msgs.c revision 1.12
1 /* $NetBSD: msgs.c,v 1.12 1998/07/26 22:14:34 mycroft 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 1.12 1998/07/26 22:14:34 mycroft 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 struct passwd *pw; 175 176 #ifdef UNBUFFERED 177 setbuf(stdout, NULL); 178 #endif 179 180 time(&t); 181 setuid(uid = getuid()); 182 ruptible = (signal(SIGINT, SIG_IGN) == SIG_DFL); 183 if (ruptible) 184 signal(SIGINT, SIG_DFL); 185 186 argc--, argv++; 187 while (argc > 0) { 188 if (isdigit(argv[0][0])) { /* starting message # */ 189 rcfirst = atoi(argv[0]); 190 } 191 else if (isdigit(argv[0][1])) { /* backward offset */ 192 rcback = atoi( &( argv[0][1] ) ); 193 } 194 else { 195 ptr = *argv; 196 while (*ptr) switch (*ptr++) { 197 198 case '-': 199 break; 200 201 case 'c': 202 if (uid != SUPERUSER && uid != DAEMON) { 203 fprintf(stderr, "Sorry\n"); 204 exit(1); 205 } 206 clean = YES; 207 break; 208 209 case 'f': /* silently */ 210 hush = YES; 211 break; 212 213 case 'h': /* headers only */ 214 hdrs = YES; 215 break; 216 217 case 'l': /* local msgs only */ 218 locomode = YES; 219 break; 220 221 case 'o': /* option to save last message */ 222 lastcmd = YES; 223 break; 224 225 case 'p': /* pipe thru 'more' during long msgs */ 226 use_pager = YES; 227 break; 228 229 case 'q': /* query only */ 230 qopt = YES; 231 break; 232 233 case 'r': /* restricted */ 234 restricted = YES; 235 break; 236 237 238 case 's': /* sending TO msgs */ 239 send_msg = YES; 240 break; 241 242 default: 243 fprintf(stderr, 244 "usage: msgs [fhlopqr] [[-]number]\n"); 245 exit(1); 246 } 247 } 248 argc--, argv++; 249 } 250 251 /* 252 * determine current message bounds 253 */ 254 sprintf(fname, "%s/%s", _PATH_MSGS, BOUNDS); 255 bounds = fopen(fname, "r"); 256 257 if (bounds != NULL) { 258 if (fscanf(bounds, "%d %d\n", &firstmsg, &lastmsg) < 2) 259 firstmsg = lastmsg = 0; 260 fclose(bounds); 261 blast = lastmsg; /* save upper bound */ 262 } 263 264 if (clean) 265 keep = t - (rcback? rcback : NDAYS) DAYS; 266 267 if (clean || bounds == NULL) { /* relocate message bounds */ 268 struct dirent *dp; 269 struct stat stbuf; 270 bool seenany = NO; 271 DIR *dirp; 272 273 dirp = opendir(_PATH_MSGS); 274 if (dirp == NULL) { 275 perror(_PATH_MSGS); 276 exit(errno); 277 } 278 chmod(fname, CMODE); 279 280 firstmsg = 32767; 281 lastmsg = 0; 282 283 for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)){ 284 char *cp = dp->d_name; 285 int i = 0; 286 287 if (dp->d_ino == 0) 288 continue; 289 if (dp->d_namlen == 0) 290 continue; 291 292 if (clean) 293 sprintf(inbuf, "%s/%s", _PATH_MSGS, cp); 294 295 while (isdigit(*cp)) 296 i = i * 10 + *cp++ - '0'; 297 if (*cp) 298 continue; /* not a message! */ 299 300 if (clean) { 301 if (stat(inbuf, &stbuf) != 0) 302 continue; 303 if (stbuf.st_mtime < keep 304 && stbuf.st_mode&S_IWRITE) { 305 unlink(inbuf); 306 continue; 307 } 308 } 309 310 if (i > lastmsg) 311 lastmsg = i; 312 if (i < firstmsg) 313 firstmsg = i; 314 seenany = YES; 315 } 316 closedir(dirp); 317 318 if (!seenany) { 319 if (blast != 0) /* never lower the upper bound! */ 320 lastmsg = blast; 321 firstmsg = lastmsg + 1; 322 } 323 else if (blast > lastmsg) 324 lastmsg = blast; 325 326 if (!send_msg) { 327 bounds = fopen(fname, "w"); 328 if (bounds == NULL) { 329 perror(fname); 330 exit(errno); 331 } 332 chmod(fname, CMODE); 333 fprintf(bounds, "%d %d\n", firstmsg, lastmsg); 334 fclose(bounds); 335 } 336 } 337 338 if (send_msg) { 339 /* 340 * Send mode - place msgs in _PATH_MSGS 341 */ 342 bounds = fopen(fname, "w"); 343 if (bounds == NULL) { 344 perror(fname); 345 exit(errno); 346 } 347 348 nextmsg = lastmsg + 1; 349 sprintf(fname, "%s/%d", _PATH_MSGS, nextmsg); 350 newmsg = fopen(fname, "w"); 351 if (newmsg == NULL) { 352 perror(fname); 353 exit(errno); 354 } 355 chmod(fname, 0644); 356 357 fprintf(bounds, "%d %d\n", firstmsg, nextmsg); 358 fclose(bounds); 359 360 sending = YES; 361 if (ruptible) 362 signal(SIGINT, onintr); 363 364 if (isatty(fileno(stdin))) { 365 pw = getpwuid(uid); 366 if (!pw) { 367 fprintf(stderr, "Who are you?\n"); 368 exit(1); 369 } 370 printf("Message %d:\nFrom %s %sSubject: ", 371 nextmsg, pw->pw_name, ctime(&t)); 372 fflush(stdout); 373 fgets(inbuf, sizeof inbuf, stdin); 374 putchar('\n'); 375 fflush(stdout); 376 fprintf(newmsg, "From %s %sSubject: %s\n", 377 ptr, ctime(&t), inbuf); 378 blankline = seensubj = YES; 379 } 380 else 381 blankline = seensubj = NO; 382 for (;;) { 383 fgets(inbuf, sizeof inbuf, stdin); 384 if (feof(stdin) || ferror(stdin)) 385 break; 386 blankline = (blankline || (inbuf[0] == '\n')); 387 seensubj = (seensubj || (!blankline && (strncmp(inbuf, "Subj", 4) == 0))); 388 fputs(inbuf, newmsg); 389 } 390 #ifdef OBJECT 391 if (!seensubj) { 392 printf("NOTICE: Messages should have a Subject field!\n"); 393 #ifdef REJECT 394 unlink(fname); 395 #endif 396 exit(1); 397 } 398 #endif 399 exit(ferror(stdin)); 400 } 401 if (clean) 402 exit(0); 403 404 /* 405 * prepare to display messages 406 */ 407 totty = (isatty(fileno(stdout)) != 0); 408 use_pager = use_pager && totty; 409 410 sprintf(fname, "%s/%s", getenv("HOME"), MSGSRC); 411 msgsrc = fopen(fname, "r"); 412 if (msgsrc) { 413 newrc = NO; 414 fscanf(msgsrc, "%d\n", &nextmsg); 415 fclose(msgsrc); 416 if (nextmsg > lastmsg+1) { 417 printf("Warning: bounds have been reset (%d, %d)\n", 418 firstmsg, lastmsg); 419 truncate(fname, (off_t)0); 420 newrc = YES; 421 } 422 else if (!rcfirst) 423 rcfirst = nextmsg - rcback; 424 } 425 else 426 newrc = YES; 427 msgsrc = fopen(fname, "r+"); 428 if (msgsrc == NULL) 429 msgsrc = fopen(fname, "w"); 430 if (msgsrc == NULL) { 431 perror(fname); 432 exit(errno); 433 } 434 if (rcfirst) { 435 if (rcfirst > lastmsg+1) { 436 printf("Warning: the last message is number %d.\n", 437 lastmsg); 438 rcfirst = nextmsg; 439 } 440 if (rcfirst > firstmsg) 441 firstmsg = rcfirst; /* don't set below first msg */ 442 } 443 if (newrc) { 444 nextmsg = firstmsg; 445 fseek(msgsrc, 0L, 0); 446 fprintf(msgsrc, "%d\n", nextmsg); 447 fflush(msgsrc); 448 } 449 450 #ifdef V7 451 if (totty) { 452 struct winsize win; 453 if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1) 454 Lpp = win.ws_row; 455 if (Lpp <= 0) { 456 if (tgetent(inbuf, getenv("TERM")) <= 0 457 || (Lpp = tgetnum("li")) <= 0) { 458 Lpp = NLINES; 459 } 460 } 461 } 462 #endif 463 Lpp -= 6; /* for headers, etc. */ 464 465 already = NO; 466 prevmsg = firstmsg; 467 printing = YES; 468 if (ruptible) 469 signal(SIGINT, onintr); 470 471 /* 472 * Main program loop 473 */ 474 for (msg = firstmsg; msg <= lastmsg; msg++) { 475 476 sprintf(fname, "%s/%d", _PATH_MSGS, msg); 477 newmsg = fopen(fname, "r"); 478 if (newmsg == NULL) 479 continue; 480 481 gfrsub(newmsg); /* get From and Subject fields */ 482 if (locomode && !local) { 483 fclose(newmsg); 484 continue; 485 } 486 487 if (qopt) { /* This has to be located here */ 488 printf("There are new messages.\n"); 489 exit(0); 490 } 491 492 if (already && !hdrs) 493 putchar('\n'); 494 495 /* 496 * Print header 497 */ 498 if (totty) 499 signal(SIGTSTP, onsusp); 500 (void) setjmp(tstpbuf); 501 already = YES; 502 nlines = 2; 503 if (seenfrom) { 504 printf("Message %d:\nFrom %s %s", msg, from, date); 505 nlines++; 506 } 507 if (seensubj) { 508 printf("Subject: %s", subj); 509 nlines++; 510 } 511 else { 512 if (seenfrom) { 513 putchar('\n'); 514 nlines++; 515 } 516 while (nlines < 6 517 && fgets(inbuf, sizeof inbuf, newmsg) 518 && inbuf[0] != '\n') { 519 fputs(inbuf, stdout); 520 nlines++; 521 } 522 } 523 524 lct = linecnt(newmsg); 525 if (lct) 526 printf("(%d%slines) ", lct, seensubj? " " : " more "); 527 528 if (hdrs) { 529 printf("\n-----\n"); 530 fclose(newmsg); 531 continue; 532 } 533 534 /* 535 * Ask user for command 536 */ 537 if (totty) 538 ask(lct? MORE : (msg==lastmsg? NOMORE : NEXT)); 539 else 540 inbuf[0] = 'y'; 541 if (totty) 542 signal(SIGTSTP, SIG_DFL); 543 cmnd: 544 in = inbuf; 545 switch (*in) { 546 case 'x': 547 case 'X': 548 exit(0); 549 550 case 'q': 551 case 'Q': 552 quitit = YES; 553 printf("--Postponed--\n"); 554 exit(0); 555 /* intentional fall-thru */ 556 case 'n': 557 case 'N': 558 if (msg >= nextmsg) sep = "Flushed"; 559 prevmsg = msg; 560 break; 561 562 case 'p': 563 case 'P': 564 use_pager = (*in++ == 'p'); 565 /* intentional fallthru */ 566 case '\n': 567 case 'y': 568 default: 569 if (*in == '-') { 570 msg = prevmsg-1; 571 sep = "replay"; 572 break; 573 } 574 if (isdigit(*in)) { 575 msg = next(in); 576 sep = in; 577 break; 578 } 579 580 prmesg(nlines + lct + (seensubj? 1 : 0)); 581 prevmsg = msg; 582 583 } 584 585 printf("--%s--\n", sep); 586 sep = "-"; 587 if (msg >= nextmsg) { 588 nextmsg = msg + 1; 589 fseek(msgsrc, 0L, 0); 590 fprintf(msgsrc, "%d\n", nextmsg); 591 fflush(msgsrc); 592 } 593 if (newmsg) 594 fclose(newmsg); 595 if (quitit) 596 break; 597 } 598 599 /* 600 * Make sure .rc file gets updated 601 */ 602 if (--msg >= nextmsg) { 603 nextmsg = msg + 1; 604 fseek(msgsrc, 0L, 0); 605 fprintf(msgsrc, "%d\n", nextmsg); 606 fflush(msgsrc); 607 } 608 if (already && !quitit && lastcmd && totty) { 609 /* 610 * save or reply to last message? 611 */ 612 msg = prevmsg; 613 ask(NOMORE); 614 if (inbuf[0] == '-' || isdigit(inbuf[0])) 615 goto cmnd; 616 } 617 if (!(already || hush || qopt)) 618 printf("No new messages.\n"); 619 exit(0); 620 } 621 622 void 623 prmesg(length) 624 int length; 625 { 626 FILE *outf; 627 char *env_pager; 628 629 if (use_pager && length > Lpp) { 630 signal(SIGPIPE, SIG_IGN); 631 signal(SIGQUIT, SIG_IGN); 632 if ((env_pager = getenv("PAGER")) == NULL) { 633 sprintf(cmdbuf, _PATH_PAGER, Lpp); 634 } else { 635 strcpy(cmdbuf, env_pager); 636 } 637 outf = popen(cmdbuf, "w"); 638 if (!outf) 639 outf = stdout; 640 else 641 setbuf(outf, (char *)NULL); 642 } 643 else 644 outf = stdout; 645 646 if (seensubj) 647 putc('\n', outf); 648 649 while (fgets(inbuf, sizeof inbuf, newmsg)) { 650 fputs(inbuf, outf); 651 if (ferror(outf)) { 652 clearerr(outf); 653 break; 654 } 655 } 656 657 if (outf != stdout) { 658 pclose(outf); 659 signal(SIGPIPE, SIG_DFL); 660 signal(SIGQUIT, SIG_DFL); 661 } 662 else { 663 fflush(stdout); 664 } 665 666 /* trick to force wait on output */ 667 tcdrain(fileno(stdout)); 668 } 669 670 void 671 onintr(dummy) 672 int dummy; 673 { 674 signal(SIGINT, onintr); 675 if (mailing) 676 unlink(fname); 677 if (sending) { 678 unlink(fname); 679 puts("--Killed--"); 680 exit(1); 681 } 682 if (printing) { 683 putchar('\n'); 684 if (hdrs) 685 exit(0); 686 sep = "Interrupt"; 687 if (newmsg) 688 fseek(newmsg, 0L, 2); 689 intrpflg = YES; 690 } 691 } 692 693 /* 694 * We have just gotten a susp. Suspend and prepare to resume. 695 */ 696 void 697 onsusp(dummy) 698 int dummy; 699 { 700 701 signal(SIGTSTP, SIG_DFL); 702 sigsetmask(0); 703 kill(0, SIGTSTP); 704 signal(SIGTSTP, onsusp); 705 if (!mailing) 706 longjmp(tstpbuf, 0); 707 } 708 709 int 710 linecnt(f) 711 FILE *f; 712 { 713 off_t oldpos = ftell(f); 714 int l = 0; 715 char lbuf[BUFSIZ]; 716 717 while (fgets(lbuf, sizeof lbuf, f)) 718 l++; 719 clearerr(f); 720 fseek(f, oldpos, 0); 721 return (l); 722 } 723 724 int 725 next(buf) 726 char *buf; 727 { 728 int i; 729 sscanf(buf, "%d", &i); 730 sprintf(buf, "Goto %d", i); 731 return(--i); 732 } 733 734 void 735 ask(prompt) 736 char *prompt; 737 { 738 char inch; 739 int n, cmsg; 740 off_t oldpos; 741 FILE *cpfrom, *cpto; 742 743 printf("%s ", prompt); 744 fflush(stdout); 745 intrpflg = NO; 746 (void) fgets(inbuf, sizeof inbuf, stdin); 747 if ((n = strlen(inbuf)) > 0 && inbuf[n - 1] == '\n') 748 inbuf[n - 1] = '\0'; 749 if (intrpflg) 750 inbuf[0] = 'x'; 751 752 /* 753 * Handle 'mail' and 'save' here. 754 */ 755 if (((inch = inbuf[0]) == 's' || inch == 'm') && !restricted) { 756 if (inbuf[1] == '-') 757 cmsg = prevmsg; 758 else if (isdigit(inbuf[1])) 759 cmsg = atoi(&inbuf[1]); 760 else 761 cmsg = msg; 762 sprintf(fname, "%s/%d", _PATH_MSGS, cmsg); 763 764 oldpos = ftell(newmsg); 765 766 cpfrom = fopen(fname, "r"); 767 if (!cpfrom) { 768 printf("Message %d not found\n", cmsg); 769 ask (prompt); 770 return; 771 } 772 773 if (inch == 's') { 774 in = nxtfld(inbuf); 775 if (*in) { 776 for (n=0; in[n] > ' '; n++) { /* sizeof fname? */ 777 fname[n] = in[n]; 778 } 779 fname[n] = '\0'; 780 } 781 else 782 strcpy(fname, "Messages"); 783 } 784 else { 785 strcpy(fname, _PATH_TMP); 786 mktemp(fname); 787 sprintf(cmdbuf, _PATH_MAIL, fname); 788 mailing = YES; 789 } 790 cpto = fopen(fname, "a"); 791 if (!cpto) { 792 perror(fname); 793 mailing = NO; 794 fseek(newmsg, oldpos, 0); 795 ask(prompt); 796 return; 797 } 798 799 while ((n = fread(inbuf, 1, sizeof inbuf, cpfrom)) != 0) 800 fwrite(inbuf, 1, n, cpto); 801 802 fclose(cpfrom); 803 fclose(cpto); 804 fseek(newmsg, oldpos, 0); /* reposition current message */ 805 if (inch == 's') 806 printf("Message %d saved in \"%s\"\n", cmsg, fname); 807 else { 808 system(cmdbuf); 809 unlink(fname); 810 mailing = NO; 811 } 812 ask(prompt); 813 } 814 } 815 816 void 817 gfrsub(infile) 818 FILE *infile; 819 { 820 off_t frompos; 821 822 seensubj = seenfrom = NO; 823 local = YES; 824 subj[0] = from[0] = date[0] = 0; 825 826 /* 827 * Is this a normal message? 828 */ 829 if (fgets(inbuf, sizeof inbuf, infile)) { 830 if (strncmp(inbuf, "From", 4)==0) { 831 /* 832 * expected form starts with From 833 */ 834 seenfrom = YES; 835 frompos = ftell(infile); 836 ptr = from; 837 in = nxtfld(inbuf); 838 if (*in) while (*in && *in > ' ') { 839 if (*in == ':' || *in == '@' || *in == '!') 840 local = NO; 841 *ptr++ = *in++; 842 /* what about sizeof from ? */ 843 } 844 *ptr = '\0'; 845 if (*(in = nxtfld(in))) 846 strncpy(date, in, sizeof date); 847 else { 848 date[0] = '\n'; 849 date[1] = '\0'; 850 } 851 } 852 else { 853 /* 854 * not the expected form 855 */ 856 fseek(infile, 0L, 0); 857 return; 858 } 859 } 860 else 861 /* 862 * empty file ? 863 */ 864 return; 865 866 /* 867 * look for Subject line until EOF or a blank line 868 */ 869 while (fgets(inbuf, sizeof inbuf, infile) 870 && !(blankline = (inbuf[0] == '\n'))) { 871 /* 872 * extract Subject line 873 */ 874 if (!seensubj && strncmp(inbuf, "Subj", 4)==0) { 875 seensubj = YES; 876 frompos = ftell(infile); 877 strncpy(subj, nxtfld(inbuf), sizeof subj); 878 } 879 } 880 if (!blankline) 881 /* 882 * ran into EOF 883 */ 884 fseek(infile, frompos, 0); 885 886 if (!seensubj) 887 /* 888 * for possible use with Mail 889 */ 890 strncpy(subj, "(No Subject)\n", sizeof subj); 891 } 892 893 char * 894 nxtfld(s) 895 char *s; 896 { 897 if (*s) while (*s && *s > ' ') s++; /* skip over this field */ 898 if (*s) while (*s && *s <= ' ') s++; /* find start of next field */ 899 return (s); 900 } 901
Indexes created Thu Sep 25 16:09:42 GMT 2025