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 static char sccsid[] = "@(#)collect.c 8.2 (Berkeley) 4/19/94"; 36 #endif /* not lint */ 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 "extern.h" 47 48 /* 49 * Read a message from standard output and return a read file to it 50 * or NULL on error. 51 */ 52 53 /* 54 * The following hokiness with global variables is so that on 55 * receipt of an interrupt signal, the partial message can be salted 56 * away on dead.letter. 57 */ 58 59 static sig_t saveint; /* Previous SIGINT value */ 60 static sig_t savehup; /* Previous SIGHUP value */ 61 static sig_t savetstp; /* Previous SIGTSTP value */ 62 static sig_t savettou; /* Previous SIGTTOU value */ 63 static sig_t savettin; /* Previous SIGTTIN value */ 64 static FILE *collf; /* File for saving away */ 65 static int hadintr; /* Have seen one SIGINT so far */ 66 67 static jmp_buf colljmp; /* To get back to work */ 68 static int colljmp_p; /* whether to long jump */ 69 static jmp_buf collabort; /* To end collection with error */ 70 71 FILE * 72 collect(hp, printheaders) 73 struct header *hp; 74 int printheaders; 75 { 76 FILE *fbuf; 77 int lc, cc, escape, eofcount; 78 register int c, t; 79 char linebuf[LINESIZE], *cp; 80 extern char tempMail[]; 81 char getsub; 82 int omask; 83 void collint(), collhup(), collstop(); 84 85 collf = NULL; 86 /* 87 * Start catching signals from here, but we're still die on interrupts 88 * until we're in the main loop. 89 */ 90 omask = sigblock(sigmask(SIGINT) | sigmask(SIGHUP)); 91 if ((saveint = signal(SIGINT, SIG_IGN)) != SIG_IGN) 92 signal(SIGINT, collint); 93 if ((savehup = signal(SIGHUP, SIG_IGN)) != SIG_IGN) 94 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 rm(tempMail); 100 goto err; 101 } 102 sigsetmask(omask & ~(sigmask(SIGINT) | sigmask(SIGHUP))); 103 104 noreset++; 105 if ((collf = Fopen(tempMail, "w+")) == NULL) { 106 perror(tempMail); 107 goto err; 108 } 109 unlink(tempMail); 110 111 /* 112 * If we are going to prompt for a subject, 113 * refrain from printing a newline after 114 * the headers (since some people mind). 115 */ 116 t = GTO|GSUBJECT|GCC|GNL; 117 getsub = 0; 118 if (hp->h_subject == NOSTR && value("interactive") != NOSTR && 119 (value("ask") != NOSTR || value("asksub") != NOSTR)) 120 t &= ~GNL, getsub++; 121 if (printheaders) { 122 puthead(hp, stdout, t); 123 fflush(stdout); 124 } 125 if ((cp = value("escape")) != NOSTR) 126 escape = *cp; 127 else 128 escape = ESCAPE; 129 eofcount = 0; 130 hadintr = 0; 131 132 if (!setjmp(colljmp)) { 133 if (getsub) 134 grabh(hp, GSUBJECT); 135 } else { 136 /* 137 * Come here for printing the after-signal message. 138 * Duplicate messages won't be printed because 139 * the write is aborted if we get a SIGTTOU. 140 */ 141 cont: 142 if (hadintr) { 143 fflush(stdout); 144 fprintf(stderr, 145 "\n(Interrupt -- one more to kill letter)\n"); 146 } else { 147 printf("(continue)\n"); 148 fflush(stdout); 149 } 150 } 151 for (;;) { 152 colljmp_p = 1; 153 c = readline(stdin, linebuf, LINESIZE); 154 colljmp_p = 0; 155 if (c < 0) { 156 if (value("interactive") != NOSTR && 157 value("ignoreeof") != NOSTR && ++eofcount < 25) { 158 printf("Use \".\" to terminate letter\n"); 159 continue; 160 } 161 break; 162 } 163 eofcount = 0; 164 hadintr = 0; 165 if (linebuf[0] == '.' && linebuf[1] == '\0' && 166 value("interactive") != NOSTR && 167 (value("dot") != NOSTR || value("ignoreeof") != NOSTR)) 168 break; 169 if (linebuf[0] != escape || value("interactive") == NOSTR) { 170 if (putline(collf, linebuf) < 0) 171 goto err; 172 continue; 173 } 174 c = linebuf[1]; 175 switch (c) { 176 default: 177 /* 178 * On double escape, just send the single one. 179 * Otherwise, it's an error. 180 */ 181 if (c == escape) { 182 if (putline(collf, &linebuf[1]) < 0) 183 goto err; 184 else 185 break; 186 } 187 printf("Unknown tilde escape.\n"); 188 break; 189 case 'C': 190 /* 191 * Dump core. 192 */ 193 core(); 194 break; 195 case '!': 196 /* 197 * Shell escape, send the balance of the 198 * line to sh -c. 199 */ 200 shell(&linebuf[2]); 201 break; 202 case ':': 203 /* 204 * Escape to command mode, but be nice! 205 */ 206 execute(&linebuf[2], 1); 207 goto cont; 208 case '.': 209 /* 210 * Simulate end of file on input. 211 */ 212 goto out; 213 case 'q': 214 /* 215 * Force a quit of sending mail. 216 * Act like an interrupt happened. 217 */ 218 hadintr++; 219 collint(SIGINT); 220 exit(1); 221 case 'h': 222 /* 223 * Grab a bunch of headers. 224 */ 225 grabh(hp, GTO|GSUBJECT|GCC|GBCC); 226 goto cont; 227 case 't': 228 /* 229 * Add to the To list. 230 */ 231 hp->h_to = cat(hp->h_to, extract(&linebuf[2], GTO)); 232 break; 233 case 's': 234 /* 235 * Set the Subject line. 236 */ 237 cp = &linebuf[2]; 238 while (isspace(*cp)) 239 cp++; 240 hp->h_subject = savestr(cp); 241 break; 242 case 'R': 243 /* 244 * Set the Reply-To line. 245 */ 246 cp = &linebuf[2]; 247 while (isspace(*cp)) 248 cp++; 249 hp->h_replyto = savestr(cp); 250 break; 251 case 'c': 252 /* 253 * Add to the CC list. 254 */ 255 hp->h_cc = cat(hp->h_cc, extract(&linebuf[2], GCC)); 256 break; 257 case 'b': 258 /* 259 * Add stuff to blind carbon copies list. 260 */ 261 hp->h_bcc = cat(hp->h_bcc, extract(&linebuf[2], GBCC)); 262 break; 263 case 'd': 264 strcpy(linebuf + 2, getdeadletter()); 265 /* fall into . . . */ 266 case 'r': 267 /* 268 * Invoke a file: 269 * Search for the file name, 270 * then open it and copy the contents to collf. 271 */ 272 cp = &linebuf[2]; 273 while (isspace(*cp)) 274 cp++; 275 if (*cp == '\0') { 276 printf("Interpolate what file?\n"); 277 break; 278 } 279 cp = expand(cp); 280 if (cp == NOSTR) 281 break; 282 if (isdir(cp)) { 283 printf("%s: Directory\n", cp); 284 break; 285 } 286 if ((fbuf = Fopen(cp, "r")) == NULL) { 287 perror(cp); 288 break; 289 } 290 printf("\"%s\" ", cp); 291 fflush(stdout); 292 lc = 0; 293 cc = 0; 294 while (readline(fbuf, linebuf, LINESIZE) >= 0) { 295 lc++; 296 if ((t = putline(collf, linebuf)) < 0) { 297 Fclose(fbuf); 298 goto err; 299 } 300 cc += t; 301 } 302 Fclose(fbuf); 303 printf("%d/%d\n", lc, cc); 304 break; 305 case 'w': 306 /* 307 * Write the message on a file. 308 */ 309 cp = &linebuf[2]; 310 while (*cp == ' ' || *cp == '\t') 311 cp++; 312 if (*cp == '\0') { 313 fprintf(stderr, "Write what file!?\n"); 314 break; 315 } 316 if ((cp = expand(cp)) == NOSTR) 317 break; 318 rewind(collf); 319 exwrite(cp, collf, 1); 320 break; 321 case 'm': 322 case 'M': 323 case 'f': 324 case 'F': 325 /* 326 * Interpolate the named messages, if we 327 * are in receiving mail mode. Does the 328 * standard list processing garbage. 329 * If ~f is given, we don't shift over. 330 */ 331 if (forward(linebuf + 2, collf, c) < 0) 332 goto err; 333 goto cont; 334 case '?': 335 if ((fbuf = Fopen(_PATH_TILDE, "r")) == NULL) { 336 perror(_PATH_TILDE); 337 break; 338 } 339 while ((t = getc(fbuf)) != EOF) 340 (void) putchar(t); 341 Fclose(fbuf); 342 break; 343 case 'p': 344 /* 345 * Print out the current state of the 346 * message without altering anything. 347 */ 348 rewind(collf); 349 printf("-------\nMessage contains:\n"); 350 puthead(hp, stdout, GTO|GSUBJECT|GCC|GBCC|GNL); 351 while ((t = getc(collf)) != EOF) 352 (void) putchar(t); 353 goto cont; 354 case '|': 355 /* 356 * Pipe message through command. 357 * Collect output as new message. 358 */ 359 rewind(collf); 360 mespipe(collf, &linebuf[2]); 361 goto cont; 362 case 'v': 363 case 'e': 364 /* 365 * Edit the current message. 366 * 'e' means to use EDITOR 367 * 'v' means to use VISUAL 368 */ 369 rewind(collf); 370 mesedit(collf, c); 371 goto cont; 372 } 373 } 374 goto out; 375 err: 376 if (collf != NULL) { 377 Fclose(collf); 378 collf = NULL; 379 } 380 out: 381 if (collf != NULL) 382 rewind(collf); 383 noreset--; 384 sigblock(sigmask(SIGINT) | sigmask(SIGHUP)); 385 signal(SIGINT, saveint); 386 signal(SIGHUP, savehup); 387 signal(SIGTSTP, savetstp); 388 signal(SIGTTOU, savettou); 389 signal(SIGTTIN, savettin); 390 sigsetmask(omask); 391 return collf; 392 } 393 394 /* 395 * Write a file, ex-like if f set. 396 */ 397 int 398 exwrite(name, fp, f) 399 char name[]; 400 FILE *fp; 401 int f; 402 { 403 register FILE *of; 404 register int c; 405 long cc; 406 int lc; 407 struct stat junk; 408 409 if (f) { 410 printf("\"%s\" ", name); 411 fflush(stdout); 412 } 413 if (stat(name, &junk) >= 0 && (junk.st_mode & S_IFMT) == S_IFREG) { 414 if (!f) 415 fprintf(stderr, "%s: ", name); 416 fprintf(stderr, "File exists\n"); 417 return(-1); 418 } 419 if ((of = Fopen(name, "w")) == NULL) { 420 perror(NOSTR); 421 return(-1); 422 } 423 lc = 0; 424 cc = 0; 425 while ((c = getc(fp)) != EOF) { 426 cc++; 427 if (c == '\n') 428 lc++; 429 (void) putc(c, of); 430 if (ferror(of)) { 431 perror(name); 432 Fclose(of); 433 return(-1); 434 } 435 } 436 Fclose(of); 437 printf("%d/%ld\n", lc, cc); 438 fflush(stdout); 439 return(0); 440 } 441 442 /* 443 * Edit the message being collected on fp. 444 * On return, make the edit file the new temp file. 445 */ 446 void 447 mesedit(fp, c) 448 FILE *fp; 449 int c; 450 { 451 sig_t sigint = signal(SIGINT, SIG_IGN); 452 FILE *nf = run_editor(fp, (off_t)-1, c, 0); 453 454 if (nf != NULL) { 455 fseek(nf, 0L, 2); 456 collf = nf; 457 Fclose(fp); 458 } 459 (void) signal(SIGINT, sigint); 460 } 461 462 /* 463 * Pipe the message through the command. 464 * Old message is on stdin of command; 465 * New message collected from stdout. 466 * Sh -c must return 0 to accept the new message. 467 */ 468 void 469 mespipe(fp, cmd) 470 FILE *fp; 471 char cmd[]; 472 { 473 FILE *nf; 474 sig_t sigint = signal(SIGINT, SIG_IGN); 475 extern char tempEdit[]; 476 char *shell; 477 478 if ((nf = Fopen(tempEdit, "w+")) == NULL) { 479 perror(tempEdit); 480 goto out; 481 } 482 (void) unlink(tempEdit); 483 /* 484 * stdin = current message. 485 * stdout = new message. 486 */ 487 if ((shell = value("SHELL")) == NOSTR) 488 shell = _PATH_CSHELL; 489 if (run_command(shell, 490 0, fileno(fp), fileno(nf), "-c", cmd, NOSTR) < 0) { 491 (void) Fclose(nf); 492 goto out; 493 } 494 if (fsize(nf) == 0) { 495 fprintf(stderr, "No bytes from \"%s\" !?\n", cmd); 496 (void) Fclose(nf); 497 goto out; 498 } 499 /* 500 * Take new files. 501 */ 502 (void) fseek(nf, 0L, 2); 503 collf = nf; 504 (void) Fclose(fp); 505 out: 506 (void) signal(SIGINT, sigint); 507 } 508 509 /* 510 * Interpolate the named messages into the current 511 * message, preceding each line with a tab. 512 * Return a count of the number of characters now in 513 * the message, or -1 if an error is encountered writing 514 * the message temporary. The flag argument is 'm' if we 515 * should shift over and 'f' if not. 516 */ 517 int 518 forward(ms, fp, f) 519 char ms[]; 520 FILE *fp; 521 int f; 522 { 523 register int *msgvec; 524 extern char tempMail[]; 525 struct ignoretab *ig; 526 char *tabst; 527 528 msgvec = (int *) salloc((msgCount+1) * sizeof *msgvec); 529 if (msgvec == (int *) NOSTR) 530 return(0); 531 if (getmsglist(ms, msgvec, 0) < 0) 532 return(0); 533 if (*msgvec == 0) { 534 *msgvec = first(0, MMNORM); 535 if (*msgvec == 0) { 536 printf("No appropriate messages\n"); 537 return(0); 538 } 539 msgvec[1] = 0; 540 } 541 if (f == 'f' || f == 'F') 542 tabst = NOSTR; 543 else if ((tabst = value("indentprefix")) == NOSTR) 544 tabst = "\t"; 545 ig = isupper(f) ? NULL : ignore; 546 printf("Interpolating:"); 547 for (; *msgvec != 0; msgvec++) { 548 struct message *mp = message + *msgvec - 1; 549 550 touch(mp); 551 printf(" %d", *msgvec); 552 if (send(mp, fp, ig, tabst) < 0) { 553 perror(tempMail); 554 return(-1); 555 } 556 } 557 printf("\n"); 558 return(0); 559 } 560 561 /* 562 * Print (continue) when continued after ^Z. 563 */ 564 /*ARGSUSED*/ 565 void 566 collstop(s) 567 int s; 568 { 569 sig_t old_action = signal(s, SIG_DFL); 570 571 sigsetmask(sigblock(0) & ~sigmask(s)); 572 kill(0, s); 573 sigblock(sigmask(s)); 574 signal(s, old_action); 575 if (colljmp_p) { 576 colljmp_p = 0; 577 hadintr = 0; 578 longjmp(colljmp, 1); 579 } 580 } 581 582 /* 583 * On interrupt, come here to save the partial message in ~/dead.letter. 584 * Then jump out of the collection loop. 585 */ 586 /*ARGSUSED*/ 587 void 588 collint(s) 589 int s; 590 { 591 /* 592 * the control flow is subtle, because we can be called from ~q. 593 */ 594 if (!hadintr) { 595 if (value("ignore") != NOSTR) { 596 puts("@"); 597 fflush(stdout); 598 clearerr(stdin); 599 return; 600 } 601 hadintr = 1; 602 longjmp(colljmp, 1); 603 } 604 rewind(collf); 605 if (value("nosave") == NOSTR) 606 savedeadletter(collf); 607 longjmp(collabort, 1); 608 } 609 610 /*ARGSUSED*/ 611 void 612 collhup(s) 613 int s; 614 { 615 rewind(collf); 616 savedeadletter(collf); 617 /* 618 * Let's pretend nobody else wants to clean up, 619 * a true statement at this time. 620 */ 621 exit(1); 622 } 623 624 void 625 savedeadletter(fp) 626 register FILE *fp; 627 { 628 register FILE *dbuf; 629 register int c; 630 char *cp; 631 632 if (fsize(fp) == 0) 633 return; 634 cp = getdeadletter(); 635 c = umask(077); 636 dbuf = Fopen(cp, "a"); 637 (void) umask(c); 638 if (dbuf == NULL) 639 return; 640 while ((c = getc(fp)) != EOF) 641 (void) putc(c, dbuf); 642 Fclose(dbuf); 643 rewind(fp); 644 } 645