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 copyright[] = 36 "@(#) Copyright (c) 1980, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 static char sccsid[] = "@(#)msgs.c 8.1 (Berkeley) 6/6/93"; 42 #endif /* not lint */ 43 44 /* 45 * msgs - a user bulletin board program 46 * 47 * usage: 48 * msgs [fhlopq] [[-]number] to read messages 49 * msgs -s to place messages 50 * msgs -c [-days] to clean up the bulletin board 51 * 52 * prompt commands are: 53 * y print message 54 * n flush message, go to next message 55 * q flush message, quit 56 * p print message, turn on 'pipe thru more' mode 57 * P print message, turn off 'pipe thru more' mode 58 * - reprint last message 59 * s[-][<num>] [<filename>] save message 60 * m[-][<num>] mail with message in temp mbox 61 * x exit without flushing this message 62 * <num> print message number <num> 63 */ 64 65 #define V7 /* will look for TERM in the environment */ 66 #define OBJECT /* will object to messages without Subjects */ 67 /* #define REJECT */ /* will reject messages without Subjects 68 (OBJECT must be defined also) */ 69 /* #define UNBUFFERED *//* use unbuffered output */ 70 71 #include <sys/param.h> 72 #include <sys/dir.h> 73 #include <sys/stat.h> 74 #include <ctype.h> 75 #include <errno.h> 76 #include <pwd.h> 77 #include <setjmp.h> 78 #include <termios.h> 79 #include <signal.h> 80 #include <stdio.h> 81 #include <stdlib.h> 82 #include <string.h> 83 #include <time.h> 84 #include <unistd.h> 85 #include "pathnames.h" 86 87 #define CMODE 0644 /* bounds file creation mode */ 88 #define NO 0 89 #define YES 1 90 #define SUPERUSER 0 /* superuser uid */ 91 #define DAEMON 1 /* daemon uid */ 92 #define NLINES 24 /* default number of lines/crt screen */ 93 #define NDAYS 21 /* default keep time for messages */ 94 #define DAYS *24*60*60 /* seconds/day */ 95 #define MSGSRC ".msgsrc" /* user's rc file */ 96 #define BOUNDS "bounds" /* message bounds file */ 97 #define NEXT "Next message? [yq]" 98 #define MORE "More? [ynq]" 99 #define NOMORE "(No more) [q] ?" 100 101 typedef char bool; 102 103 FILE *msgsrc; 104 FILE *newmsg; 105 char *sep = "-"; 106 char inbuf[BUFSIZ]; 107 char fname[128]; 108 char cmdbuf[128]; 109 char subj[128]; 110 char from[128]; 111 char date[128]; 112 char *ptr; 113 char *in; 114 bool local; 115 bool ruptible; 116 bool totty; 117 bool seenfrom; 118 bool seensubj; 119 bool blankline; 120 bool printing = NO; 121 bool mailing = NO; 122 bool quitit = NO; 123 bool sending = NO; 124 bool intrpflg = NO; 125 int uid; 126 int msg; 127 int prevmsg; 128 int lct; 129 int nlines; 130 int Lpp = 0; 131 time_t t; 132 time_t keep; 133 134 char *mktemp(); 135 char *nxtfld(); 136 void onintr(); 137 void onsusp(); 138 139 /* option initialization */ 140 bool hdrs = NO; 141 bool qopt = NO; 142 bool hush = NO; 143 bool send_msg = NO; 144 bool locomode = NO; 145 bool use_pager = NO; 146 bool clean = NO; 147 bool lastcmd = NO; 148 jmp_buf tstpbuf; 149 150 main(argc, argv) 151 int argc; char *argv[]; 152 { 153 bool newrc, already; 154 int rcfirst = 0; /* first message to print (from .rc) */ 155 int rcback = 0; /* amount to back off of rcfirst */ 156 int firstmsg, nextmsg, lastmsg = 0; 157 int blast = 0; 158 FILE *bounds; 159 160 #ifdef UNBUFFERED 161 setbuf(stdout, NULL); 162 #endif 163 164 165 time(&t); 166 setuid(uid = getuid()); 167 ruptible = (signal(SIGINT, SIG_IGN) == SIG_DFL); 168 if (ruptible) 169 signal(SIGINT, SIG_DFL); 170 171 argc--, argv++; 172 while (argc > 0) { 173 if (isdigit(argv[0][0])) { /* starting message # */ 174 rcfirst = atoi(argv[0]); 175 } 176 else if (isdigit(argv[0][1])) { /* backward offset */ 177 rcback = atoi( &( argv[0][1] ) ); 178 } 179 else { 180 ptr = *argv; 181 while (*ptr) switch (*ptr++) { 182 183 case '-': 184 break; 185 186 case 'c': 187 if (uid != SUPERUSER && uid != DAEMON) { 188 fprintf(stderr, "Sorry\n"); 189 exit(1); 190 } 191 clean = YES; 192 break; 193 194 case 'f': /* silently */ 195 hush = YES; 196 break; 197 198 case 'h': /* headers only */ 199 hdrs = YES; 200 break; 201 202 case 'l': /* local msgs only */ 203 locomode = YES; 204 break; 205 206 case 'o': /* option to save last message */ 207 lastcmd = YES; 208 break; 209 210 case 'p': /* pipe thru 'more' during long msgs */ 211 use_pager = YES; 212 break; 213 214 case 'q': /* query only */ 215 qopt = YES; 216 break; 217 218 case 's': /* sending TO msgs */ 219 send_msg = YES; 220 break; 221 222 default: 223 fprintf(stderr, 224 "usage: msgs [fhlopq] [[-]number]\n"); 225 exit(1); 226 } 227 } 228 argc--, argv++; 229 } 230 231 /* 232 * determine current message bounds 233 */ 234 sprintf(fname, "%s/%s", _PATH_MSGS, BOUNDS); 235 bounds = fopen(fname, "r"); 236 237 if (bounds != NULL) { 238 fscanf(bounds, "%d %d\n", &firstmsg, &lastmsg); 239 fclose(bounds); 240 blast = lastmsg; /* save upper bound */ 241 } 242 243 if (clean) 244 keep = t - (rcback? rcback : NDAYS) DAYS; 245 246 if (clean || bounds == NULL) { /* relocate message bounds */ 247 struct direct *dp; 248 struct stat stbuf; 249 bool seenany = NO; 250 DIR *dirp; 251 252 dirp = opendir(_PATH_MSGS); 253 if (dirp == NULL) { 254 perror(_PATH_MSGS); 255 exit(errno); 256 } 257 258 firstmsg = 32767; 259 lastmsg = 0; 260 261 for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)){ 262 register char *cp = dp->d_name; 263 register int i = 0; 264 265 if (dp->d_ino == 0) 266 continue; 267 if (dp->d_namlen == 0) 268 continue; 269 270 if (clean) 271 sprintf(inbuf, "%s/%s", _PATH_MSGS, cp); 272 273 while (isdigit(*cp)) 274 i = i * 10 + *cp++ - '0'; 275 if (*cp) 276 continue; /* not a message! */ 277 278 if (clean) { 279 if (stat(inbuf, &stbuf) != 0) 280 continue; 281 if (stbuf.st_mtime < keep 282 && stbuf.st_mode&S_IWRITE) { 283 unlink(inbuf); 284 continue; 285 } 286 } 287 288 if (i > lastmsg) 289 lastmsg = i; 290 if (i < firstmsg) 291 firstmsg = i; 292 seenany = YES; 293 } 294 closedir(dirp); 295 296 if (!seenany) { 297 if (blast != 0) /* never lower the upper bound! */ 298 lastmsg = blast; 299 firstmsg = lastmsg + 1; 300 } 301 else if (blast > lastmsg) 302 lastmsg = blast; 303 304 if (!send_msg) { 305 bounds = fopen(fname, "w"); 306 if (bounds == NULL) { 307 perror(fname); 308 exit(errno); 309 } 310 chmod(fname, CMODE); 311 fprintf(bounds, "%d %d\n", firstmsg, lastmsg); 312 fclose(bounds); 313 } 314 } 315 316 if (send_msg) { 317 /* 318 * Send mode - place msgs in _PATH_MSGS 319 */ 320 bounds = fopen(fname, "w"); 321 if (bounds == NULL) { 322 perror(fname); 323 exit(errno); 324 } 325 326 nextmsg = lastmsg + 1; 327 sprintf(fname, "%s/%d", _PATH_MSGS, nextmsg); 328 newmsg = fopen(fname, "w"); 329 if (newmsg == NULL) { 330 perror(fname); 331 exit(errno); 332 } 333 chmod(fname, CMODE); 334 335 fprintf(bounds, "%d %d\n", firstmsg, nextmsg); 336 fclose(bounds); 337 338 sending = YES; 339 if (ruptible) 340 signal(SIGINT, onintr); 341 342 if (isatty(fileno(stdin))) { 343 ptr = getpwuid(uid)->pw_name; 344 printf("Message %d:\nFrom %s %sSubject: ", 345 nextmsg, ptr, ctime(&t)); 346 fflush(stdout); 347 fgets(inbuf, sizeof inbuf, stdin); 348 putchar('\n'); 349 fflush(stdout); 350 fprintf(newmsg, "From %s %sSubject: %s\n", 351 ptr, ctime(&t), inbuf); 352 blankline = seensubj = YES; 353 } 354 else 355 blankline = seensubj = NO; 356 for (;;) { 357 fgets(inbuf, sizeof inbuf, stdin); 358 if (feof(stdin) || ferror(stdin)) 359 break; 360 blankline = (blankline || (inbuf[0] == '\n')); 361 seensubj = (seensubj || (!blankline && (strncmp(inbuf, "Subj", 4) == 0))); 362 fputs(inbuf, newmsg); 363 } 364 #ifdef OBJECT 365 if (!seensubj) { 366 printf("NOTICE: Messages should have a Subject field!\n"); 367 #ifdef REJECT 368 unlink(fname); 369 #endif 370 exit(1); 371 } 372 #endif 373 exit(ferror(stdin)); 374 } 375 if (clean) 376 exit(0); 377 378 /* 379 * prepare to display messages 380 */ 381 totty = (isatty(fileno(stdout)) != 0); 382 use_pager = use_pager && totty; 383 384 sprintf(fname, "%s/%s", getenv("HOME"), MSGSRC); 385 msgsrc = fopen(fname, "r"); 386 if (msgsrc) { 387 newrc = NO; 388 fscanf(msgsrc, "%d\n", &nextmsg); 389 fclose(msgsrc); 390 if (nextmsg > lastmsg+1) { 391 printf("Warning: bounds have been reset (%d, %d)\n", 392 firstmsg, lastmsg); 393 truncate(fname, (off_t)0); 394 newrc = YES; 395 } 396 else if (!rcfirst) 397 rcfirst = nextmsg - rcback; 398 } 399 else 400 newrc = YES; 401 msgsrc = fopen(fname, "r+"); 402 if (msgsrc == NULL) 403 msgsrc = fopen(fname, "w"); 404 if (msgsrc == NULL) { 405 perror(fname); 406 exit(errno); 407 } 408 if (rcfirst) { 409 if (rcfirst > lastmsg+1) { 410 printf("Warning: the last message is number %d.\n", 411 lastmsg); 412 rcfirst = nextmsg; 413 } 414 if (rcfirst > firstmsg) 415 firstmsg = rcfirst; /* don't set below first msg */ 416 } 417 if (newrc) { 418 nextmsg = firstmsg; 419 fseek(msgsrc, 0L, 0); 420 fprintf(msgsrc, "%d\n", nextmsg); 421 fflush(msgsrc); 422 } 423 424 #ifdef V7 425 if (totty) { 426 struct winsize win; 427 if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1) 428 Lpp = win.ws_row; 429 if (Lpp <= 0) { 430 if (tgetent(inbuf, getenv("TERM")) <= 0 431 || (Lpp = tgetnum("li")) <= 0) { 432 Lpp = NLINES; 433 } 434 } 435 } 436 #endif 437 Lpp -= 6; /* for headers, etc. */ 438 439 already = NO; 440 prevmsg = firstmsg; 441 printing = YES; 442 if (ruptible) 443 signal(SIGINT, onintr); 444 445 /* 446 * Main program loop 447 */ 448 for (msg = firstmsg; msg <= lastmsg; msg++) { 449 450 sprintf(fname, "%s/%d", _PATH_MSGS, msg); 451 newmsg = fopen(fname, "r"); 452 if (newmsg == NULL) 453 continue; 454 455 gfrsub(newmsg); /* get From and Subject fields */ 456 if (locomode && !local) { 457 fclose(newmsg); 458 continue; 459 } 460 461 if (qopt) { /* This has to be located here */ 462 printf("There are new messages.\n"); 463 exit(0); 464 } 465 466 if (already && !hdrs) 467 putchar('\n'); 468 469 /* 470 * Print header 471 */ 472 if (totty) 473 signal(SIGTSTP, onsusp); 474 (void) setjmp(tstpbuf); 475 already = YES; 476 nlines = 2; 477 if (seenfrom) { 478 printf("Message %d:\nFrom %s %s", msg, from, date); 479 nlines++; 480 } 481 if (seensubj) { 482 printf("Subject: %s", subj); 483 nlines++; 484 } 485 else { 486 if (seenfrom) { 487 putchar('\n'); 488 nlines++; 489 } 490 while (nlines < 6 491 && fgets(inbuf, sizeof inbuf, newmsg) 492 && inbuf[0] != '\n') { 493 fputs(inbuf, stdout); 494 nlines++; 495 } 496 } 497 498 lct = linecnt(newmsg); 499 if (lct) 500 printf("(%d%slines) ", lct, seensubj? " " : " more "); 501 502 if (hdrs) { 503 printf("\n-----\n"); 504 fclose(newmsg); 505 continue; 506 } 507 508 /* 509 * Ask user for command 510 */ 511 if (totty) 512 ask(lct? MORE : (msg==lastmsg? NOMORE : NEXT)); 513 else 514 inbuf[0] = 'y'; 515 if (totty) 516 signal(SIGTSTP, SIG_DFL); 517 cmnd: 518 in = inbuf; 519 switch (*in) { 520 case 'x': 521 case 'X': 522 exit(0); 523 524 case 'q': 525 case 'Q': 526 quitit = YES; 527 printf("--Postponed--\n"); 528 exit(0); 529 /* intentional fall-thru */ 530 case 'n': 531 case 'N': 532 if (msg >= nextmsg) sep = "Flushed"; 533 prevmsg = msg; 534 break; 535 536 case 'p': 537 case 'P': 538 use_pager = (*in++ == 'p'); 539 /* intentional fallthru */ 540 case '\n': 541 case 'y': 542 default: 543 if (*in == '-') { 544 msg = prevmsg-1; 545 sep = "replay"; 546 break; 547 } 548 if (isdigit(*in)) { 549 msg = next(in); 550 sep = in; 551 break; 552 } 553 554 prmesg(nlines + lct + (seensubj? 1 : 0)); 555 prevmsg = msg; 556 557 } 558 559 printf("--%s--\n", sep); 560 sep = "-"; 561 if (msg >= nextmsg) { 562 nextmsg = msg + 1; 563 fseek(msgsrc, 0L, 0); 564 fprintf(msgsrc, "%d\n", nextmsg); 565 fflush(msgsrc); 566 } 567 if (newmsg) 568 fclose(newmsg); 569 if (quitit) 570 break; 571 } 572 573 /* 574 * Make sure .rc file gets updated 575 */ 576 if (--msg >= nextmsg) { 577 nextmsg = msg + 1; 578 fseek(msgsrc, 0L, 0); 579 fprintf(msgsrc, "%d\n", nextmsg); 580 fflush(msgsrc); 581 } 582 if (already && !quitit && lastcmd && totty) { 583 /* 584 * save or reply to last message? 585 */ 586 msg = prevmsg; 587 ask(NOMORE); 588 if (inbuf[0] == '-' || isdigit(inbuf[0])) 589 goto cmnd; 590 } 591 if (!(already || hush || qopt)) 592 printf("No new messages.\n"); 593 exit(0); 594 } 595 596 prmesg(length) 597 int length; 598 { 599 FILE *outf; 600 601 if (use_pager && length > Lpp) { 602 signal(SIGPIPE, SIG_IGN); 603 signal(SIGQUIT, SIG_IGN); 604 sprintf(cmdbuf, _PATH_PAGER, Lpp); 605 outf = popen(cmdbuf, "w"); 606 if (!outf) 607 outf = stdout; 608 else 609 setbuf(outf, (char *)NULL); 610 } 611 else 612 outf = stdout; 613 614 if (seensubj) 615 putc('\n', outf); 616 617 while (fgets(inbuf, sizeof inbuf, newmsg)) { 618 fputs(inbuf, outf); 619 if (ferror(outf)) { 620 clearerr(outf); 621 break; 622 } 623 } 624 625 if (outf != stdout) { 626 pclose(outf); 627 signal(SIGPIPE, SIG_DFL); 628 signal(SIGQUIT, SIG_DFL); 629 } 630 else { 631 fflush(stdout); 632 } 633 634 /* force wait on output */ 635 tcdrain(fileno(stdout)); 636 } 637 638 void 639 onintr() 640 { 641 signal(SIGINT, onintr); 642 if (mailing) 643 unlink(fname); 644 if (sending) { 645 unlink(fname); 646 puts("--Killed--"); 647 exit(1); 648 } 649 if (printing) { 650 putchar('\n'); 651 if (hdrs) 652 exit(0); 653 sep = "Interrupt"; 654 if (newmsg) 655 fseek(newmsg, 0L, 2); 656 intrpflg = YES; 657 } 658 } 659 660 /* 661 * We have just gotten a susp. Suspend and prepare to resume. 662 */ 663 void 664 onsusp() 665 { 666 667 signal(SIGTSTP, SIG_DFL); 668 sigsetmask(0); 669 kill(0, SIGTSTP); 670 signal(SIGTSTP, onsusp); 671 if (!mailing) 672 longjmp(tstpbuf, 0); 673 } 674 675 linecnt(f) 676 FILE *f; 677 { 678 off_t oldpos = ftell(f); 679 int l = 0; 680 char lbuf[BUFSIZ]; 681 682 while (fgets(lbuf, sizeof lbuf, f)) 683 l++; 684 clearerr(f); 685 fseek(f, oldpos, 0); 686 return (l); 687 } 688 689 next(buf) 690 char *buf; 691 { 692 int i; 693 sscanf(buf, "%d", &i); 694 sprintf(buf, "Goto %d", i); 695 return(--i); 696 } 697 698 ask(prompt) 699 char *prompt; 700 { 701 char inch; 702 int n, cmsg; 703 off_t oldpos; 704 FILE *cpfrom, *cpto; 705 706 printf("%s ", prompt); 707 fflush(stdout); 708 intrpflg = NO; 709 (void) fgets(inbuf, sizeof inbuf, stdin); 710 if ((n = strlen(inbuf)) > 0 && inbuf[n - 1] == '\n') 711 inbuf[n - 1] = '\0'; 712 if (intrpflg) 713 inbuf[0] = 'x'; 714 715 /* 716 * Handle 'mail' and 'save' here. 717 */ 718 if ((inch = inbuf[0]) == 's' || inch == 'm') { 719 if (inbuf[1] == '-') 720 cmsg = prevmsg; 721 else if (isdigit(inbuf[1])) 722 cmsg = atoi(&inbuf[1]); 723 else 724 cmsg = msg; 725 sprintf(fname, "%s/%d", _PATH_MSGS, cmsg); 726 727 oldpos = ftell(newmsg); 728 729 cpfrom = fopen(fname, "r"); 730 if (!cpfrom) { 731 printf("Message %d not found\n", cmsg); 732 ask (prompt); 733 return; 734 } 735 736 if (inch == 's') { 737 in = nxtfld(inbuf); 738 if (*in) { 739 for (n=0; in[n] > ' '; n++) { /* sizeof fname? */ 740 fname[n] = in[n]; 741 } 742 fname[n] = NULL; 743 } 744 else 745 strcpy(fname, "Messages"); 746 } 747 else { 748 strcpy(fname, _PATH_TMP); 749 mktemp(fname); 750 sprintf(cmdbuf, _PATH_MAIL, fname); 751 mailing = YES; 752 } 753 cpto = fopen(fname, "a"); 754 if (!cpto) { 755 perror(fname); 756 mailing = NO; 757 fseek(newmsg, oldpos, 0); 758 ask(prompt); 759 return; 760 } 761 762 while (n = fread(inbuf, 1, sizeof inbuf, cpfrom)) 763 fwrite(inbuf, 1, n, cpto); 764 765 fclose(cpfrom); 766 fclose(cpto); 767 fseek(newmsg, oldpos, 0); /* reposition current message */ 768 if (inch == 's') 769 printf("Message %d saved in \"%s\"\n", cmsg, fname); 770 else { 771 system(cmdbuf); 772 unlink(fname); 773 mailing = NO; 774 } 775 ask(prompt); 776 } 777 } 778 779 gfrsub(infile) 780 FILE *infile; 781 { 782 off_t frompos; 783 784 seensubj = seenfrom = NO; 785 local = YES; 786 subj[0] = from[0] = date[0] = NULL; 787 788 /* 789 * Is this a normal message? 790 */ 791 if (fgets(inbuf, sizeof inbuf, infile)) { 792 if (strncmp(inbuf, "From", 4)==0) { 793 /* 794 * expected form starts with From 795 */ 796 seenfrom = YES; 797 frompos = ftell(infile); 798 ptr = from; 799 in = nxtfld(inbuf); 800 if (*in) while (*in && *in > ' ') { 801 if (*in == ':' || *in == '@' || *in == '!') 802 local = NO; 803 *ptr++ = *in++; 804 /* what about sizeof from ? */ 805 } 806 *ptr = NULL; 807 if (*(in = nxtfld(in))) 808 strncpy(date, in, sizeof date); 809 else { 810 date[0] = '\n'; 811 date[1] = NULL; 812 } 813 } 814 else { 815 /* 816 * not the expected form 817 */ 818 fseek(infile, 0L, 0); 819 return; 820 } 821 } 822 else 823 /* 824 * empty file ? 825 */ 826 return; 827 828 /* 829 * look for Subject line until EOF or a blank line 830 */ 831 while (fgets(inbuf, sizeof inbuf, infile) 832 && !(blankline = (inbuf[0] == '\n'))) { 833 /* 834 * extract Subject line 835 */ 836 if (!seensubj && strncmp(inbuf, "Subj", 4)==0) { 837 seensubj = YES; 838 frompos = ftell(infile); 839 strncpy(subj, nxtfld(inbuf), sizeof subj); 840 } 841 } 842 if (!blankline) 843 /* 844 * ran into EOF 845 */ 846 fseek(infile, frompos, 0); 847 848 if (!seensubj) 849 /* 850 * for possible use with Mail 851 */ 852 strncpy(subj, "(No Subject)\n", sizeof subj); 853 } 854 855 char * 856 nxtfld(s) 857 char *s; 858 { 859 if (*s) while (*s && *s > ' ') s++; /* skip over this field */ 860 if (*s) while (*s && *s <= ' ') s++; /* find start of next field */ 861 return (s); 862 } 863