3 * Miscellaneous functions for sending an email
6 * Copyright (C) 1996-2002,2009-2012 Michael R. Elkins <me@mutt.org>
7 * Copyright (C) 2019 Pietro Cerutti <gahr@gahr.ch>
10 * This program is free software: you can redistribute it and/or modify it under
11 * the terms of the GNU General Public License as published by the Free Software
12 * Foundation, either version 2 of the License, or (at your option) any later
15 * This program is distributed in the hope that it will be useful, but WITHOUT
16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
20 * You should have received a copy of the GNU General Public License along with
21 * this program. If not, see <http://www.gnu.org/licenses/>.
25 * @page sendlib Miscellaneous functions for sending an email
27 * Miscellaneous functions for sending an email
45 #include "mutt/mutt.h"
46 #include "address/lib.h"
47 #include "config/lib.h"
48 #include "email/lib.h"
59 #include "mutt_parse.h"
60 #include "mutt_window.h"
63 #include "ncrypt/ncrypt.h"
69 #include "nntp/nntp.h"
71 #ifdef HAVE_SYSEXITS_H
77 /* These Config Variables are only used in sendlib.c */
78 bool C_Allow8bit; ///< Config: Allow 8-bit messages, don't use quoted-printable or base64
79 char *C_AttachCharset; ///< Config: When attaching files, use one of these character sets
80 bool C_BounceDelivered; ///< Config: Add 'Delivered-To' to bounced messages
81 bool C_EncodeFrom; ///< Config: Encode 'From ' as 'quote-printable' at the beginning of lines
82 bool C_ForwardDecrypt; ///< Config: Decrypt the message when forwarding it
83 bool C_HiddenHost; ///< Config: Don't use the hostname, just the domain, when generating the message id
84 char *C_Inews; ///< Config: (nntp) External command to post news articles
85 bool C_MimeForwardDecode; ///< Config: Decode the forwarded message before attaching it
86 bool C_MimeSubject; ///< Config: (nntp) Encode the article subject in base64
87 char *C_MimeTypeQueryCommand; ///< Config: External command to determine the MIME type of an attachment
88 bool C_MimeTypeQueryFirst; ///< Config: Run the #C_MimeTypeQueryCommand before the mime.types lookup
89 char *C_Sendmail; ///< Config: External command to send email
90 short C_SendmailWait; ///< Config: Time to wait for sendmail to finish
91 bool C_Use8bitmime; ///< Config: Use 8-bit messages and ESMTP to send messages
92 bool C_UseEnvelopeFrom; ///< Config: Set the envelope sender of the message
93 bool C_UserAgent; ///< Config: Add a 'User-Agent' head to outgoing mail
94 short C_WrapHeaders; ///< Config: Width to wrap headers in outgoing messages
97 * encode_quoted - Encode text as quoted printable
98 * @param fc Cursor for converting a file's encoding
99 * @param fp_out File to store the result
100 * @param istext Is the input text?
102 static void encode_quoted(struct FgetConv *fc, FILE *fp_out, bool istext)
105 char line[77], savechar;
107 while ((c = mutt_ch_fgetconv(fc)) != EOF)
109 /* Wrap the line if needed. */
110 if ((linelen == 76) && ((istext && (c != '\n')) || !istext))
112 /* If the last character is "quoted", then be sure to move all three
113 * characters to the next line. Otherwise, just move the last
115 if (line[linelen - 3] == '=')
117 line[linelen - 3] = 0;
119 fputs("=\n", fp_out);
122 line[1] = line[linelen - 2];
123 line[2] = line[linelen - 1];
128 savechar = line[linelen - 1];
129 line[linelen - 1] = '=';
138 /* Escape lines that begin with/only contain "the message separator". */
139 if ((linelen == 4) && mutt_str_startswith(line, "From", CASE_MATCH))
141 mutt_str_strfcpy(line, "=46rom", sizeof(line));
144 else if ((linelen == 4) && mutt_str_startswith(line, "from", CASE_MATCH))
146 mutt_str_strfcpy(line, "=66rom", sizeof(line));
149 else if ((linelen == 1) && (line[0] == '.'))
151 mutt_str_strfcpy(line, "=2E", sizeof(line));
155 if ((c == '\n') && istext)
157 /* Check to make sure there is no trailing space on this line. */
158 if ((linelen > 0) && ((line[linelen - 1] == ' ') || (line[linelen - 1] == '\t')))
162 sprintf(line + linelen - 1, "=%2.2X", (unsigned char) line[linelen - 1]);
167 int savechar2 = line[linelen - 1];
169 line[linelen - 1] = '=';
172 fprintf(fp_out, "\n=%2.2X", (unsigned char) savechar2);
183 else if ((c != 9) && ((c < 32) || (c > 126) || (c == '=')))
185 /* Check to make sure there is enough room for the quoted character.
186 * If not, wrap to the next line. */
189 line[linelen++] = '=';
195 sprintf(line + linelen, "=%2.2X", (unsigned char) c);
200 /* Don't worry about wrapping the line here. That will happen during
201 * the next iteration when I'll also know what the next character is. */
206 /* Take care of anything left in the buffer */
209 if ((line[linelen - 1] == ' ') || (line[linelen - 1] == '\t'))
211 /* take care of trailing whitespace */
213 sprintf(line + linelen - 1, "=%2.2X", (unsigned char) line[linelen - 1]);
216 savechar = line[linelen - 1];
217 line[linelen - 1] = '=';
221 sprintf(line, "=%2.2X", (unsigned char) savechar);
231 * struct B64Context - Cursor for the Base64 conversion
241 * b64_init - Set up the base64 conversion
242 * @param bctx Cursor for the base64 conversion
245 static int b64_init(struct B64Context *bctx)
247 memset(bctx->buffer, '\0', sizeof(bctx->buffer));
255 * b64_flush - Save the bytes to the file
256 * @param bctx Cursor for the base64 conversion
257 * @param fp_out File to save the output
259 static void b64_flush(struct B64Context *bctx, FILE *fp_out)
261 /* for some reasons, mutt_b64_encode expects the
262 * output buffer to be larger than 10B */
269 if (bctx->linelen >= 72)
275 /* ret should always be equal to 4 here, because bctx->size
276 * is a value between 1 and 3 (included), but let's not hardcode it
277 * and prefer the return value of the function */
278 ret = mutt_b64_encode(bctx->buffer, bctx->size, encoded, sizeof(encoded));
279 for (size_t i = 0; i < ret; i++)
281 fputc(encoded[i], fp_out);
289 * b64_putc - Base64-encode one character
290 * @param bctx Cursor for the base64 conversion
291 * @param c Character to encode
292 * @param fp_out File to save the output
294 static void b64_putc(struct B64Context *bctx, char c, FILE *fp_out)
297 b64_flush(bctx, fp_out);
299 bctx->buffer[bctx->size++] = c;
303 * encode_base64 - Base64-encode some data
304 * @param fc Cursor for converting a file's encoding
305 * @param fp_out File to store the result
306 * @param istext Is the input text?
308 static void encode_base64(struct FgetConv *fc, FILE *fp_out, int istext)
310 struct B64Context bctx;
315 while ((ch = mutt_ch_fgetconv(fc)) != EOF)
322 if (istext && (ch == '\n') && (ch1 != '\r'))
323 b64_putc(&bctx, '\r', fp_out);
324 b64_putc(&bctx, ch, fp_out);
327 b64_flush(&bctx, fp_out);
332 * encode_8bit - Write the data as raw 8-bit data
333 * @param fc Cursor for converting a file's encoding
334 * @param fp_out File to store the result
336 static void encode_8bit(struct FgetConv *fc, FILE *fp_out)
340 while ((ch = mutt_ch_fgetconv(fc)) != EOF)
352 * mutt_write_mime_header - Create a MIME header
354 * @param fp File to write to
358 int mutt_write_mime_header(struct Body *a, FILE *fp)
362 char buf[256] = { 0 };
364 fprintf(fp, "Content-Type: %s/%s", TYPE(a), a->subtype);
366 if (!TAILQ_EMPTY(&a->parameter))
368 len = 25 + mutt_str_strlen(a->subtype); /* approximate len. of content-type */
370 struct Parameter *np = NULL;
371 TAILQ_FOREACH(np, &a->parameter, entries)
373 if (!np->attribute || !np->value)
376 struct ParameterList param_conts = rfc2231_encode_string(np->attribute, np->value);
377 struct Parameter *cont = NULL;
378 TAILQ_FOREACH(cont, ¶m_conts, entries)
383 mutt_addr_cat(buf, sizeof(buf), cont->value, MimeSpecials);
385 /* Dirty hack to make messages readable by Outlook Express
386 * for the Mac: force quotes around the boundary parameter
387 * even when they aren't needed.
389 if (!mutt_str_strcasecmp(cont->attribute, "boundary") &&
390 !mutt_str_strcmp(buf, cont->value))
391 snprintf(buf, sizeof(buf), "\"%s\"", cont->value);
393 tmplen = mutt_str_strlen(buf) + mutt_str_strlen(cont->attribute) + 1;
394 if (len + tmplen + 2 > 76)
405 fprintf(fp, "%s=%s", cont->attribute, buf);
408 mutt_param_free(¶m_conts);
415 fprintf(fp, "Content-Language: %s\n", a->language);
418 fprintf(fp, "Content-Description: %s\n", a->description);
420 if (a->disposition != DISP_NONE)
422 const char *dispstr[] = { "inline", "attachment", "form-data" };
424 if (a->disposition < sizeof(dispstr) / sizeof(char *))
426 fprintf(fp, "Content-Disposition: %s", dispstr[a->disposition]);
427 len = 21 + mutt_str_strlen(dispstr[a->disposition]);
429 if (a->use_disp && (a->disposition != DISP_INLINE))
431 char *fn = a->d_filename;
437 /* Strip off the leading path... */
438 char *t = strrchr(fn, '/');
444 struct ParameterList param_conts = rfc2231_encode_string("filename", t);
445 struct Parameter *cont = NULL;
446 TAILQ_FOREACH(cont, ¶m_conts, entries)
450 mutt_addr_cat(buf, sizeof(buf), cont->value, MimeSpecials);
452 tmplen = mutt_str_strlen(buf) + mutt_str_strlen(cont->attribute) + 1;
453 if (len + tmplen + 2 > 76)
464 fprintf(fp, "%s=%s", cont->attribute, buf);
467 mutt_param_free(¶m_conts);
475 mutt_debug(LL_DEBUG1, "ERROR: invalid content-disposition %d\n", a->disposition);
479 if (a->encoding != ENC_7BIT)
480 fprintf(fp, "Content-Transfer-Encoding: %s\n", ENCODING(a->encoding));
482 if (C_CryptProtectedHeadersWrite && a->mime_headers)
483 mutt_rfc822_write_header(fp, a->mime_headers, NULL, MUTT_WRITE_HEADER_MIME, false, false);
485 /* Do NOT add the terminator here!!! */
486 return ferror(fp) ? -1 : 0;
490 * write_as_text_part - Should the Body be written as a text MIME part
491 * @param b Email to examine
492 * @retval true If the Body should be written as text
494 static bool write_as_text_part(struct Body *b)
496 return mutt_is_text_part(b) ||
497 (((WithCrypto & APPLICATION_PGP) != 0) && mutt_is_application_pgp(b));
501 * mutt_write_mime_body - Write a MIME part
502 * @param a Body to use
503 * @param fp File to write to
507 int mutt_write_mime_body(struct Body *a, FILE *fp)
510 struct FgetConv *fc = NULL;
512 if (a->type == TYPE_MULTIPART)
514 /* First, find the boundary to use */
515 const char *p = mutt_param_get(&a->parameter, "boundary");
518 mutt_debug(LL_DEBUG1, "no boundary parameter found\n");
519 mutt_error(_("No boundary parameter found [report this error]"));
523 mutt_str_strfcpy(boundary, p, sizeof(boundary));
525 for (struct Body *t = a->parts; t; t = t->next)
527 fprintf(fp, "\n--%s\n", boundary);
528 if (mutt_write_mime_header(t, fp) == -1)
531 if (mutt_write_mime_body(t, fp) == -1)
534 fprintf(fp, "\n--%s--\n", boundary);
535 return ferror(fp) ? -1 : 0;
538 /* This is pretty gross, but it's the best solution for now... */
539 if (((WithCrypto & APPLICATION_PGP) != 0) && (a->type == TYPE_APPLICATION) &&
540 (mutt_str_strcmp(a->subtype, "pgp-encrypted") == 0))
542 fputs("Version: 1\n", fp);
546 fp_in = fopen(a->filename, "r");
549 mutt_debug(LL_DEBUG1, "%s no longer exists\n", a->filename);
550 mutt_error(_("%s no longer exists"), a->filename);
554 if ((a->type == TYPE_TEXT) && (!a->noconv))
556 char send_charset[128];
557 fc = mutt_ch_fgetconv_open(
559 mutt_body_get_charset(a, send_charset, sizeof(send_charset)), 0);
562 fc = mutt_ch_fgetconv_open(fp_in, 0, 0, 0);
564 mutt_sig_allow_interrupt(1);
565 if (a->encoding == ENC_QUOTED_PRINTABLE)
566 encode_quoted(fc, fp, write_as_text_part(a));
567 else if (a->encoding == ENC_BASE64)
568 encode_base64(fc, fp, write_as_text_part(a));
569 else if ((a->type == TYPE_TEXT) && (!a->noconv))
572 mutt_file_copy_stream(fp_in, fp);
573 mutt_sig_allow_interrupt(0);
575 mutt_ch_fgetconv_close(&fc);
576 mutt_file_fclose(&fp_in);
583 return ferror(fp) ? -1 : 0;
587 * mutt_generate_boundary - Create a unique boundary id for a MIME part
588 * @param parm MIME part
590 void mutt_generate_boundary(struct ParameterList *parm)
592 char rs[MUTT_RANDTAG_LEN + 1];
594 mutt_rand_base32(rs, sizeof(rs) - 1);
595 rs[MUTT_RANDTAG_LEN] = 0;
596 mutt_param_set(parm, "boundary", rs);
600 * struct ContentState - Info about the body of an email
612 * update_content_info - Cache some info about an email
613 * @param info Info about an Attachment
614 * @param s Info about the Body of an email
615 * @param buf Buffer for the result
616 * @param buflen Length of the buffer
618 static void update_content_info(struct Content *info, struct ContentState *s,
619 char *buf, size_t buflen)
622 int whitespace = s->whitespace;
624 int linelen = s->linelen;
625 bool was_cr = s->was_cr;
627 if (!buf) /* This signals EOF */
631 if (linelen > info->linemax)
632 info->linemax = linelen;
637 for (; buflen; buf++, buflen--)
654 if (linelen > info->linemax)
655 info->linemax = linelen;
671 if (linelen > info->linemax)
672 info->linemax = linelen;
686 else if ((ch == '\t') || (ch == '\f'))
696 else if ((ch < 32) || (ch == 127))
702 if ((ch == 'F') || (ch == 'f'))
713 if ((linelen == 2) && (ch != 'r'))
715 else if ((linelen == 3) && (ch != 'o'))
717 else if (linelen == 4)
731 if ((ch != ' ') && (ch != '\t'))
736 s->whitespace = whitespace;
738 s->linelen = linelen;
743 * convert_file_to - Change the encoding of a file
744 * @param[in] fp File to convert
745 * @param[in] fromcode Original encoding
746 * @param[in] ncodes Number of target encodings
747 * @param[in] tocodes List of target encodings
748 * @param[out] tocode Chosen encoding
749 * @param[in] info Encoding information
750 * @retval -1 Error, no conversion was possible
751 * @retval >0 Success, number of bytes converted
753 * Find the best charset conversion of the file from fromcode into one
754 * of the tocodes. If successful, set *tocode and Content *info and
755 * return the number of characters converted inexactly.
757 * We convert via UTF-8 in order to avoid the condition -1(EINVAL),
758 * which would otherwise prevent us from knowing the number of inexact
759 * conversions. Where the candidate target charset is UTF-8 we avoid
760 * doing the second conversion because iconv_open("UTF-8", "UTF-8")
761 * fails with some libraries.
763 * We assume that the output from iconv is never more than 4 times as
764 * long as the input for any pair of charsets we might be interested
767 static size_t convert_file_to(FILE *fp, const char *fromcode, int ncodes,
768 const char **tocodes, int *tocode, struct Content *info)
770 char bufi[256], bufu[512], bufo[4 * sizeof(bufi)];
773 const iconv_t cd1 = mutt_ch_iconv_open("utf-8", fromcode, 0);
774 if (cd1 == (iconv_t)(-1))
777 iconv_t *cd = mutt_mem_calloc(ncodes, sizeof(iconv_t));
778 size_t *score = mutt_mem_calloc(ncodes, sizeof(size_t));
779 struct ContentState *states = mutt_mem_calloc(ncodes, sizeof(struct ContentState));
780 struct Content *infos = mutt_mem_calloc(ncodes, sizeof(struct Content));
782 for (int i = 0; i < ncodes; i++)
784 if (mutt_str_strcasecmp(tocodes[i], "utf-8") != 0)
785 cd[i] = mutt_ch_iconv_open(tocodes[i], "utf-8", 0);
788 /* Special case for conversion to UTF-8 */
789 cd[i] = (iconv_t)(-1);
790 score[i] = (size_t)(-1);
798 /* Try to fill input buffer */
799 size_t n = fread(bufi + ibl, 1, sizeof(bufi) - ibl, fp);
802 /* Convert to UTF-8 */
803 const char *ib = bufi;
805 size_t obl = sizeof(bufu);
806 n = iconv(cd1, (ICONV_CONST char **) ((ibl != 0) ? &ib : 0), &ibl, &ob, &obl);
807 /* assert(n == (size_t)(-1) || !n); */
808 if ((n == (size_t)(-1)) && (((errno != EINVAL) && (errno != E2BIG)) || (ib == bufi)))
810 /* assert(errno == EILSEQ || (errno == EINVAL && ib == bufi && ibl < sizeof(bufi))); */
814 const size_t ubl1 = ob - bufu;
816 /* Convert from UTF-8 */
817 for (int i = 0; i < ncodes; i++)
819 if ((cd[i] != (iconv_t)(-1)) && (score[i] != (size_t)(-1)))
821 const char *ub = bufu;
825 n = iconv(cd[i], (ICONV_CONST char **) ((ibl || ubl) ? &ub : 0), &ubl, &ob, &obl);
826 if (n == (size_t)(-1))
828 /* assert(errno == E2BIG || (BUGGY_ICONV && (errno == EILSEQ || errno == ENOENT))); */
829 score[i] = (size_t)(-1);
834 update_content_info(&infos[i], &states[i], bufo, ob - bufo);
837 else if ((cd[i] == (iconv_t)(-1)) && (score[i] == (size_t)(-1)))
839 /* Special case for conversion to UTF-8 */
840 update_content_info(&infos[i], &states[i], bufu, ubl1);
846 /* Save unused input */
847 memmove(bufi, ib, ibl);
849 else if (!ubl1 && (ib < bufi + sizeof(bufi)))
858 /* Find best score */
860 for (int i = 0; i < ncodes; i++)
862 if ((cd[i] == (iconv_t)(-1)) && (score[i] == (size_t)(-1)))
864 /* Special case for conversion to UTF-8 */
869 else if ((cd[i] == (iconv_t)(-1)) || (score[i] == (size_t)(-1)))
871 else if ((ret == (size_t)(-1)) || (score[i] < ret))
879 if (ret != (size_t)(-1))
881 memcpy(info, &infos[*tocode], sizeof(struct Content));
882 update_content_info(info, &states[*tocode], 0, 0); /* EOF */
886 for (int i = 0; i < ncodes; i++)
887 if (cd[i] != (iconv_t)(-1))
900 * convert_file_from_to - Convert a file between encodings
901 * @param[in] fp File to read from
902 * @param[in] fromcodes Charsets to try converting FROM
903 * @param[in] tocodes Charsets to try converting TO
904 * @param[out] fromcode From charset selected
905 * @param[out] tocode To charset selected
906 * @param[out] info Info about the file
907 * @retval num Characters converted
908 * @retval -1 Error (as a size_t)
910 * Find the first of the fromcodes that gives a valid conversion and the best
911 * charset conversion of the file into one of the tocodes. If successful, set
912 * *fromcode and *tocode to dynamically allocated strings, set Content *info,
913 * and return the number of characters converted inexactly. If no conversion
914 * was possible, return -1.
916 * Both fromcodes and tocodes may be colon-separated lists of charsets.
917 * However, if fromcode is zero then fromcodes is assumed to be the name of a
918 * single charset even if it contains a colon.
920 static size_t convert_file_from_to(FILE *fp, const char *fromcodes, const char *tocodes,
921 char **fromcode, char **tocode, struct Content *info)
925 const char *c = NULL, *c1 = NULL;
929 /* Count the tocodes */
931 for (c = tocodes; c; c = c1 ? c1 + 1 : 0)
940 tcode = mutt_mem_malloc(ncodes * sizeof(char *));
941 for (c = tocodes, i = 0; c; c = c1 ? c1 + 1 : 0, i++)
946 tcode[i] = mutt_str_substr_dup(c, c1);
952 /* Try each fromcode in turn */
953 for (c = fromcodes; c; c = c1 ? c1 + 1 : 0)
958 fcode = mutt_str_substr_dup(c, c1);
960 ret = convert_file_to(fp, fcode, ncodes, (const char **) tcode, &cn, info);
961 if (ret != (size_t)(-1))
973 /* There is only one fromcode */
974 ret = convert_file_to(fp, fromcodes, ncodes, (const char **) tcode, &cn, info);
975 if (ret != (size_t)(-1))
983 for (i = 0; i < ncodes; i++)
992 * mutt_get_content_info - Analyze file to determine MIME encoding to use
993 * @param fname File to examine
994 * @param b Body to update
995 * @retval ptr Newly allocated Content
997 * Also set the body charset, sometimes, or not.
999 struct Content *mutt_get_content_info(const char *fname, struct Body *b)
1001 struct Content *info = NULL;
1002 struct ContentState state = { 0 };
1004 char *fromcode = NULL;
1005 char *tocode = NULL;
1012 fname = b->filename;
1014 if (stat(fname, &sb) == -1)
1016 mutt_error(_("Can't stat %s: %s"), fname, strerror(errno));
1020 if (!S_ISREG(sb.st_mode))
1022 mutt_error(_("%s isn't a regular file"), fname);
1026 fp = fopen(fname, "r");
1029 mutt_debug(LL_DEBUG1, "%s: %s (errno %d)\n", fname, strerror(errno), errno);
1033 info = mutt_mem_calloc(1, sizeof(struct Content));
1035 if (b && (b->type == TYPE_TEXT) && (!b->noconv && !b->force_charset))
1037 char *chs = mutt_param_get(&b->parameter, "charset");
1038 char *fchs = b->use_disp ? (C_AttachCharset ? C_AttachCharset : C_Charset) : C_Charset;
1039 if (C_Charset && (chs || C_SendCharset) &&
1040 (convert_file_from_to(fp, fchs, chs ? chs : C_SendCharset, &fromcode,
1041 &tocode, info) != (size_t)(-1)))
1046 mutt_ch_canonical_charset(chsbuf, sizeof(chsbuf), tocode);
1047 mutt_param_set(&b->parameter, "charset", chsbuf);
1050 b->charset = fromcode;
1052 mutt_file_fclose(&fp);
1058 while ((r = fread(buf, 1, sizeof(buf), fp)))
1059 update_content_info(info, &state, buf, r);
1060 update_content_info(info, &state, 0, 0);
1062 mutt_file_fclose(&fp);
1064 if (b && (b->type == TYPE_TEXT) && (!b->noconv && !b->force_charset))
1066 mutt_param_set(&b->parameter, "charset",
1069 C_Charset && !mutt_ch_is_us_ascii(C_Charset) ? C_Charset : "unknown-8bit"));
1076 * mutt_lookup_mime_type - Find the MIME type for an attachment
1077 * @param att Email with attachment
1078 * @param path Path to attachment
1079 * @retval num MIME type, e.g. #TYPE_IMAGE
1081 * Given a file at 'path', see if there is a registered MIME type.
1082 * Returns the major MIME type, and copies the subtype to "d". First look
1083 * in a system mime.types if we can find one, then look for ~/.mime.types.
1084 * The longest match is used so that we can match 'ps.gz' when 'gz' also
1087 int mutt_lookup_mime_type(struct Body *att, const char *path)
1090 char *p = NULL, *q = NULL, *ct = NULL;
1092 char subtype[256], xtype[256];
1093 int szf, sze, cur_sze;
1095 bool found_mimetypes = false;
1102 szf = mutt_str_strlen(path);
1104 for (int count = 0; count < 4; count++)
1106 /* can't use strtok() because we use it in an inner loop below, so use
1107 * a switch statement here instead. */
1110 /* last file with last entry to match wins type/xtype */
1112 /* check default unix mimetypes location first */
1113 mutt_str_strfcpy(buf, "/etc/mime.types", sizeof(buf));
1116 mutt_str_strfcpy(buf, SYSCONFDIR "/mime.types", sizeof(buf));
1119 mutt_str_strfcpy(buf, PKGDATADIR "/mime.types", sizeof(buf));
1122 snprintf(buf, sizeof(buf), "%s/.mime.types", NONULL(HomeDir));
1125 mutt_debug(LL_DEBUG1, "Internal error, count = %d\n", count);
1126 goto bye; /* shouldn't happen */
1129 fp = fopen(buf, "r");
1132 found_mimetypes = true;
1134 while (fgets(buf, sizeof(buf) - 1, fp))
1136 /* weed out any comments */
1137 p = strchr(buf, '#');
1141 /* remove any leading space. */
1145 /* position on the next field in this line */
1146 p = strpbrk(ct, " \t");
1152 /* cycle through the file extensions */
1153 while ((p = strtok(p, " \t\n")))
1155 sze = mutt_str_strlen(p);
1156 if ((sze > cur_sze) && (szf >= sze) &&
1157 ((mutt_str_strcasecmp(path + szf - sze, p) == 0) ||
1158 (mutt_str_strcasecmp(path + szf - sze, p) == 0)) &&
1159 ((szf == sze) || (path[szf - sze - 1] == '.')))
1161 /* get the content-type */
1163 p = strchr(ct, '/');
1166 /* malformed line, just skip it. */
1171 for (q = p; *q && !IS_SPACE(*q); q++)
1174 mutt_str_substr_cpy(subtype, p, q, sizeof(subtype));
1176 type = mutt_check_mime_type(ct);
1177 if (type == TYPE_OTHER)
1178 mutt_str_strfcpy(xtype, ct, sizeof(xtype));
1185 mutt_file_fclose(&fp);
1191 /* no mime.types file found */
1192 if (!found_mimetypes)
1194 mutt_error(_("Could not find any mime.types file."));
1197 if ((type != TYPE_OTHER) || (*xtype != '\0'))
1200 mutt_str_replace(&att->subtype, subtype);
1201 mutt_str_replace(&att->xtype, xtype);
1208 * transform_to_7bit - Convert MIME parts to 7-bit
1209 * @param a Body of the email
1210 * @param fp_in File to read
1212 static void transform_to_7bit(struct Body *a, FILE *fp_in)
1215 struct State s = { 0 };
1218 for (; a; a = a->next)
1220 if (a->type == TYPE_MULTIPART)
1222 if (a->encoding != ENC_7BIT)
1223 a->encoding = ENC_7BIT;
1225 transform_to_7bit(a->parts, fp_in);
1227 else if (mutt_is_message_type(a->type, a->subtype))
1229 mutt_message_to_7bit(a, fp_in);
1234 a->force_charset = true;
1236 mutt_mktemp(buf, sizeof(buf));
1237 s.fp_out = mutt_file_fopen(buf, "w");
1240 mutt_perror("fopen");
1244 mutt_decode_attachment(a, &s);
1245 mutt_file_fclose(&s.fp_out);
1246 FREE(&a->d_filename);
1247 a->d_filename = a->filename;
1248 a->filename = mutt_str_strdup(buf);
1250 if (stat(a->filename, &sb) == -1)
1252 mutt_perror("stat");
1255 a->length = sb.st_size;
1257 mutt_update_encoding(a);
1258 if (a->encoding == ENC_8BIT)
1259 a->encoding = ENC_QUOTED_PRINTABLE;
1260 else if (a->encoding == ENC_BINARY)
1261 a->encoding = ENC_BASE64;
1267 * mutt_message_to_7bit - Convert an email's MIME parts to 7-bit
1268 * @param a Body of the email
1269 * @param fp File to read (OPTIONAL)
1271 void mutt_message_to_7bit(struct Body *a, FILE *fp)
1273 char temp[PATH_MAX];
1276 FILE *fp_out = NULL;
1279 if (!a->filename && fp)
1281 else if (!a->filename || !(fp_in = fopen(a->filename, "r")))
1283 mutt_error(_("Could not open %s"), a->filename ? a->filename : "(null)");
1289 if (stat(a->filename, &sb) == -1)
1291 mutt_perror("stat");
1292 mutt_file_fclose(&fp_in);
1294 a->length = sb.st_size;
1297 mutt_mktemp(temp, sizeof(temp));
1298 fp_out = mutt_file_fopen(temp, "w+");
1301 mutt_perror("fopen");
1308 fseeko(fp_in, a->offset, SEEK_SET);
1309 a->parts = mutt_rfc822_parse_message(fp_in, a);
1311 transform_to_7bit(a->parts, fp_in);
1313 mutt_copy_hdr(fp_in, fp_out, a->offset, a->offset + a->length,
1314 CH_MIME | CH_NONEWLINE | CH_XMIT, NULL);
1316 fputs("MIME-Version: 1.0\n", fp_out);
1317 mutt_write_mime_header(a->parts, fp_out);
1318 fputc('\n', fp_out);
1319 mutt_write_mime_body(a->parts, fp_out);
1324 if (fp_in && (fp_in != fp))
1325 mutt_file_fclose(&fp_in);
1327 mutt_file_fclose(&fp_out);
1331 a->encoding = ENC_7BIT;
1332 FREE(&a->d_filename);
1333 a->d_filename = a->filename;
1334 if (a->filename && a->unlink)
1335 unlink(a->filename);
1336 a->filename = mutt_str_strdup(temp);
1338 if (stat(a->filename, &sb) == -1)
1340 mutt_perror("stat");
1343 a->length = sb.st_size;
1344 mutt_body_free(&a->parts);
1345 a->email->content = NULL;
1349 * set_encoding - determine which Content-Transfer-Encoding to use
1350 * @param[in] b Body of email
1351 * @param[out] info Info about the email
1353 static void set_encoding(struct Body *b, struct Content *info)
1355 if (b->type == TYPE_TEXT)
1357 char send_charset[128];
1358 char *chsname = mutt_body_get_charset(b, send_charset, sizeof(send_charset));
1359 if ((info->lobin && !mutt_str_startswith(chsname, "iso-2022", CASE_IGNORE)) ||
1360 (info->linemax > 990) || (info->from && C_EncodeFrom))
1362 b->encoding = ENC_QUOTED_PRINTABLE;
1364 else if (info->hibin)
1366 b->encoding = C_Allow8bit ? ENC_8BIT : ENC_QUOTED_PRINTABLE;
1370 b->encoding = ENC_7BIT;
1373 else if ((b->type == TYPE_MESSAGE) || (b->type == TYPE_MULTIPART))
1375 if (info->lobin || info->hibin)
1377 if (C_Allow8bit && !info->lobin)
1378 b->encoding = ENC_8BIT;
1380 mutt_message_to_7bit(b, NULL);
1383 b->encoding = ENC_7BIT;
1385 else if ((b->type == TYPE_APPLICATION) &&
1386 (mutt_str_strcasecmp(b->subtype, "pgp-keys") == 0))
1388 b->encoding = ENC_7BIT;
1392 /* Determine which encoding is smaller */
1393 if (1.33 * (float) (info->lobin + info->hibin + info->ascii) <
1394 3.0 * (float) (info->lobin + info->hibin) + (float) info->ascii)
1396 b->encoding = ENC_BASE64;
1400 b->encoding = ENC_QUOTED_PRINTABLE;
1406 * mutt_stamp_attachment - Timestamp an Attachment
1407 * @param a Attachment
1409 void mutt_stamp_attachment(struct Body *a)
1411 a->stamp = time(NULL);
1415 * mutt_body_get_charset - Get a body's character set
1416 * @param b Body to examine
1417 * @param buf Buffer for the result
1418 * @param buflen Length of the buffer
1419 * @retval ptr Buffer containing character set
1420 * @retval NULL On error, or if not a text type
1422 char *mutt_body_get_charset(struct Body *b, char *buf, size_t buflen)
1426 if (b && (b->type != TYPE_TEXT))
1430 p = mutt_param_get(&b->parameter, "charset");
1433 mutt_ch_canonical_charset(buf, buflen, p);
1435 mutt_str_strfcpy(buf, "us-ascii", buflen);
1441 * mutt_update_encoding - Update the encoding type
1442 * @param a Body to update
1444 * Assumes called from send mode where Body->filename points to actual file
1446 void mutt_update_encoding(struct Body *a)
1448 struct Content *info = NULL;
1451 /* override noconv when it's us-ascii */
1452 if (mutt_ch_is_us_ascii(mutt_body_get_charset(a, chsbuf, sizeof(chsbuf))))
1455 if (!a->force_charset && !a->noconv)
1456 mutt_param_delete(&a->parameter, "charset");
1458 info = mutt_get_content_info(a->filename, a);
1462 set_encoding(a, info);
1463 mutt_stamp_attachment(a);
1470 * mutt_make_message_attach - Create a message attachment
1473 * @param attach_msg true if attaching a message
1474 * @retval ptr Newly allocated Body
1475 * @retval NULL Error
1477 struct Body *mutt_make_message_attach(struct Mailbox *m, struct Email *e, bool attach_msg)
1480 struct Body *body = NULL;
1482 CopyMessageFlags cmflags;
1483 SecurityFlags pgp = WithCrypto ? e->security : SEC_NO_FLAGS;
1487 if ((C_MimeForwardDecode || C_ForwardDecrypt) && (e->security & SEC_ENCRYPT))
1489 if (!crypt_valid_passphrase(e->security))
1494 mutt_mktemp(buf, sizeof(buf));
1495 fp = mutt_file_fopen(buf, "w+");
1499 body = mutt_body_new();
1500 body->type = TYPE_MESSAGE;
1501 body->subtype = mutt_str_strdup("rfc822");
1502 body->filename = mutt_str_strdup(buf);
1503 body->unlink = true;
1504 body->use_disp = false;
1505 body->disposition = DISP_INLINE;
1506 body->noconv = true;
1508 mutt_parse_mime_message(m, e);
1510 CopyHeaderFlags chflags = CH_XMIT;
1511 cmflags = MUTT_CM_NO_FLAGS;
1513 /* If we are attaching a message, ignore C_MimeForwardDecode */
1514 if (!attach_msg && C_MimeForwardDecode)
1516 chflags |= CH_MIME | CH_TXTPLAIN;
1517 cmflags = MUTT_CM_DECODE | MUTT_CM_CHARCONV;
1518 if (WithCrypto & APPLICATION_PGP)
1519 pgp &= ~PGP_ENCRYPT;
1520 if (WithCrypto & APPLICATION_SMIME)
1521 pgp &= ~SMIME_ENCRYPT;
1523 else if ((WithCrypto != 0) && C_ForwardDecrypt && (e->security & SEC_ENCRYPT))
1525 if (((WithCrypto & APPLICATION_PGP) != 0) && mutt_is_multipart_encrypted(e->content))
1527 chflags |= CH_MIME | CH_NONEWLINE;
1528 cmflags = MUTT_CM_DECODE_PGP;
1529 pgp &= ~PGP_ENCRYPT;
1531 else if (((WithCrypto & APPLICATION_PGP) != 0) &&
1532 ((mutt_is_application_pgp(e->content) & PGP_ENCRYPT) == PGP_ENCRYPT))
1534 chflags |= CH_MIME | CH_TXTPLAIN;
1535 cmflags = MUTT_CM_DECODE | MUTT_CM_CHARCONV;
1536 pgp &= ~PGP_ENCRYPT;
1538 else if (((WithCrypto & APPLICATION_SMIME) != 0) &&
1539 ((mutt_is_application_smime(e->content) & SMIME_ENCRYPT) == SMIME_ENCRYPT))
1541 chflags |= CH_MIME | CH_TXTPLAIN;
1542 cmflags = MUTT_CM_DECODE | MUTT_CM_CHARCONV;
1543 pgp &= ~SMIME_ENCRYPT;
1547 mutt_copy_message_ctx(fp, m, e, cmflags, chflags);
1552 body->email = mutt_email_new();
1553 body->email->offset = 0;
1554 /* we don't need the user headers here */
1555 body->email->env = mutt_rfc822_read_header(fp, body->email, false, false);
1557 body->email->security = pgp;
1558 mutt_update_encoding(body);
1559 body->parts = body->email->content;
1561 mutt_file_fclose(&fp);
1567 * run_mime_type_query - Run an external command to determine the MIME type
1568 * @param att Attachment
1570 * The command in $mime_type_query_command is run.
1572 static void run_mime_type_query(struct Body *att)
1574 FILE *fp = NULL, *fp_err = NULL;
1579 struct Buffer *cmd = mutt_buffer_pool_get();
1581 mutt_buffer_file_expand_fmt_quote(cmd, C_MimeTypeQueryCommand, att->filename);
1583 pid = mutt_create_filter(mutt_b2s(cmd), NULL, &fp, &fp_err);
1586 mutt_error(_("Error running \"%s\""), mutt_b2s(cmd));
1587 mutt_buffer_pool_release(&cmd);
1590 mutt_buffer_pool_release(&cmd);
1592 buf = mutt_file_read_line(buf, &buflen, fp, &dummy, 0);
1595 if (strchr(buf, '/'))
1596 mutt_parse_content_type(buf, att);
1600 mutt_file_fclose(&fp);
1601 mutt_file_fclose(&fp_err);
1602 mutt_wait_filter(pid);
1606 * mutt_make_file_attach - Create a file attachment
1607 * @param path File to attach
1608 * @retval ptr Newly allocated Body
1609 * @retval NULL Error
1611 struct Body *mutt_make_file_attach(const char *path)
1613 struct Body *att = mutt_body_new();
1614 att->filename = mutt_str_strdup(path);
1616 if (C_MimeTypeQueryCommand && C_MimeTypeQueryFirst)
1617 run_mime_type_query(att);
1619 /* Attempt to determine the appropriate content-type based on the filename
1622 mutt_lookup_mime_type(att, path);
1624 if (!att->subtype && C_MimeTypeQueryCommand && !C_MimeTypeQueryFirst)
1626 run_mime_type_query(att);
1629 struct Content *info = mutt_get_content_info(path, att);
1632 mutt_body_free(&att);
1638 if ((info->nulbin == 0) &&
1639 ((info->lobin == 0) || ((info->lobin + info->hibin + info->ascii) / info->lobin >= 10)))
1641 /* Statistically speaking, there should be more than 10% "lobin"
1642 * chars if this is really a binary file... */
1643 att->type = TYPE_TEXT;
1644 att->subtype = mutt_str_strdup("plain");
1648 att->type = TYPE_APPLICATION;
1649 att->subtype = mutt_str_strdup("octet-stream");
1654 mutt_update_encoding(att);
1659 * get_toplevel_encoding - Find the most restrictive encoding type
1660 * @param a Body to examine
1661 * @retval num Encoding type, e.g. #ENC_7BIT
1663 static int get_toplevel_encoding(struct Body *a)
1667 for (; a; a = a->next)
1669 if (a->encoding == ENC_BINARY)
1671 else if (a->encoding == ENC_8BIT)
1679 * check_boundary - check for duplicate boundary
1680 * @param boundary Boundary to look for
1681 * @param b Body parts to check
1682 * @retval true if duplicate found
1684 static bool check_boundary(const char *boundary, struct Body *b)
1688 if (b->parts && check_boundary(boundary, b->parts))
1691 if (b->next && check_boundary(boundary, b->next))
1694 p = mutt_param_get(&b->parameter, "boundary");
1695 if (p && (mutt_str_strcmp(p, boundary) == 0))
1703 * mutt_make_multipart - Create a multipart email
1704 * @param b Body of email to start
1705 * @retval ptr Newly allocated Body
1707 struct Body *mutt_make_multipart(struct Body *b)
1709 struct Body *new = mutt_body_new();
1710 new->type = TYPE_MULTIPART;
1711 new->subtype = mutt_str_strdup("mixed");
1712 new->encoding = get_toplevel_encoding(b);
1715 mutt_generate_boundary(&new->parameter);
1716 if (check_boundary(mutt_param_get(&new->parameter, "boundary"), b))
1717 mutt_param_delete(&new->parameter, "boundary");
1718 } while (!mutt_param_get(&new->parameter, "boundary"));
1719 new->use_disp = false;
1720 new->disposition = DISP_INLINE;
1727 * mutt_remove_multipart - Extract the multipart body if it exists
1728 * @param b Body to alter
1729 * @retval ptr The parts of the Body
1731 * @note The original Body is freed
1733 struct Body *mutt_remove_multipart(struct Body *b)
1735 struct Body *t = NULL;
1748 * mutt_write_addrlist - wrapper around mutt_write_address()
1749 * @param al Address list
1750 * @param fp File to write to
1751 * @param linelen Line length to use
1752 * @param display True if these addresses will be displayed to the user
1754 * So we can handle very large recipient lists without needing a huge temporary
1757 void mutt_write_addrlist(struct AddressList *al, FILE *fp, int linelen, bool display)
1762 struct Address *a = NULL;
1763 TAILQ_FOREACH(a, al, entries)
1766 mutt_addr_write(buf, sizeof(buf), a, display);
1767 size_t len = mutt_str_strlen(buf);
1768 if (count && (linelen + len > 74))
1771 linelen = len + 8; /* tab is usually about 8 spaces... */
1775 if (count && a->mailbox)
1783 struct Address *next = TAILQ_NEXT(a, entries);
1784 if (!a->group && next && next->mailbox)
1795 * mutt_write_references - Add the message references to a list
1796 * @param r String List of references
1797 * @param fp File to write to
1798 * @param trim Trim the list to at most this many items
1800 * Write the list in reverse because they are stored in reverse order when
1801 * parsed to speed up threading.
1803 void mutt_write_references(const struct ListHead *r, FILE *fp, size_t trim)
1805 struct ListNode *np = NULL;
1808 STAILQ_FOREACH(np, r, entries)
1810 if (++length == trim)
1814 struct ListNode **ref = mutt_mem_calloc(length, sizeof(struct ListNode *));
1816 // store in reverse order
1817 size_t tmp = length;
1818 STAILQ_FOREACH(np, r, entries)
1825 for (size_t i = 0; i < length; i++)
1828 fputs(ref[i]->data, fp);
1829 if (i != length - 1)
1837 * print_val - Add pieces to an email header, wrapping where necessary
1838 * @param fp File to write to
1839 * @param pfx Prefix for headers
1840 * @param value Text to be added
1841 * @param chflags Flags, see #CopyHeaderFlags
1842 * @param col Column that this text starts at
1844 * @retval -1 Failure
1846 static int print_val(FILE *fp, const char *pfx, const char *value,
1847 CopyHeaderFlags chflags, size_t col)
1849 while (value && (value[0] != '\0'))
1851 if (fputc(*value, fp) == EOF)
1853 /* corner-case: break words longer than 998 chars by force,
1854 * mandated by RFC5322 */
1855 if (!(chflags & CH_DISPLAY) && (++col >= 998))
1857 if (fputs("\n ", fp) < 0)
1863 if ((value[1] != '\0') && pfx && (pfx[0] != '\0') && (fputs(pfx, fp) == EOF))
1865 /* for display, turn folding spaces into folding tabs */
1866 if ((chflags & CH_DISPLAY) && ((value[1] == ' ') || (value[1] == '\t')))
1869 while ((value[0] != '\0') && ((value[0] == ' ') || (value[0] == '\t')))
1871 if (fputc('\t', fp) == EOF)
1882 * fold_one_header - Fold one header line
1883 * @param fp File to write to
1884 * @param tag Header key, e.g. "From"
1885 * @param value Header value
1886 * @param pfx Prefix for header
1887 * @param wraplen Column to wrap at
1888 * @param chflags Flags, see #CopyHeaderFlags
1890 * @retval -1 Failure
1892 static int fold_one_header(FILE *fp, const char *tag, const char *value,
1893 const char *pfx, int wraplen, CopyHeaderFlags chflags)
1895 const char *p = value;
1896 char buf[8192] = { 0 };
1897 int first = 1, col = 0, l = 0;
1898 const bool display = (chflags & CH_DISPLAY);
1900 mutt_debug(5, "pfx=[%s], tag=[%s], flags=%d value=[%s]\n", pfx, tag, chflags,
1903 if (tag && *tag && (fprintf(fp, "%s%s: ", NONULL(pfx), tag) < 0))
1905 col = mutt_str_strlen(tag) + ((tag && (tag[0] != '\0')) ? 2 : 0) + mutt_str_strlen(pfx);
1907 while (p && (p[0] != '\0'))
1911 /* find the next word and place it in 'buf'. it may start with
1912 * whitespace we can fold before */
1913 const char *next = mutt_str_find_word(p);
1914 l = MIN(sizeof(buf) - 1, next - p);
1918 /* determine width: character cells for display, bytes for sending
1919 * (we get pure ascii only) */
1920 const int w = mutt_mb_width(buf, col, display);
1921 const int enc = mutt_str_startswith(buf, "=?", CASE_MATCH);
1923 mutt_debug(5, "word=[%s], col=%d, w=%d, next=[0x0%x]\n", buf, col, w, *next);
1925 /* insert a folding \n before the current word's lwsp except for
1926 * header name, first word on a line (word longer than wrap width)
1927 * and encoded words */
1928 if (!first && !enc && col && ((col + w) >= wraplen))
1930 col = mutt_str_strlen(pfx);
1932 if (fprintf(fp, "\n%s", NONULL(pfx)) <= 0)
1936 /* print the actual word; for display, ignore leading ws for word
1937 * and fold with tab for readability */
1938 if (display && fold)
1941 while ((pc[0] != '\0') && ((pc[0] == ' ') || (pc[0] == '\t')))
1946 if (fputc('\t', fp) == EOF)
1948 if (print_val(fp, pfx, pc, chflags, col) < 0)
1952 else if (print_val(fp, pfx, buf, chflags, col) < 0)
1956 /* if the current word ends in \n, ignore all its trailing spaces
1957 * and reset column; this prevents us from putting only spaces (or
1958 * even none) on a line if the trailing spaces are located at our
1959 * current line width
1960 * XXX this covers ASCII space only, for display we probably
1961 * want something like iswspace() here */
1962 const char *sp = next;
1963 while ((sp[0] != '\0') && ((sp[0] == ' ') || (sp[0] == '\t')))
1975 /* if we have printed something but didn't \n-terminate it, do it
1976 * except the last word we printed ended in \n already */
1977 if (col && ((l == 0) || (buf[l - 1] != '\n')))
1978 if (putc('\n', fp) == EOF)
1985 * unfold_header - Unfold a wrapped email header
1986 * @param s String to process
1987 * @retval ptr Unfolded string
1989 * @note The string is altered in-place
1991 static char *unfold_header(char *s)
1996 while (p && (p[0] != '\0'))
1998 /* remove CRLF prior to FWSP, turn \t into ' ' */
1999 if ((p[0] == '\r') && (p[1] != '\0') && (p[1] == '\n') && (p[2] != '\0') &&
2000 ((p[2] == ' ') || (p[2] == '\t')))
2006 /* remove LF prior to FWSP, turn \t into ' ' */
2007 else if ((p[0] == '\n') && (p[1] != '\0') && ((p[1] == ' ') || (p[1] == '\t')))
2022 * write_one_header - Write out one header line
2023 * @param fp File to write to
2024 * @param pfxw Width of prefix string
2025 * @param max Max width
2026 * @param wraplen Column to wrap at
2027 * @param pfx Prefix for header
2028 * @param start Start of header line
2029 * @param end End of header line
2030 * @param chflags Flags, see #CopyHeaderFlags
2032 * @retval -1 Failure
2034 static int write_one_header(FILE *fp, int pfxw, int max, int wraplen, const char *pfx,
2035 const char *start, const char *end, CopyHeaderFlags chflags)
2037 char *tagbuf = NULL, *valbuf = NULL, *t = NULL;
2038 bool is_from = ((end - start) > 5) && mutt_str_startswith(start, "from ", CASE_IGNORE);
2040 /* only pass through folding machinery if necessary for sending,
2041 * never wrap From_ headers on sending */
2042 if (!(chflags & CH_DISPLAY) && ((pfxw + max <= wraplen) || is_from))
2044 valbuf = mutt_str_substr_dup(start, end);
2045 mutt_debug(5, "buf[%s%s] short enough, max width = %d <= %d\n", NONULL(pfx),
2046 valbuf, max, wraplen);
2049 if (fputs(pfx, fp) == EOF)
2056 t = strchr(valbuf, ':');
2059 mutt_debug(LL_DEBUG1, "#1 warning: header not in 'key: value' format!\n");
2063 if (print_val(fp, pfx, valbuf, chflags, mutt_str_strlen(pfx)) < 0)
2072 t = strchr(start, ':');
2073 if (!t || (t > end))
2075 mutt_debug(LL_DEBUG1, "#2 warning: header not in 'key: value' format!\n");
2081 valbuf = mutt_str_substr_dup(start, end);
2085 tagbuf = mutt_str_substr_dup(start, t);
2086 /* skip over the colon separating the header field name and value */
2089 /* skip over any leading whitespace (WSP, as defined in RFC5322)
2090 * NOTE: mutt_str_skip_email_wsp() does the wrong thing here.
2091 * See tickets 3609 and 3716. */
2092 while ((*t == ' ') || (*t == '\t'))
2095 valbuf = mutt_str_substr_dup(t, end);
2097 mutt_debug(LL_DEBUG2, "buf[%s%s] too long, max width = %d > %d\n",
2098 NONULL(pfx), NONULL(valbuf), max, wraplen);
2099 if (fold_one_header(fp, tagbuf, valbuf, pfx, wraplen, chflags) < 0)
2112 * mutt_write_one_header - Write one header line to a file
2113 * @param fp File to write to
2114 * @param tag Header key, e.g. "From"
2115 * @param value Header value
2116 * @param pfx Prefix for header
2117 * @param wraplen Column to wrap at
2118 * @param chflags Flags, see #CopyHeaderFlags
2120 * @retval -1 Failure
2122 * split several headers into individual ones and call write_one_header
2125 int mutt_write_one_header(FILE *fp, const char *tag, const char *value,
2126 const char *pfx, int wraplen, CopyHeaderFlags chflags)
2128 char *p = (char *) value;
2129 char *last = NULL, *line = NULL;
2130 int max = 0, w, rc = -1;
2131 int pfxw = mutt_strwidth(pfx);
2132 char *v = mutt_str_strdup(value);
2133 bool display = (chflags & CH_DISPLAY);
2135 if (!display || C_Weed)
2136 v = unfold_header(v);
2138 /* when not displaying, use sane wrap value */
2141 if ((C_WrapHeaders < 78) || (C_WrapHeaders > 998))
2144 wraplen = C_WrapHeaders;
2146 else if ((wraplen <= 0) || (wraplen > MuttIndexWindow->cols))
2147 wraplen = MuttIndexWindow->cols;
2151 /* if header is short enough, simply print it */
2152 if (!display && (mutt_strwidth(tag) + 2 + pfxw + mutt_strwidth(v) <= wraplen))
2154 mutt_debug(5, "buf[%s%s: %s] is short enough\n", NONULL(pfx), tag, v);
2155 if (fprintf(fp, "%s%s: %s\n", NONULL(pfx), tag, v) <= 0)
2162 rc = fold_one_header(fp, tag, v, pfx, wraplen, chflags);
2172 p = strchr(p, '\n');
2174 /* find maximum line width in current header */
2177 w = mutt_mb_width(line, 0, display);
2187 if ((*p != ' ') && (*p != '\t'))
2189 if (write_one_header(fp, pfxw, max, wraplen, pfx, last, p, chflags) < 0)
2197 if (write_one_header(fp, pfxw, max, wraplen, pfx, last, p, chflags) < 0)
2208 * mutt_rfc822_write_header - Write out one RFC822 header line
2209 * @param fp File to write to
2210 * @param env Envelope of email
2211 * @param attach Attachment
2212 * @param mode Mode, see #MuttWriteHeaderMode
2213 * @param privacy If true, remove headers that might identify the user
2214 * @param hide_protected_subject If true, replace subject header
2216 * @retval -1 Failure
2218 * Note: all RFC2047 encoding should be done outside of this routine, except
2219 * for the "real name." This will allow this routine to be used more than
2220 * once, if necessary.
2222 * Likewise, all IDN processing should happen outside of this routine.
2224 * privacy true => will omit any headers which may identify the user.
2225 * Output generated is suitable for being sent through
2226 * anonymous remailer chains.
2228 * hide_protected_subject: replaces the Subject header with
2229 * $crypt_protected_headers_subject in NORMAL or POSTPONE mode.
2231 int mutt_rfc822_write_header(FILE *fp, struct Envelope *env,
2232 struct Body *attach, enum MuttWriteHeaderMode mode,
2233 bool privacy, bool hide_protected_subject)
2236 char *p = NULL, *q = NULL;
2237 bool has_agent = false; /* user defined user-agent header field exists */
2239 if ((mode == MUTT_WRITE_HEADER_NORMAL) && !privacy)
2240 fputs(mutt_date_make_date(buf, sizeof(buf)), fp);
2242 /* UseFrom is not consulted here so that we can still write a From:
2243 * field if the user sets it with the 'my_hdr' command */
2244 if (!TAILQ_EMPTY(&env->from) && !privacy)
2247 mutt_addrlist_write(buf, sizeof(buf), &env->from, false);
2248 fprintf(fp, "From: %s\n", buf);
2251 if (!TAILQ_EMPTY(&env->sender) && !privacy)
2254 mutt_addrlist_write(buf, sizeof(buf), &env->sender, false);
2255 fprintf(fp, "Sender: %s\n", buf);
2258 if (!TAILQ_EMPTY(&env->to))
2261 mutt_write_addrlist(&env->to, fp, 4, 0);
2263 else if (mode == MUTT_WRITE_HEADER_EDITHDRS)
2269 if (!TAILQ_EMPTY(&env->cc))
2272 mutt_write_addrlist(&env->cc, fp, 4, 0);
2274 else if (mode == MUTT_WRITE_HEADER_EDITHDRS)
2280 if (!TAILQ_EMPTY(&env->bcc))
2282 if ((mode == MUTT_WRITE_HEADER_POSTPONE) || (mode == MUTT_WRITE_HEADER_EDITHDRS) ||
2283 ((mode == MUTT_WRITE_HEADER_NORMAL) && C_WriteBcc))
2286 mutt_write_addrlist(&env->bcc, fp, 5, 0);
2289 else if (mode == MUTT_WRITE_HEADER_EDITHDRS)
2293 fputs("Bcc:\n", fp);
2296 if (env->newsgroups)
2297 fprintf(fp, "Newsgroups: %s\n", env->newsgroups);
2298 else if ((mode == MUTT_WRITE_HEADER_EDITHDRS) && OptNewsSend)
2299 fputs("Newsgroups:\n", fp);
2301 if (env->followup_to)
2302 fprintf(fp, "Followup-To: %s\n", env->followup_to);
2303 else if ((mode == MUTT_WRITE_HEADER_EDITHDRS) && OptNewsSend)
2304 fputs("Followup-To:\n", fp);
2306 if (env->x_comment_to)
2307 fprintf(fp, "X-Comment-To: %s\n", env->x_comment_to);
2308 else if ((mode == MUTT_WRITE_HEADER_EDITHDRS) && OptNewsSend && C_XCommentTo)
2309 fputs("X-Comment-To:\n", fp);
2314 if (hide_protected_subject &&
2315 ((mode == MUTT_WRITE_HEADER_NORMAL) || (mode == MUTT_WRITE_HEADER_POSTPONE)))
2316 mutt_write_one_header(fp, "Subject", C_CryptProtectedHeadersSubject, NULL, 0, CH_NO_FLAGS);
2318 mutt_write_one_header(fp, "Subject", env->subject, NULL, 0, CH_NO_FLAGS);
2320 else if (mode == MUTT_WRITE_HEADER_EDITHDRS)
2321 fputs("Subject:\n", fp);
2323 /* save message id if the user has set it */
2324 if (env->message_id && !privacy)
2325 fprintf(fp, "Message-ID: %s\n", env->message_id);
2327 if (!TAILQ_EMPTY(&env->reply_to))
2329 fputs("Reply-To: ", fp);
2330 mutt_write_addrlist(&env->reply_to, fp, 10, 0);
2332 else if (mode == MUTT_WRITE_HEADER_EDITHDRS)
2333 fputs("Reply-To:\n", fp);
2335 if (!TAILQ_EMPTY(&env->mail_followup_to))
2340 fputs("Mail-Followup-To: ", fp);
2341 mutt_write_addrlist(&env->mail_followup_to, fp, 18, 0);
2344 if ((mode == MUTT_WRITE_HEADER_NORMAL) || (mode == MUTT_WRITE_HEADER_POSTPONE))
2346 if (!STAILQ_EMPTY(&env->references))
2348 fputs("References:", fp);
2349 mutt_write_references(&env->references, fp, 10);
2353 /* Add the MIME headers */
2354 fputs("MIME-Version: 1.0\n", fp);
2355 mutt_write_mime_header(attach, fp);
2358 if (!STAILQ_EMPTY(&env->in_reply_to))
2360 fputs("In-Reply-To:", fp);
2361 mutt_write_references(&env->in_reply_to, fp, 0);
2365 /* Add any user defined headers */
2366 struct ListNode *tmp = NULL;
2367 STAILQ_FOREACH(tmp, &env->userhdrs, entries)
2369 p = strchr(tmp->data, ':');
2376 p = mutt_str_skip_email_wsp(p + 1);
2380 continue; /* don't emit empty fields. */
2383 /* check to see if the user has overridden the user-agent field */
2384 if (mutt_str_startswith(tmp->data, "user-agent", CASE_IGNORE))
2394 mutt_write_one_header(fp, tmp->data, p, NULL, 0, CH_NO_FLAGS);
2399 if ((mode == MUTT_WRITE_HEADER_NORMAL) && !privacy && C_UserAgent && !has_agent)
2401 /* Add a vanity header */
2402 fprintf(fp, "User-Agent: NeoMutt/%s%s\n", PACKAGE_VERSION, GitVer);
2405 return (ferror(fp) == 0) ? 0 : -1;
2409 * encode_headers - RFC2047-encode a list of headers
2410 * @param h String List of headers
2412 * The strings are encoded in-place.
2414 static void encode_headers(struct ListHead *h)
2420 struct ListNode *np = NULL;
2421 STAILQ_FOREACH(np, h, entries)
2423 p = strchr(np->data, ':');
2428 p = mutt_str_skip_email_wsp(p + 1);
2429 tmp = mutt_str_strdup(p);
2434 rfc2047_encode(&tmp, NULL, i + 2, C_SendCharset);
2435 mutt_mem_realloc(&np->data, i + 2 + mutt_str_strlen(tmp) + 1);
2437 sprintf(np->data + i + 2, "%s", tmp);
2444 * mutt_fqdn - Get the Fully-Qualified Domain Name
2445 * @param may_hide_host If true, hide the hostname (leaving just the domain)
2446 * @retval ptr string pointer into Hostname
2447 * @retval NULL Error, e.g no Hostname
2449 * @warning Do not free the returned pointer
2451 const char *mutt_fqdn(bool may_hide_host)
2453 if (!C_Hostname || (C_Hostname[0] == '@'))
2456 char *p = C_Hostname;
2458 if (may_hide_host && C_HiddenHost)
2460 p = strchr(C_Hostname, '.');
2464 // sanity check: don't hide the host if the fqdn is something like example.com
2465 if (!p || !strchr(p, '.'))
2473 * gen_msgid - Generate a unique Message ID
2474 * @retval ptr Message ID
2476 * @note The caller should free the string
2478 static char *gen_msgid(void)
2481 unsigned char rndid[MUTT_RANDTAG_LEN + 1];
2483 mutt_rand_base32(rndid, sizeof(rndid) - 1);
2484 rndid[MUTT_RANDTAG_LEN] = 0;
2485 const char *fqdn = mutt_fqdn(false);
2487 fqdn = NONULL(ShortHostname);
2489 struct tm tm = mutt_date_gmtime(MUTT_DATE_NOW);
2490 snprintf(buf, sizeof(buf), "<%d%02d%02d%02d%02d%02d.%s@%s>", tm.tm_year + 1900,
2491 tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec, rndid, fqdn);
2492 return mutt_str_strdup(buf);
2496 * alarm_handler - Async notification of an alarm signal
2497 * @param sig Signal, (SIGALRM)
2499 static void alarm_handler(int sig)
2505 * send_msg - invoke sendmail in a subshell
2506 * @param[in] path Path to program to execute
2507 * @param[in] args Arguments to pass to program
2508 * @param[in] msg Temp file containing message to send
2509 * @param[out] tempfile If sendmail is put in the background, this points
2510 * to the temporary file containing the stdout of the
2511 * child process. If it is NULL, stderr and stdout
2512 * are not redirected.
2514 * @retval >0 Failure, return code from sendmail
2516 static int send_msg(const char *path, char **args, const char *msg, char **tempfile)
2521 mutt_sig_block_system();
2524 /* we also don't want to be stopped right now */
2525 sigaddset(&set, SIGTSTP);
2526 sigprocmask(SIG_BLOCK, &set, NULL);
2528 if ((C_SendmailWait >= 0) && tempfile)
2532 mutt_mktemp(tmp, sizeof(tmp));
2533 *tempfile = mutt_str_strdup(tmp);
2539 struct sigaction act, oldalrm;
2541 /* save parent's ID before setsid() */
2542 pid_t ppid = getppid();
2544 /* we want the delivery to continue even after the main process dies,
2545 * so we put ourselves into another session right away */
2548 /* next we close all open files */
2551 for (int fd = tempfile ? 1 : 3; fd < OPEN_MAX; fd++)
2553 #elif defined(_POSIX_OPEN_MAX)
2554 for (int fd = tempfile ? 1 : 3; fd < _POSIX_OPEN_MAX; fd++)
2564 /* now the second fork() */
2568 /* "msg" will be opened as stdin */
2569 if (open(msg, O_RDONLY, 0) < 0)
2576 if ((C_SendmailWait >= 0) && tempfile && *tempfile)
2578 /* *tempfile will be opened as stdout */
2579 if (open(*tempfile, O_WRONLY | O_APPEND | O_CREAT | O_EXCL, 0600) < 0)
2581 /* redirect stderr to *tempfile too */
2587 if (open("/dev/null", O_WRONLY | O_APPEND) < 0) /* stdout */
2589 if (open("/dev/null", O_RDWR | O_APPEND) < 0) /* stderr */
2593 /* execvpe is a glibc extension */
2594 /* execvpe (path, args, mutt_envlist_getlist()); */
2605 /* C_SendmailWait > 0: interrupt waitpid() after C_SendmailWait seconds
2606 * C_SendmailWait = 0: wait forever
2607 * C_SendmailWait < 0: don't wait */
2608 if (C_SendmailWait > 0)
2611 act.sa_handler = alarm_handler;
2613 /* need to make sure waitpid() is interrupted on SIGALRM */
2614 act.sa_flags = SA_INTERRUPT;
2618 sigemptyset(&act.sa_mask);
2619 sigaction(SIGALRM, &act, &oldalrm);
2620 alarm(C_SendmailWait);
2622 else if (C_SendmailWait < 0)
2623 _exit(0xff & EX_OK);
2625 if (waitpid(pid, &st, 0) > 0)
2627 st = WIFEXITED(st) ? WEXITSTATUS(st) : S_ERR;
2628 if (C_SendmailWait && (st == (0xff & EX_OK)) && tempfile && *tempfile)
2630 unlink(*tempfile); /* no longer needed */
2636 st = ((C_SendmailWait > 0) && (errno == EINTR) && SigAlrm) ? S_BKG : S_ERR;
2637 if ((C_SendmailWait > 0) && tempfile && *tempfile)
2644 if (C_SendmailWait > 0)
2646 /* reset alarm; not really needed, but... */
2648 sigaction(SIGALRM, &oldalrm, NULL);
2651 if ((kill(ppid, 0) == -1) && (errno == ESRCH) && tempfile && *tempfile)
2653 /* the parent is already dead */
2661 sigprocmask(SIG_UNBLOCK, &set, NULL);
2663 if ((pid != -1) && (waitpid(pid, &st, 0) > 0))
2664 st = WIFEXITED(st) ? WEXITSTATUS(st) : S_ERR; /* return child status */
2666 st = S_ERR; /* error */
2668 mutt_sig_unblock_system(true);
2674 * add_args_one - Add an Address to a dynamic array
2675 * @param[out] args Array to add to
2676 * @param[out] argslen Number of entries in array
2677 * @param[out] argsmax Allocated size of the array
2678 * @param[in] addr Address to add
2679 * @retval ptr Updated array
2681 static char **add_args_one(char **args, size_t *argslen, size_t *argsmax, struct Address *addr)
2683 /* weed out group mailboxes, since those are for display only */
2684 if (addr->mailbox && !addr->group)
2686 if (*argslen == *argsmax)
2687 mutt_mem_realloc(&args, (*argsmax += 5) * sizeof(char *));
2688 args[(*argslen)++] = addr->mailbox;
2694 * add_args - Add a list of Addresses to a dynamic array
2695 * @param[out] args Array to add to
2696 * @param[out] argslen Number of entries in array
2697 * @param[out] argsmax Allocated size of the array
2698 * @param[in] al Addresses to add
2699 * @retval ptr Updated array
2701 static char **add_args(char **args, size_t *argslen, size_t *argsmax, struct AddressList *al)
2703 struct Address *a = NULL;
2704 TAILQ_FOREACH(a, al, entries)
2706 args = add_args_one(args, argslen, argsmax, a);
2712 * add_option - Add a string to a dynamic array
2713 * @param[out] args Array to add to
2714 * @param[out] argslen Number of entries in array
2715 * @param[out] argsmax Allocated size of the array
2716 * @param[in] s string to add
2717 * @retval ptr Updated array
2719 * @note The array may be realloc()'d
2721 static char **add_option(char **args, size_t *argslen, size_t *argsmax, char *s)
2723 if (*argslen == *argsmax)
2724 mutt_mem_realloc(&args, (*argsmax += 5) * sizeof(char *));
2725 args[(*argslen)++] = s;
2730 * mutt_invoke_sendmail - Run sendmail
2731 * @param from The sender
2732 * @param to Recipients
2733 * @param cc Recipients
2734 * @param bcc Recipients
2735 * @param msg File containing message
2736 * @param eightbit Message contains 8bit chars
2738 * @retval -1 Failure
2740 int mutt_invoke_sendmail(struct AddressList *from, struct AddressList *to,
2741 struct AddressList *cc, struct AddressList *bcc,
2742 const char *msg, int eightbit)
2744 char *ps = NULL, *path = NULL, *s = NULL, *childout = NULL;
2746 size_t argslen = 0, argsmax = 0;
2747 char **extra_args = NULL;
2755 mutt_expando_format(cmd, sizeof(cmd), 0, MuttIndexWindow->cols,
2756 NONULL(C_Inews), nntp_format_str, 0, MUTT_FORMAT_NO_FLAGS);
2759 i = nntp_post(Context->mailbox, msg);
2764 s = mutt_str_strdup(cmd);
2768 s = mutt_str_strdup(C_Sendmail);
2770 /* ensure that $sendmail is set to avoid a crash. http://dev.mutt.org/trac/ticket/3548 */
2773 mutt_error(_("$sendmail must be set in order to send mail"));
2779 while ((ps = strtok(ps, " ")))
2781 if (argslen == argsmax)
2782 mutt_mem_realloc(&args, sizeof(char *) * (argsmax += 5));
2786 if (mutt_str_strcmp(ps, "--") == 0)
2788 args[argslen++] = ps;
2792 path = mutt_str_strdup(ps);
2793 ps = strrchr(ps, '/');
2798 args[argslen++] = ps;
2808 size_t extra_argslen = 0;
2809 /* If C_Sendmail contained a "--", we save the recipients to append to
2810 * args after other possible options added below. */
2814 size_t extra_argsmax = 0;
2815 while ((ps = strtok(ps, " ")))
2817 if (extra_argslen == extra_argsmax)
2818 mutt_mem_realloc(&extra_args, sizeof(char *) * (extra_argsmax += 5));
2820 extra_args[extra_argslen++] = ps;
2825 if (eightbit && C_Use8bitmime)
2826 args = add_option(args, &argslen, &argsmax, "-B8BITMIME");
2828 if (C_UseEnvelopeFrom)
2830 if (C_EnvelopeFromAddress)
2832 args = add_option(args, &argslen, &argsmax, "-f");
2833 args = add_args_one(args, &argslen, &argsmax, C_EnvelopeFromAddress);
2835 else if (!TAILQ_EMPTY(from) && !TAILQ_NEXT(TAILQ_FIRST(from), entries))
2837 args = add_option(args, &argslen, &argsmax, "-f");
2838 args = add_args(args, &argslen, &argsmax, from);
2844 args = add_option(args, &argslen, &argsmax, "-N");
2845 args = add_option(args, &argslen, &argsmax, C_DsnNotify);
2849 args = add_option(args, &argslen, &argsmax, "-R");
2850 args = add_option(args, &argslen, &argsmax, C_DsnReturn);
2852 args = add_option(args, &argslen, &argsmax, "--");
2853 for (i = 0; i < extra_argslen; i++)
2854 args = add_option(args, &argslen, &argsmax, extra_args[i]);
2855 args = add_args(args, &argslen, &argsmax, to);
2856 args = add_args(args, &argslen, &argsmax, cc);
2857 args = add_args(args, &argslen, &argsmax, bcc);
2862 if (argslen == argsmax)
2863 mutt_mem_realloc(&args, sizeof(char *) * (++argsmax));
2865 args[argslen++] = NULL;
2867 /* Some user's $sendmail command uses gpg for password decryption,
2868 * and is set up to prompt using ncurses pinentry. If we
2869 * mutt_endwin() it leaves other users staring at a blank screen.
2870 * So instead, just force a hard redraw on the next refresh. */
2872 mutt_need_hard_redraw();
2874 i = send_msg(path, args, msg, OptNoCurses ? NULL : &childout);
2875 if (i != (EX_OK & 0xff))
2879 const char *e = mutt_str_sysexit(i);
2880 mutt_error(_("Error sending message, child exited %d (%s)"), i, NONULL(e));
2885 if ((stat(childout, &st) == 0) && (st.st_size > 0))
2886 mutt_do_pager(_("Output of the delivery process"), childout,
2887 MUTT_PAGER_NO_FLAGS, NULL);
2900 if (i == (EX_OK & 0xff))
2902 else if (i == S_BKG)
2910 * mutt_prepare_envelope - Prepare an email header
2911 * @param env Envelope to prepare
2912 * @param final true if this email is going to be sent (not postponed)
2914 * Encode all the headers prior to sending the email.
2916 * For postponing (!final) do the necessary encodings only
2918 void mutt_prepare_envelope(struct Envelope *env, bool final)
2922 if (!TAILQ_EMPTY(&env->bcc) && TAILQ_EMPTY(&env->to) && TAILQ_EMPTY(&env->cc))
2924 /* some MTA's will put an Apparently-To: header field showing the Bcc:
2925 * recipients if there is no To: or Cc: field, so attempt to suppress
2926 * it by using an empty To: field. */
2927 struct Address *to = mutt_addr_new();
2929 mutt_addrlist_append(&env->to, to);
2930 mutt_addrlist_append(&env->to, mutt_addr_new());
2934 mutt_addr_cat(buf, sizeof(buf), "undisclosed-recipients", AddressSpecials);
2936 to->mailbox = mutt_str_strdup(buf);
2939 mutt_set_followup_to(env);
2941 if (!env->message_id)
2942 env->message_id = gen_msgid();
2945 /* Take care of 8-bit => 7-bit conversion. */
2946 rfc2047_encode_envelope(env);
2947 encode_headers(&env->userhdrs);
2951 * mutt_unprepare_envelope - Undo the encodings of mutt_prepare_envelope()
2952 * @param env Envelope to unprepare
2954 * Decode all the headers of an email, e.g. when the sending failed or was
2957 void mutt_unprepare_envelope(struct Envelope *env)
2959 struct ListNode *item = NULL;
2960 STAILQ_FOREACH(item, &env->userhdrs, entries)
2962 rfc2047_decode(&item->data);
2965 mutt_addrlist_clear(&env->mail_followup_to);
2967 /* back conversions */
2968 rfc2047_decode_envelope(env);
2972 * bounce_message - Bounce an email message
2973 * @param fp Handle of message
2975 * @param to Address to bounce to
2976 * @param resent_from Address of new sender
2977 * @param env_from Envelope of original sender
2979 * @retval -1 Failure
2981 static int bounce_message(FILE *fp, struct Email *e, struct AddressList *to,
2982 const char *resent_from, struct AddressList *env_from)
2988 char tempfile[PATH_MAX];
2990 mutt_mktemp(tempfile, sizeof(tempfile));
2991 FILE *fp_tmp = mutt_file_fopen(tempfile, "w");
2995 CopyHeaderFlags chflags = CH_XMIT | CH_NONEWLINE | CH_NOQFROM;
2997 if (!C_BounceDelivered)
2998 chflags |= CH_WEED_DELIVERED;
3000 fseeko(fp, e->offset, SEEK_SET);
3001 fprintf(fp_tmp, "Resent-From: %s", resent_from);
3002 fprintf(fp_tmp, "\nResent-%s", mutt_date_make_date(date, sizeof(date)));
3003 char *msgid_str = gen_msgid();
3004 fprintf(fp_tmp, "Resent-Message-ID: %s\n", msgid_str);
3006 fputs("Resent-To: ", fp_tmp);
3007 mutt_write_addrlist(to, fp_tmp, 11, 0);
3008 mutt_copy_header(fp, e, fp_tmp, chflags, NULL);
3009 fputc('\n', fp_tmp);
3010 mutt_file_copy_bytes(fp, fp_tmp, e->content->length);
3011 if (mutt_file_fclose(&fp_tmp) != 0)
3013 mutt_perror(tempfile);
3019 rc = mutt_smtp_send(env_from, to, NULL, NULL, tempfile, e->content->encoding == ENC_8BIT);
3022 rc = mutt_invoke_sendmail(env_from, to, NULL, NULL, tempfile,
3023 e->content->encoding == ENC_8BIT);
3030 * mutt_bounce_message - Bounce an email message
3031 * @param fp Handle of message
3033 * @param to AddressList to bounce to
3035 * @retval -1 Failure
3037 int mutt_bounce_message(FILE *fp, struct Email *e, struct AddressList *to)
3039 if (!fp || !e || !to || TAILQ_EMPTY(to))
3042 const char *fqdn = mutt_fqdn(true);
3043 char resent_from[256];
3046 resent_from[0] = '\0';
3047 struct Address *from = mutt_default_from();
3048 struct AddressList from_list = TAILQ_HEAD_INITIALIZER(from_list);
3049 mutt_addrlist_append(&from_list, from);
3051 /* mutt_default_from() does not use $realname if the real name is not set
3052 * in $from, so we add it here. The reason it is not added in
3053 * mutt_default_from() is that during normal sending, we execute
3054 * send-hooks and set the realname last so that it can be changed based
3055 * upon message criteria. */
3056 if (!from->personal)
3057 from->personal = mutt_str_strdup(C_Realname);
3059 mutt_addrlist_qualify(&from_list, fqdn);
3061 rfc2047_encode_addrlist(&from_list, "Resent-From");
3062 if (mutt_addrlist_to_intl(&from_list, &err))
3064 mutt_error(_("Bad IDN %s while preparing resent-from"), err);
3066 mutt_addrlist_clear(&from_list);
3069 mutt_addrlist_write(resent_from, sizeof(resent_from), &from_list, false);
3072 OptNewsSend = false;
3075 /* prepare recipient list. idna conversion appears to happen before this
3076 * function is called, since the user receives confirmation of the address
3077 * list being bounced to. */
3078 struct AddressList resent_to = TAILQ_HEAD_INITIALIZER(resent_to);
3079 mutt_addrlist_copy(&resent_to, to, false);
3080 rfc2047_encode_addrlist(&resent_to, "Resent-To");
3081 int rc = bounce_message(fp, e, &resent_to, resent_from, &from_list);
3082 mutt_addrlist_clear(&resent_to);
3083 mutt_addrlist_clear(&from_list);
3089 * set_noconv_flags - Set/reset the "x-mutt-noconv" flag
3090 * @param b Body of email
3091 * @param flag If true, set the flag, otherwise remove it
3093 static void set_noconv_flags(struct Body *b, bool flag)
3095 for (; b; b = b->next)
3097 if ((b->type == TYPE_MESSAGE) || (b->type == TYPE_MULTIPART))
3098 set_noconv_flags(b->parts, flag);
3099 else if ((b->type == TYPE_TEXT) && b->noconv)
3102 mutt_param_set(&b->parameter, "x-mutt-noconv", "yes");
3104 mutt_param_delete(&b->parameter, "x-mutt-noconv");
3110 * mutt_write_multiple_fcc - Handle FCC with multiple, comma separated entries
3111 * @param[in] path Path to mailboxes (comma separated)
3112 * @param[in] e Email
3113 * @param[in] msgid Message id
3114 * @param[in] post If true, postpone message
3115 * @param[in] fcc fcc setting to save (postpone only)
3116 * @param[out] finalpath Final path of email
3118 * @retval -1 Failure
3120 int mutt_write_multiple_fcc(const char *path, struct Email *e, const char *msgid,
3121 bool post, char *fcc, char **finalpath)
3123 char fcc_tok[PATH_MAX];
3124 char fcc_expanded[PATH_MAX];
3126 mutt_str_strfcpy(fcc_tok, path, sizeof(fcc_tok));
3128 char *tok = strtok(fcc_tok, ",");
3132 mutt_debug(LL_DEBUG1, "Fcc: initial mailbox = '%s'\n", tok);
3133 /* mutt_expand_path already called above for the first token */
3134 int status = mutt_write_fcc(tok, e, msgid, post, fcc, finalpath);
3138 while ((tok = strtok(NULL, ",")))
3143 /* Only call mutt_expand_path if tok has some data */
3144 mutt_debug(LL_DEBUG1, "Fcc: additional mailbox token = '%s'\n", tok);
3145 mutt_str_strfcpy(fcc_expanded, tok, sizeof(fcc_expanded));
3146 mutt_expand_path(fcc_expanded, sizeof(fcc_expanded));
3147 mutt_debug(LL_DEBUG1, " Additional mailbox expanded = '%s'\n", fcc_expanded);
3148 status = mutt_write_fcc(fcc_expanded, e, msgid, post, fcc, finalpath);
3157 * mutt_write_fcc - Write email to FCC mailbox
3158 * @param[in] path Path to mailbox
3159 * @param[in] e Email
3160 * @param[in] msgid Message id
3161 * @param[in] post If true, postpone message
3162 * @param[in] fcc fcc setting to save (postpone only)
3163 * @param[out] finalpath Final path of email
3165 * @retval -1 Failure
3167 int mutt_write_fcc(const char *path, struct Email *e, const char *msgid,
3168 bool post, char *fcc, char **finalpath)
3170 struct Message *msg = NULL;
3171 char tempfile[PATH_MAX];
3172 FILE *fp_tmp = NULL;
3174 bool need_mailbox_cleanup = false;
3177 MsgOpenFlags onm_flags;
3180 set_noconv_flags(e->content, true);
3182 #ifdef RECORD_FOLDER_HOOK
3183 mutt_folder_hook(path, NULL);
3185 struct Mailbox *m_fcc = mx_path_resolve(path);
3186 bool old_append = m_fcc->append;
3187 struct Context *ctx_fcc = mx_mbox_open(m_fcc, MUTT_APPEND | MUTT_QUIET);
3190 mutt_debug(LL_DEBUG1, "unable to open mailbox %s in append-mode, aborting\n", path);
3191 mailbox_free(&m_fcc);
3195 /* We need to add a Content-Length field to avoid problems where a line in
3196 * the message body begins with "From " */
3197 if ((ctx_fcc->mailbox->magic == MUTT_MMDF) || (ctx_fcc->mailbox->magic == MUTT_MBOX))
3199 mutt_mktemp(tempfile, sizeof(tempfile));
3200 fp_tmp = mutt_file_fopen(tempfile, "w+");
3203 mutt_perror(tempfile);
3204 mx_mbox_close(&ctx_fcc);
3207 /* remember new mail status before appending message */
3208 need_mailbox_cleanup = true;
3212 e->read = !post; /* make sure to put it in the 'cur' directory (maildir) */
3213 onm_flags = MUTT_ADD_FROM;
3215 onm_flags |= MUTT_SET_DRAFT;
3216 msg = mx_msg_open_new(ctx_fcc->mailbox, e, onm_flags);
3219 mutt_file_fclose(&fp_tmp);
3220 mx_mbox_close(&ctx_fcc);
3224 /* post == 1 => postpone message.
3225 * post == 0 => Normal mode. */
3226 mutt_rfc822_write_header(
3227 msg->fp, e->env, e->content, post ? MUTT_WRITE_HEADER_POSTPONE : MUTT_WRITE_HEADER_NORMAL,
3228 false, C_CryptProtectedHeadersRead && mutt_should_hide_protected_subject(e));
3230 /* (postponement) if this was a reply of some sort, <msgid> contains the
3231 * Message-ID: of message replied to. Save it using a special X-Mutt-
3232 * header so it can be picked up if the message is recalled at a later
3233 * point in time. This will allow the message to be marked as replied if
3234 * the same mailbox is still open. */
3236 fprintf(msg->fp, "X-Mutt-References: %s\n", msgid);
3238 /* (postponement) save the Fcc: using a special X-Mutt- header so that
3239 * it can be picked up when the message is recalled */
3241 fprintf(msg->fp, "X-Mutt-Fcc: %s\n", fcc);
3243 if ((ctx_fcc->mailbox->magic == MUTT_MMDF) || (ctx_fcc->mailbox->magic == MUTT_MBOX))
3244 fprintf(msg->fp, "Status: RO\n");
3246 /* mutt_rfc822_write_header() only writes out a Date: header with
3247 * mode == 0, i.e. _not_ postponement; so write out one ourself */
3249 fprintf(msg->fp, "%s", mutt_date_make_date(buf, sizeof(buf)));
3251 /* (postponement) if the mail is to be signed or encrypted, save this info */
3252 if (((WithCrypto & APPLICATION_PGP) != 0) && post && (e->security & APPLICATION_PGP))
3254 fputs("X-Mutt-PGP: ", msg->fp);
3255 if (e->security & SEC_ENCRYPT)
3256 fputc('E', msg->fp);
3257 if (e->security & SEC_OPPENCRYPT)
3258 fputc('O', msg->fp);
3259 if (e->security & SEC_SIGN)
3261 fputc('S', msg->fp);
3263 fprintf(msg->fp, "<%s>", C_PgpSignAs);
3265 if (e->security & SEC_INLINE)
3266 fputc('I', msg->fp);
3267 fputc('\n', msg->fp);
3270 /* (postponement) if the mail is to be signed or encrypted, save this info */
3271 if (((WithCrypto & APPLICATION_SMIME) != 0) && post && (e->security & APPLICATION_SMIME))
3273 fputs("X-Mutt-SMIME: ", msg->fp);
3274 if (e->security & SEC_ENCRYPT)
3276 fputc('E', msg->fp);
3277 if (C_SmimeEncryptWith)
3278 fprintf(msg->fp, "C<%s>", C_SmimeEncryptWith);
3280 if (e->security & SEC_OPPENCRYPT)
3281 fputc('O', msg->fp);
3282 if (e->security & SEC_SIGN)
3284 fputc('S', msg->fp);
3286 fprintf(msg->fp, "<%s>", C_SmimeSignAs);
3288 if (e->security & SEC_INLINE)
3289 fputc('I', msg->fp);
3290 fputc('\n', msg->fp);
3294 /* (postponement) if the mail is to be sent through a mixmaster
3295 * chain, save that information */
3297 if (post && !STAILQ_EMPTY(&e->chain))
3299 fputs("X-Mutt-Mix:", msg->fp);
3300 struct ListNode *p = NULL;
3301 STAILQ_FOREACH(p, &e->chain, entries)
3303 fprintf(msg->fp, " %s", (char *) p->data);
3306 fputc('\n', msg->fp);
3312 mutt_write_mime_body(e->content, fp_tmp);
3314 /* make sure the last line ends with a newline. Emacs doesn't ensure this
3315 * will happen, and it can cause problems parsing the mailbox later. */
3316 fseek(fp_tmp, -1, SEEK_END);
3317 if (fgetc(fp_tmp) != '\n')
3319 fseek(fp_tmp, 0, SEEK_END);
3320 fputc('\n', fp_tmp);
3326 mutt_debug(LL_DEBUG1, "%s: write failed\n", tempfile);
3327 mutt_file_fclose(&fp_tmp);
3329 mx_msg_commit(ctx_fcc->mailbox, msg); /* XXX really? */
3330 mx_msg_close(ctx_fcc->mailbox, &msg);
3331 mx_mbox_close(&ctx_fcc);
3335 /* count the number of lines */
3337 char line_buf[1024];
3339 while (fgets(line_buf, sizeof(line_buf), fp_tmp))
3341 fprintf(msg->fp, "Content-Length: " OFF_T_FMT "\n", (LOFF_T) ftello(fp_tmp));
3342 fprintf(msg->fp, "Lines: %d\n\n", lines);
3344 /* copy the body and clean up */
3346 rc = mutt_file_copy_stream(fp_tmp, msg->fp);
3347 if (fclose(fp_tmp) != 0)
3349 /* if there was an error, leave the temp version */
3355 fputc('\n', msg->fp); /* finish off the header */
3356 rc = mutt_write_mime_body(e->content, msg->fp);
3359 if (mx_msg_commit(ctx_fcc->mailbox, msg) != 0)
3362 *finalpath = mutt_str_strdup(msg->committed_path);
3363 mx_msg_close(ctx_fcc->mailbox, &msg);
3364 mx_mbox_close(&ctx_fcc);
3366 if (!post && need_mailbox_cleanup)
3367 mutt_mailbox_cleanup(path, &st);
3370 set_noconv_flags(e->content, false);
3373 m_fcc->append = old_append;
3374 #ifdef RECORD_FOLDER_HOOK
3375 /* We ran a folder hook for the destination mailbox,
3376 * now we run it for the user's current mailbox */
3377 if (Context && Context->mailbox->path)
3378 mutt_folder_hook(Context->mailbox->path, Context->mailbox->desc);