1 /* 2 * Copyright (c) 1980 Regents of the University of California. 3 * 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[] = "from: @(#)collect.c 5.24 (Berkeley) 4/1/91";*/ 36 static char rcsid[] = "$Id: collect.c,v 1.2 1993/08/01 18:13:09 mycroft Exp $"; 37 #endif /* not lint */ 38 39 /* 40 * Mail -- a mail program 41 * 42 * Collect input from standard input, handling 43 * ~ escapes. 44 */ 45 46 #include "rcv.h" 47 #include <sys/stat.h> 48 49 /* 50 * Read a message from standard output 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(hp, printheaders) 74 struct header *hp; 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 list. 236 */ 237 cp = &linebuf[2]; 238 while (isspace(*cp)) 239 cp++; 240 hp->h_subject = savestr(cp); 241 break; 242 case 'c': 243 /* 244 * Add to the CC list. 245 */ 246 hp->h_cc = cat(hp->h_cc, extract(&linebuf[2], GCC)); 247 break; 248 case 'b': 249 /* 250 * Add stuff to blind carbon copies list. 251 */ 252 hp->h_bcc = cat(hp->h_bcc, extract(&linebuf[2], GBCC)); 253 break; 254 case 'd': 255 strcpy(linebuf + 2, getdeadletter()); 256 /* fall into . . . */ 257 case 'r': 258 /* 259 * Invoke a file: 260 * Search for the file name, 261 * then open it and copy the contents to collf. 262 */ 263 cp = &linebuf[2]; 264 while (isspace(*cp)) 265 cp++; 266 if (*cp == '\0') { 267 printf("Interpolate what file?\n"); 268 break; 269 } 270 cp = expand(cp); 271 if (cp == NOSTR) 272 break; 273 if (isdir(cp)) { 274 printf("%s: Directory\n", cp); 275 break; 276 } 277 if ((fbuf = Fopen(cp, "r")) == NULL) { 278 perror(cp); 279 break; 280 } 281 printf("\"%s\" ", cp); 282 fflush(stdout); 283 lc = 0; 284 cc = 0; 285 while (readline(fbuf, linebuf, LINESIZE) >= 0) { 286 lc++; 287 if ((t = putline(collf, linebuf)) < 0) { 288 Fclose(fbuf); 289 goto err; 290 } 291 cc += t; 292 } 293 Fclose(fbuf); 294 printf("%d/%d\n", lc, cc); 295 break; 296 case 'w': 297 /* 298 * Write the message on a file. 299 */ 300 cp = &linebuf[2]; 301 while (*cp == ' ' || *cp == '\t') 302 cp++; 303 if (*cp == '\0') { 304 fprintf(stderr, "Write what file!?\n"); 305 break; 306 } 307 if ((cp = expand(cp)) == NOSTR) 308 break; 309 rewind(collf); 310 exwrite(cp, collf, 1); 311 break; 312 case 'm': 313 case 'M': 314 case 'f': 315 case 'F': 316 /* 317 * Interpolate the named messages, if we 318 * are in receiving mail mode. Does the 319 * standard list processing garbage. 320 * If ~f is given, we don't shift over. 321 */ 322 if (forward(linebuf + 2, collf, c) < 0) 323 goto err; 324 goto cont; 325 case '?': 326 if ((fbuf = Fopen(_PATH_TILDE, "r")) == NULL) { 327 perror(_PATH_TILDE); 328 break; 329 } 330 while ((t = getc(fbuf)) != EOF) 331 (void) putchar(t); 332 Fclose(fbuf); 333 break; 334 case 'p': 335 /* 336 * Print out the current state of the 337 * message without altering anything. 338 */ 339 rewind(collf); 340 printf("-------\nMessage contains:\n"); 341 puthead(hp, stdout, GTO|GSUBJECT|GCC|GBCC|GNL); 342 while ((t = getc(collf)) != EOF) 343 (void) putchar(t); 344 goto cont; 345 case '|': 346 /* 347 * Pipe message through command. 348 * Collect output as new message. 349 */ 350 rewind(collf); 351 mespipe(collf, &linebuf[2]); 352 goto cont; 353 case 'v': 354 case 'e': 355 /* 356 * Edit the current message. 357 * 'e' means to use EDITOR 358 * 'v' means to use VISUAL 359 */ 360 rewind(collf); 361 mesedit(collf, c); 362 goto cont; 363 } 364 } 365 goto out; 366 err: 367 if (collf != NULL) { 368 Fclose(collf); 369 collf = NULL; 370 } 371 out: 372 if (collf != NULL) 373 rewind(collf); 374 noreset--; 375 sigblock(sigmask(SIGINT) | sigmask(SIGHUP)); 376 signal(SIGINT, saveint); 377 signal(SIGHUP, savehup); 378 signal(SIGTSTP, savetstp); 379 signal(SIGTTOU, savettou); 380 signal(SIGTTIN, savettin); 381 sigsetmask(omask); 382 return collf; 383 } 384 385 /* 386 * Write a file, ex-like if f set. 387 */ 388 389 exwrite(name, fp, f) 390 char name[]; 391 FILE *fp; 392 { 393 register FILE *of; 394 register int c; 395 long cc; 396 int lc; 397 struct stat junk; 398 399 if (f) { 400 printf("\"%s\" ", name); 401 fflush(stdout); 402 } 403 if (stat(name, &junk) >= 0 && (junk.st_mode & S_IFMT) == S_IFREG) { 404 if (!f) 405 fprintf(stderr, "%s: ", name); 406 fprintf(stderr, "File exists\n"); 407 return(-1); 408 } 409 if ((of = Fopen(name, "w")) == NULL) { 410 perror(NOSTR); 411 return(-1); 412 } 413 lc = 0; 414 cc = 0; 415 while ((c = getc(fp)) != EOF) { 416 cc++; 417 if (c == '\n') 418 lc++; 419 (void) putc(c, of); 420 if (ferror(of)) { 421 perror(name); 422 Fclose(of); 423 return(-1); 424 } 425 } 426 Fclose(of); 427 printf("%d/%ld\n", lc, cc); 428 fflush(stdout); 429 return(0); 430 } 431 432 /* 433 * Edit the message being collected on fp. 434 * On return, make the edit file the new temp file. 435 */ 436 mesedit(fp, c) 437 FILE *fp; 438 { 439 sig_t sigint = signal(SIGINT, SIG_IGN); 440 FILE *nf = run_editor(fp, (off_t)-1, c, 0); 441 442 if (nf != NULL) { 443 fseek(nf, (off_t)0, 2); 444 collf = nf; 445 Fclose(fp); 446 } 447 (void) signal(SIGINT, sigint); 448 } 449 450 /* 451 * Pipe the message through the command. 452 * Old message is on stdin of command; 453 * New message collected from stdout. 454 * Sh -c must return 0 to accept the new message. 455 */ 456 mespipe(fp, cmd) 457 FILE *fp; 458 char cmd[]; 459 { 460 FILE *nf; 461 sig_t sigint = signal(SIGINT, SIG_IGN); 462 extern char tempEdit[]; 463 464 if ((nf = Fopen(tempEdit, "w+")) == NULL) { 465 perror(tempEdit); 466 goto out; 467 } 468 (void) unlink(tempEdit); 469 /* 470 * stdin = current message. 471 * stdout = new message. 472 */ 473 if (run_command(cmd, 0, fileno(fp), fileno(nf), NOSTR) < 0) { 474 (void) Fclose(nf); 475 goto out; 476 } 477 if (fsize(nf) == 0) { 478 fprintf(stderr, "No bytes from \"%s\" !?\n", cmd); 479 (void) Fclose(nf); 480 goto out; 481 } 482 /* 483 * Take new files. 484 */ 485 (void) fseek(nf, 0L, 2); 486 collf = nf; 487 (void) Fclose(fp); 488 out: 489 (void) signal(SIGINT, sigint); 490 } 491 492 /* 493 * Interpolate the named messages into the current 494 * message, preceding each line with a tab. 495 * Return a count of the number of characters now in 496 * the message, or -1 if an error is encountered writing 497 * the message temporary. The flag argument is 'm' if we 498 * should shift over and 'f' if not. 499 */ 500 forward(ms, fp, f) 501 char ms[]; 502 FILE *fp; 503 { 504 register int *msgvec; 505 extern char tempMail[]; 506 struct ignoretab *ig; 507 char *tabst; 508 509 msgvec = (int *) salloc((msgCount+1) * sizeof *msgvec); 510 if (msgvec == (int *) NOSTR) 511 return(0); 512 if (getmsglist(ms, msgvec, 0) < 0) 513 return(0); 514 if (*msgvec == 0) { 515 *msgvec = first(0, MMNORM); 516 if (*msgvec == NULL) { 517 printf("No appropriate messages\n"); 518 return(0); 519 } 520 msgvec[1] = NULL; 521 } 522 if (f == 'f' || f == 'F') 523 tabst = NOSTR; 524 else if ((tabst = value("indentprefix")) == NOSTR) 525 tabst = "\t"; 526 ig = isupper(f) ? NULL : ignore; 527 printf("Interpolating:"); 528 for (; *msgvec != 0; msgvec++) { 529 struct message *mp = message + *msgvec - 1; 530 531 touch(mp); 532 printf(" %d", *msgvec); 533 if (send(mp, fp, ig, tabst) < 0) { 534 perror(tempMail); 535 return(-1); 536 } 537 } 538 printf("\n"); 539 return(0); 540 } 541 542 /* 543 * Print (continue) when continued after ^Z. 544 */ 545 /*ARGSUSED*/ 546 void 547 collstop(s) 548 { 549 sig_t old_action = signal(s, SIG_DFL); 550 551 sigsetmask(sigblock(0) & ~sigmask(s)); 552 kill(0, s); 553 sigblock(sigmask(s)); 554 signal(s, old_action); 555 if (colljmp_p) { 556 colljmp_p = 0; 557 hadintr = 0; 558 longjmp(colljmp, 1); 559 } 560 } 561 562 /* 563 * On interrupt, come here to save the partial message in ~/dead.letter. 564 * Then jump out of the collection loop. 565 */ 566 /*ARGSUSED*/ 567 void 568 collint(s) 569 { 570 /* 571 * the control flow is subtle, because we can be called from ~q. 572 */ 573 if (!hadintr) { 574 if (value("ignore") != NOSTR) { 575 puts("@"); 576 fflush(stdout); 577 clearerr(stdin); 578 return; 579 } 580 hadintr = 1; 581 longjmp(colljmp, 1); 582 } 583 rewind(collf); 584 if (value("nosave") == NOSTR) 585 savedeadletter(collf); 586 longjmp(collabort, 1); 587 } 588 589 /*ARGSUSED*/ 590 void 591 collhup(s) 592 { 593 rewind(collf); 594 savedeadletter(collf); 595 /* 596 * Let's pretend nobody else wants to clean up, 597 * a true statement at this time. 598 */ 599 exit(1); 600 } 601 602 savedeadletter(fp) 603 register FILE *fp; 604 { 605 register FILE *dbuf; 606 register int c; 607 char *cp; 608 609 if (fsize(fp) == 0) 610 return; 611 cp = getdeadletter(); 612 c = umask(077); 613 dbuf = Fopen(cp, "a"); 614 (void) umask(c); 615 if (dbuf == NULL) 616 return; 617 while ((c = getc(fp)) != EOF) 618 (void) putc(c, dbuf); 619 Fclose(dbuf); 620 rewind(fp); 621 } 622