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