1 /* 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef lint 31 #if 0 32 static char sccsid[] = "@(#)collect.c 8.2 (Berkeley) 4/19/94"; 33 #endif 34 #endif /* not lint */ 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 /* 39 * Mail -- a mail program 40 * 41 * Collect input from standard input, handling 42 * ~ escapes. 43 */ 44 45 #include "rcv.h" 46 #include <fcntl.h> 47 #include "extern.h" 48 49 /* 50 * Read a message from standard input and return a read file to it 51 * or NULL on error. 52 */ 53 54 /* 55 * The following hokiness with global variables is so that on 56 * receipt of an interrupt signal, the partial message can be salted 57 * away on dead.letter. 58 */ 59 60 static sig_t saveint; /* Previous SIGINT value */ 61 static sig_t savehup; /* Previous SIGHUP value */ 62 static sig_t savetstp; /* Previous SIGTSTP value */ 63 static sig_t savettou; /* Previous SIGTTOU value */ 64 static sig_t savettin; /* Previous SIGTTIN value */ 65 static FILE *collf; /* File for saving away */ 66 static int hadintr; /* Have seen one SIGINT so far */ 67 68 static jmp_buf colljmp; /* To get back to work */ 69 static int colljmp_p; /* whether to long jump */ 70 static jmp_buf collabort; /* To end collection with error */ 71 72 FILE * 73 collect(struct header *hp, int printheaders) 74 { 75 FILE *fbuf; 76 int lc, cc, escape, eofcount, fd, c, t; 77 char linebuf[LINESIZE], tempname[PATHSIZE], *cp, getsub; 78 sigset_t nset; 79 int longline, lastlong, rc; /* So we don't make 2 or more lines 80 out of a long input line. */ 81 82 collf = NULL; 83 /* 84 * Start catching signals from here, but we're still die on interrupts 85 * until we're in the main loop. 86 */ 87 (void)sigemptyset(&nset); 88 (void)sigaddset(&nset, SIGINT); 89 (void)sigaddset(&nset, SIGHUP); 90 (void)sigprocmask(SIG_BLOCK, &nset, NULL); 91 if ((saveint = signal(SIGINT, SIG_IGN)) != SIG_IGN) 92 (void)signal(SIGINT, collint); 93 if ((savehup = signal(SIGHUP, SIG_IGN)) != SIG_IGN) 94 (void)signal(SIGHUP, collhup); 95 savetstp = signal(SIGTSTP, collstop); 96 savettou = signal(SIGTTOU, collstop); 97 savettin = signal(SIGTTIN, collstop); 98 if (setjmp(collabort) || setjmp(colljmp)) { 99 (void)rm(tempname); 100 goto err; 101 } 102 (void)sigprocmask(SIG_UNBLOCK, &nset, NULL); 103 104 noreset++; 105 (void)snprintf(tempname, sizeof(tempname), 106 "%s/mail.RsXXXXXXXXXX", tmpdir); 107 if ((fd = mkstemp(tempname)) == -1 || 108 (collf = Fdopen(fd, "w+")) == NULL) { 109 warn("%s", tempname); 110 goto err; 111 } 112 (void)rm(tempname); 113 114 /* 115 * If we are going to prompt for a subject, 116 * refrain from printing a newline after 117 * the headers (since some people mind). 118 */ 119 t = GTO|GSUBJECT|GCC|GNL; 120 getsub = 0; 121 if (hp->h_subject == NULL && value("interactive") != NULL && 122 (value("ask") != NULL || value("asksub") != NULL)) 123 t &= ~GNL, getsub++; 124 if (printheaders) { 125 puthead(hp, stdout, t); 126 (void)fflush(stdout); 127 } 128 if ((cp = value("escape")) != NULL) 129 escape = *cp; 130 else 131 escape = ESCAPE; 132 eofcount = 0; 133 hadintr = 0; 134 lastlong = 0; 135 longline = 0; 136 137 if (!setjmp(colljmp)) { 138 if (getsub) 139 grabh(hp, GSUBJECT); 140 } else { 141 /* 142 * Come here for printing the after-signal message. 143 * Duplicate messages won't be printed because 144 * the write is aborted if we get a SIGTTOU. 145 */ 146 cont: 147 if (hadintr) { 148 (void)fflush(stdout); 149 fprintf(stderr, 150 "\n(Interrupt -- one more to kill letter)\n"); 151 } else { 152 printf("(continue)\n"); 153 (void)fflush(stdout); 154 } 155 } 156 for (;;) { 157 colljmp_p = 1; 158 c = readline(stdin, linebuf, LINESIZE); 159 colljmp_p = 0; 160 if (c < 0) { 161 if (value("interactive") != NULL && 162 value("ignoreeof") != NULL && ++eofcount < 25) { 163 printf("Use \".\" to terminate letter\n"); 164 continue; 165 } 166 break; 167 } 168 lastlong = longline; 169 longline = c == LINESIZE - 1; 170 eofcount = 0; 171 hadintr = 0; 172 if (linebuf[0] == '.' && linebuf[1] == '\0' && 173 value("interactive") != NULL && !lastlong && 174 (value("dot") != NULL || value("ignoreeof") != NULL)) 175 break; 176 if (linebuf[0] != escape || value("interactive") == NULL || 177 lastlong) { 178 if (putline(collf, linebuf, !longline) < 0) 179 goto err; 180 continue; 181 } 182 c = linebuf[1]; 183 switch (c) { 184 default: 185 /* 186 * On double escape, just send the single one. 187 * Otherwise, it's an error. 188 */ 189 if (c == escape) { 190 if (putline(collf, &linebuf[1], !longline) < 0) 191 goto err; 192 else 193 break; 194 } 195 printf("Unknown tilde escape.\n"); 196 break; 197 case 'C': 198 /* 199 * Dump core. 200 */ 201 core(); 202 break; 203 case '!': 204 /* 205 * Shell escape, send the balance of the 206 * line to sh -c. 207 */ 208 shell(&linebuf[2]); 209 break; 210 case ':': 211 case '_': 212 /* 213 * Escape to command mode, but be nice! 214 */ 215 execute(&linebuf[2], 1); 216 goto cont; 217 case '.': 218 /* 219 * Simulate end of file on input. 220 */ 221 goto out; 222 case 'q': 223 /* 224 * Force a quit of sending mail. 225 * Act like an interrupt happened. 226 */ 227 hadintr++; 228 collint(SIGINT); 229 exit(1); 230 case 'x': 231 /* 232 * Exit, do not save in dead.letter. 233 */ 234 goto err; 235 case 'h': 236 /* 237 * Grab a bunch of headers. 238 */ 239 grabh(hp, GTO|GSUBJECT|GCC|GBCC); 240 goto cont; 241 case 't': 242 /* 243 * Add to the To list. 244 */ 245 hp->h_to = cat(hp->h_to, extract(&linebuf[2], GTO)); 246 break; 247 case 's': 248 /* 249 * Set the Subject line. 250 */ 251 cp = &linebuf[2]; 252 while (isspace((unsigned char)*cp)) 253 cp++; 254 hp->h_subject = savestr(cp); 255 break; 256 case 'R': 257 /* 258 * Set the Reply-To line. 259 */ 260 cp = &linebuf[2]; 261 while (isspace((unsigned char)*cp)) 262 cp++; 263 hp->h_replyto = savestr(cp); 264 break; 265 case 'c': 266 /* 267 * Add to the CC list. 268 */ 269 hp->h_cc = cat(hp->h_cc, extract(&linebuf[2], GCC)); 270 break; 271 case 'b': 272 /* 273 * Add to the BCC list. 274 */ 275 hp->h_bcc = cat(hp->h_bcc, extract(&linebuf[2], GBCC)); 276 break; 277 case 'i': 278 case 'A': 279 case 'a': 280 /* 281 * Insert named variable in message. 282 */ 283 switch(c) { 284 case 'i': 285 cp = &linebuf[2]; 286 while(isspace((unsigned char)*cp)) 287 cp++; 288 break; 289 case 'a': 290 cp = "sign"; 291 break; 292 case 'A': 293 cp = "Sign"; 294 break; 295 default: 296 goto err; 297 } 298 299 if(*cp != '\0' && (cp = value(cp)) != NULL) { 300 printf("%s\n", cp); 301 if(putline(collf, cp, 1) < 0) 302 goto err; 303 } 304 305 break; 306 case 'd': 307 /* 308 * Read in the dead letter file. 309 */ 310 if (strlcpy(linebuf + 2, getdeadletter(), 311 sizeof(linebuf) - 2) 312 >= sizeof(linebuf) - 2) { 313 printf("Line buffer overflow\n"); 314 break; 315 } 316 /* FALLTHROUGH */ 317 case 'r': 318 case '<': 319 /* 320 * Invoke a file: 321 * Search for the file name, 322 * then open it and copy the contents to collf. 323 */ 324 cp = &linebuf[2]; 325 while (isspace((unsigned char)*cp)) 326 cp++; 327 if (*cp == '\0') { 328 printf("Interpolate what file?\n"); 329 break; 330 } 331 cp = expand(cp); 332 if (cp == NULL) 333 break; 334 if (*cp == '!') { 335 /* 336 * Insert stdout of command. 337 */ 338 char *sh; 339 int nullfd, tempfd, rc; 340 char tempname2[PATHSIZE]; 341 342 if ((nullfd = open(_PATH_DEVNULL, O_RDONLY, 0)) 343 == -1) { 344 warn(_PATH_DEVNULL); 345 break; 346 } 347 348 (void)snprintf(tempname2, sizeof(tempname2), 349 "%s/mail.ReXXXXXXXXXX", tmpdir); 350 if ((tempfd = mkstemp(tempname2)) == -1 || 351 (fbuf = Fdopen(tempfd, "w+")) == NULL) { 352 warn("%s", tempname2); 353 break; 354 } 355 (void)unlink(tempname2); 356 357 if ((sh = value("SHELL")) == NULL) 358 sh = _PATH_CSHELL; 359 360 rc = run_command(sh, 0, nullfd, fileno(fbuf), 361 "-c", cp+1, NULL); 362 363 close(nullfd); 364 365 if (rc < 0) { 366 (void)Fclose(fbuf); 367 break; 368 } 369 370 if (fsize(fbuf) == 0) { 371 fprintf(stderr, 372 "No bytes from command \"%s\"\n", 373 cp+1); 374 (void)Fclose(fbuf); 375 break; 376 } 377 378 rewind(fbuf); 379 } else if (isdir(cp)) { 380 printf("%s: Directory\n", cp); 381 break; 382 } else if ((fbuf = Fopen(cp, "r")) == NULL) { 383 warn("%s", cp); 384 break; 385 } 386 printf("\"%s\" ", cp); 387 (void)fflush(stdout); 388 lc = 0; 389 cc = 0; 390 while ((rc = readline(fbuf, linebuf, LINESIZE)) >= 0) { 391 if (rc != LINESIZE - 1) 392 lc++; 393 if ((t = putline(collf, linebuf, 394 rc != LINESIZE - 1)) < 0) { 395 (void)Fclose(fbuf); 396 goto err; 397 } 398 cc += t; 399 } 400 (void)Fclose(fbuf); 401 printf("%d/%d\n", lc, cc); 402 break; 403 case 'w': 404 /* 405 * Write the message on a file. 406 */ 407 cp = &linebuf[2]; 408 while (*cp == ' ' || *cp == '\t') 409 cp++; 410 if (*cp == '\0') { 411 fprintf(stderr, "Write what file!?\n"); 412 break; 413 } 414 if ((cp = expand(cp)) == NULL) 415 break; 416 rewind(collf); 417 exwrite(cp, collf, 1); 418 break; 419 case 'm': 420 case 'M': 421 case 'f': 422 case 'F': 423 /* 424 * Interpolate the named messages, if we 425 * are in receiving mail mode. Does the 426 * standard list processing garbage. 427 * If ~f is given, we don't shift over. 428 */ 429 if (forward(linebuf + 2, collf, tempname, c) < 0) 430 goto err; 431 goto cont; 432 case '?': 433 if ((fbuf = Fopen(_PATH_TILDE, "r")) == NULL) { 434 warn("%s", _PATH_TILDE); 435 break; 436 } 437 while ((t = getc(fbuf)) != EOF) 438 (void)putchar(t); 439 (void)Fclose(fbuf); 440 break; 441 case 'p': 442 /* 443 * Print out the current state of the 444 * message without altering anything. 445 */ 446 rewind(collf); 447 printf("-------\nMessage contains:\n"); 448 puthead(hp, stdout, GTO|GSUBJECT|GCC|GBCC|GNL); 449 while ((t = getc(collf)) != EOF) 450 (void)putchar(t); 451 goto cont; 452 case '|': 453 /* 454 * Pipe message through command. 455 * Collect output as new message. 456 */ 457 rewind(collf); 458 mespipe(collf, &linebuf[2]); 459 goto cont; 460 case 'v': 461 case 'e': 462 /* 463 * Edit the current message. 464 * 'e' means to use EDITOR 465 * 'v' means to use VISUAL 466 */ 467 rewind(collf); 468 mesedit(collf, c); 469 goto cont; 470 } 471 } 472 goto out; 473 err: 474 if (collf != NULL) { 475 (void)Fclose(collf); 476 collf = NULL; 477 } 478 out: 479 if (collf != NULL) 480 rewind(collf); 481 noreset--; 482 (void)sigprocmask(SIG_BLOCK, &nset, NULL); 483 (void)signal(SIGINT, saveint); 484 (void)signal(SIGHUP, savehup); 485 (void)signal(SIGTSTP, savetstp); 486 (void)signal(SIGTTOU, savettou); 487 (void)signal(SIGTTIN, savettin); 488 (void)sigprocmask(SIG_UNBLOCK, &nset, NULL); 489 return (collf); 490 } 491 492 /* 493 * Write a file, ex-like if f set. 494 */ 495 int 496 exwrite(char name[], FILE *fp, int f) 497 { 498 FILE *of; 499 int c, lc; 500 long cc; 501 struct stat junk; 502 503 if (f) { 504 printf("\"%s\" ", name); 505 (void)fflush(stdout); 506 } 507 if (stat(name, &junk) >= 0 && S_ISREG(junk.st_mode)) { 508 if (!f) 509 fprintf(stderr, "%s: ", name); 510 fprintf(stderr, "File exists\n"); 511 return (-1); 512 } 513 if ((of = Fopen(name, "w")) == NULL) { 514 warn((char *)NULL); 515 return (-1); 516 } 517 lc = 0; 518 cc = 0; 519 while ((c = getc(fp)) != EOF) { 520 cc++; 521 if (c == '\n') 522 lc++; 523 (void)putc(c, of); 524 if (ferror(of)) { 525 warnx("%s", name); 526 (void)Fclose(of); 527 return (-1); 528 } 529 } 530 (void)Fclose(of); 531 printf("%d/%ld\n", lc, cc); 532 (void)fflush(stdout); 533 return (0); 534 } 535 536 /* 537 * Edit the message being collected on fp. 538 * On return, make the edit file the new temp file. 539 */ 540 void 541 mesedit(FILE *fp, int c) 542 { 543 sig_t sigint = signal(SIGINT, SIG_IGN); 544 FILE *nf = run_editor(fp, (off_t)-1, c, 0); 545 546 if (nf != NULL) { 547 (void)fseeko(nf, (off_t)0, SEEK_END); 548 collf = nf; 549 (void)Fclose(fp); 550 } 551 (void)signal(SIGINT, sigint); 552 } 553 554 /* 555 * Pipe the message through the command. 556 * Old message is on stdin of command; 557 * New message collected from stdout. 558 * Sh -c must return 0 to accept the new message. 559 */ 560 void 561 mespipe(FILE *fp, char cmd[]) 562 { 563 FILE *nf; 564 int fd; 565 sig_t sigint = signal(SIGINT, SIG_IGN); 566 char *sh, tempname[PATHSIZE]; 567 568 (void)snprintf(tempname, sizeof(tempname), 569 "%s/mail.ReXXXXXXXXXX", tmpdir); 570 if ((fd = mkstemp(tempname)) == -1 || 571 (nf = Fdopen(fd, "w+")) == NULL) { 572 warn("%s", tempname); 573 goto out; 574 } 575 (void)rm(tempname); 576 /* 577 * stdin = current message. 578 * stdout = new message. 579 */ 580 if ((sh = value("SHELL")) == NULL) 581 sh = _PATH_CSHELL; 582 if (run_command(sh, 583 0, fileno(fp), fileno(nf), "-c", cmd, NULL) < 0) { 584 (void)Fclose(nf); 585 goto out; 586 } 587 if (fsize(nf) == 0) { 588 fprintf(stderr, "No bytes from \"%s\" !?\n", cmd); 589 (void)Fclose(nf); 590 goto out; 591 } 592 /* 593 * Take new files. 594 */ 595 (void)fseeko(nf, (off_t)0, SEEK_END); 596 collf = nf; 597 (void)Fclose(fp); 598 out: 599 (void)signal(SIGINT, sigint); 600 } 601 602 /* 603 * Interpolate the named messages into the current 604 * message, preceding each line with a tab. 605 * Return a count of the number of characters now in 606 * the message, or -1 if an error is encountered writing 607 * the message temporary. The flag argument is 'm' if we 608 * should shift over and 'f' if not. 609 */ 610 int 611 forward(char ms[], FILE *fp, char *fn, int f) 612 { 613 int *msgvec; 614 struct ignoretab *ig; 615 char *tabst; 616 617 msgvec = (int *)salloc((msgCount+1) * sizeof(*msgvec)); 618 if (msgvec == NULL) 619 return (0); 620 if (getmsglist(ms, msgvec, 0) < 0) 621 return (0); 622 if (*msgvec == 0) { 623 *msgvec = first(0, MMNORM); 624 if (*msgvec == 0) { 625 printf("No appropriate messages\n"); 626 return (0); 627 } 628 msgvec[1] = 0; 629 } 630 if (f == 'f' || f == 'F') 631 tabst = NULL; 632 else if ((tabst = value("indentprefix")) == NULL) 633 tabst = "\t"; 634 ig = isupper((unsigned char)f) ? NULL : ignore; 635 printf("Interpolating:"); 636 for (; *msgvec != 0; msgvec++) { 637 struct message *mp = message + *msgvec - 1; 638 639 touch(mp); 640 printf(" %d", *msgvec); 641 if (sendmessage(mp, fp, ig, tabst) < 0) { 642 warnx("%s", fn); 643 return (-1); 644 } 645 } 646 printf("\n"); 647 return (0); 648 } 649 650 /* 651 * Print (continue) when continued after ^Z. 652 */ 653 /*ARGSUSED*/ 654 void 655 collstop(int s) 656 { 657 sig_t old_action = signal(s, SIG_DFL); 658 sigset_t nset; 659 660 (void)sigemptyset(&nset); 661 (void)sigaddset(&nset, s); 662 (void)sigprocmask(SIG_UNBLOCK, &nset, NULL); 663 (void)kill(0, s); 664 (void)sigprocmask(SIG_BLOCK, &nset, NULL); 665 (void)signal(s, old_action); 666 if (colljmp_p) { 667 colljmp_p = 0; 668 hadintr = 0; 669 longjmp(colljmp, 1); 670 } 671 } 672 673 /* 674 * On interrupt, come here to save the partial message in ~/dead.letter. 675 * Then jump out of the collection loop. 676 */ 677 /*ARGSUSED*/ 678 void 679 collint(int s __unused) 680 { 681 /* 682 * the control flow is subtle, because we can be called from ~q. 683 */ 684 if (!hadintr) { 685 if (value("ignore") != NULL) { 686 printf("@"); 687 (void)fflush(stdout); 688 clearerr(stdin); 689 return; 690 } 691 hadintr = 1; 692 longjmp(colljmp, 1); 693 } 694 rewind(collf); 695 if (value("nosave") == NULL) 696 savedeadletter(collf); 697 longjmp(collabort, 1); 698 } 699 700 /*ARGSUSED*/ 701 void 702 collhup(int s __unused) 703 { 704 rewind(collf); 705 savedeadletter(collf); 706 /* 707 * Let's pretend nobody else wants to clean up, 708 * a true statement at this time. 709 */ 710 exit(1); 711 } 712 713 void 714 savedeadletter(FILE *fp) 715 { 716 FILE *dbuf; 717 int c; 718 char *cp; 719 720 if (fsize(fp) == 0) 721 return; 722 cp = getdeadletter(); 723 c = umask(077); 724 dbuf = Fopen(cp, "a"); 725 (void)umask(c); 726 if (dbuf == NULL) 727 return; 728 while ((c = getc(fp)) != EOF) 729 (void)putc(c, dbuf); 730 (void)Fclose(dbuf); 731 rewind(fp); 732 } 733