sendlib.c File Reference

Miscellaneous functions for sending an email. More...

#include "config.h"
#include <errno.h>
#include <iconv.h>
#include <inttypes.h>
#include <limits.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <time.h>
#include <unistd.h>
#include "mutt/lib.h"
#include "address/lib.h"
#include "config/lib.h"
#include "email/lib.h"
#include "core/lib.h"
#include "mutt.h"
#include "sendlib.h"
#include "lib.h"
#include "ncrypt/lib.h"
#include "context.h"
#include "copy.h"
#include "handler.h"
#include "mutt_globals.h"
#include "mutt_mailbox.h"
#include "mutt_parse.h"
#include "muttlib.h"
#include "mx.h"
#include "options.h"
#include "state.h"

Include dependency graph for sendlib.c:

Go to the source code of this file.

Data Structures
struct	ContentState
	Info about the body of an email. More...

Functions
static void	update_content_info (struct Content *info, struct ContentState *s, char *buf, size_t buflen)
	Cache some info about an email. More...
static size_t	convert_file_to (FILE *fp, const char *fromcode, int ncodes, char const *const *tocodes, int *tocode, struct Content *info)
	Change the encoding of a file. More...
static size_t	convert_file_from_to (FILE *fp, const char *fromcodes, const char *tocodes, char **fromcode, char **tocode, struct Content *info)
	Convert a file between encodings. More...
struct Content *	mutt_get_content_info (const char *fname, struct Body *b, struct ConfigSubset *sub)
	Analyze file to determine MIME encoding to use. More...
enum ContentType	mutt_lookup_mime_type (struct Body *att, const char *path)
	Find the MIME type for an attachment. More...
static void	transform_to_7bit (struct Body *a, FILE *fp_in, struct ConfigSubset *sub)
	Convert MIME parts to 7-bit. More...
void	mutt_message_to_7bit (struct Body *a, FILE *fp, struct ConfigSubset *sub)
	Convert an email's MIME parts to 7-bit. More...
static void	set_encoding (struct Body *b, struct Content *info, struct ConfigSubset *sub)
	determine which Content-Transfer-Encoding to use More...
void	mutt_stamp_attachment (struct Body *a)
	Timestamp an Attachment. More...
void	mutt_update_encoding (struct Body *a, struct ConfigSubset *sub)
	Update the encoding type. More...
struct Body *	mutt_make_message_attach (struct Mailbox *m, struct Email *e, bool attach_msg, struct ConfigSubset *sub)
	Create a message attachment. More...
static void	run_mime_type_query (struct Body *att, struct ConfigSubset *sub)
	Run an external command to determine the MIME type. More...
struct Body *	mutt_make_file_attach (const char *path, struct ConfigSubset *sub)
	Create a file attachment. More...
static void	encode_headers (struct ListHead *h, struct ConfigSubset *sub)
	RFC2047-encode a list of headers. More...
const char *	mutt_fqdn (bool may_hide_host, const struct ConfigSubset *sub)
	Get the Fully-Qualified Domain Name. More...
static char *	gen_msgid (struct ConfigSubset *sub)
	Generate a unique Message ID. More...
void	mutt_prepare_envelope (struct Envelope *env, bool final, struct ConfigSubset *sub)
	Prepare an email header. More...
void	mutt_unprepare_envelope (struct Envelope *env)
	Undo the encodings of mutt_prepare_envelope() More...
static int	bounce_message (FILE *fp, struct Email *e, struct AddressList *to, const char *resent_from, struct AddressList *env_from, struct ConfigSubset *sub)
	Bounce an email message. More...
int	mutt_bounce_message (FILE *fp, struct Email *e, struct AddressList *to, struct ConfigSubset *sub)
	Bounce an email message. More...
static void	set_noconv_flags (struct Body *b, bool flag)
	Set/reset the "x-mutt-noconv" flag. More...
int	mutt_write_multiple_fcc (const char *path, struct Email *e, const char *msgid, bool post, char *fcc, char **finalpath, struct ConfigSubset *sub)
	Handle FCC with multiple, comma separated entries. More...
int	mutt_write_fcc (const char *path, struct Email *e, const char *msgid, bool post, const char *fcc, char **finalpath, struct ConfigSubset *sub)
	Write email to FCC mailbox. More...

Detailed Description

Miscellaneous functions for sending an email.

Authors

• Michael R. Elkins
• Pietro Cerutti

Copyright

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, see http://www.gnu.org/licenses/.

Definition in file sendlib.c.

Function Documentation

update_content_info()

static void update_content_info ( struct Content *  info, struct ContentState *  s, char *  buf, size_t  buflen  )

static

Cache some info about an email.

Parameters

info	Info about an Attachment
s	Info about the Body of an email
buf	Buffer for the result
buflen	Length of the buffer

Definition at line 80 of file sendlib.c.

{
  bool from = s->from;
  int whitespace = s->whitespace;
  bool dot = s->dot;
  int linelen = s->linelen;
  bool was_cr = s->was_cr;

  if (!buf) /* This signals EOF */
  {
    if (was_cr)
      info->binary = true;
    if (linelen > info->linemax)
      info->linemax = linelen;

    return;
  }

  for (; buflen; buf++, buflen--)
  {
    char ch = *buf;

    if (was_cr)
    {
      was_cr = false;
      if (ch == '\n')
      {
        if (whitespace)
          info->space = true;
        if (dot)
          info->dot = true;
        if (linelen > info->linemax)
          info->linemax = linelen;
        whitespace = 0;
        dot = false;
        linelen = 0;
        continue;
      }

      info->binary = true;
    }

    linelen++;
    if (ch == '\n')
    {
      info->crlf++;
      if (whitespace)
        info->space = true;
      if (dot)
        info->dot = true;
      if (linelen > info->linemax)
        info->linemax = linelen;
      whitespace = 0;
      linelen = 0;
      dot = false;
    }
    else if (ch == '\r')
    {
      info->crlf++;
      info->cr = true;
      was_cr = true;
      continue;
    }
    else if (ch & 0x80)
      info->hibin++;
    else if ((ch == '\t') || (ch == '\f'))
    {
      info->ascii++;
      whitespace++;
    }
    else if (ch == 0)
    {
      info->nulbin++;
      info->lobin++;
    }
    else if ((ch < 32) || (ch == 127))
      info->lobin++;
    else
    {
      if (linelen == 1)
      {
        if ((ch == 'F') || (ch == 'f'))
          from = true;
        else
          from = false;
        if (ch == '.')
          dot = true;
        else
          dot = false;
      }
      else if (from)
      {
        if ((linelen == 2) && (ch != 'r'))
          from = false;
        else if ((linelen == 3) && (ch != 'o'))
          from = false;
        else if (linelen == 4)
        {
          if (ch == 'm')
            info->from = true;
          from = false;
        }
      }
      if (ch == ' ')
        whitespace++;
      info->ascii++;
    }

    if (linelen > 1)
      dot = false;
    if ((ch != ' ') && (ch != '\t'))
      whitespace = 0;
  }

  s->from = from;
  s->whitespace = whitespace;
  s->dot = dot;
  s->linelen = linelen;
  s->was_cr = was_cr;
}

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convert_file_to()

static size_t convert_file_to ( FILE *  fp, const char *  fromcode, int  ncodes, char const *const *  tocodes, int *  tocode, struct Content *  info  )

static

Change the encoding of a file.

Parameters

[in]	fp	File to convert
[in]	fromcode	Original encoding
[in]	ncodes	Number of target encodings
[in]	tocodes	List of target encodings
[out]	tocode	Chosen encoding
[in]	info	Encoding information

Return values

-1	Error, no conversion was possible
>0	Success, number of bytes converted

Find the best charset conversion of the file from fromcode into one of the tocodes. If successful, set *tocode and Content *info and return the number of characters converted inexactly.

We convert via UTF-8 in order to avoid the condition -1(EINVAL), which would otherwise prevent us from knowing the number of inexact conversions. Where the candidate target charset is UTF-8 we avoid doing the second conversion because iconv_open("UTF-8", "UTF-8") fails with some libraries.

We assume that the output from iconv is never more than 4 times as long as the input for any pair of charsets we might be interested in.

Definition at line 227 of file sendlib.c.

{
  char bufi[256], bufu[512], bufo[4 * sizeof(bufi)];
  size_t ret;

  const iconv_t cd1 = mutt_ch_iconv_open("utf-8", fromcode, 0);
  if (cd1 == (iconv_t)(-1))
    return -1;

  iconv_t *cd = mutt_mem_calloc(ncodes, sizeof(iconv_t));
  size_t *score = mutt_mem_calloc(ncodes, sizeof(size_t));
  struct ContentState *states = mutt_mem_calloc(ncodes, sizeof(struct ContentState));
  struct Content *infos = mutt_mem_calloc(ncodes, sizeof(struct Content));

  for (int i = 0; i < ncodes; i++)
  {
    if (!mutt_istr_equal(tocodes[i], "utf-8"))
      cd[i] = mutt_ch_iconv_open(tocodes[i], "utf-8", 0);
    else
    {
      /* Special case for conversion to UTF-8 */
      cd[i] = (iconv_t)(-1);
      score[i] = (size_t)(-1);
    }
  }

  rewind(fp);
  size_t ibl = 0;
  while (true)
  {
    /* Try to fill input buffer */
    size_t n = fread(bufi + ibl, 1, sizeof(bufi) - ibl, fp);
    ibl += n;

    /* Convert to UTF-8 */
    const char *ib = bufi;
    char *ob = bufu;
    size_t obl = sizeof(bufu);
    n = iconv(cd1, (ICONV_CONST char **) ((ibl != 0) ? &ib : 0), &ibl, &ob, &obl);
    /* assert(n == (size_t)(-1) || !n); */
    if ((n == (size_t)(-1)) && (((errno != EINVAL) && (errno != E2BIG)) || (ib == bufi)))
    {
      /* assert(errno == EILSEQ || (errno == EINVAL && ib == bufi && ibl < sizeof(bufi))); */
      ret = (size_t)(-1);
      break;
    }
    const size_t ubl1 = ob - bufu;

    /* Convert from UTF-8 */
    for (int i = 0; i < ncodes; i++)
    {
      if ((cd[i] != (iconv_t)(-1)) && (score[i] != (size_t)(-1)))
      {
        const char *ub = bufu;
        size_t ubl = ubl1;
        ob = bufo;
        obl = sizeof(bufo);
        n = iconv(cd[i], (ICONV_CONST char **) ((ibl || ubl) ? &ub : 0), &ubl, &ob, &obl);
        if (n == (size_t)(-1))
        {
          /* assert(errno == E2BIG || (BUGGY_ICONV && (errno == EILSEQ || errno == ENOENT))); */
          score[i] = (size_t)(-1);
        }
        else
        {
          score[i] += n;
          update_content_info(&infos[i], &states[i], bufo, ob - bufo);
        }
      }
      else if ((cd[i] == (iconv_t)(-1)) && (score[i] == (size_t)(-1)))
      {
        /* Special case for conversion to UTF-8 */
        update_content_info(&infos[i], &states[i], bufu, ubl1);
      }
    }

    if (ibl)
    {
      /* Save unused input */
      memmove(bufi, ib, ibl);
    }
    else if (!ubl1 && (ib < bufi + sizeof(bufi)))
    {
      ret = 0;
      break;
    }
  }

  if (ret == 0)
  {
    /* Find best score */
    ret = (size_t)(-1);
    for (int i = 0; i < ncodes; i++)
    {
      if ((cd[i] == (iconv_t)(-1)) && (score[i] == (size_t)(-1)))
      {
        /* Special case for conversion to UTF-8 */
        *tocode = i;
        ret = 0;
        break;
      }
      else if ((cd[i] == (iconv_t)(-1)) || (score[i] == (size_t)(-1)))
        continue;
      else if ((ret == (size_t)(-1)) || (score[i] < ret))
      {
        *tocode = i;
        ret = score[i];
        if (ret == 0)
          break;
      }
    }
    if (ret != (size_t)(-1))
    {
      memcpy(info, &infos[*tocode], sizeof(struct Content));
      update_content_info(info, &states[*tocode], 0, 0); /* EOF */
    }
  }

  for (int i = 0; i < ncodes; i++)
    if (cd[i] != (iconv_t)(-1))
      iconv_close(cd[i]);

  iconv_close(cd1);
  FREE(&cd);
  FREE(&infos);
  FREE(&score);
  FREE(&states);

  return ret;
}

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convert_file_from_to()

static size_t convert_file_from_to ( FILE *  fp, const char *  fromcodes, const char *  tocodes, char **  fromcode, char **  tocode, struct Content *  info  )

static

Convert a file between encodings.

Parameters

[in]	fp	File to read from
[in]	fromcodes	Charsets to try converting FROM
[in]	tocodes	Charsets to try converting TO
[out]	fromcode	From charset selected
[out]	tocode	To charset selected
[out]	info	Info about the file

Return values

num	Characters converted
-1	Error (as a size_t)

Find the first of the fromcodes that gives a valid conversion and the best charset conversion of the file into one of the tocodes. If successful, set *fromcode and *tocode to dynamically allocated strings, set Content *info, and return the number of characters converted inexactly. If no conversion was possible, return -1.

Both fromcodes and tocodes may be colon-separated lists of charsets. However, if fromcode is zero then fromcodes is assumed to be the name of a single charset even if it contains a colon.

Definition at line 380 of file sendlib.c.

{
  char *fcode = NULL;
  char **tcode = NULL;
  const char *c = NULL, *c1 = NULL;
  size_t ret;
  int ncodes, i, cn;

  /* Count the tocodes */
  ncodes = 0;
  for (c = tocodes; c; c = c1 ? c1 + 1 : 0)
  {
    c1 = strchr(c, ':');
    if (c1 == c)
      continue;
    ncodes++;
  }

  /* Copy them */
  tcode = mutt_mem_malloc(ncodes * sizeof(char *));
  for (c = tocodes, i = 0; c; c = c1 ? c1 + 1 : 0, i++)
  {
    c1 = strchr(c, ':');
    if (c1 == c)
      continue;
    if (c1)
      tcode[i] = mutt_strn_dup(c, c1 - c);
    else
      tcode[i] = mutt_str_dup(c);
  }

  ret = (size_t)(-1);
  if (fromcode)
  {
    /* Try each fromcode in turn */
    for (c = fromcodes; c; c = c1 ? c1 + 1 : 0)
    {
      c1 = strchr(c, ':');
      if (c1 == c)
        continue;
      if (c1)
        fcode = mutt_strn_dup(c, c1 - c);
      else
        fcode = mutt_str_dup(c);

      ret = convert_file_to(fp, fcode, ncodes, (char const *const *) tcode, &cn, info);
      if (ret != (size_t)(-1))
      {
        *fromcode = fcode;
        *tocode = tcode[cn];
        tcode[cn] = 0;
        break;
      }
      FREE(&fcode);
    }
  }
  else
  {
    /* There is only one fromcode */
    ret = convert_file_to(fp, fromcodes, ncodes, (char const *const *) tcode, &cn, info);
    if (ret != (size_t)(-1))
    {
      *tocode = tcode[cn];
      tcode[cn] = 0;
    }
  }

  /* Free memory */
  for (i = 0; i < ncodes; i++)
    FREE(&tcode[i]);

  FREE(&tcode);

  return ret;
}

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mutt_get_content_info()

struct Content* mutt_get_content_info	(	const char *	fname,
		struct Body *	b,
		struct ConfigSubset *	sub
	)

Analyze file to determine MIME encoding to use.

Parameters

fname	File to examine
b	Body to update
sub	Config Subset

Return values

ptr	Newly allocated Content

Also set the body charset, sometimes, or not.

Definition at line 466 of file sendlib.c.

{
  struct Content *info = NULL;
  struct ContentState state = { 0 };
  FILE *fp = NULL;
  char *fromcode = NULL;
  char *tocode = NULL;
  char buf[100];
  size_t r;

  struct stat sb;

  if (b && !fname)
    fname = b->filename;
  if (!fname)
    return NULL;

  if (stat(fname, &sb) == -1)
  {
    mutt_error(_("Can't stat %s: %s"), fname, strerror(errno));
    return NULL;
  }

  if (!S_ISREG(sb.st_mode))
  {
    mutt_error(_("%s isn't a regular file"), fname);
    return NULL;
  }

  fp = fopen(fname, "r");
  if (!fp)
  {
    mutt_debug(LL_DEBUG1, "%s: %s (errno %d)\n", fname, strerror(errno), errno);
    return NULL;
  }

  info = mutt_mem_calloc(1, sizeof(struct Content));

  const char *c_charset = cs_subset_string(sub, "charset");

  if (b && (b->type == TYPE_TEXT) && (!b->noconv && !b->force_charset))
  {
    const char *c_attach_charset = cs_subset_string(sub, "attach_charset");
    const char *c_send_charset = cs_subset_string(sub, "send_charset");

    char *chs = mutt_param_get(&b->parameter, "charset");
    const char *fchs =
        b->use_disp ? (c_attach_charset ? c_attach_charset : c_charset) : c_charset;
    if (c_charset && (chs || c_send_charset) &&
        (convert_file_from_to(fp, fchs, chs ? chs : c_send_charset, &fromcode,
                              &tocode, info) != (size_t)(-1)))
    {
      if (!chs)
      {
        char chsbuf[256];
        mutt_ch_canonical_charset(chsbuf, sizeof(chsbuf), tocode);
        mutt_param_set(&b->parameter, "charset", chsbuf);
      }
      FREE(&b->charset);
      b->charset = fromcode;
      FREE(&tocode);
      mutt_file_fclose(&fp);
      return info;
    }
  }

  rewind(fp);
  while ((r = fread(buf, 1, sizeof(buf), fp)))
    update_content_info(info, &state, buf, r);
  update_content_info(info, &state, 0, 0);

  mutt_file_fclose(&fp);

  if (b && (b->type == TYPE_TEXT) && (!b->noconv && !b->force_charset))
  {
    mutt_param_set(&b->parameter, "charset",
                   (!info->hibin ?
                        "us-ascii" :
                        c_charset && !mutt_ch_is_us_ascii(c_charset) ? c_charset : "unknown-8bit"));
  }

  return info;
}

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mutt_lookup_mime_type()

enum ContentType mutt_lookup_mime_type	(	struct Body *	att,
		const char *	path
	)

Find the MIME type for an attachment.

Parameters

att	Email with attachment
path	Path to attachment

Return values

num	MIME type, e.g. TYPE_IMAGE

Given a file at 'path', see if there is a registered MIME type. Returns the major MIME type, and copies the subtype to "d". First look in a system mime.types if we can find one, then look for ~/.mime.types. The longest match is used so that we can match 'ps.gz' when 'gz' also exists.

Definition at line 563 of file sendlib.c.

{
  FILE *fp = NULL;
  char *p = NULL, *q = NULL, *ct = NULL;
  char buf[PATH_MAX];
  char subtype[256] = { 0 };
  char xtype[256] = { 0 };
  int sze, cur_sze = 0;
  bool found_mimetypes = false;
  enum ContentType type = TYPE_OTHER;

  int szf = mutt_str_len(path);

  for (int count = 0; count < 4; count++)
  {
    /* can't use strtok() because we use it in an inner loop below, so use
     * a switch statement here instead.  */
    switch (count)
    {
      /* last file with last entry to match wins type/xtype */
      case 0:
        /* check default unix mimetypes location first */
        mutt_str_copy(buf, "/etc/mime.types", sizeof(buf));
        break;
      case 1:
        mutt_str_copy(buf, SYSCONFDIR "/mime.types", sizeof(buf));
        break;
      case 2:
        mutt_str_copy(buf, PKGDATADIR "/mime.types", sizeof(buf));
        break;
      case 3:
        snprintf(buf, sizeof(buf), "%s/.mime.types", NONULL(HomeDir));
        break;
      default:
        mutt_debug(LL_DEBUG1, "Internal error, count = %d\n", count);
        goto bye; /* shouldn't happen */
    }

    fp = fopen(buf, "r");
    if (fp)
    {
      found_mimetypes = true;

      while (fgets(buf, sizeof(buf) - 1, fp))
      {
        /* weed out any comments */
        p = strchr(buf, '#');
        if (p)
          *p = '\0';

        /* remove any leading space. */
        ct = buf;
        SKIPWS(ct);

        /* position on the next field in this line */
        p = strpbrk(ct, " \t");
        if (!p)
          continue;
        *p++ = 0;
        SKIPWS(p);

        /* cycle through the file extensions */
        while ((p = strtok(p, " \t\n")))
        {
          sze = mutt_str_len(p);
          if ((sze > cur_sze) && (szf >= sze) && mutt_istr_equal(path + szf - sze, p) &&
              ((szf == sze) || (path[szf - sze - 1] == '.')))
          {
            /* get the content-type */

            p = strchr(ct, '/');
            if (!p)
            {
              /* malformed line, just skip it. */
              break;
            }
            *p++ = 0;

            for (q = p; *q && !IS_SPACE(*q); q++)
              ; // do nothing

            mutt_strn_copy(subtype, p, q - p, sizeof(subtype));

            type = mutt_check_mime_type(ct);
            if (type == TYPE_OTHER)
              mutt_str_copy(xtype, ct, sizeof(xtype));

            cur_sze = sze;
          }
          p = NULL;
        }
      }
      mutt_file_fclose(&fp);
    }
  }

bye:

  /* no mime.types file found */
  if (!found_mimetypes)
  {
    mutt_error(_("Could not find any mime.types file."));
  }

  if ((type != TYPE_OTHER) || (*xtype != '\0'))
  {
    att->type = type;
    mutt_str_replace(&att->subtype, subtype);
    mutt_str_replace(&att->xtype, xtype);
  }

  return type;
}

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transform_to_7bit()

static void transform_to_7bit ( struct Body *  a, FILE *  fp_in, struct ConfigSubset *  sub  )

static

Convert MIME parts to 7-bit.

Parameters

a	Body of the email
fp_in	File to read
sub	Config Subset

Definition at line 683 of file sendlib.c.

{
  struct Buffer *buf = NULL;
  struct State s = { 0 };
  struct stat sb;

  for (; a; a = a->next)
  {
    if (a->type == TYPE_MULTIPART)
    {
      a->encoding = ENC_7BIT;
      transform_to_7bit(a->parts, fp_in, sub);
    }
    else if (mutt_is_message_type(a->type, a->subtype))
    {
      mutt_message_to_7bit(a, fp_in, sub);
    }
    else
    {
      a->noconv = true;
      a->force_charset = true;

      /* Because of the potential recursion in message types, we
       * restrict the lifetime of the buffer tightly */
      buf = mutt_buffer_pool_get();
      mutt_buffer_mktemp(buf);
      s.fp_out = mutt_file_fopen(mutt_b2s(buf), "w");
      if (!s.fp_out)
      {
        mutt_perror("fopen");
        mutt_buffer_pool_release(&buf);
        return;
      }
      s.fp_in = fp_in;
      mutt_decode_attachment(a, &s);
      mutt_file_fclose(&s.fp_out);
      FREE(&a->d_filename);
      a->d_filename = a->filename;
      a->filename = mutt_buffer_strdup(buf);
      mutt_buffer_pool_release(&buf);
      a->unlink = true;
      if (stat(a->filename, &sb) == -1)
      {
        mutt_perror("stat");
        return;
      }
      a->length = sb.st_size;

      mutt_update_encoding(a, sub);
      if (a->encoding == ENC_8BIT)
        a->encoding = ENC_QUOTED_PRINTABLE;
      else if (a->encoding == ENC_BINARY)
        a->encoding = ENC_BASE64;
    }
  }
}

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mutt_message_to_7bit()

void mutt_message_to_7bit	(	struct Body *	a,
		FILE *	fp,
		struct ConfigSubset *	sub
	)

Convert an email's MIME parts to 7-bit.

Parameters

a	Body of the email
fp	File to read (OPTIONAL)
sub	Config Subset

Definition at line 746 of file sendlib.c.

{
  struct Buffer temp = mutt_buffer_make(0);
  FILE *fp_in = NULL;
  FILE *fp_out = NULL;
  struct stat sb;

  if (!a->filename && fp)
    fp_in = fp;
  else if (!a->filename || !(fp_in = fopen(a->filename, "r")))
  {
    mutt_error(_("Could not open %s"), a->filename ? a->filename : "(null)");
    return;
  }
  else
  {
    a->offset = 0;
    if (stat(a->filename, &sb) == -1)
    {
      mutt_perror("stat");
      mutt_file_fclose(&fp_in);
      goto cleanup;
    }
    a->length = sb.st_size;
  }

  /* Avoid buffer pool due to recursion */
  mutt_buffer_mktemp(&temp);
  fp_out = mutt_file_fopen(mutt_b2s(&temp), "w+");
  if (!fp_out)
  {
    mutt_perror("fopen");
    goto cleanup;
  }

  fseeko(fp_in, a->offset, SEEK_SET);
  a->parts = mutt_rfc822_parse_message(fp_in, a);

  transform_to_7bit(a->parts, fp_in, sub);

  mutt_copy_hdr(fp_in, fp_out, a->offset, a->offset + a->length,
                CH_MIME | CH_NONEWLINE | CH_XMIT, NULL, 0);

  fputs("MIME-Version: 1.0\n", fp_out);
  mutt_write_mime_header(a->parts, fp_out, sub);
  fputc('\n', fp_out);
  mutt_write_mime_body(a->parts, fp_out, sub);

  if (fp_in != fp)
    mutt_file_fclose(&fp_in);
  mutt_file_fclose(&fp_out);

  a->encoding = ENC_7BIT;
  FREE(&a->d_filename);
  a->d_filename = a->filename;
  if (a->filename && a->unlink)
    unlink(a->filename);
  a->filename = mutt_buffer_strdup(&temp);
  a->unlink = true;
  if (stat(a->filename, &sb) == -1)
  {
    mutt_perror("stat");
    goto cleanup;
  }
  a->length = sb.st_size;
  mutt_body_free(&a->parts);
  a->email->body = NULL;

cleanup:
  if (fp_in && (fp_in != fp))
    mutt_file_fclose(&fp_in);

  if (fp_out)
  {
    mutt_file_fclose(&fp_out);
    mutt_file_unlink(mutt_b2s(&temp));
  }

  mutt_buffer_dealloc(&temp);
}

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set_encoding()

static void set_encoding ( struct Body *  b, struct Content *  info, struct ConfigSubset *  sub  )

static

determine which Content-Transfer-Encoding to use

Parameters

[in]	b	Body of email
[out]	info	Info about the email
[in]	sub	Config Subset

Definition at line 833 of file sendlib.c.

{
  const bool c_allow_8bit = cs_subset_bool(sub, "allow_8bit");
  if (b->type == TYPE_TEXT)
  {
    const bool c_encode_from = cs_subset_bool(sub, "encode_from");
    char send_charset[128];
    char *chsname = mutt_body_get_charset(b, send_charset, sizeof(send_charset));
    if ((info->lobin && !mutt_istr_startswith(chsname, "iso-2022")) ||
        (info->linemax > 990) || (info->from && c_encode_from))
    {
      b->encoding = ENC_QUOTED_PRINTABLE;
    }
    else if (info->hibin)
    {
      b->encoding = c_allow_8bit ? ENC_8BIT : ENC_QUOTED_PRINTABLE;
    }
    else
    {
      b->encoding = ENC_7BIT;
    }
  }
  else if ((b->type == TYPE_MESSAGE) || (b->type == TYPE_MULTIPART))
  {
    if (info->lobin || info->hibin)
    {
      if (c_allow_8bit && !info->lobin)
        b->encoding = ENC_8BIT;
      else
        mutt_message_to_7bit(b, NULL, sub);
    }
    else
      b->encoding = ENC_7BIT;
  }
  else if ((b->type == TYPE_APPLICATION) &&
           mutt_istr_equal(b->subtype, "pgp-keys"))
  {
    b->encoding = ENC_7BIT;
  }
  else
  {
    /* Determine which encoding is smaller  */
    if (1.33 * (float) (info->lobin + info->hibin + info->ascii) <
        3.0 * (float) (info->lobin + info->hibin) + (float) info->ascii)
    {
      b->encoding = ENC_BASE64;
    }
    else
    {
      b->encoding = ENC_QUOTED_PRINTABLE;
    }
  }
}

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mutt_stamp_attachment()

void mutt_stamp_attachment

(

struct Body *

a

)

Timestamp an Attachment.

Parameters

a	Attachment

Definition at line 891 of file sendlib.c.

{
  a->stamp = mutt_date_epoch();
}

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mutt_update_encoding()

void mutt_update_encoding	(	struct Body *	a,
		struct ConfigSubset *	sub
	)

Update the encoding type.

Parameters

a	Body to update
sub	Config Subset

Assumes called from send mode where Body->filename points to actual file

Definition at line 903 of file sendlib.c.

{
  struct Content *info = NULL;
  char chsbuf[256];

  /* override noconv when it's us-ascii */
  if (mutt_ch_is_us_ascii(mutt_body_get_charset(a, chsbuf, sizeof(chsbuf))))
    a->noconv = false;

  if (!a->force_charset && !a->noconv)
    mutt_param_delete(&a->parameter, "charset");

  info = mutt_get_content_info(a->filename, a, sub);
  if (!info)
    return;

  set_encoding(a, info, sub);
  mutt_stamp_attachment(a);

  FREE(&a->content);
  a->content = info;
}

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mutt_make_message_attach()

struct Body* mutt_make_message_attach	(	struct Mailbox *	m,
		struct Email *	e,
		bool	attach_msg,
		struct ConfigSubset *	sub
	)

Create a message attachment.

Parameters

m	Mailbox
e	Email
attach_msg	true if attaching a message
sub	Config Subset

Return values

ptr	Newly allocated Body
NULL	Error

Definition at line 935 of file sendlib.c.

{
  struct Body *body = NULL;
  FILE *fp = NULL;
  CopyMessageFlags cmflags;
  SecurityFlags pgp = WithCrypto ? e->security : SEC_NO_FLAGS;

  const bool c_mime_forward_decode = cs_subset_bool(sub, "mime_forward_decode");
  const bool c_forward_decrypt = cs_subset_bool(sub, "forward_decrypt");
  if (WithCrypto)
  {
    if ((c_mime_forward_decode || c_forward_decrypt) && (e->security & SEC_ENCRYPT))
    {
      if (!crypt_valid_passphrase(e->security))
        return NULL;
    }
  }

  struct Buffer *buf = mutt_buffer_pool_get();
  mutt_buffer_mktemp(buf);
  fp = mutt_file_fopen(mutt_b2s(buf), "w+");
  if (!fp)
  {
    mutt_buffer_pool_release(&buf);
    return NULL;
  }

  body = mutt_body_new();
  body->type = TYPE_MESSAGE;
  body->subtype = mutt_str_dup("rfc822");
  body->filename = mutt_str_dup(mutt_b2s(buf));
  body->unlink = true;
  body->use_disp = false;
  body->disposition = DISP_INLINE;
  body->noconv = true;

  mutt_buffer_pool_release(&buf);

  mutt_parse_mime_message(m, e);

  CopyHeaderFlags chflags = CH_XMIT;
  cmflags = MUTT_CM_NO_FLAGS;

  const bool c_forward_decode = cs_subset_bool(sub, "forward_decode");
  /* If we are attaching a message, ignore `$mime_forward_decode` */
  if (!attach_msg && c_forward_decode)
  {
    chflags |= CH_MIME | CH_TXTPLAIN;
    cmflags = MUTT_CM_DECODE | MUTT_CM_CHARCONV;
    if (WithCrypto & APPLICATION_PGP)
      pgp &= ~PGP_ENCRYPT;
    if (WithCrypto & APPLICATION_SMIME)
      pgp &= ~SMIME_ENCRYPT;
  }
  else if ((WithCrypto != 0) && c_forward_decrypt && (e->security & SEC_ENCRYPT))
  {
    if (((WithCrypto & APPLICATION_PGP) != 0) && mutt_is_multipart_encrypted(e->body))
    {
      chflags |= CH_MIME | CH_NONEWLINE;
      cmflags = MUTT_CM_DECODE_PGP;
      pgp &= ~PGP_ENCRYPT;
    }
    else if (((WithCrypto & APPLICATION_PGP) != 0) &&
             ((mutt_is_application_pgp(e->body) & PGP_ENCRYPT) == PGP_ENCRYPT))
    {
      chflags |= CH_MIME | CH_TXTPLAIN;
      cmflags = MUTT_CM_DECODE | MUTT_CM_CHARCONV;
      pgp &= ~PGP_ENCRYPT;
    }
    else if (((WithCrypto & APPLICATION_SMIME) != 0) &&
             ((mutt_is_application_smime(e->body) & SMIME_ENCRYPT) == SMIME_ENCRYPT))
    {
      chflags |= CH_MIME | CH_TXTPLAIN;
      cmflags = MUTT_CM_DECODE | MUTT_CM_CHARCONV;
      pgp &= ~SMIME_ENCRYPT;
    }
  }

  mutt_copy_message(fp, m, e, cmflags, chflags, 0);

  fflush(fp);
  rewind(fp);

  body->email = email_new();
  body->email->offset = 0;
  /* we don't need the user headers here */
  body->email->env = mutt_rfc822_read_header(fp, body->email, false, false);
  if (WithCrypto)
    body->email->security = pgp;
  mutt_update_encoding(body, sub);
  body->parts = body->email->body;

  mutt_file_fclose(&fp);

  return body;
}

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run_mime_type_query()

static void run_mime_type_query ( struct Body *  att, struct ConfigSubset *  sub  )

static

Run an external command to determine the MIME type.

Parameters

att	Attachment
sub	Config Subset

The command in $mime_type_query_command is run.

Definition at line 1040 of file sendlib.c.

{
  FILE *fp = NULL, *fp_err = NULL;
  char *buf = NULL;
  size_t buflen;
  pid_t pid;
  struct Buffer *cmd = mutt_buffer_pool_get();

  const char *c_mime_type_query_command =
      cs_subset_string(sub, "mime_type_query_command");

  mutt_buffer_file_expand_fmt_quote(cmd, c_mime_type_query_command, att->filename);

  pid = filter_create(mutt_b2s(cmd), NULL, &fp, &fp_err);
  if (pid < 0)
  {
    mutt_error(_("Error running \"%s\""), mutt_b2s(cmd));
    mutt_buffer_pool_release(&cmd);
    return;
  }
  mutt_buffer_pool_release(&cmd);

  buf = mutt_file_read_line(buf, &buflen, fp, NULL, 0);
  if (buf)
  {
    if (strchr(buf, '/'))
      mutt_parse_content_type(buf, att);
    FREE(&buf);
  }

  mutt_file_fclose(&fp);
  mutt_file_fclose(&fp_err);
  filter_wait(pid);
}

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mutt_make_file_attach()

struct Body* mutt_make_file_attach	(	const char *	path,
		struct ConfigSubset *	sub
	)

Create a file attachment.

Parameters

path	File to attach
sub	Config Subset

Return values

ptr	Newly allocated Body
NULL	Error

Definition at line 1082 of file sendlib.c.

{
  struct Body *att = mutt_body_new();
  att->filename = mutt_str_dup(path);

  const char *c_mime_type_query_command =
      cs_subset_string(sub, "mime_type_query_command");
  const bool c_mime_type_query_first =
      cs_subset_bool(sub, "mime_type_query_first");

  if (c_mime_type_query_command && c_mime_type_query_first)
    run_mime_type_query(att, sub);

  /* Attempt to determine the appropriate content-type based on the filename
   * suffix.  */
  if (!att->subtype)
    mutt_lookup_mime_type(att, path);

  if (!att->subtype && c_mime_type_query_command && !c_mime_type_query_first)
  {
    run_mime_type_query(att, sub);
  }

  struct Content *info = mutt_get_content_info(path, att, sub);
  if (!info)
  {
    mutt_body_free(&att);
    return NULL;
  }

  if (!att->subtype)
  {
    if ((info->nulbin == 0) &&
        ((info->lobin == 0) || ((info->lobin + info->hibin + info->ascii) / info->lobin >= 10)))
    {
      /* Statistically speaking, there should be more than 10% "lobin"
       * chars if this is really a binary file...  */
      att->type = TYPE_TEXT;
      att->subtype = mutt_str_dup("plain");
    }
    else
    {
      att->type = TYPE_APPLICATION;
      att->subtype = mutt_str_dup("octet-stream");
    }
  }

  FREE(&info);
  mutt_update_encoding(att, sub);
  return att;
}

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encode_headers()

static void encode_headers ( struct ListHead *  h, struct ConfigSubset *  sub  )

static

RFC2047-encode a list of headers.

Parameters

h	String List of headers
sub	Config Subset

The strings are encoded in-place.

Definition at line 1141 of file sendlib.c.

{
  char *tmp = NULL;
  char *p = NULL;
  int i;

  const char *c_send_charset = cs_subset_string(sub, "send_charset");

  struct ListNode *np = NULL;
  STAILQ_FOREACH(np, h, entries)
  {
    p = strchr(np->data, ':');
    if (!p)
      continue;

    i = p - np->data;
    p = mutt_str_skip_email_wsp(p + 1);
    tmp = mutt_str_dup(p);

    if (!tmp)
      continue;

    rfc2047_encode(&tmp, NULL, i + 2, c_send_charset);
    mutt_mem_realloc(&np->data, i + 2 + mutt_str_len(tmp) + 1);

    sprintf(np->data + i + 2, "%s", tmp);

    FREE(&tmp);
  }
}

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mutt_fqdn()

const char* mutt_fqdn	(	bool	may_hide_host,
		const struct ConfigSubset *	sub
	)

Get the Fully-Qualified Domain Name.

Parameters

may_hide_host	If true, hide the hostname (leaving just the domain)
sub	Config Subset

Return values

ptr	string pointer into Hostname
NULL	Error, e.g no Hostname

Warning

Do not free the returned pointer

Definition at line 1181 of file sendlib.c.

{
  const char *c_hostname = cs_subset_string(sub, "hostname");
  if (!c_hostname || (c_hostname[0] == '@'))
    return NULL;

  const char *p = c_hostname;

  const bool c_hidden_host = cs_subset_bool(sub, "hidden_host");
  if (may_hide_host && c_hidden_host)
  {
    p = strchr(c_hostname, '.');
    if (p)
      p++;

    // sanity check: don't hide the host if the fqdn is something like example.com
    if (!p || !strchr(p, '.'))
      p = c_hostname;
  }

  return p;
}

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gen_msgid()

static char* gen_msgid ( struct ConfigSubset *  sub )

static

Generate a unique Message ID.

Return values

ptr	Message ID

Note

The caller should free the string

Definition at line 1210 of file sendlib.c.

{
  char buf[128];
  char rndid[MUTT_RANDTAG_LEN + 1];

  mutt_rand_base32(rndid, sizeof(rndid) - 1);
  rndid[MUTT_RANDTAG_LEN] = 0;
  const char *fqdn = mutt_fqdn(false, sub);
  if (!fqdn)
    fqdn = NONULL(ShortHostname);

  struct tm tm = mutt_date_gmtime(MUTT_DATE_NOW);
  snprintf(buf, sizeof(buf), "<%d%02d%02d%02d%02d%02d.%s@%s>", tm.tm_year + 1900,
           tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec, rndid, fqdn);
  return mutt_str_dup(buf);
}

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mutt_prepare_envelope()

void mutt_prepare_envelope	(	struct Envelope *	env,
		bool	final,
		struct ConfigSubset *	sub
	)

Prepare an email header.

Parameters

env	Envelope to prepare
final	true if this email is going to be sent (not postponed)
sub	Config Subset

Encode all the headers prior to sending the email.

For postponing (!final) do the necessary encodings only

Definition at line 1237 of file sendlib.c.

{
  if (final)
  {
    if (!TAILQ_EMPTY(&env->bcc) && TAILQ_EMPTY(&env->to) && TAILQ_EMPTY(&env->cc))
    {
      /* some MTA's will put an Apparently-To: header field showing the Bcc:
       * recipients if there is no To: or Cc: field, so attempt to suppress
       * it by using an empty To: field.  */
      struct Address *to = mutt_addr_new();
      to->group = true;
      mutt_addrlist_append(&env->to, to);
      mutt_addrlist_append(&env->to, mutt_addr_new());

      char buf[1024];
      buf[0] = '\0';
      mutt_addr_cat(buf, sizeof(buf), "undisclosed-recipients", AddressSpecials);

      to->mailbox = mutt_str_dup(buf);
    }

    mutt_set_followup_to(env, sub);

    if (!env->message_id)
      env->message_id = gen_msgid(sub);
  }

  /* Take care of 8-bit => 7-bit conversion. */
  rfc2047_encode_envelope(env);
  encode_headers(&env->userhdrs, sub);
}

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mutt_unprepare_envelope()

void mutt_unprepare_envelope

(

struct Envelope *

env

)

Undo the encodings of mutt_prepare_envelope()

Parameters

env	Envelope to unprepare

Decode all the headers of an email, e.g. when the sending failed or was aborted.

Definition at line 1276 of file sendlib.c.

{
  struct ListNode *item = NULL;
  STAILQ_FOREACH(item, &env->userhdrs, entries)
  {
    rfc2047_decode(&item->data);
  }

  mutt_addrlist_clear(&env->mail_followup_to);

  /* back conversions */
  rfc2047_decode_envelope(env);
}

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bounce_message()

static int bounce_message ( FILE *  fp, struct Email *  e, struct AddressList *  to, const char *  resent_from, struct AddressList *  env_from, struct ConfigSubset *  sub  )

static

Bounce an email message.

Parameters

fp	Handle of message
e	Email
to	Address to bounce to
resent_from	Address of new sender
env_from	Envelope of original sender
sub	Config Subset

Return values

0	Success
-1	Failure

Definition at line 1301 of file sendlib.c.

{
  if (!e)
    return -1;

  int rc = 0;

  struct Buffer *tempfile = mutt_buffer_pool_get();
  mutt_buffer_mktemp(tempfile);
  FILE *fp_tmp = mutt_file_fopen(mutt_b2s(tempfile), "w");
  if (fp_tmp)
  {
    CopyHeaderFlags chflags = CH_XMIT | CH_NONEWLINE | CH_NOQFROM;

    const bool c_bounce_delivered = cs_subset_bool(sub, "bounce_delivered");
    if (!c_bounce_delivered)
      chflags |= CH_WEED_DELIVERED;

    fseeko(fp, e->offset, SEEK_SET);
    fprintf(fp_tmp, "Resent-From: %s\n", resent_from);

    struct Buffer *date = mutt_buffer_pool_get();
    mutt_date_make_date(date);
    fprintf(fp_tmp, "Resent-Date: %s\n", mutt_b2s(date));
    mutt_buffer_pool_release(&date);

    char *msgid_str = gen_msgid(sub);
    fprintf(fp_tmp, "Resent-Message-ID: %s\n", msgid_str);
    FREE(&msgid_str);
    fputs("Resent-To: ", fp_tmp);
    mutt_addrlist_write_file(to, fp_tmp, 11, false);
    mutt_copy_header(fp, e, fp_tmp, chflags, NULL, 0);
    fputc('\n', fp_tmp);
    mutt_file_copy_bytes(fp, fp_tmp, e->body->length);
    if (mutt_file_fclose(&fp_tmp) != 0)
    {
      mutt_perror(mutt_b2s(tempfile));
      unlink(mutt_b2s(tempfile));
      return -1;
    }
#ifdef USE_SMTP
    const char *c_smtp_url = cs_subset_string(sub, "smtp_url");
    if (c_smtp_url)
    {
      rc = mutt_smtp_send(env_from, to, NULL, NULL, mutt_b2s(tempfile),
                          (e->body->encoding == ENC_8BIT), sub);
    }
    else
#endif
    {
      rc = mutt_invoke_sendmail(env_from, to, NULL, NULL, mutt_b2s(tempfile),
                                (e->body->encoding == ENC_8BIT), sub);
    }
  }

  mutt_buffer_pool_release(&tempfile);
  return rc;
}

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mutt_bounce_message()

int mutt_bounce_message	(	FILE *	fp,
		struct Email *	e,
		struct AddressList *	to,
		struct ConfigSubset *	sub
	)

Bounce an email message.

Parameters

fp	Handle of message
e	Email
to	AddressList to bounce to
sub	Config Subset

Return values

0	Success
-1	Failure

Definition at line 1371 of file sendlib.c.

{
  if (!fp || !e || !to || TAILQ_EMPTY(to))
    return -1;

  const char *fqdn = mutt_fqdn(true, sub);
  char resent_from[256];
  char *err = NULL;

  resent_from[0] = '\0';
  struct Address *from = mutt_default_from(sub);
  struct AddressList from_list = TAILQ_HEAD_INITIALIZER(from_list);
  mutt_addrlist_append(&from_list, from);

  /* mutt_default_from() does not use $realname if the real name is not set
   * in $from, so we add it here.  The reason it is not added in
   * mutt_default_from() is that during normal sending, we execute
   * send-hooks and set the realname last so that it can be changed based
   * upon message criteria.  */
  if (!from->personal)
  {
    const char *c_realname = cs_subset_string(sub, "realname");
    from->personal = mutt_str_dup(c_realname);
  }

  mutt_addrlist_qualify(&from_list, fqdn);

  rfc2047_encode_addrlist(&from_list, "Resent-From");
  if (mutt_addrlist_to_intl(&from_list, &err))
  {
    mutt_error(_("Bad IDN %s while preparing resent-from"), err);
    FREE(&err);
    mutt_addrlist_clear(&from_list);
    return -1;
  }
  mutt_addrlist_write(&from_list, resent_from, sizeof(resent_from), false);

#ifdef USE_NNTP
  OptNewsSend = false;
#endif

  /* prepare recipient list. idna conversion appears to happen before this
   * function is called, since the user receives confirmation of the address
   * list being bounced to.  */
  struct AddressList resent_to = TAILQ_HEAD_INITIALIZER(resent_to);
  mutt_addrlist_copy(&resent_to, to, false);
  rfc2047_encode_addrlist(&resent_to, "Resent-To");
  int rc = bounce_message(fp, e, &resent_to, resent_from, &from_list, sub);
  mutt_addrlist_clear(&resent_to);
  mutt_addrlist_clear(&from_list);

  return rc;
}

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set_noconv_flags()

static void set_noconv_flags ( struct Body *  b, bool  flag  )

static

Set/reset the "x-mutt-noconv" flag.

Parameters

b	Body of email
flag	If true, set the flag, otherwise remove it

Definition at line 1431 of file sendlib.c.

{
  for (; b; b = b->next)
  {
    if ((b->type == TYPE_MESSAGE) || (b->type == TYPE_MULTIPART))
      set_noconv_flags(b->parts, flag);
    else if ((b->type == TYPE_TEXT) && b->noconv)
    {
      if (flag)
        mutt_param_set(&b->parameter, "x-mutt-noconv", "yes");
      else
        mutt_param_delete(&b->parameter, "x-mutt-noconv");
    }
  }
}

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mutt_write_multiple_fcc()

int mutt_write_multiple_fcc	(	const char *	path,
		struct Email *	e,
		const char *	msgid,
		bool	post,
		char *	fcc,
		char **	finalpath,
		struct ConfigSubset *	sub
	)

Handle FCC with multiple, comma separated entries.

Parameters

[in]	path	Path to mailboxes (comma separated)
[in]	e	Email
[in]	msgid	Message id
[in]	post	If true, postpone message
[in]	fcc	fcc setting to save (postpone only)
[out]	finalpath	Final path of email
[in]	sub	Config Subset

Return values

0	Success
-1	Failure

Definition at line 1459 of file sendlib.c.

{
  char fcc_tok[PATH_MAX];
  char fcc_expanded[PATH_MAX];

  mutt_str_copy(fcc_tok, path, sizeof(fcc_tok));

  char *tok = strtok(fcc_tok, ",");
  if (!tok)
    return -1;

  mutt_debug(LL_DEBUG1, "Fcc: initial mailbox = '%s'\n", tok);
  /* mutt_expand_path already called above for the first token */
  int status = mutt_write_fcc(tok, e, msgid, post, fcc, finalpath, sub);
  if (status != 0)
    return status;

  while ((tok = strtok(NULL, ",")))
  {
    if (*tok == '\0')
      continue;

    /* Only call mutt_expand_path if tok has some data */
    mutt_debug(LL_DEBUG1, "Fcc: additional mailbox token = '%s'\n", tok);
    mutt_str_copy(fcc_expanded, tok, sizeof(fcc_expanded));
    mutt_expand_path(fcc_expanded, sizeof(fcc_expanded));
    mutt_debug(LL_DEBUG1, "     Additional mailbox expanded = '%s'\n", fcc_expanded);
    status = mutt_write_fcc(fcc_expanded, e, msgid, post, fcc, finalpath, sub);
    if (status != 0)
      return status;
  }

  return 0;
}

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mutt_write_fcc()

int mutt_write_fcc	(	const char *	path,
		struct Email *	e,
		const char *	msgid,
		bool	post,
		const char *	fcc,
		char **	finalpath,
		struct ConfigSubset *	sub
	)

Write email to FCC mailbox.

Parameters

[in]	path	Path to mailbox
[in]	e	Email
[in]	msgid	Message id
[in]	post	If true, postpone message, else fcc mode
[in]	fcc	fcc setting to save (postpone only)
[out]	finalpath	Final path of email
[in]	sub	Config Subset

Return values

0	Success
-1	Failure

Definition at line 1507 of file sendlib.c.

{
  struct Message *msg = NULL;
  struct Buffer *tempfile = NULL;
  FILE *fp_tmp = NULL;
  int rc = -1;
  bool need_mailbox_cleanup = false;
  struct stat st;
  MsgOpenFlags onm_flags;

  if (post)
    set_noconv_flags(e->body, true);

#ifdef RECORD_FOLDER_HOOK
  mutt_folder_hook(path, NULL);
#endif
  struct Mailbox *m_fcc = mx_path_resolve(path);
  bool old_append = m_fcc->append;
  struct Context *ctx_fcc = mx_mbox_open(m_fcc, MUTT_APPEND | MUTT_QUIET);
  if (!ctx_fcc)
  {
    mutt_debug(LL_DEBUG1, "unable to open mailbox %s in append-mode, aborting\n", path);
    mailbox_free(&m_fcc);
    goto done;
  }

  /* We need to add a Content-Length field to avoid problems where a line in
   * the message body begins with "From " */
  if ((ctx_fcc->mailbox->type == MUTT_MMDF) || (ctx_fcc->mailbox->type == MUTT_MBOX))
  {
    tempfile = mutt_buffer_pool_get();
    mutt_buffer_mktemp(tempfile);
    fp_tmp = mutt_file_fopen(mutt_b2s(tempfile), "w+");
    if (!fp_tmp)
    {
      mutt_perror(mutt_b2s(tempfile));
      mx_mbox_close(&ctx_fcc);
      goto done;
    }
    /* remember new mail status before appending message */
    need_mailbox_cleanup = true;
    stat(path, &st);
  }

  e->read = !post; /* make sure to put it in the 'cur' directory (maildir) */
  onm_flags = MUTT_ADD_FROM;
  if (post)
    onm_flags |= MUTT_SET_DRAFT;
  msg = mx_msg_open_new(ctx_fcc->mailbox, e, onm_flags);
  if (!msg)
  {
    mutt_file_fclose(&fp_tmp);
    mx_mbox_close(&ctx_fcc);
    goto done;
  }

  const bool c_crypt_protected_headers_read =
      cs_subset_bool(sub, "crypt_protected_headers_read");

  /* post == 1 => postpone message.
   * post == 0 => Normal mode.  */
  mutt_rfc822_write_header(
      msg->fp, e->env, e->body,
      post ? MUTT_WRITE_HEADER_POSTPONE : MUTT_WRITE_HEADER_FCC, false,
      c_crypt_protected_headers_read && mutt_should_hide_protected_subject(e), sub);

  /* (postponement) if this was a reply of some sort, <msgid> contains the
   * Message-ID: of message replied to.  Save it using a special X-Mutt-
   * header so it can be picked up if the message is recalled at a later
   * point in time.  This will allow the message to be marked as replied if
   * the same mailbox is still open.  */
  if (post && msgid)
    fprintf(msg->fp, "X-Mutt-References: %s\n", msgid);

  /* (postponement) save the Fcc: using a special X-Mutt- header so that
   * it can be picked up when the message is recalled */
  if (post && fcc)
    fprintf(msg->fp, "X-Mutt-Fcc: %s\n", fcc);

  if ((ctx_fcc->mailbox->type == MUTT_MMDF) || (ctx_fcc->mailbox->type == MUTT_MBOX))
    fprintf(msg->fp, "Status: RO\n");

  /* (postponement) if the mail is to be signed or encrypted, save this info */
  if (((WithCrypto & APPLICATION_PGP) != 0) && post && (e->security & APPLICATION_PGP))
  {
    fputs("X-Mutt-PGP: ", msg->fp);
    if (e->security & SEC_ENCRYPT)
      fputc('E', msg->fp);
    if (e->security & SEC_OPPENCRYPT)
      fputc('O', msg->fp);
    if (e->security & SEC_SIGN)
    {
      fputc('S', msg->fp);

      const char *c_pgp_sign_as = cs_subset_string(sub, "pgp_sign_as");
      if (c_pgp_sign_as)
        fprintf(msg->fp, "<%s>", c_pgp_sign_as);
    }
    if (e->security & SEC_INLINE)
      fputc('I', msg->fp);
#ifdef USE_AUTOCRYPT
    if (e->security & SEC_AUTOCRYPT)
      fputc('A', msg->fp);
    if (e->security & SEC_AUTOCRYPT_OVERRIDE)
      fputc('Z', msg->fp);
#endif
    fputc('\n', msg->fp);
  }

  /* (postponement) if the mail is to be signed or encrypted, save this info */
  if (((WithCrypto & APPLICATION_SMIME) != 0) && post && (e->security & APPLICATION_SMIME))
  {
    fputs("X-Mutt-SMIME: ", msg->fp);
    if (e->security & SEC_ENCRYPT)
    {
      fputc('E', msg->fp);

      const char *c_smime_encrypt_with =
          cs_subset_string(sub, "smime_encrypt_with");
      if (c_smime_encrypt_with)
        fprintf(msg->fp, "C<%s>", c_smime_encrypt_with);
    }
    if (e->security & SEC_OPPENCRYPT)
      fputc('O', msg->fp);
    if (e->security & SEC_SIGN)
    {
      fputc('S', msg->fp);

      const char *c_smime_sign_as = cs_subset_string(sub, "smime_sign_as");
      if (c_smime_sign_as)
        fprintf(msg->fp, "<%s>", c_smime_sign_as);
    }
    if (e->security & SEC_INLINE)
      fputc('I', msg->fp);
    fputc('\n', msg->fp);
  }

#ifdef MIXMASTER
  /* (postponement) if the mail is to be sent through a mixmaster
   * chain, save that information */

  if (post && !STAILQ_EMPTY(&e->chain))
  {
    fputs("X-Mutt-Mix:", msg->fp);
    struct ListNode *p = NULL;
    STAILQ_FOREACH(p, &e->chain, entries)
    {
      fprintf(msg->fp, " %s", (char *) p->data);
    }

    fputc('\n', msg->fp);
  }
#endif

  if (fp_tmp)
  {
    mutt_write_mime_body(e->body, fp_tmp, sub);

    /* make sure the last line ends with a newline.  Emacs doesn't ensure this
     * will happen, and it can cause problems parsing the mailbox later.  */
    fseek(fp_tmp, -1, SEEK_END);
    if (fgetc(fp_tmp) != '\n')
    {
      fseek(fp_tmp, 0, SEEK_END);
      fputc('\n', fp_tmp);
    }

    fflush(fp_tmp);
    if (ferror(fp_tmp))
    {
      mutt_debug(LL_DEBUG1, "%s: write failed\n", mutt_b2s(tempfile));
      mutt_file_fclose(&fp_tmp);
      unlink(mutt_b2s(tempfile));
      mx_msg_commit(ctx_fcc->mailbox, msg); /* XXX really? */
      mx_msg_close(ctx_fcc->mailbox, &msg);
      mx_mbox_close(&ctx_fcc);
      goto done;
    }

    /* count the number of lines */
    int lines = 0;
    char line_buf[1024];
    rewind(fp_tmp);
    while (fgets(line_buf, sizeof(line_buf), fp_tmp))
      lines++;
    fprintf(msg->fp, "Content-Length: " OFF_T_FMT "\n", (LOFF_T) ftello(fp_tmp));
    fprintf(msg->fp, "Lines: %d\n\n", lines);

    /* copy the body and clean up */
    rewind(fp_tmp);
    rc = mutt_file_copy_stream(fp_tmp, msg->fp);
    if (mutt_file_fclose(&fp_tmp) != 0)
      rc = -1;
    /* if there was an error, leave the temp version */
    if (rc >= 0)
    {
      unlink(mutt_b2s(tempfile));
      rc = 0;
    }
  }
  else
  {
    fputc('\n', msg->fp); /* finish off the header */
    rc = mutt_write_mime_body(e->body, msg->fp, sub);
  }

  if (mx_msg_commit(ctx_fcc->mailbox, msg) != 0)
    rc = -1;
  else if (finalpath)
    *finalpath = mutt_str_dup(msg->committed_path);
  mx_msg_close(ctx_fcc->mailbox, &msg);
  mx_mbox_close(&ctx_fcc);

  if (!post && need_mailbox_cleanup)
    mutt_mailbox_cleanup(path, &st);

  if (post)
    set_noconv_flags(e->body, false);

done:
  if (m_fcc)
    m_fcc->append = old_append;
#ifdef RECORD_FOLDER_HOOK
  /* We ran a folder hook for the destination mailbox,
   * now we run it for the user's current mailbox */
  if (Context && Context->mailbox->path)
    mutt_folder_hook(Context->mailbox->path, Context->mailbox->desc);
#endif

  if (fp_tmp)
  {
    mutt_file_fclose(&fp_tmp);
    unlink(mutt_b2s(tempfile));
  }
  mutt_buffer_pool_release(&tempfile);

  return rc;
}

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