msgs.c revision 1.1
1 /*- 2 * Copyright (c) 1980 The 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 char copyright[] = 36 "@(#) Copyright (c) 1980 The Regents of the University of California.\n\ 37 All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 static char sccsid[] = "@(#)msgs.c 5.8 (Berkeley) 2/4/91"; 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 <sgtty.h> 79 #include <signal.h> 80 #include <stdio.h> 81 #include <stdlib.h> 82 #include <string.h> 83 #include <time.h> 84 #include "pathnames.h" 85 86 #define CMODE 0666 /* bounds file creation mode */ 87 #define NO 0 88 #define YES 1 89 #define SUPERUSER 0 /* superuser uid */ 90 #define DAEMON 1 /* daemon uid */ 91 #define NLINES 24 /* default number of lines/crt screen */ 92 #define NDAYS 21 /* default keep time for messages */ 93 #define DAYS *24*60*60 /* seconds/day */ 94 #define MSGSRC ".msgsrc" /* user's rc file */ 95 #define BOUNDS "bounds" /* message bounds file */ 96 #define NEXT "Next message? [yq]" 97 #define MORE "More? [ynq]" 98 #define NOMORE "(No more) [q] ?" 99 100 typedef char bool; 101 102 FILE *msgsrc; 103 FILE *newmsg; 104 char *sep = "-"; 105 char inbuf[BUFSIZ]; 106 char fname[128]; 107 char cmdbuf[128]; 108 char subj[128]; 109 char from[128]; 110 char date[128]; 111 char *ptr; 112 char *in; 113 bool local; 114 bool ruptible; 115 bool totty; 116 bool seenfrom; 117 bool seensubj; 118 bool blankline; 119 bool printing = NO; 120 bool mailing = NO; 121 bool quitit = NO; 122 bool sending = NO; 123 bool intrpflg = NO; 124 int uid; 125 int msg; 126 int prevmsg; 127 int lct; 128 int nlines; 129 int Lpp = 0; 130 time_t t; 131 time_t keep; 132 struct sgttyb otty; 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 gtty(fileno(stdout), &otty); 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, 0644); 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, "a"); 402 if (msgsrc == NULL) { 403 perror(fname); 404 exit(errno); 405 } 406 if (rcfirst) { 407 if (rcfirst > lastmsg+1) { 408 printf("Warning: the last message is number %d.\n", 409 lastmsg); 410 rcfirst = nextmsg; 411 } 412 if (rcfirst > firstmsg) 413 firstmsg = rcfirst; /* don't set below first msg */ 414 } 415 if (newrc) { 416 nextmsg = firstmsg; 417 fseek(msgsrc, 0L, 0); 418 fprintf(msgsrc, "%d\n", nextmsg); 419 fflush(msgsrc); 420 } 421 422 #ifdef V7 423 if (totty) { 424 struct winsize win; 425 if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1) 426 Lpp = win.ws_row; 427 if (Lpp <= 0) { 428 if (tgetent(inbuf, getenv("TERM")) <= 0 429 || (Lpp = tgetnum("li")) <= 0) { 430 Lpp = NLINES; 431 } 432 } 433 } 434 #endif 435 Lpp -= 6; /* for headers, etc. */ 436 437 already = NO; 438 prevmsg = firstmsg; 439 printing = YES; 440 if (ruptible) 441 signal(SIGINT, onintr); 442 443 /* 444 * Main program loop 445 */ 446 for (msg = firstmsg; msg <= lastmsg; msg++) { 447 448 sprintf(fname, "%s/%d", _PATH_MSGS, msg); 449 newmsg = fopen(fname, "r"); 450 if (newmsg == NULL) 451 continue; 452 453 gfrsub(newmsg); /* get From and Subject fields */ 454 if (locomode && !local) { 455 fclose(newmsg); 456 continue; 457 } 458 459 if (qopt) { /* This has to be located here */ 460 printf("There are new messages.\n"); 461 exit(0); 462 } 463 464 if (already && !hdrs) 465 putchar('\n'); 466 467 /* 468 * Print header 469 */ 470 if (totty) 471 signal(SIGTSTP, onsusp); 472 (void) setjmp(tstpbuf); 473 already = YES; 474 nlines = 2; 475 if (seenfrom) { 476 printf("Message %d:\nFrom %s %s", msg, from, date); 477 nlines++; 478 } 479 if (seensubj) { 480 printf("Subject: %s", subj); 481 nlines++; 482 } 483 else { 484 if (seenfrom) { 485 putchar('\n'); 486 nlines++; 487 } 488 while (nlines < 6 489 && fgets(inbuf, sizeof inbuf, newmsg) 490 && inbuf[0] != '\n') { 491 fputs(inbuf, stdout); 492 nlines++; 493 } 494 } 495 496 lct = linecnt(newmsg); 497 if (lct) 498 printf("(%d%slines) ", lct, seensubj? " " : " more "); 499 500 if (hdrs) { 501 printf("\n-----\n"); 502 fclose(newmsg); 503 continue; 504 } 505 506 /* 507 * Ask user for command 508 */ 509 if (totty) 510 ask(lct? MORE : (msg==lastmsg? NOMORE : NEXT)); 511 else 512 inbuf[0] = 'y'; 513 if (totty) 514 signal(SIGTSTP, SIG_DFL); 515 cmnd: 516 in = inbuf; 517 switch (*in) { 518 case 'x': 519 case 'X': 520 exit(0); 521 522 case 'q': 523 case 'Q': 524 quitit = YES; 525 printf("--Postponed--\n"); 526 exit(0); 527 /* intentional fall-thru */ 528 case 'n': 529 case 'N': 530 if (msg >= nextmsg) sep = "Flushed"; 531 prevmsg = msg; 532 break; 533 534 case 'p': 535 case 'P': 536 use_pager = (*in++ == 'p'); 537 /* intentional fallthru */ 538 case '\n': 539 case 'y': 540 default: 541 if (*in == '-') { 542 msg = prevmsg-1; 543 sep = "replay"; 544 break; 545 } 546 if (isdigit(*in)) { 547 msg = next(in); 548 sep = in; 549 break; 550 } 551 552 prmesg(nlines + lct + (seensubj? 1 : 0)); 553 prevmsg = msg; 554 555 } 556 557 printf("--%s--\n", sep); 558 sep = "-"; 559 if (msg >= nextmsg) { 560 nextmsg = msg + 1; 561 fseek(msgsrc, 0L, 0); 562 fprintf(msgsrc, "%d\n", nextmsg); 563 fflush(msgsrc); 564 } 565 if (newmsg) 566 fclose(newmsg); 567 if (quitit) 568 break; 569 } 570 571 /* 572 * Make sure .rc file gets updated 573 */ 574 if (--msg >= nextmsg) { 575 nextmsg = msg + 1; 576 fseek(msgsrc, 0L, 0); 577 fprintf(msgsrc, "%d\n", nextmsg); 578 fflush(msgsrc); 579 } 580 if (already && !quitit && lastcmd && totty) { 581 /* 582 * save or reply to last message? 583 */ 584 msg = prevmsg; 585 ask(NOMORE); 586 if (inbuf[0] == '-' || isdigit(inbuf[0])) 587 goto cmnd; 588 } 589 if (!(already || hush || qopt)) 590 printf("No new messages.\n"); 591 exit(0); 592 } 593 594 prmesg(length) 595 int length; 596 { 597 FILE *outf; 598 599 if (use_pager && length > Lpp) { 600 signal(SIGPIPE, SIG_IGN); 601 signal(SIGQUIT, SIG_IGN); 602 sprintf(cmdbuf, _PATH_PAGER, Lpp); 603 outf = popen(cmdbuf, "w"); 604 if (!outf) 605 outf = stdout; 606 else 607 setbuf(outf, (char *)NULL); 608 } 609 else 610 outf = stdout; 611 612 if (seensubj) 613 putc('\n', outf); 614 615 while (fgets(inbuf, sizeof inbuf, newmsg)) { 616 fputs(inbuf, outf); 617 if (ferror(outf)) { 618 clearerr(outf); 619 break; 620 } 621 } 622 623 if (outf != stdout) { 624 pclose(outf); 625 signal(SIGPIPE, SIG_DFL); 626 signal(SIGQUIT, SIG_DFL); 627 } 628 else { 629 fflush(stdout); 630 } 631 632 /* trick to force wait on output */ 633 stty(fileno(stdout), &otty); 634 } 635 636 void 637 onintr() 638 { 639 signal(SIGINT, onintr); 640 if (mailing) 641 unlink(fname); 642 if (sending) { 643 unlink(fname); 644 puts("--Killed--"); 645 exit(1); 646 } 647 if (printing) { 648 putchar('\n'); 649 if (hdrs) 650 exit(0); 651 sep = "Interrupt"; 652 if (newmsg) 653 fseek(newmsg, 0L, 2); 654 intrpflg = YES; 655 } 656 } 657 658 /* 659 * We have just gotten a susp. Suspend and prepare to resume. 660 */ 661 void 662 onsusp() 663 { 664 665 signal(SIGTSTP, SIG_DFL); 666 sigsetmask(0); 667 kill(0, SIGTSTP); 668 signal(SIGTSTP, onsusp); 669 if (!mailing) 670 longjmp(tstpbuf, 0); 671 } 672 673 linecnt(f) 674 FILE *f; 675 { 676 off_t oldpos = ftell(f); 677 int l = 0; 678 char lbuf[BUFSIZ]; 679 680 while (fgets(lbuf, sizeof lbuf, f)) 681 l++; 682 clearerr(f); 683 fseek(f, oldpos, 0); 684 return (l); 685 } 686 687 next(buf) 688 char *buf; 689 { 690 int i; 691 sscanf(buf, "%d", &i); 692 sprintf(buf, "Goto %d", i); 693 return(--i); 694 } 695 696 ask(prompt) 697 char *prompt; 698 { 699 char inch; 700 int n, cmsg; 701 off_t oldpos; 702 FILE *cpfrom, *cpto; 703 704 printf("%s ", prompt); 705 fflush(stdout); 706 intrpflg = NO; 707 (void) fgets(inbuf, sizeof inbuf, stdin); 708 if ((n = strlen(inbuf)) > 0 && inbuf[n - 1] == '\n') 709 inbuf[n - 1] = '\0'; 710 if (intrpflg) 711 inbuf[0] = 'x'; 712 713 /* 714 * Handle 'mail' and 'save' here. 715 */ 716 if ((inch = inbuf[0]) == 's' || inch == 'm') { 717 if (inbuf[1] == '-') 718 cmsg = prevmsg; 719 else if (isdigit(inbuf[1])) 720 cmsg = atoi(&inbuf[1]); 721 else 722 cmsg = msg; 723 sprintf(fname, "%s/%d", _PATH_MSGS, cmsg); 724 725 oldpos = ftell(newmsg); 726 727 cpfrom = fopen(fname, "r"); 728 if (!cpfrom) { 729 printf("Message %d not found\n", cmsg); 730 ask (prompt); 731 return; 732 } 733 734 if (inch == 's') { 735 in = nxtfld(inbuf); 736 if (*in) { 737 for (n=0; in[n] > ' '; n++) { /* sizeof fname? */ 738 fname[n] = in[n]; 739 } 740 fname[n] = NULL; 741 } 742 else 743 strcpy(fname, "Messages"); 744 } 745 else { 746 strcpy(fname, _PATH_TMP); 747 mktemp(fname); 748 sprintf(cmdbuf, _PATH_MAIL, fname); 749 mailing = YES; 750 } 751 cpto = fopen(fname, "a"); 752 if (!cpto) { 753 perror(fname); 754 mailing = NO; 755 fseek(newmsg, oldpos, 0); 756 ask(prompt); 757 return; 758 } 759 760 while (n = fread(inbuf, 1, sizeof inbuf, cpfrom)) 761 fwrite(inbuf, 1, n, cpto); 762 763 fclose(cpfrom); 764 fclose(cpto); 765 fseek(newmsg, oldpos, 0); /* reposition current message */ 766 if (inch == 's') 767 printf("Message %d saved in \"%s\"\n", cmsg, fname); 768 else { 769 system(cmdbuf); 770 unlink(fname); 771 mailing = NO; 772 } 773 ask(prompt); 774 } 775 } 776 777 gfrsub(infile) 778 FILE *infile; 779 { 780 off_t frompos; 781 782 seensubj = seenfrom = NO; 783 local = YES; 784 subj[0] = from[0] = date[0] = NULL; 785 786 /* 787 * Is this a normal message? 788 */ 789 if (fgets(inbuf, sizeof inbuf, infile)) { 790 if (strncmp(inbuf, "From", 4)==0) { 791 /* 792 * expected form starts with From 793 */ 794 seenfrom = YES; 795 frompos = ftell(infile); 796 ptr = from; 797 in = nxtfld(inbuf); 798 if (*in) while (*in && *in > ' ') { 799 if (*in == ':' || *in == '@' || *in == '!') 800 local = NO; 801 *ptr++ = *in++; 802 /* what about sizeof from ? */ 803 } 804 *ptr = NULL; 805 if (*(in = nxtfld(in))) 806 strncpy(date, in, sizeof date); 807 else { 808 date[0] = '\n'; 809 date[1] = NULL; 810 } 811 } 812 else { 813 /* 814 * not the expected form 815 */ 816 fseek(infile, 0L, 0); 817 return; 818 } 819 } 820 else 821 /* 822 * empty file ? 823 */ 824 return; 825 826 /* 827 * look for Subject line until EOF or a blank line 828 */ 829 while (fgets(inbuf, sizeof inbuf, infile) 830 && !(blankline = (inbuf[0] == '\n'))) { 831 /* 832 * extract Subject line 833 */ 834 if (!seensubj && strncmp(inbuf, "Subj", 4)==0) { 835 seensubj = YES; 836 frompos = ftell(infile); 837 strncpy(subj, nxtfld(inbuf), sizeof subj); 838 } 839 } 840 if (!blankline) 841 /* 842 * ran into EOF 843 */ 844 fseek(infile, frompos, 0); 845 846 if (!seensubj) 847 /* 848 * for possible use with Mail 849 */ 850 strncpy(subj, "(No Subject)\n", sizeof subj); 851 } 852 853 char * 854 nxtfld(s) 855 char *s; 856 { 857 if (*s) while (*s && *s > ' ') s++; /* skip over this field */ 858 if (*s) while (*s && *s <= ' ') s++; /* find start of next field */ 859 return (s); 860 } 861
Indexes created Wed Sep 24 05:09:52 GMT 2025