collect.c

   1 /*
   2  * Heirloom mailx - a mail user agent derived from Berkeley Mail.
   3  *
   4  * Copyright (c) 2000-2004 Gunnar Ritter, Freiburg i. Br., Germany.
   5  * Copyright (c) 2012 Steffen "Daode" Nurpmeso.
   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 lint
  41 #ifdef  DOSCCS
  42 static char sccsid[] = "@(#)collect.c   2.54 (gritter) 6/16/07";
  43 #endif
  44 #endif /* not lint */
  45
  46 /*
  47  * Mail -- a mail program
  48  *
  49  * Collect input from standard input, handling
  50  * ~ escapes.
  51  */
  52
  53 #include "rcv.h"
  54 #include "extern.h"
  55 #include <unistd.h>
  56 #include <sys/stat.h>
  57
  58 /* TODO longjmp() globbering as in cmd1.c and cmd3.c (see there)
  59  * TODO Problem: Popen doesn't encapsulate all cases of open failures,
  60  * TODO may leave child running if fdopen() fails! */
  61
  62 /*
  63  * Read a message from standard output and return a read file to it
  64  * or NULL on error.
  65  */
  66
  67 /*
  68  * The following hokiness with global variables is so that on
  69  * receipt of an interrupt signal, the partial message can be salted
  70  * away on dead.letter.
  71  */
  72
  73 static  sighandler_type         saveint;        /* Previous SIGINT value */
  74 static  sighandler_type         savehup;        /* Previous SIGHUP value */
  75 static  sighandler_type         savetstp;       /* Previous SIGTSTP value */
  76 static  sighandler_type         savettou;       /* Previous SIGTTOU value */
  77 static  sighandler_type         savettin;       /* Previous SIGTTIN value */
  78 static  FILE    *collf;                 /* File for saving away */
  79 static  int     hadintr;                /* Have seen one SIGINT so far */
  80
  81 static  sigjmp_buf      colljmp;        /* To get back to work */
  82 static  int             colljmp_p;      /* whether to long jump */
  83 static  sigjmp_buf      collabort;      /* To end collection with error */
  84
  85 static  sigjmp_buf pipejmp;             /* On broken pipe */
  86
  87 static void onpipe(int signo);
  88 static void insertcommand(FILE *fp, char *cmd);
  89 static void print_collf(FILE *collf, struct header *hp);
  90 static int include_file(FILE *fbuf, char *name, int *linecount,
  91                 int *charcount, int echo);
  92 static struct attachment *read_attachment_data(struct attachment *ap,
  93                 unsigned number);
  94 static struct attachment *append_attachments(struct attachment *attach,
  95                 char *names);
  96 static int exwrite(char *name, FILE *fp, int f);
  97 static enum okay makeheader(FILE *fp, struct header *hp);
  98 static void mesedit(int c, struct header *hp);
  99 static void mespipe(char *cmd);
 100 static int forward(char *ms, FILE *fp, int f);
 101 static void collstop(int s);
 102 static void collint(int s);
 103 static void collhup(int s);
 104 static int putesc(const char *s, FILE *stream);
 105
 106 /*ARGSUSED*/
 107 static void
 108 onpipe(int signo)
 109 {
 110         (void)signo;
 111         siglongjmp(pipejmp, 1);
 112 }
 113
 114 /*
 115  * Execute cmd and insert its standard output into fp.
 116  */
 117 static void
 118 insertcommand(FILE *fp, char *cmd)
 119 {
 120         FILE *obuf = NULL;
 121         char *cp;
 122         int c;
 123
 124         cp = value("SHELL");
 125         if (sigsetjmp(pipejmp, 1))
 126                 goto endpipe;
 127         if (cp == NULL)
 128                 cp = SHELL;
 129         if ((obuf = Popen(cmd, "r", cp, 0)) == NULL) {
 130                 perror(cmd);
 131                 return;
 132         }
 133         safe_signal(SIGPIPE, onpipe);
 134         while ((c = getc(obuf)) != EOF)
 135                 putc(c, fp);
 136 endpipe:
 137         safe_signal(SIGPIPE, SIG_IGN);
 138         Pclose(obuf);
 139         safe_signal(SIGPIPE, dflpipe);
 140 }
 141
 142 /*
 143  * ~p command.
 144  */
 145 static void
 146 print_collf(FILE *collf, struct header *hp)
 147 {
 148         char *lbuf = NULL;
 149         FILE *obuf = stdout;
 150         struct attachment *ap;
 151         char *cp;
 152         enum gfield     gf;
 153         size_t  linecnt, maxlines, linesize = 0, linelen, count, count2;
 154
 155         (void)&obuf;
 156         (void)&cp;
 157         fflush(collf);
 158         rewind(collf);
 159         count = count2 = fsize(collf);
 160         if (is_a_tty[0] && is_a_tty[1] && (cp = value("crt")) != NULL) {
 161                 for (linecnt = 0;
 162                         fgetline(&lbuf, &linesize, &count2, NULL, collf, 0);
 163                         linecnt++);
 164                 rewind(collf);
 165                 maxlines = (*cp == '\0' ? screensize() : atoi(cp));
 166                 maxlines -= 4;
 167                 if (hp->h_to)
 168                         maxlines--;
 169                 if (hp->h_subject)
 170                         maxlines--;
 171                 if (hp->h_cc)
 172                         maxlines--;
 173                 if (hp->h_bcc)
 174                         maxlines--;
 175                 if (hp->h_attach)
 176                         maxlines--;
 177                 maxlines -= myaddrs(hp) != NULL || hp->h_from != NULL;
 178                 maxlines -= value("ORGANIZATION") != NULL ||
 179                         hp->h_organization != NULL;
 180                 maxlines -= value("replyto") != NULL || hp->h_replyto != NULL;
 181                 maxlines -= value("sender") != NULL || hp->h_sender != NULL;
 182                 if ((long)maxlines < 0 || linecnt > maxlines) {
 183                         cp = get_pager();
 184                         if (sigsetjmp(pipejmp, 1))
 185                                 goto endpipe;
 186                         obuf = Popen(cp, "w", NULL, 1);
 187                         if (obuf == NULL) {
 188                                 perror(cp);
 189                                 obuf = stdout;
 190                         } else
 191                                 safe_signal(SIGPIPE, onpipe);
 192                 }
 193         }
 194         fprintf(obuf, catgets(catd, CATSET, 62,
 195                                 "-------\nMessage contains:\n"));
 196         gf = GIDENT|GTO|GSUBJECT|GCC|GBCC|GNL|GFILES;
 197         if (value("fullnames"))
 198                 gf |= GCOMMA;
 199         puthead(hp, obuf, gf, SEND_TODISP, CONV_NONE, NULL, NULL);
 200         while (fgetline(&lbuf, &linesize, &count, &linelen, collf, 1))
 201                 prout(lbuf, linelen, obuf);
 202         if (hp->h_attach != NULL) {
 203                 fputs(catgets(catd, CATSET, 63, "Attachments:"), obuf);
 204                 for (ap = hp->h_attach; ap != NULL; ap = ap->a_flink) {
 205                         if (ap->a_msgno)
 206                                 fprintf(obuf, " message %u", ap->a_msgno);
 207                         else
 208                                 fprintf(obuf, " %s", ap->a_name);
 209                         if (ap->a_flink)
 210                                 putc(',', obuf);
 211                 }
 212                 putc('\n', obuf);
 213         }
 214 endpipe:
 215         if (obuf != stdout) {
 216                 safe_signal(SIGPIPE, SIG_IGN);
 217                 Pclose(obuf);
 218                 safe_signal(SIGPIPE, dflpipe);
 219         }
 220         if (lbuf)
 221                 free(lbuf);
 222 }
 223
 224 static int
 225 include_file(FILE *fbuf, char *name, int *linecount, int *charcount, int echo)
 226 {
 227         char *interactive, *linebuf = NULL;
 228         size_t linesize = 0, linelen, count;
 229
 230         if (fbuf == NULL)
 231                 fbuf = Fopen(name, "r");
 232         if (fbuf == NULL) {
 233                 perror(name);
 234                 return -1;
 235         }
 236         interactive = value("interactive");
 237         *linecount = 0;
 238         *charcount = 0;
 239         fflush(fbuf);
 240         rewind(fbuf);
 241         count = fsize(fbuf);
 242         while (fgetline(&linebuf, &linesize, &count, &linelen, fbuf, 0)
 243                         != NULL) {
 244                 if (fwrite(linebuf, sizeof *linebuf, linelen, collf)
 245                                 != linelen) {
 246                         Fclose(fbuf);
 247                         return -1;
 248                 }
 249                 if (interactive != NULL && echo)
 250                         fwrite(linebuf, sizeof *linebuf, linelen, stdout);
 251                 (*linecount)++;
 252                 (*charcount) += linelen;
 253         }
 254         if (linebuf)
 255                 free(linebuf);
 256         Fclose(fbuf);
 257         return 0;
 258 }
 259
 260 /*
 261  * Ask the user to edit file names and other data for the given
 262  * attachment. NULL is returned if no file name is given.
 263  */
 264 static struct attachment *
 265 read_attachment_data(struct attachment *ap, unsigned number)
 266 {
 267         char prefix[80], *cp;
 268
 269         if (ap == NULL)
 270                 ap = csalloc(1, sizeof *ap);
 271         if (ap->a_msgno) {
 272                 printf("#%u\tmessage %u\n", number, ap->a_msgno);
 273                 return ap;
 274         }
 275         snprintf(prefix, sizeof prefix, catgets(catd, CATSET, 50,
 276                         "#%u\tfilename: "), number);
 277         for (;;) {
 278                 char *exf;
 279                 if ((ap->a_name = readtty(prefix, ap->a_name)) == NULL)
 280                         break;
 281                 if ((exf = expand(ap->a_name)) != NULL)
 282                         ap->a_name = exf;
 283                 if (access(ap->a_name, R_OK) == 0)
 284                         break;
 285                 perror(ap->a_name);
 286         }
 287         if ((ap->a_name && (value("attachment-ask-charset"))) ||
 288                         ((cp = value("sendcharsets")) != NULL &&
 289                          strchr(cp, ',') != NULL)) {
 290                 snprintf(prefix, sizeof prefix, "#%u\tcharset: ", number);
 291                 ap->a_charset = readtty(prefix, ap->a_charset);
 292         }
 293         /*
 294          * The "attachment-ask-content-*" variables are left undocumented
 295          * since they are for RFC connoisseurs only.
 296          */
 297         if (ap->a_name && value("attachment-ask-content-type")) {
 298                 if (ap->a_content_type == NULL)
 299                         ap->a_content_type = mime_filecontent(ap->a_name);
 300                 snprintf(prefix, sizeof prefix, "#%u\tContent-Type: ", number);
 301                 ap->a_content_type = readtty(prefix, ap->a_content_type);
 302         }
 303         if (ap->a_name && value("attachment-ask-content-disposition")) {
 304                 snprintf(prefix, sizeof prefix,
 305                                 "#%u\tContent-Disposition: ", number);
 306                 ap->a_content_disposition = readtty(prefix,
 307                                 ap->a_content_disposition);
 308         }
 309         if (ap->a_name && value("attachment-ask-content-id")) {
 310                 snprintf(prefix, sizeof prefix, "#%u\tContent-ID: ", number);
 311                 ap->a_content_id = readtty(prefix, ap->a_content_id);
 312         }
 313         if (ap->a_name && value("attachment-ask-content-description")) {
 314                 snprintf(prefix, sizeof prefix,
 315                                 "#%u\tContent-Description: ", number);
 316                 ap->a_content_description = readtty(prefix,
 317                                 ap->a_content_description);
 318         }
 319         return ap->a_name ? ap : NULL;
 320 }
 321
 322 /*
 323  * Interactively edit the attachment list.
 324  */
 325 struct attachment *
 326 edit_attachments(struct attachment *attach)
 327 {
 328         struct attachment *ap, *nap;
 329         unsigned attno = 1;
 330
 331         for (ap = attach; ap; ap = ap->a_flink) {
 332                 if ((nap = read_attachment_data(ap, attno)) == NULL) {
 333                         if (ap->a_blink)
 334                                 ap->a_blink->a_flink = ap->a_flink;
 335                         else
 336                                 attach = ap->a_flink;
 337                         if (ap->a_flink)
 338                                 ap->a_flink->a_blink = ap->a_blink;
 339                         else
 340                                 return attach;
 341                 } else
 342                         attno++;
 343         }
 344         while ((nap = read_attachment_data(NULL, attno)) != NULL) {
 345                 for (ap = attach; ap && ap->a_flink; ap = ap->a_flink);
 346                 if (ap)
 347                         ap->a_flink = nap;
 348                 nap->a_blink = ap;
 349                 nap->a_flink = NULL;
 350                 if (attach == NULL)
 351                         attach = nap;
 352                 attno++;
 353         }
 354         return attach;
 355 }
 356
 357 /*
 358  * Put the given file to the end of the attachment list.
 359  */
 360 struct attachment *
 361 add_attachment(struct attachment *attach, char *file, int expand_file)
 362 {
 363         struct attachment *ap, *nap;
 364
 365         if (expand_file) {
 366                 file = expand(file);
 367                 if (file == NULL)
 368                         return NULL;
 369         } else
 370                 file = savestr(file);
 371         if (access(file, R_OK) != 0)
 372                 return NULL;
 373         /*LINTED*/
 374         nap = csalloc(1, sizeof *nap);
 375         nap->a_name = file;
 376         if (attach != NULL) {
 377                 for (ap = attach; ap->a_flink != NULL; ap = ap->a_flink);
 378                 ap->a_flink = nap;
 379                 nap->a_blink = ap;
 380         } else {
 381                 nap->a_blink = NULL;
 382                 attach = nap;
 383         }
 384         return attach;
 385 }
 386
 387 /*
 388  * Append the whitespace-separated file names to the end of
 389  * the attachment list.
 390  */
 391 static struct attachment *
 392 append_attachments(struct attachment *attach, char *names)
 393 {
 394         char *cp;
 395         int c;
 396         struct attachment *ap;
 397
 398         cp = names;
 399         while (*cp != '\0' && blankchar(*cp & 0377))
 400                 cp++;
 401         while (*cp != '\0') {
 402                 names = cp;
 403                 while (*cp != '\0' && !blankchar(*cp & 0377))
 404                         cp++;
 405                 c = *cp;
 406                 *cp++ = '\0';
 407                 if (*names != '\0') {
 408                         if ((ap = add_attachment(attach, names, 1)) == NULL)
 409                                 perror(names);
 410                         else
 411                                 attach = ap;
 412                 }
 413                 if (c == '\0')
 414                         break;
 415                 while (*cp != '\0' && blankchar(*cp & 0377))
 416                         cp++;
 417         }
 418         return attach;
 419 }
 420
 421 FILE *
 422 collect(struct header *hp, int printheaders, struct message *mp,
 423                 char *quotefile, int doprefix, int tflag)
 424 {
 425         FILE *fbuf;
 426         struct ignoretab *quoteig;
 427         int lc, cc, escape, eofcount;
 428         int c, t;
 429         char *linebuf = NULL, *cp, *quote = NULL;
 430         size_t linesize;
 431         char *tempMail = NULL;
 432         int getfields;
 433         sigset_t oset, nset;
 434         long count;
 435         enum sendaction action;
 436         sighandler_type savedtop;
 437
 438         collf = NULL;
 439         /*
 440          * Start catching signals from here, but we're still die on interrupts
 441          * until we're in the main loop.
 442          */
 443         sigemptyset(&nset);
 444         sigaddset(&nset, SIGINT);
 445         sigaddset(&nset, SIGHUP);
 446         sigprocmask(SIG_BLOCK, &nset, &oset);
 447         handlerpush(collint);
 448         if ((saveint = safe_signal(SIGINT, SIG_IGN)) != SIG_IGN)
 449                 safe_signal(SIGINT, collint);
 450         if ((savehup = safe_signal(SIGHUP, SIG_IGN)) != SIG_IGN)
 451                 safe_signal(SIGHUP, collhup);
 452         savetstp = safe_signal(SIGTSTP, collstop);
 453         savettou = safe_signal(SIGTTOU, collstop);
 454         savettin = safe_signal(SIGTTIN, collstop);
 455         if (sigsetjmp(collabort, 1)) {
 456                 if (tempMail != NULL) {
 457                         rm(tempMail);
 458                         Ftfree(&tempMail);
 459                 }
 460                 goto err;
 461         }
 462         if (sigsetjmp(colljmp, 1)) {
 463                 if (tempMail != NULL) {
 464                         rm(tempMail);
 465                         Ftfree(&tempMail);
 466                 }
 467                 goto err;
 468         }
 469         sigprocmask(SIG_SETMASK, &oset, (sigset_t *)NULL);
 470
 471         noreset++;
 472         if ((collf = Ftemp(&tempMail, "Rs", "w+", 0600, 1)) == NULL) {
 473                 perror(catgets(catd, CATSET, 51, "temporary mail file"));
 474                 goto err;
 475         }
 476         unlink(tempMail);
 477         Ftfree(&tempMail);
 478
 479         if ((cp = value("SNAIL_HEAD")) != NULL) {
 480                 if (is_a_tty[0])
 481                         putesc(cp, stdout);
 482                 putesc(cp, collf);
 483         }
 484
 485         /*
 486          * If we are going to prompt for a subject,
 487          * refrain from printing a newline after
 488          * the headers (since some people mind).
 489          */
 490         getfields = 0;
 491         if (!tflag) {
 492                 t = GTO|GSUBJECT|GCC|GNL;
 493                 if (value("fullnames"))
 494                         t |= GCOMMA;
 495                 if (hp->h_subject == NULL && value("interactive") != NULL &&
 496                             (value("ask") != NULL || value("asksub") != NULL))
 497                         t &= ~GNL, getfields |= GSUBJECT;
 498                 if (hp->h_to == NULL && value("interactive") != NULL)
 499                         t &= ~GNL, getfields |= GTO;
 500                 if (value("bsdcompat") == NULL && value("askatend") == NULL &&
 501                                 value("interactive")) {
 502                         if (hp->h_bcc == NULL && value("askbcc"))
 503                                 t &= ~GNL, getfields |= GBCC;
 504                         if (hp->h_cc == NULL && value("askcc"))
 505                                 t &= ~GNL, getfields |= GCC;
 506                 }
 507                 if (printheaders) {
 508                         puthead(hp, stdout, t, SEND_TODISP, CONV_NONE,
 509                                         NULL, NULL);
 510                         fflush(stdout);
 511                 }
 512         }
 513
 514         /*
 515          * Quote an original message
 516          */
 517         if (mp != NULL && (doprefix || (quote = value("quote")) != NULL)) {
 518                 quoteig = allignore;
 519                 action = SEND_QUOTE;
 520                 if (doprefix) {
 521                         quoteig = fwdignore;
 522                         if ((cp = value("fwdheading")) == NULL)
 523                                 cp = "-------- Original Message --------";
 524                         if (*cp) {
 525                                 fprintf(collf, "%s\n", cp);
 526                                 fprintf(stdout, "%s\n", cp);
 527                         }
 528                 } else if (strcmp(quote, "noheading") == 0) {
 529                         /*EMPTY*/;
 530                 } else if (strcmp(quote, "headers") == 0) {
 531                         quoteig = ignore;
 532                 } else if (strcmp(quote, "allheaders") == 0) {
 533                         quoteig = NULL;
 534                         action = SEND_QUOTE_ALL;
 535                 } else {
 536                         cp = hfield("from", mp);
 537                         if (cp != NULL) {
 538                                 mime_write(cp, strlen(cp),
 539                                                 collf, CONV_FROMHDR, TD_NONE,
 540                                                 NULL, (size_t) 0,
 541                                                 NULL, NULL);
 542                                 mime_write(cp, strlen(cp),
 543                                                 stdout, CONV_FROMHDR, TD_NONE,
 544                                                 NULL, (size_t) 0,
 545                                                 NULL, NULL);
 546                                 fwrite(catgets(catd, CATSET, 52,
 547                                         " wrote:\n\n"), sizeof(char), 9, collf);
 548                                 fwrite(catgets(catd, CATSET, 52,
 549                                         " wrote:\n\n"), sizeof(char), 9, stdout);
 550                         }
 551                 }
 552                 cp = value("indentprefix");
 553                 if (cp != NULL && *cp == '\0')
 554                         cp = "\t";
 555                 send(mp, collf, quoteig, doprefix ? NULL : cp, action, NULL);
 556                 send(mp, stdout, quoteig, doprefix ? NULL : cp, action, NULL);
 557         }
 558
 559         if ((cp = value("escape")) != NULL)
 560                 escape = *cp;
 561         else
 562                 escape = ESCAPE;
 563         eofcount = 0;
 564         hadintr = 0;
 565
 566         if (!sigsetjmp(colljmp, 1)) {
 567                 if (getfields)
 568                         grabh(hp, getfields, 1);
 569                 if (quotefile != NULL) {
 570                         if (include_file(NULL, quotefile, &lc, &cc, 1) != 0)
 571                                 goto err;
 572                 }
 573         } else {
 574                 /*
 575                  * Come here for printing the after-signal message.
 576                  * Duplicate messages won't be printed because
 577                  * the write is aborted if we get a SIGTTOU.
 578                  */
 579 cont:
 580                 if (hadintr) {
 581                         fflush(stdout);
 582                         fprintf(stderr, catgets(catd, CATSET, 53,
 583                                 "\n(Interrupt -- one more to kill letter)\n"));
 584                 } else {
 585                         printf(catgets(catd, CATSET, 54, "(continue)\n"));
 586                         fflush(stdout);
 587                 }
 588         }
 589         if (value("interactive") == NULL && tildeflag <= 0 && !is_a_tty[0] &&
 590                         !tflag) {
 591                 /*
 592                  * No tilde escapes, interrupts not expected. Copy
 593                  * standard input the simple way.
 594                  */
 595                 linebuf = srealloc(linebuf, linesize = BUFSIZ);
 596                 while ((count = fread(linebuf, sizeof *linebuf,
 597                                                 linesize, stdin)) > 0) {
 598                         if ((size_t)count != fwrite(linebuf, sizeof *linebuf,
 599                                                 count, collf))
 600                                 goto err;
 601                 }
 602                 goto out;
 603         }
 604         for (;;) {
 605                 colljmp_p = 1;
 606                 count = readline(stdin, &linebuf, &linesize);
 607                 colljmp_p = 0;
 608                 if (count < 0) {
 609                         if (value("interactive") != NULL &&
 610                             value("ignoreeof") != NULL && ++eofcount < 25) {
 611                                 printf(catgets(catd, CATSET, 55,
 612                                         "Use \".\" to terminate letter\n"));
 613                                 continue;
 614                         }
 615                         break;
 616                 }
 617                 if (tflag && count == 0) {
 618                         rewind(collf);
 619                         if (makeheader(collf, hp) != OKAY)
 620                                 goto err;
 621                         rewind(collf);
 622                         tflag = 0;
 623                         continue;
 624                 }
 625                 eofcount = 0;
 626                 hadintr = 0;
 627                 if (linebuf[0] == '.' && linebuf[1] == '\0' &&
 628                     value("interactive") != NULL &&
 629                     (value("dot") != NULL || value("ignoreeof") != NULL))
 630                         break;
 631                 if (linebuf[0] != escape ||
 632                                 (value("interactive") == NULL &&
 633                                         tildeflag == 0) ||
 634                                 tildeflag < 0) {
 635                         if (putline(collf, linebuf, count) < 0)
 636                                 goto err;
 637                         continue;
 638                 }
 639                 c = linebuf[1];
 640                 switch (c) {
 641                 default:
 642                         /*
 643                          * On double escape, just send the single one.
 644                          * Otherwise, it's an error.
 645                          */
 646                         if (c == escape) {
 647                                 if (putline(collf, &linebuf[1], count - 1) < 0)
 648                                         goto err;
 649                                 else
 650                                         break;
 651                         }
 652                         printf(catgets(catd, CATSET, 56,
 653                                         "Unknown tilde escape.\n"));
 654                         break;
 655 #ifdef  DEBUG_COMMANDS
 656                 case 'C':
 657                         /*
 658                          * Dump core.
 659                          */
 660                         core(NULL);
 661                         break;
 662 #endif  /* DEBUG_COMMANDS */
 663                 case '!':
 664                         /*
 665                          * Shell escape, send the balance of the
 666                          * line to sh -c.
 667                          */
 668                         shell(&linebuf[2]);
 669                         break;
 670                 case ':':
 671                 case '_':
 672                         /*
 673                          * Escape to command mode, but be nice!
 674                          */
 675                         inhook = 0;
 676                         execute(&linebuf[2], 1, count - 2);
 677                         goto cont;
 678                 case '.':
 679                         /*
 680                          * Simulate end of file on input.
 681                          */
 682                         goto out;
 683                 case 'x':
 684                         /*
 685                          * Same as 'q', but no dead.letter saving.
 686                          */
 687                         hadintr++;
 688                         collint(0);
 689                         exit(1);
 690                         /*NOTREACHED*/
 691                 case 'q':
 692                         /*
 693                          * Force a quit of sending mail.
 694                          * Act like an interrupt happened.
 695                          */
 696                         hadintr++;
 697                         collint(SIGINT);
 698                         exit(1);
 699                         /*NOTREACHED*/
 700                 case 'h':
 701                         /*
 702                          * Grab a bunch of headers.
 703                          */
 704                         do
 705                                 grabh(hp, GTO|GSUBJECT|GCC|GBCC,
 706                                                 value("bsdcompat") != NULL &&
 707                                                 value("bsdorder") != NULL);
 708                         while (hp->h_to == NULL);
 709                         goto cont;
 710                 case 'H':
 711                         /*
 712                          * Grab extra headers.
 713                          */
 714                         do
 715                                 grabh(hp, GEXTRA, 0);
 716                         while (check_from_and_sender(hp->h_from, hp->h_sender));
 717                         goto cont;
 718                 case 't':
 719                         /*
 720                          * Add to the To list.
 721                          */
 722                         while ((hp->h_to = checkaddrs(cat(hp->h_to,
 723                                         sextract(&linebuf[2], GTO|GFULL))))
 724                                 == NULL);
 725                         break;
 726                 case 's':
 727                         /*
 728                          * Set the Subject list.
 729                          */
 730                         cp = &linebuf[2];
 731                         while (whitechar(*cp & 0377))
 732                                 cp++;
 733                         hp->h_subject = savestr(cp);
 734                         break;
 735                 case '@':
 736                         /*
 737                          * Edit the attachment list.
 738                          */
 739                         if (linebuf[2] != '\0')
 740                                 hp->h_attach = append_attachments(hp->h_attach,
 741                                                 &linebuf[2]);
 742                         else
 743                                 hp->h_attach = edit_attachments(hp->h_attach);
 744                         break;
 745                 case 'c':
 746                         /*
 747                          * Add to the CC list.
 748                          */
 749                         hp->h_cc = checkaddrs(cat(hp->h_cc,
 750                                 sextract(&linebuf[2], GCC|GFULL)));
 751                         break;
 752                 case 'b':
 753                         /*
 754                          * Add stuff to blind carbon copies list.
 755                          */
 756                         hp->h_bcc = checkaddrs(cat(hp->h_bcc,
 757                                 sextract(&linebuf[2], GBCC|GFULL)));
 758                         break;
 759                 case 'd':
 760                         strncpy(linebuf + 2, getdeadletter(), linesize - 2);
 761                         linebuf[linesize-1]='\0';
 762                         /*FALLTHRU*/
 763                 case 'r':
 764                 case '<':
 765                         /*
 766                          * Invoke a file:
 767                          * Search for the file name,
 768                          * then open it and copy the contents to collf.
 769                          */
 770                         cp = &linebuf[2];
 771                         while (whitechar(*cp & 0377))
 772                                 cp++;
 773                         if (*cp == '\0') {
 774                                 printf(catgets(catd, CATSET, 57,
 775                                                 "Interpolate what file?\n"));
 776                                 break;
 777                         }
 778                         if (*cp == '!') {
 779                                 insertcommand(collf, cp + 1);
 780                                 break;
 781                         }
 782                         cp = expand(cp);
 783                         if (cp == NULL)
 784                                 break;
 785                         if (is_dir(cp)) {
 786                                 printf(catgets(catd, CATSET, 58,
 787                                                 "%s: Directory\n"), cp);
 788                                 break;
 789                         }
 790                         if ((fbuf = Fopen(cp, "r")) == NULL) {
 791                                 perror(cp);
 792                                 break;
 793                         }
 794                         printf(catgets(catd, CATSET, 59, "\"%s\" "), cp);
 795                         fflush(stdout);
 796                         if (include_file(fbuf, cp, &lc, &cc, 0) != 0)
 797                                 goto err;
 798                         printf(catgets(catd, CATSET, 60, "%d/%d\n"), lc, cc);
 799                         break;
 800                 case 'i':
 801                         /*
 802                          * Insert an environment variable into the file.
 803                          */
 804                         cp = &linebuf[2];
 805                         while (whitechar(*cp & 0377))
 806                                 cp++;
 807                         if ((cp = value(cp)) == NULL || *cp == '\0')
 808                                 break;
 809                         if (is_a_tty[0])
 810                                 putesc(cp, stdout);
 811                         putesc(cp, collf);
 812                         break;
 813                 case 'a':
 814                 case 'A':
 815                         /*
 816                          * Insert the contents of a signature variable.
 817                          */
 818                         if ((cp = value(c == 'a' ? "sign" : "Sign")) != NULL &&
 819                                         *cp != '\0') {
 820                                 if (is_a_tty[0])
 821                                         putesc(cp, stdout);
 822                                 putesc(cp, collf);
 823                         }
 824                         break;
 825                 case 'w':
 826                         /*
 827                          * Write the message on a file.
 828                          */
 829                         cp = &linebuf[2];
 830                         while (blankchar(*cp & 0377))
 831                                 cp++;
 832                         if (*cp == '\0') {
 833                                 fprintf(stderr, catgets(catd, CATSET, 61,
 834                                                 "Write what file!?\n"));
 835                                 break;
 836                         }
 837                         if ((cp = expand(cp)) == NULL)
 838                                 break;
 839                         rewind(collf);
 840                         exwrite(cp, collf, 1);
 841                         break;
 842                 case 'm':
 843                 case 'M':
 844                 case 'f':
 845                 case 'F':
 846                         /*
 847                          * Interpolate the named messages, if we
 848                          * are in receiving mail mode.  Does the
 849                          * standard list processing garbage.
 850                          * If ~f is given, we don't shift over.
 851                          */
 852                         if (forward(linebuf + 2, collf, c) < 0)
 853                                 goto err;
 854                         goto cont;
 855                 case 'p':
 856                         /*
 857                          * Print out the current state of the
 858                          * message without altering anything.
 859                          */
 860                         print_collf(collf, hp);
 861                         goto cont;
 862                 case '|':
 863                         /*
 864                          * Pipe message through command.
 865                          * Collect output as new message.
 866                          */
 867                         rewind(collf);
 868                         mespipe(&linebuf[2]);
 869                         goto cont;
 870                 case 'v':
 871                 case 'e':
 872                         /*
 873                          * Edit the current message.
 874                          * 'e' means to use EDITOR
 875                          * 'v' means to use VISUAL
 876                          */
 877                         rewind(collf);
 878                         mesedit(c, value("editheaders") ? hp : NULL);
 879                         goto cont;
 880                 case '?':
 881                         /*
 882                          * Last the lengthy help string.
 883                          * (Very ugly, but take care for compiler supported
 884                          * string lengths :()
 885                          */
 886                         puts(
 887 "-------------------- ~ ESCAPES ----------------------------\n"
 888 "~~             Quote a single tilde\n"
 889 "~@ [file ...]  Edit attachment list\n"
 890 "~b users       Add users to \"blind\" cc list\n"
 891 "~c users       Add users to cc list\n"
 892 "~d             Read in dead.letter\n"
 893 "~e             Edit the message buffer\n"
 894 "~f messages    Read in messages without indenting lines\n"
 895 "~F messages    Same as ~f, but keep all header lines\n"
 896 "~h             Prompt for to list, subject, cc, and \"blind\" cc list\n");
 897                         puts(
 898 "~r file        Read a file into the message buffer\n"
 899 "~p             Print the message buffer\n"
 900 "~q             Abort message composition and save text to dead.letter\n"
 901 "~m messages    Read in messages with each line indented\n"
 902 "~M messages    Same as ~m, but keep all header lines\n"
 903 "~s subject     Set subject\n"
 904 "~t users       Add users to to list\n"
 905 "~v             Invoke display editor on message\n"
 906 "~w file        Write message onto file\n"
 907 "~x             Abort message composition and discard text written so far\n");
 908                         puts(
 909 "~!command      Invoke the shell\n"
 910 "~:command      Execute a regular command\n"
 911 "-----------------------------------------------------------\n");
 912                         break;
 913
 914                 }
 915         }
 916         goto out;
 917 err:
 918         if (collf != NULL) {
 919                 Fclose(collf);
 920                 collf = NULL;
 921         }
 922 out:
 923         if (collf != NULL) {
 924                 if ((cp = value("SNAIL_TAIL")) != NULL) {
 925                         if (is_a_tty[0])
 926                                 putesc(cp, stdout);
 927                         fflush(collf);
 928                         putesc(cp, collf);
 929                 }
 930                 rewind(collf);
 931         }
 932         handlerpop();
 933         noreset--;
 934         sigemptyset(&nset);
 935         sigaddset(&nset, SIGINT);
 936         sigaddset(&nset, SIGHUP);
 937 #ifndef OLDBUG
 938         sigprocmask(SIG_BLOCK, &nset, (sigset_t *)NULL);
 939 #else
 940         sigprocmask(SIG_BLOCK, &nset, &oset);
 941 #endif
 942         safe_signal(SIGINT, saveint);
 943         safe_signal(SIGHUP, savehup);
 944         safe_signal(SIGTSTP, savetstp);
 945         safe_signal(SIGTTOU, savettou);
 946         safe_signal(SIGTTIN, savettin);
 947         sigprocmask(SIG_SETMASK, &oset, (sigset_t *)NULL);
 948         return collf;
 949 }
 950
 951 /*
 952  * Write a file, ex-like if f set.
 953  */
 954 static int
 955 exwrite(char *name, FILE *fp, int f)
 956 {
 957         FILE *of;
 958         int c;
 959         long cc;
 960         int lc;
 961
 962         if (f) {
 963                 printf("\"%s\" ", name);
 964                 fflush(stdout);
 965         }
 966         if ((of = Fopen(name, "a")) == NULL) {
 967                 perror(NULL);
 968                 return(-1);
 969         }
 970         lc = 0;
 971         cc = 0;
 972         while ((c = getc(fp)) != EOF) {
 973                 cc++;
 974                 if (c == '\n')
 975                         lc++;
 976                 putc(c, of);
 977                 if (ferror(of)) {
 978                         perror(name);
 979                         Fclose(of);
 980                         return(-1);
 981                 }
 982         }
 983         Fclose(of);
 984         printf(catgets(catd, CATSET, 65, "%d/%ld\n"), lc, cc);
 985         fflush(stdout);
 986         return(0);
 987 }
 988
 989 static enum okay
 990 makeheader(FILE *fp, struct header *hp)
 991 {
 992         char *tempEdit;
 993         FILE *nf;
 994         int c;
 995
 996         if ((nf = Ftemp(&tempEdit, "Re", "w+", 0600, 1)) == NULL) {
 997                 perror(catgets(catd, CATSET, 66, "temporary mail edit file"));
 998                 Fclose(nf);
 999                 unlink(tempEdit);
1000                 Ftfree(&tempEdit);
1001                 return STOP;
1002         }
1003         unlink(tempEdit);
1004         Ftfree(&tempEdit);
1005         extract_header(fp, hp);
1006         while ((c = getc(fp)) != EOF)
1007                 putc(c, nf);
1008         if (fp != collf)
1009                 Fclose(collf);
1010         Fclose(fp);
1011         collf = nf;
1012         if (check_from_and_sender(hp->h_from, hp->h_sender))
1013                 return STOP;
1014         return OKAY;
1015 }
1016
1017 /*
1018  * Edit the message being collected on fp.
1019  * On return, make the edit file the new temp file.
1020  */
1021 static void
1022 mesedit(int c, struct header *hp)
1023 {
1024         sighandler_type sigint = safe_signal(SIGINT, SIG_IGN);
1025         FILE *nf = run_editor(collf, (off_t)-1, c, 0, hp, NULL, SEND_MBOX,
1026                         sigint);
1027
1028         if (nf != NULL) {
1029                 if (hp) {
1030                         rewind(nf);
1031                         makeheader(nf, hp);
1032                 } else {
1033                         fseek(nf, 0L, SEEK_END);
1034                         Fclose(collf);
1035                         collf = nf;
1036                 }
1037         }
1038         safe_signal(SIGINT, sigint);
1039 }
1040
1041 /*
1042  * Pipe the message through the command.
1043  * Old message is on stdin of command;
1044  * New message collected from stdout.
1045  * Sh -c must return 0 to accept the new message.
1046  */
1047 static void
1048 mespipe(char *cmd)
1049 {
1050         FILE *nf;
1051         sighandler_type sigint = safe_signal(SIGINT, SIG_IGN);
1052         char *tempEdit;
1053         char *shell;
1054
1055         if ((nf = Ftemp(&tempEdit, "Re", "w+", 0600, 1)) == NULL) {
1056                 perror(catgets(catd, CATSET, 66, "temporary mail edit file"));
1057                 goto out;
1058         }
1059         fflush(collf);
1060         unlink(tempEdit);
1061         Ftfree(&tempEdit);
1062         /*
1063          * stdin = current message.
1064          * stdout = new message.
1065          */
1066         if ((shell = value("SHELL")) == NULL)
1067                 shell = SHELL;
1068         if (run_command(shell,
1069             0, fileno(collf), fileno(nf), "-c", cmd, NULL) < 0) {
1070                 Fclose(nf);
1071                 goto out;
1072         }
1073         if (fsize(nf) == 0) {
1074                 fprintf(stderr, catgets(catd, CATSET, 67,
1075                                 "No bytes from \"%s\" !?\n"), cmd);
1076                 Fclose(nf);
1077                 goto out;
1078         }
1079         /*
1080          * Take new files.
1081          */
1082         fseek(nf, 0L, SEEK_END);
1083         Fclose(collf);
1084         collf = nf;
1085 out:
1086         safe_signal(SIGINT, sigint);
1087 }
1088
1089 /*
1090  * Interpolate the named messages into the current
1091  * message, preceding each line with a tab.
1092  * Return a count of the number of characters now in
1093  * the message, or -1 if an error is encountered writing
1094  * the message temporary.  The flag argument is 'm' if we
1095  * should shift over and 'f' if not.
1096  */
1097 static int
1098 forward(char *ms, FILE *fp, int f)
1099 {
1100         int *msgvec;
1101         struct ignoretab *ig;
1102         char *tabst;
1103         enum sendaction action;
1104
1105         /*LINTED*/
1106         msgvec = (int *)salloc((msgCount+1) * sizeof *msgvec);
1107         if (msgvec == NULL)
1108                 return(0);
1109         if (getmsglist(ms, msgvec, 0) < 0)
1110                 return(0);
1111         if (*msgvec == 0) {
1112                 *msgvec = first(0, MMNORM);
1113                 if (*msgvec == 0) {
1114                         printf(catgets(catd, CATSET, 68,
1115                                         "No appropriate messages\n"));
1116                         return(0);
1117                 }
1118                 msgvec[1] = 0;
1119         }
1120         if (f == 'f' || f == 'F')
1121                 tabst = NULL;
1122         else if ((tabst = value("indentprefix")) == NULL)
1123                 tabst = "\t";
1124         ig = upperchar(f) ? (struct ignoretab *)NULL : ignore;
1125         action = upperchar(f) ? SEND_QUOTE_ALL : SEND_QUOTE;
1126         printf(catgets(catd, CATSET, 69, "Interpolating:"));
1127         for (; *msgvec != 0; msgvec++) {
1128                 struct message *mp = message + *msgvec - 1;
1129
1130                 touch(mp);
1131                 printf(" %d", *msgvec);
1132                 if (send(mp, fp, ig, tabst, action, NULL) < 0) {
1133                         perror(catgets(catd, CATSET, 70,
1134                                         "temporary mail file"));
1135                         return(-1);
1136                 }
1137         }
1138         printf("\n");
1139         return(0);
1140 }
1141
1142 /*
1143  * Print (continue) when continued after ^Z.
1144  */
1145 /*ARGSUSED*/
1146 static void
1147 collstop(int s)
1148 {
1149         sighandler_type old_action = safe_signal(s, SIG_DFL);
1150         sigset_t nset;
1151
1152         sigemptyset(&nset);
1153         sigaddset(&nset, s);
1154         sigprocmask(SIG_UNBLOCK, &nset, (sigset_t *)NULL);
1155         kill(0, s);
1156         sigprocmask(SIG_BLOCK, &nset, (sigset_t *)NULL);
1157         safe_signal(s, old_action);
1158         if (colljmp_p) {
1159                 colljmp_p = 0;
1160                 hadintr = 0;
1161                 siglongjmp(colljmp, 1);
1162         }
1163 }
1164
1165 /*
1166  * On interrupt, come here to save the partial message in ~/dead.letter.
1167  * Then jump out of the collection loop.
1168  */
1169 /*ARGSUSED*/
1170 static void
1171 collint(int s)
1172 {
1173         /*
1174          * the control flow is subtle, because we can be called from ~q.
1175          */
1176         if (!hadintr) {
1177                 if (value("ignore") != NULL) {
1178                         puts("@");
1179                         fflush(stdout);
1180                         clearerr(stdin);
1181                         return;
1182                 }
1183                 hadintr = 1;
1184                 siglongjmp(colljmp, 1);
1185         }
1186         exit_status |= 04;
1187         rewind(collf);
1188         if (value("save") != NULL && s != 0)
1189                 savedeadletter(collf);
1190         siglongjmp(collabort, 1);
1191 }
1192
1193 /*ARGSUSED*/
1194 static void
1195 collhup(int s)
1196 {
1197         (void)s;
1198         rewind(collf);
1199         savedeadletter(collf);
1200         /*
1201          * Let's pretend nobody else wants to clean up,
1202          * a true statement at this time.
1203          */
1204         exit(1);
1205 }
1206
1207 void
1208 savedeadletter(FILE *fp)
1209 {
1210         FILE *dbuf;
1211         int c, lines = 0, bytes = 0;
1212         char *cp;
1213
1214         if (fsize(fp) == 0)
1215                 return;
1216         cp = getdeadletter();
1217         c = umask(077);
1218         dbuf = Fopen(cp, "a");
1219         umask(c);
1220         if (dbuf == NULL)
1221                 return;
1222         printf("\"%s\" ", cp);
1223         while ((c = getc(fp)) != EOF) {
1224                 putc(c, dbuf);
1225                 bytes++;
1226                 if (c == '\n')
1227                         lines++;
1228         }
1229         Fclose(dbuf);
1230         printf("%d/%d\n", lines, bytes);
1231         rewind(fp);
1232 }
1233
1234 static int
1235 putesc(const char *s, FILE *stream)
1236 {
1237         int     n = 0;
1238
1239         while (s[0]) {
1240                 if (s[0] == '\\') {
1241                         if (s[1] == 't') {
1242                                 putc('\t', stream);
1243                                 n++;
1244                                 s += 2;
1245                                 continue;
1246                         }
1247                         if (s[1] == 'n') {
1248                                 putc('\n', stream);
1249                                 n++;
1250                                 s += 2;
1251                                 continue;
1252                         }
1253                 }
1254                 putc(s[0]&0377, stream);
1255                 n++;
1256                 s++;
1257         }
1258         putc('\n', stream);
1259         return ++n;
1260 }