Fri Aug 29 06:37:58 2008

Asterisk developer's documentation

---

app_voicemail.c

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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 Comedian Mail - Voicemail System
 * 
 * \par See also
 * \arg \ref Config_vm
 * \ingroup applications
 */

/*
 * 12-16-2004 : Support for Greek added by InAccess Networks (work funded by HOL, www.hol.gr)
 *           George Konstantoulakis <gkon@inaccessnetworks.com>
 *
 * 05-10-2005 : Support for Swedish and Norwegian added by Daniel Nylander, http://www.danielnylander.se/
 *
 * 05-11-2005 : An option for maximum number of messsages per mailbox added by GDS Partners (www.gdspartners.com)
 * 07-11-2005 : An issue with voicemail synchronization has been fixed by GDS Partners (www.gdspartners.com)
 *           Stojan Sljivic <stojan.sljivic@gdspartners.com>
 *
 */

#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 <sys/types.h>
#include <sys/mman.h>
#include <time.h>
#include <dirent.h>

#include "asterisk.h"

ASTERISK_FILE_VERSION(__FILE__, "$Revision: 75748 $")

#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 "asterisk/dsp.h"
#include "asterisk/localtime.h"
#include "asterisk/cli.h"
#include "asterisk/utils.h"
#ifdef USE_ODBC_STORAGE
#include "asterisk/res_odbc.h"
#endif

#define COMMAND_TIMEOUT 5000
#define  VOICEMAIL_DIR_MODE   0700
#define  VOICEMAIL_FILE_MODE  0600
#define  CHUNKSIZE   65536

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

/* Default mail command to mail voicemail. Change it with the
    mailcmd= command in voicemail.conf */
#define SENDMAIL "/usr/sbin/sendmail -t"

#define INTRO "vm-intro"

#define MAXMSG 100
#define MAXMSGLIMIT 9999

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

#define MAX_DATETIME_FORMAT   512
#define MAX_NUM_CID_CONTEXTS 10

#define VM_REVIEW    (1 << 0)
#define VM_OPERATOR     (1 << 1)
#define VM_SAYCID    (1 << 2)
#define VM_SVMAIL    (1 << 3)
#define VM_ENVELOPE     (1 << 4)
#define VM_SAYDURATION     (1 << 5)
#define VM_SKIPAFTERCMD    (1 << 6)
#define VM_FORCENAME    (1 << 7) /*!< Have new users record their name */
#define VM_FORCEGREET      (1 << 8) /*!< Have new users record their greetings */
#define VM_PBXSKIP      (1 << 9)
#define VM_DIRECFORWARD    (1 << 10)   /*!< directory_forward */
#define VM_ATTACH    (1 << 11)
#define VM_DELETE    (1 << 12)
#define VM_ALLOCED      (1 << 13)
#define VM_SEARCH    (1 << 14)

#define ERROR_LOCK_PATH    -100

enum {
   OPT_SILENT =           (1 << 0),
   OPT_BUSY_GREETING =    (1 << 1),
   OPT_UNAVAIL_GREETING = (1 << 2),
   OPT_RECORDGAIN =       (1 << 3),
   OPT_PREPEND_MAILBOX =  (1 << 4),
   OPT_PRIORITY_JUMP =    (1 << 5),
} vm_option_flags;

enum {
   OPT_ARG_RECORDGAIN = 0,
   OPT_ARG_ARRAY_SIZE = 1,
} vm_option_args;

AST_APP_OPTIONS(vm_app_options, {
   AST_APP_OPTION('s', OPT_SILENT),
   AST_APP_OPTION('b', OPT_BUSY_GREETING),
   AST_APP_OPTION('u', OPT_UNAVAIL_GREETING),
   AST_APP_OPTION_ARG('g', OPT_RECORDGAIN, OPT_ARG_RECORDGAIN),
   AST_APP_OPTION('p', OPT_PREPEND_MAILBOX),
   AST_APP_OPTION('j', OPT_PRIORITY_JUMP),
});

static int load_config(void);

/*! \page vmlang Voicemail Language Syntaxes Supported

   \par Syntaxes supported, not really language codes.
   \arg \b en - English
   \arg \b de - German
   \arg \b es - Spanish
   \arg \b fr - French
   \arg \b it = Italian
   \arg \b nl - Dutch
   \arg \b pt - Portuguese
   \arg \b gr - Greek
   \arg \b no - Norwegian
   \arg \b se - Swedish

German requires the following additional soundfile:
\arg \b 1F  einE (feminine)

Spanish requires the following additional soundfile:
\arg \b 1M      un (masculine)

Dutch, Portuguese & Spanish require the following additional soundfiles:
\arg \b vm-INBOXs singular of 'new'
\arg \b vm-Olds      singular of 'old/heard/read'

NB these are plural:
\arg \b vm-INBOX  nieuwe (nl)
\arg \b vm-Old    oude (nl)

Swedish uses:
\arg \b vm-nytt      singular of 'new'
\arg \b vm-nya    plural of 'new'
\arg \b vm-gammalt   singular of 'old'
\arg \b vm-gamla  plural of 'old'
\arg \b digits/ett   'one', not always same as 'digits/1'

Norwegian uses:
\arg \b vm-ny     singular of 'new'
\arg \b vm-nye    plural of 'new'
\arg \b vm-gammel singular of 'old'
\arg \b vm-gamle  plural of 'old'

Dutch also uses:
\arg \b nl-om     'at'?

Spanish also uses:
\arg \b vm-youhaveno

Italian requires the following additional soundfile:

For vm_intro_it:
\arg \b vm-nuovo  new
\arg \b vm-nuovi  new plural
\arg \b vm-vecchio   old
\arg \b vm-vecchi old plural

\note Don't use vm-INBOX or vm-Old, because they are the name of the INBOX and Old folders,
spelled among others when you have to change folder. For the above reasons, vm-INBOX
and vm-Old are spelled plural, to make them sound more as folder name than an adjective.

*/

struct baseio {
   int iocp;
   int iolen;
   int linelength;
   int ateof;
   unsigned char iobuf[BASEMAXINLINE];
};

/*! Structure for linked list of users */
struct ast_vm_user {
   char context[AST_MAX_CONTEXT];   /*!< Voicemail context */
   char mailbox[AST_MAX_EXTENSION];/*!< Mailbox id, unique within vm context */
   char password[80];      /*!< Secret pin code, numbers only */
   char fullname[80];      /*!< Full name, for directory app */
   char email[80];         /*!< E-mail address */
   char pager[80];         /*!< E-mail address to pager (no attachment) */
   char serveremail[80];      /*!< From: Mail address */
   char mailcmd[160];      /*!< Configurable mail command */
   char language[MAX_LANGUAGE];    /*!< Config: Language setting */
   char zonetag[80];    /*!< Time zone */
   char callback[80];
   char dialout[80];
   char uniqueid[20];      /*!< Unique integer identifier */
   char exit[80];
   unsigned int flags;     /*!< VM_ flags */ 
   int saydurationm;
   int maxmsg;       /*!< Maximum number of msgs per folder for this mailbox */
   struct ast_vm_user *next;
};

struct vm_zone {
   char name[80];
   char timezone[80];
   char msg_format[512];
   struct vm_zone *next;
};

struct vm_state {
   char curbox[80];
   char username[80];
   char curdir[PATH_MAX];
   char vmbox[PATH_MAX];
   char fn[PATH_MAX];
   char fn2[PATH_MAX];
   int *deleted;
   int *heard;
   int curmsg;
   int lastmsg;
   int newmessages;
   int oldmessages;
   int starting;
   int repeats;
};
static int advanced_options(struct ast_channel *chan, struct ast_vm_user *vmu, struct vm_state *vms, int msg,
             int option, signed char record_gain);
static int dialout(struct ast_channel *chan, struct ast_vm_user *vmu, char *num, char *outgoing_context);
static int play_record_review(struct ast_channel *chan, char *playfile, char *recordfile, int maxtime,
               char *fmt, int outsidecaller, struct ast_vm_user *vmu, int *duration, const char *unlockdir,
               signed char record_gain);
static int vm_tempgreeting(struct ast_channel *chan, struct ast_vm_user *vmu, struct vm_state *vms, char *fmtc, signed char record_gain);
static int vm_play_folder_name(struct ast_channel *chan, char *mbox);

static void apply_options(struct ast_vm_user *vmu, const char *options);

#ifdef USE_ODBC_STORAGE
static char odbc_database[80];
static char odbc_table[80];
#define RETRIEVE(a,b) retrieve_file(a,b)
#define DISPOSE(a,b) remove_file(a,b)
#define STORE(a,b,c,d) store_file(a,b,c,d)
#define EXISTS(a,b,c,d) (message_exists(a,b))
#define RENAME(a,b,c,d,e,f,g,h) (rename_file(a,b,c,d,e,f))
#define COPY(a,b,c,d,e,f,g,h) (copy_file(a,b,c,d,e,f))
#define DELETE(a,b,c) (delete_file(a,b))
#else
#define RETRIEVE(a,b)
#define DISPOSE(a,b)
#define STORE(a,b,c,d)
#define EXISTS(a,b,c,d) (ast_fileexists(c,NULL,d) > 0)
#define RENAME(a,b,c,d,e,f,g,h) (rename_file(g,h));
#define COPY(a,b,c,d,e,f,g,h) (copy_file(g,h));
#define DELETE(a,b,c) (vm_delete(c))
#endif

static char VM_SPOOL_DIR[AST_CONFIG_MAX_PATH];

static char ext_pass_cmd[128];

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

static char *addesc = "Comedian Mail";

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

static char *descrip_vm =
"  VoiceMail(mailbox[@context][&mailbox[@context]][...][|options]): This\n"
"application allows the calling party to leave a message for the specified\n"
"list of mailboxes. When multiple mailboxes are specified, the greeting will\n"
"be taken from the first mailbox specified. Dialplan execution will stop if the\n"
"specified mailbox does not exist.\n"
"  The Voicemail application will exit if any of the following DTMF digits are\n"
"received:\n"
"    0 - Jump to the 'o' extension in the current dialplan context.\n"
"    * - Jump to the 'a' extension in the current dialplan context.\n"
"  This application will set the following channel variable upon completion:\n"
"    VMSTATUS - This indicates the status of the execution of the VoiceMail\n"
"               application. The possible values are:\n"
"               SUCCESS | USEREXIT | FAILED\n\n"
"  Options:\n"
"    b    - Play the 'busy' greeting to the calling party.\n"
"    g(#) - Use the specified amount of gain when recording the voicemail\n"
"           message. The units are whole-number decibels (dB).\n"
"    s    - Skip the playback of instructions for leaving a message to the\n"
"           calling party.\n"
"    u    - Play the 'unavailable' greeting.\n"
"    j    - Jump to priority n+101 if the mailbox is not found or some other\n"
"           error occurs.\n";

static char *synopsis_vmain =
"Check Voicemail messages";

static char *descrip_vmain =
"  VoiceMailMain([mailbox][@context][|options]): This application allows the\n"
"calling party to check voicemail messages. A specific mailbox, and optional\n"
"corresponding context, may be specified. If a mailbox is not provided, the\n"
"calling party will be prompted to enter one. If a context is not specified,\n"
"the 'default' context will be used.\n\n"
"  Options:\n"
"    p    - Consider the mailbox parameter as a prefix to the mailbox that\n"
"           is entered by the caller.\n"
"    g(#) - Use the specified amount of gain when recording a voicemail\n"
"           message. The units are whole-number decibels (dB).\n"
"    s    - Skip checking the passcode for the mailbox.\n";

static char *synopsis_vm_box_exists =
"Check to see if Voicemail mailbox exists";

static char *descrip_vm_box_exists =
"  MailboxExists(mailbox[@context][|options]): Check to see if the specified\n"
"mailbox exists. If no voicemail context is specified, the 'default' context\n"
"will be used.\n"
"  This application will set the following channel variable upon completion:\n"
"    VMBOXEXISTSSTATUS - This will contain the status of the execution of the\n"
"                        MailboxExists application. Possible values include:\n"
"                        SUCCESS | FAILED\n\n"
"  Options:\n"
"    j - Jump to priority n+101 if the mailbox is found.\n";

static char *synopsis_vmauthenticate =
"Authenticate with Voicemail passwords";

static char *descrip_vmauthenticate =
"  VMAuthenticate([mailbox][@context][|options]): This application behaves the\n"
"same way as the Authenticate application, but the passwords are taken from\n"
"voicemail.conf.\n"
"  If the mailbox is specified, only that mailbox's password will be considered\n"
"valid. If the mailbox is not specified, the channel variable AUTH_MAILBOX will\n"
"be set with the authenticated mailbox.\n\n"
"  Options:\n"
"    s - Skip playing the initial prompts.\n";

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

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

static char *app3 = "MailboxExists";
static char *app4 = "VMAuthenticate";

AST_MUTEX_DEFINE_STATIC(vmlock);
struct ast_vm_user *users;
struct ast_vm_user *usersl;
struct vm_zone *zones = NULL;
struct vm_zone *zonesl = NULL;
static int maxsilence;
static int maxmsg;
static int silencethreshold = 128;
static char serveremail[80];
static char mailcmd[160];  /* Configurable mail cmd */
static char externnotify[160]; 

static char vmfmts[80];
static int vmminmessage;
static int vmmaxmessage;
static int maxgreet;
static int skipms;
static int maxlogins;

static struct ast_flags globalflags = {0};

static int saydurationminfo;

static char dialcontext[AST_MAX_CONTEXT];
static char callcontext[AST_MAX_CONTEXT];
static char exitcontext[AST_MAX_CONTEXT];

static char cidinternalcontexts[MAX_NUM_CID_CONTEXTS][64];


static char *emailbody = NULL;
static char *emailsubject = NULL;
static char *pagerbody = NULL;
static char *pagersubject = NULL;
static char fromstring[100];
static char pagerfromstring[100];
static char emailtitle[100];
static char charset[32] = "ISO-8859-1";

static unsigned char adsifdn[4] = "\x00\x00\x00\x0F";
static unsigned char adsisec[4] = "\x9B\xDB\xF7\xAC";
static int adsiver = 1;
static char emaildateformat[32] = "%A, %B %d, %Y at %r";

STANDARD_LOCAL_USER;

LOCAL_USER_DECL;

static void populate_defaults(struct ast_vm_user *vmu)
{
   ast_copy_flags(vmu, (&globalflags), AST_FLAGS_ALL);   
   if (saydurationminfo)
      vmu->saydurationm = saydurationminfo;
   if (callcontext)
      ast_copy_string(vmu->callback, callcontext, sizeof(vmu->callback));
   if (dialcontext)
      ast_copy_string(vmu->dialout, dialcontext, sizeof(vmu->dialout));
   if (exitcontext)
      ast_copy_string(vmu->exit, exitcontext, sizeof(vmu->exit));
   if (maxmsg)
      vmu->maxmsg = maxmsg;
}

static void apply_option(struct ast_vm_user *vmu, const char *var, const char *value)
{
   int x;
   if (!strcasecmp(var, "attach")) {
      ast_set2_flag(vmu, ast_true(value), VM_ATTACH); 
   } else if (!strcasecmp(var, "serveremail")) {
      ast_copy_string(vmu->serveremail, value, sizeof(vmu->serveremail));
   } else if (!strcasecmp(var, "language")) {
      ast_copy_string(vmu->language, value, sizeof(vmu->language));
   } else if (!strcasecmp(var, "tz")) {
      ast_copy_string(vmu->zonetag, value, sizeof(vmu->zonetag));
   } else if (!strcasecmp(var, "delete") || !strcasecmp(var, "deletevoicemail")) {
      ast_set2_flag(vmu, ast_true(value), VM_DELETE); 
   } else if (!strcasecmp(var, "saycid")){
      ast_set2_flag(vmu, ast_true(value), VM_SAYCID); 
   } else if (!strcasecmp(var,"sendvoicemail")){
      ast_set2_flag(vmu, ast_true(value), VM_SVMAIL); 
   } else if (!strcasecmp(var, "review")){
      ast_set2_flag(vmu, ast_true(value), VM_REVIEW); 
   } else if (!strcasecmp(var, "operator")){
      ast_set2_flag(vmu, ast_true(value), VM_OPERATOR);  
   } else if (!strcasecmp(var, "envelope")){
      ast_set2_flag(vmu, ast_true(value), VM_ENVELOPE);  
   } else if (!strcasecmp(var, "sayduration")){
      ast_set2_flag(vmu, ast_true(value), VM_SAYDURATION);  
   } else if (!strcasecmp(var, "saydurationm")){
      if (sscanf(value, "%d", &x) == 1) {
         vmu->saydurationm = x;
      } else {
         ast_log(LOG_WARNING, "Invalid min duration for say duration\n");
      }
   } else if (!strcasecmp(var, "forcename")){
      ast_set2_flag(vmu, ast_true(value), VM_FORCENAME); 
   } else if (!strcasecmp(var, "forcegreetings")){
      ast_set2_flag(vmu, ast_true(value), VM_FORCEGREET);   
   } else if (!strcasecmp(var, "callback")) {
      ast_copy_string(vmu->callback, value, sizeof(vmu->callback));
   } else if (!strcasecmp(var, "dialout")) {
      ast_copy_string(vmu->dialout, value, sizeof(vmu->dialout));
   } else if (!strcasecmp(var, "exitcontext")) {
      ast_copy_string(vmu->exit, value, sizeof(vmu->exit));
   } else if (!strcasecmp(var, "maxmsg")) {
      vmu->maxmsg = atoi(value);
      if (vmu->maxmsg <= 0) {
         ast_log(LOG_WARNING, "Invalid number of messages per folder maxmsg=%s. Using default value %i\n", value, MAXMSG);
         vmu->maxmsg = MAXMSG;
      } else if (vmu->maxmsg > MAXMSGLIMIT) {
         ast_log(LOG_WARNING, "Maximum number of messages per folder is %i. Cannot accept value maxmsg=%s\n", MAXMSGLIMIT, value);
         vmu->maxmsg = MAXMSGLIMIT;
      }
   } else if (!strcasecmp(var, "options")) {
      apply_options(vmu, value);
   }
}

static int change_password_realtime(struct ast_vm_user *vmu, const char *password)
{
   int res;
   if (!ast_strlen_zero(vmu->uniqueid)) {
      res = ast_update_realtime("voicemail", "uniqueid", vmu->uniqueid, "password", password, NULL);
      if (res > 0) {
         ast_copy_string(vmu->password, password, sizeof(vmu->password));
         res = 0;
      } else if (!res) {
         res = -1;
      }
      return res;
   }
   return -1;
}

static void apply_options(struct ast_vm_user *vmu, const char *options)
{  /* Destructively Parse options and apply */
   char *stringp;
   char *s;
   char *var, *value;
   stringp = ast_strdupa(options);
   while ((s = strsep(&stringp, "|"))) {
      value = s;
      if ((var = strsep(&value, "=")) && value) {
         apply_option(vmu, var, value);
      }
   }  
}

static struct ast_vm_user *find_user_realtime(struct ast_vm_user *ivm, const char *context, const char *mailbox)
{
   struct ast_variable *var, *tmp;
   struct ast_vm_user *retval;

   if (ivm)
      retval=ivm;
   else
      retval=malloc(sizeof(struct ast_vm_user));

   if (retval) {
      memset(retval, 0, sizeof(struct ast_vm_user));
      if (!ivm)
         ast_set_flag(retval, VM_ALLOCED);   
      if (mailbox) 
         ast_copy_string(retval->mailbox, mailbox, sizeof(retval->mailbox));
      populate_defaults(retval);
      if (!context && ast_test_flag((&globalflags), VM_SEARCH))
         var = ast_load_realtime("voicemail", "mailbox", mailbox, NULL);
      else
         var = ast_load_realtime("voicemail", "mailbox", mailbox, "context", context, NULL);
      if (var) {
         tmp = var;
         while(tmp) {
            printf("%s => %s\n", tmp->name, tmp->value);
            if (!strcasecmp(tmp->name, "password")) {
               ast_copy_string(retval->password, tmp->value, sizeof(retval->password));
            } else if (!strcasecmp(tmp->name, "uniqueid")) {
               ast_copy_string(retval->uniqueid, tmp->value, sizeof(retval->uniqueid));
            } else if (!strcasecmp(tmp->name, "pager")) {
               ast_copy_string(retval->pager, tmp->value, sizeof(retval->pager));
            } else if (!strcasecmp(tmp->name, "email")) {
               ast_copy_string(retval->email, tmp->value, sizeof(retval->email));
            } else if (!strcasecmp(tmp->name, "fullname")) {
               ast_copy_string(retval->fullname, tmp->value, sizeof(retval->fullname));
            } else if (!strcasecmp(tmp->name, "context")) {
               ast_copy_string(retval->context, tmp->value, sizeof(retval->context));
            } else
               apply_option(retval, tmp->name, tmp->value);
            tmp = tmp->next;
         } 
         ast_variables_destroy(var);
      } else { 
         if (!ivm) 
            free(retval);
         retval = NULL;
      }  
   } 
   return retval;
}

static struct ast_vm_user *find_user(struct ast_vm_user *ivm, const char *context, const char *mailbox)
{
   /* This function could be made to generate one from a database, too */
   struct ast_vm_user *vmu=NULL, *cur;
   ast_mutex_lock(&vmlock);
   cur = users;

   if (!context && !ast_test_flag((&globalflags), VM_SEARCH))
      context = "default";

   while (cur) {
      if (ast_test_flag((&globalflags), VM_SEARCH) && !strcasecmp(mailbox, cur->mailbox))
         break;
      if (context && (!strcasecmp(context, cur->context)) && (!strcasecmp(mailbox, cur->mailbox)))
         break;
      cur=cur->next;
   }
   if (cur) {
      if (ivm)
         vmu = ivm;
      else
         /* Make a copy, so that on a reload, we have no race */
         vmu = malloc(sizeof(struct ast_vm_user));
      if (vmu) {
         memcpy(vmu, cur, sizeof(struct ast_vm_user));
         ast_set2_flag(vmu, !ivm, VM_ALLOCED);  
         vmu->next = NULL;
      }
   } else
      vmu = find_user_realtime(ivm, context, mailbox);
   ast_mutex_unlock(&vmlock);
   return vmu;
}

static int reset_user_pw(const char *context, const char *mailbox, const char *newpass)
{
   /* This function could be made to generate one from a database, too */
   struct ast_vm_user *cur;
   int res = -1;
   ast_mutex_lock(&vmlock);
   cur = users;
   while (cur) {
      if ((!context || !strcasecmp(context, cur->context)) &&
         (!strcasecmp(mailbox, cur->mailbox)))
            break;
      cur=cur->next;
   }
   if (cur) {
      ast_copy_string(cur->password, newpass, sizeof(cur->password));
      res = 0;
   }
   ast_mutex_unlock(&vmlock);
   return res;
}

static void vm_change_password(struct ast_vm_user *vmu, const char *newpassword)
{
   /*  There's probably a better way of doing this. */
   /*  That's why I've put the password change in a separate function. */
   /*  This could also be done with a database function */
   
   FILE *configin;
   FILE *configout;
   int linenum=0;
   char inbuf[256];
   char orig[256];
   char currcontext[256] = "";
   char tmpin[AST_CONFIG_MAX_PATH];
   char tmpout[AST_CONFIG_MAX_PATH];
   struct stat statbuf;

   if (!change_password_realtime(vmu, newpassword))
      return;

   snprintf(tmpin, sizeof(tmpin), "%s/voicemail.conf", ast_config_AST_CONFIG_DIR);
   snprintf(tmpout, sizeof(tmpout), "%s/voicemail.conf.new", ast_config_AST_CONFIG_DIR);
   configin = fopen(tmpin,"r");
   if (configin)
      configout = fopen(tmpout,"w+");
   else
      configout = NULL;
   if (!configin || !configout) {
      if (configin)
         fclose(configin);
      else
         ast_log(LOG_WARNING, "Warning: Unable to open '%s' for reading: %s\n", tmpin, strerror(errno));
      if (configout)
         fclose(configout);
      else
         ast_log(LOG_WARNING, "Warning: Unable to open '%s' for writing: %s\n", tmpout, strerror(errno));
         return;
   }

   while (!feof(configin)) {
      char *user = NULL, *pass = NULL, *rest = NULL, *comment = NULL, *tmpctx = NULL, *tmpctxend = NULL;

      /* Read in the line */
      if (fgets(inbuf, sizeof(inbuf), configin) == NULL)
         continue;
      linenum++;

      /* Make a backup of it */
      ast_copy_string(orig, inbuf, sizeof(orig));

      /*
        Read the file line by line, split each line into a comment and command section
        only parse the command portion of the line
      */
      if (inbuf[strlen(inbuf) - 1] == '\n')
         inbuf[strlen(inbuf) - 1] = '\0';

      if ((comment = strchr(inbuf, ';')))
         *comment++ = '\0'; /* Now inbuf is terminated just before the comment */

      if (ast_strlen_zero(inbuf)) {
         fprintf(configout, "%s", orig);
         continue;
      }

      /* Check for a context, first '[' to first ']' */
      if ((tmpctx = strchr(inbuf, '['))) {
         tmpctxend = strchr(tmpctx, ']');
         if (tmpctxend) {
            /* Valid context */
            ast_copy_string(currcontext, tmpctx + 1, tmpctxend - tmpctx);
            fprintf(configout, "%s", orig);
            continue;
         }
      }

      /* This isn't a context line, check for MBX => PSWD... */
      user = inbuf;
      if ((pass = strchr(user, '='))) {
         /* We have a line in the form of aaaaa=aaaaaa */
         *pass++ = '\0';

         user = ast_strip(user);

         if (*pass == '>')
            *pass++ = '\0';

         pass = ast_skip_blanks(pass);

         /* 
            Since no whitespace allowed in fields, or more correctly white space
            inside the fields is there for a purpose, we can just terminate pass
            at the comma or EOL whichever comes first.
         */
         if ((rest = strchr(pass, ',')))
            *rest++ = '\0';
      } else {
         user = NULL;
      }        

      /* Compare user, pass AND context */
      if (!ast_strlen_zero(user) && !strcmp(user, vmu->mailbox) &&
          !ast_strlen_zero(pass) && !strcmp(pass, vmu->password) &&
          !strcasecmp(currcontext, vmu->context)) {
         /* This is the line */
         if (rest) {
            fprintf(configout, "%s => %s,%s", user, newpassword, rest);
         } else {
            fprintf(configout, "%s => %s", user, newpassword);
         }
         /* If there was a comment on the line print it out */
         if (comment) {
            fprintf(configout, ";%s\n", comment);
         } else {
            fprintf(configout, "\n");
         }
      } else {
         /* Put it back like it was */
         fprintf(configout, "%s", orig);
      }
   }
   fclose(configin);
   fclose(configout);

   stat(tmpin, &statbuf);
   chmod(tmpout, statbuf.st_mode);
   chown(tmpout, statbuf.st_uid, statbuf.st_gid);
   unlink(tmpin);
   rename(tmpout, tmpin);
   reset_user_pw(vmu->context, vmu->mailbox, newpassword);
   ast_copy_string(vmu->password, newpassword, sizeof(vmu->password));
}

static void vm_change_password_shell(struct ast_vm_user *vmu, char *newpassword)
{
   char buf[255];
   snprintf(buf,255,"%s %s %s %s",ext_pass_cmd,vmu->context,vmu->mailbox,newpassword);
   if (!ast_safe_system(buf)) {
      reset_user_pw(vmu->context, vmu->mailbox, newpassword);
      ast_copy_string(vmu->password, newpassword, sizeof(vmu->password));
   }
}

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

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

/** basically mkdir -p $dest/$context/$ext/$mailbox
 * @dest    String. base directory.
 * @context String. Ignored if is null or empty string.
 * @ext     String. Ignored if is null or empty string.
 * @mailbox String. Ignored if is null or empty string. 
 * @returns -1 on failure, 0 on success.
 * */
static int create_dirpath(char *dest, int len, char *context, char *ext, char *mailbox)
{
   mode_t   mode = VOICEMAIL_DIR_MODE;

   if(context && context[0] != '\0') {
      make_dir(dest, len, context, "", "");
      if(mkdir(dest, mode) && errno != EEXIST) {
         ast_log(LOG_WARNING, "mkdir '%s' failed: %s\n", dest, strerror(errno));
         return -1;
      }
   }
   if(ext && ext[0] != '\0') {
      make_dir(dest, len, context, ext, "");
      if(mkdir(dest, mode) && errno != EEXIST) {
         ast_log(LOG_WARNING, "mkdir '%s' failed: %s\n", dest, strerror(errno));
         return -1;
      }
   }
   if(mailbox && mailbox[0] != '\0') {
      make_dir(dest, len, context, ext, mailbox);
      if(mkdir(dest, mode) && errno != EEXIST) {
         ast_log(LOG_WARNING, "mkdir '%s' failed: %s\n", dest, strerror(errno));
         return -1;
      }
   }
   return 0;
}

/* only return failure if ast_lock_path returns 'timeout',
   not if the path does not exist or any other reason
*/
static int vm_lock_path(const char *path)
{
   switch (ast_lock_path(path)) {
   case AST_LOCK_TIMEOUT:
      return -1;
   default:
      return 0;
   }
}


#ifdef USE_ODBC_STORAGE
static int retrieve_file(char *dir, int msgnum)
{
   int x = 0;
   int res;
   int fd=-1;
   size_t fdlen = 0;
   void *fdm = MAP_FAILED;
   SQLSMALLINT colcount=0;
   SQLHSTMT stmt;
   char sql[PATH_MAX];
   char fmt[80]="";
   char *c;
   char coltitle[256];
   SQLSMALLINT collen;
   SQLSMALLINT datatype;
   SQLSMALLINT decimaldigits;
   SQLSMALLINT nullable;
   SQLULEN colsize;
   FILE *f=NULL;
   char rowdata[80];
   char fn[PATH_MAX];
   char full_fn[PATH_MAX];
   char msgnums[80];
   
   odbc_obj *obj;
   obj = fetch_odbc_obj(odbc_database, 0);
   if (obj) {
      ast_copy_string(fmt, vmfmts, sizeof(fmt));
      c = strchr(fmt, '|');
      if (c)
         *c = '\0';
      if (!strcasecmp(fmt, "wav49"))
         strcpy(fmt, "WAV");
      snprintf(msgnums, sizeof(msgnums),"%d", msgnum);
      if (msgnum > -1)
         make_file(fn, sizeof(fn), dir, msgnum);
      else
         ast_copy_string(fn, dir, sizeof(fn));
      snprintf(full_fn, sizeof(full_fn), "%s.txt", fn);
      
      if (!(f = fopen(full_fn, "w+"))) {
              ast_log(LOG_WARNING, "Failed to open/create '%s'\n", full_fn);
              goto yuck;
      }
      
      snprintf(full_fn, sizeof(full_fn), "%s.%s", fn, fmt);
      res = SQLAllocHandle(SQL_HANDLE_STMT, obj->con, &stmt);
      if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
         ast_log(LOG_WARNING, "SQL Alloc Handle failed!\n");
         goto yuck;
      }
      snprintf(sql, sizeof(sql), "SELECT * FROM %s WHERE dir=? AND msgnum=?",odbc_table);
      res = SQLPrepare(stmt, sql, SQL_NTS);
      if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
         ast_log(LOG_WARNING, "SQL Prepare failed![%s]\n", sql);
         SQLFreeHandle (SQL_HANDLE_STMT, stmt);
         goto yuck;
      }
      SQLBindParameter(stmt, 1, SQL_PARAM_INPUT, SQL_C_CHAR, SQL_CHAR, strlen(dir), 0, (void *)dir, 0, NULL);
      SQLBindParameter(stmt, 2, SQL_PARAM_INPUT, SQL_C_CHAR, SQL_CHAR, strlen(msgnums), 0, (void *)msgnums, 0, NULL);
      res = odbc_smart_execute(obj, stmt);