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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#) Copyright (c) 1980, 1993 The Regents of the University of California. All rights reserved. 30 * @(#)msgs.c 8.2 (Berkeley) 4/28/95 31 * $FreeBSD: src/usr.bin/msgs/msgs.c,v 1.15.2.2 2003/02/11 21:31:56 mike Exp $ 32 * $DragonFly: src/usr.bin/msgs/msgs.c,v 1.7 2007/11/25 18:10:07 swildner Exp $ 33 */ 34 35 /* 36 * msgs - a user bulletin board program 37 * 38 * usage: 39 * msgs [fhlopq] [[-]number] to read messages 40 * msgs -s to place messages 41 * msgs -c [-days] to clean up the bulletin board 42 * 43 * prompt commands are: 44 * y print message 45 * n flush message, go to next message 46 * q flush message, quit 47 * p print message, turn on 'pipe thru more' mode 48 * P print message, turn off 'pipe thru more' mode 49 * - reprint last message 50 * s[-][<num>] [<filename>] save message 51 * m[-][<num>] mail with message in temp mbox 52 * x exit without flushing this message 53 * <num> print message number <num> 54 */ 55 56 #define V7 /* will look for TERM in the environment */ 57 #define OBJECT /* will object to messages without Subjects */ 58 /* #define REJECT */ /* will reject messages without Subjects 59 (OBJECT must be defined also) */ 60 /* #define UNBUFFERED *//* use unbuffered output */ 61 62 #include <sys/param.h> 63 #include <sys/stat.h> 64 #include <ctype.h> 65 #include <dirent.h> 66 #include <err.h> 67 #include <errno.h> 68 #include <fcntl.h> 69 #include <locale.h> 70 #include <pwd.h> 71 #include <setjmp.h> 72 #include <termcap.h> 73 #include <termios.h> 74 #include <signal.h> 75 #include <stdio.h> 76 #include <stdlib.h> 77 #include <string.h> 78 #include <time.h> 79 #include <unistd.h> 80 #include "pathnames.h" 81 82 #define CMODE 0644 /* bounds file creation mode */ 83 #define NO 0 84 #define YES 1 85 #define SUPERUSER 0 /* superuser uid */ 86 #define DAEMON 1 /* daemon uid */ 87 #define NLINES 24 /* default number of lines/crt screen */ 88 #define NDAYS 21 /* default keep time for messages */ 89 #define DAYS *24*60*60 /* seconds/day */ 90 #define MSGSRC ".msgsrc" /* user's rc file */ 91 #define BOUNDS "bounds" /* message bounds file */ 92 #define NEXT "Next message? [yq]" 93 #define MORE "More? [ynq]" 94 #define NOMORE "(No more) [q] ?" 95 96 typedef char bool; 97 98 FILE *msgsrc; 99 FILE *newmsg; 100 const char *sep = "-"; 101 char inbuf[BUFSIZ]; 102 char fname[MAXPATHLEN]; 103 char cmdbuf[MAXPATHLEN + MAXPATHLEN]; 104 char subj[128]; 105 char from[128]; 106 char date[128]; 107 char *ptr; 108 char *in; 109 bool local; 110 bool ruptible; 111 bool totty; 112 bool seenfrom; 113 bool seensubj; 114 bool blankline; 115 bool printing = NO; 116 bool mailing = NO; 117 bool quitit = NO; 118 bool sending = NO; 119 bool intrpflg = NO; 120 int uid; 121 int msg; 122 int prevmsg; 123 int lct; 124 int nlines; 125 int Lpp = 0; 126 time_t t; 127 time_t keep; 128 129 /* option initialization */ 130 bool hdrs = NO; 131 bool qopt = NO; 132 bool hush = NO; 133 bool send_msg = NO; 134 bool locomode = NO; 135 bool use_pager = NO; 136 bool clean = NO; 137 bool lastcmd = NO; 138 jmp_buf tstpbuf; 139 140 141 void ask(const char *); 142 void gfrsub(FILE *); 143 int linecnt(FILE *); 144 int next(char *); 145 char *nxtfld(unsigned char *); 146 void onsusp(int); 147 void onintr(int); 148 void prmesg(int); 149 static void usage(void); 150 151 int 152 main(int argc, char **argv) 153 { 154 bool newrc, already; 155 int rcfirst = 0; /* first message to print (from .rc) */ 156 int rcback = 0; /* amount to back off of rcfirst */ 157 int firstmsg = 0, nextmsg = 0, lastmsg = 0; 158 int blast = 0; 159 struct stat buf; /* stat to check access of bounds */ 160 FILE *bounds; 161 162 #ifdef UNBUFFERED 163 setbuf(stdout, NULL); 164 #endif 165 setlocale(LC_ALL, ""); 166 167 time(&t); 168 setuid(uid = getuid()); 169 ruptible = (signal(SIGINT, SIG_IGN) == SIG_DFL); 170 if (ruptible) 171 signal(SIGINT, SIG_DFL); 172 173 argc--, argv++; 174 while (argc > 0) { 175 if (isdigit(argv[0][0])) { /* starting message # */ 176 rcfirst = atoi(argv[0]); 177 } 178 else if (isdigit(argv[0][1])) { /* backward offset */ 179 rcback = atoi( &( argv[0][1] ) ); 180 } 181 else { 182 ptr = *argv; 183 while (*ptr) switch (*ptr++) { 184 185 case '-': 186 break; 187 188 case 'c': 189 if (uid != SUPERUSER && uid != DAEMON) { 190 fprintf(stderr, "Sorry\n"); 191 exit(1); 192 } 193 clean = YES; 194 break; 195 196 case 'f': /* silently */ 197 hush = YES; 198 break; 199 200 case 'h': /* headers only */ 201 hdrs = YES; 202 break; 203 204 case 'l': /* local msgs only */ 205 locomode = YES; 206 break; 207 208 case 'o': /* option to save last message */ 209 lastcmd = YES; 210 break; 211 212 case 'p': /* pipe thru 'more' during long msgs */ 213 use_pager = YES; 214 break; 215 216 case 'q': /* query only */ 217 qopt = YES; 218 break; 219 220 case 's': /* sending TO msgs */ 221 send_msg = YES; 222 break; 223 224 default: 225 usage(); 226 } 227 } 228 argc--, argv++; 229 } 230 231 /* 232 * determine current message bounds 233 */ 234 snprintf(fname, sizeof(fname), "%s/%s", _PATH_MSGS, BOUNDS); 235 236 /* 237 * Test access rights to the bounds file 238 * This can be a little tricky. if(send_msg), then 239 * we will create it. We assume that if(send_msg), 240 * then you have write permission there. 241 * Else, it better be there, or we bail. 242 */ 243 if (send_msg != YES) { 244 if (stat(fname, &buf) < 0) { 245 if (hush != YES) { 246 err(errno, "%s", fname); 247 } else { 248 exit(1); 249 } 250 } 251 } 252 bounds = fopen(fname, "r"); 253 254 if (bounds != NULL) { 255 fscanf(bounds, "%d %d\n", &firstmsg, &lastmsg); 256 fclose(bounds); 257 blast = lastmsg; /* save upper bound */ 258 } 259 260 if (clean) 261 keep = t - (rcback? rcback : NDAYS) DAYS; 262 263 if (clean || bounds == NULL) { /* relocate message bounds */ 264 struct dirent *dp; 265 struct stat stbuf; 266 bool seenany = NO; 267 DIR *dirp; 268 269 dirp = opendir(_PATH_MSGS); 270 if (dirp == NULL) 271 err(errno, "%s", _PATH_MSGS); 272 273 firstmsg = 32767; 274 lastmsg = 0; 275 276 for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)){ 277 char *cp = dp->d_name; 278 int i = 0; 279 280 if (dp->d_ino == 0) 281 continue; 282 283 if (clean) 284 snprintf(inbuf, sizeof(inbuf), "%s/%s", _PATH_MSGS, cp); 285 286 while (isdigit(*cp)) 287 i = i * 10 + *cp++ - '0'; 288 if (*cp) 289 continue; /* not a message! */ 290 291 if (clean) { 292 if (stat(inbuf, &stbuf) != 0) 293 continue; 294 if (stbuf.st_mtime < keep 295 && stbuf.st_mode&S_IWRITE) { 296 unlink(inbuf); 297 continue; 298 } 299 } 300 301 if (i > lastmsg) 302 lastmsg = i; 303 if (i < firstmsg) 304 firstmsg = i; 305 seenany = YES; 306 } 307 closedir(dirp); 308 309 if (!seenany) { 310 if (blast != 0) /* never lower the upper bound! */ 311 lastmsg = blast; 312 firstmsg = lastmsg + 1; 313 } 314 else if (blast > lastmsg) 315 lastmsg = blast; 316 317 if (!send_msg) { 318 bounds = fopen(fname, "w"); 319 if (bounds == NULL) 320 err(errno, "%s", fname); 321 chmod(fname, CMODE); 322 fprintf(bounds, "%d %d\n", firstmsg, lastmsg); 323 fclose(bounds); 324 } 325 } 326 327 if (send_msg) { 328 /* 329 * Send mode - place msgs in _PATH_MSGS 330 */ 331 bounds = fopen(fname, "w"); 332 if (bounds == NULL) 333 err(errno, "%s", fname); 334 335 nextmsg = lastmsg + 1; 336 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, nextmsg); 337 newmsg = fopen(fname, "w"); 338 if (newmsg == NULL) 339 err(errno, "%s", fname); 340 chmod(fname, CMODE); 341 342 fprintf(bounds, "%d %d\n", firstmsg, nextmsg); 343 fclose(bounds); 344 345 sending = YES; 346 if (ruptible) 347 signal(SIGINT, onintr); 348 349 if (isatty(fileno(stdin))) { 350 ptr = getpwuid(uid)->pw_name; 351 printf("Message %d:\nFrom %s %sSubject: ", 352 nextmsg, ptr, ctime(&t)); 353 fflush(stdout); 354 fgets(inbuf, sizeof inbuf, stdin); 355 putchar('\n'); 356 fflush(stdout); 357 fprintf(newmsg, "From %s %sSubject: %s\n", 358 ptr, ctime(&t), inbuf); 359 blankline = seensubj = YES; 360 } 361 else 362 blankline = seensubj = NO; 363 for (;;) { 364 fgets(inbuf, sizeof inbuf, stdin); 365 if (feof(stdin) || ferror(stdin)) 366 break; 367 blankline = (blankline || (inbuf[0] == '\n')); 368 seensubj = (seensubj || (!blankline && (strncmp(inbuf, "Subj", 4) == 0))); 369 fputs(inbuf, newmsg); 370 } 371 #ifdef OBJECT 372 if (!seensubj) { 373 printf("NOTICE: Messages should have a Subject field!\n"); 374 #ifdef REJECT 375 unlink(fname); 376 #endif 377 exit(1); 378 } 379 #endif 380 exit(ferror(stdin)); 381 } 382 if (clean) 383 exit(0); 384 385 /* 386 * prepare to display messages 387 */ 388 totty = (isatty(fileno(stdout)) != 0); 389 use_pager = use_pager && totty; 390 391 snprintf(fname, sizeof(fname), "%s/%s", getenv("HOME"), MSGSRC); 392 msgsrc = fopen(fname, "r"); 393 if (msgsrc) { 394 newrc = NO; 395 fscanf(msgsrc, "%d\n", &nextmsg); 396 fclose(msgsrc); 397 if (nextmsg > lastmsg+1) { 398 printf("Warning: bounds have been reset (%d, %d)\n", 399 firstmsg, lastmsg); 400 truncate(fname, (off_t)0); 401 newrc = YES; 402 } 403 else if (!rcfirst) 404 rcfirst = nextmsg - rcback; 405 } 406 else 407 newrc = YES; 408 msgsrc = fopen(fname, "r+"); 409 if (msgsrc == NULL) 410 msgsrc = fopen(fname, "w"); 411 if (msgsrc == NULL) 412 err(errno, "%s", fname); 413 if (rcfirst) { 414 if (rcfirst > lastmsg+1) { 415 printf("Warning: the last message is number %d.\n", 416 lastmsg); 417 rcfirst = nextmsg; 418 } 419 if (rcfirst > firstmsg) 420 firstmsg = rcfirst; /* don't set below first msg */ 421 } 422 if (newrc) { 423 nextmsg = firstmsg; 424 fseek(msgsrc, 0L, 0); 425 fprintf(msgsrc, "%d\n", nextmsg); 426 fflush(msgsrc); 427 } 428 429 #ifdef V7 430 if (totty) { 431 struct winsize win; 432 if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1) 433 Lpp = win.ws_row; 434 if (Lpp <= 0) { 435 if (tgetent(inbuf, getenv("TERM")) <= 0 436 || (Lpp = tgetnum("li")) <= 0) { 437 Lpp = NLINES; 438 } 439 } 440 } 441 #endif 442 Lpp -= 6; /* for headers, etc. */ 443 444 already = NO; 445 prevmsg = firstmsg; 446 printing = YES; 447 if (ruptible) 448 signal(SIGINT, onintr); 449 450 /* 451 * Main program loop 452 */ 453 for (msg = firstmsg; msg <= lastmsg; msg++) { 454 455 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, msg); 456 newmsg = fopen(fname, "r"); 457 if (newmsg == NULL) 458 continue; 459 460 gfrsub(newmsg); /* get From and Subject fields */ 461 if (locomode && !local) { 462 fclose(newmsg); 463 continue; 464 } 465 466 if (qopt) { /* This has to be located here */ 467 printf("There are new messages.\n"); 468 exit(0); 469 } 470 471 if (already && !hdrs) 472 putchar('\n'); 473 474 /* 475 * Print header 476 */ 477 if (totty) 478 signal(SIGTSTP, onsusp); 479 (void) setjmp(tstpbuf); 480 already = YES; 481 nlines = 2; 482 if (seenfrom) { 483 printf("Message %d:\nFrom %s %s", msg, from, date); 484 nlines++; 485 } 486 if (seensubj) { 487 printf("Subject: %s", subj); 488 nlines++; 489 } 490 else { 491 if (seenfrom) { 492 putchar('\n'); 493 nlines++; 494 } 495 while (nlines < 6 496 && fgets(inbuf, sizeof inbuf, newmsg) 497 && inbuf[0] != '\n') { 498 fputs(inbuf, stdout); 499 nlines++; 500 } 501 } 502 503 lct = linecnt(newmsg); 504 if (lct) 505 printf("(%d%sline%s) ", lct, seensubj? " " : " more ", 506 (lct == 1) ? "" : "s"); 507 508 if (hdrs) { 509 printf("\n-----\n"); 510 fclose(newmsg); 511 continue; 512 } 513 514 /* 515 * Ask user for command 516 */ 517 if (totty) 518 ask(lct? MORE : (msg==lastmsg? NOMORE : NEXT)); 519 else 520 inbuf[0] = 'y'; 521 if (totty) 522 signal(SIGTSTP, SIG_DFL); 523 cmnd: 524 in = inbuf; 525 switch (*in) { 526 case 'x': 527 case 'X': 528 exit(0); 529 530 case 'q': 531 case 'Q': 532 quitit = YES; 533 printf("--Postponed--\n"); 534 exit(0); 535 /* intentional fall-thru */ 536 case 'n': 537 case 'N': 538 if (msg >= nextmsg) sep = "Flushed"; 539 prevmsg = msg; 540 break; 541 542 case 'p': 543 case 'P': 544 use_pager = (*in++ == 'p'); 545 /* intentional fallthru */ 546 case '\n': 547 case 'y': 548 default: 549 if (*in == '-') { 550 msg = prevmsg-1; 551 sep = "replay"; 552 break; 553 } 554 if (isdigit(*in)) { 555 msg = next(in); 556 sep = in; 557 break; 558 } 559 560 prmesg(nlines + lct + (seensubj? 1 : 0)); 561 prevmsg = msg; 562 563 } 564 565 printf("--%s--\n", sep); 566 sep = "-"; 567 if (msg >= nextmsg) { 568 nextmsg = msg + 1; 569 fseek(msgsrc, 0L, 0); 570 fprintf(msgsrc, "%d\n", nextmsg); 571 fflush(msgsrc); 572 } 573 if (newmsg) 574 fclose(newmsg); 575 if (quitit) 576 break; 577 } 578 579 /* 580 * Make sure .rc file gets updated 581 */ 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 (already && !quitit && lastcmd && totty) { 589 /* 590 * save or reply to last message? 591 */ 592 msg = prevmsg; 593 ask(NOMORE); 594 if (inbuf[0] == '-' || isdigit(inbuf[0])) 595 goto cmnd; 596 } 597 if (!(already || hush || qopt)) 598 printf("No new messages.\n"); 599 exit(0); 600 } 601 602 static void 603 usage(void) 604 { 605 fprintf(stderr, "usage: msgs [fhlopq] [[-]number]\n"); 606 exit(1); 607 } 608 609 void 610 prmesg(int length) 611 { 612 FILE *outf; 613 char *env_pager; 614 615 if (use_pager && length > Lpp) { 616 signal(SIGPIPE, SIG_IGN); 617 signal(SIGQUIT, SIG_IGN); 618 if ((env_pager = getenv("PAGER")) == NULL) { 619 snprintf(cmdbuf, sizeof(cmdbuf), _PATH_PAGER, Lpp); 620 } else { 621 snprintf(cmdbuf, sizeof(cmdbuf), "%s", env_pager); 622 } 623 outf = popen(cmdbuf, "w"); 624 if (!outf) 625 outf = stdout; 626 else 627 setbuf(outf, NULL); 628 } 629 else 630 outf = stdout; 631 632 if (seensubj) 633 putc('\n', outf); 634 635 while (fgets(inbuf, sizeof inbuf, newmsg)) { 636 fputs(inbuf, outf); 637 if (ferror(outf)) { 638 clearerr(outf); 639 break; 640 } 641 } 642 643 if (outf != stdout) { 644 pclose(outf); 645 signal(SIGPIPE, SIG_DFL); 646 signal(SIGQUIT, SIG_DFL); 647 } 648 else { 649 fflush(stdout); 650 } 651 652 /* force wait on output */ 653 tcdrain(fileno(stdout)); 654 } 655 656 void 657 onintr(int unused __unused) 658 { 659 signal(SIGINT, onintr); 660 if (mailing) 661 unlink(fname); 662 if (sending) { 663 unlink(fname); 664 puts("--Killed--"); 665 exit(1); 666 } 667 if (printing) { 668 putchar('\n'); 669 if (hdrs) 670 exit(0); 671 sep = "Interrupt"; 672 if (newmsg) 673 fseek(newmsg, 0L, 2); 674 intrpflg = YES; 675 } 676 } 677 678 /* 679 * We have just gotten a susp. Suspend and prepare to resume. 680 */ 681 void 682 onsusp(int unused __unused) 683 { 684 signal(SIGTSTP, SIG_DFL); 685 sigsetmask(0); 686 kill(0, SIGTSTP); 687 signal(SIGTSTP, onsusp); 688 if (!mailing) 689 longjmp(tstpbuf, 0); 690 } 691 692 int 693 linecnt(FILE *f) 694 { 695 off_t oldpos = ftell(f); 696 int l = 0; 697 char lbuf[BUFSIZ]; 698 699 while (fgets(lbuf, sizeof lbuf, f)) 700 l++; 701 clearerr(f); 702 fseek(f, oldpos, 0); 703 return (l); 704 } 705 706 int 707 next(char *buf) 708 { 709 int i; 710 sscanf(buf, "%d", &i); 711 sprintf(buf, "Goto %d", i); 712 return(--i); 713 } 714 715 void 716 ask(const char *prompt) 717 { 718 char inch; 719 int n, cmsg, fd; 720 off_t oldpos; 721 FILE *cpfrom, *cpto; 722 723 printf("%s ", prompt); 724 fflush(stdout); 725 intrpflg = NO; 726 (void) fgets(inbuf, sizeof inbuf, stdin); 727 if ((n = strlen(inbuf)) > 0 && inbuf[n - 1] == '\n') 728 inbuf[n - 1] = '\0'; 729 if (intrpflg) 730 inbuf[0] = 'x'; 731 732 /* 733 * Handle 'mail' and 'save' here. 734 */ 735 if ((inch = inbuf[0]) == 's' || inch == 'm') { 736 if (inbuf[1] == '-') 737 cmsg = prevmsg; 738 else if (isdigit(inbuf[1])) 739 cmsg = atoi(&inbuf[1]); 740 else 741 cmsg = msg; 742 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, cmsg); 743 744 oldpos = ftell(newmsg); 745 746 cpfrom = fopen(fname, "r"); 747 if (!cpfrom) { 748 printf("Message %d not found\n", cmsg); 749 ask (prompt); 750 return; 751 } 752 753 if (inch == 's') { 754 in = nxtfld(inbuf); 755 if (*in) { 756 for (n=0; in[n] > ' '; n++) { /* sizeof fname? */ 757 fname[n] = in[n]; 758 } 759 fname[n] = '\0'; 760 } 761 else 762 strcpy(fname, "Messages"); 763 fd = open(fname, O_RDWR|O_EXCL|O_CREAT|O_APPEND); 764 } 765 else { 766 strcpy(fname, _PATH_TMP); 767 fd = mkstemp(fname); 768 if (fd != -1) { 769 snprintf(cmdbuf, sizeof(cmdbuf), _PATH_MAIL, 770 fname); 771 mailing = YES; 772 } 773 } 774 if (fd == -1 || (cpto = fdopen(fd, "a")) == NULL) { 775 if (fd != -1) 776 close(fd); 777 warn("%s", fname); 778 mailing = NO; 779 fseek(newmsg, oldpos, 0); 780 ask(prompt); 781 return; 782 } 783 784 while ((n = fread(inbuf, 1, sizeof inbuf, cpfrom))) 785 fwrite(inbuf, 1, n, cpto); 786 787 fclose(cpfrom); 788 fclose(cpto); 789 fseek(newmsg, oldpos, 0); /* reposition current message */ 790 if (inch == 's') 791 printf("Message %d saved in \"%s\"\n", cmsg, fname); 792 else { 793 system(cmdbuf); 794 unlink(fname); 795 mailing = NO; 796 } 797 ask(prompt); 798 } 799 } 800 801 void 802 gfrsub(FILE *infile) 803 { 804 off_t frompos; 805 int count; 806 807 seensubj = seenfrom = NO; 808 local = YES; 809 subj[0] = from[0] = date[0] = '\0'; 810 811 /* 812 * Is this a normal message? 813 */ 814 if (fgets(inbuf, sizeof inbuf, infile)) { 815 if (strncmp(inbuf, "From", 4)==0) { 816 /* 817 * expected form starts with From 818 */ 819 seenfrom = YES; 820 frompos = ftell(infile); 821 ptr = from; 822 in = nxtfld(inbuf); 823 if (*in) { 824 count = sizeof(from) - 1; 825 while (*in && *in > ' ' && count-- > 0) { 826 if (*in == ':' || *in == '@' || 827 *in == '!') 828 local = NO; 829 *ptr++ = *in++; 830 } 831 } 832 *ptr = '\0'; 833 if (*(in = nxtfld(in))) 834 strncpy(date, in, sizeof date); 835 else { 836 date[0] = '\n'; 837 date[1] = '\0'; 838 } 839 } 840 else { 841 /* 842 * not the expected form 843 */ 844 fseek(infile, 0L, 0); 845 return; 846 } 847 } 848 else 849 /* 850 * empty file ? 851 */ 852 return; 853 854 /* 855 * look for Subject line until EOF or a blank line 856 */ 857 while (fgets(inbuf, sizeof inbuf, infile) 858 && !(blankline = (inbuf[0] == '\n'))) { 859 /* 860 * extract Subject line 861 */ 862 if (!seensubj && strncmp(inbuf, "Subj", 4)==0) { 863 seensubj = YES; 864 frompos = ftell(infile); 865 strncpy(subj, nxtfld(inbuf), sizeof subj); 866 } 867 } 868 if (!blankline) 869 /* 870 * ran into EOF 871 */ 872 fseek(infile, frompos, 0); 873 874 if (!seensubj) 875 /* 876 * for possible use with Mail 877 */ 878 strncpy(subj, "(No Subject)\n", sizeof subj); 879 } 880 881 char * 882 nxtfld(unsigned char *s) 883 { 884 if (*s) while (*s && !isspace(*s)) s++; /* skip over this field */ 885 if (*s) while (*s && isspace(*s)) s++; /* find start of next field */ 886 return (s); 887 } 888