NeoMutt  2021-02-05-666-ge300cd
Teaching an old dog new tricks
DOXYGEN
header.c
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1 
29 #include "config.h"
30 #include <stdbool.h>
31 #include <stdlib.h>
32 #include <string.h>
33 #include "mutt/lib.h"
34 #include "address/lib.h"
35 #include "config/lib.h"
36 #include "email/lib.h"
37 #include "gui/lib.h"
38 #include "header.h"
39 #include "context.h"
40 #include "mutt_globals.h"
41 #include "options.h"
42 #ifdef USE_AUTOCRYPT
43 #include "autocrypt/lib.h"
44 #endif
45 
51 static const char *const userhdrs_override_headers[] = {
52  "content-type:",
53  "user-agent:",
54 };
55 
60 {
63 };
64 
69 {
71 };
72 
83 static int print_val(FILE *fp, const char *pfx, const char *value,
84  CopyHeaderFlags chflags, size_t col)
85 {
86  while (value && (value[0] != '\0'))
87  {
88  if (fputc(*value, fp) == EOF)
89  return -1;
90  /* corner-case: break words longer than 998 chars by force,
91  * mandated by RFC5322 */
92  if (!(chflags & CH_DISPLAY) && (++col >= 998))
93  {
94  if (fputs("\n ", fp) < 0)
95  return -1;
96  col = 1;
97  }
98  if (*value == '\n')
99  {
100  if ((value[1] != '\0') && pfx && (pfx[0] != '\0') && (fputs(pfx, fp) == EOF))
101  return -1;
102  /* for display, turn folding spaces into folding tabs */
103  if ((chflags & CH_DISPLAY) && ((value[1] == ' ') || (value[1] == '\t')))
104  {
105  value++;
106  while ((value[0] != '\0') && ((value[0] == ' ') || (value[0] == '\t')))
107  value++;
108  if (fputc('\t', fp) == EOF)
109  return -1;
110  continue;
111  }
112  }
113  value++;
114  }
115  return 0;
116 }
117 
130 static int fold_one_header(FILE *fp, const char *tag, const char *value, size_t vlen,
131  const char *pfx, int wraplen, CopyHeaderFlags chflags)
132 {
133  if (!value || (*value == '\0') || !vlen)
134  return 0;
135 
136  const char *p = value;
137  char buf[8192] = { 0 };
138  int first = 1, col = 0, l = 0;
139  const bool display = (chflags & CH_DISPLAY);
140 
141  mutt_debug(LL_DEBUG5, "pfx=[%s], tag=[%s], flags=%d value=[%.*s]\n", pfx, tag,
142  chflags, ((value[vlen - 1] == '\n') ? vlen - 1 : vlen), value);
143 
144  if (tag && *tag && (fprintf(fp, "%s%s: ", NONULL(pfx), tag) < 0))
145  return -1;
146  col = mutt_str_len(tag) + ((tag && (tag[0] != '\0')) ? 2 : 0) + mutt_str_len(pfx);
147 
148  while (p && (p[0] != '\0'))
149  {
150  int fold = 0;
151 
152  /* find the next word and place it in 'buf'. it may start with
153  * whitespace we can fold before */
154  const char *next = mutt_str_find_word(p);
155  l = MIN(sizeof(buf) - 1, next - p);
156  memcpy(buf, p, l);
157  buf[l] = '\0';
158 
159  /* determine width: character cells for display, bytes for sending
160  * (we get pure ascii only) */
161  const int w = mutt_mb_width(buf, col, display);
162  const int enc = mutt_str_startswith(buf, "=?");
163 
164  mutt_debug(LL_DEBUG5, "word=[%s], col=%d, w=%d, next=[0x0%x]\n",
165  (buf[0] == '\n' ? "\\n" : buf), col, w, *next);
166 
167  /* insert a folding \n before the current word's lwsp except for
168  * header name, first word on a line (word longer than wrap width)
169  * and encoded words */
170  if (!first && !enc && col && ((col + w) >= wraplen))
171  {
172  col = mutt_str_len(pfx);
173  fold = 1;
174  if (fprintf(fp, "\n%s", NONULL(pfx)) <= 0)
175  return -1;
176  }
177 
178  /* print the actual word; for display, ignore leading ws for word
179  * and fold with tab for readability */
180  if (display && fold)
181  {
182  char *pc = buf;
183  while ((pc[0] != '\0') && ((pc[0] == ' ') || (pc[0] == '\t')))
184  {
185  pc++;
186  col--;
187  }
188  if (fputc('\t', fp) == EOF)
189  return -1;
190  if (print_val(fp, pfx, pc, chflags, col) < 0)
191  return -1;
192  col += 8;
193  }
194  else if (print_val(fp, pfx, buf, chflags, col) < 0)
195  return -1;
196  col += w;
197 
198  /* if the current word ends in \n, ignore all its trailing spaces
199  * and reset column; this prevents us from putting only spaces (or
200  * even none) on a line if the trailing spaces are located at our
201  * current line width
202  * XXX this covers ASCII space only, for display we probably
203  * want something like iswspace() here */
204  const char *sp = next;
205  while ((sp[0] != '\0') && ((sp[0] == ' ') || (sp[0] == '\t')))
206  sp++;
207  if (sp[0] == '\n')
208  {
209  if (sp[1] == '\0')
210  break;
211  next = sp;
212  col = 0;
213  }
214 
215  p = next;
216  first = 0;
217  }
218 
219  /* if we have printed something but didn't \n-terminate it, do it
220  * except the last word we printed ended in \n already */
221  if (col && ((l == 0) || (buf[l - 1] != '\n')))
222  if (putc('\n', fp) == EOF)
223  return -1;
224 
225  return 0;
226 }
227 
235 static char *unfold_header(char *s)
236 {
237  char *p = s;
238  char *q = s;
239 
240  while (p && (p[0] != '\0'))
241  {
242  /* remove CRLF prior to FWSP, turn \t into ' ' */
243  if ((p[0] == '\r') && (p[1] == '\n') && ((p[2] == ' ') || (p[2] == '\t')))
244  {
245  *q++ = ' ';
246  p += 3;
247  continue;
248  }
249  /* remove LF prior to FWSP, turn \t into ' ' */
250  else if ((p[0] == '\n') && ((p[1] == ' ') || (p[1] == '\t')))
251  {
252  *q++ = ' ';
253  p += 2;
254  continue;
255  }
256  *q++ = *p++;
257  }
258  if (q)
259  q[0] = '\0';
260 
261  return s;
262 }
263 
272 static int userhdrs_override_cmp(const void *a, const void *b)
273 {
274  const char *ca = a;
275  const char *cb = *(const char **) b;
276  return mutt_istrn_cmp(ca, cb, strlen(cb));
277 }
278 
292 static int write_one_header(FILE *fp, int pfxw, int max, int wraplen, const char *pfx,
293  const char *start, const char *end, CopyHeaderFlags chflags)
294 {
295  const char *t = strchr(start, ':');
296  if (!t || (t > end))
297  {
298  mutt_debug(LL_DEBUG1, "#2 warning: header not in 'key: value' format!\n");
299  return 0;
300  }
301 
302  const size_t vallen = end - start;
303  const bool short_enough = (pfxw + max <= wraplen);
304 
305  mutt_debug((short_enough ? LL_DEBUG2 : LL_DEBUG5), "buf[%s%.*s] %s, max width = %d %s %d\n",
306  NONULL(pfx), vallen - 1 /* skip newline */, start,
307  (short_enough ? "short enough" : "too long"), max,
308  (short_enough ? "<=" : ">"), wraplen);
309 
310  int rc = 0;
311  const char *valbuf = NULL, *tagbuf = NULL;
312  const bool is_from = (vallen > 5) && mutt_istr_startswith(start, "from ");
313 
314  /* only pass through folding machinery if necessary for sending,
315  * never wrap From_ headers on sending */
316  if (!(chflags & CH_DISPLAY) && (short_enough || is_from))
317  {
318  if (pfx && *pfx)
319  {
320  if (fputs(pfx, fp) == EOF)
321  {
322  return -1;
323  }
324  }
325 
326  valbuf = mutt_strn_dup(start, end - start);
327  rc = print_val(fp, pfx, valbuf, chflags, mutt_str_len(pfx));
328  }
329  else
330  {
331  if (!is_from)
332  {
333  tagbuf = mutt_strn_dup(start, t - start);
334  /* skip over the colon separating the header field name and value */
335  t++;
336 
337  /* skip over any leading whitespace (WSP, as defined in RFC5322)
338  * NOTE: mutt_str_skip_email_wsp() does the wrong thing here.
339  * See tickets 3609 and 3716. */
340  while ((*t == ' ') || (*t == '\t'))
341  t++;
342  }
343  const char *s = is_from ? start : t;
344  valbuf = mutt_strn_dup(s, end - s);
345  rc = fold_one_header(fp, tagbuf, valbuf, end - s, pfx, wraplen, chflags);
346  }
347 
348  FREE(&tagbuf);
349  FREE(&valbuf);
350  return rc;
351 }
352 
361 static struct UserHdrsOverride write_userhdrs(FILE *fp, const struct ListHead *userhdrs,
362  bool privacy, struct ConfigSubset *sub)
363 {
364  struct UserHdrsOverride overrides = { { 0 } };
365 
366  struct ListNode *tmp = NULL;
367  STAILQ_FOREACH(tmp, userhdrs, entries)
368  {
369  char *const colon = strchr(tmp->data, ':');
370  if (!colon)
371  {
372  continue;
373  }
374 
375  const char *const value = mutt_str_skip_email_wsp(colon + 1);
376  if (*value == '\0')
377  {
378  continue; /* don't emit empty fields. */
379  }
380 
381  /* check whether the current user-header is an override */
382  size_t curr_override = (size_t) -1;
383  const char *const *idx = bsearch(tmp->data, userhdrs_override_headers,
385  sizeof(char *), userhdrs_override_cmp);
386  if (idx != NULL)
387  {
388  curr_override = idx - userhdrs_override_headers;
389  overrides.is_overridden[curr_override] = true;
390  }
391 
392  if (privacy && (curr_override == USERHDRS_OVERRIDE_USER_AGENT))
393  {
394  continue;
395  }
396 
397  *colon = '\0';
398  mutt_write_one_header(fp, tmp->data, value, NULL, 0, CH_NO_FLAGS, sub);
399  *colon = ':';
400  }
401 
402  return overrides;
403 }
404 
420 int mutt_write_one_header(FILE *fp, const char *tag, const char *value,
421  const char *pfx, int wraplen, CopyHeaderFlags chflags,
422  struct ConfigSubset *sub)
423 {
424  char *last = NULL, *line = NULL;
425  int max = 0, w, rc = -1;
426  int pfxw = mutt_strwidth(pfx);
427  char *v = mutt_str_dup(value);
428  bool display = (chflags & CH_DISPLAY);
429 
430  const bool c_weed = cs_subset_bool(sub, "weed");
431  if (!display || c_weed)
432  v = unfold_header(v);
433 
434  /* when not displaying, use sane wrap value */
435  if (!display)
436  {
437  const short c_wrap_headers = cs_subset_number(sub, "wrap_headers");
438  if ((c_wrap_headers < 78) || (c_wrap_headers > 998))
439  wraplen = 78;
440  else
441  wraplen = c_wrap_headers;
442  }
443  else if (wraplen <= 0)
444  wraplen = 78;
445 
446  const size_t vlen = mutt_str_len(v);
447  if (tag)
448  {
449  /* if header is short enough, simply print it */
450  if (!display && (mutt_strwidth(tag) + 2 + pfxw + mutt_strnwidth(v, vlen) <= wraplen))
451  {
452  mutt_debug(LL_DEBUG5, "buf[%s%s: %s] is short enough\n", NONULL(pfx), tag, v);
453  if (fprintf(fp, "%s%s: %s\n", NONULL(pfx), tag, v) <= 0)
454  goto out;
455  rc = 0;
456  goto out;
457  }
458  else
459  {
460  rc = fold_one_header(fp, tag, v, vlen, pfx, wraplen, chflags);
461  goto out;
462  }
463  }
464 
465  char *p = v;
466  last = v;
467  line = v;
468  while (p && *p)
469  {
470  p = strchr(p, '\n');
471 
472  /* find maximum line width in current header */
473  if (p)
474  *p = '\0';
475  w = mutt_mb_width(line, 0, display);
476  if (w > max)
477  max = w;
478  if (p)
479  *p = '\n';
480 
481  if (!p)
482  break;
483 
484  line = ++p;
485  if ((*p != ' ') && (*p != '\t'))
486  {
487  if (write_one_header(fp, pfxw, max, wraplen, pfx, last, p, chflags) < 0)
488  goto out;
489  last = p;
490  max = 0;
491  }
492  }
493 
494  if (last && *last)
495  if (write_one_header(fp, pfxw, max, wraplen, pfx, last, p, chflags) < 0)
496  goto out;
497 
498  rc = 0;
499 
500 out:
501  FREE(&v);
502  return rc;
503 }
504 
515 void mutt_write_references(const struct ListHead *r, FILE *fp, size_t trim,
516  struct ConfigSubset *sub)
517 {
518  struct ListNode *np = NULL;
519  size_t length = 0;
520 
521  STAILQ_FOREACH(np, r, entries)
522  {
523  if (++length == trim)
524  break;
525  }
526 
527  struct ListNode **ref = mutt_mem_calloc(length, sizeof(struct ListNode *));
528 
529  // store in reverse order
530  size_t tmp = length;
531  STAILQ_FOREACH(np, r, entries)
532  {
533  ref[--tmp] = np;
534  if (tmp == 0)
535  break;
536  }
537 
538  for (size_t i = 0; i < length; i++)
539  {
540  fputc(' ', fp);
541  fputs(ref[i]->data, fp);
542  if (i != length - 1)
543  fputc('\n', fp);
544  }
545 
546  FREE(&ref);
547 }
548 
574 int mutt_rfc822_write_header(FILE *fp, struct Envelope *env, struct Body *attach,
575  enum MuttWriteHeaderMode mode, bool privacy,
576  bool hide_protected_subject, struct ConfigSubset *sub)
577 {
578  char buf[1024];
579 
580  if (((mode == MUTT_WRITE_HEADER_NORMAL) || (mode == MUTT_WRITE_HEADER_FCC) ||
581  (mode == MUTT_WRITE_HEADER_POSTPONE)) &&
582  !privacy)
583  {
584  struct Buffer *date = mutt_buffer_pool_get();
585  mutt_date_make_date(date, cs_subset_bool(sub, "local_date_header"));
586  fprintf(fp, "Date: %s\n", mutt_buffer_string(date));
588  }
589 
590  /* UseFrom is not consulted here so that we can still write a From:
591  * field if the user sets it with the 'my_hdr' command */
592  if (!TAILQ_EMPTY(&env->from) && !privacy)
593  {
594  buf[0] = '\0';
595  mutt_addrlist_write(&env->from, buf, sizeof(buf), false);
596  fprintf(fp, "From: %s\n", buf);
597  }
598 
599  if (!TAILQ_EMPTY(&env->sender) && !privacy)
600  {
601  buf[0] = '\0';
602  mutt_addrlist_write(&env->sender, buf, sizeof(buf), false);
603  fprintf(fp, "Sender: %s\n", buf);
604  }
605 
606  if (!TAILQ_EMPTY(&env->to))
607  {
608  fputs("To: ", fp);
609  mutt_addrlist_write_file(&env->to, fp, 4, false);
610  }
611  else if (mode == MUTT_WRITE_HEADER_EDITHDRS)
612 #ifdef USE_NNTP
613  if (!OptNewsSend)
614 #endif
615  fputs("To:\n", fp);
616 
617  if (!TAILQ_EMPTY(&env->cc))
618  {
619  fputs("Cc: ", fp);
620  mutt_addrlist_write_file(&env->cc, fp, 4, false);
621  }
622  else if (mode == MUTT_WRITE_HEADER_EDITHDRS)
623 #ifdef USE_NNTP
624  if (!OptNewsSend)
625 #endif
626  fputs("Cc:\n", fp);
627 
628  if (!TAILQ_EMPTY(&env->bcc))
629  {
630  const bool c_write_bcc = cs_subset_bool(sub, "write_bcc");
631 
632  if ((mode == MUTT_WRITE_HEADER_POSTPONE) ||
633  (mode == MUTT_WRITE_HEADER_EDITHDRS) || (mode == MUTT_WRITE_HEADER_FCC) ||
634  ((mode == MUTT_WRITE_HEADER_NORMAL) && c_write_bcc))
635  {
636  fputs("Bcc: ", fp);
637  mutt_addrlist_write_file(&env->bcc, fp, 5, false);
638  }
639  }
640  else if (mode == MUTT_WRITE_HEADER_EDITHDRS)
641 #ifdef USE_NNTP
642  if (!OptNewsSend)
643 #endif
644  fputs("Bcc:\n", fp);
645 
646 #ifdef USE_NNTP
647  if (env->newsgroups)
648  fprintf(fp, "Newsgroups: %s\n", env->newsgroups);
649  else if ((mode == MUTT_WRITE_HEADER_EDITHDRS) && OptNewsSend)
650  fputs("Newsgroups:\n", fp);
651 
652  if (env->followup_to)
653  fprintf(fp, "Followup-To: %s\n", env->followup_to);
654  else if ((mode == MUTT_WRITE_HEADER_EDITHDRS) && OptNewsSend)
655  fputs("Followup-To:\n", fp);
656 
657  const bool c_x_comment_to = cs_subset_bool(sub, "x_comment_to");
658  if (env->x_comment_to)
659  fprintf(fp, "X-Comment-To: %s\n", env->x_comment_to);
660  else if ((mode == MUTT_WRITE_HEADER_EDITHDRS) && OptNewsSend && c_x_comment_to)
661  fputs("X-Comment-To:\n", fp);
662 #endif
663 
664  if (env->subject)
665  {
666  if (hide_protected_subject &&
667  ((mode == MUTT_WRITE_HEADER_NORMAL) || (mode == MUTT_WRITE_HEADER_FCC) ||
668  (mode == MUTT_WRITE_HEADER_POSTPONE)))
669  {
670  const char *const c_crypt_protected_headers_subject =
671  cs_subset_string(sub, "crypt_protected_headers_subject");
672  mutt_write_one_header(fp, "Subject", c_crypt_protected_headers_subject,
673  NULL, 0, CH_NO_FLAGS, sub);
674  }
675  else
676  mutt_write_one_header(fp, "Subject", env->subject, NULL, 0, CH_NO_FLAGS, sub);
677  }
678  else if (mode == MUTT_WRITE_HEADER_EDITHDRS)
679  fputs("Subject:\n", fp);
680 
681  /* save message id if the user has set it */
682  if (env->message_id && !privacy)
683  fprintf(fp, "Message-ID: %s\n", env->message_id);
684 
685  if (!TAILQ_EMPTY(&env->reply_to))
686  {
687  fputs("Reply-To: ", fp);
688  mutt_addrlist_write_file(&env->reply_to, fp, 10, false);
689  }
690  else if (mode == MUTT_WRITE_HEADER_EDITHDRS)
691  fputs("Reply-To:\n", fp);
692 
693  if (!TAILQ_EMPTY(&env->mail_followup_to))
694  {
695 #ifdef USE_NNTP
696  if (!OptNewsSend)
697 #endif
698  {
699  fputs("Mail-Followup-To: ", fp);
700  mutt_addrlist_write_file(&env->mail_followup_to, fp, 18, false);
701  }
702  }
703 
704  /* Add any user defined headers */
705  struct UserHdrsOverride userhdrs_overrides =
706  write_userhdrs(fp, &env->userhdrs, privacy, sub);
707 
708  if ((mode == MUTT_WRITE_HEADER_NORMAL) || (mode == MUTT_WRITE_HEADER_FCC) ||
709  (mode == MUTT_WRITE_HEADER_POSTPONE) || (mode == MUTT_WRITE_HEADER_MIME))
710  {
711  if (!STAILQ_EMPTY(&env->references))
712  {
713  fputs("References:", fp);
714  mutt_write_references(&env->references, fp, 10, sub);
715  fputc('\n', fp);
716  }
717 
718  /* Add the MIME headers */
719  if (!userhdrs_overrides.is_overridden[USERHDRS_OVERRIDE_CONTENT_TYPE])
720  {
721  fputs("MIME-Version: 1.0\n", fp);
722  mutt_write_mime_header(attach, fp, sub);
723  }
724  }
725 
726  if (!STAILQ_EMPTY(&env->in_reply_to))
727  {
728  fputs("In-Reply-To:", fp);
729  mutt_write_references(&env->in_reply_to, fp, 0, sub);
730  fputc('\n', fp);
731  }
732 
733 #ifdef USE_AUTOCRYPT
734  const bool c_autocrypt = cs_subset_bool(sub, "autocrypt");
735  if (c_autocrypt)
736  {
737  struct Mailbox *m = ctx_mailbox(Context);
738  if (mode == MUTT_WRITE_HEADER_NORMAL || mode == MUTT_WRITE_HEADER_FCC)
740  if (mode == MUTT_WRITE_HEADER_MIME)
742  }
743 #endif
744 
745  const bool c_user_agent = cs_subset_bool(sub, "user_agent");
746  if (((mode == MUTT_WRITE_HEADER_NORMAL) || (mode == MUTT_WRITE_HEADER_FCC)) && !privacy &&
747  c_user_agent && !userhdrs_overrides.is_overridden[USERHDRS_OVERRIDE_USER_AGENT])
748  {
749  /* Add a vanity header */
750  fprintf(fp, "User-Agent: NeoMutt/%s%s\n", PACKAGE_VERSION, GitVer);
751  }
752 
753  return (ferror(fp) == 0) ? 0 : -1;
754 }
755 
764 int mutt_write_mime_header(struct Body *a, FILE *fp, struct ConfigSubset *sub)
765 {
766  if (!a || !fp)
767  return -1;
768 
769  int len;
770  int tmplen;
771  char buf[256] = { 0 };
772 
773  fprintf(fp, "Content-Type: %s/%s", TYPE(a), a->subtype);
774 
775  if (!TAILQ_EMPTY(&a->parameter))
776  {
777  len = 25 + mutt_str_len(a->subtype); /* approximate len. of content-type */
778 
779  struct Parameter *np = NULL;
780  TAILQ_FOREACH(np, &a->parameter, entries)
781  {
782  if (!np->attribute || !np->value)
783  continue;
784 
785  struct ParameterList pl_conts = TAILQ_HEAD_INITIALIZER(pl_conts);
786  rfc2231_encode_string(&pl_conts, np->attribute, np->value);
787  struct Parameter *cont = NULL;
788  TAILQ_FOREACH(cont, &pl_conts, entries)
789  {
790  fputc(';', fp);
791 
792  buf[0] = 0;
793  mutt_addr_cat(buf, sizeof(buf), cont->value, MimeSpecials);
794 
795  /* Dirty hack to make messages readable by Outlook Express
796  * for the Mac: force quotes around the boundary parameter
797  * even when they aren't needed. */
798  if (mutt_istr_equal(cont->attribute, "boundary") && mutt_str_equal(buf, cont->value))
799  snprintf(buf, sizeof(buf), "\"%s\"", cont->value);
800 
801  tmplen = mutt_str_len(buf) + mutt_str_len(cont->attribute) + 1;
802  if (len + tmplen + 2 > 76)
803  {
804  fputs("\n\t", fp);
805  len = tmplen + 1;
806  }
807  else
808  {
809  fputc(' ', fp);
810  len += tmplen + 1;
811  }
812 
813  fprintf(fp, "%s=%s", cont->attribute, buf);
814  }
815 
816  mutt_param_free(&pl_conts);
817  }
818  }
819 
820  fputc('\n', fp);
821 
822  if (a->language)
823  fprintf(fp, "Content-Language: %s\n", a->language);
824 
825  if (a->description)
826  fprintf(fp, "Content-Description: %s\n", a->description);
827 
828  if (a->disposition != DISP_NONE)
829  {
830  const char *dispstr[] = { "inline", "attachment", "form-data" };
831 
832  if (a->disposition < sizeof(dispstr) / sizeof(char *))
833  {
834  fprintf(fp, "Content-Disposition: %s", dispstr[a->disposition]);
835  len = 21 + mutt_str_len(dispstr[a->disposition]);
836 
837  if (a->use_disp && (a->disposition != DISP_INLINE))
838  {
839  char *fn = a->d_filename;
840  if (!fn)
841  fn = a->filename;
842 
843  if (fn)
844  {
845  /* Strip off the leading path... */
846  char *t = strrchr(fn, '/');
847  if (t)
848  t++;
849  else
850  t = fn;
851 
852  struct ParameterList pl_conts = TAILQ_HEAD_INITIALIZER(pl_conts);
853  rfc2231_encode_string(&pl_conts, "filename", t);
854  struct Parameter *cont = NULL;
855  TAILQ_FOREACH(cont, &pl_conts, entries)
856  {
857  fputc(';', fp);
858  buf[0] = 0;
859  mutt_addr_cat(buf, sizeof(buf), cont->value, MimeSpecials);
860 
861  tmplen = mutt_str_len(buf) + mutt_str_len(cont->attribute) + 1;
862  if (len + tmplen + 2 > 76)
863  {
864  fputs("\n\t", fp);
865  len = tmplen + 1;
866  }
867  else
868  {
869  fputc(' ', fp);
870  len += tmplen + 1;
871  }
872 
873  fprintf(fp, "%s=%s", cont->attribute, buf);
874  }
875 
876  mutt_param_free(&pl_conts);
877  }
878  }
879 
880  fputc('\n', fp);
881  }
882  else
883  {
884  mutt_debug(LL_DEBUG1, "ERROR: invalid content-disposition %d\n", a->disposition);
885  }
886  }
887 
888  if (a->encoding != ENC_7BIT)
889  fprintf(fp, "Content-Transfer-Encoding: %s\n", ENCODING(a->encoding));
890 
891  const bool c_crypt_protected_headers_write =
892  cs_subset_bool(sub, "crypt_protected_headers_write");
893  bool autocrypt = false;
894 #ifdef USE_AUTOCRYPT
895  autocrypt = cs_subset_bool(sub, "autocrypt");
896 #endif
897 
898  if ((c_crypt_protected_headers_write || autocrypt) && a->mime_headers)
899  {
901  false, false, sub);
902  }
903 
904  /* Do NOT add the terminator here!!! */
905  return ferror(fp) ? -1 : 0;
906 }
bool mutt_str_equal(const char *a, const char *b)
Compare two strings.
Definition: string.c:904
char * attribute
Parameter name.
Definition: parameter.h:34
Convenience wrapper for the gui headers.
The "current" mailbox.
Definition: context.h:37
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.
Definition: header.c:292
char * filename
when sending a message, this is the file to which this structure refers
Definition: body.h:46
#define NONULL(x)
Definition: string2.h:37
void * mutt_mem_calloc(size_t nmemb, size_t size)
Allocate zeroed memory on the heap.
Definition: memory.c:50
struct Envelope * mime_headers
Memory hole protected headers.
Definition: body.h:63
bool cs_subset_bool(const struct ConfigSubset *sub, const char *name)
Get a boolean config item by name.
Definition: helpers.c:73
static char * unfold_header(char *s)
Unfold a wrapped email header.
Definition: header.c:235
struct Buffer * mutt_buffer_pool_get(void)
Get a Buffer from the pool.
Definition: pool.c:101
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.
Definition: header.c:272
#define MIN(a, b)
Definition: memory.h:31
A postponed Email, just the envelope info.
Definition: header.h:42
struct AddressList mail_followup_to
Email&#39;s &#39;mail-followup-to&#39;.
Definition: envelope.h:63
#define TAILQ_FOREACH(var, head, field)
Definition: queue.h:725
Which headers have been overridden.
Definition: header.c:68
Convenience wrapper for the send headers.
struct Mailbox * ctx_mailbox(struct Context *ctx)
wrapper to get the mailbox in a Context, or NULL
Definition: context.c:444
Structs that make up an email.
The "currently-open" mailbox.
struct AddressList reply_to
Email&#39;s &#39;reply-to&#39;.
Definition: envelope.h:62
Autocrypt end-to-end encryption.
7-bit text
Definition: mime.h:49
struct AddressList bcc
Email&#39;s &#39;Bcc&#39; list.
Definition: envelope.h:60
size_t idx
Definition: mailbox.c:257
void mutt_buffer_pool_release(struct Buffer **pbuf)
Free a Buffer from the pool.
Definition: pool.c:112
String manipulation buffer.
Definition: buffer.h:33
void mutt_date_make_date(struct Buffer *buf, bool local)
Write a date in RFC822 format to a buffer.
Definition: date.c:378
char * mutt_str_dup(const char *str)
Copy a string, safely.
Definition: string.c:370
struct ListHead userhdrs
user defined headers
Definition: envelope.h:83
void mutt_write_references(const struct ListHead *r, FILE *fp, size_t trim, struct ConfigSubset *sub)
Add the message references to a list.
Definition: header.c:515
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.
Definition: header.c:130
short cs_subset_number(const struct ConfigSubset *sub, const char *name)
Get a number config item by name.
Definition: helpers.c:169
int mutt_mb_width(const char *str, int col, bool display)
Measure a string&#39;s display width (in screen columns)
Definition: mbyte.c:138
The body of an email.
Definition: body.h:34
unsigned int disposition
content-disposition, ContentDisposition
Definition: body.h:67
Convenience wrapper for the config headers.
UserHdrsOverrideIdx
Headers that the user may override.
Definition: header.c:59
Email Address Handling.
static const char * mutt_buffer_string(const struct Buffer *buf)
Convert a buffer to a const char * "string".
Definition: buffer.h:77
#define mutt_array_size(x)
Definition: memory.h:33
fcc mode, like normal mode but for Bcc header
Definition: header.h:41
struct ListHead in_reply_to
in-reply-to header content
Definition: envelope.h:82
char * message_id
Message ID.
Definition: envelope.h:69
Log at debug level 2.
Definition: logging.h:41
struct AddressList from
Email&#39;s &#39;From&#39; list.
Definition: envelope.h:57
void mutt_addrlist_write_file(const struct AddressList *al, FILE *fp, int start_col, bool display)
Wrapper for mutt_write_address()
Definition: address.c:1231
char * mutt_strn_dup(const char *begin, size_t len)
Duplicate a sub-string.
Definition: string.c:548
#define ENCODING(x)
Definition: mime.h:92
struct AddressList cc
Email&#39;s &#39;Cc&#39; list.
Definition: envelope.h:59
A normal Email, write full header + MIME headers.
Definition: header.h:40
int mutt_write_mime_header(struct Body *a, FILE *fp, struct ConfigSubset *sub)
Create a MIME header.
Definition: header.c:764
void mutt_param_free(struct ParameterList *pl)
Free a ParameterList.
Definition: parameter.c:61
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.
Definition: header.c:83
static struct UserHdrsOverride write_userhdrs(FILE *fp, const struct ListHead *userhdrs, bool privacy, struct ConfigSubset *sub)
Write user-defined headers and keep track of the interesting ones.
Definition: header.c:361
unsigned int encoding
content-transfer-encoding, ContentEncoding
Definition: body.h:66
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 N...
Definition: header.c:51
int mutt_autocrypt_write_gossip_headers(struct Mailbox *m, struct Envelope *env, FILE *fp)
Write the Autocrypt gossip headers to a file.
Definition: autocrypt.c:818
bool mutt_istr_equal(const char *a, const char *b)
Compare two strings, ignoring case.
Definition: string.c:916
char * subtype
content-type subtype
Definition: body.h:37
int mutt_istrn_cmp(const char *a, const char *b, size_t num)
Compare two strings ignoring case (to a maximum), safely.
Definition: string.c:607
char * x_comment_to
List of &#39;X-comment-to&#39; fields.
Definition: envelope.h:78
A set of inherited config items.
Definition: subset.h:46
size_t mutt_str_startswith(const char *str, const char *prefix)
Check whether a string starts with a prefix.
Definition: string.c:160
A mailbox.
Definition: mailbox.h:81
struct ConfigSubset * sub
Inherited config items.
Definition: mailbox.h:86
int mutt_strwidth(const char *s)
Measure a string&#39;s width in screen cells.
Definition: curs_lib.c:983
#define CH_NO_FLAGS
No flags are set.
Definition: copy.h:51
const char MimeSpecials[]
Characters that need special treatment in MIME.
Definition: mime.c:67
MuttWriteHeaderMode
Modes for mutt_rfc822_write_header()
Definition: header.h:38
#define CH_DISPLAY
Display result to user.
Definition: copy.h:70
Write protected headers.
Definition: header.h:44
const char * cs_subset_string(const struct ConfigSubset *sub, const char *name)
Get a string config item by name.
Definition: helpers.c:317
char * mutt_str_skip_email_wsp(const char *s)
Skip over whitespace as defined by RFC5322.
Definition: string.c:776
size_t mutt_istr_startswith(const char *str, const char *prefix)
Check whether a string starts with a prefix, ignoring case.
Definition: string.c:172
Override the "User-Agent".
Definition: header.c:62
size_t rfc2231_encode_string(struct ParameterList *head, const char *attribute, char *value)
Encode a string to be suitable for an RFC2231 header.
Definition: rfc2231.c:332
#define STAILQ_FOREACH(var, head, field)
Definition: queue.h:352
char * description
content-description
Definition: body.h:40
#define mutt_debug(LEVEL,...)
Definition: logging.h:85
int mutt_strnwidth(const char *s, size_t n)
Measure a string&#39;s width in screen cells.
Definition: curs_lib.c:996
bool is_overridden[mutt_array_size(userhdrs_override_headers)]
Definition: header.c:70
#define TYPE(body)
Definition: mime.h:89
size_t mutt_str_len(const char *a)
Calculate the length of a string, safely.
Definition: string.c:664
char * data
String.
Definition: list.h:36
char * subject
Email&#39;s subject.
Definition: envelope.h:66
char * value
Parameter value.
Definition: parameter.h:35
Log at debug level 1.
Definition: logging.h:40
char * newsgroups
List of newsgroups.
Definition: envelope.h:75
No preferred disposition.
Definition: mime.h:65
bool use_disp
Content-Disposition uses filename= ?
Definition: body.h:68
int mutt_autocrypt_write_autocrypt_header(struct Mailbox *m, struct Envelope *env, FILE *fp)
Write the Autocrypt header to a file.
Definition: autocrypt.c:779
uint32_t CopyHeaderFlags
Flags for mutt_copy_header(), e.g. CH_UPDATE.
Definition: copy.h:50
char * followup_to
List of &#39;followup-to&#39; fields.
Definition: envelope.h:77
Attribute associated with a MIME part.
Definition: parameter.h:32
#define FREE(x)
Definition: memory.h:40
char * language
content-language (RFC8255)
Definition: body.h:38
#define STAILQ_EMPTY(head)
Definition: queue.h:348
struct AddressList to
Email&#39;s &#39;To&#39; list.
Definition: envelope.h:58
struct AddressList sender
Email&#39;s sender.
Definition: envelope.h:61
bool is_from(const char *s, char *path, size_t pathlen, time_t *tp)
Is a string a &#39;From&#39; header line?
Definition: from.c:48
char * d_filename
filename to be used for the content-disposition header.
Definition: body.h:47
Hundreds of global variables to back the user variables.
Handling of global boolean variables.
#define TAILQ_EMPTY(head)
Definition: queue.h:721
Override the "Content-Type".
Definition: header.c:61
WHERE bool OptNewsSend
(pseudo) used to change behavior when posting
Definition: options.h:45
Log at debug level 5.
Definition: logging.h:44
const char * GitVer
Convenience wrapper for the library headers.
struct ListHead references
message references (in reverse order)
Definition: envelope.h:81
A List node for strings.
Definition: list.h:34
#define TAILQ_HEAD_INITIALIZER(head)
Definition: queue.h:637
Content is inline.
Definition: mime.h:62
struct ParameterList parameter
parameters of the content-type
Definition: body.h:39
size_t mutt_addrlist_write(const struct AddressList *al, char *buf, size_t buflen, bool display)
Write an Address to a buffer.
Definition: address.c:1150
void mutt_addr_cat(char *buf, size_t buflen, const char *value, const char *specials)
Copy a string and wrap it in quotes if it contains special characters.
Definition: address.c:681
const char * mutt_str_find_word(const char *src)
Find the end of a word (non-space)
Definition: string.c:1004
int mutt_rfc822_write_header(FILE *fp, struct Envelope *env, struct Body *attach, enum MuttWriteHeaderMode mode, bool privacy, bool hide_protected_subject, struct ConfigSubset *sub)
Write out one RFC822 header line.
Definition: header.c:574
int mutt_write_one_header(FILE *fp, const char *tag, const char *value, const char *pfx, int wraplen, CopyHeaderFlags chflags, struct ConfigSubset *sub)
Write one header line to a file.
Definition: header.c:420
The header of an Email.
Definition: envelope.h:54
"light" mode (used for edit_hdrs)
Definition: header.h:43