mutt / commands.c

/*
 * Copyright (C) 1996-2000 Michael R. Elkins <[e-mail]>
 * Copyright (C) 2000-2004,2006 Thomas Roessler <[e-mail]>
 *
 *     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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

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

#include "version.h"
#include "mutt.h"
#include "mutt_curses.h"
#include "mutt_menu.h"
#include "mime.h"
#include "sort.h"
#include "mailbox.h"
#include "copy.h"
#include "mx.h"
#include "pager.h"
#include "mutt_crypt.h"
#include "mutt_idna.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#ifdef USE_IMAP
#include "imap.h"
#endif

#ifdef USE_AUTOCRYPT
#include "autocrypt/autocrypt.h"
#endif

#include "buffy.h"

#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <utime.h>

static const char *ExtPagerProgress = "all";

/* The folder the user last saved to.  Used by ci_save_message() */
static char LastSaveFolder[_POSIX_PATH_MAX] = "";

static void process_protected_headers (HEADER *cur)
{
  ENVELOPE *prot_headers = NULL;
  regmatch_t pmatch[1];

  if (!option (OPTCRYPTPROTHDRSREAD)
#ifdef USE_AUTOCRYPT
      && !option (OPTAUTOCRYPT)
#endif
    )
    return;

  /* Grab protected headers to update in the index */
  if (cur->security & SIGN)
  {
    /* Don't update on a bad signature.
     *
     * This is a simplification.  It's possible the headers are in the
     * encrypted part of a nested encrypt/signed.  But properly handling that
     * case would require more complexity in the decryption handlers, which
     * I'm not sure is worth it. */
    if (!(cur->security & GOODSIGN))
      return;

    if (mutt_is_multipart_signed (cur->content) &&
        cur->content->parts)
    {
      prot_headers = cur->content->parts->mime_headers;
    }
    else if ((WithCrypto & APPLICATION_SMIME) &&
             mutt_is_application_smime (cur->content))
    {
      prot_headers = cur->content->mime_headers;
    }
  }
  if (!prot_headers && (cur->security & ENCRYPT))
  {
    if ((WithCrypto & APPLICATION_PGP) &&
        (mutt_is_valid_multipart_pgp_encrypted (cur->content) ||
         mutt_is_malformed_multipart_pgp_encrypted (cur->content)))
    {
      prot_headers = cur->content->mime_headers;
    }
    else if ((WithCrypto & APPLICATION_SMIME) &&
             mutt_is_application_smime (cur->content))
    {
      prot_headers = cur->content->mime_headers;
    }
  }

  /* Update protected headers in the index and header cache. */
  if (option (OPTCRYPTPROTHDRSREAD) &&
      prot_headers &&
      prot_headers->subject &&
      mutt_strcmp (cur->env->subject, prot_headers->subject))
  {
    if (Context->subj_hash && cur->env->real_subj)
      hash_delete (Context->subj_hash, cur->env->real_subj, cur, NULL);

    mutt_str_replace (&cur->env->subject, prot_headers->subject);
    FREE (&cur->env->disp_subj);
    if (regexec (ReplyRegexp.rx, cur->env->subject, 1, pmatch, 0) == 0)
      cur->env->real_subj = cur->env->subject + pmatch[0].rm_eo;
    else
      cur->env->real_subj = cur->env->subject;

    if (Context->subj_hash)
      hash_insert (Context->subj_hash, cur->env->real_subj, cur);

    mx_save_to_header_cache (Context, cur);

    /* Also persist back to the message headers if this is set */
    if (option (OPTCRYPTPROTHDRSSAVE))
    {
      cur->env->changed |= MUTT_ENV_CHANGED_SUBJECT;
      cur->changed = 1;
      Context->changed = 1;
    }
  }

#ifdef USE_AUTOCRYPT
  if (option (OPTAUTOCRYPT) &&
      (cur->security & ENCRYPT) &&
      prot_headers &&
      prot_headers->autocrypt_gossip)
  {
    mutt_autocrypt_process_gossip_header (cur, prot_headers);
  }
#endif
}

int mutt_display_message (HEADER *cur)
{
  BUFFER *tempfile = NULL;
  int rc = 0, builtin = 0;
  int cmflags = MUTT_CM_DECODE | MUTT_CM_DISPLAY | MUTT_CM_CHARCONV;
  FILE *fpout = NULL;
  FILE *fpfilterout = NULL;
  pid_t filterpid = -1;
  int res;

  mutt_parse_mime_message (Context, cur);
  mutt_message_hook (Context, cur, MUTT_MESSAGEHOOK);

  /* see if crypto is needed for this message.  if so, we should exit curses */
  if (WithCrypto && cur->security)
  {
    if (cur->security & ENCRYPT)
    {
      if (cur->security & APPLICATION_SMIME)
	crypt_smime_getkeys (cur->env);
      if (!crypt_valid_passphrase(cur->security))
	goto cleanup;

      cmflags |= MUTT_CM_VERIFY;
    }
    else if (cur->security & SIGN)
    {
      /* find out whether or not the verify signature */
      /* L10N: Used for the $crypt_verify_sig prompt */
      if (query_quadoption (OPT_VERIFYSIG, _("Verify signature?")) == MUTT_YES)
      {
	cmflags |= MUTT_CM_VERIFY;
      }
    }
  }

  if (cmflags & MUTT_CM_VERIFY || cur->security & ENCRYPT)
  {
    if (cur->security & APPLICATION_PGP)
    {
      if (cur->env->from)
        crypt_pgp_invoke_getkeys (cur->env->from);

      crypt_invoke_message (APPLICATION_PGP);
    }

    if (cur->security & APPLICATION_SMIME)
      crypt_invoke_message (APPLICATION_SMIME);
  }


  tempfile = mutt_buffer_pool_get ();
  mutt_buffer_mktemp (tempfile);
  if ((fpout = safe_fopen (mutt_b2s (tempfile), "w")) == NULL)
  {
    mutt_error _("Could not create temporary file!");
    goto cleanup;
  }

  if (DisplayFilter)
  {
    fpfilterout = fpout;
    fpout = NULL;
    /* mutt_endwin (NULL); */
    filterpid = mutt_create_filter_fd (DisplayFilter, &fpout, NULL, NULL,
				       -1, fileno(fpfilterout), -1);
    if (filterpid < 0)
    {
      mutt_error (_("Cannot create display filter"));
      safe_fclose (&fpfilterout);
      unlink (mutt_b2s (tempfile));
      goto cleanup;
    }
  }

  if (!Pager || mutt_strcmp (Pager, "builtin") == 0)
    builtin = 1;
  else
  {
    char buf[LONG_STRING];
    struct hdr_format_info hfi;

    hfi.ctx = Context;
    hfi.pager_progress = ExtPagerProgress;
    hfi.hdr = cur;
    mutt_make_string_info (buf, sizeof (buf), MuttIndexWindow->cols, NONULL(PagerFmt), &hfi, 0);
    fputs (buf, fpout);
    fputs ("\n\n", fpout);
  }

  res = mutt_copy_message (fpout, Context, cur, cmflags,
                           (option (OPTWEED) ? (CH_WEED | CH_REORDER) : 0) |
                           CH_DECODE | CH_FROM | CH_DISPLAY);
  if ((safe_fclose (&fpout) != 0 && errno != EPIPE) || res < 0)
  {
    mutt_error (_("Could not copy message"));
    if (fpfilterout != NULL)
    {
      mutt_wait_filter (filterpid);
      safe_fclose (&fpfilterout);
    }
    mutt_unlink (mutt_b2s (tempfile));
    goto cleanup;
  }

  if (fpfilterout != NULL && mutt_wait_filter (filterpid) != 0)
    mutt_any_key_to_continue (NULL);

  safe_fclose (&fpfilterout);	/* XXX - check result? */

  if (WithCrypto)
  {
    /* update crypto information for this message */
    cur->security &= ~(GOODSIGN|BADSIGN);
    cur->security |= crypt_query (cur->content);

    /* Remove color cache for this message, in case there
       are color patterns for both ~g and ~V */
    cur->pair = 0;

    /* Process protected headers and autocrypt gossip headers */
    process_protected_headers (cur);
  }

  if (builtin)
  {
    pager_t info;

    if (WithCrypto
        && (cur->security & APPLICATION_SMIME) && (cmflags & MUTT_CM_VERIFY))
    {
      if (cur->security & GOODSIGN)
      {
	if (!crypt_smime_verify_sender(cur))
	  mutt_message ( _("S/MIME signature successfully verified."));
	else
	  mutt_error ( _("S/MIME certificate owner does not match sender."));
      }
      else if (cur->security & PARTSIGN)
	mutt_message (_("Warning: Part of this message has not been signed."));
      else if (cur->security & SIGN || cur->security & BADSIGN)
	mutt_error ( _("S/MIME signature could NOT be verified."));
    }

    if (WithCrypto
        && (cur->security & APPLICATION_PGP) && (cmflags & MUTT_CM_VERIFY))
    {
      if (cur->security & GOODSIGN)
	mutt_message (_("PGP signature successfully verified."));
      else if (cur->security & PARTSIGN)
	mutt_message (_("Warning: Part of this message has not been signed."));
      else if (cur->security & SIGN)
	mutt_message (_("PGP signature could NOT be verified."));
    }

    /* Invoke the builtin pager */
    memset (&info, 0, sizeof (pager_t));
    info.hdr = cur;
    info.ctx = Context;
    rc = mutt_pager (NULL, mutt_b2s (tempfile), MUTT_PAGER_MESSAGE, &info);
  }
  else
  {
    int r;
    BUFFER *cmd = NULL;

    mutt_endwin (NULL);

    cmd = mutt_buffer_pool_get ();
    mutt_buffer_printf (cmd, "%s %s", NONULL(Pager), mutt_b2s (tempfile));
    if ((r = mutt_system (mutt_b2s (cmd))) == -1)
      mutt_error (_("Error running \"%s\"!"), mutt_b2s (cmd));
    unlink (mutt_b2s (tempfile));
    mutt_buffer_pool_release (&cmd);

    if (!option (OPTNOCURSES))
      keypad (stdscr, TRUE);
    if (r != -1)
      mutt_set_flag (Context, cur, MUTT_READ, 1);
    if (r != -1 && option (OPTPROMPTAFTER))
    {
      mutt_unget_event (mutt_any_key_to_continue _("Command: "), 0);
      rc = km_dokey (MENU_PAGER);
    }
    else
      rc = 0;
  }

cleanup:
  mutt_buffer_pool_release (&tempfile);
  return rc;
}

void ci_bounce_message (HEADER *h)
{
  char prompt[SHORT_STRING+1];
  char scratch[SHORT_STRING];
  char buf[HUGE_STRING] = { 0 };
  ADDRESS *adr = NULL;
  char *err = NULL;
  int rc;

  /* RfC 5322 mandates a From: header, so warn before bouncing
   * messages without one */
  if (h)
  {
    if (!h->env->from)
    {
      mutt_error _("Warning: message contains no From: header");
      mutt_sleep (2);
    }
  }
  else if (Context)
  {
    for (rc = 0; rc < Context->msgcount; rc++)
    {
      if (Context->hdrs[rc]->tagged && !Context->hdrs[rc]->env->from)
      {
	mutt_error _("Warning: message contains no From: header");
	mutt_sleep (2);
	break;
      }
    }
  }

  if (h)
    strfcpy(prompt, _("Bounce message to: "), sizeof(prompt));
  else
    strfcpy(prompt, _("Bounce tagged messages to: "), sizeof(prompt));

  rc = mutt_get_field (prompt, buf, sizeof (buf), MUTT_ALIAS);
  if (rc || !buf[0])
    return;

  if (!(adr = mutt_parse_adrlist (adr, buf)))
  {
    mutt_error _("Error parsing address!");
    return;
  }

  adr = mutt_expand_aliases (adr);

  if (mutt_addrlist_to_intl (adr, &err) < 0)
  {
    mutt_error (_("Bad IDN: '%s'"), err);
    FREE (&err);
    rfc822_free_address (&adr);
    return;
  }

  buf[0] = 0;
  rfc822_write_address (buf, sizeof (buf), adr, 1);

#define extra_space (15 + 7 + 2)
  snprintf (scratch, sizeof (scratch),
            (h ? _("Bounce message to %s") : _("Bounce messages to %s")), buf);

  if (mutt_strwidth (prompt) > MuttMessageWindow->cols - extra_space)
  {
    mutt_format_string (prompt, sizeof (prompt),
			0, MuttMessageWindow->cols-extra_space, FMT_LEFT, 0,
			scratch, sizeof (scratch), 0);
    safe_strcat (prompt, sizeof (prompt), "...?");
  }
  else
    snprintf (prompt, sizeof (prompt), "%s?", scratch);

  if (query_quadoption (OPT_BOUNCE, prompt) != MUTT_YES)
  {
    rfc822_free_address (&adr);
    mutt_window_clearline (MuttMessageWindow, 0);
    mutt_message (h ? _("Message not bounced.") : _("Messages not bounced."));
    return;
  }

  mutt_window_clearline (MuttMessageWindow, 0);

  rc = mutt_bounce_message (NULL, h, adr);
  rfc822_free_address (&adr);
  /* If no error, or background, display message. */
  if ((rc == 0) || (rc == S_BKG))
    mutt_message (h ? _("Message bounced.") : _("Messages bounced."));
}

static void pipe_set_flags (int decode, int print, int *cmflags, int *chflags)
{
  if (decode)
  {
    *chflags |= CH_DECODE | CH_REORDER;
    *cmflags |= MUTT_CM_DECODE | MUTT_CM_CHARCONV;

    if (option (OPTWEED))
    {
      *chflags |= CH_WEED;
      *cmflags |= MUTT_CM_WEED;
    }

    /* Just as with copy-decode, we need to update the
     * mime fields to avoid confusing programs that may
     * process the email.  However, we don't want to force
     * those fields to appear in printouts. */
    if (!print)
      *chflags |= CH_MIME | CH_TXTPLAIN;
  }

  if (print)
    *cmflags |= MUTT_CM_PRINTING;

}

static void pipe_msg (HEADER *h, FILE *fp, int decode, int print)
{
  int cmflags = 0;
  int chflags = CH_FROM;

  pipe_set_flags (decode, print, &cmflags, &chflags);

  if (WithCrypto && decode && h->security & ENCRYPT)
  {
    if (!crypt_valid_passphrase(h->security))
      return;
    endwin ();
  }

  if (decode)
    mutt_parse_mime_message (Context, h);

  mutt_copy_message (fp, Context, h, cmflags, chflags);
}


/* the following code is shared between printing and piping */

static int _mutt_pipe_message (HEADER *h, char *cmd,
			       int decode,
			       int print,
			       int split,
			       char *sep)
{

  int i, rc = 0;
  pid_t thepid;
  FILE *fpout;

/*   mutt_endwin (NULL);

     is this really needed here ?
     it makes the screen flicker on pgp and s/mime messages,
     before asking for a passphrase...
                                     Oliver Ehli */
  if (h)
  {

    mutt_message_hook (Context, h, MUTT_MESSAGEHOOK);

    if (WithCrypto && decode)
    {
      mutt_parse_mime_message (Context, h);
      if (h->security & ENCRYPT && !crypt_valid_passphrase(h->security))
	return 1;
    }
    mutt_endwin (NULL);

    if ((thepid = mutt_create_filter (cmd, &fpout, NULL, NULL)) < 0)
    {
      mutt_perror _("Can't create filter process");
      return 1;
    }

    set_option (OPTKEEPQUIET);
    pipe_msg (h, fpout, decode, print);
    safe_fclose (&fpout);
    rc = mutt_wait_filter (thepid);
    unset_option (OPTKEEPQUIET);
  }
  else
  { /* handle tagged messages */

    if (WithCrypto && decode)
    {
      for (i = 0; i < Context->vcount; i++)
	if (Context->hdrs[Context->v2r[i]]->tagged)
	{
	  mutt_message_hook (Context, Context->hdrs[Context->v2r[i]], MUTT_MESSAGEHOOK);
	  mutt_parse_mime_message(Context, Context->hdrs[Context->v2r[i]]);
	  if (Context->hdrs[Context->v2r[i]]->security & ENCRYPT &&
	      !crypt_valid_passphrase(Context->hdrs[Context->v2r[i]]->security))
	    return 1;
	}
    }

    if (split)
    {
      for (i = 0; i < Context->vcount; i++)
      {
        if (Context->hdrs[Context->v2r[i]]->tagged)
        {
	  mutt_message_hook (Context, Context->hdrs[Context->v2r[i]], MUTT_MESSAGEHOOK);
	  mutt_endwin (NULL);
	  if ((thepid = mutt_create_filter (cmd, &fpout, NULL, NULL)) < 0)
	  {
	    mutt_perror _("Can't create filter process");
	    return 1;
	  }
          set_option (OPTKEEPQUIET);
          pipe_msg (Context->hdrs[Context->v2r[i]], fpout, decode, print);
          /* add the message separator */
          if (sep)  fputs (sep, fpout);
	  safe_fclose (&fpout);
	  if (mutt_wait_filter (thepid) != 0)
	    rc = 1;
          unset_option (OPTKEEPQUIET);
        }
      }
    }
    else
    {
      mutt_endwin (NULL);
      if ((thepid = mutt_create_filter (cmd, &fpout, NULL, NULL)) < 0)
      {
	mutt_perror _("Can't create filter process");
	return 1;
      }
      set_option (OPTKEEPQUIET);
      for (i = 0; i < Context->vcount; i++)
      {
        if (Context->hdrs[Context->v2r[i]]->tagged)
        {
	  mutt_message_hook (Context, Context->hdrs[Context->v2r[i]], MUTT_MESSAGEHOOK);
          pipe_msg (Context->hdrs[Context->v2r[i]], fpout, decode, print);
          /* add the message separator */
          if (sep) fputs (sep, fpout);
        }
      }
      safe_fclose (&fpout);
      if (mutt_wait_filter (thepid) != 0)
	rc = 1;
      unset_option (OPTKEEPQUIET);
    }
  }

  if (rc || option (OPTWAITKEY))
    mutt_any_key_to_continue (NULL);
  return rc;
}

void mutt_pipe_message (HEADER *h)
{
  char buffer[LONG_STRING];

  buffer[0] = 0;
  if (mutt_get_field (_("Pipe to command: "), buffer, sizeof (buffer), MUTT_CMD)
      != 0 || !buffer[0])
    return;

  mutt_expand_path (buffer, sizeof (buffer));
  _mutt_pipe_message (h, buffer,
		      option (OPTPIPEDECODE),
		      0,
		      option (OPTPIPESPLIT),
		      PipeSep);
}

void mutt_print_message (HEADER *h)
{

  if (quadoption (OPT_PRINT) && !PrintCmd)
  {
    mutt_message (_("No printing command has been defined."));
    return;
  }

  if (query_quadoption (OPT_PRINT,
			h ? _("Print message?") : _("Print tagged messages?"))
      != MUTT_YES)
    return;

  if (_mutt_pipe_message (h, PrintCmd,
			  option (OPTPRINTDECODE),
			  1,
			  option (OPTPRINTSPLIT),
			  "\f") == 0)
    mutt_message (h ? _("Message printed") : _("Messages printed"));
  else
    mutt_message (h ? _("Message could not be printed") :
		  _("Messages could not be printed"));
}


int mutt_select_sort (int reverse)
{
  int method = Sort; /* save the current method in case of abort */

  switch (mutt_multi_choice (reverse ?
       /* L10N: The following three are the sort/reverse sort prompts.
        * Letters must match the order of the characters in the third
        * string.  Note that mutt now supports multiline prompts, so
        * it's okay for the translation to take up to three lines.
        */
	_("Rev-Sort Date/Frm/Recv/Subj/tO/Thread/Unsort/siZe/sCore/sPam/Label?: ") :
	_("Sort Date/Frm/Recv/Subj/tO/Thread/Unsort/siZe/sCore/sPam/Label?: "),
	_("dfrsotuzcpl")))
  {
    case -1: /* abort - don't resort */
      return -1;

    case 1: /* (d)ate */
      Sort = SORT_DATE;
      break;

    case 2: /* (f)rm */
      Sort = SORT_FROM;
      break;

    case 3: /* (r)ecv */
      Sort = SORT_RECEIVED;
      break;

    case 4: /* (s)ubj */
      Sort = SORT_SUBJECT;
      break;

    case 5: /* t(o) */
      Sort = SORT_TO;
      break;

    case 6: /* (t)hread */
      Sort = SORT_THREADS;
      break;

    case 7: /* (u)nsort */
      Sort = SORT_ORDER;
      break;

    case 8: /* si(z)e */
      Sort = SORT_SIZE;
      break;

    case 9: /* s(c)ore */
      Sort = SORT_SCORE;
      break;

    case 10: /* s(p)am */
      Sort = SORT_SPAM;
      break;

    case 11: /* (l)abel */
      Sort = SORT_LABEL;
      break;
  }
  if (reverse)
    Sort |= SORT_REVERSE;

  return (Sort != method ? 0 : -1); /* no need to resort if it's the same */
}

/* invoke a command in a subshell */
void mutt_shell_escape (void)
{
  char buf[LONG_STRING];

  buf[0] = 0;
  if (mutt_get_field (_("Shell command: "), buf, sizeof (buf), MUTT_CMD) == 0)
  {
    if (!buf[0] && Shell)
      strfcpy (buf, Shell, sizeof (buf));
    if (buf[0])
    {
      mutt_window_clearline (MuttMessageWindow, 0);
      mutt_endwin (NULL);
      fflush (stdout);
      if (mutt_system (buf) != 0 || option (OPTWAITKEY))
	mutt_any_key_to_continue (NULL);
    }
  }
}

/* enter a mutt command */
void mutt_enter_command (void)
{
  BUFFER err, token;
  char buffer[LONG_STRING];
  int r;

  buffer[0] = 0;
  if (mutt_get_field (":", buffer, sizeof (buffer), MUTT_COMMAND) != 0 || !buffer[0])
    return;
  mutt_buffer_init (&err);
  err.dsize = STRING;
  err.data = safe_malloc(err.dsize);
  mutt_buffer_init (&token);
  r = mutt_parse_rc_line (buffer, &token, &err);
  FREE (&token.data);
  if (err.data[0])
  {
    /* since errbuf could potentially contain printf() sequences in it,
       we must call mutt_error() in this fashion so that vsprintf()
       doesn't expect more arguments that we passed */
    if (r == 0)
      mutt_message ("%s", err.data);
    else
      mutt_error ("%s", err.data);
  }

  FREE (&err.data);
}

void mutt_display_address (ENVELOPE *env)
{
  char *pfx = NULL;
  char buf[SHORT_STRING];
  ADDRESS *adr = NULL;

  adr = mutt_get_address (env, &pfx);

  if (!adr) return;

  /*
   * Note: We don't convert IDNA to local representation this time.
   * That is intentional, so the user has an opportunity to copy &
   * paste the on-the-wire form of the address to other, IDN-unable
   * software.
   */

  buf[0] = 0;
  rfc822_write_address (buf, sizeof (buf), adr, 0);
  mutt_message ("%s: %s", pfx, buf);
}

static void set_copy_flags (HEADER *hdr, int decode, int decrypt, int *cmflags, int *chflags)
{
  *cmflags = 0;
  *chflags = CH_UPDATE_LEN;

  if (WithCrypto && !decode && decrypt && (hdr->security & ENCRYPT))
  {
    if ((WithCrypto & APPLICATION_PGP)
        && mutt_is_multipart_encrypted(hdr->content))
    {
      *chflags = CH_NONEWLINE | CH_XMIT | CH_MIME;
      *cmflags = MUTT_CM_DECODE_PGP;
    }
    else if ((WithCrypto & APPLICATION_PGP)
             && mutt_is_application_pgp (hdr->content) & ENCRYPT)
      decode = 1;
    else if ((WithCrypto & APPLICATION_SMIME)
             && mutt_is_application_smime(hdr->content) & ENCRYPT)
    {
      *chflags = CH_NONEWLINE | CH_XMIT | CH_MIME;
      *cmflags = MUTT_CM_DECODE_SMIME;
    }
  }

  if (decode)
  {
    *chflags = CH_XMIT | CH_MIME | CH_TXTPLAIN;
    *cmflags = MUTT_CM_DECODE | MUTT_CM_CHARCONV;

    if (!decrypt)	/* If decode doesn't kick in for decrypt, */
    {
      *chflags |= CH_DECODE;	/* then decode RFC 2047 headers, */

      if (option (OPTWEED))
      {
	*chflags |= CH_WEED;	/* and respect $weed. */
	*cmflags |= MUTT_CM_WEED;
      }
    }
  }
}

int _mutt_save_message (HEADER *h, CONTEXT *ctx, int delete, int decode, int decrypt)
{
  int cmflags, chflags;
  int rc;

  set_copy_flags (h, decode, decrypt, &cmflags, &chflags);

  if (decode || decrypt)
    mutt_parse_mime_message (Context, h);

  if ((rc = mutt_append_message (ctx, Context, h, cmflags, chflags)) != 0)
    return rc;

  if (delete)
  {
    mutt_set_flag (Context, h, MUTT_DELETE, 1);
    mutt_set_flag (Context, h, MUTT_PURGE, 1);
    if (option (OPTDELETEUNTAG))
      mutt_set_flag (Context, h, MUTT_TAG, 0);
  }

  return 0;
}

/* returns 0 if the copy/save was successful, or -1 on error/abort */
int mutt_save_message (HEADER *h, int delete, int decode, int decrypt)
{
  int i, need_buffy_cleanup;
  int need_passphrase = 0, app=0;
  int rc = -1;
  char prompt[SHORT_STRING];
  BUFFER *buf = NULL;
  CONTEXT ctx;
  struct stat st;

  buf = mutt_buffer_pool_get ();

  snprintf (prompt, sizeof (prompt),
	    decode  ? (delete ? _("Decode-save%s to mailbox") :
		       _("Decode-copy%s to mailbox")) :
	    (decrypt ? (delete ? _("Decrypt-save%s to mailbox") :
			_("Decrypt-copy%s to mailbox")) :
	     (delete ? _("Save%s to mailbox") : _("Copy%s to mailbox"))),
	    h ? "" : _(" tagged"));


  if (h)
  {
    if (WithCrypto)
    {
      need_passphrase = h->security & ENCRYPT;
      app = h->security;
    }
    mutt_message_hook (Context, h, MUTT_MESSAGEHOOK);
    mutt_default_save (buf->data, buf->dsize, h);
    mutt_buffer_fix_dptr (buf);
  }
  else
  {
    /* look for the first tagged message */

    for (i = 0; i < Context->vcount; i++)
    {
      if (Context->hdrs[Context->v2r[i]]->tagged)
      {
	h = Context->hdrs[Context->v2r[i]];
	break;
      }
    }


    if (h)
    {
      mutt_message_hook (Context, h, MUTT_MESSAGEHOOK);
      mutt_default_save (buf->data, buf->dsize, h);
      mutt_buffer_fix_dptr (buf);
      if (WithCrypto)
      {
        need_passphrase = h->security & ENCRYPT;
        app = h->security;
      }
      h = NULL;
    }
  }

  mutt_buffer_pretty_mailbox (buf);
  if (mutt_buffer_enter_fname (prompt, buf, 0) == -1)
    goto cleanup;
  if (!mutt_buffer_len (buf))
    goto cleanup;

  /* This is an undocumented feature of ELM pointed out to me by Felix von
   * Leitner <[e-mail]>
   */
  if (mutt_strcmp (mutt_b2s (buf), ".") == 0)
    mutt_buffer_strcpy (buf, LastSaveFolder);
  else
    strfcpy (LastSaveFolder, mutt_b2s (buf), sizeof (LastSaveFolder));

  mutt_buffer_expand_path (buf);

  /* check to make sure that this file is really the one the user wants */
  if (mutt_save_confirm (mutt_b2s (buf), &st) != 0)
    goto cleanup;

  if (WithCrypto && need_passphrase && (decode || decrypt)
      && !crypt_valid_passphrase(app))
    goto cleanup;

  mutt_message (_("Copying to %s..."), mutt_b2s (buf));

#ifdef USE_IMAP
  if (Context->magic == MUTT_IMAP &&
      !(decode || decrypt) && mx_is_imap (mutt_b2s (buf)))
  {
    switch (imap_copy_messages (Context, h, mutt_b2s (buf), delete))
    {
      /* success */
      case 0:
        mutt_clear_error ();
        rc = 0;
        goto cleanup;
      /* non-fatal error: fall through to fetch/append */
      case 1:
        break;
      /* fatal error, abort */
      case -1:
        goto cleanup;
    }
  }
#endif

  if (mx_open_mailbox (mutt_b2s (buf), MUTT_APPEND, &ctx) != NULL)
  {
    if (h)
    {
      if (_mutt_save_message(h, &ctx, delete, decode, decrypt) != 0)
      {
        mx_close_mailbox (&ctx, NULL);
        goto cleanup;
      }
    }
    else
    {
      for (i = 0; i < Context->vcount; i++)
      {
	if (Context->hdrs[Context->v2r[i]]->tagged)
	{
	  mutt_message_hook (Context, Context->hdrs[Context->v2r[i]], MUTT_MESSAGEHOOK);
	  if (_mutt_save_message(Context->hdrs[Context->v2r[i]],
                                 &ctx, delete, decode, decrypt) != 0)
          {
            mx_close_mailbox (&ctx, NULL);
            goto cleanup;
          }
	}
      }
    }

    need_buffy_cleanup = (ctx.magic == MUTT_MBOX || ctx.magic == MUTT_MMDF);

    mx_close_mailbox (&ctx, NULL);

    if (need_buffy_cleanup)
      mutt_buffy_cleanup (mutt_b2s (buf), &st);

    mutt_clear_error ();
    rc = 0;
  }

cleanup:
  mutt_buffer_pool_release (&buf);
  return rc;
}


void mutt_version (void)
{
  mutt_message ("Mutt %s (%s)", MUTT_VERSION, ReleaseDate);
}

/*
 * Returns:
 *   1 when a structural change is made.
 *     recvattach requires this to know when to regenerate the actx.
 *   0 otherwise.
 */
int mutt_edit_content_type (HEADER *h, BODY *b, FILE *fp)
{
  char buf[LONG_STRING];
  char obuf[LONG_STRING];
  char tmp[STRING];
  PARAMETER *p;

  char charset[STRING];
  char *cp;

  short charset_changed = 0;
  short type_changed = 0;
  short structure_changed = 0;

  cp = mutt_get_parameter ("charset", b->parameter);
  strfcpy (charset, NONULL (cp), sizeof (charset));

  snprintf (buf, sizeof (buf), "%s/%s", TYPE (b), b->subtype);
  strfcpy (obuf, buf, sizeof (obuf));
  if (b->parameter)
  {
    size_t l;

    for (p = b->parameter; p; p = p->next)
    {
      l = strlen (buf);

      rfc822_cat (tmp, sizeof (tmp), p->value, MimeSpecials);
      snprintf (buf + l, sizeof (buf) - l, "; %s=%s", p->attribute, tmp);
    }
  }

  if (mutt_get_field ("Content-Type: ", buf, sizeof (buf), 0) != 0 ||
      buf[0] == 0)
    return 0;

  /* clean up previous junk */
  mutt_free_parameter (&b->parameter);
  FREE (&b->subtype);

  mutt_parse_content_type (buf, b);


  snprintf (tmp, sizeof (tmp), "%s/%s", TYPE (b), NONULL (b->subtype));
  type_changed = ascii_strcasecmp (tmp, obuf);
  charset_changed = ascii_strcasecmp (charset, mutt_get_parameter ("charset", b->parameter));

  /* if in send mode, check for conversion - current setting is default. */

  if (!h && b->type == TYPETEXT && charset_changed)
  {
    int r;
    snprintf (tmp, sizeof (tmp), _("Convert to %s upon sending?"),
	      mutt_get_parameter ("charset", b->parameter));
    if ((r = mutt_yesorno (tmp, !b->noconv)) != -1)
      b->noconv = (r == MUTT_NO);
  }

  /* inform the user */

  snprintf (tmp, sizeof (tmp), "%s/%s", TYPE (b), NONULL (b->subtype));
  if (type_changed)
    mutt_message (_("Content-Type changed to %s."), tmp);
  if (b->type == TYPETEXT && charset_changed)
  {
    if (type_changed)
      mutt_sleep (1);
    mutt_message (_("Character set changed to %s; %s."),
		  mutt_get_parameter ("charset", b->parameter),
		  b->noconv ? _("not converting") : _("converting"));
  }

  b->force_charset |= charset_changed ? 1 : 0;

  if (!is_multipart (b) && b->parts)
  {
    structure_changed = 1;
    mutt_free_body (&b->parts);
  }
  if (!mutt_is_message_type (b->type, b->subtype) && b->hdr)
  {
    structure_changed = 1;
    b->hdr->content = NULL;
    mutt_free_header (&b->hdr);
  }

  if (fp && !b->parts && (is_multipart (b) || mutt_is_message_type (b->type, b->subtype)))
  {
    structure_changed = 1;
    mutt_parse_part (fp, b);
  }

  if (WithCrypto && h)
  {
    if (h->content == b)
      h->security  = 0;

    h->security |= crypt_query (b);
  }

  return structure_changed;
}


static int _mutt_check_traditional_pgp (HEADER *h, int *redraw)
{
  MESSAGE *msg;
  int rv = 0;

  h->security |= PGP_TRADITIONAL_CHECKED;

  mutt_parse_mime_message (Context, h);
  if ((msg = mx_open_message (Context, h->msgno)) == NULL)
    return 0;
  if (crypt_pgp_check_traditional (msg->fp, h->content, 0))
  {
    h->security = crypt_query (h->content);
    *redraw |= REDRAW_FULL;
    rv = 1;
  }

  h->security |= PGP_TRADITIONAL_CHECKED;
  mx_close_message (Context, &msg);
  return rv;
}

int mutt_check_traditional_pgp (HEADER *h, int *redraw)
{
  int i;
  int rv = 0;
  if (h && !(h->security & PGP_TRADITIONAL_CHECKED))
    rv = _mutt_check_traditional_pgp (h, redraw);
  else
  {
    for (i = 0; i < Context->vcount; i++)
      if (Context->hdrs[Context->v2r[i]]->tagged &&
	  !(Context->hdrs[Context->v2r[i]]->security & PGP_TRADITIONAL_CHECKED))
	rv = _mutt_check_traditional_pgp (Context->hdrs[Context->v2r[i]], redraw)
	  || rv;
  }
  return rv;
}

void mutt_check_stats (void)
{
  mutt_buffy_check (MUTT_BUFFY_CHECK_FORCE | MUTT_BUFFY_CHECK_FORCE_STATS);
}