collect.c

   1 /*@ S-nail - a mail user agent derived from Berkeley Mail.
   2  *@ Collect input from standard input, handling ~ escapes.
   3  *
   4  * Copyright (c) 2000-2004 Gunnar Ritter, Freiburg i. Br., Germany.
   5  * Copyright (c) 2012 - 2014 Steffen "Daode" Nurpmeso <sdaoden@users.sf.net>.
   6  */
   7 /*
   8  * Copyright (c) 1980, 1993
   9  *      The Regents of the University of California.  All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgement:
  21  *      This product includes software developed by the University of
  22  *      California, Berkeley and its contributors.
  23  * 4. Neither the name of the University nor the names of its contributors
  24  *    may be used to endorse or promote products derived from this software
  25  *    without specific prior written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  37  * SUCH DAMAGE.
  38  */
  39
  40 #ifndef HAVE_AMALGAMATION
  41 # include "nail.h"
  42 #endif
  43
  44 /*
  45  * The following hokiness with global variables is so that on
  46  * receipt of an interrupt signal, the partial message can be salted
  47  * away on dead.letter.
  48  */
  49
  50 static sighandler_type  _coll_saveint;  /* Previous SIGINT value */
  51 static sighandler_type  _coll_savehup;  /* Previous SIGHUP value */
  52 static sighandler_type  _coll_savetstp; /* Previous SIGTSTP value */
  53 static sighandler_type  _coll_savettou; /* Previous SIGTTOU value */
  54 static sighandler_type  _coll_savettin; /* Previous SIGTTIN value */
  55 static FILE             *_coll_fp;      /* File for saving away */
  56 static int volatile     _coll_hadintr;  /* Have seen one SIGINT so far */
  57 static sigjmp_buf       _coll_jmp;      /* To get back to work */
  58 static int              _coll_jmp_p;    /* whether to long jump */
  59 static sigjmp_buf       _coll_abort;    /* To end collection with error */
  60 static sigjmp_buf       _coll_pipejmp;  /* On broken pipe */
  61
  62 /* Handle `~:', `~_' */
  63 static void     _execute_command(struct header *hp, char *linebuf,
  64                         size_t linesize);
  65
  66 /* If *interactive* is set and *doecho* is, too, also dump to *stdout* */
  67 static int      _include_file(FILE *fbuf, char const *name, int *linecount,
  68                         int *charcount, bool_t doecho);
  69
  70 static void _collect_onpipe(int signo);
  71 static void insertcommand(FILE *fp, char const *cmd);
  72 static void print_collf(FILE *collf, struct header *hp);
  73 static int exwrite(char const *name, FILE *fp, int f);
  74 static enum okay makeheader(FILE *fp, struct header *hp);
  75 static void mesedit(int c, struct header *hp);
  76 static void mespipe(char *cmd);
  77 static int forward(char *ms, FILE *fp, int f);
  78 static void collstop(int s);
  79 static void collint(int s);
  80 static void collhup(int s);
  81 static int putesc(const char *s, FILE *stream);
  82
  83 static void
  84 _execute_command(struct header *hp, char *linebuf, size_t linesize)
  85 {
  86         /* The problem arises if there are rfc822 message attachments and the
  87          * user uses `~:' to change the current file.  TODO Unfortunately we
  88          * TODO cannot simply keep a pointer to, or increment a reference count
  89          * TODO of the current `file' (mailbox that is) object, because the
  90          * TODO codebase doesn't deal with that at all; so, until some far
  91          * TODO later time, copy the name of the path, and warn the user if it
  92          * TODO changed; we COULD use the AC_TMPFILE attachment type, i.e.,
  93          * TODO copy the message attachments over to temporary files, but that
  94          * TODO would require more changes so that the user still can recognize
  95          * TODO in `~@' etc. that its a rfc822 message attachment; see below */
  96         char *mnbuf = NULL;
  97         size_t mnlen = 0 /* silence CC */;
  98         struct attachment *ap;
  99
 100         /* If the above todo is worked, remove or outsource to attachments.c! */
 101         if ((ap = hp->h_attach) != NULL) do
 102                 if (ap->a_msgno) {
 103                         mnlen = strlen(mailname) + 1;
 104                         mnbuf = ac_alloc(mnlen);
 105                         memcpy(mnbuf, mailname, mnlen);
 106                         break;
 107                 }
 108         while ((ap = ap->a_flink) != NULL);
 109
 110         inhook = 0;
 111         execute(linebuf, TRU1, linesize);
 112
 113         if (mnbuf != NULL) {
 114                 if (strncmp(mnbuf, mailname, mnlen))
 115                         fputs(tr(237, "Mailbox changed: it seems existing "
 116                                 "rfc822 attachments became invalid!\n"),
 117                                 stderr);
 118                 ac_free(mnbuf);
 119         }
 120 }
 121
 122 static int
 123 _include_file(FILE *fbuf, char const *name, int *linecount, int *charcount,
 124         bool_t doecho)
 125 {
 126         int ret = -1;
 127         char *linebuf = NULL;
 128         size_t linesize = 0, linelen, cnt;
 129
 130         if (fbuf == NULL) {
 131                 if ((fbuf = Fopen(name, "r")) == NULL) {
 132                         perror(name);
 133                         goto jleave;
 134                 }
 135         } else
 136                 fflush_rewind(fbuf);
 137
 138         *linecount = *charcount = 0;
 139         cnt = fsize(fbuf);
 140         while (fgetline(&linebuf, &linesize, &cnt, &linelen, fbuf, 0)
 141                         != NULL) {
 142                 if (fwrite(linebuf, sizeof *linebuf, linelen, _coll_fp)
 143                                 != linelen)
 144                         goto jleave;
 145                 if ((options & OPT_INTERACTIVE) && doecho)
 146                         fwrite(linebuf, sizeof *linebuf, linelen, stdout);
 147                 ++(*linecount);
 148                 (*charcount) += linelen;
 149         }
 150         if (fflush(_coll_fp))
 151                 goto jleave;
 152
 153         ret = 0;
 154 jleave:
 155         if (linebuf != NULL)
 156                 free(linebuf);
 157         if (fbuf != NULL)
 158                 Fclose(fbuf);
 159         return (ret);
 160 }
 161
 162 /*ARGSUSED*/
 163 static void
 164 _collect_onpipe(int signo)
 165 {
 166         UNUSED(signo);
 167         siglongjmp(_coll_pipejmp, 1);
 168 }
 169
 170 /*
 171  * Execute cmd and insert its standard output into fp.
 172  */
 173 static void
 174 insertcommand(FILE *fp, char const *cmd)
 175 {
 176         FILE *ibuf = NULL;
 177         char const *cp;
 178         int c;
 179
 180         cp = ok_vlook(SHELL);
 181         if (cp == NULL)
 182                 cp = XSHELL;
 183         if ((ibuf = Popen(cmd, "r", cp, 0)) != NULL) {
 184                 while ((c = getc(ibuf)) != EOF) /* XXX bytewise, yuck! */
 185                         putc(c, fp);
 186                 Pclose(ibuf, TRU1);
 187         } else
 188                 perror(cmd);
 189 }
 190
 191 /*
 192  * ~p command.
 193  */
 194 static void
 195 print_collf(FILE *cf, struct header *hp)
 196 {
 197         char *lbuf = NULL;
 198         FILE *volatile obuf = stdout;
 199         struct attachment *ap;
 200         char const *cp;
 201         enum gfield gf;
 202         size_t linecnt, maxlines, linesize = 0, linelen, cnt, cnt2;
 203
 204         fflush(cf);
 205         rewind(cf);
 206         cnt = cnt2 = fsize(cf);
 207
 208         if (IS_TTY_SESSION() && (cp = ok_vlook(crt)) != NULL) {
 209                 for (linecnt = 0;
 210                         fgetline(&lbuf, &linesize, &cnt2, NULL, cf, 0);
 211                         linecnt++);
 212                 rewind(cf);
 213                 maxlines = (*cp == '\0' ? screensize() : atoi(cp));
 214                 maxlines -= 4;
 215                 if (hp->h_to)
 216                         maxlines--;
 217                 if (hp->h_subject)
 218                         maxlines--;
 219                 if (hp->h_cc)
 220                         maxlines--;
 221                 if (hp->h_bcc)
 222                         maxlines--;
 223                 if (hp->h_attach)
 224                         maxlines--;
 225                 maxlines -= myaddrs(hp) != NULL || hp->h_from != NULL;
 226                 maxlines -= ok_vlook(ORGANIZATION) != NULL ||
 227                         hp->h_organization != NULL;
 228                 maxlines -= ok_vlook(replyto) != NULL || hp->h_replyto != NULL;
 229                 maxlines -= ok_vlook(sender) != NULL || hp->h_sender != NULL;
 230                 if ((long)maxlines < 0 || linecnt > maxlines) {
 231                         cp = get_pager();
 232                         if (sigsetjmp(_coll_pipejmp, 1))
 233                                 goto endpipe;
 234                         obuf = Popen(cp, "w", NULL, 1);
 235                         if (obuf == NULL) {
 236                                 perror(cp);
 237                                 obuf = stdout;
 238                         } else
 239                                 safe_signal(SIGPIPE, &_collect_onpipe);
 240                 }
 241         }
 242
 243         fprintf(obuf, tr(62, "-------\nMessage contains:\n"));
 244         gf = GIDENT|GTO|GSUBJECT|GCC|GBCC|GNL|GFILES;
 245         if (ok_blook(fullnames))
 246                 gf |= GCOMMA;
 247         puthead(hp, obuf, gf, SEND_TODISP, CONV_NONE, NULL, NULL);
 248         while (fgetline(&lbuf, &linesize, &cnt, &linelen, cf, 1))
 249                 prout(lbuf, linelen, obuf);
 250         if (hp->h_attach != NULL) {
 251                 fputs(tr(63, "-------\nAttachments:\n"), obuf);
 252                 for (ap = hp->h_attach; ap != NULL; ap = ap->a_flink) {
 253                         if (ap->a_msgno)
 254                                 fprintf(obuf, " - message %u\n", ap->a_msgno);
 255                         else {
 256                                 /* TODO after MIME/send layer rewrite we *know*
 257                                  * TODO the details of the attachment here,
 258                                  * TODO so adjust this again, then */
 259                                 char const *cs, *csi = "-> ";
 260
 261                                 if ((cs = ap->a_charset) == NULL &&
 262                                                 (csi = "<- ",
 263                                                 cs = ap->a_input_charset)
 264                                                 == NULL)
 265                                         cs = charset_get_lc();
 266                                 if ((cp = ap->a_content_type) == NULL)
 267                                         cp = "?";
 268                                 else if (ascncasecmp(cp, "text/", 5) != 0)
 269                                         csi = "";
 270
 271                                 fprintf(obuf, " - [%s, %s%s] %s\n",
 272                                         cp, csi, cs, ap->a_name);
 273                         }
 274                 }
 275         }
 276 endpipe:
 277         if (obuf != stdout) {
 278                 safe_signal(SIGPIPE, SIG_IGN);
 279                 Pclose(obuf, TRU1);
 280                 safe_signal(SIGPIPE, dflpipe);
 281         }
 282         if (lbuf)
 283                 free(lbuf);
 284 }
 285
 286 FL FILE *
 287 collect(struct header *hp, int printheaders, struct message *mp,
 288                 char *quotefile, int doprefix)
 289 {
 290         FILE *fbuf;
 291         struct ignoretab *quoteig;
 292         int lc, cc, eofcount, c, t;
 293         int volatile escape, getfields;
 294         char *linebuf = NULL, *quote = NULL, *tempMail = NULL;
 295         char const *cp;
 296         size_t linesize = 0;
 297         long cnt;
 298         enum sendaction action;
 299         sigset_t oset, nset;
 300         sighandler_type savedtop;
 301
 302         _coll_fp = NULL;
 303         /*
 304          * Start catching signals from here, but we're still die on interrupts
 305          * until we're in the main loop.
 306          */
 307         sigemptyset(&nset);
 308         sigaddset(&nset, SIGINT);
 309         sigaddset(&nset, SIGHUP);
 310         sigprocmask(SIG_BLOCK, &nset, &oset);
 311         handlerpush(collint);
 312         if ((_coll_saveint = safe_signal(SIGINT, SIG_IGN)) != SIG_IGN)
 313                 safe_signal(SIGINT, collint);
 314         if ((_coll_savehup = safe_signal(SIGHUP, SIG_IGN)) != SIG_IGN)
 315                 safe_signal(SIGHUP, collhup);
 316         /* TODO We do a lot of redundant signal handling, especially
 317          * TODO with the command line editor(s); try to merge this */
 318         _coll_savetstp = safe_signal(SIGTSTP, collstop);
 319         _coll_savettou = safe_signal(SIGTTOU, collstop);
 320         _coll_savettin = safe_signal(SIGTTIN, collstop);
 321         if (sigsetjmp(_coll_abort, 1))
 322                 goto jerr;
 323         if (sigsetjmp(_coll_jmp, 1))
 324                 goto jerr;
 325         sigprocmask(SIG_SETMASK, &oset, (sigset_t *)NULL);
 326
 327         noreset++;
 328         if ((_coll_fp = Ftemp(&tempMail, "Rs", "w+", 0600, 1)) == NULL) {
 329                 perror(tr(51, "temporary mail file"));
 330                 goto jerr;
 331         }
 332         unlink(tempMail);
 333         Ftfree(&tempMail);
 334
 335         if ((cp = ok_vlook(NAIL_HEAD)) != NULL && putesc(cp, _coll_fp) < 0)
 336                 goto jerr;
 337
 338         /*
 339          * If we are going to prompt for a subject,
 340          * refrain from printing a newline after
 341          * the headers (since some people mind).
 342          */
 343         getfields = 0;
 344         if (! (options & OPT_t_FLAG)) {
 345                 t = GTO|GSUBJECT|GCC|GNL;
 346                 if (ok_blook(fullnames))
 347                         t |= GCOMMA;
 348                 if (hp->h_subject == NULL && (options & OPT_INTERACTIVE) &&
 349                             (ok_blook(ask) || ok_blook(asksub)))
 350                         t &= ~GNL, getfields |= GSUBJECT;
 351                 if (hp->h_to == NULL && (options & OPT_INTERACTIVE))
 352                         t &= ~GNL, getfields |= GTO;
 353                 if (!ok_blook(bsdcompat) && !ok_blook(askatend) &&
 354                                 (options & OPT_INTERACTIVE)) {
 355                         if (hp->h_bcc == NULL && ok_blook(askbcc))
 356                                 t &= ~GNL, getfields |= GBCC;
 357                         if (hp->h_cc == NULL && ok_blook(askcc))
 358                                 t &= ~GNL, getfields |= GCC;
 359                 }
 360                 if (printheaders) {
 361                         (void)puthead(hp, stdout, t, SEND_TODISP, CONV_NONE,
 362                                         NULL, NULL);
 363                         (void)fflush(stdout);
 364                 }
 365         }
 366
 367         /*
 368          * Quote an original message
 369          */
 370         if (mp != NULL && (doprefix || (quote = ok_vlook(quote)) != NULL)) {
 371                 quoteig = allignore;
 372                 action = SEND_QUOTE;
 373                 if (doprefix) {
 374                         quoteig = fwdignore;
 375                         if ((cp = ok_vlook(fwdheading)) == NULL)
 376                                 cp = "-------- Original Message --------";
 377                         if (*cp && fprintf(_coll_fp, "%s\n", cp) < 0)
 378                                 goto jerr;
 379                 } else if (strcmp(quote, "noheading") == 0) {
 380                         /*EMPTY*/;
 381                 } else if (strcmp(quote, "headers") == 0) {
 382                         quoteig = ignore;
 383                 } else if (strcmp(quote, "allheaders") == 0) {
 384                         quoteig = NULL;
 385                         action = SEND_QUOTE_ALL;
 386                 } else {
 387                         cp = hfield1("from", mp);
 388                         if (cp != NULL && (cnt = (long)strlen(cp)) > 0) {
 389                                 if (xmime_write(cp, cnt, _coll_fp,
 390                                                 CONV_FROMHDR, TD_NONE,
 391                                                 NULL) < 0)
 392                                         goto jerr;
 393                                 if (fprintf(_coll_fp,
 394                                                 tr(52, " wrote:\n\n")) < 0)
 395                                         goto jerr;
 396                         }
 397                 }
 398                 if (fflush(_coll_fp))
 399                         goto jerr;
 400                 cp = ok_vlook(indentprefix);
 401                 if (cp != NULL && *cp == '\0')
 402                         cp = "\t";
 403                 if (sendmp(mp, _coll_fp, quoteig, (doprefix ? NULL : cp),
 404                                 action, NULL) < 0)
 405                         goto jerr;
 406         }
 407
 408         /* Print what we have sofar also on the terminal */
 409         rewind(_coll_fp);
 410         while ((c = getc(_coll_fp)) != EOF) /* XXX bytewise, yuck! */
 411                 (void)putc(c, stdout);
 412         if (fseek(_coll_fp, 0, SEEK_END))
 413                 goto jerr;
 414
 415         escape = ((cp = ok_vlook(escape)) != NULL) ? *cp : ESCAPE;
 416         eofcount = 0;
 417         _coll_hadintr = 0;
 418
 419         if (!sigsetjmp(_coll_jmp, 1)) {
 420                 if (getfields)
 421                         grab_headers(hp, getfields, 1);
 422                 if (quotefile != NULL) {
 423                         if (_include_file(NULL, quotefile, &lc, &cc, TRU1) != 0)
 424                                 goto jerr;
 425                 }
 426                 if ((options & OPT_INTERACTIVE) && ok_blook(editalong)) {
 427                         rewind(_coll_fp);
 428                         mesedit('e', hp);
 429                         goto jcont;
 430                 }
 431         } else {
 432                 /*
 433                  * Come here for printing the after-signal message.
 434                  * Duplicate messages won't be printed because
 435                  * the write is aborted if we get a SIGTTOU.
 436                  */
 437 jcont:
 438                 if (_coll_hadintr) {
 439                         (void)fprintf(stderr, tr(53,
 440                                 "\n(Interrupt -- one more to kill letter)\n"));
 441                 } else {
 442                         printf(tr(54, "(continue)\n"));
 443                         (void)fflush(stdout);
 444                 }
 445         }
 446
 447         /*
 448          * No tilde escapes, interrupts not expected.  Simply copy STDIN
 449          */
 450         if (! (options & (OPT_INTERACTIVE | OPT_t_FLAG|OPT_TILDE_FLAG))) {
 451                 linebuf = srealloc(linebuf, linesize = LINESIZE);
 452                 while ((cnt = fread(linebuf, sizeof *linebuf,
 453                                                 linesize, stdin)) > 0) {
 454                         if ((size_t)cnt != fwrite(linebuf, sizeof *linebuf,
 455                                                 cnt, _coll_fp))
 456                                 goto jerr;
 457                 }
 458                 if (fflush(_coll_fp))
 459                         goto jerr;
 460                 goto jout;
 461         }
 462
 463         /*
 464          * The interactive collect loop
 465          */
 466         for (;;) {
 467                 _coll_jmp_p = 1;
 468                 cnt = readline_input(LNED_NONE, "", &linebuf, &linesize);
 469                 _coll_jmp_p = 0;
 470
 471                 if (cnt < 0) {
 472                         if ((options & OPT_INTERACTIVE) &&
 473                             ok_blook(ignoreeof) && ++eofcount < 25) {
 474                                 printf(tr(55,
 475                                         "Use \".\" to terminate letter\n"));
 476                                 continue;
 477                         }
 478                         break;
 479                 }
 480                 if ((options & OPT_t_FLAG) && cnt == 0) {
 481                         rewind(_coll_fp);
 482                         if (makeheader(_coll_fp, hp) != OKAY)
 483                                 goto jerr;
 484                         rewind(_coll_fp);
 485                         options &= ~OPT_t_FLAG;
 486                         continue;
 487                 }
 488
 489                 eofcount = 0;
 490                 _coll_hadintr = 0;
 491                 if (linebuf[0] == '.' && linebuf[1] == '\0' &&
 492                                 (options & (OPT_INTERACTIVE|OPT_TILDE_FLAG)) &&
 493                                 (ok_blook(dot) || ok_blook(ignoreeof)))
 494                         break;
 495                 if (cnt == 0 || linebuf[0] != escape || ! (options &
 496                                 (OPT_INTERACTIVE | OPT_TILDE_FLAG))) {
 497                         /* TODO calls putline(), which *always* appends LF;
 498                          * TODO thus, STDIN with -t will ALWAYS end with LF,
 499                          * TODO even if no trailing LF and QP CTE */
 500                         if (putline(_coll_fp, linebuf, cnt) < 0)
 501                                 goto jerr;
 502                         continue;
 503                 }
 504
 505                 c = linebuf[1];
 506                 switch (c) {
 507                 default:
 508                         /*
 509                          * On double escape, just send the single one.
 510                          * Otherwise, it's an error.
 511                          */
 512                         if (c == escape) {
 513                                 if (putline(_coll_fp, &linebuf[1], cnt - 1) < 0)
 514                                         goto jerr;
 515                                 else
 516                                         break;
 517                         }
 518                         fputs(tr(56, "Unknown tilde escape.\n"), stderr);
 519                         break;
 520                 case '!':
 521                         /* Shell escape, send the balance of line to sh -c */
 522                         shell(&linebuf[2]);
 523                         break;
 524                 case ':':
 525                         /* FALLTHRU */
 526                 case '_':
 527                         /* Escape to command mode, but be nice! */
 528                         _execute_command(hp, linebuf + 2, cnt - 2);
 529                         goto jcont;
 530                 case '.':
 531                         /* Simulate end of file on input */
 532                         goto jout;
 533                 case 'x':
 534                         /* Same as 'q', but no dead.letter saving */
 535                         /* FALLTHRU */
 536                 case 'q':
 537                         /* Force a quit, act like an interrupt had happened */
 538                         ++_coll_hadintr;
 539                         collint((c == 'x') ? 0 : SIGINT);
 540                         exit(1);
 541                         /*NOTREACHED*/
 542                 case 'h':
 543                         /* Grab a bunch of headers */
 544                         do
 545                                 grab_headers(hp, GTO|GSUBJECT|GCC|GBCC,
 546                                                 (ok_blook(bsdcompat) &&
 547                                                 ok_blook(bsdorder)));
 548                         while (hp->h_to == NULL);
 549                         goto jcont;
 550                 case 'H':
 551                         /* Grab extra headers */
 552                         do
 553                                 grab_headers(hp, GEXTRA, 0);
 554                         while (check_from_and_sender(hp->h_from, hp->h_sender));
 555                         goto jcont;
 556                 case 't':
 557                         /* Add to the To list */
 558                         while ((hp->h_to = cat(hp->h_to, checkaddrs(
 559                                         lextract(&linebuf[2], GTO|GFULL))))
 560                                         == NULL)
 561                                 ;
 562                         break;
 563                 case 's':
 564                         /* Set the Subject list */
 565                         cp = &linebuf[2];
 566                         while (whitechar(*cp))
 567                                 ++cp;
 568                         hp->h_subject = savestr(cp);
 569                         break;
 570 #ifdef HAVE_DEBUG
 571                 case 'S':
 572                         c_sstats(NULL);
 573                         break;
 574 #endif
 575                 case '@':
 576                         /* Edit the attachment list */
 577                         if (linebuf[2] != '\0')
 578                                 hp->h_attach = append_attachments(hp->h_attach,
 579                                                 &linebuf[2]);
 580                         else
 581                                 hp->h_attach = edit_attachments(hp->h_attach);
 582                         break;
 583                 case 'c':
 584                         /* Add to the CC list */
 585                         hp->h_cc = cat(hp->h_cc, checkaddrs(
 586                                         lextract(&linebuf[2], GCC|GFULL)));
 587                         break;
 588                 case 'b':
 589                         /* Add stuff to blind carbon copies list */
 590                         hp->h_bcc = cat(hp->h_bcc, checkaddrs(
 591                                         lextract(&linebuf[2], GBCC|GFULL)));
 592                         break;
 593                 case 'd':
 594                         strncpy(linebuf + 2, getdeadletter(), linesize - 2);
 595                         linebuf[linesize-1]='\0';
 596                         /*FALLTHRU*/
 597                 case 'r':
 598                 case '<':
 599                         /*
 600                          * Invoke a file:
 601                          * Search for the file name,
 602                          * then open it and copy the contents to _coll_fp.
 603                          */
 604                         cp = &linebuf[2];
 605                         while (whitechar(*cp))
 606                                 cp++;
 607                         if (*cp == '\0') {
 608                                 fputs(tr(57, "Interpolate what file?\n"),
 609                                         stderr);
 610                                 break;
 611                         }
 612                         if (*cp == '!') {
 613                                 insertcommand(_coll_fp, cp + 1);
 614                                 break;
 615                         }
 616                         if ((cp = file_expand(cp)) == NULL)
 617                                 break;
 618                         if (is_dir(cp)) {
 619                                 fprintf(stderr, tr(58, "%s: Directory\n"), cp);
 620                                 break;
 621                         }
 622                         if ((fbuf = Fopen(cp, "r")) == NULL) {
 623                                 perror(cp);
 624                                 break;
 625                         }
 626                         printf(tr(59, "\"%s\" "), cp);
 627                         fflush(stdout);
 628                         if (_include_file(fbuf, cp, &lc, &cc, FAL0) != 0)
 629                                 goto jerr;
 630                         printf(tr(60, "%d/%d\n"), lc, cc);
 631                         break;
 632                 case 'i':
 633                         /* Insert a variable into the file */
 634                         cp = &linebuf[2];
 635                         while (whitechar(*cp))
 636                                 ++cp;
 637                         if ((cp = vok_vlook(cp)) == NULL || *cp == '\0')
 638                                 break;
 639                         if (putesc(cp, _coll_fp) < 0)
 640                                 goto jerr;
 641                         if ((options & OPT_INTERACTIVE) &&
 642                                         putesc(cp, stdout) < 0)
 643                                 goto jerr;
 644                         break;
 645                 case 'a':
 646                 case 'A':
 647                         /* Insert the contents of a signature variable */
 648                         cp = (c == 'a') ? ok_vlook(sign) : ok_vlook(Sign);
 649                         if (cp != NULL && *cp != '\0') {
 650                                 if (putesc(cp, _coll_fp) < 0)
 651                                         goto jerr;
 652                                 if ((options & OPT_INTERACTIVE) &&
 653                                                 putesc(cp, stdout) < 0)
 654                                         goto jerr;
 655                         }
 656                         break;
 657                 case 'w':
 658                         /* Write the message on a file */
 659                         cp = &linebuf[2];
 660                         while (blankchar(*cp))
 661                                 ++cp;
 662                         if (*cp == '\0' || (cp = file_expand(cp)) == NULL) {
 663                                 fputs(tr(61, "Write what file!?\n"), stderr);
 664                                 break;
 665                         }
 666                         rewind(_coll_fp);
 667                         if (exwrite(cp, _coll_fp, 1) < 0)
 668                                 goto jerr;
 669                         break;
 670                 case 'm':
 671                 case 'M':
 672                 case 'f':
 673                 case 'F':
 674                 case 'u':
 675                 case 'U':
 676                         /*
 677                          * Interpolate the named messages, if we
 678                          * are in receiving mail mode.  Does the
 679                          * standard list processing garbage.
 680                          * If ~f is given, we don't shift over.
 681                          */
 682                         if (forward(linebuf + 2, _coll_fp, c) < 0)
 683                                 goto jerr;
 684                         goto jcont;
 685                 case 'p':
 686                         /*
 687                          * Print out the current state of the
 688                          * message without altering anything.
 689                          */
 690                         print_collf(_coll_fp, hp);
 691                         goto jcont;
 692                 case '|':
 693                         /*
 694                          * Pipe message through command.
 695                          * Collect output as new message.
 696                          */
 697                         rewind(_coll_fp);
 698                         mespipe(&linebuf[2]);
 699                         goto jcont;
 700                 case 'v':
 701                 case 'e':
 702                         /*
 703                          * Edit the current message.
 704                          * 'e' means to use EDITOR
 705                          * 'v' means to use VISUAL
 706                          */
 707                         rewind(_coll_fp);
 708                         mesedit(c, ok_blook(editheaders) ? hp : NULL);
 709                         goto jcont;
 710                 case '?':
 711                         /*
 712                          * Last the lengthy help string.
 713                          * (Very ugly, but take care for compiler supported
 714                          * string lengths :()
 715                          */
 716                         (void)puts(tr(300,
 717 "-------------------- ~ ESCAPES ----------------------------\n"
 718 "~~             Quote a single tilde\n"
 719 "~@ [file ...]  Edit attachment list\n"
 720 "~b users       Add users to \"blind\" cc list\n"
 721 "~c users       Add users to cc list\n"
 722 "~d             Read in dead.letter\n"
 723 "~e             Edit the message buffer\n"
 724 "~f messages    Read in messages without indenting lines\n"
 725 "~F messages    Same as ~f, but keep all header lines\n"
 726 "~h             Prompt for to list, subject, cc, and \"blind\" cc list\n"));
 727                         (void)puts(tr(301,
 728 "~r file        Read a file into the message buffer\n"
 729 "~p             Print the message buffer\n"
 730 "~q             Abort message composition and save text to dead.letter\n"
 731 "~m messages    Read in messages with each line indented\n"
 732 "~M messages    Same as ~m, but keep all header lines\n"
 733 "~s subject     Set subject\n"
 734 "~t users       Add users to to list\n"
 735 "~u messages    Same as ~f, but without any headers\n"
 736 "~U messages    Same as ~m, but without any headers\n"));
 737                         (void)puts(tr(302,
 738 "~v             Invoke display editor on message\n"
 739 "~w file        Write message onto file\n"
 740 "~x             Abort message composition and discard text written so far\n"
 741 "~!command      Invoke the shell\n"
 742 "~:command      Execute a regular command\n"
 743 "-----------------------------------------------------------\n"));
 744                         break;
 745                 }
 746         }
 747
 748 jout:
 749         if (_coll_fp != NULL) {
 750                 if ((cp = ok_vlook(NAIL_TAIL)) != NULL) {
 751                         if (putesc(cp, _coll_fp) < 0)
 752                                 goto jerr;
 753                         if ((options & OPT_INTERACTIVE) &&
 754                                         putesc(cp, stdout) < 0)
 755                                 goto jerr;
 756                 }
 757                 rewind(_coll_fp);
 758         }
 759         if (linebuf != NULL)
 760                 free(linebuf);
 761         handlerpop();
 762         noreset--;
 763         sigemptyset(&nset);
 764         sigaddset(&nset, SIGINT);
 765         sigaddset(&nset, SIGHUP);
 766         sigprocmask(SIG_BLOCK, &nset, (sigset_t*)NULL);
 767         safe_signal(SIGINT, _coll_saveint);
 768         safe_signal(SIGHUP, _coll_savehup);
 769         safe_signal(SIGTSTP, _coll_savetstp);
 770         safe_signal(SIGTTOU, _coll_savettou);
 771         safe_signal(SIGTTIN, _coll_savettin);
 772         sigprocmask(SIG_SETMASK, &oset, (sigset_t*)NULL);
 773         return _coll_fp;
 774
 775 jerr:
 776         if (tempMail != NULL) {
 777                 rm(tempMail);
 778                 Ftfree(&tempMail);
 779         }
 780         if (_coll_fp != NULL) {
 781                 Fclose(_coll_fp);
 782                 _coll_fp = NULL;
 783         }
 784         goto jout;
 785 }
 786
 787 /*
 788  * Write a file, ex-like if f set.
 789  */
 790 static int
 791 exwrite(char const *name, FILE *fp, int f)
 792 {
 793         FILE *of;
 794         int c;
 795         long cc;
 796         int lc;
 797
 798         if (f) {
 799                 printf("\"%s\" ", name);
 800                 fflush(stdout);
 801         }
 802         if ((of = Fopen(name, "a")) == NULL) {
 803                 perror(NULL);
 804                 return(-1);
 805         }
 806         lc = 0;
 807         cc = 0;
 808         while ((c = getc(fp)) != EOF) {
 809                 cc++;
 810                 if (c == '\n')
 811                         lc++;
 812                 putc(c, of);
 813                 if (ferror(of)) {
 814                         perror(name);
 815                         Fclose(of);
 816                         return(-1);
 817                 }
 818         }
 819         Fclose(of);
 820         printf(tr(65, "%d/%ld\n"), lc, cc);
 821         fflush(stdout);
 822         return(0);
 823 }
 824
 825 static enum okay
 826 makeheader(FILE *fp, struct header *hp)
 827 {
 828         char *tempEdit;
 829         FILE *nf;
 830         int c;
 831
 832         if ((nf = Ftemp(&tempEdit, "Re", "w+", 0600, 1)) == NULL) {
 833                 perror(tr(66, "temporary mail edit file"));
 834                 return STOP;
 835         }
 836         unlink(tempEdit);
 837         Ftfree(&tempEdit);
 838
 839         extract_header(fp, hp);
 840         while ((c = getc(fp)) != EOF) /* XXX bytewise, yuck! */
 841                 putc(c, nf);
 842         if (fp != _coll_fp)
 843                 Fclose(_coll_fp);
 844         Fclose(fp);
 845         _coll_fp = nf;
 846         if (check_from_and_sender(hp->h_from, hp->h_sender))
 847                 return STOP;
 848         return OKAY;
 849 }
 850
 851 /*
 852  * Edit the message being collected on fp.
 853  * On return, make the edit file the new temp file.
 854  */
 855 static void
 856 mesedit(int c, struct header *hp)
 857 {
 858         sighandler_type sigint = safe_signal(SIGINT, SIG_IGN);
 859         bool_t saved = ok_blook(add_file_recipients);
 860         FILE *nf;
 861
 862         ok_bset(add_file_recipients, TRU1);
 863         nf = run_editor(_coll_fp, (off_t)-1, c, 0, hp, NULL, SEND_MBOX, sigint);
 864
 865         if (nf != NULL) {
 866                 if (hp) {
 867                         rewind(nf);
 868                         makeheader(nf, hp);
 869                 } else {
 870                         fseek(nf, 0L, SEEK_END);
 871                         Fclose(_coll_fp);
 872                         _coll_fp = nf;
 873                 }
 874         }
 875
 876         ok_bset(add_file_recipients, saved);
 877         safe_signal(SIGINT, sigint);
 878 }
 879
 880 /*
 881  * Pipe the message through the command.
 882  * Old message is on stdin of command;
 883  * New message collected from stdout.
 884  * Sh -c must return 0 to accept the new message.
 885  */
 886 static void
 887 mespipe(char *cmd)
 888 {
 889         FILE *nf;
 890         sighandler_type sigint = safe_signal(SIGINT, SIG_IGN);
 891         char *tempEdit;
 892         char const *sh;
 893
 894         if ((nf = Ftemp(&tempEdit, "Re", "w+", 0600, 1)) == NULL) {
 895                 perror(tr(66, "temporary mail edit file"));
 896                 goto out;
 897         }
 898         fflush(_coll_fp);
 899         unlink(tempEdit);
 900         Ftfree(&tempEdit);
 901         /*
 902          * stdin = current message.
 903          * stdout = new message.
 904          */
 905         if ((sh = ok_vlook(SHELL)) == NULL)
 906                 sh = XSHELL;
 907         if (run_command(sh, 0, fileno(_coll_fp), fileno(nf), "-c", cmd, NULL)
 908                         < 0) {
 909                 Fclose(nf);
 910                 goto out;
 911         }
 912         if (fsize(nf) == 0) {
 913                 fprintf(stderr, tr(67, "No bytes from \"%s\" !?\n"), cmd);
 914                 Fclose(nf);
 915                 goto out;
 916         }
 917         /*
 918          * Take new files.
 919          */
 920         fseek(nf, 0L, SEEK_END);
 921         Fclose(_coll_fp);
 922         _coll_fp = nf;
 923 out:
 924         safe_signal(SIGINT, sigint);
 925 }
 926
 927 /*
 928  * Interpolate the named messages into the current
 929  * message, preceding each line with a tab.
 930  * Return a count of the number of characters now in
 931  * the message, or -1 if an error is encountered writing
 932  * the message temporary.  The flag argument is 'm' if we
 933  * should shift over and 'f' if not.
 934  */
 935 static int
 936 forward(char *ms, FILE *fp, int f)
 937 {
 938         int *msgvec;
 939         struct ignoretab *ig;
 940         char const *tabst;
 941         enum sendaction action;
 942
 943         /*LINTED*/
 944         msgvec = (int *)salloc((msgCount+1) * sizeof *msgvec);
 945         if (msgvec == NULL)
 946                 return(0);
 947         if (getmsglist(ms, msgvec, 0) < 0)
 948                 return(0);
 949         if (*msgvec == 0) {
 950                 *msgvec = first(0, MMNORM);
 951                 if (*msgvec == 0) {
 952                         fputs(tr(68, "No appropriate messages\n"), stderr);
 953                         return 0;
 954                 }
 955                 msgvec[1] = 0;
 956         }
 957
 958         if (f == 'f' || f == 'F' || f == 'u')
 959                 tabst = NULL;
 960         else if ((tabst = ok_vlook(indentprefix)) == NULL)
 961                 tabst = "\t";
 962         if (f == 'u' || f == 'U')
 963                 ig = allignore;
 964         else
 965                 ig = upperchar(f) ? (struct ignoretab*)NULL : ignore;
 966         action = (upperchar(f) && f != 'U') ? SEND_QUOTE_ALL : SEND_QUOTE;
 967
 968         printf(tr(69, "Interpolating:"));
 969         for (; *msgvec != 0; msgvec++) {
 970                 struct message *mp = message + *msgvec - 1;
 971
 972                 touch(mp);
 973                 printf(" %d", *msgvec);
 974                 if (sendmp(mp, fp, ig, tabst, action, NULL) < 0) {
 975                         perror(tr(70, "temporary mail file"));
 976                         return(-1);
 977                 }
 978         }
 979         printf("\n");
 980         return(0);
 981 }
 982
 983 /*
 984  * Print (continue) when continued after ^Z.
 985  */
 986 /*ARGSUSED*/
 987 static void
 988 collstop(int s)
 989 {
 990         sighandler_type old_action = safe_signal(s, SIG_DFL);
 991         sigset_t nset;
 992
 993         sigemptyset(&nset);
 994         sigaddset(&nset, s);
 995         sigprocmask(SIG_UNBLOCK, &nset, (sigset_t *)NULL);
 996         kill(0, s);
 997         sigprocmask(SIG_BLOCK, &nset, (sigset_t *)NULL);
 998         safe_signal(s, old_action);
 999         if (_coll_jmp_p) {
1000                 _coll_jmp_p = 0;
1001                 _coll_hadintr = 0;
1002                 siglongjmp(_coll_jmp, 1);
1003         }
1004 }
1005
1006 /*
1007  * On interrupt, come here to save the partial message in ~/dead.letter.
1008  * Then jump out of the collection loop.
1009  */
1010 /*ARGSUSED*/
1011 static void
1012 collint(int s)
1013 {
1014         /* the control flow is subtle, because we can be called from ~q */
1015         if (_coll_hadintr == 0) {
1016                 if (ok_blook(ignore)) {
1017                         puts("@");
1018                         fflush(stdout);
1019                         clearerr(stdin);
1020                         return;
1021                 }
1022                 _coll_hadintr = 1;
1023                 siglongjmp(_coll_jmp, 1);
1024         }
1025         exit_status |= 04;
1026         if (ok_blook(save) && s != 0)
1027                 savedeadletter(_coll_fp, 1);
1028         /* Aborting message, no need to fflush() .. */
1029         siglongjmp(_coll_abort, 1);
1030 }
1031
1032 /*ARGSUSED*/
1033 static void
1034 collhup(int s)
1035 {
1036         (void)s;
1037         savedeadletter(_coll_fp, 1);
1038         /*
1039          * Let's pretend nobody else wants to clean up,
1040          * a true statement at this time.
1041          */
1042         exit(1);
1043 }
1044
1045 FL void
1046 savedeadletter(FILE *fp, int fflush_rewind_first)
1047 {
1048         char const *cp;
1049         int c;
1050         FILE *dbuf;
1051         ul_it lines, bytes;
1052
1053         if (fflush_rewind_first) {
1054                 (void)fflush(fp);
1055                 rewind(fp);
1056         }
1057         if (fsize(fp) == 0)
1058                 goto jleave;
1059
1060         cp = getdeadletter();
1061         c = umask(077);
1062         dbuf = Fopen(cp, "a");
1063         umask(c);
1064         if (dbuf == NULL)
1065                 goto jleave;
1066
1067         /*
1068          * There are problems with dup()ing of file-descriptors for child
1069          * processes.  As long as those are not fixed in equal spirit to
1070          * (outof(): FIX and recode.., 2012-10-04), and to avoid reviving of
1071          * bugs like (If *record* is set, avoid writing dead content twice..,
1072          * 2012-09-14), we have to somehow accomplish that the FILE* fp
1073          * makes itself comfortable with the *real* offset of the underlaying
1074          * file descriptor.  Unfortunately Standard I/O and POSIX don't
1075          * describe a way for that -- fflush();rewind(); won't do it.
1076          * This fseek(END),rewind() pair works around the problem on *BSD.
1077          */
1078         (void)fseek(fp, 0, SEEK_END);
1079         rewind(fp);
1080
1081         printf("\"%s\" ", cp);
1082         for (lines = bytes = 0; (c = getc(fp)) != EOF; ++bytes) {
1083                 putc(c, dbuf);
1084                 if (c == '\n')
1085                         ++lines;
1086         }
1087         printf("%lu/%lu\n", lines, bytes);
1088
1089         Fclose(dbuf);
1090         rewind(fp);
1091 jleave: ;
1092 }
1093
1094 static int
1095 putesc(const char *s, FILE *stream)
1096 {
1097         int     n = 0;
1098
1099         while (s[0]) {
1100                 if (s[0] == '\\') {
1101                         if (s[1] == 't') {
1102                                 if (putc('\t', stream) == EOF)
1103                                         return (-1);
1104                                 n++;
1105                                 s += 2;
1106                                 continue;
1107                         }
1108                         if (s[1] == 'n') {
1109                                 if (putc('\n', stream) == EOF)
1110                                         return (-1);
1111                                 n++;
1112                                 s += 2;
1113                                 continue;
1114                         }
1115                 }
1116                 if (putc(s[0], stream) == EOF)
1117                         return (-1);
1118                 n++;
1119                 s++;
1120         }
1121         if (putc('\n', stream) == EOF)
1122                 return (-1);
1123         return (++n);
1124 }