origmailbox=%s\n"
"context=%s\n"
"exten=%s\n"
"priority=%d\n"
"callerchan=%s\n"
"callerid=%s\n"
"origdate=%s\n"
"origtime=%ld\n",
	ext,
	chan->context,
	chan->exten,
	chan->priority,
	chan->name,
	chan->callerid ? chan->callerid : "Unknown",
	date, time(NULL));
							fclose(txt);
						} else
							ast_log(LOG_WARNING, "Error opening text file for output\n");
	
						/* We need to reset these values */
						free(fmts);
						fmt = ast_variable_retrieve(cfg, "general", "format");
						fmts = strdup(fmt);
						stringp=fmts;
						strsep(&stringp, "|");
						while((fmt = strsep(&stringp, "|"))) {
							if (fmtcnt > MAX_OTHER_FORMATS - 1) {
								ast_log(LOG_WARNING, "Please increase MAX_OTHER_FORMATS in app_voicemail.c\n");
								break;
							}
							sfmt[fmtcnt++] = strdup(fmt);
						}
						for (x=0;x<fmtcnt;x++) {
							others[x] = ast_writefile(fn, sfmt[x], comment, 0, 0, 0700);
							if (!others[x]) {
								/* Ick, the other format didn't work, but be sure not
								   to leak memory here */
								int y;
								for(y=x+1;y < fmtcnt;y++)
									free(sfmt[y]);
								break;
							}
							if(!strcasecmp(sfmt[x], "wav"))
								wavother++;
							free(sfmt[x]);
						}
						if (x == fmtcnt) {
							/* Loop forever, writing the packets we read to the writer(s), until
							   we read a # or get a hangup */
							if (option_verbose > 2) 
								ast_verbose( VERBOSE_PREFIX_3 "Recording to %s\n", fn);
							f = NULL;
							for(;;) {
								res = ast_waitfor(chan, 2000);
								if (!res) {
									ast_log(LOG_DEBUG, "One waitfor failed, trying another\n");
									/* Try one more time in case of masq */
								 	res = ast_waitfor(chan, 2000);
									if (!res) {
										ast_log(LOG_WARNING, "No audio available on %s??\n", chan->name);
										res = -1;
									}
								}
								
								if (res < 0) {
									f = NULL;
									break;
								}

								f = ast_read(chan);
								if (!f)
									break;
								if (f->frametype == AST_FRAME_VOICE) {
									/* Write the primary format */
									res = ast_writestream(writer, f);
									if (res) {
										ast_log(LOG_WARNING, "Error writing primary frame\n");
										break;
									}
									/* And each of the others */
									for (x=0;x<fmtcnt;x++) {
										res |= ast_writestream(others[x], f);
									}
									/* Exit on any error */
									if (res) {
										ast_log(LOG_WARNING, "Error writing frame\n");
										ast_frfree(f);
										break;
									}
								} else if (f->frametype == AST_FRAME_DTMF) {
									if (f->subclass == '#') {
										if (option_verbose > 2) 
											ast_verbose( VERBOSE_PREFIX_3 "User ended message by pressing %c\n", f->subclass);
										outmsg=2;
										ast_frfree(f);
										res = 0;
										break;
									}
								}
								ast_frfree(f);
								time(&end);
								if (maxmessage && (end - start > maxmessage)) {
									if (option_verbose > 2) 
										ast_verbose( VERBOSE_PREFIX_3 "Message is too long, ending it now...\n");
									outmsg = 2;
									res = 0;
									break;
								}
							}
							if (!f) {
								if (option_verbose > 2) 
									ast_verbose( VERBOSE_PREFIX_3 "User hung up\n");
								res = -1;
								outmsg=1;
							}
						} else {
							ast_log(LOG_WARNING, "Error creating writestream '%s', format '%s'\n", fn, sfmt[x]); 
							free(sfmt[x]);
						}

						ast_closestream(writer);
						for (x=0;x<fmtcnt;x++) {
							if (!others[x])
								break;
							ast_closestream(others[x]);
						}
						if (outmsg) {
							if (outmsg > 1) {
								/* Let them know it worked */
								ast_streamfile(chan, "vm-msgsaved", chan->language);
								ast_waitstream(chan, "");
							}
							txt = fopen(txtfile, "a");
							if (txt) {
								time(&end);
								fprintf(txt, "duration=%ld\n", end-start);
								fclose(txt);
							}
							/* Send e-mail if applicable */
							if (email)
								sendmail(astemail, email, name, msgnum, ext, chan->callerid, fn, wavother ? "wav" : fmts, end - start);
						}
					} else {
						if (msgnum < MAXMSG)
							ast_log(LOG_WARNING, "Error writing to mailbox %s\n", ext);
						else
							ast_log(LOG_WARNING, "Too many messages in mailbox %s\n", ext);
					}
					free(fmts);
				} else 
					ast_log(LOG_WARNING, "No format to save messages in \n");
			}
		} else
			ast_log(LOG_WARNING, "Unable to playback instructions\n");
			
		free(copy);
	} else
		ast_log(LOG_WARNING, "No entry in voicemail config file for '%s'\n", ext);
	ast_destroy(cfg);
	/* Leave voicemail for someone */
	manager_event(EVENT_FLAG_CALL, "MessageWaiting", "Mailbox: %s\r\nWaiting: %d\r\n", ext, ast_app_has_voicemail(ext));
	return res;
}

static char *mbox(int id)
{
	switch(id) {
	case 0:
		return "INBOX";
	case 1:
		return "Old";
	case 2:
		return "Work";
	case 3:
		return "Family";
	case 4:
		return "Friends";
	case 5:
		return "Cust1";
	case 6:
		return "Cust2";
	case 7:
		return "Cust3";
	case 8:
		return "Cust4";
	case 9:
		return "Cust5";
	default:
		return "Unknown";
	}
}

static int count_messages(char *dir)
{
	int x;
	char fn[256];
	for (x=0;x<MAXMSG;x++) {
		make_file(fn, sizeof(fn), dir, x);
		if (ast_fileexists(fn, NULL, NULL) < 1)
			break;
	}
	return x;
}

static int play_and_wait(struct ast_channel *chan, char *fn)
{
	int d;
	d = ast_streamfile(chan, fn, chan->language);
	if (d)
		return d;
	d = ast_waitstream(chan, AST_DIGIT_ANY);
	return d;
}

static int say_and_wait(struct ast_channel *chan, int num)
{
	int d;
	d = ast_say_number(chan, num, AST_DIGIT_ANY, chan->language);
	return d;
}

static int copy(char *infile, char *outfile)
{
	int ifd;
	int ofd;
	int res;
	int len;
	char buf[4096];
	if ((ifd = open(infile, O_RDONLY)) < 0) {
		ast_log(LOG_WARNING, "Unable to open %s in read-only mode\n", infile);
		return -1;
	}
	if ((ofd = open(outfile, O_WRONLY | O_TRUNC | O_CREAT, 0600)) < 0) {
		ast_log(LOG_WARNING, "Unable to open %s in write-only mode\n", outfile);
		close(ifd);
		return -1;
	}
	do {
		len = read(ifd, buf, sizeof(buf));
		if (len < 0) {
			ast_log(LOG_WARNING, "Read failed on %s: %s\n", infile, strerror(errno));
			close(ifd);
			close(ofd);
			unlink(outfile);
		}
		if (len) {
			res = write(ofd, buf, len);
			if (res != len) {
				ast_log(LOG_WARNING, "Write failed on %s (%d of %d): %s\n", outfile, res, len, strerror(errno));
				close(ifd);
				close(ofd);
				unlink(outfile);
			}
		}
	} while(len);
	close(ifd);
	close(ofd);
	return 0;
}

static int save_to_folder(char *dir, int msg, char *username, int box)
{
	char sfn[256];
	char dfn[256];
	char ddir[256];
	char txt[256];
	char ntxt[256];
	char *dbox = mbox(box);
	int x;
	make_file(sfn, sizeof(sfn), dir, msg);
	make_dir(ddir, sizeof(ddir), username, dbox);
	mkdir(ddir, 0700);
	for (x=0;x<MAXMSG;x++) {
		make_file(dfn, sizeof(dfn), ddir, x);
		if (ast_fileexists(dfn, NULL, NULL) < 0)
			break;
	}
	if (x >= MAXMSG)
		return -1;
	ast_filecopy(sfn, dfn, NULL);
	if (strcmp(sfn, dfn)) {
		snprintf(txt, sizeof(txt), "%s.txt", sfn);
		snprintf(ntxt, sizeof(ntxt), "%s.txt", dfn);
		copy(txt, ntxt);
	}
	return 0;
}

static int adsi_logo(unsigned char *buf)
{
	int bytes = 0;
	bytes += adsi_display(buf + bytes, ADSI_COMM_PAGE, 1, ADSI_JUST_CENT, 0, "Comedian Mail", "");
	bytes += adsi_display(buf + bytes, ADSI_COMM_PAGE, 2, ADSI_JUST_CENT, 0, "(C)2002 LSS, Inc.", "");
	return bytes;
}

static int adsi_load_vmail(struct ast_channel *chan, int *useadsi)
{
	char buf[256];
	int bytes=0;
	int x;
	char num[5];

	*useadsi = 0;
	bytes += adsi_data_mode(buf + bytes);
 	adsi_transmit_message(chan, buf, bytes, ADSI_MSG_DISPLAY);

	bytes = 0;
	bytes += adsi_logo(buf);
	bytes += adsi_display(buf + bytes, ADSI_COMM_PAGE, 3, ADSI_JUST_CENT, 0, "Downloading Scripts", "");
#ifdef DISPLAY
	bytes += adsi_display(buf + bytes, ADSI_COMM_PAGE, 4, ADSI_JUST_LEFT, 0, "   .", "");
#endif
	bytes += adsi_set_line(buf + bytes, ADSI_COMM_PAGE, 1);
	bytes += adsi_data_mode(buf + bytes);
 	adsi_transmit_message(chan, buf, bytes, ADSI_MSG_DISPLAY);

	if (adsi_begin_download(chan, addesc, adapp, adsec, adver)) {
		bytes = 0;
		bytes += adsi_display(buf + bytes, ADSI_COMM_PAGE, 3, ADSI_JUST_CENT, 0, "Load Cancelled.", "");
		bytes += adsi_display(buf + bytes, ADSI_COMM_PAGE, 4, ADSI_JUST_CENT, 0, "ADSI Unavailable", "");
		bytes += adsi_set_line(buf + bytes, ADSI_COMM_PAGE, 1);
		bytes += adsi_voice_mode(buf + bytes, 0);
		adsi_transmit_message(chan, buf, bytes, ADSI_MSG_DISPLAY);
		return 0;
	}

#ifdef DISPLAY
	/* Add a dot */
	bytes = 0;
	bytes += adsi_logo(buf);
	bytes += adsi_display(buf + bytes, ADSI_COMM_PAGE, 3, ADSI_JUST_CENT, 0, "Downloading Scripts", "");
	bytes += adsi_display(buf + bytes, ADSI_COMM_PAGE, 4, ADSI_JUST_LEFT, 0, "   ..", "");
	bytes += adsi_set_line(buf + bytes, ADSI_COMM_PAGE, 1);
 	adsi_transmit_message(chan, buf, bytes, ADSI_MSG_DISPLAY);
#endif
	bytes = 0;
	bytes += adsi_load_soft_key(buf + bytes, ADSI_KEY_APPS + 0, "Listen", "Listen", "1", 1);
	bytes += adsi_load_soft_key(buf + bytes, ADSI_KEY_APPS + 1, "Folder", "Folder", "2", 1);
	bytes += adsi_load_soft_key(buf + bytes, ADSI_KEY_APPS + 2, "Advanced", "Advnced", "3", 1);
	bytes += adsi_load_soft_key(buf + bytes, ADSI_KEY_APPS + 3, "Options", "Options", "4", 1);
	bytes += adsi_load_soft_key(buf + bytes, ADSI_KEY_APPS + 4, "Help", "Help", "*", 1);
	bytes += adsi_load_soft_key(buf + bytes, ADSI_KEY_APPS + 5, "Exit", "Exit", "#", 1);
 	adsi_transmit_message(chan, buf, bytes, ADSI_MSG_DOWNLOAD);

#ifdef DISPLAY
	/* Add another dot */
	bytes = 0;
	bytes += adsi_display(buf + bytes, ADSI_COMM_PAGE, 4, ADSI_JUST_LEFT, 0, "   ...", "");
	bytes += adsi_set_line(buf + bytes, ADSI_COMM_PAGE, 1);
 	adsi_transmit_message(chan, buf, bytes, ADSI_MSG_DISPLAY);
#endif

	bytes = 0;
	/* These buttons we load but don't use yet */
	bytes += adsi_load_soft_key(buf + bytes, ADSI_KEY_APPS + 6, "Previous", "Prev", "4", 1);
	bytes += adsi_load_soft_key(buf + bytes, ADSI_KEY_APPS + 8, "Repeat", "Repeat", "5", 1);
	bytes += adsi_load_soft_key(buf + bytes, ADSI_KEY_APPS + 7, "Delete", "Delete", "7", 1);
	bytes += adsi_load_soft_key(buf + bytes, ADSI_KEY_APPS + 9, "Next", "Next", "6", 1);
	bytes += adsi_load_soft_key(buf + bytes, ADSI_KEY_APPS + 10, "Save", "Save", "9", 1);
	bytes += adsi_load_soft_key(buf + bytes, ADSI_KEY_APPS + 11, "Undelete", "Restore", "7", 1);
 	adsi_transmit_message(chan, buf, bytes, ADSI_MSG_DOWNLOAD);

#ifdef DISPLAY
	/* Add another dot */
	bytes = 0;
	bytes += adsi_display(buf + bytes, ADSI_COMM_PAGE, 4, ADSI_JUST_LEFT, 0, "   ....", "");
	bytes += adsi_set_line(buf + bytes, ADSI_COMM_PAGE, 1);
 	adsi_transmit_message(chan, buf, bytes, ADSI_MSG_DISPLAY);
#endif

	bytes = 0;
	for (x=0;x<5;x++) {
		snprintf(num, sizeof(num), "%d", x);
		bytes += adsi_load_soft_key(buf + bytes, ADSI_KEY_APPS + 12 + x, mbox(x), mbox(x), num, 1);
	}
	bytes += adsi_load_soft_key(buf + bytes, ADSI_KEY_APPS + 12 + 5, "Cancel", "Cancel", "#", 1);
 	adsi_transmit_message(chan, buf, bytes, ADSI_MSG_DOWNLOAD);

#ifdef DISPLAY
	/* Add another dot */
	bytes = 0;
	bytes += adsi_display(buf + bytes, ADSI_COMM_PAGE, 4, ADSI_JUST_LEFT, 0, "   .....", "");
	bytes += adsi_set_line(buf + bytes, ADSI_COMM_PAGE, 1);
 	adsi_transmit_message(chan, buf, bytes, ADSI_MSG_DISPLAY);
#endif

	if (adsi_end_download(chan)) {
		bytes = 0;
		bytes += adsi_display(buf + bytes, ADSI_COMM_PAGE, 3, ADSI_JUST_CENT, 0, "Download Unsuccessful.", "");
		bytes += adsi_display(buf + bytes, ADSI_COMM_PAGE, 4, ADSI_JUST_CENT, 0, "ADSI Unavailable", "");
		bytes += adsi_set_line(buf + bytes, ADSI_COMM_PAGE, 1);
		bytes += adsi_voice_mode(buf + bytes, 0);
		adsi_transmit_message(chan, buf, bytes, ADSI_MSG_DISPLAY);
		return 0;
	}
	bytes = 0;
	bytes += adsi_download_disconnect(buf + bytes);
 	adsi_transmit_message(chan, buf, bytes, ADSI_MSG_DOWNLOAD);

	ast_log(LOG_DEBUG, "Done downloading scripts...\n");

#ifdef DISPLAY
	/* Add last dot */
	bytes = 0;
	bytes += adsi_display(buf + bytes, ADSI_COMM_PAGE, 4, ADSI_JUST_CENT, 0, "   ......", "");
	bytes += adsi_set_line(buf + bytes, ADSI_COMM_PAGE, 1);
#endif
	ast_log(LOG_DEBUG, "Restarting session...\n");

	bytes = 0;
	/* Load the session now */
	if (adsi_load_session(chan, adapp, adver, 1) == 1) {
		*useadsi = 1;
		bytes += adsi_display(buf + bytes, ADSI_COMM_PAGE, 3, ADSI_JUST_CENT, 0, "Scripts Loaded!", "");
	} else
		bytes += adsi_display(buf + bytes, ADSI_COMM_PAGE, 3, ADSI_JUST_CENT, 0, "Load Failed!", "");

 	adsi_transmit_message(chan, buf, bytes, ADSI_MSG_DISPLAY);
	return 0;
}

static void adsi_begin(struct ast_channel *chan, int *useadsi)
{
	int x;
	if (!adsi_available(chan))
          return;
	x = adsi_load_session(chan, adapp, adver, 1);
	if (x < 0)
		return;