sendlib.c File Reference

Miscellaneous functions for sending an email. More...

#include "config.h"
#include <errno.h>
#include <fcntl.h>
#include <iconv.h>
#include <inttypes.h>
#include <limits.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include "mutt/lib.h"
#include "address/lib.h"
#include "email/lib.h"
#include "core/lib.h"
#include "gui/lib.h"
#include "mutt.h"
#include "sendlib.h"
#include "context.h"
#include "copy.h"
#include "format_flags.h"
#include "globals.h"
#include "handler.h"
#include "mutt_mailbox.h"
#include "mutt_parse.h"
#include "muttlib.h"
#include "mx.h"
#include "options.h"
#include "pager.h"
#include "send.h"
#include "smtp.h"
#include "state.h"
#include "ncrypt/lib.h"
#include "nntp/lib.h"
#include "autocrypt/lib.h"

Include dependency graph for sendlib.c:

Go to the source code of this file.

Data Structures
struct	B64Context
	Cursor for the Base64 conversion. More...
struct	ContentState
	Info about the body of an email. More...
struct	UserHdrsOverride

Macros
#define	EX_OK   0
#define	MUTT_RANDTAG_LEN   16

Enumerations
enum	UserHdrsOverrideIdx { USERHDRS_OVERRIDE_CONTENT_TYPE, USERHDRS_OVERRIDE_USER_AGENT }

Functions
static void	encode_quoted (struct FgetConv *fc, FILE *fp_out, bool istext)
	Encode text as quoted printable. More...
static int	b64_init (struct B64Context *bctx)
	Set up the base64 conversion. More...
static void	b64_flush (struct B64Context *bctx, FILE *fp_out)
	Save the bytes to the file. More...
static void	b64_putc (struct B64Context *bctx, char c, FILE *fp_out)
	Base64-encode one character. More...
static void	encode_base64 (struct FgetConv *fc, FILE *fp_out, int istext)
	Base64-encode some data. More...
static void	encode_8bit (struct FgetConv *fc, FILE *fp_out)
	Write the data as raw 8-bit data. More...
int	mutt_write_mime_header (struct Body *a, FILE *fp)
	Create a MIME header. More...
static bool	write_as_text_part (struct Body *b)
	Should the Body be written as a text MIME part. More...
int	mutt_write_mime_body (struct Body *a, FILE *fp)
	Write a MIME part. More...
void	mutt_generate_boundary (struct ParameterList *pl)
	Create a unique boundary id for a MIME part. More...
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)
	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)
	Convert MIME parts to 7-bit. More...
void	mutt_message_to_7bit (struct Body *a, FILE *fp)
	Convert an email's MIME parts to 7-bit. More...
static void	set_encoding (struct Body *b, struct Content *info)
	determine which Content-Transfer-Encoding to use More...
void	mutt_stamp_attachment (struct Body *a)
	Timestamp an Attachment. More...
char *	mutt_body_get_charset (struct Body *b, char *buf, size_t buflen)
	Get a body's character set. More...
void	mutt_update_encoding (struct Body *a)
	Update the encoding type. More...
struct Body *	mutt_make_message_attach (struct Mailbox *m, struct Email *e, bool attach_msg)
	Create a message attachment. More...
static void	run_mime_type_query (struct Body *att)
	Run an external command to determine the MIME type. More...
struct Body *	mutt_make_file_attach (const char *path)
	Create a file attachment. More...
static int	get_toplevel_encoding (struct Body *a)
	Find the most restrictive encoding type. More...
static bool	check_boundary (const char *boundary, struct Body *b)
	check for duplicate boundary More...
struct Body *	mutt_make_multipart (struct Body *b)
	Create a multipart email. More...
struct Body *	mutt_remove_multipart (struct Body *b)
	Extract the multipart body if it exists. More...
void	mutt_write_addrlist (struct AddressList *al, FILE *fp, int linelen, bool display)
	Wrapper for mutt_write_address() More...
void	mutt_write_references (const struct ListHead *r, FILE *fp, size_t trim)
	Add the message references to a list. More...
static int	print_val (FILE *fp, const char *pfx, const char *value, CopyHeaderFlags chflags, size_t col)
	Add pieces to an email header, wrapping where necessary. More...
static int	fold_one_header (FILE *fp, const char *tag, const char *value, size_t vlen, const char *pfx, int wraplen, CopyHeaderFlags chflags)
	Fold one header line. More...
static char *	unfold_header (char *s)
	Unfold a wrapped email header. More...
static int	write_one_header (FILE *fp, int pfxw, int max, int wraplen, const char *pfx, const char *start, const char *end, CopyHeaderFlags chflags)
	Write out one header line. More...
int	mutt_write_one_header (FILE *fp, const char *tag, const char *value, const char *pfx, int wraplen, CopyHeaderFlags chflags)
	Write one header line to a file. More...
static int	userhdrs_override_cmp (const void *a, const void *b)
	Compare a user-defined header with an element of the userhdrs_override_headers list. More...
static struct UserHdrsOverride	write_userhdrs (FILE *fp, const struct ListHead *userhdrs, bool privacy)
	Write user-defined headers and keep track of the interesting ones. More...
int	mutt_rfc822_write_header (FILE *fp, struct Envelope *env, struct Body *attach, enum MuttWriteHeaderMode mode, bool privacy, bool hide_protected_subject)
	Write out one RFC822 header line. More...
static void	encode_headers (struct ListHead *h)
	RFC2047-encode a list of headers. More...
const char *	mutt_fqdn (bool may_hide_host)
	Get the Fully-Qualified Domain Name. More...
static char *	gen_msgid (void)
	Generate a unique Message ID. More...
static void	alarm_handler (int sig)
	Async notification of an alarm signal. More...
static int	send_msg (const char *path, char **args, const char *msg, char **tempfile)
	invoke sendmail in a subshell More...
static char **	add_args_one (char **args, size_t *argslen, size_t *argsmax, struct Address *addr)
	Add an Address to a dynamic array. More...
static char **	add_args (char **args, size_t *argslen, size_t *argsmax, struct AddressList *al)
	Add a list of Addresses to a dynamic array. More...
static char **	add_option (char **args, size_t *argslen, size_t *argsmax, char *s)
	Add a string to a dynamic array. More...
int	mutt_invoke_sendmail (struct AddressList *from, struct AddressList *to, struct AddressList *cc, struct AddressList *bcc, const char *msg, int eightbit)
	Run sendmail. More...
void	mutt_prepare_envelope (struct Envelope *env, bool final)
	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)
	Bounce an email message. More...
int	mutt_bounce_message (FILE *fp, struct Email *e, struct AddressList *to)
	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)
	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)
	Write email to FCC mailbox. More...

Variables
bool	C_Allow8bit
	Config: Allow 8-bit messages, don't use quoted-printable or base64. More...
char *	C_AttachCharset
	Config: When attaching files, use one of these character sets. More...
bool	C_BounceDelivered
	Config: Add 'Delivered-To' to bounced messages. More...
bool	C_EncodeFrom
	Config: Encode 'From ' as 'quote-printable' at the beginning of lines. More...
bool	C_ForwardDecrypt
	Config: Decrypt the message when forwarding it. More...
bool	C_HiddenHost
	Config: Don't use the hostname, just the domain, when generating the message id. More...
char *	C_Inews
	Config: (nntp) External command to post news articles. More...
bool	C_MimeForwardDecode
	Config: Decode the forwarded message before attaching it. More...
bool	C_MimeSubject
	Config: (nntp) Encode the article subject in base64. More...
char *	C_MimeTypeQueryCommand
	Config: External command to determine the MIME type of an attachment. More...
bool	C_MimeTypeQueryFirst
	Config: Run the C_MimeTypeQueryCommand before the mime.types lookup. More...
char *	C_Sendmail
	Config: External command to send email. More...
short	C_SendmailWait
	Config: Time to wait for sendmail to finish. More...
bool	C_Use8bitmime
	Config: Use 8-bit messages and ESMTP to send messages. More...
bool	C_UseEnvelopeFrom
	Config: Set the envelope sender of the message. More...
bool	C_UserAgent
	Config: Add a 'User-Agent' head to outgoing mail. More...
short	C_WrapHeaders
	Config: Width to wrap headers in outgoing messages. More...
static const char *const	userhdrs_override_headers []
	The next array/enum pair is used to to keep track of user headers that override pre-defined headers NeoMutt would emit. 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.

Macro Definition Documentation

EX_OK

#define EX_OK   0

Definition at line 73 of file sendlib.c.

MUTT_RANDTAG_LEN

#define MUTT_RANDTAG_LEN   16

Definition at line 98 of file sendlib.c.

Enumeration Type Documentation

UserHdrsOverrideIdx

enum UserHdrsOverrideIdx

Enumerator
USERHDRS_OVERRIDE_CONTENT_TYPE
USERHDRS_OVERRIDE_USER_AGENT

Definition at line 132 of file sendlib.c.

{
  USERHDRS_OVERRIDE_CONTENT_TYPE,
  USERHDRS_OVERRIDE_USER_AGENT,
};

Function Documentation

encode_quoted()

static void encode_quoted ( struct FgetConv *  fc, FILE *  fp_out, bool  istext  )

static

Encode text as quoted printable.

Parameters

fc	Cursor for converting a file's encoding
fp_out	File to store the result
istext	Is the input text?

Definition at line 149 of file sendlib.c.

{
  int c, linelen = 0;
  char line[77], savechar;

  while ((c = mutt_ch_fgetconv(fc)) != EOF)
  {
    /* Wrap the line if needed. */
    if ((linelen == 76) && ((istext && (c != '\n')) || !istext))
    {
      /* If the last character is "quoted", then be sure to move all three
       * characters to the next line.  Otherwise, just move the last
       * character...  */
      if (line[linelen - 3] == '=')
      {
        line[linelen - 3] = 0;
        fputs(line, fp_out);
        fputs("=\n", fp_out);
        line[linelen] = 0;
        line[0] = '=';
        line[1] = line[linelen - 2];
        line[2] = line[linelen - 1];
        linelen = 3;
      }
      else
      {
        savechar = line[linelen - 1];
        line[linelen - 1] = '=';
        line[linelen] = 0;
        fputs(line, fp_out);
        fputc('\n', fp_out);
        line[0] = savechar;
        linelen = 1;
      }
    }

    /* Escape lines that begin with/only contain "the message separator". */
    if ((linelen == 4) && mutt_str_startswith(line, "From", CASE_MATCH))
    {
      mutt_str_strfcpy(line, "=46rom", sizeof(line));
      linelen = 6;
    }
    else if ((linelen == 4) && mutt_str_startswith(line, "from", CASE_MATCH))
    {
      mutt_str_strfcpy(line, "=66rom", sizeof(line));
      linelen = 6;
    }
    else if ((linelen == 1) && (line[0] == '.'))
    {
      mutt_str_strfcpy(line, "=2E", sizeof(line));
      linelen = 3;
    }

    if ((c == '\n') && istext)
    {
      /* Check to make sure there is no trailing space on this line. */
      if ((linelen > 0) && ((line[linelen - 1] == ' ') || (line[linelen - 1] == '\t')))
      {
        if (linelen < 74)
        {
          sprintf(line + linelen - 1, "=%2.2X", (unsigned char) line[linelen - 1]);
          fputs(line, fp_out);
        }
        else
        {
          int savechar2 = line[linelen - 1];

          line[linelen - 1] = '=';
          line[linelen] = 0;
          fputs(line, fp_out);
          fprintf(fp_out, "\n=%2.2X", (unsigned char) savechar2);
        }
      }
      else
      {
        line[linelen] = 0;
        fputs(line, fp_out);
      }
      fputc('\n', fp_out);
      linelen = 0;
    }
    else if ((c != 9) && ((c < 32) || (c > 126) || (c == '=')))
    {
      /* Check to make sure there is enough room for the quoted character.
       * If not, wrap to the next line.  */
      if (linelen > 73)
      {
        line[linelen++] = '=';
        line[linelen] = 0;
        fputs(line, fp_out);
        fputc('\n', fp_out);
        linelen = 0;
      }
      sprintf(line + linelen, "=%2.2X", (unsigned char) c);
      linelen += 3;
    }
    else
    {
      /* Don't worry about wrapping the line here.  That will happen during
       * the next iteration when I'll also know what the next character is.  */
      line[linelen++] = c;
    }
  }

  /* Take care of anything left in the buffer */
  if (linelen > 0)
  {
    if ((line[linelen - 1] == ' ') || (line[linelen - 1] == '\t'))
    {
      /* take care of trailing whitespace */
      if (linelen < 74)
        sprintf(line + linelen - 1, "=%2.2X", (unsigned char) line[linelen - 1]);
      else
      {
        savechar = line[linelen - 1];
        line[linelen - 1] = '=';
        line[linelen] = 0;
        fputs(line, fp_out);
        fputc('\n', fp_out);
        sprintf(line, "=%2.2X", (unsigned char) savechar);
      }
    }
    else
      line[linelen] = 0;
    fputs(line, fp_out);
  }
}

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b64_init()

static int b64_init ( struct B64Context *  bctx )

static

Set up the base64 conversion.

Parameters

bctx	Cursor for the base64 conversion

Return values

0

Always

Definition at line 282 of file sendlib.c.

{
  memset(bctx->buffer, '\0', sizeof(bctx->buffer));
  bctx->size = 0;
  bctx->linelen = 0;

  return 0;
}

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b64_flush()

static void b64_flush ( struct B64Context *  bctx, FILE *  fp_out  )

static

Save the bytes to the file.

Parameters

bctx	Cursor for the base64 conversion
fp_out	File to save the output

Definition at line 296 of file sendlib.c.

{
  /* for some reasons, mutt_b64_encode expects the
   * output buffer to be larger than 10B */
  char encoded[11];
  size_t ret;

  if (bctx->size == 0)
    return;

  if (bctx->linelen >= 72)
  {
    fputc('\n', fp_out);
    bctx->linelen = 0;
  }

  /* ret should always be equal to 4 here, because bctx->size
   * is a value between 1 and 3 (included), but let's not hardcode it
   * and prefer the return value of the function */
  ret = mutt_b64_encode(bctx->buffer, bctx->size, encoded, sizeof(encoded));
  for (size_t i = 0; i < ret; i++)
  {
    fputc(encoded[i], fp_out);
    bctx->linelen++;
  }

  bctx->size = 0;
}

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b64_putc()

static void b64_putc ( struct B64Context *  bctx, char  c, FILE *  fp_out  )

static

Base64-encode one character.

Parameters

bctx	Cursor for the base64 conversion
c	Character to encode
fp_out	File to save the output

Definition at line 331 of file sendlib.c.

{
  if (bctx->size == 3)
    b64_flush(bctx, fp_out);

  bctx->buffer[bctx->size++] = c;
}

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encode_base64()

static void encode_base64 ( struct FgetConv *  fc, FILE *  fp_out, int  istext  )

static

Base64-encode some data.

Parameters

fc	Cursor for converting a file's encoding
fp_out	File to store the result
istext	Is the input text?

Definition at line 345 of file sendlib.c.

{
  struct B64Context bctx;
  int ch, ch1 = EOF;

  b64_init(&bctx);

  while ((ch = mutt_ch_fgetconv(fc)) != EOF)
  {
    if (SigInt == 1)
    {
      SigInt = 0;
      return;
    }
    if (istext && (ch == '\n') && (ch1 != '\r'))
      b64_putc(&bctx, '\r', fp_out);
    b64_putc(&bctx, ch, fp_out);
    ch1 = ch;
  }
  b64_flush(&bctx, fp_out);
  fputc('\n', fp_out);
}

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encode_8bit()

static void encode_8bit ( struct FgetConv *  fc, FILE *  fp_out  )

static

Write the data as raw 8-bit data.

Parameters

fc	Cursor for converting a file's encoding
fp_out	File to store the result

Definition at line 373 of file sendlib.c.

{
  int ch;

  while ((ch = mutt_ch_fgetconv(fc)) != EOF)
  {
    if (SigInt == 1)
    {
      SigInt = 0;
      return;
    }
    fputc(ch, fp_out);
  }
}

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mutt_write_mime_header()

int mutt_write_mime_header	(	struct Body *	a,
		FILE *	fp
	)

Create a MIME header.

Parameters

a	Body part
fp	File to write to

Return values

0	Success
-1	Failure

Definition at line 395 of file sendlib.c.

{
  if (!a || !fp)
    return -1;

  int len;
  int tmplen;
  char buf[256] = { 0 };

  fprintf(fp, "Content-Type: %s/%s", TYPE(a), a->subtype);

  if (!TAILQ_EMPTY(&a->parameter))
  {
    len = 25 + mutt_str_strlen(a->subtype); /* approximate len. of content-type */

    struct Parameter *np = NULL;
    TAILQ_FOREACH(np, &a->parameter, entries)
    {
      if (!np->attribute || !np->value)
        continue;

      struct ParameterList pl_conts = rfc2231_encode_string(np->attribute, np->value);
      struct Parameter *cont = NULL;
      TAILQ_FOREACH(cont, &pl_conts, entries)
      {
        fputc(';', fp);

        buf[0] = 0;
        mutt_addr_cat(buf, sizeof(buf), cont->value, MimeSpecials);

        /* Dirty hack to make messages readable by Outlook Express
         * for the Mac: force quotes around the boundary parameter
         * even when they aren't needed.  */
        if (!mutt_str_strcasecmp(cont->attribute, "boundary") &&
            !mutt_str_strcmp(buf, cont->value))
          snprintf(buf, sizeof(buf), "\"%s\"", cont->value);

        tmplen = mutt_str_strlen(buf) + mutt_str_strlen(cont->attribute) + 1;
        if (len + tmplen + 2 > 76)
        {
          fputs("\n\t", fp);
          len = tmplen + 1;
        }
        else
        {
          fputc(' ', fp);
          len += tmplen + 1;
        }

        fprintf(fp, "%s=%s", cont->attribute, buf);
      }

      mutt_param_free(&pl_conts);
    }
  }

  fputc('\n', fp);

  if (a->language)
    fprintf(fp, "Content-Language: %s\n", a->language);

  if (a->description)
    fprintf(fp, "Content-Description: %s\n", a->description);

  if (a->disposition != DISP_NONE)
  {
    const char *dispstr[] = { "inline", "attachment", "form-data" };

    if (a->disposition < sizeof(dispstr) / sizeof(char *))
    {
      fprintf(fp, "Content-Disposition: %s", dispstr[a->disposition]);
      len = 21 + mutt_str_strlen(dispstr[a->disposition]);

      if (a->use_disp && (a->disposition != DISP_INLINE))
      {
        char *fn = a->d_filename;
        if (!fn)
          fn = a->filename;

        if (fn)
        {
          /* Strip off the leading path... */
          char *t = strrchr(fn, '/');
          if (t)
            t++;
          else
            t = fn;

          struct ParameterList pl_conts = rfc2231_encode_string("filename", t);
          struct Parameter *cont = NULL;
          TAILQ_FOREACH(cont, &pl_conts, entries)
          {
            fputc(';', fp);
            buf[0] = 0;
            mutt_addr_cat(buf, sizeof(buf), cont->value, MimeSpecials);

            tmplen = mutt_str_strlen(buf) + mutt_str_strlen(cont->attribute) + 1;
            if (len + tmplen + 2 > 76)
            {
              fputs("\n\t", fp);
              len = tmplen + 1;
            }
            else
            {
              fputc(' ', fp);
              len += tmplen + 1;
            }

            fprintf(fp, "%s=%s", cont->attribute, buf);
          }

          mutt_param_free(&pl_conts);
        }
      }

      fputc('\n', fp);
    }
    else
    {
      mutt_debug(LL_DEBUG1, "ERROR: invalid content-disposition %d\n", a->disposition);
    }
  }

  if (a->encoding != ENC_7BIT)
    fprintf(fp, "Content-Transfer-Encoding: %s\n", ENCODING(a->encoding));

  if ((C_CryptProtectedHeadersWrite
#ifdef USE_AUTOCRYPT
       || C_Autocrypt
#endif
       ) &&
      a->mime_headers)
  {
    mutt_rfc822_write_header(fp, a->mime_headers, NULL, MUTT_WRITE_HEADER_MIME, false, false);
  }

  /* Do NOT add the terminator here!!! */
  return ferror(fp) ? -1 : 0;
}

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write_as_text_part()

static bool write_as_text_part ( struct Body *  b )

static

Should the Body be written as a text MIME part.

Parameters

b	Email to examine

Return values

true	If the Body should be written as text

Definition at line 540 of file sendlib.c.

{
  return mutt_is_text_part(b) ||
         (((WithCrypto & APPLICATION_PGP) != 0) && mutt_is_application_pgp(b));
}

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mutt_write_mime_body()

int mutt_write_mime_body	(	struct Body *	a,
		FILE *	fp
	)

Write a MIME part.

Parameters

a	Body to use
fp	File to write to

Return values

0	Success
-1	Failure

Definition at line 553 of file sendlib.c.

{
  FILE *fp_in = NULL;
  struct FgetConv *fc = NULL;

  if (a->type == TYPE_MULTIPART)
  {
    /* First, find the boundary to use */
    const char *p = mutt_param_get(&a->parameter, "boundary");
    if (!p)
    {
      mutt_debug(LL_DEBUG1, "no boundary parameter found\n");
      mutt_error(_("No boundary parameter found [report this error]"));
      return -1;
    }
    char boundary[128];
    mutt_str_strfcpy(boundary, p, sizeof(boundary));

    for (struct Body *t = a->parts; t; t = t->next)
    {
      fprintf(fp, "\n--%s\n", boundary);
      if (mutt_write_mime_header(t, fp) == -1)
        return -1;
      fputc('\n', fp);
      if (mutt_write_mime_body(t, fp) == -1)
        return -1;
    }
    fprintf(fp, "\n--%s--\n", boundary);
    return ferror(fp) ? -1 : 0;
  }

  /* This is pretty gross, but it's the best solution for now... */
  if (((WithCrypto & APPLICATION_PGP) != 0) && (a->type == TYPE_APPLICATION) &&
      (mutt_str_strcmp(a->subtype, "pgp-encrypted") == 0) && !a->filename)
  {
    fputs("Version: 1\n", fp);
    return 0;
  }

  fp_in = fopen(a->filename, "r");
  if (!fp_in)
  {
    mutt_debug(LL_DEBUG1, "%s no longer exists\n", a->filename);
    mutt_error(_("%s no longer exists"), a->filename);
    return -1;
  }

  if ((a->type == TYPE_TEXT) && (!a->noconv))
  {
    char send_charset[128];
    fc = mutt_ch_fgetconv_open(
        fp_in, a->charset,
        mutt_body_get_charset(a, send_charset, sizeof(send_charset)), 0);
  }
  else
    fc = mutt_ch_fgetconv_open(fp_in, 0, 0, 0);

  mutt_sig_allow_interrupt(true);
  if (a->encoding == ENC_QUOTED_PRINTABLE)
    encode_quoted(fc, fp, write_as_text_part(a));
  else if (a->encoding == ENC_BASE64)
    encode_base64(fc, fp, write_as_text_part(a));
  else if ((a->type == TYPE_TEXT) && (!a->noconv))
    encode_8bit(fc, fp);
  else
    mutt_file_copy_stream(fp_in, fp);
  mutt_sig_allow_interrupt(false);

  mutt_ch_fgetconv_close(&fc);
  mutt_file_fclose(&fp_in);

  if (SigInt == 1)
  {
    SigInt = 0;
    return -1;
  }
  return ferror(fp) ? -1 : 0;
}

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mutt_generate_boundary()

void mutt_generate_boundary

(

struct ParameterList *

pl

)

Create a unique boundary id for a MIME part.

Parameters

pl

MIME part

Definition at line 636 of file sendlib.c.

{
  char rs[MUTT_RANDTAG_LEN + 1];

  mutt_rand_base32(rs, sizeof(rs) - 1);
  rs[MUTT_RANDTAG_LEN] = 0;
  mutt_param_set(pl, "boundary", rs);
}

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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 652 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 799 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_str_strcasecmp(tocodes[i], "utf-8") != 0)
      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 952 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;
    tcode[i] = mutt_str_substr_dup(c, c1);
  }

  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;
      fcode = mutt_str_substr_dup(c, c1);

      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
	)

Analyze file to determine MIME encoding to use.

Parameters

fname	File to examine
b	Body to update

Return values

ptr	Newly allocated Content

Also set the body charset, sometimes, or not.

Definition at line 1031 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 (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));

  if (b && (b->type == TYPE_TEXT) && (!b->noconv && !b->force_charset))
  {
    char *chs = mutt_param_get(&b->parameter, "charset");
    char *fchs = b->use_disp ? (C_AttachCharset ? C_AttachCharset : C_Charset) : C_Charset;
    if (C_Charset && (chs || C_SendCharset) &&
        (convert_file_from_to(fp, fchs, chs ? chs : C_SendCharset, &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 1119 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_strlen(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_strfcpy(buf, "/etc/mime.types", sizeof(buf));
        break;
      case 1:
        mutt_str_strfcpy(buf, SYSCONFDIR "/mime.types", sizeof(buf));
        break;
      case 2:
        mutt_str_strfcpy(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_strlen(p);
          if ((sze > cur_sze) && (szf >= sze) &&
              (mutt_str_strcasecmp(path + szf - sze, p) == 0) &&
              ((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++)
              ;

            mutt_str_substr_copy(p, q, subtype, sizeof(subtype));

            type = mutt_check_mime_type(ct);
            if (type == TYPE_OTHER)
              mutt_str_strfcpy(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  )

static

Convert MIME parts to 7-bit.

Parameters

a	Body of the email
fp_in	File to read

Definition at line 1239 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);
    }
    else if (mutt_is_message_type(a->type, a->subtype))
    {
      mutt_message_to_7bit(a, fp_in);
    }
    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);
      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
	)

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

Parameters

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

Definition at line 1301 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);

  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);
  fputc('\n', fp_out);
  mutt_write_mime_body(a->parts, fp_out);

  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->content = 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  )

static

determine which Content-Transfer-Encoding to use

Parameters

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

Definition at line 1387 of file sendlib.c.

{
  if (b->type == TYPE_TEXT)
  {
    char send_charset[128];
    char *chsname = mutt_body_get_charset(b, send_charset, sizeof(send_charset));
    if ((info->lobin && !mutt_str_startswith(chsname, "iso-2022", CASE_IGNORE)) ||
        (info->linemax > 990) || (info->from && C_EncodeFrom))
    {
      b->encoding = ENC_QUOTED_PRINTABLE;
    }
    else if (info->hibin)
    {
      b->encoding = C_Allow8bit ? 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_Allow8bit && !info->lobin)
        b->encoding = ENC_8BIT;
      else
        mutt_message_to_7bit(b, NULL);
    }
    else
      b->encoding = ENC_7BIT;
  }
  else if ((b->type == TYPE_APPLICATION) &&
           (mutt_str_strcasecmp(b->subtype, "pgp-keys") == 0))
  {
    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 1443 of file sendlib.c.

{
  a->stamp = mutt_date_epoch();
}

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mutt_body_get_charset()

char* mutt_body_get_charset	(	struct Body *	b,
		char *	buf,
		size_t	buflen
	)

Get a body's character set.

Parameters

b	Body to examine
buf	Buffer for the result
buflen	Length of the buffer

Return values

ptr	Buffer containing character set
NULL	On error, or if not a text type

Definition at line 1456 of file sendlib.c.

{
  char *p = NULL;

  if (b && (b->type != TYPE_TEXT))
    return NULL;

  if (b)
    p = mutt_param_get(&b->parameter, "charset");

  if (p)
    mutt_ch_canonical_charset(buf, buflen, p);
  else
    mutt_str_strfcpy(buf, "us-ascii", buflen);

  return buf;
}

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mutt_update_encoding()

void mutt_update_encoding

(

struct Body *

a

)

Update the encoding type.

Parameters

a	Body to update

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

Definition at line 1480 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);
  if (!info)
    return;

  set_encoding(a, info);
  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
	)

Create a message attachment.

Parameters

m	Mailbox
e	Email
attach_msg	true if attaching a message

Return values

ptr	Newly allocated Body
NULL	Error

Definition at line 1511 of file sendlib.c.

{
  char buf[1024];
  struct Body *body = NULL;
  FILE *fp = NULL;
  CopyMessageFlags cmflags;
  SecurityFlags pgp = WithCrypto ? e->security : SEC_NO_FLAGS;

  if (WithCrypto)
  {
    if ((C_MimeForwardDecode || C_ForwardDecrypt) && (e->security & SEC_ENCRYPT))
    {
      if (!crypt_valid_passphrase(e->security))
        return NULL;
    }
  }

  mutt_mktemp(buf, sizeof(buf));
  fp = mutt_file_fopen(buf, "w+");
  if (!fp)
    return NULL;

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

  mutt_parse_mime_message(m, e);

  CopyHeaderFlags chflags = CH_XMIT;
  cmflags = MUTT_CM_NO_FLAGS;

  /* If we are attaching a message, ignore C_MimeForwardDecode */
  if (!attach_msg && C_MimeForwardDecode)
  {
    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_ForwardDecrypt && (e->security & SEC_ENCRYPT))
  {
    if (((WithCrypto & APPLICATION_PGP) != 0) && mutt_is_multipart_encrypted(e->content))
    {
      chflags |= CH_MIME | CH_NONEWLINE;
      cmflags = MUTT_CM_DECODE_PGP;
      pgp &= ~PGP_ENCRYPT;
    }
    else if (((WithCrypto & APPLICATION_PGP) != 0) &&
             ((mutt_is_application_pgp(e->content) & 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->content) & 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);
  body->parts = body->email->content;

  mutt_file_fclose(&fp);

  return body;
}

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run_mime_type_query()

static void run_mime_type_query ( struct Body *  att )

static

Run an external command to determine the MIME type.

Parameters

att	Attachment

The command in $mime_type_query_command is run.

Definition at line 1606 of file sendlib.c.

{
  FILE *fp = NULL, *fp_err = NULL;
  char *buf = NULL;
  size_t buflen;
  int dummy = 0;
  pid_t pid;
  struct Buffer *cmd = mutt_buffer_pool_get();

  mutt_buffer_file_expand_fmt_quote(cmd, C_MimeTypeQueryCommand, 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, &dummy, 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

)

Create a file attachment.

Parameters

path	File to attach

Return values

ptr	Newly allocated Body
NULL	Error

Definition at line 1645 of file sendlib.c.

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

  if (C_MimeTypeQueryCommand && C_MimeTypeQueryFirst)
    run_mime_type_query(att);

  /* 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_MimeTypeQueryCommand && !C_MimeTypeQueryFirst)
  {
    run_mime_type_query(att);
  }

  struct Content *info = mutt_get_content_info(path, att);
  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_strdup("plain");
    }
    else
    {
      att->type = TYPE_APPLICATION;
      att->subtype = mutt_str_strdup("octet-stream");
    }
  }

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

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get_toplevel_encoding()

static int get_toplevel_encoding ( struct Body *  a )

static

Find the most restrictive encoding type.

Parameters

a	Body to examine

Return values

num	Encoding type, e.g. ENC_7BIT

Definition at line 1697 of file sendlib.c.

{
  int e = ENC_7BIT;

  for (; a; a = a->next)
  {
    if (a->encoding == ENC_BINARY)
      return ENC_BINARY;
    if (a->encoding == ENC_8BIT)
      e = ENC_8BIT;
  }

  return e;
}

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check_boundary()

static bool check_boundary ( const char *  boundary, struct Body *  b  )

static

check for duplicate boundary

Parameters

boundary	Boundary to look for
b	Body parts to check

Return values

true	if duplicate found

Definition at line 1718 of file sendlib.c.

{
  char *p = NULL;

  if (b->parts && check_boundary(boundary, b->parts))
    return true;

  if (b->next && check_boundary(boundary, b->next))
    return true;

  p = mutt_param_get(&b->parameter, "boundary");
  if (p && (mutt_str_strcmp(p, boundary) == 0))
  {
    return true;
  }
  return false;
}

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mutt_make_multipart()

struct Body* mutt_make_multipart

(

struct Body *

b

)

Create a multipart email.

Parameters

b	Body of email to start

Return values

ptr	Newly allocated Body

Definition at line 1741 of file sendlib.c.

{
  struct Body *new_body = mutt_body_new();
  new_body->type = TYPE_MULTIPART;
  new_body->subtype = mutt_str_strdup("mixed");
  new_body->encoding = get_toplevel_encoding(b);
  do
  {
    mutt_generate_boundary(&new_body->parameter);
    if (check_boundary(mutt_param_get(&new_body->parameter, "boundary"), b))
      mutt_param_delete(&new_body->parameter, "boundary");
  } while (!mutt_param_get(&new_body->parameter, "boundary"));
  new_body->use_disp = false;
  new_body->disposition = DISP_INLINE;
  new_body->parts = b;

  return new_body;
}

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mutt_remove_multipart()

struct Body* mutt_remove_multipart

(

struct Body *

b

)

Extract the multipart body if it exists.

Parameters

b	Body to alter

Return values

ptr	The parts of the Body

Note

The original Body is freed

Definition at line 1767 of file sendlib.c.

{
  struct Body *t = NULL;

  if (b->parts)
  {
    t = b;
    b = b->parts;
    t->parts = NULL;
    mutt_body_free(&t);
  }
  return b;
}

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mutt_write_addrlist()

void mutt_write_addrlist	(	struct AddressList *	al,
		FILE *	fp,
		int	linelen,
		bool	display
	)

Wrapper for mutt_write_address()

Parameters

al	Address list
fp	File to write to
linelen	Line length to use
display	True if these addresses will be displayed to the user

So we can handle very large recipient lists without needing a huge temporary buffer in memory

Definition at line 1791 of file sendlib.c.

{
  char buf[1024];
  int count = 0;

  struct Address *a = NULL;
  TAILQ_FOREACH(a, al, entries)
  {
    buf[0] = '\0';
    mutt_addr_write(buf, sizeof(buf), a, display);
    size_t len = mutt_str_strlen(buf);
    if (count && (linelen + len > 74))
    {
      fputs("\n\t", fp);
      linelen = len + 8; /* tab is usually about 8 spaces... */
    }
    else
    {
      if (count && a->mailbox)
      {
        fputc(' ', fp);
        linelen++;
      }
      linelen += len;
    }
    fputs(buf, fp);
    struct Address *next = TAILQ_NEXT(a, entries);
    if (!a->group && next && next->mailbox)
    {
      linelen++;
      fputc(',', fp);
    }
    count++;
  }
  fputc('\n', fp);
}

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mutt_write_references()

void mutt_write_references	(	const struct ListHead *	r,
		FILE *	fp,
		size_t	trim
	)

Add the message references to a list.

Parameters

r	String List of references
fp	File to write to
trim	Trim the list to at most this many items

Write the list in reverse because they are stored in reverse order when parsed to speed up threading.

Definition at line 1837 of file sendlib.c.

{
  struct ListNode *np = NULL;
  size_t length = 0;

  STAILQ_FOREACH(np, r, entries)
  {
    if (++length == trim)
      break;
  }

  struct ListNode **ref = mutt_mem_calloc(length, sizeof(struct ListNode *));

  // store in reverse order
  size_t tmp = length;
  STAILQ_FOREACH(np, r, entries)
  {
    ref[--tmp] = np;
    if (tmp == 0)
      break;
  }

  for (size_t i = 0; i < length; i++)
  {
    fputc(' ', fp);
    fputs(ref[i]->data, fp);
    if (i != length - 1)
      fputc('\n', fp);
  }

  FREE(&ref);
}

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print_val()

static int print_val ( FILE *  fp, const char *  pfx, const char *  value, CopyHeaderFlags  chflags, size_t  col  )

static

Add pieces to an email header, wrapping where necessary.

Parameters

fp	File to write to
pfx	Prefix for headers
value	Text to be added
chflags	Flags, see CopyHeaderFlags
col	Column that this text starts at

Return values

0	Success
-1	Failure

Definition at line 1880 of file sendlib.c.

{
  while (value && (value[0] != '\0'))
  {
    if (fputc(*value, fp) == EOF)
      return -1;
    /* corner-case: break words longer than 998 chars by force,
     * mandated by RFC5322 */
    if (!(chflags & CH_DISPLAY) && (++col >= 998))
    {
      if (fputs("\n ", fp) < 0)
        return -1;
      col = 1;
    }
    if (*value == '\n')
    {
      if ((value[1] != '\0') && pfx && (pfx[0] != '\0') && (fputs(pfx, fp) == EOF))
        return -1;
      /* for display, turn folding spaces into folding tabs */
      if ((chflags & CH_DISPLAY) && ((value[1] == ' ') || (value[1] == '\t')))
      {
        value++;
        while ((value[0] != '\0') && ((value[0] == ' ') || (value[0] == '\t')))
          value++;
        if (fputc('\t', fp) == EOF)
          return -1;
        continue;
      }
    }
    value++;
  }
  return 0;
}

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fold_one_header()

static int fold_one_header ( FILE *  fp, const char *  tag, const char *  value, size_t  vlen, const char *  pfx, int  wraplen, CopyHeaderFlags  chflags  )

static

Fold one header line.

Parameters

fp	File to write to
tag	Header key, e.g. "From"
value	Header value
vlen	Length of the header value string
pfx	Prefix for header
wraplen	Column to wrap at
chflags	Flags, see CopyHeaderFlags

Return values

0	Success
-1	Failure

Definition at line 1927 of file sendlib.c.

{
  if (!value || !*value || !vlen)
    return 0;

  const char *p = value;
  char buf[8192] = { 0 };
  int first = 1, col = 0, l = 0;
  const bool display = (chflags & CH_DISPLAY);

  mutt_debug(LL_DEBUG5, "pfx=[%s], tag=[%s], flags=%d value=[%.*s]\n", pfx, tag,
             chflags, ((value[vlen - 1] == '\n') ? vlen - 1 : vlen), value);

  if (tag && *tag && (fprintf(fp, "%s%s: ", NONULL(pfx), tag) < 0))
    return -1;
  col = mutt_str_strlen(tag) + ((tag && (tag[0] != '\0')) ? 2 : 0) + mutt_str_strlen(pfx);

  while (p && (p[0] != '\0'))
  {
    int fold = 0;

    /* find the next word and place it in 'buf'. it may start with
     * whitespace we can fold before */
    const char *next = mutt_str_find_word(p);
    l = MIN(sizeof(buf) - 1, next - p);
    memcpy(buf, p, l);
    buf[l] = '\0';

    /* determine width: character cells for display, bytes for sending
     * (we get pure ascii only) */
    const int w = mutt_mb_width(buf, col, display);
    const int enc = mutt_str_startswith(buf, "=?", CASE_MATCH);

    mutt_debug(LL_DEBUG5, "word=[%s], col=%d, w=%d, next=[0x0%x]\n",
               (buf[0] == '\n' ? "\\n" : buf), col, w, *next);

    /* insert a folding \n before the current word's lwsp except for
     * header name, first word on a line (word longer than wrap width)
     * and encoded words */
    if (!first && !enc && col && ((col + w) >= wraplen))
    {
      col = mutt_str_strlen(pfx);
      fold = 1;
      if (fprintf(fp, "\n%s", NONULL(pfx)) <= 0)
        return -1;
    }

    /* print the actual word; for display, ignore leading ws for word
     * and fold with tab for readability */
    if (display && fold)
    {
      char *pc = buf;
      while ((pc[0] != '\0') && ((pc[0] == ' ') || (pc[0] == '\t')))
      {
        pc++;
        col--;
      }
      if (fputc('\t', fp) == EOF)
        return -1;
      if (print_val(fp, pfx, pc, chflags, col) < 0)
        return -1;
      col += 8;
    }
    else if (print_val(fp, pfx, buf, chflags, col) < 0)
      return -1;
    col += w;

    /* if the current word ends in \n, ignore all its trailing spaces
     * and reset column; this prevents us from putting only spaces (or
     * even none) on a line if the trailing spaces are located at our
     * current line width
     * XXX this covers ASCII space only, for display we probably
     * want something like iswspace() here */
    const char *sp = next;
    while ((sp[0] != '\0') && ((sp[0] == ' ') || (sp[0] == '\t')))
      sp++;
    if (sp[0] == '\n')
    {
      if (sp[1] == '\0')
        break;
      next = sp;
      col = 0;
    }

    p = next;
    first = 0;
  }

  /* if we have printed something but didn't \n-terminate it, do it
   * except the last word we printed ended in \n already */
  if (col && ((l == 0) || (buf[l - 1] != '\n')))
    if (putc('\n', fp) == EOF)
      return -1;

  return 0;
}

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unfold_header()

static char* unfold_header ( char *  s )

static

Unfold a wrapped email header.

Parameters

s	String to process

Return values

ptr	Unfolded string

Note

The string is altered in-place

Definition at line 2032 of file sendlib.c.

{
  char *p = s;
  char *q = s;

  while (p && (p[0] != '\0'))
  {
    /* remove CRLF prior to FWSP, turn \t into ' ' */
    if ((p[0] == '\r') && (p[1] == '\n') && ((p[2] == ' ') || (p[2] == '\t')))
    {
      *q++ = ' ';
      p += 3;
      continue;
    }
    /* remove LF prior to FWSP, turn \t into ' ' */
    else if ((p[0] == '\n') && ((p[1] == ' ') || (p[1] == '\t')))
    {
      *q++ = ' ';
      p += 2;
      continue;
    }
    *q++ = *p++;
  }
  if (q)
    q[0] = '\0';

  return s;
}

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write_one_header()

static int write_one_header ( FILE *  fp, int  pfxw, int  max, int  wraplen, const char *  pfx, const char *  start, const char *  end, CopyHeaderFlags  chflags  )

static

Write out one header line.

Parameters

fp	File to write to
pfxw	Width of prefix string
max	Max width
wraplen	Column to wrap at
pfx	Prefix for header
start	Start of header line
end	End of header line
chflags	Flags, see CopyHeaderFlags

Return values

0	Success
-1	Failure

Definition at line 2074 of file sendlib.c.

{
  const char *t = strchr(start, ':');
  if (!t || (t > end))
  {
    mutt_debug(LL_DEBUG1, "#2 warning: header not in 'key: value' format!\n");
    return 0;
  }

  const size_t vallen = end - start;
  const bool short_enough = (pfxw + max <= wraplen);

  mutt_debug((short_enough ? LL_DEBUG2 : LL_DEBUG5), "buf[%s%.*s] %s, max width = %d %s %d\n",
             NONULL(pfx), vallen - 1 /* skip newline */, start,
             (short_enough ? "short enough" : "too long"), max,
             (short_enough ? "<=" : ">"), wraplen);

  int rc = 0;
  const char *valbuf = NULL, *tagbuf = NULL;
  const bool is_from = (vallen > 5) && mutt_str_startswith(start, "from ", CASE_IGNORE);

  /* only pass through folding machinery if necessary for sending,
   * never wrap From_ headers on sending */
  if (!(chflags & CH_DISPLAY) && (short_enough || is_from))
  {
    if (pfx && *pfx)
    {
      if (fputs(pfx, fp) == EOF)
      {
        return -1;
      }
    }

    valbuf = mutt_str_substr_dup(start, end);
    rc = print_val(fp, pfx, valbuf, chflags, mutt_str_strlen(pfx));
  }
  else
  {
    if (!is_from)
    {
      tagbuf = mutt_str_substr_dup(start, t);
      /* skip over the colon separating the header field name and value */
      t++;

      /* skip over any leading whitespace (WSP, as defined in RFC5322)
       * NOTE: mutt_str_skip_email_wsp() does the wrong thing here.
       *       See tickets 3609 and 3716. */
      while ((*t == ' ') || (*t == '\t'))
        t++;
    }
    valbuf = mutt_str_substr_dup(is_from ? start : t, end);
    rc = fold_one_header(fp, tagbuf, valbuf, end - (is_from ? start : t), pfx,
                         wraplen, chflags);
  }

  FREE(&tagbuf);
  FREE(&valbuf);
  return rc;
}

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mutt_write_one_header()

int mutt_write_one_header	(	FILE *	fp,
		const char *	tag,
		const char *	value,
		const char *	pfx,
		int	wraplen,
		CopyHeaderFlags	chflags
	)

Write one header line to a file.

Parameters

fp	File to write to
tag	Header key, e.g. "From"
value	Header value
pfx	Prefix for header
wraplen	Column to wrap at
chflags	Flags, see CopyHeaderFlags

Return values

0	Success
-1	Failure

split several headers into individual ones and call write_one_header for each one

Definition at line 2149 of file sendlib.c.

{
  char *last = NULL, *line = NULL;
  int max = 0, w, rc = -1;
  int pfxw = mutt_strwidth(pfx);
  char *v = mutt_str_strdup(value);
  bool display = (chflags & CH_DISPLAY);

  if (!display || C_Weed)
    v = unfold_header(v);

  /* when not displaying, use sane wrap value */
  if (!display)
  {
    if ((C_WrapHeaders < 78) || (C_WrapHeaders > 998))
      wraplen = 78;
    else
      wraplen = C_WrapHeaders;
  }
  else if (wraplen <= 0)
    wraplen = 78;

  const size_t vlen = mutt_str_strlen(v);
  if (tag)
  {
    /* if header is short enough, simply print it */
    if (!display && (mutt_strwidth(tag) + 2 + pfxw + mutt_strnwidth(v, vlen) <= wraplen))
    {
      mutt_debug(LL_DEBUG5, "buf[%s%s: %s] is short enough\n", NONULL(pfx), tag, v);
      if (fprintf(fp, "%s%s: %s\n", NONULL(pfx), tag, v) <= 0)
        goto out;
      rc = 0;
      goto out;
    }
    else
    {
      rc = fold_one_header(fp, tag, v, vlen, pfx, wraplen, chflags);
      goto out;
    }
  }

  char *p = v;
  last = v;
  line = v;
  while (p && *p)
  {
    p = strchr(p, '\n');

    /* find maximum line width in current header */
    if (p)
      *p = '\0';
    w = mutt_mb_width(line, 0, display);
    if (w > max)
      max = w;
    if (p)
      *p = '\n';

    if (!p)
      break;

    line = ++p;
    if ((*p != ' ') && (*p != '\t'))
    {
      if (write_one_header(fp, pfxw, max, wraplen, pfx, last, p, chflags) < 0)
        goto out;
      last = p;
      max = 0;
    }
  }

  if (last && *last)
    if (write_one_header(fp, pfxw, max, wraplen, pfx, last, p, chflags) < 0)
      goto out;

  rc = 0;

out:
  FREE(&v);
  return rc;
}

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userhdrs_override_cmp()

static int userhdrs_override_cmp ( const void *  a, const void *  b  )

static

Compare a user-defined header with an element of the userhdrs_override_headers list.

Parameters

a	Pointer to the string containing the user-defined header
b	Pointer to an element of the userhdrs_override_headers list

Return values

-1	a precedes b
0	a and b are identical
1	b precedes a

Definition at line 2239 of file sendlib.c.

{
  const char *ca = a;
  const char *cb = *(const char **) b;
  return mutt_str_strncasecmp(ca, cb, strlen(cb));
}

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write_userhdrs()

static struct UserHdrsOverride write_userhdrs ( FILE *  fp, const struct ListHead *  userhdrs, bool  privacy  )

static

Write user-defined headers and keep track of the interesting ones.

Parameters

fp	FILE pointer where to write the headers
userhdrs	List of headers to write
privacy	Omit headers that could identify the user

Return values

obj	UserHdrsOverride struct containing a bitmask of which unique headers were written

Definition at line 2253 of file sendlib.c.

{
  struct UserHdrsOverride overrides = { { 0 } };

  struct ListNode *tmp = NULL;
  STAILQ_FOREACH(tmp, userhdrs, entries)
  {
    char *const colon = strchr(tmp->data, ':');
    if (!colon)
    {
      continue;
    }

    const char *const value = mutt_str_skip_email_wsp(colon + 1);
    if (*value == '\0')
    {
      continue; /* don't emit empty fields. */
    }

    /* check whether the current user-header is an override */
    size_t curr_override = (size_t) -1;
    const char *const *idx = bsearch(tmp->data, userhdrs_override_headers,
                                     mutt_array_size(userhdrs_override_headers),
                                     sizeof(char *), userhdrs_override_cmp);
    if (idx != NULL)
    {
      curr_override = idx - userhdrs_override_headers;
      overrides.is_overridden[curr_override] = true;
    }

    if (privacy && (curr_override == USERHDRS_OVERRIDE_USER_AGENT))
    {
      continue;
    }

    *colon = '\0';
    mutt_write_one_header(fp, tmp->data, value, NULL, 0, CH_NO_FLAGS);
    *colon = ':';
  }

  return overrides;
}

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mutt_rfc822_write_header()

int mutt_rfc822_write_header	(	FILE *	fp,
		struct Envelope *	env,
		struct Body *	attach,
		enum MuttWriteHeaderMode	mode,
		bool	privacy,
		bool	hide_protected_subject
	)

Write out one RFC822 header line.

Parameters

fp	File to write to
env	Envelope of email
attach	Attachment
mode	Mode, see MuttWriteHeaderMode
privacy	If true, remove headers that might identify the user
hide_protected_subject	If true, replace subject header

Return values

0	Success
-1	Failure

Note: all RFC2047 encoding should be done outside of this routine, except for the "real name." This will allow this routine to be used more than once, if necessary.

Likewise, all IDN processing should happen outside of this routine.

privacy true => will omit any headers which may identify the user. Output generated is suitable for being sent through anonymous remailer chains.

hide_protected_subject: replaces the Subject header with $crypt_protected_headers_subject in NORMAL or POSTPONE mode.

Definition at line 2320 of file sendlib.c.

{
  char buf[1024];

  if (((mode == MUTT_WRITE_HEADER_NORMAL) || (mode == MUTT_WRITE_HEADER_FCC)) && !privacy)
    fputs(mutt_date_make_date(buf, sizeof(buf)), fp);

  /* UseFrom is not consulted here so that we can still write a From:
   * field if the user sets it with the 'my_hdr' command */
  if (!TAILQ_EMPTY(&env->from) && !privacy)
  {
    buf[0] = '\0';
    mutt_addrlist_write(&env->from, buf, sizeof(buf), false);
    fprintf(fp, "From: %s\n", buf);
  }

  if (!TAILQ_EMPTY(&env->sender) && !privacy)
  {
    buf[0] = '\0';
    mutt_addrlist_write(&env->sender, buf, sizeof(buf), false);
    fprintf(fp, "Sender: %s\n", buf);
  }

  if (!TAILQ_EMPTY(&env->to))
  {
    fputs("To: ", fp);
    mutt_write_addrlist(&env->to, fp, 4, 0);
  }
  else if (mode == MUTT_WRITE_HEADER_EDITHDRS)
#ifdef USE_NNTP
    if (!OptNewsSend)
#endif
      fputs("To:\n", fp);

  if (!TAILQ_EMPTY(&env->cc))
  {
    fputs("Cc: ", fp);
    mutt_write_addrlist(&env->cc, fp, 4, 0);
  }
  else if (mode == MUTT_WRITE_HEADER_EDITHDRS)
#ifdef USE_NNTP
    if (!OptNewsSend)
#endif
      fputs("Cc:\n", fp);

  if (!TAILQ_EMPTY(&env->bcc))
  {
    if ((mode == MUTT_WRITE_HEADER_POSTPONE) ||
        (mode == MUTT_WRITE_HEADER_EDITHDRS) || (mode == MUTT_WRITE_HEADER_FCC) ||
        ((mode == MUTT_WRITE_HEADER_NORMAL) && C_WriteBcc))
    {
      fputs("Bcc: ", fp);
      mutt_write_addrlist(&env->bcc, fp, 5, 0);
    }
  }
  else if (mode == MUTT_WRITE_HEADER_EDITHDRS)
#ifdef USE_NNTP
    if (!OptNewsSend)
#endif
      fputs("Bcc:\n", fp);

#ifdef USE_NNTP
  if (env->newsgroups)
    fprintf(fp, "Newsgroups: %s\n", env->newsgroups);
  else if ((mode == MUTT_WRITE_HEADER_EDITHDRS) && OptNewsSend)
    fputs("Newsgroups:\n", fp);

  if (env->followup_to)
    fprintf(fp, "Followup-To: %s\n", env->followup_to);
  else if ((mode == MUTT_WRITE_HEADER_EDITHDRS) && OptNewsSend)
    fputs("Followup-To:\n", fp);

  if (env->x_comment_to)
    fprintf(fp, "X-Comment-To: %s\n", env->x_comment_to);
  else if ((mode == MUTT_WRITE_HEADER_EDITHDRS) && OptNewsSend && C_XCommentTo)
    fputs("X-Comment-To:\n", fp);
#endif

  if (env->subject)
  {
    if (hide_protected_subject &&
        ((mode == MUTT_WRITE_HEADER_NORMAL) || (mode == MUTT_WRITE_HEADER_FCC) ||
         (mode == MUTT_WRITE_HEADER_POSTPONE)))
      mutt_write_one_header(fp, "Subject", C_CryptProtectedHeadersSubject, NULL, 0, CH_NO_FLAGS);
    else
      mutt_write_one_header(fp, "Subject", env->subject, NULL, 0, CH_NO_FLAGS);
  }
  else if (mode == MUTT_WRITE_HEADER_EDITHDRS)
    fputs("Subject:\n", fp);

  /* save message id if the user has set it */
  if (env->message_id && !privacy)
    fprintf(fp, "Message-ID: %s\n", env->message_id);

  if (!TAILQ_EMPTY(&env->reply_to))
  {
    fputs("Reply-To: ", fp);
    mutt_write_addrlist(&env->reply_to, fp, 10, 0);
  }
  else if (mode == MUTT_WRITE_HEADER_EDITHDRS)
    fputs("Reply-To:\n", fp);

  if (!TAILQ_EMPTY(&env->mail_followup_to))
  {
#ifdef USE_NNTP
    if (!OptNewsSend)
#endif
    {
      fputs("Mail-Followup-To: ", fp);
      mutt_write_addrlist(&env->mail_followup_to, fp, 18, 0);
    }
  }

  /* Add any user defined headers */
  struct UserHdrsOverride userhdrs_overrides = write_userhdrs(fp, &env->userhdrs, privacy);

  if ((mode == MUTT_WRITE_HEADER_NORMAL) || (mode == MUTT_WRITE_HEADER_FCC) ||
      (mode == MUTT_WRITE_HEADER_POSTPONE))
  {
    if (!STAILQ_EMPTY(&env->references))
    {
      fputs("References:", fp);
      mutt_write_references(&env->references, fp, 10);
      fputc('\n', fp);
    }

    /* Add the MIME headers */
    if (!userhdrs_overrides.is_overridden[USERHDRS_OVERRIDE_CONTENT_TYPE])
    {
      fputs("MIME-Version: 1.0\n", fp);
      mutt_write_mime_header(attach, fp);
    }
  }

  if (!STAILQ_EMPTY(&env->in_reply_to))
  {
    fputs("In-Reply-To:", fp);
    mutt_write_references(&env->in_reply_to, fp, 0);
    fputc('\n', fp);
  }

#ifdef USE_AUTOCRYPT
  if (C_Autocrypt)
  {
    if (mode == MUTT_WRITE_HEADER_NORMAL || mode == MUTT_WRITE_HEADER_FCC)
      mutt_autocrypt_write_autocrypt_header(env, fp);
    if (mode == MUTT_WRITE_HEADER_MIME)
      mutt_autocrypt_write_gossip_headers(env, fp);
  }
#endif

  if (((mode == MUTT_WRITE_HEADER_NORMAL) || (mode == MUTT_WRITE_HEADER_FCC)) && !privacy &&
      C_UserAgent && !userhdrs_overrides.is_overridden[USERHDRS_OVERRIDE_USER_AGENT])
  {
    /* Add a vanity header */
    fprintf(fp, "User-Agent: NeoMutt/%s%s\n", PACKAGE_VERSION, GitVer);
  }

  return (ferror(fp) == 0) ? 0 : -1;
}

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encode_headers()

static void encode_headers ( struct ListHead *  h )

static

RFC2047-encode a list of headers.

Parameters

h	String List of headers

The strings are encoded in-place.

Definition at line 2489 of file sendlib.c.

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

  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_strdup(p);

    if (!tmp)
      continue;

    rfc2047_encode(&tmp, NULL, i + 2, C_SendCharset);
    mutt_mem_realloc(&np->data, i + 2 + mutt_str_strlen(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

)

Get the Fully-Qualified Domain Name.

Parameters

may_hide_host

If true, hide the hostname (leaving just the domain)

Return values

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

Warning

Do not free the returned pointer

Definition at line 2526 of file sendlib.c.

{
  if (!C_Hostname || (C_Hostname[0] == '@'))
    return NULL;

  char *p = C_Hostname;

  if (may_hide_host && C_HiddenHost)
  {
    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 ( void  )

static

Generate a unique Message ID.

Return values

ptr	Message ID

Note

The caller should free the string

Definition at line 2553 of file sendlib.c.

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

  mutt_rand_base32(rndid, sizeof(rndid) - 1);
  rndid[MUTT_RANDTAG_LEN] = 0;
  const char *fqdn = mutt_fqdn(false);
  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_strdup(buf);
}

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alarm_handler()

static void alarm_handler ( int  sig )

static

Async notification of an alarm signal.

Parameters

sig	Signal, (SIGALRM)

Definition at line 2574 of file sendlib.c.

{
  SigAlrm = 1;
}

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send_msg()

static int send_msg ( const char *  path, char **  args, const char *  msg, char **  tempfile  )

static

invoke sendmail in a subshell

Parameters

[in]	path	Path to program to execute
[in]	args	Arguments to pass to program
[in]	msg	Temp file containing message to send
[out]	tempfile	If sendmail is put in the background, this points to the temporary file containing the stdout of the child process. If it is NULL, stderr and stdout are not redirected.

Return values

0	Success
>0	Failure, return code from sendmail

Definition at line 2591 of file sendlib.c.

{
  sigset_t set;
  int st;

  mutt_sig_block_system();

  sigemptyset(&set);
  /* we also don't want to be stopped right now */
  sigaddset(&set, SIGTSTP);
  sigprocmask(SIG_BLOCK, &set, NULL);

  if ((C_SendmailWait >= 0) && tempfile)
  {
    struct Buffer *tmp = mutt_buffer_pool_get();
    mutt_buffer_mktemp(tmp);
    *tempfile = mutt_buffer_strdup(tmp);
    mutt_buffer_pool_release(&tmp);
  }

  pid_t pid = fork();
  if (pid == 0)
  {
    struct sigaction act, oldalrm;

    /* save parent's ID before setsid() */
    pid_t ppid = getppid();

    /* we want the delivery to continue even after the main process dies,
     * so we put ourselves into another session right away */
    setsid();

    /* next we close all open files */
    close(0);
#ifdef OPEN_MAX
    for (int fd = tempfile ? 1 : 3; fd < OPEN_MAX; fd++)
      close(fd);
#elif defined(_POSIX_OPEN_MAX)
    for (int fd = tempfile ? 1 : 3; fd < _POSIX_OPEN_MAX; fd++)
      close(fd);
#else
    if (tempfile)
    {
      close(1);
      close(2);
    }
#endif

    /* now the second fork() */
    pid = fork();
    if (pid == 0)
    {
      /* "msg" will be opened as stdin */
      if (open(msg, O_RDONLY, 0) < 0)
      {
        unlink(msg);
        _exit(S_ERR);
      }
      unlink(msg);

      if ((C_SendmailWait >= 0) && tempfile && *tempfile)
      {
        /* *tempfile will be opened as stdout */
        if (open(*tempfile, O_WRONLY | O_APPEND | O_CREAT | O_EXCL, 0600) < 0)
          _exit(S_ERR);
        /* redirect stderr to *tempfile too */
        if (dup(1) < 0)
          _exit(S_ERR);
      }
      else if (tempfile)
      {
        if (open("/dev/null", O_WRONLY | O_APPEND) < 0) /* stdout */
          _exit(S_ERR);
        if (open("/dev/null", O_RDWR | O_APPEND) < 0) /* stderr */
          _exit(S_ERR);
      }

      /* execvpe is a glibc extension */
      /* execvpe (path, args, mutt_envlist_getlist()); */
      execvp(path, args);
      _exit(S_ERR);
    }
    else if (pid == -1)
    {
      unlink(msg);
      FREE(tempfile);
      _exit(S_ERR);
    }

    /* C_SendmailWait > 0: interrupt waitpid() after C_SendmailWait seconds
     * C_SendmailWait = 0: wait forever
     * C_SendmailWait < 0: don't wait */
    if (C_SendmailWait > 0)
    {
      SigAlrm = 0;
      act.sa_handler = alarm_handler;
#ifdef SA_INTERRUPT
      /* need to make sure waitpid() is interrupted on SIGALRM */
      act.sa_flags = SA_INTERRUPT;
#else
      act.sa_flags = 0;
#endif
      sigemptyset(&act.sa_mask);
      sigaction(SIGALRM, &act, &oldalrm);
      alarm(C_SendmailWait);
    }
    else if (C_SendmailWait < 0)
      _exit(0xff & EX_OK);

    if (waitpid(pid, &st, 0) > 0)
    {
      st = WIFEXITED(st) ? WEXITSTATUS(st) : S_ERR;
      if (C_SendmailWait && (st == (0xff & EX_OK)) && tempfile && *tempfile)
      {
        unlink(*tempfile); /* no longer needed */
        FREE(tempfile);
      }
    }
    else
    {
      st = ((C_SendmailWait > 0) && (errno == EINTR) && SigAlrm) ? S_BKG : S_ERR;
      if ((C_SendmailWait > 0) && tempfile && *tempfile)
      {
        unlink(*tempfile);
        FREE(tempfile);
      }
    }

    if (C_SendmailWait > 0)
    {
      /* reset alarm; not really needed, but... */
      alarm(0);
      sigaction(SIGALRM, &oldalrm, NULL);
    }

    if ((kill(ppid, 0) == -1) && (errno == ESRCH) && tempfile && *tempfile)
    {
      /* the parent is already dead */
      unlink(*tempfile);
      FREE(tempfile);
    }

    _exit(st);
  }

  sigprocmask(SIG_UNBLOCK, &set, NULL);

  if ((pid != -1) && (waitpid(pid, &st, 0) > 0))
    st = WIFEXITED(st) ? WEXITSTATUS(st) : S_ERR; /* return child status */
  else
    st = S_ERR; /* error */

  mutt_sig_unblock_system(true);

  return st;
}

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add_args_one()

static char** add_args_one ( char **  args, size_t *  argslen, size_t *  argsmax, struct Address *  addr  )

static

Add an Address to a dynamic array.

Parameters

[out]	args	Array to add to
[out]	argslen	Number of entries in array
[out]	argsmax	Allocated size of the array
[in]	addr	Address to add

Return values

ptr	Updated array

Definition at line 2756 of file sendlib.c.

{
  /* weed out group mailboxes, since those are for display only */
  if (addr->mailbox && !addr->group)
  {
    if (*argslen == *argsmax)
      mutt_mem_realloc(&args, (*argsmax += 5) * sizeof(char *));
    args[(*argslen)++] = addr->mailbox;
  }
  return args;
}

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add_args()

static char** add_args ( char **  args, size_t *  argslen, size_t *  argsmax, struct AddressList *  al  )

static

Add a list of Addresses to a dynamic array.

Parameters

[out]	args	Array to add to
[out]	argslen	Number of entries in array
[out]	argsmax	Allocated size of the array
[in]	al	Addresses to add

Return values

ptr	Updated array

Definition at line 2776 of file sendlib.c.

{
  if (!al)
    return args;

  struct Address *a = NULL;
  TAILQ_FOREACH(a, al, entries)
  {
    args = add_args_one(args, argslen, argsmax, a);
  }
  return args;
}

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add_option()

static char** add_option ( char **  args, size_t *  argslen, size_t *  argsmax, char *  s  )

static

Add a string to a dynamic array.

Parameters

[out]	args	Array to add to
[out]	argslen	Number of entries in array
[out]	argsmax	Allocated size of the array
[in]	s	string to add

Return values

ptr	Updated array

Note

The array may be realloc()'d

Definition at line 2799 of file sendlib.c.

{
  if (*argslen == *argsmax)
    mutt_mem_realloc(&args, (*argsmax += 5) * sizeof(char *));
  args[(*argslen)++] = s;
  return args;
}

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mutt_invoke_sendmail()

int mutt_invoke_sendmail	(	struct AddressList *	from,
		struct AddressList *	to,
		struct AddressList *	cc,
		struct AddressList *	bcc,
		const char *	msg,
		int	eightbit
	)

Run sendmail.

Parameters

from	The sender
to	Recipients
cc	Recipients
bcc	Recipients
msg	File containing message
eightbit	Message contains 8bit chars

Return values

0	Success
-1	Failure

Definition at line 2818 of file sendlib.c.

{
  char *ps = NULL, *path = NULL, *s = NULL, *childout = NULL;
  char **args = NULL;
  size_t argslen = 0, argsmax = 0;
  char **extra_args = NULL;
  int i;

#ifdef USE_NNTP
  if (OptNewsSend)
  {
    char cmd[1024];

    mutt_expando_format(cmd, sizeof(cmd), 0, sizeof(cmd), NONULL(C_Inews),
                        nntp_format_str, 0, MUTT_FORMAT_NO_FLAGS);
    if (!*cmd)
    {
      i = nntp_post(Context->mailbox, msg);
      unlink(msg);
      return i;
    }

    s = mutt_str_strdup(cmd);
  }
  else
#endif
    s = mutt_str_strdup(C_Sendmail);

  /* ensure that $sendmail is set to avoid a crash. http://dev.mutt.org/trac/ticket/3548 */
  if (!s)
  {
    mutt_error(_("$sendmail must be set in order to send mail"));
    return -1;
  }

  ps = s;
  i = 0;
  while ((ps = strtok(ps, " ")))
  {
    if (argslen == argsmax)
      mutt_mem_realloc(&args, sizeof(char *) * (argsmax += 5));

    if (i)
    {
      if (mutt_str_strcmp(ps, "--") == 0)
        break;
      args[argslen++] = ps;
    }
    else
    {
      path = mutt_str_strdup(ps);
      ps = strrchr(ps, '/');
      if (ps)
        ps++;
      else
        ps = path;
      args[argslen++] = ps;
    }
    ps = NULL;
    i++;
  }

#ifdef USE_NNTP
  if (!OptNewsSend)
  {
#endif
    size_t extra_argslen = 0;
    /* If C_Sendmail contained a "--", we save the recipients to append to
   * args after other possible options added below. */
    if (ps)
    {
      ps = NULL;
      size_t extra_argsmax = 0;
      while ((ps = strtok(ps, " ")))
      {
        if (extra_argslen == extra_argsmax)
          mutt_mem_realloc(&extra_args, sizeof(char *) * (extra_argsmax += 5));

        extra_args[extra_argslen++] = ps;
        ps = NULL;
      }
    }

    if (eightbit && C_Use8bitmime)
      args = add_option(args, &argslen, &argsmax, "-B8BITMIME");

    if (C_UseEnvelopeFrom)
    {
      if (C_EnvelopeFromAddress)
      {
        args = add_option(args, &argslen, &argsmax, "-f");
        args = add_args_one(args, &argslen, &argsmax, C_EnvelopeFromAddress);
      }
      else if (!TAILQ_EMPTY(from) && !TAILQ_NEXT(TAILQ_FIRST(from), entries))
      {
        args = add_option(args, &argslen, &argsmax, "-f");
        args = add_args(args, &argslen, &argsmax, from);
      }
    }

    if (C_DsnNotify)
    {
      args = add_option(args, &argslen, &argsmax, "-N");
      args = add_option(args, &argslen, &argsmax, C_DsnNotify);
    }
    if (C_DsnReturn)
    {
      args = add_option(args, &argslen, &argsmax, "-R");
      args = add_option(args, &argslen, &argsmax, C_DsnReturn);
    }
    args = add_option(args, &argslen, &argsmax, "--");
    for (i = 0; i < extra_argslen; i++)
      args = add_option(args, &argslen, &argsmax, extra_args[i]);
    args = add_args(args, &argslen, &argsmax, to);
    args = add_args(args, &argslen, &argsmax, cc);
    args = add_args(args, &argslen, &argsmax, bcc);
#ifdef USE_NNTP
  }
#endif

  if (argslen == argsmax)
    mutt_mem_realloc(&args, sizeof(char *) * (++argsmax));

  args[argslen++] = NULL;

  /* Some user's $sendmail command uses gpg for password decryption,
   * and is set up to prompt using ncurses pinentry.  If we
   * mutt_endwin() it leaves other users staring at a blank screen.
   * So instead, just force a hard redraw on the next refresh. */
  if (!OptNoCurses)
    mutt_need_hard_redraw();

  i = send_msg(path, args, msg, OptNoCurses ? NULL : &childout);
  if (i != (EX_OK & 0xff))
  {
    if (i != S_BKG)
    {
      const char *e = mutt_str_sysexit(i);
      mutt_error(_("Error sending message, child exited %d (%s)"), i, NONULL(e));
      if (childout)
      {
        struct stat st;

        if ((stat(childout, &st) == 0) && (st.st_size > 0))
        {
          mutt_do_pager(_("Output of the delivery process"), childout,
                        MUTT_PAGER_NO_FLAGS, NULL);
        }
      }
    }
  }
  else if (childout)
    unlink(childout);

  FREE(&childout);
  FREE(&path);
  FREE(&s);
  FREE(&args);
  FREE(&extra_args);

  if (i == (EX_OK & 0xff))
    i = 0;
  else if (i == S_BKG)
    i = 1;
  else
    i = -1;
  return i;
}

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mutt_prepare_envelope()

void mutt_prepare_envelope	(	struct Envelope *	env,
		bool	final
	)

Prepare an email header.

Parameters

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

Encode all the headers prior to sending the email.

For postponing (!final) do the necessary encodings only

Definition at line 2998 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_strdup(buf);
    }

    mutt_set_followup_to(env);

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

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

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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 3037 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  )

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

Return values

0	Success
-1	Failure

Definition at line 3061 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)
  {
    char date[128];
    CopyHeaderFlags chflags = CH_XMIT | CH_NONEWLINE | CH_NOQFROM;

    if (!C_BounceDelivered)
      chflags |= CH_WEED_DELIVERED;

    fseeko(fp, e->offset, SEEK_SET);
    fprintf(fp_tmp, "Resent-From: %s", resent_from);
    fprintf(fp_tmp, "\nResent-%s", mutt_date_make_date(date, sizeof(date)));
    char *msgid_str = gen_msgid();
    fprintf(fp_tmp, "Resent-Message-ID: %s\n", msgid_str);
    FREE(&msgid_str);
    fputs("Resent-To: ", fp_tmp);
    mutt_write_addrlist(to, fp_tmp, 11, 0);
    mutt_copy_header(fp, e, fp_tmp, chflags, NULL, 0);
    fputc('\n', fp_tmp);
    mutt_file_copy_bytes(fp, fp_tmp, e->content->length);
    if (mutt_file_fclose(&fp_tmp) != 0)
    {
      mutt_perror(mutt_b2s(tempfile));
      unlink(mutt_b2s(tempfile));
      return -1;
    }
#ifdef USE_SMTP
    if (C_SmtpUrl)
    {
      rc = mutt_smtp_send(env_from, to, NULL, NULL, mutt_b2s(tempfile),
                          e->content->encoding == ENC_8BIT);
    }
    else
#endif
    {
      rc = mutt_invoke_sendmail(env_from, to, NULL, NULL, mutt_b2s(tempfile),
                                e->content->encoding == ENC_8BIT);
    }
  }

  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
	)

Bounce an email message.

Parameters

fp	Handle of message
e	Email
to	AddressList to bounce to

Return values

0	Success
-1	Failure

Definition at line 3123 of file sendlib.c.

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

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

  resent_from[0] = '\0';
  struct Address *from = mutt_default_from();
  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)
    from->personal = mutt_str_strdup(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);
  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 3179 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
	)

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

Return values

0	Success
-1	Failure

Definition at line 3206 of file sendlib.c.

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

  mutt_str_strfcpy(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);
  if (status != 0)
    return status;

  while ((tok = strtok(NULL, ",")))
  {
    if (!*tok)
      continue;

    /* Only call mutt_expand_path if tok has some data */
    mutt_debug(LL_DEBUG1, "Fcc: additional mailbox token = '%s'\n", tok);
    mutt_str_strfcpy(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);
    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
	)

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

Return values

0	Success
-1	Failure

Definition at line 3253 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;
  char buf[128];
  MsgOpenFlags onm_flags;

  if (post)
    set_noconv_flags(e->content, 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;
  }

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

  /* (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");

  /* mutt_rfc822_write_header() only writes out a Date: header with
   * mode == 0, i.e. _not_ postponement; so write out one ourself */
  if (post)
    fprintf(msg->fp, "%s", mutt_date_make_date(buf, sizeof(buf)));

  /* (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);
      if (C_PgpSignAs)
        fprintf(msg->fp, "<%s>", C_PgpSignAs);
    }
    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);
      if (C_SmimeEncryptWith)
        fprintf(msg->fp, "C<%s>", C_SmimeEncryptWith);
    }
    if (e->security & SEC_OPPENCRYPT)
      fputc('O', msg->fp);
    if (e->security & SEC_SIGN)
    {
      fputc('S', msg->fp);
      if (C_SmimeSignAs)
        fprintf(msg->fp, "<%s>", C_SmimeSignAs);
    }
    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->content, fp_tmp);

    /* 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->content, msg->fp);
  }

  if (mx_msg_commit(ctx_fcc->mailbox, msg) != 0)
    rc = -1;
  else if (finalpath)
    *finalpath = mutt_str_strdup(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->content, 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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Variable Documentation

C_Allow8bit

bool C_Allow8bit

Config: Allow 8-bit messages, don't use quoted-printable or base64.

Definition at line 80 of file sendlib.c.

C_AttachCharset

char* C_AttachCharset

Config: When attaching files, use one of these character sets.

Definition at line 81 of file sendlib.c.

C_BounceDelivered

bool C_BounceDelivered

Config: Add 'Delivered-To' to bounced messages.

Definition at line 82 of file sendlib.c.

C_EncodeFrom

bool C_EncodeFrom

Config: Encode 'From ' as 'quote-printable' at the beginning of lines.

Definition at line 83 of file sendlib.c.

C_ForwardDecrypt

bool C_ForwardDecrypt

Config: Decrypt the message when forwarding it.

Definition at line 84 of file sendlib.c.

C_HiddenHost

bool C_HiddenHost

Config: Don't use the hostname, just the domain, when generating the message id.

Definition at line 85 of file sendlib.c.

C_Inews

char* C_Inews

Config: (nntp) External command to post news articles.

Definition at line 86 of file sendlib.c.

C_MimeForwardDecode

bool C_MimeForwardDecode

Config: Decode the forwarded message before attaching it.

Definition at line 87 of file sendlib.c.

C_MimeSubject

bool C_MimeSubject

Config: (nntp) Encode the article subject in base64.

encode subject line with RFC2047

Definition at line 88 of file sendlib.c.

C_MimeTypeQueryCommand

char* C_MimeTypeQueryCommand

Config: External command to determine the MIME type of an attachment.

Definition at line 89 of file sendlib.c.

C_MimeTypeQueryFirst

bool C_MimeTypeQueryFirst

Config: Run the C_MimeTypeQueryCommand before the mime.types lookup.

Definition at line 90 of file sendlib.c.

C_Sendmail

char* C_Sendmail

Config: External command to send email.

Definition at line 91 of file sendlib.c.

C_SendmailWait

short C_SendmailWait

Config: Time to wait for sendmail to finish.

Definition at line 92 of file sendlib.c.

C_Use8bitmime

bool C_Use8bitmime

Config: Use 8-bit messages and ESMTP to send messages.

Definition at line 93 of file sendlib.c.

C_UseEnvelopeFrom

bool C_UseEnvelopeFrom

Config: Set the envelope sender of the message.

Definition at line 94 of file sendlib.c.

C_UserAgent

bool C_UserAgent

Config: Add a 'User-Agent' head to outgoing mail.

Definition at line 95 of file sendlib.c.

C_WrapHeaders

short C_WrapHeaders

Config: Width to wrap headers in outgoing messages.

Definition at line 96 of file sendlib.c.

userhdrs_override_headers

const char* const userhdrs_override_headers[]

static

Initial value:

= {
  "content-type:",
  "user-agent:",
}

The next array/enum pair is used to to keep track of user headers that override pre-defined headers NeoMutt would emit.

Keep the array sorted and in sync with the enum.

Definition at line 127 of file sendlib.c.