1 /* $NetBSD: collect.c,v 1.20 2000/02/10 12:34:43 tron Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)collect.c 8.2 (Berkeley) 4/19/94"; 40 #else 41 __RCSID("$NetBSD: collect.c,v 1.20 2000/02/10 12:34:43 tron Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 /* 46 * Mail -- a mail program 47 * 48 * Collect input from standard input, handling 49 * ~ escapes. 50 */ 51 52 #include "rcv.h" 53 #include "extern.h" 54 55 /* 56 * Read a message from standard output and return a read file to it 57 * or NULL on error. 58 */ 59 60 /* 61 * The following hokiness with global variables is so that on 62 * receipt of an interrupt signal, the partial message can be salted 63 * away on dead.letter. 64 */ 65 66 static sig_t saveint; /* Previous SIGINT value */ 67 static sig_t savehup; /* Previous SIGHUP value */ 68 static sig_t savetstp; /* Previous SIGTSTP value */ 69 static sig_t savettou; /* Previous SIGTTOU value */ 70 static sig_t savettin; /* Previous SIGTTIN value */ 71 static FILE *collf; /* File for saving away */ 72 static int hadintr; /* Have seen one SIGINT so far */ 73 74 static jmp_buf colljmp; /* To get back to work */ 75 static int colljmp_p; /* whether to long jump */ 76 static jmp_buf collabort; /* To end collection with error */ 77 78 FILE * 79 collect(hp, printheaders) 80 struct header *hp; 81 int printheaders; 82 { 83 FILE *fbuf; 84 int lc, cc, escape, eofcount; 85 int c, t; 86 char linebuf[LINESIZE], *cp; 87 extern char *tempMail; 88 char getsub; 89 sigset_t nset; 90 int longline, lastlong, rc; /* So we don't make 2 or more lines 91 out of a long input line. */ 92 #if __GNUC__ 93 /* Avoid longjmp clobbering */ 94 (void) &escape; 95 (void) &eofcount; 96 (void) &getsub; 97 (void) &longline; 98 #endif 99 100 collf = NULL; 101 /* 102 * Start catching signals from here, but we're still die on interrupts 103 * until we're in the main loop. 104 */ 105 sigemptyset(&nset); 106 sigaddset(&nset, SIGINT); 107 sigaddset(&nset, SIGHUP); 108 sigprocmask(SIG_BLOCK, &nset, NULL); 109 if ((saveint = signal(SIGINT, SIG_IGN)) != SIG_IGN) 110 signal(SIGINT, collint); 111 if ((savehup = signal(SIGHUP, SIG_IGN)) != SIG_IGN) 112 signal(SIGHUP, collhup); 113 savetstp = signal(SIGTSTP, collstop); 114 savettou = signal(SIGTTOU, collstop); 115 savettin = signal(SIGTTIN, collstop); 116 if (setjmp(collabort) || setjmp(colljmp)) { 117 rm(tempMail); 118 goto err; 119 } 120 sigprocmask(SIG_UNBLOCK, &nset, NULL); 121 122 noreset++; 123 if ((collf = Fopen(tempMail, "w+")) == NULL) { 124 perror(tempMail); 125 goto err; 126 } 127 unlink(tempMail); 128 129 /* 130 * If we are going to prompt for a subject, 131 * refrain from printing a newline after 132 * the headers (since some people mind). 133 */ 134 t = GTO|GSUBJECT|GCC|GNL; 135 getsub = 0; 136 if (hp->h_subject == NOSTR && value("interactive") != NOSTR && 137 (value("ask") != NOSTR || value("asksub") != NOSTR)) 138 t &= ~GNL, getsub++; 139 if (printheaders) { 140 puthead(hp, stdout, t); 141 fflush(stdout); 142 } 143 if ((cp = value("escape")) != NOSTR) 144 escape = *cp; 145 else 146 escape = ESCAPE; 147 eofcount = 0; 148 hadintr = 0; 149 lastlong = 0; 150 longline = 0; 151 152 if (!setjmp(colljmp)) { 153 if (getsub) 154 grabh(hp, GSUBJECT); 155 } else { 156 /* 157 * Come here for printing the after-signal message. 158 * Duplicate messages won't be printed because 159 * the write is aborted if we get a SIGTTOU. 160 */ 161 cont: 162 if (hadintr) { 163 fflush(stdout); 164 fprintf(stderr, 165 "\n(Interrupt -- one more to kill letter)\n"); 166 } else { 167 printf("(continue)\n"); 168 fflush(stdout); 169 } 170 } 171 for (;;) { 172 colljmp_p = 1; 173 c = readline(stdin, linebuf, LINESIZE); 174 colljmp_p = 0; 175 if (c < 0) { 176 if (value("interactive") != NOSTR && 177 value("ignoreeof") != NOSTR && ++eofcount < 25) { 178 printf("Use \".\" to terminate letter\n"); 179 continue; 180 } 181 break; 182 } 183 lastlong = longline; 184 longline = c == LINESIZE-1; 185 eofcount = 0; 186 hadintr = 0; 187 if (linebuf[0] == '.' && linebuf[1] == '\0' && 188 value("interactive") != NOSTR && !lastlong && 189 (value("dot") != NOSTR || value("ignoreeof") != NOSTR)) 190 break; 191 if (linebuf[0] != escape || value("interactive") == NOSTR || 192 lastlong) { 193 if (putline(collf, linebuf, !longline) < 0) 194 goto err; 195 continue; 196 } 197 c = linebuf[1]; 198 switch (c) { 199 default: 200 /* 201 * On double escape, just send the single one. 202 * Otherwise, it's an error. 203 */ 204 if (c == escape) { 205 if (putline(collf, &linebuf[1], !longline) < 0) 206 goto err; 207 else 208 break; 209 } 210 printf("Unknown tilde escape.\n"); 211 break; 212 case 'C': 213 /* 214 * Dump core. 215 */ 216 core(NULL); 217 break; 218 case '!': 219 /* 220 * Shell escape, send the balance of the 221 * line to sh -c. 222 */ 223 shell(&linebuf[2]); 224 break; 225 case ':': 226 case '_': 227 /* 228 * Escape to command mode, but be nice! 229 */ 230 execute(&linebuf[2], 1); 231 goto cont; 232 case '.': 233 /* 234 * Simulate end of file on input. 235 */ 236 goto out; 237 case 'q': 238 /* 239 * Force a quit of sending mail. 240 * Act like an interrupt happened. 241 */ 242 hadintr++; 243 collint(SIGINT); 244 exit(1); 245 246 case 'x': /* exit, do not save in dead.letter */ 247 goto err; 248 249 case 'h': 250 /* 251 * Grab a bunch of headers. 252 */ 253 grabh(hp, GTO|GSUBJECT|GCC|GBCC); 254 goto cont; 255 case 't': 256 /* 257 * Add to the To list. 258 */ 259 hp->h_to = cat(hp->h_to, extract(&linebuf[2], GTO)); 260 break; 261 case 's': 262 /* 263 * Set the Subject list. 264 */ 265 cp = &linebuf[2]; 266 while (isspace((unsigned char)*cp)) 267 cp++; 268 hp->h_subject = savestr(cp); 269 break; 270 case 'c': 271 /* 272 * Add to the CC list. 273 */ 274 hp->h_cc = cat(hp->h_cc, extract(&linebuf[2], GCC)); 275 break; 276 case 'b': 277 /* 278 * Add stuff to blind carbon copies list. 279 */ 280 hp->h_bcc = cat(hp->h_bcc, extract(&linebuf[2], GBCC)); 281 break; 282 case 'i': 283 case 'A': 284 case 'a': 285 /* 286 * Insert named variable in message 287 */ 288 289 switch(c) { 290 case 'i': 291 cp = &linebuf[2]; 292 while(isspace((unsigned char) *cp)) 293 cp++; 294 295 break; 296 case 'a': 297 cp = "sign"; 298 break; 299 case 'A': 300 cp = "Sign"; 301 break; 302 default: 303 goto err; 304 } 305 306 if(*cp && (cp = value(cp)) != NOSTR) { 307 printf("%s\n", cp); 308 if(putline(collf, cp, 1) < 0) 309 goto err; 310 } 311 312 break; 313 314 case 'd': 315 strcpy(linebuf + 2, getdeadletter()); 316 /* fall into . . . */ 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 } 331 332 cp = expand(cp); 333 if (cp == NOSTR) 334 break; 335 336 if (*cp == '!') { /* insert stdout of command */ 337 extern char *tempEdit; 338 char *shell; 339 int nullfd; 340 int rc; 341 342 if((nullfd = open("/dev/null", O_RDONLY, 0)) == -1) { 343 perror("/dev/null"); 344 break; 345 } 346 347 if ((fbuf = Fopen(tempEdit, "w+")) == NULL) { 348 perror(tempEdit); 349 break; 350 } 351 (void) unlink(tempEdit); 352 353 if ((shell = value("SHELL")) == NOSTR) 354 shell = _PATH_CSHELL; 355 356 rc = run_command(shell, 0, nullfd, fileno(fbuf), "-c", cp+1, NOSTR); 357 358 close(nullfd); 359 360 if (rc < 0) { 361 (void) Fclose(fbuf); 362 break; 363 } 364 365 if (fsize(fbuf) == 0) { 366 fprintf(stderr, "No bytes from command \"%s\"\n", cp+1); 367 (void) Fclose(fbuf); 368 break; 369 } 370 371 rewind(fbuf); 372 } 373 else if (isdir(cp)) { 374 printf("%s: Directory\n", cp); 375 break; 376 } 377 else if ((fbuf = Fopen(cp, "r")) == NULL) { 378 perror(cp); 379 break; 380 } 381 printf("\"%s\" ", cp); 382 fflush(stdout); 383 lc = 0; 384 cc = 0; 385 while ((rc = readline(fbuf, linebuf, LINESIZE)) >= 0) { 386 if (rc != LINESIZE-1) lc++; 387 if ((t = putline(collf, linebuf, 388 rc != LINESIZE-1)) < 0) { 389 Fclose(fbuf); 390 goto err; 391 } 392 cc += t; 393 } 394 Fclose(fbuf); 395 printf("%d/%d\n", lc, cc); 396 break; 397 case 'w': 398 /* 399 * Write the message on a file. 400 */ 401 cp = &linebuf[2]; 402 while (*cp == ' ' || *cp == '\t') 403 cp++; 404 if (*cp == '\0') { 405 fprintf(stderr, "Write what file!?\n"); 406 break; 407 } 408 if ((cp = expand(cp)) == NOSTR) 409 break; 410 rewind(collf); 411 exwrite(cp, collf, 1); 412 break; 413 case 'm': 414 case 'M': 415 case 'f': 416 case 'F': 417 /* 418 * Interpolate the named messages, if we 419 * are in receiving mail mode. Does the 420 * standard list processing garbage. 421 * If ~f is given, we don't shift over. 422 */ 423 if (forward(linebuf + 2, collf, c) < 0) 424 goto err; 425 goto cont; 426 case '?': 427 if ((fbuf = Fopen(_PATH_TILDE, "r")) == NULL) { 428 perror(_PATH_TILDE); 429 break; 430 } 431 while ((t = getc(fbuf)) != EOF) 432 (void) putchar(t); 433 Fclose(fbuf); 434 break; 435 case 'p': 436 /* 437 * Print out the current state of the 438 * message without altering anything. 439 */ 440 rewind(collf); 441 printf("-------\nMessage contains:\n"); 442 puthead(hp, stdout, GTO|GSUBJECT|GCC|GBCC|GNL); 443 while ((t = getc(collf)) != EOF) 444 (void) putchar(t); 445 goto cont; 446 case '|': 447 /* 448 * Pipe message through command. 449 * Collect output as new message. 450 */ 451 rewind(collf); 452 mespipe(collf, &linebuf[2]); 453 goto cont; 454 case 'v': 455 case 'e': 456 /* 457 * Edit the current message. 458 * 'e' means to use EDITOR 459 * 'v' means to use VISUAL 460 */ 461 rewind(collf); 462 mesedit(collf, c); 463 goto cont; 464 } 465 } 466 goto out; 467 err: 468 if (collf != NULL) { 469 Fclose(collf); 470 collf = NULL; 471 } 472 out: 473 if (collf != NULL) 474 rewind(collf); 475 noreset--; 476 sigprocmask(SIG_BLOCK, &nset, NULL); 477 signal(SIGINT, saveint); 478 signal(SIGHUP, savehup); 479 signal(SIGTSTP, savetstp); 480 signal(SIGTTOU, savettou); 481 signal(SIGTTIN, savettin); 482 sigprocmask(SIG_UNBLOCK, &nset, NULL); 483 return collf; 484 } 485 486 /* 487 * Write a file, ex-like if f set. 488 */ 489 int 490 exwrite(name, fp, f) 491 char name[]; 492 FILE *fp; 493 int f; 494 { 495 FILE *of; 496 int c; 497 long cc; 498 int lc; 499 struct stat junk; 500 501 if (f) { 502 printf("\"%s\" ", name); 503 fflush(stdout); 504 } 505 if (stat(name, &junk) >= 0 && S_ISREG(junk.st_mode)) { 506 if (!f) 507 fprintf(stderr, "%s: ", name); 508 fprintf(stderr, "File exists\n"); 509 return(-1); 510 } 511 if ((of = Fopen(name, "w")) == NULL) { 512 perror(name); 513 return(-1); 514 } 515 lc = 0; 516 cc = 0; 517 while ((c = getc(fp)) != EOF) { 518 cc++; 519 if (c == '\n') 520 lc++; 521 (void) putc(c, of); 522 if (ferror(of)) { 523 perror(name); 524 Fclose(of); 525 return(-1); 526 } 527 } 528 Fclose(of); 529 printf("%d/%ld\n", lc, cc); 530 fflush(stdout); 531 return(0); 532 } 533 534 /* 535 * Edit the message being collected on fp. 536 * On return, make the edit file the new temp file. 537 */ 538 void 539 mesedit(fp, c) 540 FILE *fp; 541 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 fseek(nf, 0L, 2); 548 collf = nf; 549 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(fp, cmd) 562 FILE *fp; 563 char cmd[]; 564 { 565 FILE *nf; 566 sig_t sigint = signal(SIGINT, SIG_IGN); 567 extern char *tempEdit; 568 char *shell; 569 570 if ((nf = Fopen(tempEdit, "w+")) == NULL) { 571 perror(tempEdit); 572 goto out; 573 } 574 (void) unlink(tempEdit); 575 /* 576 * stdin = current message. 577 * stdout = new message. 578 */ 579 if ((shell = value("SHELL")) == NOSTR) 580 shell = _PATH_CSHELL; 581 if (run_command(shell, 582 0, fileno(fp), fileno(nf), "-c", cmd, NOSTR) < 0) { 583 (void) Fclose(nf); 584 goto out; 585 } 586 if (fsize(nf) == 0) { 587 fprintf(stderr, "No bytes from \"%s\" !?\n", cmd); 588 (void) Fclose(nf); 589 goto out; 590 } 591 /* 592 * Take new files. 593 */ 594 (void) fseek(nf, 0L, 2); 595 collf = nf; 596 (void) Fclose(fp); 597 out: 598 (void) signal(SIGINT, sigint); 599 } 600 601 /* 602 * Interpolate the named messages into the current 603 * message, preceding each line with a tab. 604 * Return a count of the number of characters now in 605 * the message, or -1 if an error is encountered writing 606 * the message temporary. The flag argument is 'm' if we 607 * should shift over and 'f' if not. 608 */ 609 int 610 forward(ms, fp, f) 611 char ms[]; 612 FILE *fp; 613 int f; 614 { 615 int *msgvec; 616 extern char *tempMail; 617 struct ignoretab *ig; 618 char *tabst; 619 620 msgvec = (int *) salloc((msgCount+1) * sizeof *msgvec); 621 if (msgvec == (int *) NOSTR) 622 return(0); 623 if (getmsglist(ms, msgvec, 0) < 0) 624 return(0); 625 if (*msgvec == 0) { 626 *msgvec = first(0, MMNORM); 627 if (*msgvec == 0) { 628 printf("No appropriate messages\n"); 629 return(0); 630 } 631 msgvec[1] = 0; 632 } 633 if (f == 'f' || f == 'F') 634 tabst = NOSTR; 635 else if ((tabst = value("indentprefix")) == NOSTR) 636 tabst = "\t"; 637 ig = isupper(f) ? NULL : ignore; 638 printf("Interpolating:"); 639 for (; *msgvec != 0; msgvec++) { 640 struct message *mp = message + *msgvec - 1; 641 642 touch(mp); 643 printf(" %d", *msgvec); 644 if (sendmessage(mp, fp, ig, tabst) < 0) { 645 perror(tempMail); 646 return(-1); 647 } 648 } 649 printf("\n"); 650 return(0); 651 } 652 653 /* 654 * Print (continue) when continued after ^Z. 655 */ 656 /*ARGSUSED*/ 657 void 658 collstop(s) 659 int s; 660 { 661 sig_t old_action = signal(s, SIG_DFL); 662 sigset_t nset; 663 664 sigemptyset(&nset); 665 sigaddset(&nset, s); 666 sigprocmask(SIG_UNBLOCK, &nset, NULL); 667 kill(0, s); 668 sigprocmask(SIG_BLOCK, &nset, NULL); 669 signal(s, old_action); 670 if (colljmp_p) { 671 colljmp_p = 0; 672 hadintr = 0; 673 longjmp(colljmp, 1); 674 } 675 } 676 677 /* 678 * On interrupt, come here to save the partial message in ~/dead.letter. 679 * Then jump out of the collection loop. 680 */ 681 /*ARGSUSED*/ 682 void 683 collint(s) 684 int s; 685 { 686 /* 687 * the control flow is subtle, because we can be called from ~q. 688 */ 689 if (!hadintr) { 690 if (value("ignore") != NOSTR) { 691 puts("@"); 692 fflush(stdout); 693 clearerr(stdin); 694 return; 695 } 696 hadintr = 1; 697 longjmp(colljmp, 1); 698 } 699 rewind(collf); 700 if (value("nosave") == NOSTR) 701 savedeadletter(collf); 702 longjmp(collabort, 1); 703 } 704 705 /*ARGSUSED*/ 706 void 707 collhup(s) 708 int s; 709 { 710 rewind(collf); 711 savedeadletter(collf); 712 /* 713 * Let's pretend nobody else wants to clean up, 714 * a true statement at this time. 715 */ 716 exit(1); 717 } 718 719 void 720 savedeadletter(fp) 721 FILE *fp; 722 { 723 FILE *dbuf; 724 int c; 725 char *cp; 726 727 if (fsize(fp) == 0) 728 return; 729 cp = getdeadletter(); 730 c = umask(077); 731 dbuf = Fopen(cp, "a"); 732 (void) umask(c); 733 if (dbuf == NULL) 734 return; 735 while ((c = getc(fp)) != EOF) 736 (void) putc(c, dbuf); 737 Fclose(dbuf); 738 rewind(fp); 739 } 740