Nico Golde:

[apps/madmutt.git] / init.c

/*
 * Copyright (C) 1996-2002 Michael R. Elkins <me@mutt.org>
 * 
 *     This program is free software; you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation; either version 2 of the License, or
 *     (at your option) any later version.
 * 
 *     This program is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU General Public License for more details.
 * 
 *     You should have received a copy of the GNU General Public License
 *     along with this program; if not, write to the Free Software
 *     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 */ 

#if HAVE_CONFIG_H
# include "config.h"
#endif

#include "mutt.h"
#include "mapping.h"
#include "mutt_curses.h"
#include "mutt_regex.h"
#include "history.h"
#include "keymap.h"
#include "mbyte.h"
#include "charset.h"
#include "mutt_crypt.h"
#include "mutt_idna.h"

#if defined(USE_SSL) || defined(USE_NSS) || defined(USE_GNUTLS)
#include "mutt_ssl.h"
#endif



#include "mx.h"
#include "init.h"
#include "mailbox.h"

#include <ctype.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/utsname.h>
#include <errno.h>
#include <sys/wait.h>

void toggle_quadoption (int opt)
{
  int n = opt/4;
  int b = (opt % 4) * 2;

  QuadOptions[n] ^= (1 << b);
}

void set_quadoption (int opt, int flag)
{
  int n = opt/4;
  int b = (opt % 4) * 2;

  QuadOptions[n] &= ~(0x3 << b);
  QuadOptions[n] |= (flag & 0x3) << b;
}

int quadoption (int opt)
{
  int n = opt/4;
  int b = (opt % 4) * 2;

  return (QuadOptions[n] >> b) & 0x3;
}

int query_quadoption (int opt, const char *prompt)
{
  int v = quadoption (opt);

  switch (v)
  {
    case M_YES:
    case M_NO:
      return (v);

    default:
      v = mutt_yesorno (prompt, (v == M_ASKYES));
      CLEARLINE (LINES - 1);
      return (v);
  }

  /* not reached */
}

/* given the variable ``s'', return the index into the rc_vars array which
   matches, or -1 if the variable is not found.  */
int mutt_option_index (char *s)
{
  int i;

  for (i = 0; MuttVars[i].option; i++)
    if (mutt_strcmp (s, MuttVars[i].option) == 0)
      return (MuttVars[i].type == DT_SYN ?  mutt_option_index ((char *) MuttVars[i].data) : i);
  return (-1);
}

int mutt_extract_token (BUFFER *dest, BUFFER *tok, int flags)
{
  char          ch;
  char          qc = 0; /* quote char */
  char          *pc;

  /* reset the destination pointer to the beginning of the buffer */
  dest->dptr = dest->data;

  SKIPWS (tok->dptr);
  while ((ch = *tok->dptr))
  {
    if (!qc)
    {
      if ((ISSPACE (ch) && !(flags & M_TOKEN_SPACE)) ||
          (ch == '#' && !(flags & M_TOKEN_COMMENT)) ||
          (ch == '=' && (flags & M_TOKEN_EQUAL)) ||
          (ch == ';' && !(flags & M_TOKEN_SEMICOLON)) ||
          ((flags & M_TOKEN_PATTERN) && strchr ("~!|", ch)))
        break;
    }

    tok->dptr++;

    if (ch == qc)
      qc = 0; /* end of quote */
    else if (!qc && (ch == '\'' || ch == '"') && !(flags & M_TOKEN_QUOTE))
      qc = ch;
    else if (ch == '\\' && qc != '\'')
    {
        if (!*tok->dptr)
            return -1; /* premature end of token */
      switch (ch = *tok->dptr++)
      {
        case 'c':
        case 'C':
            if (!*tok->dptr)
                return -1; /* premature end of token */
          mutt_buffer_addch (dest, (toupper ((unsigned char) *tok->dptr)
                                    - '@') & 0x7f);
          tok->dptr++;
          break;
        case 'r':
          mutt_buffer_addch (dest, '\r');
          break;
        case 'n':
          mutt_buffer_addch (dest, '\n');
          break;
        case 't':
          mutt_buffer_addch (dest, '\t');
          break;
        case 'f':
          mutt_buffer_addch (dest, '\f');
          break;
        case 'e':
          mutt_buffer_addch (dest, '\033');
          break;
        default:
          if (isdigit ((unsigned char) ch) &&
              isdigit ((unsigned char) *tok->dptr) &&
              isdigit ((unsigned char) *(tok->dptr + 1)))
          {

            mutt_buffer_addch (dest, (ch << 6) + (*tok->dptr << 3) + *(tok->dptr + 1) - 3504);
            tok->dptr += 2;
          }
          else
            mutt_buffer_addch (dest, ch);
      }
    }
    else if (ch == '^' && (flags & M_TOKEN_CONDENSE))
    {
        if (!*tok->dptr)
            return -1; /* premature end of token */
      ch = *tok->dptr++;
      if (ch == '^')
        mutt_buffer_addch (dest, ch);
      else if (ch == '[')
        mutt_buffer_addch (dest, '\033');
      else if (isalpha ((unsigned char) ch))
        mutt_buffer_addch (dest, toupper ((unsigned char) ch) - '@');
      else
      {
        mutt_buffer_addch (dest, '^');
        mutt_buffer_addch (dest, ch);
      }
    }
    else if (ch == '`' && (!qc || qc == '"'))
    {
      FILE      *fp;
      pid_t     pid;
      char      *cmd, *ptr;
      size_t    expnlen;
      BUFFER    expn;
      int       line = 0;

      pc = tok->dptr;
      do {
        if ((pc = strpbrk (pc, "\\`")))
        {
          /* skip any quoted chars */
          if (*pc == '\\')
            pc += 2;
        }
      } while (pc && *pc != '`');
      if (!pc)
      {
        dprint (1, (debugfile, "mutt_get_token: mismatched backtics\n"));
        return (-1);
      }
      cmd = mutt_substrdup (tok->dptr, pc);
      if ((pid = mutt_create_filter (cmd, NULL, &fp, NULL)) < 0)
      {
        dprint (1, (debugfile, "mutt_get_token: unable to fork command: %s", cmd));
        FREE (&cmd);
        return (-1);
      }
      FREE (&cmd);

      tok->dptr = pc + 1;

      /* read line */
      memset (&expn, 0, sizeof (expn));
      expn.data = mutt_read_line (NULL, &expn.dsize, fp, &line);
      fclose (fp);
      mutt_wait_filter (pid);

      /* if we got output, make a new string consiting of the shell ouptput
         plus whatever else was left on the original line */
      /* BUT: If this is inside a quoted string, directly add output to 
       * the token */
      if (expn.data && qc)
      {
        mutt_buffer_addstr (dest, expn.data);
        FREE (&expn.data);
      }
      else if (expn.data)
      {
        expnlen = mutt_strlen (expn.data);
        tok->dsize = expnlen + mutt_strlen (tok->dptr) + 1;
        ptr = safe_malloc (tok->dsize);
        memcpy (ptr, expn.data, expnlen);
        strcpy (ptr + expnlen, tok->dptr);      /* __STRCPY_CHECKED__ */
        if (tok->destroy)
          FREE (&tok->data);
        tok->data = ptr;
        tok->dptr = ptr;
        tok->destroy = 1; /* mark that the caller should destroy this data */
        ptr = NULL;
        FREE (&expn.data);
      }
    }
    else if (ch == '$' && (!qc || qc == '"') && (*tok->dptr == '{' || isalpha ((unsigned char) *tok->dptr)))
    {
      char *env = NULL, *var = NULL;

      if (*tok->dptr == '{')
      {
        tok->dptr++;
        if ((pc = strchr (tok->dptr, '}')))
        {
          var = mutt_substrdup (tok->dptr, pc);
          tok->dptr = pc + 1;
        }
      }
      else
      {
        for (pc = tok->dptr; isalpha ((unsigned char) *pc) || *pc == '_'; pc++)
          ;
        var = mutt_substrdup (tok->dptr, pc);
        tok->dptr = pc;
      }
      if (var && (env = getenv (var)))
        mutt_buffer_addstr (dest, env);
      FREE (&var);
    }
    else
      mutt_buffer_addch (dest, ch);
  }
  mutt_buffer_addch (dest, 0); /* terminate the string */
  SKIPWS (tok->dptr);
  return 0;
}

static void add_to_list (LIST **list, const char *str)
{
  LIST *t, *last = NULL;

  /* don't add a NULL or empty string to the list */
  if (!str || *str == '\0')
    return;

  /* check to make sure the item is not already on this list */
  for (last = *list; last; last = last->next)
  {
    if (ascii_strcasecmp (str, last->data) == 0)
    {
      /* already on the list, so just ignore it */
      last = NULL;
      break;
    }
    if (!last->next)
      break;
  }

  if (!*list || last)
  {
    t = (LIST *) safe_calloc (1, sizeof (LIST));
    t->data = safe_strdup (str);
    if (last)
    {
      last->next = t;
      last = last->next;
    }
    else
      *list = last = t;
  }
}

static int add_to_rx_list (RX_LIST **list, const char *s, int flags, BUFFER *err)
{
  RX_LIST *t, *last = NULL;
  REGEXP *rx;

  if (!s || !*s)
    return 0;

  if (!(rx = mutt_compile_regexp (s, flags)))
  {
    snprintf (err->data, err->dsize, "Bad regexp: %s\n", s);
    return -1;
  }

  /* check to make sure the item is not already on this list */
  for (last = *list; last; last = last->next)
  {
    if (ascii_strcasecmp (rx->pattern, last->rx->pattern) == 0)
    {
      /* already on the list, so just ignore it */
      last = NULL;
      break;
    }
    if (!last->next)
      break;
  }

  if (!*list || last)
  {
    t = mutt_new_rx_list();
    t->rx = rx;
    if (last)
    {
      last->next = t;
      last = last->next;
    }
    else
      *list = last = t;
  }
  else /* duplicate */
    mutt_free_regexp (&rx);

  return 0;
}

static int add_to_spam_list (SPAM_LIST **list, const char *pat, const char *templ, BUFFER *err)
{
  SPAM_LIST *t = NULL, *last = NULL;
  REGEXP *rx;
  int n;
  const char *p;

  if (!pat || !*pat || !templ)
    return 0;

  if (!(rx = mutt_compile_regexp (pat, REG_ICASE)))
  {
    snprintf (err->data, err->dsize, _("Bad regexp: %s"), pat);
    return -1;
  }

  /* check to make sure the item is not already on this list */
  for (last = *list; last; last = last->next)
  {
    if (ascii_strcasecmp (rx->pattern, last->rx->pattern) == 0)
    {
      /* Already on the list. Formerly we just skipped this case, but
       * now we're supporting removals, which means we're supporting
       * re-adds conceptually. So we probably want this to imply a
       * removal, then do an add. We can achieve the removal by freeing
       * the template, and leaving t pointed at the current item.
       */
      t = last;
      safe_free(&t->template);
      break;
    }
    if (!last->next)
      break;
  }

  /* If t is set, it's pointing into an extant SPAM_LIST* that we want to
   * update. Otherwise we want to make a new one to link at the list's end.
   */
  if (!t)
  {
    t = mutt_new_spam_list();
    t->rx = rx;
    if (last)
      last->next = t;
    else
      *list = t;
  }

  /* Now t is the SPAM_LIST* that we want to modify. It is prepared. */
  t->template = safe_strdup(templ);

  /* Find highest match number in template string */
  t->nmatch = 0;
  for (p = templ; *p;)
  {
    if (*p == '%')
    {
        n = atoi(++p);
        if (n > t->nmatch)
          t->nmatch = n;
        while (*p && isdigit((int)*p))
          ++p;
    }
    else
        ++p;
  }
  t->nmatch++;          /* match 0 is always the whole expr */

  return 0;
}

static int remove_from_spam_list (SPAM_LIST **list, const char *pat)
{
  SPAM_LIST *spam, *prev;
  int nremoved = 0;

  /* Being first is a special case. */
  spam = *list;
  if (spam->rx && !mutt_strcmp(spam->rx->pattern, pat))
  {
    *list = spam->next;
    mutt_free_regexp(&spam->rx);
    safe_free(&spam->template);
    safe_free(&spam);
    return 1;
  }

  prev = spam;
  for (spam = prev->next; spam;)
  {
    if (!mutt_strcmp(spam->rx->pattern, pat))
    {
      prev->next = spam->next;
      mutt_free_regexp(&spam->rx);
      safe_free(&spam->template);
      safe_free(&spam);
      spam = prev->next;
      ++nremoved;
    }
    else
      spam = spam->next;
  }

  return nremoved;
}


static void remove_from_list (LIST **l, const char *str)
{
  LIST *p, *last = NULL;

  if (mutt_strcmp ("*", str) == 0)
    mutt_free_list (l);    /* ``unCMD *'' means delete all current entries */
  else
  {
    p = *l;
    last = NULL;
    while (p)
    {
      if (ascii_strcasecmp (str, p->data) == 0)
      {
        FREE (&p->data);
        if (last)
          last->next = p->next;
        else
          (*l) = p->next;
        FREE (&p);
      }
      else
      {
        last = p;
        p = p->next;
      }
    }
  }
}

static int remove_from_rx_list (RX_LIST **l, const char *str)
{
  RX_LIST *p, *last = NULL;
  int rv = -1;

  if (mutt_strcmp ("*", str) == 0)
  {
    mutt_free_rx_list (l);    /* ``unCMD *'' means delete all current entries */
    rv = 0;
  }
  else
  {
    p = *l;
    last = NULL;
    while (p)
    {
      if (ascii_strcasecmp (str, p->rx->pattern) == 0)
      {
        mutt_free_regexp (&p->rx);
        if (last)
          last->next = p->next;
        else
          (*l) = p->next;
        FREE (&p);
        rv = 0;
      }
      else
      {
        last = p;
        p = p->next;
      }
    }
  }
  return (rv);
}

static int parse_unignore (BUFFER *buf, BUFFER *s, unsigned long data, BUFFER *err)
{
  do
  {
    mutt_extract_token (buf, s, 0);

    /* don't add "*" to the unignore list */
    if (strcmp (buf->data, "*")) 
      add_to_list (&UnIgnore, buf->data);

    remove_from_list (&Ignore, buf->data);
  }
  while (MoreArgs (s));

  return 0;
}

static int parse_ignore (BUFFER *buf, BUFFER *s, unsigned long data, BUFFER *err)
{
  do
  {
    mutt_extract_token (buf, s, 0);
    remove_from_list (&UnIgnore, buf->data);
    add_to_list (&Ignore, buf->data);
  }
  while (MoreArgs (s));

  return 0;
}

static int parse_list (BUFFER *buf, BUFFER *s, unsigned long data, BUFFER *err)
{
  do
  {
    mutt_extract_token (buf, s, 0);
    add_to_list ((LIST **) data, buf->data);
  }
  while (MoreArgs (s));

  return 0;
}

static int _parse_rx_list (BUFFER *buf, BUFFER *s, unsigned long data, BUFFER *err, int flags)
{
  do 
  {
    mutt_extract_token (buf, s, 0);
    if (add_to_rx_list ((RX_LIST **) data, buf->data, flags, err) != 0)
      return -1;
        
  }
  while (MoreArgs (s));
  
  return 0;
}

static int parse_rx_list (BUFFER *buf, BUFFER *s, unsigned long data, BUFFER *err)
{
  return _parse_rx_list (buf, s, data, err, REG_ICASE);
}

static int parse_rx_unlist (BUFFER *buf, BUFFER *s, unsigned long data, BUFFER *err)
{
  do
  {
    mutt_extract_token (buf, s, 0);
    if (mutt_strcmp (buf->data, "*") == 0)
    {
      mutt_free_rx_list ((RX_LIST **) data);
      break;
    }
    remove_from_rx_list ((RX_LIST **) data, buf->data);
  }
  while (MoreArgs (s));
  
  return 0;
}

static void _alternates_clean (void)
{
  int i;
  if (Context && Context->msgcount) 
  {
    for (i = 0; i < Context->msgcount; i++)
      Context->hdrs[i]->recip_valid = 0;
  }
}

static int parse_alternates (BUFFER *buf, BUFFER *s, unsigned long data, BUFFER *err)
{
  _alternates_clean();
  do
  {
    mutt_extract_token (buf, s, 0);
    remove_from_rx_list (&UnAlternates, buf->data);

    if (add_to_rx_list (&Alternates, buf->data, REG_ICASE, err) != 0)
      return -1;
  }
  while (MoreArgs (s));

  return 0;
}

static int parse_unalternates (BUFFER *buf, BUFFER *s, unsigned long data, BUFFER *err)
{
  _alternates_clean();
  do
  {
    mutt_extract_token (buf, s, 0);
    remove_from_rx_list (&Alternates, buf->data);

    if (mutt_strcmp (buf->data, "*") &&
        add_to_rx_list (&UnAlternates, buf->data, REG_ICASE, err) != 0)
      return -1;

  }
  while (MoreArgs (s));

  return 0;
}

static int parse_spam_list (BUFFER *buf, BUFFER *s, unsigned long data, BUFFER *err)
{
  BUFFER templ;

  memset(&templ, 0, sizeof(templ));

  /* Insist on at least one parameter */
  if (!MoreArgs(s))
  {
    if (data == M_SPAM)
      strfcpy(err->data, _("spam: no matching pattern"), err->dsize);
    else
      strfcpy(err->data, _("nospam: no matching pattern"), err->dsize);
    return -1;
  }

  /* Extract the first token, a regexp */
  mutt_extract_token (buf, s, 0);

  /* data should be either M_SPAM or M_NOSPAM. M_SPAM is for spam commands. */
  if (data == M_SPAM)
  {
    /* If there's a second parameter, it's a template for the spam tag. */
    if (MoreArgs(s))
    {
      mutt_extract_token (&templ, s, 0);

      /* Add to the spam list. */
      if (add_to_spam_list (&SpamList, buf->data, templ.data, err) != 0) {
          FREE(&templ.data);
          return -1;
      }
      FREE(&templ.data);
    }

    /* If not, try to remove from the nospam list. */
    else
    {
      remove_from_rx_list(&NoSpamList, buf->data);
    }

    return 0;
  }

  /* M_NOSPAM is for nospam commands. */
  else if (data == M_NOSPAM)
  {
    /* nospam only ever has one parameter. */

    /* "*" is a special case. */
    if (!mutt_strcmp(buf->data, "*"))
    {
      mutt_free_spam_list (&SpamList);
      mutt_free_rx_list (&NoSpamList);
      return 0;
    }

    /* If it's on the spam list, just remove it. */
    if (remove_from_spam_list(&SpamList, buf->data) != 0)
      return 0;

    /* Otherwise, add it to the nospam list. */
    if (add_to_rx_list (&NoSpamList, buf->data, REG_ICASE, err) != 0)
      return -1;

    return 0;
  }

  /* This should not happen. */
  strfcpy(err->data, "This is no good at all.", err->dsize);
  return -1;
}

static int parse_unlist (BUFFER *buf, BUFFER *s, unsigned long data, BUFFER *err)
{
  do
  {
    mutt_extract_token (buf, s, 0);
    /*
     * Check for deletion of entire list
     */
    if (mutt_strcmp (buf->data, "*") == 0)
    {
      mutt_free_list ((LIST **) data);
      break;
    }
    remove_from_list ((LIST **) data, buf->data);
  }
  while (MoreArgs (s));

  return 0;
}

static int parse_lists (BUFFER *buf, BUFFER *s, unsigned long data, BUFFER *err)
{
  do
  {
    mutt_extract_token (buf, s, 0);
    remove_from_rx_list (&UnMailLists, buf->data);
    
    if (add_to_rx_list (&MailLists, buf->data, REG_ICASE, err) != 0)
      return -1;
  }
  while (MoreArgs (s));

  return 0;
}

static int parse_unlists (BUFFER *buf, BUFFER *s, unsigned long data, BUFFER *err)
{
  do
  {
    mutt_extract_token (buf, s, 0);
    remove_from_rx_list (&SubscribedLists, buf->data);
    remove_from_rx_list (&MailLists, buf->data);
    
    if (mutt_strcmp (buf->data, "*") && 
        add_to_rx_list (&UnMailLists, buf->data, REG_ICASE, err) != 0)
      return -1;
  }
  while (MoreArgs (s));

  return 0;
}

static int parse_subscribe (BUFFER *buf, BUFFER *s, unsigned long data, BUFFER *err)
{
  do
  {
    mutt_extract_token (buf, s, 0);
    remove_from_rx_list (&UnMailLists, buf->data);
    remove_from_rx_list (&UnSubscribedLists, buf->data);

    if (add_to_rx_list (&MailLists, buf->data, REG_ICASE, err) != 0)
      return -1;
    if (add_to_rx_list (&SubscribedLists, buf->data, REG_ICASE, err) != 0)
      return -1;
  }
  while (MoreArgs (s));

  return 0;
}

static int parse_unsubscribe (BUFFER *buf, BUFFER *s, unsigned long data, BUFFER *err)
{
  do
  {
    mutt_extract_token (buf, s, 0);
    remove_from_rx_list (&SubscribedLists, buf->data);
    
    if (mutt_strcmp (buf->data, "*") &&
        add_to_rx_list (&UnSubscribedLists, buf->data, REG_ICASE, err) != 0)
      return -1;
  }
  while (MoreArgs (s));

  return 0;
}
  
static int parse_unalias (BUFFER *buf, BUFFER *s, unsigned long data, BUFFER *err)
{
  ALIAS *tmp, *last = NULL;

  do
  {
    mutt_extract_token (buf, s, 0);

    if (mutt_strcmp ("*", buf->data) == 0)
    {
      if (CurrentMenu == MENU_ALIAS)
      {
        for (tmp = Aliases; tmp ; tmp = tmp->next)
          tmp->del = 1;
        set_option (OPTFORCEREDRAWINDEX);
      }
      else
        mutt_free_alias (&Aliases);
      break;
    }
    else
      for (tmp = Aliases; tmp; tmp = tmp->next)
      {
        if (mutt_strcasecmp (buf->data, tmp->name) == 0)
        {
          if (CurrentMenu == MENU_ALIAS)
          {
            tmp->del = 1;
            set_option (OPTFORCEREDRAWINDEX);
            break;
          }

          if (last)
            last->next = tmp->next;
          else
            Aliases = tmp->next;
          tmp->next = NULL;
          mutt_free_alias (&tmp);
          break;
        }
        last = tmp;
      }
  }
  while (MoreArgs (s));
  return 0;
}

static int parse_alias (BUFFER *buf, BUFFER *s, unsigned long data, BUFFER *err)
{
  ALIAS *tmp = Aliases;
  ALIAS *last = NULL;
  char *estr = NULL;
  
  if (!MoreArgs (s))
  {
    strfcpy (err->data, _("alias: no address"), err->dsize);
    return (-1);
  }

  mutt_extract_token (buf, s, 0);

  dprint (2, (debugfile, "parse_alias: First token is '%s'.\n",
              buf->data));

  /* check to see if an alias with this name already exists */
  for (; tmp; tmp = tmp->next)
  {
    if (!mutt_strcasecmp (tmp->name, buf->data))
      break;
    last = tmp;
  }

  if (!tmp)
  {
    /* create a new alias */
    tmp = (ALIAS *) safe_calloc (1, sizeof (ALIAS));
    tmp->self = tmp;
    tmp->name = safe_strdup (buf->data);
    /* give the main addressbook code a chance */
    if (CurrentMenu == MENU_ALIAS)
      set_option (OPTMENUCALLER);
  }
  else
  {
    /* override the previous value */
    rfc822_free_address (&tmp->addr);
    if (CurrentMenu == MENU_ALIAS)
      set_option (OPTFORCEREDRAWINDEX);
  }

  mutt_extract_token (buf, s, M_TOKEN_QUOTE | M_TOKEN_SPACE | M_TOKEN_SEMICOLON);
  dprint (2, (debugfile, "parse_alias: Second token is '%s'.\n",
              buf->data));
  tmp->addr = mutt_parse_adrlist (tmp->addr, buf->data);
  if (last)
    last->next = tmp;
  else
    Aliases = tmp;
  if (mutt_addrlist_to_idna (tmp->addr, &estr))
  {
    snprintf (err->data, err->dsize, _("Warning: Bad IDN '%s' in alias '%s'.\n"),
              estr, tmp->name);
    return -1;
  }
#ifdef DEBUG
  if (debuglevel >= 2) 
  {
    ADDRESS *a;
    for (a = tmp->addr; a; a = a->next)
    {
      if (!a->group)
        dprint (2, (debugfile, "parse_alias:   %s\n",
                    a->mailbox));
      else
        dprint (2, (debugfile, "parse_alias:   Group %s\n",
                    a->mailbox));
    }
  }
#endif
  return 0;
}

static int
parse_unmy_hdr (BUFFER *buf, BUFFER *s, unsigned long data, BUFFER *err)
{
  LIST *last = NULL;
  LIST *tmp = UserHeader;
  LIST *ptr;
  size_t l;

  do
  {
    mutt_extract_token (buf, s, 0);
    if (mutt_strcmp ("*", buf->data) == 0)
      mutt_free_list (&UserHeader);
    else
    {
      tmp = UserHeader;
      last = NULL;

      l = mutt_strlen (buf->data);
      if (buf->data[l - 1] == ':')
        l--;

      while (tmp)
      {
        if (ascii_strncasecmp (buf->data, tmp->data, l) == 0 && tmp->data[l] == ':')
        {
          ptr = tmp;
          if (last)
            last->next = tmp->next;
          else
            UserHeader = tmp->next;
          tmp = tmp->next;
          ptr->next = NULL;
          mutt_free_list (&ptr);
        }
        else
        {
          last = tmp;
          tmp = tmp->next;
        }
      }
    }
  }
  while (MoreArgs (s));
  return 0;
}

static int parse_my_hdr (BUFFER *buf, BUFFER *s, unsigned long data, BUFFER *err)
{
  LIST *tmp;
  size_t keylen;
  char *p;

  mutt_extract_token (buf, s, M_TOKEN_SPACE | M_TOKEN_QUOTE);
  if ((p = strpbrk (buf->data, ": \t")) == NULL || *p != ':')
  {
    strfcpy (err->data, _("invalid header field"), err->dsize);
    return (-1);
  }
  keylen = p - buf->data + 1;

  if (UserHeader)
  {
    for (tmp = UserHeader; ; tmp = tmp->next)
    {
      /* see if there is already a field by this name */
      if (ascii_strncasecmp (buf->data, tmp->data, keylen) == 0)
      {
        /* replace the old value */
        FREE (&tmp->data);
        tmp->data = buf->data;
        memset (buf, 0, sizeof (BUFFER));
        return 0;
      }
      if (!tmp->next)
        break;
    }
    tmp->next = mutt_new_list ();
    tmp = tmp->next;
  }
  else
  {
    tmp = mutt_new_list ();
    UserHeader = tmp;
  }
  tmp->data = buf->data;
  memset (buf, 0, sizeof (BUFFER));
  return 0;
}

static int
parse_sort (short *val, const char *s, const struct mapping_t *map, BUFFER *err)
{
  int i, flags = 0;

  if (mutt_strncmp ("reverse-", s, 8) == 0)
  {
    s += 8;
    flags = SORT_REVERSE;
  }
  
  if (mutt_strncmp ("last-", s, 5) == 0)
  {
    s += 5;
    flags |= SORT_LAST;
  }

  if ((i = mutt_getvaluebyname (s, map)) == -1)
  {
    snprintf (err->data, err->dsize, _("%s: unknown sorting method"), s);
    return (-1);
  }

  *val = i | flags;

  return 0;
}

static void mutt_set_default (struct option_t *p)
{
  switch (p->type & DT_MASK)
  {
    case DT_STR:
      if (!p->init && *((char **) p->data))
        p->init = (unsigned long) safe_strdup (* ((char **) p->data));
      break;
    case DT_PATH:
      if (!p->init && *((char **) p->data))
      {
        char *cp = safe_strdup (*((char **) p->data));
        /* mutt_pretty_mailbox (cp); */
        p->init = (unsigned long) cp;
      }
      break;
    case DT_ADDR:
      if (!p->init && *((ADDRESS **) p->data))
      {
        char tmp[HUGE_STRING];
        *tmp = '\0';
        rfc822_write_address (tmp, sizeof (tmp), *((ADDRESS **) p->data), 0);
        p->init = (unsigned long) safe_strdup (tmp);
      }
      break;
    case DT_RX:
    {
      REGEXP *pp = (REGEXP *) p->data;
      if (!p->init && pp->pattern)
        p->init = (unsigned long) safe_strdup (pp->pattern);
      break;
    }
  }
}

static void mutt_restore_default (struct option_t *p)
{
  switch (p->type & DT_MASK)
  {
    case DT_STR:
      if (p->init)
        mutt_str_replace ((char **) p->data, (char *) p->init); 
      break;
    case DT_PATH:
      if (p->init)
      {
        char path[_POSIX_PATH_MAX];

        strfcpy (path, (char *) p->init, sizeof (path));
        mutt_expand_path (path, sizeof (path));
        mutt_str_replace ((char **) p->data, path);
      }
      break;
    case DT_ADDR:
      if (p->init)
      {
        rfc822_free_address ((ADDRESS **) p->data);
        *((ADDRESS **) p->data) = rfc822_parse_adrlist (NULL, (char *) p->init);
      }
      break;
    case DT_BOOL:
      if (p->init)
        set_option (p->data);
      else
        unset_option (p->data);
      break;
    case DT_QUAD:
      set_quadoption (p->data, p->init);
      break;
    case DT_NUM:
    case DT_SORT:
    case DT_MAGIC:
      *((short *) p->data) = p->init;
      break;
    case DT_RX:
      {
        REGEXP *pp = (REGEXP *) p->data;
        int flags = 0;

        FREE (&pp->pattern);
        if (pp->rx)
        {
          regfree (pp->rx);
          FREE (&pp->rx);
        }

        if (p->init)
        {
          char *s = (char *) p->init;

          pp->rx = safe_calloc (1, sizeof (regex_t));
          if (mutt_strcmp (p->option, "mask") != 0)
            flags |= mutt_which_case ((const char *) p->init);
          if (mutt_strcmp (p->option, "mask") == 0 && *s == '!')
          {
            s++;
            pp->not = 1;
          }
          if (REGCOMP (pp->rx, s, flags) != 0)
          {
            fprintf (stderr, _("mutt_restore_default(%s): error in regexp: %s\n"),
                     p->option, pp->pattern);
            FREE (&pp->pattern);
            regfree (pp->rx);
            FREE (&pp->rx);
          }
        }
      }
      break;
  }

  if (p->flags & R_INDEX)
    set_option (OPTFORCEREDRAWINDEX);
  if (p->flags & R_PAGER)
    set_option (OPTFORCEREDRAWPAGER);
  if (p->flags & R_RESORT_SUB)
    set_option (OPTSORTSUBTHREADS);
  if (p->flags & R_RESORT)
    set_option (OPTNEEDRESORT);
  if (p->flags & R_RESORT_INIT)
    set_option (OPTRESORTINIT);
  if (p->flags & R_TREE)
    set_option (OPTREDRAWTREE);
}

static int parse_set (BUFFER *tmp, BUFFER *s, unsigned long data, BUFFER *err)
{
  int idx, query, unset, inv, reset, r = 0;
  char *p, scratch[_POSIX_PATH_MAX];

  while (MoreArgs (s))
  {
    /* reset state variables */
    query = 0;
    unset = data & M_SET_UNSET;
    inv = data & M_SET_INV;
    reset = data & M_SET_RESET;

    if (*s->dptr == '?')
    {
      query = 1;
      s->dptr++;
    }
    else if (mutt_strncmp ("no", s->dptr, 2) == 0)
    {
      s->dptr += 2;
      unset = !unset;
    }
    else if (mutt_strncmp ("inv", s->dptr, 3) == 0)
    {
      s->dptr += 3;
      inv = !inv;
    }
    else if (*s->dptr == '&')
    {
      reset = 1;
      s->dptr++;
    }

    /* get the variable name */
    mutt_extract_token (tmp, s, M_TOKEN_EQUAL);

    if ((idx = mutt_option_index (tmp->data)) == -1 &&
        !(reset && !mutt_strcmp ("all", tmp->data)))
    {
      snprintf (err->data, err->dsize, _("%s: unknown variable"), tmp->data);
      return (-1);
    }
    SKIPWS (s->dptr);

    if (reset)
    {
      if (query || unset || inv)
      {
        snprintf (err->data, err->dsize, _("prefix is illegal with reset"));
        return (-1);
      }

      if (s && *s->dptr == '=')
      {
        snprintf (err->data, err->dsize, _("value is illegal with reset"));
        return (-1);
      }
     
      if (!mutt_strcmp ("all", tmp->data))
      {
        for (idx = 0; MuttVars[idx].option; idx++)
          mutt_restore_default (&MuttVars[idx]);
        return 0;
      }
      else
        mutt_restore_default (&MuttVars[idx]);
    } 
    else if (DTYPE (MuttVars[idx].type) == DT_BOOL)
    { 
      if (s && *s->dptr == '=')
      {
        if (unset || inv || query)
        {
          snprintf (err->data, err->dsize, "Usage: set variable=yes|no");
          return (-1);
        }

        s->dptr++;
        mutt_extract_token (tmp, s, 0);
        if (ascii_strcasecmp ("yes", tmp->data) == 0)
          unset = inv = 0;
        else if (ascii_strcasecmp ("no", tmp->data) == 0)
          unset = 1;
        else
        {
          snprintf (err->data, err->dsize, "Usage: set variable=yes|no");
          return (-1);
        }
      }

      if (query)
      {
        snprintf (err->data, err->dsize, option (MuttVars[idx].data)
                        ? _("%s is set") : _("%s is unset"), tmp->data);
        return 0;
      }

      if (unset)
        unset_option (MuttVars[idx].data);
      else if (inv)
        toggle_option (MuttVars[idx].data);
      else
        set_option (MuttVars[idx].data);
    }
    else if (DTYPE (MuttVars[idx].type) == DT_STR ||
             DTYPE (MuttVars[idx].type) == DT_PATH ||
             DTYPE (MuttVars[idx].type) == DT_ADDR)
    {
      if (unset)
      {
        if (DTYPE (MuttVars[idx].type) == DT_ADDR)
          rfc822_free_address ((ADDRESS **) MuttVars[idx].data);
        else
          FREE ((void *)MuttVars[idx].data);
      }
      else if (query || *s->dptr != '=')
      {
        char _tmp[STRING];
        char *val = NULL;
        
        if (DTYPE (MuttVars[idx].type) == DT_ADDR)
        {
          _tmp[0] = '\0';
          rfc822_write_address (_tmp, sizeof (_tmp), *((ADDRESS **) MuttVars[idx].data), 0);
          val = _tmp;
        }
        else
          val = *((char **) MuttVars[idx].data);
        
        /* user requested the value of this variable */
        snprintf (err->data, err->dsize, "%s=\"%s\"", MuttVars[idx].option,
                  NONULL (val));
        break;
      }
      else
      {
        s->dptr++;

        /* copy the value of the string */
        if (DTYPE (MuttVars[idx].type) == DT_ADDR)
          rfc822_free_address ((ADDRESS **) MuttVars[idx].data);
        else
          FREE ((void *)MuttVars[idx].data);

        mutt_extract_token (tmp, s, 0);
        if (DTYPE (MuttVars[idx].type) == DT_PATH)
        {
          strfcpy (scratch, tmp->data, sizeof (scratch));
          mutt_expand_path (scratch, sizeof (scratch));
          *((char **) MuttVars[idx].data) = safe_strdup (scratch);
        }
        else if (DTYPE (MuttVars[idx].type) == DT_STR)
        {
          *((char **) MuttVars[idx].data) = safe_strdup (tmp->data);
          if (mutt_strcmp (MuttVars[idx].option, "charset") == 0)
            mutt_set_charset (Charset);
        }
        else
        {
          *((ADDRESS **) MuttVars[idx].data) = rfc822_parse_adrlist (NULL, tmp->data);
        }
      }
    }
    else if (DTYPE(MuttVars[idx].type) == DT_RX)
    {
      REGEXP *ptr = (REGEXP *) MuttVars[idx].data;
      regex_t *rx;
      int e, flags = 0;

      if (query || *s->dptr != '=')
      {
        /* user requested the value of this variable */
        snprintf (err->data, err->dsize, "%s=\"%s\"", MuttVars[idx].option,
                  NONULL (ptr->pattern));
        break;
      }

      if (option(OPTATTACHMSG) && !mutt_strcmp(MuttVars[idx].option, "reply_regexp"))
      {
        snprintf (err->data, err->dsize, "Operation not permitted when in attach-message mode.");
        r = -1;
        break;
      }
      
      s->dptr++;

      /* copy the value of the string */
      mutt_extract_token (tmp, s, 0);

      if (!ptr->pattern || mutt_strcmp (ptr->pattern, tmp->data) != 0)
      {
        int not = 0;

        /* $mask is case-sensitive */
        if (mutt_strcmp (MuttVars[idx].option, "mask") != 0)
          flags |= mutt_which_case (tmp->data);

        p = tmp->data;
        if (mutt_strcmp (MuttVars[idx].option, "mask") == 0)
        {
          if (*p == '!')
          {
            not = 1;
            p++;
          }
        }
          
        rx = (regex_t *) safe_malloc (sizeof (regex_t));
        if ((e = REGCOMP (rx, p, flags)) != 0)
        {
          regerror (e, rx, err->data, err->dsize);
          regfree (rx);
          FREE (&rx);
          break;
        }

        /* get here only if everything went smootly */
        if (ptr->pattern)
        {
          FREE (&ptr->pattern);
          regfree ((regex_t *) ptr->rx);
          FREE (&ptr->rx);
        }

        ptr->pattern = safe_strdup (tmp->data);
        ptr->rx = rx;
        ptr->not = not;

        /* $reply_regexp and $alterantes require special treatment */
        
        if (Context && Context->msgcount &&
            mutt_strcmp (MuttVars[idx].option, "reply_regexp") == 0)
        {
          regmatch_t pmatch[1];
          int i;
          
#define CUR_ENV Context->hdrs[i]->env
          for (i = 0; i < Context->msgcount; i++)
          {
            if (CUR_ENV && CUR_ENV->subject)
            {
              CUR_ENV->real_subj = (regexec (ReplyRegexp.rx,
                                    CUR_ENV->subject, 1, pmatch, 0)) ?
                                    CUR_ENV->subject : 
                                    CUR_ENV->subject + pmatch[0].rm_eo;
            }
          }
#undef CUR_ENV
        }
      }
    }
    else if (DTYPE(MuttVars[idx].type) == DT_MAGIC)
    {
      if (query || *s->dptr != '=')
      {
        switch (DefaultMagic)
        {
          case M_MBOX:
            p = "mbox";
            break;
          case M_MMDF:
            p = "MMDF";
            break;
          case M_MH:
            p = "MH";
            break;
          case M_MAILDIR:
            p = "Maildir";
            break;
          default:
            p = "unknown";
            break;
        }
        snprintf (err->data, err->dsize, "%s=%s", MuttVars[idx].option, p);
        break;
      }

      s->dptr++;

      /* copy the value of the string */
      mutt_extract_token (tmp, s, 0);
      if (mx_set_magic (tmp->data))
      {
        snprintf (err->data, err->dsize, _("%s: invalid mailbox type"), tmp->data);
        r = -1;
        break;
      }
    }
    else if (DTYPE(MuttVars[idx].type) == DT_NUM)
    {
      short *ptr = (short *) MuttVars[idx].data;
      int val;
      char *t;

      if (query || *s->dptr != '=')
      {
        /* user requested the value of this variable */
        snprintf (err->data, err->dsize, "%s=%d", MuttVars[idx].option, *ptr);
        break;
      }

      s->dptr++;

      mutt_extract_token (tmp, s, 0);
      val = strtol (tmp->data, &t, 0);

      if (!*tmp->data || *t || (short) val != val)
      {
        snprintf (err->data, err->dsize, _("%s: invalid value"), tmp->data);
        r = -1;
        break;
      }
      else
        *ptr = (short) val;

      /* these ones need a sanity check */
      if (mutt_strcmp (MuttVars[idx].option, "history") == 0)
      {
        if (*ptr < 0)
          *ptr = 0;
        mutt_init_history ();
      }
      else if (mutt_strcmp (MuttVars[idx].option, "pager_index_lines") == 0)
      {
        if (*ptr < 0)
          *ptr = 0;
      }
    }
    else if (DTYPE (MuttVars[idx].type) == DT_QUAD)
    {
      if (query)
      {
        char *vals[] = { "no", "yes", "ask-no", "ask-yes" };

        snprintf (err->data, err->dsize, "%s=%s", MuttVars[idx].option,
                  vals [ quadoption (MuttVars[idx].data) ]);
        break;
      }

      if (*s->dptr == '=')
      {
        s->dptr++;
        mutt_extract_token (tmp, s, 0);
        if (ascii_strcasecmp ("yes", tmp->data) == 0)
          set_quadoption (MuttVars[idx].data, M_YES);
        else if (ascii_strcasecmp ("no", tmp->data) == 0)
          set_quadoption (MuttVars[idx].data, M_NO);
        else if (ascii_strcasecmp ("ask-yes", tmp->data) == 0)
          set_quadoption (MuttVars[idx].data, M_ASKYES);
        else if (ascii_strcasecmp ("ask-no", tmp->data) == 0)
          set_quadoption (MuttVars[idx].data, M_ASKNO);
        else
        {
          snprintf (err->data, err->dsize, _("%s: invalid value"), tmp->data);
          r = -1;
          break;
        }
      }
      else
      {
        if (inv)
          toggle_quadoption (MuttVars[idx].data);
        else if (unset)
          set_quadoption (MuttVars[idx].data, M_NO);
        else
          set_quadoption (MuttVars[idx].data, M_YES);
      }
    }
    else if (DTYPE (MuttVars[idx].type) == DT_SORT)
    {
      const struct mapping_t *map = NULL;

      switch (MuttVars[idx].type & DT_SUBTYPE_MASK)
      {
        case DT_SORT_ALIAS:
          map = SortAliasMethods;
          break;
        case DT_SORT_BROWSER:
          map = SortBrowserMethods;
          break;
        case DT_SORT_KEYS:
          if ((WithCrypto & APPLICATION_PGP))
            map = SortKeyMethods;
          break;
        case DT_SORT_AUX:
          map = SortAuxMethods;
          break;
        default:
          map = SortMethods;
          break;
      }

      if (!map)
      {
        snprintf (err->data, err->dsize, _("%s: Unknown type."), MuttVars[idx].option);
        r = -1;
        break;
      }
      
      if (query || *s->dptr != '=')
      {
        p = mutt_getnamebyvalue (*((short *) MuttVars[idx].data) & SORT_MASK, map);

        snprintf (err->data, err->dsize, "%s=%s%s%s", MuttVars[idx].option,
                  (*((short *) MuttVars[idx].data) & SORT_REVERSE) ? "reverse-" : "",
                  (*((short *) MuttVars[idx].data) & SORT_LAST) ? "last-" : "",
                  p);
        return 0;
      }
      s->dptr++;
      mutt_extract_token (tmp, s , 0);

      if (parse_sort ((short *) MuttVars[idx].data, tmp->data, map, err) == -1)
      {
        r = -1;
        break;
      }
    }
    else
    {
      snprintf (err->data, err->dsize, _("%s: unknown type"), MuttVars[idx].option);
      r = -1;
      break;
    }

    if (MuttVars[idx].flags & R_INDEX)
      set_option (OPTFORCEREDRAWINDEX);
    if (MuttVars[idx].flags & R_PAGER)
      set_option (OPTFORCEREDRAWPAGER);
    if (MuttVars[idx].flags & R_RESORT_SUB)
      set_option (OPTSORTSUBTHREADS);
    if (MuttVars[idx].flags & R_RESORT)
      set_option (OPTNEEDRESORT);
    if (MuttVars[idx].flags & R_RESORT_INIT)
      set_option (OPTRESORTINIT);
    if (MuttVars[idx].flags & R_TREE)
      set_option (OPTREDRAWTREE);
  }
  return (r);
}

#define MAXERRS 128

/* reads the specified initialization file.  returns -1 if errors were found
   so that we can pause to let the user know...  */
static int source_rc (const char *rcfile, BUFFER *err)
{
  FILE *f;
  int line = 0, rc = 0, conv = 0;
  BUFFER token;
  char *linebuf = NULL;
  char *currentline = NULL;
  size_t buflen;
  pid_t pid;

  dprint (2, (debugfile, "Reading configuration file '%s'.\n",
          rcfile));
  
  if ((f = mutt_open_read (rcfile, &pid)) == NULL)
  {
    snprintf (err->data, err->dsize, "%s: %s", rcfile, strerror (errno));
    return (-1);
  }

  memset (&token, 0, sizeof (token));
  while ((linebuf = mutt_read_line (linebuf, &buflen, f, &line)) != NULL)
  {
    conv=ConfigCharset && (*ConfigCharset) && Charset;
    if (conv) 
    {
      currentline=safe_strdup(linebuf);
      if (!currentline) continue;
      mutt_convert_string(&currentline, ConfigCharset, Charset, 0);
    } 
    else 
      currentline=linebuf;

    if (mutt_parse_rc_line (currentline, &token, err) == -1)
    {
      mutt_error (_("Error in %s, line %d: %s"), rcfile, line, err->data);
      if (--rc < -MAXERRS) 
      {
        if (conv) FREE(&currentline);
        break;
      }
    }
    else
    {
      if (rc < 0)
        rc = -1;
    }
    if (conv)
      FREE(&currentline);
  }
  FREE (&token.data);
  FREE (&linebuf);
  fclose (f);
  if (pid != -1)
    mutt_wait_filter (pid);
  if (rc)
  {
    /* the muttrc source keyword */
    snprintf (err->data, err->dsize, rc >= -MAXERRS ? _("source: errors in %s")
      : _("source: reading aborted due too many errors in %s"), rcfile);
    rc = -1;
  }
  return (rc);
}

#undef MAXERRS

static int parse_source (BUFFER *tmp, BUFFER *s, unsigned long data, BUFFER *err)
{
  char path[_POSIX_PATH_MAX];
  int rc = 0;

  do
  {
    if (mutt_extract_token (tmp, s, 0) != 0)
    {
      snprintf (err->data, err->dsize, _("source: error at %s"), s->dptr);
      return (-1);
    }

    strfcpy (path, tmp->data, sizeof (path));
    mutt_expand_path (path, sizeof (path));

    rc += source_rc (path, err);
  }
  while (MoreArgs (s));

  return ((rc < 0) ? -1 : 0);
}

/* line         command to execute

   token        scratch buffer to be used by parser.  caller should free
                token->data when finished.  the reason for this variable is
                to avoid having to allocate and deallocate a lot of memory
                if we are parsing many lines.  the caller can pass in the
                memory to use, which avoids having to create new space for
                every call to this function.

   err          where to write error messages */
int mutt_parse_rc_line (/* const */ char *line, BUFFER *token, BUFFER *err)
{
  int i, r = -1;
  BUFFER expn;

  memset (&expn, 0, sizeof (expn));
  expn.data = expn.dptr = line;
  expn.dsize = mutt_strlen (line);

  *err->data = 0;

  SKIPWS (expn.dptr);
  while (*expn.dptr)
  {
    if (*expn.dptr == '#')
      break; /* rest of line is a comment */
    if (*expn.dptr == ';')
    {
      expn.dptr++;
      continue;
    }
    mutt_extract_token (token, &expn, 0);
    for (i = 0; Commands[i].name; i++)
    {
      if (!mutt_strcmp (token->data, Commands[i].name))
      {
        if (Commands[i].func (token, &expn, Commands[i].data, err) != 0)
          goto finish;
        break;
      }
    }
    if (!Commands[i].name)
    {
      snprintf (err->data, err->dsize, _("%s: unknown command"), NONULL (token->data));
      goto finish;
    }
  }
  r = 0;
finish:
  if (expn.destroy)
    FREE (&expn.data);
  return (r);
}


#define NUMVARS (sizeof (MuttVars)/sizeof (MuttVars[0]))
#define NUMCOMMANDS (sizeof (Commands)/sizeof (Commands[0]))
/* initial string that starts completion. No telling how much crap 
 * the user has typed so far. Allocate LONG_STRING just to be sure! */
char User_typed [LONG_STRING] = {0}; 

int  Num_matched = 0; /* Number of matches for completion */
char Completed [STRING] = {0}; /* completed string (command or variable) */
char *Matches[MAX(NUMVARS,NUMCOMMANDS) + 1]; /* all the matches + User_typed */

/* helper function for completion.  Changes the dest buffer if
   necessary/possible to aid completion.
        dest == completion result gets here.
        src == candidate for completion.
        try == user entered data for completion.
        len == length of dest buffer.
*/
static void candidate (char *dest, char *try, char *src, int len)
{
  int l;

  if (strstr (src, try) == src)
  {
    Matches[Num_matched++] = src;
    if (dest[0] == 0)
      strfcpy (dest, src, len);
    else
    {
      for (l = 0; src[l] && src[l] == dest[l]; l++);
      dest[l] = 0;
    }
  }
}

int mutt_command_complete (char *buffer, size_t len, int pos, int numtabs)
{
  char *pt = buffer;
  int num;
  int spaces; /* keep track of the number of leading spaces on the line */

  SKIPWS (buffer);
  spaces = buffer - pt;

  pt = buffer + pos - spaces;
  while ((pt > buffer) && !isspace ((unsigned char) *pt))
    pt--;

  if (pt == buffer) /* complete cmd */
  {
    /* first TAB. Collect all the matches */
    if (numtabs == 1)
    {
      Num_matched = 0;
      strfcpy (User_typed, pt, sizeof (User_typed));
      memset (Matches, 0, sizeof (Matches));
      memset (Completed, 0, sizeof (Completed));
      for (num = 0; Commands[num].name; num++)
        candidate (Completed, User_typed, Commands[num].name, sizeof (Completed));
      Matches[Num_matched++] = User_typed;

      /* All matches are stored. Longest non-ambiguous string is ""
       * i.e. dont change 'buffer'. Fake successful return this time */
      if (User_typed[0] == 0)
        return 1;
    }

    if (Completed[0] == 0 && User_typed[0])
      return 0;

     /* Num_matched will _always_ be atleast 1 since the initial
      * user-typed string is always stored */
    if (numtabs == 1 && Num_matched == 2)
      snprintf(Completed, sizeof(Completed),"%s", Matches[0]);
    else if (numtabs > 1 && Num_matched > 2)
      /* cycle thru all the matches */
      snprintf(Completed, sizeof(Completed), "%s", 
               Matches[(numtabs - 2) % Num_matched]);

    /* return the completed command */
    strncpy (buffer, Completed, len - spaces);
  }
  else if (!mutt_strncmp (buffer, "set", 3)
           || !mutt_strncmp (buffer, "unset", 5)
           || !mutt_strncmp (buffer, "reset", 5)
           || !mutt_strncmp (buffer, "toggle", 6))
  {             /* complete variables */
    char *prefixes[] = { "no", "inv", "?", "&", 0 };
    
    pt++;
    /* loop through all the possible prefixes (no, inv, ...) */
    if (!mutt_strncmp (buffer, "set", 3))
    {
      for (num = 0; prefixes[num]; num++)
      {
        if (!mutt_strncmp (pt, prefixes[num], mutt_strlen (prefixes[num])))
        {
          pt += mutt_strlen (prefixes[num]);
          break;
        }
      }
    }
    
    /* first TAB. Collect all the matches */
    if (numtabs == 1)
    {
      Num_matched = 0;
      strfcpy (User_typed, pt, sizeof (User_typed));
      memset (Matches, 0, sizeof (Matches));
      memset (Completed, 0, sizeof (Completed));
      for (num = 0; MuttVars[num].option; num++)
        candidate (Completed, User_typed, MuttVars[num].option, sizeof (Completed));
      Matches[Num_matched++] = User_typed;

      /* All matches are stored. Longest non-ambiguous string is ""
       * i.e. dont change 'buffer'. Fake successful return this time */
      if (User_typed[0] == 0)
        return 1;
    }

    if (Completed[0] == 0 && User_typed[0])
      return 0;

    /* Num_matched will _always_ be atleast 1 since the initial
     * user-typed string is always stored */
    if (numtabs == 1 && Num_matched == 2)
      snprintf(Completed, sizeof(Completed),"%s", Matches[0]);
    else if (numtabs > 1 && Num_matched > 2)
    /* cycle thru all the matches */
      snprintf(Completed, sizeof(Completed), "%s", 
               Matches[(numtabs - 2) % Num_matched]);

    strncpy (pt, Completed, buffer + len - pt - spaces);
  }
  else if (!mutt_strncmp (buffer, "exec", 4))
  {
    struct binding_t *menu = km_get_table (CurrentMenu);

    if (!menu && CurrentMenu != MENU_PAGER)
      menu = OpGeneric;
    
    pt++;
    /* first TAB. Collect all the matches */
    if (numtabs == 1)
    {
      Num_matched = 0;
      strfcpy (User_typed, pt, sizeof (User_typed));
      memset (Matches, 0, sizeof (Matches));
      memset (Completed, 0, sizeof (Completed));
      for (num = 0; menu[num].name; num++)
        candidate (Completed, User_typed, menu[num].name, sizeof (Completed));
      /* try the generic menu */
      if (Completed[0] == 0 && CurrentMenu != MENU_PAGER) 
      {
        menu = OpGeneric;
        for (num = 0; menu[num].name; num++)
          candidate (Completed, User_typed, menu[num].name, sizeof (Completed));
      }
      Matches[Num_matched++] = User_typed;

      /* All matches are stored. Longest non-ambiguous string is ""
       * i.e. dont change 'buffer'. Fake successful return this time */
      if (User_typed[0] == 0)
        return 1;
    }

    if (Completed[0] == 0 && User_typed[0])
      return 0;

    /* Num_matched will _always_ be atleast 1 since the initial
     * user-typed string is always stored */
    if (numtabs == 1 && Num_matched == 2)
      snprintf(Completed, sizeof(Completed),"%s", Matches[0]);
    else if (numtabs > 1 && Num_matched > 2)
    /* cycle thru all the matches */
      snprintf(Completed, sizeof(Completed), "%s", 
               Matches[(numtabs - 2) % Num_matched]);

    strncpy (pt, Completed, buffer + len - pt - spaces);
  }
  else
    return 0;

  return 1;
}

int mutt_var_value_complete (char *buffer, size_t len, int pos)
{
  char var[STRING], *pt = buffer;
  int spaces;
  
  if (buffer[0] == 0)
    return 0;

  SKIPWS (buffer);
  spaces = buffer - pt;

  pt = buffer + pos - spaces;
  while ((pt > buffer) && !isspace ((unsigned char) *pt))
    pt--;
  pt++; /* move past the space */
  if (*pt == '=') /* abort if no var before the '=' */
    return 0;

  if (mutt_strncmp (buffer, "set", 3) == 0)
  {
    int idx;
    strfcpy (var, pt, sizeof (var));
    /* ignore the trailing '=' when comparing */
    var[mutt_strlen (var) - 1] = 0;
    if ((idx = mutt_option_index (var)) == -1) 
      return 0; /* no such variable. */
    else
    {
      char tmp [LONG_STRING], tmp2[LONG_STRING];
      char *s, *d;
      size_t dlen = buffer + len - pt - spaces;
      char *vals[] = { "no", "yes", "ask-no", "ask-yes" };

      tmp[0] = '\0';

      if ((DTYPE(MuttVars[idx].type) == DT_STR) || 
          (DTYPE(MuttVars[idx].type) == DT_PATH) ||
          (DTYPE(MuttVars[idx].type) == DT_RX))
      {
        strfcpy (tmp, NONULL (*((char **) MuttVars[idx].data)), sizeof (tmp));
        if (DTYPE (MuttVars[idx].type) == DT_PATH)
          mutt_pretty_mailbox (tmp);
      }
      else if (DTYPE (MuttVars[idx].type) == DT_ADDR)
      {
        rfc822_write_address (tmp, sizeof (tmp), *((ADDRESS **) MuttVars[idx].data), 0);
      }
      else if (DTYPE (MuttVars[idx].type) == DT_QUAD)
        strfcpy (tmp, vals[quadoption (MuttVars[idx].data)], sizeof (tmp));
      else if (DTYPE (MuttVars[idx].type) == DT_NUM)
        snprintf (tmp, sizeof (tmp), "%d", (*((short *) MuttVars[idx].data)));
      else if (DTYPE (MuttVars[idx].type) == DT_SORT)
      {
        const struct mapping_t *map;
        char *p;

        switch (MuttVars[idx].type & DT_SUBTYPE_MASK)
        {
          case DT_SORT_ALIAS:
            map = SortAliasMethods;
            break;
          case DT_SORT_BROWSER:
            map = SortBrowserMethods;
            break;
          case DT_SORT_KEYS:
            if ((WithCrypto & APPLICATION_PGP))
              map = SortKeyMethods;
            else
              map = SortMethods;
            break;
          default:
            map = SortMethods;
            break;
        }
        p = mutt_getnamebyvalue (*((short *) MuttVars[idx].data) & SORT_MASK, map);
        snprintf (tmp, sizeof (tmp), "%s%s%s",
                  (*((short *) MuttVars[idx].data) & SORT_REVERSE) ? "reverse-" : "",
                  (*((short *) MuttVars[idx].data) & SORT_LAST) ? "last-" : "",
                  p);
      }
      else if (DTYPE (MuttVars[idx].type) == DT_BOOL)
        strfcpy (tmp, option (MuttVars[idx].data) ? "yes" : "no", sizeof (tmp));
      else
        return 0;
      
      for (s = tmp, d = tmp2; *s && (d - tmp2) < sizeof (tmp2) - 2;)
      {
        if (*s == '\\' || *s == '"')
          *d++ = '\\';
        *d++ = *s++;
      }
      *d = '\0';
      
      strfcpy (tmp, pt, sizeof (tmp));
      snprintf (pt, dlen, "%s\"%s\"", tmp, tmp2);
          
      return 1;
    }
  }
  return 0;
}

/* Implement the -Q command line flag */
int mutt_query_variables (LIST *queries)
{
  LIST *p;
  
  char errbuff[STRING];
  char command[STRING];
  
  BUFFER err, token;
  
  memset (&err, 0, sizeof (err));
  memset (&token, 0, sizeof (token));
  
  err.data = errbuff;
  err.dsize = sizeof (errbuff);
  
  for (p = queries; p; p = p->next)
  {
    snprintf (command, sizeof (command), "set ?%s\n", p->data);
    if (mutt_parse_rc_line (command, &token, &err) == -1)
    {
      fprintf (stderr, "%s\n", err.data);
      FREE (&token.data);
      return 1;
    }
    printf ("%s\n", err.data);
  }
  
  FREE (&token.data);
  return 0;
}

char *mutt_getnamebyvalue (int val, const struct mapping_t *map)
{
  int i;

  for (i=0; map[i].name; i++)
    if (map[i].value == val)
      return (map[i].name);
  return NULL;
}

int mutt_getvaluebyname (const char *name, const struct mapping_t *map)
{
  int i;

  for (i = 0; map[i].name; i++)
    if (ascii_strcasecmp (map[i].name, name) == 0)
      return (map[i].value);
  return (-1);
}

#ifdef DEBUG
static void start_debug (void)
{
  time_t t;
  int i;
  char buf[_POSIX_PATH_MAX];
  char buf2[_POSIX_PATH_MAX];

  /* rotate the old debug logs */
  for (i=3; i>=0; i--)
  {
    snprintf (buf, sizeof(buf), "%s/.muttdebug%d", NONULL(Homedir), i);
    snprintf (buf2, sizeof(buf2), "%s/.muttdebug%d", NONULL(Homedir), i+1);
    rename (buf, buf2);
  }
  if ((debugfile = safe_fopen(buf, "w")) != NULL)
  {
    t = time (0);
    setbuf (debugfile, NULL); /* don't buffer the debugging output! */
    fprintf (debugfile, "Mutt-ng %s started at %s.\nDebugging at level %d.\n\n",
             MUTT_VERSION, asctime (localtime (&t)), debuglevel);
  }
}
#endif

static int mutt_execute_commands (LIST *p)
{
  BUFFER err, token;
  char errstr[SHORT_STRING];

  memset (&err, 0, sizeof (err));
  err.data = errstr;
  err.dsize = sizeof (errstr);
  memset (&token, 0, sizeof (token));
  for (; p; p = p->next)
  {
    if (mutt_parse_rc_line (p->data, &token, &err) != 0)
    {
      fprintf (stderr, _("Error in command line: %s\n"), err.data);
      FREE (&token.data);
      return (-1);
    }
  }
  FREE (&token.data);
  return 0;
}

void mutt_init (int skip_sys_rc, LIST *commands)
{
  struct passwd *pw;
  struct utsname utsname;
  char *p, buffer[STRING], error[STRING];
  int i, default_rc = 0, need_pause = 0;
  BUFFER err;

  memset (&err, 0, sizeof (err));
  err.data = error;
  err.dsize = sizeof (error);

  /* 
   * XXX - use something even more difficult to predict?
   */
  snprintf (AttachmentMarker, sizeof (AttachmentMarker),
            "\033]9;%ld\a", (long) time (NULL));
  
  /* on one of the systems I use, getcwd() does not return the same prefix
     as is listed in the passwd file */
  if ((p = getenv ("HOME")))
    Homedir = safe_strdup (p);

  /* Get some information about the user */
  if ((pw = getpwuid (getuid ())))
  {
    char rnbuf[STRING];

    Username = safe_strdup (pw->pw_name);
    if (!Homedir)
      Homedir = safe_strdup (pw->pw_dir);

    Realname = safe_strdup (mutt_gecos_name (rnbuf, sizeof (rnbuf), pw));
    Shell = safe_strdup (pw->pw_shell);
  }
  else 
  {
    if (!Homedir)
    {
      mutt_endwin (NULL);
      fputs (_("unable to determine home directory"), stderr);
      exit (1);
    }
    if ((p = getenv ("USER")))
      Username = safe_strdup (p);
    else
    {
      mutt_endwin (NULL);
      fputs (_("unable to determine username"), stderr);
      exit (1);
    }
    Shell = safe_strdup ((p = getenv ("SHELL")) ? p : "/bin/sh");
  }

#ifdef DEBUG
  /* Start up debugging mode if requested */
  if (debuglevel > 0)
    start_debug ();
#endif

  /* And about the host... */
  uname (&utsname);
  /* some systems report the FQDN instead of just the hostname */
  if ((p = strchr (utsname.nodename, '.')))
  {
    Hostname = mutt_substrdup (utsname.nodename, p);
    p++;
    strfcpy (buffer, p, sizeof (buffer)); /* save the domain for below */
  }
  else
    Hostname = safe_strdup (utsname.nodename);

#ifndef DOMAIN
#define DOMAIN buffer
  if (!p && getdnsdomainname (buffer, sizeof (buffer)) == -1)
    Fqdn = safe_strdup ("@");
  else
#endif /* DOMAIN */
    if (*DOMAIN != '@')
  {
    Fqdn = safe_malloc (mutt_strlen (DOMAIN) + mutt_strlen (Hostname) + 2);
    sprintf (Fqdn, "%s.%s", NONULL(Hostname), DOMAIN);  /* __SPRINTF_CHECKED__ */
  }
  else
    Fqdn = safe_strdup(NONULL(Hostname));

#ifdef USE_NNTP
  {
    FILE *f;
    char *i;

    if ((f = safe_fopen (SYSCONFDIR "/nntpserver", "r")))
    {
      buffer[0] = '\0';
      fgets (buffer, sizeof (buffer), f);
      p = &buffer;
      SKIPWS (p);
      i = p;
      while (*i && (*i != ' ') && (*i != '\t') && (*i != '\r') && (*i != '\n')) i++;
      *i = '\0';
      NewsServer = safe_strdup (p);
      fclose (f);
    }
  }
  if ((p = getenv ("NNTPSERVER")))
    NewsServer = safe_strdup (p);
#endif

  if ((p = getenv ("MAIL")))
    Spoolfile = safe_strdup (p);
  else if ((p = getenv ("MAILDIR")))
    Spoolfile = safe_strdup (p);
  else
  {
#ifdef HOMESPOOL
    mutt_concat_path (buffer, NONULL (Homedir), MAILPATH, sizeof (buffer));
#else
    mutt_concat_path (buffer, MAILPATH, NONULL(Username), sizeof (buffer));
#endif
    Spoolfile = safe_strdup (buffer);
  }

  if ((p = getenv ("MAILCAPS")))
    MailcapPath = safe_strdup (p);
  else
  {
    /* Default search path from RFC1524 */
    MailcapPath = safe_strdup ("~/.mailcap:" PKGDATADIR "/mailcap:" SYSCONFDIR "/mailcap:/etc/mailcap:/usr/etc/mailcap:/usr/local/etc/mailcap");
  }

  Tempdir = safe_strdup ((p = getenv ("TMPDIR")) ? p : "/tmp");

  p = getenv ("VISUAL");
  if (!p)
  {
    p = getenv ("EDITOR");
    if (!p)
      p = "vi";
  }
  Editor = safe_strdup (p);
  Visual = safe_strdup (p);

  if ((p = getenv ("REPLYTO")) != NULL)
  {
    BUFFER buf, token;

    snprintf (buffer, sizeof (buffer), "Reply-To: %s", p);

    memset (&buf, 0, sizeof (buf));
    buf.data = buf.dptr = buffer;
    buf.dsize = mutt_strlen (buffer);

    memset (&token, 0, sizeof (token));
    parse_my_hdr (&token, &buf, 0, &err);
    FREE (&token.data);
  }

  if ((p = getenv ("EMAIL")) != NULL)
    From = rfc822_parse_adrlist (NULL, p);
  
  mutt_set_langinfo_charset ();
  mutt_set_charset (Charset);
  
  
  /* Set standard defaults */
  for (i = 0; MuttVars[i].option; i++)
  {
    mutt_set_default (&MuttVars[i]);
    mutt_restore_default (&MuttVars[i]);
  }

  CurrentMenu = MENU_MAIN;


#ifndef LOCALES_HACK
  /* Do we have a locale definition? */
  if (((p = getenv ("LC_ALL")) != NULL && p[0]) ||
      ((p = getenv ("LANG")) != NULL && p[0]) ||
      ((p = getenv ("LC_CTYPE")) != NULL && p[0]))
    set_option (OPTLOCALES);
#endif

#ifdef HAVE_GETSID
  /* Unset suspend by default if we're the session leader */
  if (getsid(0) == getpid())
    unset_option (OPTSUSPEND);
#endif

  mutt_init_history ();

  
  
  
  /*
   * 
   *                       BIG FAT WARNING
   * 
   * When changing the code which looks for a configuration file,
   * please also change the corresponding code in muttbug.sh.in.
   * 
   * 
   */
  
  
  
  
  if (!Muttrc)
  {
    snprintf (buffer, sizeof(buffer), "%s/.muttngrc-%s", NONULL(Homedir), MUTT_VERSION);
    if (access(buffer, F_OK) == -1)
      snprintf (buffer, sizeof(buffer), "%s/.muttngrc", NONULL(Homedir));
    if (access(buffer, F_OK) == -1)
      snprintf (buffer, sizeof (buffer), "%s/.muttng/muttngrc-%s", NONULL(Homedir), MUTT_VERSION);
    if (access(buffer, F_OK) == -1)
      snprintf (buffer, sizeof (buffer), "%s/.muttng/muttngrc", NONULL(Homedir));
    
    default_rc = 1;
    Muttrc = safe_strdup (buffer);
  }
  else
  {
    strfcpy (buffer, Muttrc, sizeof (buffer));
    FREE (&Muttrc);
    mutt_expand_path (buffer, sizeof (buffer));
    Muttrc = safe_strdup (buffer);
  }
  FREE (&AliasFile);
  AliasFile = safe_strdup (NONULL(Muttrc));

  /* Process the global rc file if it exists and the user hasn't explicity
     requested not to via "-n".  */
  if (!skip_sys_rc)
  {
    snprintf (buffer, sizeof(buffer), "%s/Muttngrc-%s", SYSCONFDIR, MUTT_VERSION);
    if (access (buffer, F_OK) == -1)
      snprintf (buffer, sizeof(buffer), "%s/Muttngrc", SYSCONFDIR);
    if (access (buffer, F_OK) == -1)
      snprintf (buffer, sizeof (buffer), "%s/Muttngrc-%s", PKGDATADIR, MUTT_VERSION);
    if (access (buffer, F_OK) == -1)
      snprintf (buffer, sizeof (buffer), "%s/Muttngrc", PKGDATADIR);
    if (access (buffer, F_OK) != -1)
    {
      if (source_rc (buffer, &err) != 0)
      {
        fputs (err.data, stderr);
        fputc ('\n', stderr);
        need_pause = 1;
      }
    }
  }

  /* Read the user's initialization file.  */
  if (access (Muttrc, F_OK) != -1)
  {
    if (!option (OPTNOCURSES))
      endwin ();
    if (source_rc (Muttrc, &err) != 0)
    {
      fputs (err.data, stderr);
      fputc ('\n', stderr);
      need_pause = 1;
    }
  }
  else if (!default_rc)
  {
    /* file specified by -F does not exist */
    snprintf (buffer, sizeof (buffer), "%s: %s", Muttrc, strerror (errno));
    mutt_endwin (buffer);
    exit (1);
  }

  if (mutt_execute_commands (commands) != 0)
    need_pause = 1;

  if (need_pause && !option (OPTNOCURSES))
  {
    if (mutt_any_key_to_continue (NULL) == -1)
      mutt_exit(1);
  }

#if 0
  set_option (OPTWEED); /* turn weeding on by default */
#endif
}

int mutt_get_hook_type (const char *name)
{
  struct command_t *c;

  for (c = Commands ; c->name ; c++)
    if (c->func == mutt_parse_hook && ascii_strcasecmp (c->name, name) == 0)
      return c->data;
  return 0;
}