copy.c 24.1 KB
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/*
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 * Copyright (C) 1996-2000,2002,2014 Michael R. Elkins <me@mutt.org>
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 * 
 *     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
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#include "mutt.h"
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#include "mailbox.h"
#include "mx.h"
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#include "copy.h"
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#include "rfc2047.h"
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#include "mime.h"
#include "mutt_crypt.h"
#include "mutt_idna.h"
#include "mutt_curses.h"

#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <unistd.h> /* needed for SEEK_SET under SunOS 4.1.4 */
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static int address_header_decode (char **str);
static int copy_delete_attach (BODY *b, FILE *fpin, FILE *fpout, char *date);
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/* Ok, the only reason for not merging this with mutt_copy_header()
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 * below is to avoid creating a HEADER structure in message_handler().
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 * Also, this one will wrap headers much more aggressively than the other one.
 */
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int
mutt_copy_hdr (FILE *in, FILE *out, LOFF_T off_start, LOFF_T off_end, int flags,
	       const char *prefix)
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{
  int from = 0;
  int this_is_from;
  int ignore = 0;
  char buf[LONG_STRING]; /* should be long enough to get most fields in one pass */
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  char *nl;
  LIST *t;
  char **headers;
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  int hdr_count;
  int x;
  char *this_one = NULL;
  size_t this_one_len = 0;
  int error;

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  if (ftello (in) != off_start)
    fseeko (in, off_start, 0);
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  buf[0] = '\n';
  buf[1] = 0;

  if ((flags & (CH_REORDER | CH_WEED | CH_MIME | CH_DECODE | CH_PREFIX | CH_WEED_DELIVERED)) == 0)
  {
    /* Without these flags to complicate things
     * we can do a more efficient line to line copying
     */
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    while (ftello (in) < off_end)
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    {
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      nl = strchr (buf, '\n');
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      if ((fgets (buf, sizeof (buf), in)) == NULL)
	break;
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      /* Is it the beginning of a header? */
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      if (nl && buf[0] != ' ' && buf[0] != '\t')
      {
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	ignore = 1;
	if (!from && mutt_strncmp ("From ", buf, 5) == 0)
	{
	  if ((flags & CH_FROM) == 0)
	    continue;
	  from = 1;
	}
	else if (flags & (CH_NOQFROM) &&
			ascii_strncasecmp (">From ", buf, 6) == 0)
		continue;

	else if (buf[0] == '\n' || (buf[0] == '\r' && buf[1] == '\n'))
	  break; /* end of header */

	if ((flags & (CH_UPDATE | CH_XMIT | CH_NOSTATUS)) &&
	    (ascii_strncasecmp ("Status:", buf, 7) == 0 ||
	     ascii_strncasecmp ("X-Status:", buf, 9) == 0))
	  continue;
	if ((flags & (CH_UPDATE_LEN | CH_XMIT | CH_NOLEN)) &&
	    (ascii_strncasecmp ("Content-Length:", buf, 15) == 0 ||
	     ascii_strncasecmp ("Lines:", buf, 6) == 0))
	  continue;
	if ((flags & CH_UPDATE_REFS) &&
	    ascii_strncasecmp ("References:", buf, 11) == 0)
	  continue;
	if ((flags & CH_UPDATE_IRT) &&
	    ascii_strncasecmp ("In-Reply-To:", buf, 12) == 0)
	  continue;
        if (flags & CH_UPDATE_LABEL &&
            ascii_strncasecmp ("X-Label:", buf, 8) == 0)
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          continue;

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	ignore = 0;
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      }

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      if (!ignore && fputs (buf, out) == EOF)
	return (-1);
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    }
    return 0;
  }

  hdr_count = 1;
  x = 0;
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  error = FALSE;
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  /* We are going to read and collect the headers in an array
   * so we are able to do re-ordering.
   * First count the number of entries in the array
   */
  if (flags & CH_REORDER)
  {
    for (t = HeaderOrderList; t; t = t->next)
    {
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      dprint(3, (debugfile, "Reorder list: %s\n", t->data));
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      hdr_count++;
    }
  }

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  dprint (1, (debugfile, "WEED is %s\n", (flags & CH_WEED) ? "Set" : "Not"));
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  headers = safe_calloc (hdr_count, sizeof (char *));
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  /* Read all the headers into the array */
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  while (ftello (in) < off_end)
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  {
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    nl = strchr (buf, '\n');
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    /* Read a line */
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    if ((fgets (buf, sizeof (buf), in)) == NULL)
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      break;

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    /* Is it the beginning of a header? */
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    if (nl && buf[0] != ' ' && buf[0] != '\t')
    {
      /* Do we have anything pending? */
      if (this_one)
      {
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	if (flags & CH_DECODE) 
	{
	  if (!address_header_decode (&this_one))
	    rfc2047_decode (&this_one);
	  this_one_len = mutt_strlen (this_one);
	}

	if (!headers[x])
	  headers[x] = this_one;
	else 
	{
	  int hlen = mutt_strlen (headers[x]);

	  safe_realloc (&headers[x], hlen + this_one_len + sizeof (char));
	  strcat (headers[x] + hlen, this_one); /* __STRCAT_CHECKED__ */
	  FREE (&this_one);
	}

	this_one = NULL;
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      }

      ignore = 1;
      this_is_from = 0;
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      if (!from && mutt_strncmp ("From ", buf, 5) == 0)
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      {
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	if ((flags & CH_FROM) == 0)
	  continue;
	this_is_from = from = 1;
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      }
      else if (buf[0] == '\n' || (buf[0] == '\r' && buf[1] == '\n'))
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	break; /* end of header */
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      /* note: CH_FROM takes precedence over header weeding. */
      if (!((flags & CH_FROM) && (flags & CH_FORCE_FROM) && this_is_from) &&
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	  (flags & CH_WEED) &&
	  mutt_matches_ignore (buf, Ignore) &&
	  !mutt_matches_ignore (buf, UnIgnore))
	continue;
      if ((flags & CH_WEED_DELIVERED) &&
	  ascii_strncasecmp ("Delivered-To:", buf, 13) == 0)
	continue;
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      if ((flags & (CH_UPDATE | CH_XMIT | CH_NOSTATUS)) &&
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	  (ascii_strncasecmp ("Status:", buf, 7) == 0 ||
	   ascii_strncasecmp ("X-Status:", buf, 9) == 0))
	continue;
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      if ((flags & (CH_UPDATE_LEN | CH_XMIT | CH_NOLEN)) &&
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	  (ascii_strncasecmp ("Content-Length:", buf, 15) == 0 ||
	   ascii_strncasecmp ("Lines:", buf, 6) == 0))
	continue;
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      if ((flags & CH_MIME) &&
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	  ((ascii_strncasecmp ("content-", buf, 8) == 0 &&
	    (ascii_strncasecmp ("transfer-encoding:", buf + 8, 18) == 0 ||
	     ascii_strncasecmp ("type:", buf + 8, 5) == 0)) ||
	   ascii_strncasecmp ("mime-version:", buf, 13) == 0))
	continue;
      if ((flags & CH_UPDATE_REFS) &&
	  ascii_strncasecmp ("References:", buf, 11) == 0)
	continue;
      if ((flags & CH_UPDATE_IRT) &&
	  ascii_strncasecmp ("In-Reply-To:", buf, 12) == 0)
	continue;
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      /* Find x -- the array entry where this header is to be saved */
      if (flags & CH_REORDER)
      {
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	for (t = HeaderOrderList, x = 0 ; (t) ; t = t->next, x++)
	{
	  if (!ascii_strncasecmp (buf, t->data, mutt_strlen (t->data)))
	  {
	    dprint(2, (debugfile, "Reorder: %s matches %s\n", t->data, buf));
	    break;
	  }
	}
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      }

      ignore = 0;
    } /* If beginning of header */

    if (!ignore)
    {
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      dprint (2, (debugfile, "Reorder: x = %d; hdr_count = %d\n", x, hdr_count));
      if (!this_one) {
	this_one = safe_strdup (buf);
	this_one_len = mutt_strlen (this_one);
      } else {
	int blen = mutt_strlen (buf);

	safe_realloc (&this_one, this_one_len + blen + sizeof (char));
	strcat (this_one + this_one_len, buf); /* __STRCAT_CHECKED__ */
	this_one_len += blen;
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      }
    }
  } /* while (ftello (in) < off_end) */

  /* Do we have anything pending?  -- XXX, same code as in above in the loop. */
  if (this_one)
  {
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    if (flags & CH_DECODE) 
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    {
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      if (!address_header_decode (&this_one))
	rfc2047_decode (&this_one);
      this_one_len = mutt_strlen (this_one);
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    }
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    if (!headers[x])
      headers[x] = this_one;
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    else 
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    {
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      int hlen = mutt_strlen (headers[x]);
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      safe_realloc (&headers[x], hlen + this_one_len + sizeof (char));
      strcat (headers[x] + hlen, this_one); /* __STRCAT_CHECKED__ */
      FREE (&this_one);
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    }

    this_one = NULL;
  }

  /* Now output the headers in order */
  for (x = 0; x < hdr_count; x++)
  {
    if (headers[x])
    {
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#if 0
      if (flags & CH_DECODE)
	rfc2047_decode (&headers[x]);
#endif

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      /* We couldn't do the prefixing when reading because RFC 2047
       * decoding may have concatenated lines.
       */
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      if (flags & (CH_DECODE|CH_PREFIX))
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      {
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	if (mutt_write_one_header (out, 0, headers[x], 
				   flags & CH_PREFIX ? prefix : 0,
                                   mutt_window_wrap_cols (MuttIndexWindow, Wrap), flags) == -1)
	{
	  error = TRUE;
	  break;
	}
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      }
      else
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      {      
	if (fputs (headers[x], out) == EOF)
	{
	  error = TRUE;
	  break;
	}
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      }
    }
  }

  /* Free in a separate loop to be sure that all headers are freed
   * in case of error. */
  for (x = 0; x < hdr_count; x++)
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    FREE (&headers[x]);
  FREE (&headers);
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  if (error)
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    return (-1);
  return (0);
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}

/* flags
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 	CH_DECODE	RFC2047 header decoding
 	CH_FROM		retain the "From " message separator
        CH_FORCE_FROM	give CH_FROM precedence over CH_WEED
 	CH_MIME		ignore MIME fields
	CH_NOLEN	don't write Content-Length: and Lines:
 	CH_NONEWLINE	don't output a newline after the header
 	CH_NOSTATUS	ignore the Status: and X-Status:
 	CH_PREFIX	quote header with $indent_str
 	CH_REORDER	output header in order specified by `hdr_order'
  	CH_TXTPLAIN	generate text/plain MIME headers [hack alert.]
 	CH_UPDATE	write new Status: and X-Status:
 	CH_UPDATE_LEN	write new Content-Length: and Lines:
 	CH_XMIT		ignore Lines: and Content-Length:
 	CH_WEED		do header weeding
	CH_NOQFROM      ignore ">From " line
	CH_UPDATE_IRT	update the In-Reply-To: header
	CH_UPDATE_REFS	update the References: header
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   prefix
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   	string to use if CH_PREFIX is set
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 */
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int
mutt_copy_header (FILE *in, HEADER *h, FILE *out, int flags, const char *prefix)
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{
  char buffer[SHORT_STRING];

  if (h->env)
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    flags |= (h->env->irt_changed ? CH_UPDATE_IRT : 0)
      | (h->env->refs_changed ? CH_UPDATE_REFS : 0);
  
  if (mutt_copy_hdr (in, out, h->offset, h->content->offset, flags, prefix) == -1)
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    return -1;
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  if (flags & CH_TXTPLAIN)
  {
    char chsbuf[SHORT_STRING];
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    fputs ("MIME-Version: 1.0\n", out);
    fputs ("Content-Transfer-Encoding: 8bit\n", out);
    fputs ("Content-Type: text/plain; charset=", out);
    mutt_canonical_charset (chsbuf, sizeof (chsbuf), Charset ? Charset : "us-ascii");
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    rfc822_cat(buffer, sizeof(buffer), chsbuf, MimeSpecials);
    fputs(buffer, out);
    fputc('\n', out);
  }

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  if ((flags & CH_UPDATE_IRT) && h->env->in_reply_to)
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  {
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    LIST *listp = h->env->in_reply_to;
    fputs ("In-Reply-To:", out);
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    for (; listp; listp = listp->next)
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    {
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      fputc (' ', out);
      fputs (listp->data, out);
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    }
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    fputc ('\n', out);
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  }
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  if ((flags & CH_UPDATE_REFS) && h->env->references)
  {
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    fputs ("References:", out);
    mutt_write_references (h->env->references, out, 0);
    fputc ('\n', out);
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  }
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  if ((flags & CH_UPDATE) && (flags & CH_NOSTATUS) == 0)
  {
    if (h->old || h->read)
    {
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      fputs ("Status: ", out);
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      if (h->read)
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	fputs ("RO", out);
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      else if (h->old)
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	fputc ('O', out);
      fputc ('\n', out);
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    }
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    if (h->flagged || h->replied)
    {
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      fputs ("X-Status: ", out);
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      if (h->replied)
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	fputc ('A', out);
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      if (h->flagged)
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	fputc ('F', out);
      fputc ('\n', out);
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    }
  }

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  if (flags & CH_UPDATE_LEN &&
      (flags & CH_NOLEN) == 0)
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  {
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    fprintf (out, "Content-Length: " OFF_T_FMT "\n", h->content->length);
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    if (h->lines != 0 || h->content->length == 0)
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      fprintf (out, "Lines: %d\n", h->lines);
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  }

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  if (flags & CH_UPDATE_LABEL)
  {
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    h->xlabel_changed = 0;
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    if (h->env->x_label != NULL)
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      if (fprintf(out, "X-Label: %s\n", h->env->x_label) !=
		  10 + strlen(h->env->x_label))
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        return -1;
  }

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  if ((flags & CH_NONEWLINE) == 0)
  {
    if (flags & CH_PREFIX)
      fputs(prefix, out);
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    fputc ('\n', out); /* add header terminator */
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  }

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  if (ferror (out) || feof (out))
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    return -1;
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  return 0;
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}

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/* Count the number of lines and bytes to be deleted in this body*/
static int count_delete_lines (FILE *fp, BODY *b, LOFF_T *length, size_t datelen)
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{
  int dellines = 0;
  long l;
  int ch;

  if (b->deleted)
  {
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    fseeko (fp, b->offset, SEEK_SET);
    for (l = b->length ; l ; l --)
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    {
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      ch = getc (fp);
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      if (ch == EOF)
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	break;
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      if (ch == '\n')
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	dellines ++;
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    }
    dellines -= 3;
    *length -= b->length - (84 + datelen);
    /* Count the number of digits exceeding the first one to write the size */
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    for (l = 10 ; b->length >= l ; l *= 10)
      (*length) ++;
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  }
  else
  {
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    for (b = b->parts ; b ; b = b->next)
      dellines += count_delete_lines (fp, b, length, datelen);
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  }
  return dellines;
}

/* make a copy of a message
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 * 
 * fpout	where to write output
 * fpin		where to get input
 * hdr		header of message being copied
 * body		structure of message being copied
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 * flags
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 * 	MUTT_CM_NOHEADER	don't copy header
 * 	MUTT_CM_PREFIX	quote header and body
 *	MUTT_CM_DECODE	decode message body to text/plain
 *	MUTT_CM_DISPLAY	displaying output to the user
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 *      MUTT_CM_PRINTING   printing the message
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 *	MUTT_CM_UPDATE	update structures in memory after syncing
 *	MUTT_CM_DECODE_PGP	used for decoding PGP messages
 *	MUTT_CM_CHARCONV	perform character set conversion 
 * chflags	flags to mutt_copy_header()
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 */
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int
_mutt_copy_message (FILE *fpout, FILE *fpin, HEADER *hdr, BODY *body,
		    int flags, int chflags)
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{
  char prefix[SHORT_STRING];
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  STATE s;
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  LOFF_T new_offset = -1;
  int rc = 0;

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  if (flags & MUTT_CM_PREFIX)
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  {
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    if (option (OPTTEXTFLOWED))
      strfcpy (prefix, ">", sizeof (prefix));
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    else
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      _mutt_make_string (prefix, sizeof (prefix), NONULL (Prefix), Context, hdr, 0);
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  }

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  if (hdr->xlabel_changed)
    chflags |= CH_UPDATE_LABEL;

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  if ((flags & MUTT_CM_NOHEADER) == 0)
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  {
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    if (flags & MUTT_CM_PREFIX)
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      chflags |= CH_PREFIX;

    else if (hdr->attach_del && (chflags & CH_UPDATE_LEN))
    {
      int new_lines;
      LOFF_T new_length = body->length;
      char date[SHORT_STRING];

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      mutt_make_date (date, sizeof (date));
      date[5] = date[mutt_strlen (date) - 1] = '\"';
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      /* Count the number of lines and bytes to be deleted */
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      fseeko (fpin, body->offset, SEEK_SET);
      new_lines = hdr->lines -
	count_delete_lines (fpin, body, &new_length, mutt_strlen (date));
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      /* Copy the headers */
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      if (mutt_copy_header (fpin, hdr, fpout,
			    chflags | CH_NOLEN | CH_NONEWLINE, NULL))
	return -1;
      fprintf (fpout, "Content-Length: " OFF_T_FMT "\n", new_length);
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      if (new_lines <= 0)
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	new_lines = 0;
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      else
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	fprintf (fpout, "Lines: %d\n", new_lines);
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      putc ('\n', fpout);
      if (ferror (fpout) || feof (fpout))
	return -1;
      new_offset = ftello (fpout);
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      /* Copy the body */
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      fseeko (fpin, body->offset, SEEK_SET);
      if (copy_delete_attach (body, fpin, fpout, date))
	return -1;
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#ifdef DEBUG
      {
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	LOFF_T fail = ((ftello (fpout) - new_offset) - new_length);

	if (fail)
	{
	  mutt_error ("The length calculation was wrong by %ld bytes", fail);
	  new_length += fail;
	  mutt_sleep (1);
	}
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      }
#endif

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      /* Update original message if we are sync'ing a mailfolder */ 
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      if (flags & MUTT_CM_UPDATE)
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      {
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	hdr->attach_del = 0;
	hdr->lines = new_lines;
	body->offset = new_offset;

	/* update the total size of the mailbox to reflect this deletion */
	Context->size -= body->length - new_length;
	/*
	 * if the message is visible, update the visible size of the mailbox
	 * as well.
	 */
	if (Context->v2r[hdr->msgno] != -1)
	  Context->vsize -= body->length - new_length;

	body->length = new_length;
	mutt_free_body (&body->parts);
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      }

      return 0;
    }

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    if (mutt_copy_header (fpin, hdr, fpout, chflags,
			  (chflags & CH_PREFIX) ? prefix : NULL) == -1)
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      return -1;

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    new_offset = ftello (fpout);
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  }

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  if (flags & MUTT_CM_DECODE)
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  {
    /* now make a text/plain version of the message */
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    memset (&s, 0, sizeof (STATE));
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    s.fpin = fpin;
    s.fpout = fpout;
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    if (flags & MUTT_CM_PREFIX)
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      s.prefix = prefix;
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    if (flags & MUTT_CM_DISPLAY)
      s.flags |= MUTT_DISPLAY;
    if (flags & MUTT_CM_PRINTING)
      s.flags |= MUTT_PRINTING;
    if (flags & MUTT_CM_WEED)
      s.flags |= MUTT_WEED;
    if (flags & MUTT_CM_CHARCONV)
      s.flags |= MUTT_CHARCONV;
    if (flags & MUTT_CM_REPLYING)
      s.flags |= MUTT_REPLYING;
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    if (WithCrypto && flags & MUTT_CM_VERIFY)
      s.flags |= MUTT_VERIFY;
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    rc = mutt_body_handler (body, &s);
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  }
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  else if (WithCrypto
           && (flags & MUTT_CM_DECODE_CRYPT) && (hdr->security & ENCRYPT))
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  {
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    BODY *cur = NULL;
    FILE *fp;
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    if ((WithCrypto & APPLICATION_PGP)
        && (flags & MUTT_CM_DECODE_PGP) && (hdr->security & APPLICATION_PGP) &&
	hdr->content->type == TYPEMULTIPART)
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    {
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      if (crypt_pgp_decrypt_mime (fpin, &fp, hdr->content, &cur))
	return (-1);
      fputs ("MIME-Version: 1.0\n", fpout);
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    }

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    if ((WithCrypto & APPLICATION_SMIME)
        && (flags & MUTT_CM_DECODE_SMIME) && (hdr->security & APPLICATION_SMIME)
	     && hdr->content->type == TYPEAPPLICATION)
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    {
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      if (crypt_smime_decrypt_mime (fpin, &fp, hdr->content, &cur))
	return (-1);
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    }

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    if (!cur)
    {
644
      mutt_error (_("No decryption engine available for message"));
645 646 647
      return -1;
    }

648 649
    mutt_write_mime_header (cur, fpout);
    fputc ('\n', fpout);
650

651 652
    fseeko (fp, cur->offset, 0);
    if (mutt_copy_bytes (fp, fpout, cur->length) == -1)
653
    {
654 655 656
      safe_fclose (&fp);
      mutt_free_body (&cur);
      return (-1);
657
    }
658 659
    mutt_free_body (&cur);
    safe_fclose (&fp);
660 661 662
  }
  else
  {
663
    fseeko (fpin, body->offset, 0);
664
    if (flags & MUTT_CM_PREFIX)
665 666 667
    {
      int c;
      size_t bytes = body->length;
668
      
669
      fputs(prefix, fpout);
670 671
      
      while((c = fgetc(fpin)) != EOF && bytes--)
672
      {
673 674 675 676 677 678
	fputc(c, fpout);
	if(c == '\n')
	{
	  fputs(prefix, fpout);
	}
      } 
679
    }
680
    else if (mutt_copy_bytes (fpin, fpout, body->length) == -1)
681 682 683
      return -1;
  }

684 685
  if ((flags & MUTT_CM_UPDATE) && (flags & MUTT_CM_NOHEADER) == 0 
      && new_offset != -1)
686 687
  {
    body->offset = new_offset;
688
    mutt_free_body (&body->parts);
689 690 691 692 693
  }

  return rc;
}

694 695
/* should be made to return -1 on fatal errors, and 1 on non-fatal errors
 * like partial decode, where it is worth displaying as much as possible */
696 697 698
int
mutt_copy_message (FILE *fpout, CONTEXT *src, HEADER *hdr, int flags,
		   int chflags)
699
{
700
  MESSAGE *msg;
701
  int r;
702 703
  
  if ((msg = mx_open_message (src, hdr->msgno)) == NULL)
704
    return -1;
705 706
  if ((r = _mutt_copy_message (fpout, msg->fp, hdr, hdr->content, flags, chflags)) == 0 
      && (ferror (fpout) || feof (fpout)))
707
  {
708
    dprint (1, (debugfile, "_mutt_copy_message failed to detect EOF!\n"));
709 710
    r = -1;
  }
711
  mx_close_message (src, &msg);
712 713 714 715 716
  return r;
}

/* appends a copy of the given message to a mailbox
 *
717 718 719 720 721 722 723
 * dest		destination mailbox
 * fpin		where to get input
 * src		source mailbox
 * hdr		message being copied
 * body		structure of message being copied
 * flags	mutt_copy_message() flags
 * chflags	mutt_copy_header() flags
724
 */
725 726 727 728

int
_mutt_append_message (CONTEXT *dest, FILE *fpin, CONTEXT *src, HEADER *hdr,
		      BODY *body, int flags, int chflags)
729 730
{
  char buf[STRING];
731
  MESSAGE *msg;
732 733
  int r;

734 735
  fseeko (fpin, hdr->offset, 0);
  if (fgets (buf, sizeof (buf), fpin) == NULL)
736
    return -1;
737 738
  
  if ((msg = mx_open_new_message (dest, hdr, is_from (buf, NULL, 0, NULL) ? 0 : MUTT_ADD_FROM)) == NULL)
739
    return -1;
740
  if (dest->magic == MUTT_MBOX || dest->magic == MUTT_MMDF)
741
    chflags |= CH_FROM | CH_FORCE_FROM;
742
  chflags |= (dest->magic == MUTT_MAILDIR ? CH_NOSTATUS : CH_UPDATE);
743 744
  r = _mutt_copy_message (msg->fp, fpin, hdr, body, flags, chflags);
  if (mx_commit_message (msg, dest) != 0)
745 746
    r = -1;

747
  mx_close_message (dest, &msg);
748 749 750
  return r;
}

751 752 753
int
mutt_append_message (CONTEXT *dest, CONTEXT *src, HEADER *hdr, int cmflags,
		     int chflags)
754
{
755
  MESSAGE *msg;
756 757
  int r;

758
  if ((msg = mx_open_message (src, hdr->msgno)) == NULL)
759
    return -1;
760 761
  r = _mutt_append_message (dest, msg->fp, src, hdr, hdr->content, cmflags, chflags);
  mx_close_message (src, &msg);
762 763 764 765 766 767 768 769 770 771
  return r;
}

/*
 * This function copies a message body, while deleting _in_the_copy_
 * any attachments which are marked for deletion.
 * Nothing is changed in the original message -- this is left to the caller.
 *
 * The function will return 0 on success and -1 on failure.
 */
772
static int copy_delete_attach (BODY *b, FILE *fpin, FILE *fpout, char *date)
773
{
774
  BODY *part;
775

776
  for (part = b->parts ; part ; part = part->next)
777 778 779 780
  {
    if (part->deleted || part->parts)
    {
      /* Copy till start of this part */
781 782
      if (mutt_copy_bytes (fpin, fpout, part->hdr_offset - ftello (fpin)))
	return -1;
783 784 785

      if (part->deleted)
      {
786 787 788 789 790 791 792 793 794 795 796 797 798
	fprintf (fpout,
		 "Content-Type: message/external-body; access-type=x-mutt-deleted;\n"
		 "\texpiration=%s; length=" OFF_T_FMT "\n"
		 "\n", date + 5, part->length);
	if (ferror (fpout))
	  return -1;

	/* Copy the original mime headers */
	if (mutt_copy_bytes (fpin, fpout, part->offset - ftello (fpin)))
	  return -1;

	/* Skip the deleted body */
	fseeko (fpin, part->offset + part->length, SEEK_SET);
799 800 801
      }
      else
      {
802 803
	if (copy_delete_attach (part, fpin, fpout, date))
	  return -1;
804 805 806 807 808
      }
    }
  }

  /* Copy the last parts */
809
  if (mutt_copy_bytes (fpin, fpout, b->offset + b->length - ftello (fpin)))
810 811 812 813 814
    return -1;

  return 0;
}

815
/* 
816 817 818
 * This function is the equivalent of mutt_write_address_list(),
 * but writes to a buffer instead of writing to a stream.
 * mutt_write_address_list could be re-used if we wouldn't store
819
 * all the decoded headers in a huge array, first. 
820
 *
821
 * XXX - fix that. 
822
 */
823 824

static void format_address_header (char **h, ADDRESS *a)
825 826 827 828 829
{
  char buf[HUGE_STRING];
  char cbuf[STRING];
  char c2buf[STRING];
  char *p = NULL;
830
  int l, linelen, buflen, count, cbuflen, c2buflen, plen;
831

832
  linelen = mutt_strlen (*h);
833
  plen = linelen;
834
  buflen  = linelen + 3;
835

836 837
  safe_realloc (h, buflen);
  for (count = 0; a; a = a->next, count++)
838
  {
839
    ADDRESS *tmp = a->next;
840 841
    a->next = NULL;
    *buf = *cbuf = *c2buf = '\0';
842
    l = rfc822_write_address (buf, sizeof (buf), a, 0);
843
    a->next = tmp;
844 845
    
    if (count && linelen + l > 74) 
846
    {
847
      strcpy (cbuf, "\n\t");  	/* __STRCPY_CHECKED__ */
848 849 850 851 852 853
      linelen = l + 8;
    }
    else
    {
      if (a->mailbox)
      {
854 855
	strcpy (cbuf, " ");	/* __STRCPY_CHECKED__ */
	linelen++;
856 857 858 859 860 861 862
      }
      linelen += l;
    }
    if (!a->group && a->next && a->next->mailbox)
    {
      linelen++;
      buflen++;
863
      strcpy (c2buf, ",");	/* __STRCPY_CHECKED__ */
864 865
    }

866 867
    cbuflen = mutt_strlen (cbuf);
    c2buflen = mutt_strlen (c2buf);
868
    buflen += l + cbuflen + c2buflen;
869
    safe_realloc (h, buflen);
870
    p = *h;
871
    strcat (p + plen, cbuf);		/* __STRCAT_CHECKED__ */
872
    plen += cbuflen;
873
    strcat (p + plen, buf);		/* __STRCAT_CHECKED__ */
874
    plen += l;
875
    strcat (p + plen, c2buf);		/* __STRCAT_CHECKED__ */
876 877
    plen += c2buflen;
  }
878
  
879
  /* Space for this was allocated in the beginning of this function. */
880
  strcat (p + plen, "\n");		/* __STRCAT_CHECKED__ */
881 882
}

883
static int address_header_decode (char **h)
884 885
{
  char *s = *h;
886
  int l, rp = 0;
887

888 889
  ADDRESS *a = NULL;
  ADDRESS *cur = NULL;
890

891
  switch (tolower ((unsigned char) *s))
892
  {
893
    case 'r': 
894
    {
895
      if (ascii_strncasecmp (s, "return-path:", 12) == 0)
896
      {
897 898 899
	l = 12;
	rp = 1;
	break;
900
      }
901
      else if (ascii_strncasecmp (s, "reply-to:", 9) == 0)
902
      {
903 904
	l = 9;
	break;
905 906 907
      }
      return 0;
    }
908
    case 'f': 
909
    {
910 911
      if (ascii_strncasecmp (s, "from:", 5)) 
	return 0; 
912 913 914 915 916
      l = 5;
      break;
    }
    case 'c':
    {
917 918
      if (ascii_strncasecmp (s, "cc:", 3))
	return 0;
919 920
      l = 3;
      break;
921
      
922 923 924
    }
    case 'b':
    {
925 926
      if (ascii_strncasecmp (s, "bcc:", 4))
	return 0;
927 928 929 930 931
      l = 4;
      break;
    }
    case 's':
    {
932 933
      if (ascii_strncasecmp (s, "sender:", 7))
	return 0;
934 935 936 937 938
      l = 7;
      break;
    }
    case 't':
    {
939 940
      if (ascii_strncasecmp (s, "to:", 3))
	return 0;
941 942 943 944 945
      l = 3;
      break;
    }
    case 'm':
    {
946 947
      if (ascii_strncasecmp (s, "mail-followup-to:", 17))
	return 0;
948 949 950
      l = 17;
      break;
    }
951
    default: return 0;    
952 953
  }

954
  if ((a = rfc822_parse_adrlist (a, s + l)) == NULL)
955
    return 0;
956 957 958
  
  mutt_addrlist_to_local (a);
  rfc2047_decode_adrlist (a);
959 960
  for (cur = a; cur; cur = cur->next)
    if (cur->personal)
961
      rfc822_dequote_comment (cur->personal);
962 963 964 965

  /* angle brackets for return path are mandated by RfC5322,
   * so leave Return-Path as-is */
  if (rp)
966
    *h = safe_strdup (s);
967 968
  else
  {
969 970 971
    *h = safe_calloc (1, l + 2);
    strfcpy (*h, s, l + 1);
    format_address_header (h, a);
972
  }
973

974
  rfc822_free_address (&a);
975

976
  FREE (&s);
977 978
  return 1;
}