msgs.c revision 1.10
1 /* $NetBSD: msgs.c,v 1.10 1997/10/14 01:28:52 lukem 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 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) 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 __RCSID("$NetBSD: msgs.c,v 1.10 1997/10/14 01:28:52 lukem 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 <ctype.h> 81 #include <dirent.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 <termcap.h> 90 #include <termios.h> 91 #include <time.h> 92 #include <unistd.h> 93 #include "pathnames.h" 94 95 #define CMODE 0664 /* bounds file creation mode */ 96 #define NO 0 97 #define YES 1 98 #define SUPERUSER 0 /* superuser uid */ 99 #define DAEMON 1 /* daemon uid */ 100 #define NLINES 24 /* default number of lines/crt screen */ 101 #define NDAYS 21 /* default keep time for messages */ 102 #define DAYS *24*60*60 /* seconds/day */ 103 #define MSGSRC ".msgsrc" /* user's rc file */ 104 #define BOUNDS "bounds" /* message bounds file */ 105 #define NEXT "Next message? [yq]" 106 #define MORE "More? [ynq]" 107 #define NOMORE "(No more) [q] ?" 108 109 typedef char bool; 110 111 FILE *msgsrc; 112 FILE *newmsg; 113 char *sep = "-"; 114 char inbuf[BUFSIZ]; 115 char fname[128]; 116 char cmdbuf[128]; 117 char subj[128]; 118 char from[128]; 119 char date[128]; 120 char *ptr; 121 char *in; 122 bool local; 123 bool ruptible; 124 bool totty; 125 bool seenfrom; 126 bool seensubj; 127 bool blankline; 128 bool printing = NO; 129 bool mailing = NO; 130 bool quitit = NO; 131 bool sending = NO; 132 bool intrpflg = NO; 133 bool restricted = NO; 134 int uid; 135 int msg; 136 int prevmsg; 137 int lct; 138 int nlines; 139 int Lpp = 0; 140 time_t t; 141 time_t keep; 142 143 void ask __P((char *)); 144 void gfrsub __P((FILE *)); 145 int linecnt __P((FILE *)); 146 int main __P((int, char *[])); 147 int next __P((char *)); 148 char *nxtfld __P((char *)); 149 void onintr __P((int)); 150 void onsusp __P((int)); 151 void prmesg __P((int)); 152 153 /* option initialization */ 154 bool hdrs = NO; 155 bool qopt = NO; 156 bool hush = NO; 157 bool send_msg = NO; 158 bool locomode = NO; 159 bool use_pager = NO; 160 bool clean = NO; 161 bool lastcmd = NO; 162 jmp_buf tstpbuf; 163 164 int 165 main(argc, argv) 166 int argc; char *argv[]; 167 { 168 bool newrc, already; 169 int rcfirst = 0; /* first message to print (from .rc) */ 170 int rcback = 0; /* amount to back off of rcfirst */ 171 int firstmsg, nextmsg, lastmsg = 0; 172 int blast = 0; 173 FILE *bounds; 174 175 #ifdef UNBUFFERED 176 setbuf(stdout, NULL); 177 #endif 178 179 time(&t); 180 setuid(uid = getuid()); 181 ruptible = (signal(SIGINT, SIG_IGN) == SIG_DFL); 182 if (ruptible) 183 signal(SIGINT, SIG_DFL); 184 185 argc--, argv++; 186 while (argc > 0) { 187 if (isdigit(argv[0][0])) { /* starting message # */ 188 rcfirst = atoi(argv[0]); 189 } 190 else if (isdigit(argv[0][1])) { /* backward offset */ 191 rcback = atoi( &( argv[0][1] ) ); 192 } 193 else { 194 ptr = *argv; 195 while (*ptr) switch (*ptr++) { 196 197 case '-': 198 break; 199 200 case 'c': 201 if (uid != SUPERUSER && uid != DAEMON) { 202 fprintf(stderr, "Sorry\n"); 203 exit(1); 204 } 205 clean = YES; 206 break; 207 208 case 'f': /* silently */ 209 hush = YES; 210 break; 211 212 case 'h': /* headers only */ 213 hdrs = YES; 214 break; 215 216 case 'l': /* local msgs only */ 217 locomode = YES; 218 break; 219 220 case 'o': /* option to save last message */ 221 lastcmd = YES; 222 break; 223 224 case 'p': /* pipe thru 'more' during long msgs */ 225 use_pager = YES; 226 break; 227 228 case 'q': /* query only */ 229 qopt = YES; 230 break; 231 232 case 'r': /* restricted */ 233 restricted = YES; 234 break; 235 236 237 case 's': /* sending TO msgs */ 238 send_msg = YES; 239 break; 240 241 default: 242 fprintf(stderr, 243 "usage: msgs [fhlopqr] [[-]number]\n"); 244 exit(1); 245 } 246 } 247 argc--, argv++; 248 } 249 250 /* 251 * determine current message bounds 252 */ 253 sprintf(fname, "%s/%s", _PATH_MSGS, BOUNDS); 254 bounds = fopen(fname, "r"); 255 256 if (bounds != NULL) { 257 if (fscanf(bounds, "%d %d\n", &firstmsg, &lastmsg) < 2) 258 firstmsg = lastmsg = 0; 259 fclose(bounds); 260 blast = lastmsg; /* save upper bound */ 261 } 262 263 if (clean) 264 keep = t - (rcback? rcback : NDAYS) DAYS; 265 266 if (clean || bounds == NULL) { /* relocate message bounds */ 267 struct dirent *dp; 268 struct stat stbuf; 269 bool seenany = NO; 270 DIR *dirp; 271 272 dirp = opendir(_PATH_MSGS); 273 if (dirp == NULL) { 274 perror(_PATH_MSGS); 275 exit(errno); 276 } 277 chmod(fname, CMODE); 278 279 firstmsg = 32767; 280 lastmsg = 0; 281 282 for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)){ 283 register char *cp = dp->d_name; 284 register int i = 0; 285 286 if (dp->d_ino == 0) 287 continue; 288 if (dp->d_namlen == 0) 289 continue; 290 291 if (clean) 292 sprintf(inbuf, "%s/%s", _PATH_MSGS, cp); 293 294 while (isdigit(*cp)) 295 i = i * 10 + *cp++ - '0'; 296 if (*cp) 297 continue; /* not a message! */ 298 299 if (clean) { 300 if (stat(inbuf, &stbuf) != 0) 301 continue; 302 if (stbuf.st_mtime < keep 303 && stbuf.st_mode&S_IWRITE) { 304 unlink(inbuf); 305 continue; 306 } 307 } 308 309 if (i > lastmsg) 310 lastmsg = i; 311 if (i < firstmsg) 312 firstmsg = i; 313 seenany = YES; 314 } 315 closedir(dirp); 316 317 if (!seenany) { 318 if (blast != 0) /* never lower the upper bound! */ 319 lastmsg = blast; 320 firstmsg = lastmsg + 1; 321 } 322 else if (blast > lastmsg) 323 lastmsg = blast; 324 325 if (!send_msg) { 326 bounds = fopen(fname, "w"); 327 if (bounds == NULL) { 328 perror(fname); 329 exit(errno); 330 } 331 chmod(fname, CMODE); 332 fprintf(bounds, "%d %d\n", firstmsg, lastmsg); 333 fclose(bounds); 334 } 335 } 336 337 if (send_msg) { 338 /* 339 * Send mode - place msgs in _PATH_MSGS 340 */ 341 bounds = fopen(fname, "w"); 342 if (bounds == NULL) { 343 perror(fname); 344 exit(errno); 345 } 346 347 nextmsg = lastmsg + 1; 348 sprintf(fname, "%s/%d", _PATH_MSGS, nextmsg); 349 newmsg = fopen(fname, "w"); 350 if (newmsg == NULL) { 351 perror(fname); 352 exit(errno); 353 } 354 chmod(fname, 0644); 355 356 fprintf(bounds, "%d %d\n", firstmsg, nextmsg); 357 fclose(bounds); 358 359 sending = YES; 360 if (ruptible) 361 signal(SIGINT, onintr); 362 363 if (isatty(fileno(stdin))) { 364 ptr = getpwuid(uid)->pw_name; 365 printf("Message %d:\nFrom %s %sSubject: ", 366 nextmsg, ptr, ctime(&t)); 367 fflush(stdout); 368 fgets(inbuf, sizeof inbuf, stdin); 369 putchar('\n'); 370 fflush(stdout); 371 fprintf(newmsg, "From %s %sSubject: %s\n", 372 ptr, ctime(&t), inbuf); 373 blankline = seensubj = YES; 374 } 375 else 376 blankline = seensubj = NO; 377 for (;;) { 378 fgets(inbuf, sizeof inbuf, stdin); 379 if (feof(stdin) || ferror(stdin)) 380 break; 381 blankline = (blankline || (inbuf[0] == '\n')); 382 seensubj = (seensubj || (!blankline && (strncmp(inbuf, "Subj", 4) == 0))); 383 fputs(inbuf, newmsg); 384 } 385 #ifdef OBJECT 386 if (!seensubj) { 387 printf("NOTICE: Messages should have a Subject field!\n"); 388 #ifdef REJECT 389 unlink(fname); 390 #endif 391 exit(1); 392 } 393 #endif 394 exit(ferror(stdin)); 395 } 396 if (clean) 397 exit(0); 398 399 /* 400 * prepare to display messages 401 */ 402 totty = (isatty(fileno(stdout)) != 0); 403 use_pager = use_pager && totty; 404 405 sprintf(fname, "%s/%s", getenv("HOME"), MSGSRC); 406 msgsrc = fopen(fname, "r"); 407 if (msgsrc) { 408 newrc = NO; 409 fscanf(msgsrc, "%d\n", &nextmsg); 410 fclose(msgsrc); 411 if (nextmsg > lastmsg+1) { 412 printf("Warning: bounds have been reset (%d, %d)\n", 413 firstmsg, lastmsg); 414 truncate(fname, (off_t)0); 415 newrc = YES; 416 } 417 else if (!rcfirst) 418 rcfirst = nextmsg - rcback; 419 } 420 else 421 newrc = YES; 422 msgsrc = fopen(fname, "r+"); 423 if (msgsrc == NULL) 424 msgsrc = fopen(fname, "w"); 425 if (msgsrc == NULL) { 426 perror(fname); 427 exit(errno); 428 } 429 if (rcfirst) { 430 if (rcfirst > lastmsg+1) { 431 printf("Warning: the last message is number %d.\n", 432 lastmsg); 433 rcfirst = nextmsg; 434 } 435 if (rcfirst > firstmsg) 436 firstmsg = rcfirst; /* don't set below first msg */ 437 } 438 if (newrc) { 439 nextmsg = firstmsg; 440 fseek(msgsrc, 0L, 0); 441 fprintf(msgsrc, "%d\n", nextmsg); 442 fflush(msgsrc); 443 } 444 445 #ifdef V7 446 if (totty) { 447 struct winsize win; 448 if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1) 449 Lpp = win.ws_row; 450 if (Lpp <= 0) { 451 if (tgetent(inbuf, getenv("TERM")) <= 0 452 || (Lpp = tgetnum("li")) <= 0) { 453 Lpp = NLINES; 454 } 455 } 456 } 457 #endif 458 Lpp -= 6; /* for headers, etc. */ 459 460 already = NO; 461 prevmsg = firstmsg; 462 printing = YES; 463 if (ruptible) 464 signal(SIGINT, onintr); 465 466 /* 467 * Main program loop 468 */ 469 for (msg = firstmsg; msg <= lastmsg; msg++) { 470 471 sprintf(fname, "%s/%d", _PATH_MSGS, msg); 472 newmsg = fopen(fname, "r"); 473 if (newmsg == NULL) 474 continue; 475 476 gfrsub(newmsg); /* get From and Subject fields */ 477 if (locomode && !local) { 478 fclose(newmsg); 479 continue; 480 } 481 482 if (qopt) { /* This has to be located here */ 483 printf("There are new messages.\n"); 484 exit(0); 485 } 486 487 if (already && !hdrs) 488 putchar('\n'); 489 490 /* 491 * Print header 492 */ 493 if (totty) 494 signal(SIGTSTP, onsusp); 495 (void) setjmp(tstpbuf); 496 already = YES; 497 nlines = 2; 498 if (seenfrom) { 499 printf("Message %d:\nFrom %s %s", msg, from, date); 500 nlines++; 501 } 502 if (seensubj) { 503 printf("Subject: %s", subj); 504 nlines++; 505 } 506 else { 507 if (seenfrom) { 508 putchar('\n'); 509 nlines++; 510 } 511 while (nlines < 6 512 && fgets(inbuf, sizeof inbuf, newmsg) 513 && inbuf[0] != '\n') { 514 fputs(inbuf, stdout); 515 nlines++; 516 } 517 } 518 519 lct = linecnt(newmsg); 520 if (lct) 521 printf("(%d%slines) ", lct, seensubj? " " : " more "); 522 523 if (hdrs) { 524 printf("\n-----\n"); 525 fclose(newmsg); 526 continue; 527 } 528 529 /* 530 * Ask user for command 531 */ 532 if (totty) 533 ask(lct? MORE : (msg==lastmsg? NOMORE : NEXT)); 534 else 535 inbuf[0] = 'y'; 536 if (totty) 537 signal(SIGTSTP, SIG_DFL); 538 cmnd: 539 in = inbuf; 540 switch (*in) { 541 case 'x': 542 case 'X': 543 exit(0); 544 545 case 'q': 546 case 'Q': 547 quitit = YES; 548 printf("--Postponed--\n"); 549 exit(0); 550 /* intentional fall-thru */ 551 case 'n': 552 case 'N': 553 if (msg >= nextmsg) sep = "Flushed"; 554 prevmsg = msg; 555 break; 556 557 case 'p': 558 case 'P': 559 use_pager = (*in++ == 'p'); 560 /* intentional fallthru */ 561 case '\n': 562 case 'y': 563 default: 564 if (*in == '-') { 565 msg = prevmsg-1; 566 sep = "replay"; 567 break; 568 } 569 if (isdigit(*in)) { 570 msg = next(in); 571 sep = in; 572 break; 573 } 574 575 prmesg(nlines + lct + (seensubj? 1 : 0)); 576 prevmsg = msg; 577 578 } 579 580 printf("--%s--\n", sep); 581 sep = "-"; 582 if (msg >= nextmsg) { 583 nextmsg = msg + 1; 584 fseek(msgsrc, 0L, 0); 585 fprintf(msgsrc, "%d\n", nextmsg); 586 fflush(msgsrc); 587 } 588 if (newmsg) 589 fclose(newmsg); 590 if (quitit) 591 break; 592 } 593 594 /* 595 * Make sure .rc file gets updated 596 */ 597 if (--msg >= nextmsg) { 598 nextmsg = msg + 1; 599 fseek(msgsrc, 0L, 0); 600 fprintf(msgsrc, "%d\n", nextmsg); 601 fflush(msgsrc); 602 } 603 if (already && !quitit && lastcmd && totty) { 604 /* 605 * save or reply to last message? 606 */ 607 msg = prevmsg; 608 ask(NOMORE); 609 if (inbuf[0] == '-' || isdigit(inbuf[0])) 610 goto cmnd; 611 } 612 if (!(already || hush || qopt)) 613 printf("No new messages.\n"); 614 exit(0); 615 } 616 617 void 618 prmesg(length) 619 int length; 620 { 621 FILE *outf; 622 char *env_pager; 623 624 if (use_pager && length > Lpp) { 625 signal(SIGPIPE, SIG_IGN); 626 signal(SIGQUIT, SIG_IGN); 627 if ((env_pager = getenv("PAGER")) == NULL) { 628 sprintf(cmdbuf, _PATH_PAGER, Lpp); 629 } else { 630 strcpy(cmdbuf, env_pager); 631 } 632 outf = popen(cmdbuf, "w"); 633 if (!outf) 634 outf = stdout; 635 else 636 setbuf(outf, (char *)NULL); 637 } 638 else 639 outf = stdout; 640 641 if (seensubj) 642 putc('\n', outf); 643 644 while (fgets(inbuf, sizeof inbuf, newmsg)) { 645 fputs(inbuf, outf); 646 if (ferror(outf)) { 647 clearerr(outf); 648 break; 649 } 650 } 651 652 if (outf != stdout) { 653 pclose(outf); 654 signal(SIGPIPE, SIG_DFL); 655 signal(SIGQUIT, SIG_DFL); 656 } 657 else { 658 fflush(stdout); 659 } 660 661 /* trick to force wait on output */ 662 tcdrain(fileno(stdout)); 663 } 664 665 void 666 onintr(dummy) 667 int dummy; 668 { 669 signal(SIGINT, onintr); 670 if (mailing) 671 unlink(fname); 672 if (sending) { 673 unlink(fname); 674 puts("--Killed--"); 675 exit(1); 676 } 677 if (printing) { 678 putchar('\n'); 679 if (hdrs) 680 exit(0); 681 sep = "Interrupt"; 682 if (newmsg) 683 fseek(newmsg, 0L, 2); 684 intrpflg = YES; 685 } 686 } 687 688 /* 689 * We have just gotten a susp. Suspend and prepare to resume. 690 */ 691 void 692 onsusp(dummy) 693 int dummy; 694 { 695 696 signal(SIGTSTP, SIG_DFL); 697 sigsetmask(0); 698 kill(0, SIGTSTP); 699 signal(SIGTSTP, onsusp); 700 if (!mailing) 701 longjmp(tstpbuf, 0); 702 } 703 704 int 705 linecnt(f) 706 FILE *f; 707 { 708 off_t oldpos = ftell(f); 709 int l = 0; 710 char lbuf[BUFSIZ]; 711 712 while (fgets(lbuf, sizeof lbuf, f)) 713 l++; 714 clearerr(f); 715 fseek(f, oldpos, 0); 716 return (l); 717 } 718 719 int 720 next(buf) 721 char *buf; 722 { 723 int i; 724 sscanf(buf, "%d", &i); 725 sprintf(buf, "Goto %d", i); 726 return(--i); 727 } 728 729 void 730 ask(prompt) 731 char *prompt; 732 { 733 char inch; 734 int n, cmsg; 735 off_t oldpos; 736 FILE *cpfrom, *cpto; 737 738 printf("%s ", prompt); 739 fflush(stdout); 740 intrpflg = NO; 741 (void) fgets(inbuf, sizeof inbuf, stdin); 742 if ((n = strlen(inbuf)) > 0 && inbuf[n - 1] == '\n') 743 inbuf[n - 1] = '\0'; 744 if (intrpflg) 745 inbuf[0] = 'x'; 746 747 /* 748 * Handle 'mail' and 'save' here. 749 */ 750 if (((inch = inbuf[0]) == 's' || inch == 'm') && !restricted) { 751 if (inbuf[1] == '-') 752 cmsg = prevmsg; 753 else if (isdigit(inbuf[1])) 754 cmsg = atoi(&inbuf[1]); 755 else 756 cmsg = msg; 757 sprintf(fname, "%s/%d", _PATH_MSGS, cmsg); 758 759 oldpos = ftell(newmsg); 760 761 cpfrom = fopen(fname, "r"); 762 if (!cpfrom) { 763 printf("Message %d not found\n", cmsg); 764 ask (prompt); 765 return; 766 } 767 768 if (inch == 's') { 769 in = nxtfld(inbuf); 770 if (*in) { 771 for (n=0; in[n] > ' '; n++) { /* sizeof fname? */ 772 fname[n] = in[n]; 773 } 774 fname[n] = '\0'; 775 } 776 else 777 strcpy(fname, "Messages"); 778 } 779 else { 780 strcpy(fname, _PATH_TMP); 781 mktemp(fname); 782 sprintf(cmdbuf, _PATH_MAIL, fname); 783 mailing = YES; 784 } 785 cpto = fopen(fname, "a"); 786 if (!cpto) { 787 perror(fname); 788 mailing = NO; 789 fseek(newmsg, oldpos, 0); 790 ask(prompt); 791 return; 792 } 793 794 while ((n = fread(inbuf, 1, sizeof inbuf, cpfrom)) != 0) 795 fwrite(inbuf, 1, n, cpto); 796 797 fclose(cpfrom); 798 fclose(cpto); 799 fseek(newmsg, oldpos, 0); /* reposition current message */ 800 if (inch == 's') 801 printf("Message %d saved in \"%s\"\n", cmsg, fname); 802 else { 803 system(cmdbuf); 804 unlink(fname); 805 mailing = NO; 806 } 807 ask(prompt); 808 } 809 } 810 811 void 812 gfrsub(infile) 813 FILE *infile; 814 { 815 off_t frompos; 816 817 seensubj = seenfrom = NO; 818 local = YES; 819 subj[0] = from[0] = date[0] = 0; 820 821 /* 822 * Is this a normal message? 823 */ 824 if (fgets(inbuf, sizeof inbuf, infile)) { 825 if (strncmp(inbuf, "From", 4)==0) { 826 /* 827 * expected form starts with From 828 */ 829 seenfrom = YES; 830 frompos = ftell(infile); 831 ptr = from; 832 in = nxtfld(inbuf); 833 if (*in) while (*in && *in > ' ') { 834 if (*in == ':' || *in == '@' || *in == '!') 835 local = NO; 836 *ptr++ = *in++; 837 /* what about sizeof from ? */ 838 } 839 *ptr = '\0'; 840 if (*(in = nxtfld(in))) 841 strncpy(date, in, sizeof date); 842 else { 843 date[0] = '\n'; 844 date[1] = '\0'; 845 } 846 } 847 else { 848 /* 849 * not the expected form 850 */ 851 fseek(infile, 0L, 0); 852 return; 853 } 854 } 855 else 856 /* 857 * empty file ? 858 */ 859 return; 860 861 /* 862 * look for Subject line until EOF or a blank line 863 */ 864 while (fgets(inbuf, sizeof inbuf, infile) 865 && !(blankline = (inbuf[0] == '\n'))) { 866 /* 867 * extract Subject line 868 */ 869 if (!seensubj && strncmp(inbuf, "Subj", 4)==0) { 870 seensubj = YES; 871 frompos = ftell(infile); 872 strncpy(subj, nxtfld(inbuf), sizeof subj); 873 } 874 } 875 if (!blankline) 876 /* 877 * ran into EOF 878 */ 879 fseek(infile, frompos, 0); 880 881 if (!seensubj) 882 /* 883 * for possible use with Mail 884 */ 885 strncpy(subj, "(No Subject)\n", sizeof subj); 886 } 887 888 char * 889 nxtfld(s) 890 char *s; 891 { 892 if (*s) while (*s && *s > ' ') s++; /* skip over this field */ 893 if (*s) while (*s && *s <= ' ') s++; /* find start of next field */ 894 return (s); 895 } 896
Indexes created Thu Sep 25 16:09:42 GMT 2025