msgs.c revision 1.9
1 /* $NetBSD: msgs.c,v 1.9 1997/07/24 22:45:23 phil 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 #ifndef lint 37 static char copyright[] = 38 "@(#) Copyright (c) 1980, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)msgs.c 8.2 (Berkeley) 4/28/95"; 45 #else 46 static char rcsid[] = "$NetBSD: msgs.c,v 1.9 1997/07/24 22:45:23 phil Exp $"; 47 #endif 48 #endif /* not lint */ 49 50 /* 51 * msgs - a user bulletin board program 52 * 53 * usage: 54 * msgs [fhlopqr] [[-]number] to read messages 55 * msgs -s to place messages 56 * msgs -c [-days] to clean up the bulletin board 57 * 58 * prompt commands are: 59 * y print message 60 * n flush message, go to next message 61 * q flush message, quit 62 * p print message, turn on 'pipe thru more' mode 63 * P print message, turn off 'pipe thru more' mode 64 * - reprint last message 65 * s[-][<num>] [<filename>] save message 66 * m[-][<num>] mail with message in temp mbox 67 * x exit without flushing this message 68 * <num> print message number <num> 69 */ 70 71 #define V7 /* will look for TERM in the environment */ 72 #define OBJECT /* will object to messages without Subjects */ 73 #define REJECT /* will reject messages without Subjects 74 (OBJECT must be defined also) */ 75 /* #define UNBUFFERED /* use unbuffered output */ 76 77 #include <sys/param.h> 78 #include <sys/ioctl.h> 79 #include <sys/stat.h> 80 #include <dirent.h> 81 #include <ctype.h> 82 #include <errno.h> 83 #include <pwd.h> 84 #include <setjmp.h> 85 #include <signal.h> 86 #include <stdio.h> 87 #include <stdlib.h> 88 #include <string.h> 89 #include <termios.h> 90 #include <time.h> 91 #include <unistd.h> 92 #include "pathnames.h" 93 94 #define CMODE 0664 /* bounds file creation mode */ 95 #define NO 0 96 #define YES 1 97 #define SUPERUSER 0 /* superuser uid */ 98 #define DAEMON 1 /* daemon uid */ 99 #define NLINES 24 /* default number of lines/crt screen */ 100 #define NDAYS 21 /* default keep time for messages */ 101 #define DAYS *24*60*60 /* seconds/day */ 102 #define MSGSRC ".msgsrc" /* user's rc file */ 103 #define BOUNDS "bounds" /* message bounds file */ 104 #define NEXT "Next message? [yq]" 105 #define MORE "More? [ynq]" 106 #define NOMORE "(No more) [q] ?" 107 108 typedef char bool; 109 110 FILE *msgsrc; 111 FILE *newmsg; 112 char *sep = "-"; 113 char inbuf[BUFSIZ]; 114 char fname[128]; 115 char cmdbuf[128]; 116 char subj[128]; 117 char from[128]; 118 char date[128]; 119 char *ptr; 120 char *in; 121 bool local; 122 bool ruptible; 123 bool totty; 124 bool seenfrom; 125 bool seensubj; 126 bool blankline; 127 bool printing = NO; 128 bool mailing = NO; 129 bool quitit = NO; 130 bool sending = NO; 131 bool intrpflg = NO; 132 bool restricted = NO; 133 int uid; 134 int msg; 135 int prevmsg; 136 int lct; 137 int nlines; 138 int Lpp = 0; 139 time_t t; 140 time_t keep; 141 142 char *mktemp(); 143 char *nxtfld(); 144 void onintr(); 145 void onsusp(); 146 147 /* option initialization */ 148 bool hdrs = NO; 149 bool qopt = NO; 150 bool hush = NO; 151 bool send_msg = NO; 152 bool locomode = NO; 153 bool use_pager = NO; 154 bool clean = NO; 155 bool lastcmd = NO; 156 jmp_buf tstpbuf; 157 158 main(argc, argv) 159 int argc; char *argv[]; 160 { 161 bool newrc, already; 162 int rcfirst = 0; /* first message to print (from .rc) */ 163 int rcback = 0; /* amount to back off of rcfirst */ 164 int firstmsg, nextmsg, lastmsg = 0; 165 int blast = 0; 166 FILE *bounds; 167 168 #ifdef UNBUFFERED 169 setbuf(stdout, NULL); 170 #endif 171 172 time(&t); 173 setuid(uid = getuid()); 174 ruptible = (signal(SIGINT, SIG_IGN) == SIG_DFL); 175 if (ruptible) 176 signal(SIGINT, SIG_DFL); 177 178 argc--, argv++; 179 while (argc > 0) { 180 if (isdigit(argv[0][0])) { /* starting message # */ 181 rcfirst = atoi(argv[0]); 182 } 183 else if (isdigit(argv[0][1])) { /* backward offset */ 184 rcback = atoi( &( argv[0][1] ) ); 185 } 186 else { 187 ptr = *argv; 188 while (*ptr) switch (*ptr++) { 189 190 case '-': 191 break; 192 193 case 'c': 194 if (uid != SUPERUSER && uid != DAEMON) { 195 fprintf(stderr, "Sorry\n"); 196 exit(1); 197 } 198 clean = YES; 199 break; 200 201 case 'f': /* silently */ 202 hush = YES; 203 break; 204 205 case 'h': /* headers only */ 206 hdrs = YES; 207 break; 208 209 case 'l': /* local msgs only */ 210 locomode = YES; 211 break; 212 213 case 'o': /* option to save last message */ 214 lastcmd = YES; 215 break; 216 217 case 'p': /* pipe thru 'more' during long msgs */ 218 use_pager = YES; 219 break; 220 221 case 'q': /* query only */ 222 qopt = YES; 223 break; 224 225 case 'r': /* restricted */ 226 restricted = YES; 227 break; 228 229 230 case 's': /* sending TO msgs */ 231 send_msg = YES; 232 break; 233 234 default: 235 fprintf(stderr, 236 "usage: msgs [fhlopqr] [[-]number]\n"); 237 exit(1); 238 } 239 } 240 argc--, argv++; 241 } 242 243 /* 244 * determine current message bounds 245 */ 246 sprintf(fname, "%s/%s", _PATH_MSGS, BOUNDS); 247 bounds = fopen(fname, "r"); 248 249 if (bounds != NULL) { 250 if (fscanf(bounds, "%d %d\n", &firstmsg, &lastmsg) < 2) 251 firstmsg = lastmsg = 0; 252 fclose(bounds); 253 blast = lastmsg; /* save upper bound */ 254 } 255 256 if (clean) 257 keep = t - (rcback? rcback : NDAYS) DAYS; 258 259 if (clean || bounds == NULL) { /* relocate message bounds */ 260 struct dirent *dp; 261 struct stat stbuf; 262 bool seenany = NO; 263 DIR *dirp; 264 265 dirp = opendir(_PATH_MSGS); 266 if (dirp == NULL) { 267 perror(_PATH_MSGS); 268 exit(errno); 269 } 270 chmod(fname, CMODE); 271 272 firstmsg = 32767; 273 lastmsg = 0; 274 275 for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)){ 276 register char *cp = dp->d_name; 277 register int i = 0; 278 279 if (dp->d_ino == 0) 280 continue; 281 if (dp->d_namlen == 0) 282 continue; 283 284 if (clean) 285 sprintf(inbuf, "%s/%s", _PATH_MSGS, cp); 286 287 while (isdigit(*cp)) 288 i = i * 10 + *cp++ - '0'; 289 if (*cp) 290 continue; /* not a message! */ 291 292 if (clean) { 293 if (stat(inbuf, &stbuf) != 0) 294 continue; 295 if (stbuf.st_mtime < keep 296 && stbuf.st_mode&S_IWRITE) { 297 unlink(inbuf); 298 continue; 299 } 300 } 301 302 if (i > lastmsg) 303 lastmsg = i; 304 if (i < firstmsg) 305 firstmsg = i; 306 seenany = YES; 307 } 308 closedir(dirp); 309 310 if (!seenany) { 311 if (blast != 0) /* never lower the upper bound! */ 312 lastmsg = blast; 313 firstmsg = lastmsg + 1; 314 } 315 else if (blast > lastmsg) 316 lastmsg = blast; 317 318 if (!send_msg) { 319 bounds = fopen(fname, "w"); 320 if (bounds == NULL) { 321 perror(fname); 322 exit(errno); 323 } 324 chmod(fname, CMODE); 325 fprintf(bounds, "%d %d\n", firstmsg, lastmsg); 326 fclose(bounds); 327 } 328 } 329 330 if (send_msg) { 331 /* 332 * Send mode - place msgs in _PATH_MSGS 333 */ 334 bounds = fopen(fname, "w"); 335 if (bounds == NULL) { 336 perror(fname); 337 exit(errno); 338 } 339 340 nextmsg = lastmsg + 1; 341 sprintf(fname, "%s/%d", _PATH_MSGS, nextmsg); 342 newmsg = fopen(fname, "w"); 343 if (newmsg == NULL) { 344 perror(fname); 345 exit(errno); 346 } 347 chmod(fname, 0644); 348 349 fprintf(bounds, "%d %d\n", firstmsg, nextmsg); 350 fclose(bounds); 351 352 sending = YES; 353 if (ruptible) 354 signal(SIGINT, onintr); 355 356 if (isatty(fileno(stdin))) { 357 ptr = getpwuid(uid)->pw_name; 358 printf("Message %d:\nFrom %s %sSubject: ", 359 nextmsg, ptr, ctime(&t)); 360 fflush(stdout); 361 fgets(inbuf, sizeof inbuf, stdin); 362 putchar('\n'); 363 fflush(stdout); 364 fprintf(newmsg, "From %s %sSubject: %s\n", 365 ptr, ctime(&t), inbuf); 366 blankline = seensubj = YES; 367 } 368 else 369 blankline = seensubj = NO; 370 for (;;) { 371 fgets(inbuf, sizeof inbuf, stdin); 372 if (feof(stdin) || ferror(stdin)) 373 break; 374 blankline = (blankline || (inbuf[0] == '\n')); 375 seensubj = (seensubj || (!blankline && (strncmp(inbuf, "Subj", 4) == 0))); 376 fputs(inbuf, newmsg); 377 } 378 #ifdef OBJECT 379 if (!seensubj) { 380 printf("NOTICE: Messages should have a Subject field!\n"); 381 #ifdef REJECT 382 unlink(fname); 383 #endif 384 exit(1); 385 } 386 #endif 387 exit(ferror(stdin)); 388 } 389 if (clean) 390 exit(0); 391 392 /* 393 * prepare to display messages 394 */ 395 totty = (isatty(fileno(stdout)) != 0); 396 use_pager = use_pager && totty; 397 398 sprintf(fname, "%s/%s", getenv("HOME"), MSGSRC); 399 msgsrc = fopen(fname, "r"); 400 if (msgsrc) { 401 newrc = NO; 402 fscanf(msgsrc, "%d\n", &nextmsg); 403 fclose(msgsrc); 404 if (nextmsg > lastmsg+1) { 405 printf("Warning: bounds have been reset (%d, %d)\n", 406 firstmsg, lastmsg); 407 truncate(fname, (off_t)0); 408 newrc = YES; 409 } 410 else if (!rcfirst) 411 rcfirst = nextmsg - rcback; 412 } 413 else 414 newrc = YES; 415 msgsrc = fopen(fname, "r+"); 416 if (msgsrc == NULL) 417 msgsrc = fopen(fname, "w"); 418 if (msgsrc == NULL) { 419 perror(fname); 420 exit(errno); 421 } 422 if (rcfirst) { 423 if (rcfirst > lastmsg+1) { 424 printf("Warning: the last message is number %d.\n", 425 lastmsg); 426 rcfirst = nextmsg; 427 } 428 if (rcfirst > firstmsg) 429 firstmsg = rcfirst; /* don't set below first msg */ 430 } 431 if (newrc) { 432 nextmsg = firstmsg; 433 fseek(msgsrc, 0L, 0); 434 fprintf(msgsrc, "%d\n", nextmsg); 435 fflush(msgsrc); 436 } 437 438 #ifdef V7 439 if (totty) { 440 struct winsize win; 441 if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1) 442 Lpp = win.ws_row; 443 if (Lpp <= 0) { 444 if (tgetent(inbuf, getenv("TERM")) <= 0 445 || (Lpp = tgetnum("li")) <= 0) { 446 Lpp = NLINES; 447 } 448 } 449 } 450 #endif 451 Lpp -= 6; /* for headers, etc. */ 452 453 already = NO; 454 prevmsg = firstmsg; 455 printing = YES; 456 if (ruptible) 457 signal(SIGINT, onintr); 458 459 /* 460 * Main program loop 461 */ 462 for (msg = firstmsg; msg <= lastmsg; msg++) { 463 464 sprintf(fname, "%s/%d", _PATH_MSGS, msg); 465 newmsg = fopen(fname, "r"); 466 if (newmsg == NULL) 467 continue; 468 469 gfrsub(newmsg); /* get From and Subject fields */ 470 if (locomode && !local) { 471 fclose(newmsg); 472 continue; 473 } 474 475 if (qopt) { /* This has to be located here */ 476 printf("There are new messages.\n"); 477 exit(0); 478 } 479 480 if (already && !hdrs) 481 putchar('\n'); 482 483 /* 484 * Print header 485 */ 486 if (totty) 487 signal(SIGTSTP, onsusp); 488 (void) setjmp(tstpbuf); 489 already = YES; 490 nlines = 2; 491 if (seenfrom) { 492 printf("Message %d:\nFrom %s %s", msg, from, date); 493 nlines++; 494 } 495 if (seensubj) { 496 printf("Subject: %s", subj); 497 nlines++; 498 } 499 else { 500 if (seenfrom) { 501 putchar('\n'); 502 nlines++; 503 } 504 while (nlines < 6 505 && fgets(inbuf, sizeof inbuf, newmsg) 506 && inbuf[0] != '\n') { 507 fputs(inbuf, stdout); 508 nlines++; 509 } 510 } 511 512 lct = linecnt(newmsg); 513 if (lct) 514 printf("(%d%slines) ", lct, seensubj? " " : " more "); 515 516 if (hdrs) { 517 printf("\n-----\n"); 518 fclose(newmsg); 519 continue; 520 } 521 522 /* 523 * Ask user for command 524 */ 525 if (totty) 526 ask(lct? MORE : (msg==lastmsg? NOMORE : NEXT)); 527 else 528 inbuf[0] = 'y'; 529 if (totty) 530 signal(SIGTSTP, SIG_DFL); 531 cmnd: 532 in = inbuf; 533 switch (*in) { 534 case 'x': 535 case 'X': 536 exit(0); 537 538 case 'q': 539 case 'Q': 540 quitit = YES; 541 printf("--Postponed--\n"); 542 exit(0); 543 /* intentional fall-thru */ 544 case 'n': 545 case 'N': 546 if (msg >= nextmsg) sep = "Flushed"; 547 prevmsg = msg; 548 break; 549 550 case 'p': 551 case 'P': 552 use_pager = (*in++ == 'p'); 553 /* intentional fallthru */ 554 case '\n': 555 case 'y': 556 default: 557 if (*in == '-') { 558 msg = prevmsg-1; 559 sep = "replay"; 560 break; 561 } 562 if (isdigit(*in)) { 563 msg = next(in); 564 sep = in; 565 break; 566 } 567 568 prmesg(nlines + lct + (seensubj? 1 : 0)); 569 prevmsg = msg; 570 571 } 572 573 printf("--%s--\n", sep); 574 sep = "-"; 575 if (msg >= nextmsg) { 576 nextmsg = msg + 1; 577 fseek(msgsrc, 0L, 0); 578 fprintf(msgsrc, "%d\n", nextmsg); 579 fflush(msgsrc); 580 } 581 if (newmsg) 582 fclose(newmsg); 583 if (quitit) 584 break; 585 } 586 587 /* 588 * Make sure .rc file gets updated 589 */ 590 if (--msg >= nextmsg) { 591 nextmsg = msg + 1; 592 fseek(msgsrc, 0L, 0); 593 fprintf(msgsrc, "%d\n", nextmsg); 594 fflush(msgsrc); 595 } 596 if (already && !quitit && lastcmd && totty) { 597 /* 598 * save or reply to last message? 599 */ 600 msg = prevmsg; 601 ask(NOMORE); 602 if (inbuf[0] == '-' || isdigit(inbuf[0])) 603 goto cmnd; 604 } 605 if (!(already || hush || qopt)) 606 printf("No new messages.\n"); 607 exit(0); 608 } 609 610 prmesg(length) 611 int length; 612 { 613 FILE *outf; 614 char *env_pager; 615 616 if (use_pager && length > Lpp) { 617 signal(SIGPIPE, SIG_IGN); 618 signal(SIGQUIT, SIG_IGN); 619 if ((env_pager = getenv("PAGER")) == NULL) { 620 sprintf(cmdbuf, _PATH_PAGER, Lpp); 621 } else { 622 strcpy(cmdbuf, env_pager); 623 } 624 outf = popen(cmdbuf, "w"); 625 if (!outf) 626 outf = stdout; 627 else 628 setbuf(outf, (char *)NULL); 629 } 630 else 631 outf = stdout; 632 633 if (seensubj) 634 putc('\n', outf); 635 636 while (fgets(inbuf, sizeof inbuf, newmsg)) { 637 fputs(inbuf, outf); 638 if (ferror(outf)) { 639 clearerr(outf); 640 break; 641 } 642 } 643 644 if (outf != stdout) { 645 pclose(outf); 646 signal(SIGPIPE, SIG_DFL); 647 signal(SIGQUIT, SIG_DFL); 648 } 649 else { 650 fflush(stdout); 651 } 652 653 /* trick to force wait on output */ 654 tcdrain(fileno(stdout)); 655 } 656 657 void 658 onintr() 659 { 660 signal(SIGINT, onintr); 661 if (mailing) 662 unlink(fname); 663 if (sending) { 664 unlink(fname); 665 puts("--Killed--"); 666 exit(1); 667 } 668 if (printing) { 669 putchar('\n'); 670 if (hdrs) 671 exit(0); 672 sep = "Interrupt"; 673 if (newmsg) 674 fseek(newmsg, 0L, 2); 675 intrpflg = YES; 676 } 677 } 678 679 /* 680 * We have just gotten a susp. Suspend and prepare to resume. 681 */ 682 void 683 onsusp() 684 { 685 686 signal(SIGTSTP, SIG_DFL); 687 sigsetmask(0); 688 kill(0, SIGTSTP); 689 signal(SIGTSTP, onsusp); 690 if (!mailing) 691 longjmp(tstpbuf, 0); 692 } 693 694 linecnt(f) 695 FILE *f; 696 { 697 off_t oldpos = ftell(f); 698 int l = 0; 699 char lbuf[BUFSIZ]; 700 701 while (fgets(lbuf, sizeof lbuf, f)) 702 l++; 703 clearerr(f); 704 fseek(f, oldpos, 0); 705 return (l); 706 } 707 708 next(buf) 709 char *buf; 710 { 711 int i; 712 sscanf(buf, "%d", &i); 713 sprintf(buf, "Goto %d", i); 714 return(--i); 715 } 716 717 ask(prompt) 718 char *prompt; 719 { 720 char inch; 721 int n, cmsg; 722 off_t oldpos; 723 FILE *cpfrom, *cpto; 724 725 printf("%s ", prompt); 726 fflush(stdout); 727 intrpflg = NO; 728 (void) fgets(inbuf, sizeof inbuf, stdin); 729 if ((n = strlen(inbuf)) > 0 && inbuf[n - 1] == '\n') 730 inbuf[n - 1] = '\0'; 731 if (intrpflg) 732 inbuf[0] = 'x'; 733 734 /* 735 * Handle 'mail' and 'save' here. 736 */ 737 if (((inch = inbuf[0]) == 's' || inch == 'm') && !restricted) { 738 if (inbuf[1] == '-') 739 cmsg = prevmsg; 740 else if (isdigit(inbuf[1])) 741 cmsg = atoi(&inbuf[1]); 742 else 743 cmsg = msg; 744 sprintf(fname, "%s/%d", _PATH_MSGS, cmsg); 745 746 oldpos = ftell(newmsg); 747 748 cpfrom = fopen(fname, "r"); 749 if (!cpfrom) { 750 printf("Message %d not found\n", cmsg); 751 ask (prompt); 752 return; 753 } 754 755 if (inch == 's') { 756 in = nxtfld(inbuf); 757 if (*in) { 758 for (n=0; in[n] > ' '; n++) { /* sizeof fname? */ 759 fname[n] = in[n]; 760 } 761 fname[n] = '\0'; 762 } 763 else 764 strcpy(fname, "Messages"); 765 } 766 else { 767 strcpy(fname, _PATH_TMP); 768 mktemp(fname); 769 sprintf(cmdbuf, _PATH_MAIL, fname); 770 mailing = YES; 771 } 772 cpto = fopen(fname, "a"); 773 if (!cpto) { 774 perror(fname); 775 mailing = NO; 776 fseek(newmsg, oldpos, 0); 777 ask(prompt); 778 return; 779 } 780 781 while (n = fread(inbuf, 1, sizeof inbuf, cpfrom)) 782 fwrite(inbuf, 1, n, cpto); 783 784 fclose(cpfrom); 785 fclose(cpto); 786 fseek(newmsg, oldpos, 0); /* reposition current message */ 787 if (inch == 's') 788 printf("Message %d saved in \"%s\"\n", cmsg, fname); 789 else { 790 system(cmdbuf); 791 unlink(fname); 792 mailing = NO; 793 } 794 ask(prompt); 795 } 796 } 797 798 gfrsub(infile) 799 FILE *infile; 800 { 801 off_t frompos; 802 803 seensubj = seenfrom = NO; 804 local = YES; 805 subj[0] = from[0] = date[0] = 0; 806 807 /* 808 * Is this a normal message? 809 */ 810 if (fgets(inbuf, sizeof inbuf, infile)) { 811 if (strncmp(inbuf, "From", 4)==0) { 812 /* 813 * expected form starts with From 814 */ 815 seenfrom = YES; 816 frompos = ftell(infile); 817 ptr = from; 818 in = nxtfld(inbuf); 819 if (*in) while (*in && *in > ' ') { 820 if (*in == ':' || *in == '@' || *in == '!') 821 local = NO; 822 *ptr++ = *in++; 823 /* what about sizeof from ? */ 824 } 825 *ptr = '\0'; 826 if (*(in = nxtfld(in))) 827 strncpy(date, in, sizeof date); 828 else { 829 date[0] = '\n'; 830 date[1] = '\0'; 831 } 832 } 833 else { 834 /* 835 * not the expected form 836 */ 837 fseek(infile, 0L, 0); 838 return; 839 } 840 } 841 else 842 /* 843 * empty file ? 844 */ 845 return; 846 847 /* 848 * look for Subject line until EOF or a blank line 849 */ 850 while (fgets(inbuf, sizeof inbuf, infile) 851 && !(blankline = (inbuf[0] == '\n'))) { 852 /* 853 * extract Subject line 854 */ 855 if (!seensubj && strncmp(inbuf, "Subj", 4)==0) { 856 seensubj = YES; 857 frompos = ftell(infile); 858 strncpy(subj, nxtfld(inbuf), sizeof subj); 859 } 860 } 861 if (!blankline) 862 /* 863 * ran into EOF 864 */ 865 fseek(infile, frompos, 0); 866 867 if (!seensubj) 868 /* 869 * for possible use with Mail 870 */ 871 strncpy(subj, "(No Subject)\n", sizeof subj); 872 } 873 874 char * 875 nxtfld(s) 876 char *s; 877 { 878 if (*s) while (*s && *s > ' ') s++; /* skip over this field */ 879 if (*s) while (*s && *s <= ' ') s++; /* find start of next field */ 880 return (s); 881 } 882
Indexes created Wed Sep 24 15:09:51 GMT 2025