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 * 4. 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 30 #ifndef lint 31 static const char copyright[] = 32 "@(#) Copyright (c) 1980, 1993\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34 #endif /* not lint */ 35 36 #if 0 37 #ifndef lint 38 static char sccsid[] = "@(#)msgs.c 8.2 (Berkeley) 4/28/95"; 39 #endif /* not lint */ 40 #endif 41 42 #include <sys/cdefs.h> 43 __FBSDID("$FreeBSD$"); 44 45 /* 46 * msgs - a user bulletin board program 47 * 48 * usage: 49 * msgs [fhlopq] [[-]number] to read messages 50 * msgs -s to place messages 51 * msgs -c [-days] to clean up the bulletin board 52 * 53 * prompt commands are: 54 * y print message 55 * n flush message, go to next message 56 * q flush message, quit 57 * p print message, turn on 'pipe thru more' mode 58 * P print message, turn off 'pipe thru more' mode 59 * - reprint last message 60 * s[-][<num>] [<filename>] save message 61 * m[-][<num>] mail with message in temp mbox 62 * x exit without flushing this message 63 * <num> print message number <num> 64 */ 65 66 #define V7 /* will look for TERM in the environment */ 67 #define OBJECT /* will object to messages without Subjects */ 68 /* #define REJECT */ /* will reject messages without Subjects 69 (OBJECT must be defined also) */ 70 /* #define UNBUFFERED *//* use unbuffered output */ 71 72 #include <sys/param.h> 73 #include <sys/stat.h> 74 #include <ctype.h> 75 #include <dirent.h> 76 #include <err.h> 77 #include <errno.h> 78 #include <fcntl.h> 79 #include <locale.h> 80 #include <pwd.h> 81 #include <setjmp.h> 82 #include <termcap.h> 83 #include <termios.h> 84 #include <signal.h> 85 #include <stdio.h> 86 #include <stdlib.h> 87 #include <string.h> 88 #include <time.h> 89 #include <unistd.h> 90 #include "pathnames.h" 91 92 #define CMODE 0644 /* bounds file creation mode */ 93 #define NO 0 94 #define YES 1 95 #define SUPERUSER 0 /* superuser uid */ 96 #define DAEMON 1 /* daemon uid */ 97 #define NLINES 24 /* default number of lines/crt screen */ 98 #define NDAYS 21 /* default keep time for messages */ 99 #define DAYS *24*60*60 /* seconds/day */ 100 #define MSGSRC ".msgsrc" /* user's rc file */ 101 #define BOUNDS "bounds" /* message bounds file */ 102 #define NEXT "Next message? [yq]" 103 #define MORE "More? [ynq]" 104 #define NOMORE "(No more) [q] ?" 105 106 typedef char bool; 107 108 FILE *msgsrc; 109 FILE *newmsg; 110 const char *sep = "-"; 111 char inbuf[BUFSIZ]; 112 char fname[MAXPATHLEN]; 113 char cmdbuf[MAXPATHLEN + MAXPATHLEN]; 114 char subj[128]; 115 char from[128]; 116 char date[128]; 117 char *ptr; 118 char *in; 119 bool local; 120 bool ruptible; 121 bool totty; 122 bool seenfrom; 123 bool seensubj; 124 bool blankline; 125 bool printing = NO; 126 bool mailing = NO; 127 bool quitit = NO; 128 bool sending = NO; 129 bool intrpflg = NO; 130 uid_t uid; 131 int msg; 132 int prevmsg; 133 int lct; 134 int nlines; 135 int Lpp = 0; 136 time_t t; 137 time_t keep; 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 static void ask(const char *); 151 static void gfrsub(FILE *); 152 static int linecnt(FILE *); 153 static int next(char *); 154 static char *nxtfld(char *); 155 static void onsusp(int); 156 static void onintr(int); 157 static void prmesg(int); 158 static void usage(void); 159 160 int 161 main(int argc, char *argv[]) 162 { 163 bool newrc, already; 164 int rcfirst = 0; /* first message to print (from .rc) */ 165 int rcback = 0; /* amount to back off of rcfirst */ 166 int firstmsg = 0, nextmsg = 0, lastmsg = 0; 167 int blast = 0; 168 struct stat buf; /* stat to check access of bounds */ 169 FILE *bounds; 170 char *cp; 171 172 #ifdef UNBUFFERED 173 setbuf(stdout, NULL); 174 #endif 175 setlocale(LC_ALL, ""); 176 177 time(&t); 178 setuid(uid = getuid()); 179 ruptible = (signal(SIGINT, SIG_IGN) == SIG_DFL); 180 if (ruptible) 181 signal(SIGINT, SIG_DFL); 182 183 argc--, argv++; 184 while (argc > 0) { 185 if (isdigit(argv[0][0])) { /* starting message # */ 186 rcfirst = atoi(argv[0]); 187 } 188 else if (isdigit(argv[0][1])) { /* backward offset */ 189 rcback = atoi( &( argv[0][1] ) ); 190 } 191 else { 192 ptr = *argv; 193 while (*ptr) switch (*ptr++) { 194 195 case '-': 196 break; 197 198 case 'c': 199 if (uid != SUPERUSER && uid != DAEMON) 200 errx(1, 201 "only the super-user can use the c flag"); 202 clean = YES; 203 break; 204 205 case 'f': /* silently */ 206 hush = YES; 207 break; 208 209 case 'h': /* headers only */ 210 hdrs = YES; 211 break; 212 213 case 'l': /* local msgs only */ 214 locomode = YES; 215 break; 216 217 case 'o': /* option to save last message */ 218 lastcmd = YES; 219 break; 220 221 case 'p': /* pipe thru 'more' during long msgs */ 222 use_pager = YES; 223 break; 224 225 case 'q': /* query only */ 226 qopt = YES; 227 break; 228 229 case 's': /* sending TO msgs */ 230 send_msg = YES; 231 break; 232 233 default: 234 usage(); 235 } 236 } 237 argc--, argv++; 238 } 239 240 /* 241 * determine current message bounds 242 */ 243 snprintf(fname, sizeof(fname), "%s/%s", _PATH_MSGS, BOUNDS); 244 245 /* 246 * Test access rights to the bounds file 247 * This can be a little tricky. if(send_msg), then 248 * we will create it. We assume that if(send_msg), 249 * then you have write permission there. 250 * Else, it better be there, or we bail. 251 */ 252 if (send_msg != YES) { 253 if (stat(fname, &buf) < 0) { 254 if (hush != YES) { 255 err(errno, "%s", fname); 256 } else { 257 exit(1); 258 } 259 } 260 } 261 bounds = fopen(fname, "r"); 262 263 if (bounds != NULL) { 264 fscanf(bounds, "%d %d\n", &firstmsg, &lastmsg); 265 fclose(bounds); 266 blast = lastmsg; /* save upper bound */ 267 } 268 269 if (clean) 270 keep = t - (rcback? rcback : NDAYS) DAYS; 271 272 if (clean || bounds == NULL) { /* relocate message bounds */ 273 struct dirent *dp; 274 struct stat stbuf; 275 bool seenany = NO; 276 DIR *dirp; 277 278 dirp = opendir(_PATH_MSGS); 279 if (dirp == NULL) 280 err(errno, "%s", _PATH_MSGS); 281 282 firstmsg = 32767; 283 lastmsg = 0; 284 285 for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)){ 286 cp = dp->d_name; 287 int i = 0; 288 289 if (dp->d_ino == 0) 290 continue; 291 if (dp->d_namlen == 0) 292 continue; 293 294 if (clean) 295 snprintf(inbuf, sizeof(inbuf), "%s/%s", _PATH_MSGS, cp); 296 297 while (isdigit(*cp)) 298 i = i * 10 + *cp++ - '0'; 299 if (*cp) 300 continue; /* not a message! */ 301 302 if (clean) { 303 if (stat(inbuf, &stbuf) != 0) 304 continue; 305 if (stbuf.st_mtime < keep 306 && stbuf.st_mode&S_IWRITE) { 307 unlink(inbuf); 308 continue; 309 } 310 } 311 312 if (i > lastmsg) 313 lastmsg = i; 314 if (i < firstmsg) 315 firstmsg = i; 316 seenany = YES; 317 } 318 closedir(dirp); 319 320 if (!seenany) { 321 if (blast != 0) /* never lower the upper bound! */ 322 lastmsg = blast; 323 firstmsg = lastmsg + 1; 324 } 325 else if (blast > lastmsg) 326 lastmsg = blast; 327 328 if (!send_msg) { 329 bounds = fopen(fname, "w"); 330 if (bounds == NULL) 331 err(errno, "%s", fname); 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 err(errno, "%s", fname); 345 346 nextmsg = lastmsg + 1; 347 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, nextmsg); 348 newmsg = fopen(fname, "w"); 349 if (newmsg == NULL) 350 err(errno, "%s", fname); 351 chmod(fname, CMODE); 352 353 fprintf(bounds, "%d %d\n", firstmsg, nextmsg); 354 fclose(bounds); 355 356 sending = YES; 357 if (ruptible) 358 signal(SIGINT, onintr); 359 360 if (isatty(fileno(stdin))) { 361 ptr = getpwuid(uid)->pw_name; 362 printf("Message %d:\nFrom %s %sSubject: ", 363 nextmsg, ptr, ctime(&t)); 364 fflush(stdout); 365 fgets(inbuf, sizeof inbuf, stdin); 366 putchar('\n'); 367 fflush(stdout); 368 fprintf(newmsg, "From %s %sSubject: %s\n", 369 ptr, ctime(&t), inbuf); 370 blankline = seensubj = YES; 371 } 372 else 373 blankline = seensubj = NO; 374 for (;;) { 375 fgets(inbuf, sizeof inbuf, stdin); 376 if (feof(stdin) || ferror(stdin)) 377 break; 378 blankline = (blankline || (inbuf[0] == '\n')); 379 seensubj = (seensubj || (!blankline && (strncmp(inbuf, "Subj", 4) == 0))); 380 fputs(inbuf, newmsg); 381 } 382 #ifdef OBJECT 383 if (!seensubj) { 384 printf("NOTICE: Messages should have a Subject field!\n"); 385 #ifdef REJECT 386 unlink(fname); 387 #endif 388 exit(1); 389 } 390 #endif 391 exit(ferror(stdin)); 392 } 393 if (clean) 394 exit(0); 395 396 /* 397 * prepare to display messages 398 */ 399 totty = (isatty(fileno(stdout)) != 0); 400 use_pager = use_pager && totty; 401 402 if ((cp = getenv("HOME")) == NULL || *cp == '\0') { 403 fprintf(stderr, "Error, no home directory!\n"); 404 exit(1); 405 } 406 snprintf(fname, sizeof(fname), "%s/%s", cp, MSGSRC); 407 msgsrc = fopen(fname, "r"); 408 if (msgsrc) { 409 newrc = NO; 410 fscanf(msgsrc, "%d\n", &nextmsg); 411 fclose(msgsrc); 412 if (nextmsg > lastmsg+1) { 413 printf("Warning: bounds have been reset (%d, %d)\n", 414 firstmsg, lastmsg); 415 truncate(fname, (off_t)0); 416 newrc = YES; 417 } 418 else if (!rcfirst) 419 rcfirst = nextmsg - rcback; 420 } 421 else 422 newrc = YES; 423 msgsrc = fopen(fname, "r+"); 424 if (msgsrc == NULL) 425 msgsrc = fopen(fname, "w"); 426 if (msgsrc == NULL) 427 err(errno, "%s", fname); 428 if (rcfirst) { 429 if (rcfirst > lastmsg+1) { 430 printf("Warning: the last message is number %d.\n", 431 lastmsg); 432 rcfirst = nextmsg; 433 } 434 if (rcfirst > firstmsg) 435 firstmsg = rcfirst; /* don't set below first msg */ 436 } 437 if (newrc) { 438 nextmsg = firstmsg; 439 rewind(msgsrc); 440 fprintf(msgsrc, "%d\n", nextmsg); 441 fflush(msgsrc); 442 } 443 444 #ifdef V7 445 if (totty) { 446 struct winsize win; 447 if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1) 448 Lpp = win.ws_row; 449 if (Lpp <= 0) { 450 if (tgetent(inbuf, getenv("TERM")) <= 0 451 || (Lpp = tgetnum("li")) <= 0) { 452 Lpp = NLINES; 453 } 454 } 455 } 456 #endif 457 Lpp -= 6; /* for headers, etc. */ 458 459 already = NO; 460 prevmsg = firstmsg; 461 printing = YES; 462 if (ruptible) 463 signal(SIGINT, onintr); 464 465 /* 466 * Main program loop 467 */ 468 for (msg = firstmsg; msg <= lastmsg; msg++) { 469 470 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, msg); 471 newmsg = fopen(fname, "r"); 472 if (newmsg == NULL) 473 continue; 474 475 gfrsub(newmsg); /* get From and Subject fields */ 476 if (locomode && !local) { 477 fclose(newmsg); 478 continue; 479 } 480 481 if (qopt) { /* This has to be located here */ 482 printf("There are new messages.\n"); 483 exit(0); 484 } 485 486 if (already && !hdrs) 487 putchar('\n'); 488 489 /* 490 * Print header 491 */ 492 if (totty) 493 signal(SIGTSTP, onsusp); 494 (void) setjmp(tstpbuf); 495 already = YES; 496 nlines = 2; 497 if (seenfrom) { 498 printf("Message %d:\nFrom %s %s", msg, from, date); 499 nlines++; 500 } 501 if (seensubj) { 502 printf("Subject: %s", subj); 503 nlines++; 504 } 505 else { 506 if (seenfrom) { 507 putchar('\n'); 508 nlines++; 509 } 510 while (nlines < 6 511 && fgets(inbuf, sizeof inbuf, newmsg) 512 && inbuf[0] != '\n') { 513 fputs(inbuf, stdout); 514 nlines++; 515 } 516 } 517 518 lct = linecnt(newmsg); 519 if (lct) 520 printf("(%d%sline%s) ", lct, seensubj? " " : " more ", 521 (lct == 1) ? "" : "s"); 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 /* FALLTHROUGH */ 543 case 'X': 544 exit(0); 545 /* NOTREACHED */ 546 547 case 'q': 548 /* FALLTHROUGH */ 549 case 'Q': 550 quitit = YES; 551 printf("--Postponed--\n"); 552 exit(0); 553 /* NOTREACHED */ 554 555 case 'n': 556 /* FALLTHROUGH */ 557 case 'N': 558 if (msg >= nextmsg) sep = "Flushed"; 559 prevmsg = msg; 560 break; 561 562 case 'p': 563 /* FALLTHROUGH */ 564 case 'P': 565 use_pager = (*in++ == 'p'); 566 /* FALLTHROUGH */ 567 case '\n': 568 /* FALLTHROUGH */ 569 case 'y': 570 default: 571 if (*in == '-') { 572 msg = prevmsg-1; 573 sep = "replay"; 574 break; 575 } 576 if (isdigit(*in)) { 577 msg = next(in); 578 sep = in; 579 break; 580 } 581 582 prmesg(nlines + lct + (seensubj? 1 : 0)); 583 prevmsg = msg; 584 585 } 586 587 printf("--%s--\n", sep); 588 sep = "-"; 589 if (msg >= nextmsg) { 590 nextmsg = msg + 1; 591 rewind(msgsrc); 592 fprintf(msgsrc, "%d\n", nextmsg); 593 fflush(msgsrc); 594 } 595 if (newmsg) 596 fclose(newmsg); 597 if (quitit) 598 break; 599 } 600 601 /* 602 * Make sure .rc file gets updated 603 */ 604 if (--msg >= nextmsg) { 605 nextmsg = msg + 1; 606 rewind(msgsrc); 607 fprintf(msgsrc, "%d\n", nextmsg); 608 fflush(msgsrc); 609 } 610 if (already && !quitit && lastcmd && totty) { 611 /* 612 * save or reply to last message? 613 */ 614 msg = prevmsg; 615 ask(NOMORE); 616 if (inbuf[0] == '-' || isdigit(inbuf[0])) 617 goto cmnd; 618 } 619 if (!(already || hush || qopt)) 620 printf("No new messages.\n"); 621 exit(0); 622 /* NOTREACHED */ 623 } 624 625 static void 626 usage(void) 627 { 628 fprintf(stderr, "usage: msgs [fhlopq] [[-]number]\n"); 629 exit(1); 630 } 631 632 static void 633 prmesg(int length) 634 { 635 FILE *outf; 636 char *env_pager; 637 638 if (use_pager && length > Lpp) { 639 signal(SIGPIPE, SIG_IGN); 640 signal(SIGQUIT, SIG_IGN); 641 if ((env_pager = getenv("PAGER")) == NULL) { 642 snprintf(cmdbuf, sizeof(cmdbuf), _PATH_PAGER, Lpp); 643 } else { 644 snprintf(cmdbuf, sizeof(cmdbuf), "%s", env_pager); 645 } 646 outf = popen(cmdbuf, "w"); 647 if (!outf) 648 outf = stdout; 649 else 650 setbuf(outf, (char *)NULL); 651 } 652 else 653 outf = stdout; 654 655 if (seensubj) 656 putc('\n', outf); 657 658 while (fgets(inbuf, sizeof inbuf, newmsg)) { 659 fputs(inbuf, outf); 660 if (ferror(outf)) { 661 clearerr(outf); 662 break; 663 } 664 } 665 666 if (outf != stdout) { 667 pclose(outf); 668 signal(SIGPIPE, SIG_DFL); 669 signal(SIGQUIT, SIG_DFL); 670 } 671 else { 672 fflush(stdout); 673 } 674 675 /* force wait on output */ 676 tcdrain(fileno(stdout)); 677 } 678 679 static void 680 onintr(int unused __unused) 681 { 682 signal(SIGINT, onintr); 683 if (mailing) 684 unlink(fname); 685 if (sending) { 686 unlink(fname); 687 puts("--Killed--"); 688 exit(1); 689 } 690 if (printing) { 691 putchar('\n'); 692 if (hdrs) 693 exit(0); 694 sep = "Interrupt"; 695 if (newmsg) 696 fseeko(newmsg, (off_t)0, SEEK_END); 697 intrpflg = YES; 698 } 699 } 700 701 /* 702 * We have just gotten a susp. Suspend and prepare to resume. 703 */ 704 static void 705 onsusp(int unused __unused) 706 { 707 signal(SIGTSTP, SIG_DFL); 708 sigsetmask(0); 709 kill(0, SIGTSTP); 710 signal(SIGTSTP, onsusp); 711 if (!mailing) 712 longjmp(tstpbuf, 0); 713 } 714 715 static int 716 linecnt(FILE *f) 717 { 718 off_t oldpos = ftello(f); 719 int l = 0; 720 char lbuf[BUFSIZ]; 721 722 while (fgets(lbuf, sizeof lbuf, f)) 723 l++; 724 clearerr(f); 725 fseeko(f, oldpos, SEEK_SET); 726 return (l); 727 } 728 729 static int 730 next(char *buf) 731 { 732 int i; 733 sscanf(buf, "%d", &i); 734 sprintf(buf, "Goto %d", i); 735 return(--i); 736 } 737 738 static void 739 ask(const char *prompt) 740 { 741 char inch; 742 int n, cmsg, fd; 743 off_t oldpos; 744 FILE *cpfrom, *cpto; 745 746 printf("%s ", prompt); 747 fflush(stdout); 748 intrpflg = NO; 749 (void) fgets(inbuf, sizeof inbuf, stdin); 750 if ((n = strlen(inbuf)) > 0 && inbuf[n - 1] == '\n') 751 inbuf[n - 1] = '\0'; 752 if (intrpflg) 753 inbuf[0] = 'x'; 754 755 /* 756 * Handle 'mail' and 'save' here. 757 */ 758 if ((inch = inbuf[0]) == 's' || inch == 'm') { 759 if (inbuf[1] == '-') 760 cmsg = prevmsg; 761 else if (isdigit(inbuf[1])) 762 cmsg = atoi(&inbuf[1]); 763 else 764 cmsg = msg; 765 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, cmsg); 766 767 oldpos = ftello(newmsg); 768 769 cpfrom = fopen(fname, "r"); 770 if (!cpfrom) { 771 printf("Message %d not found\n", cmsg); 772 ask (prompt); 773 return; 774 } 775 776 if (inch == 's') { 777 in = nxtfld(inbuf); 778 if (*in) { 779 for (n=0; in[n] > ' '; n++) { /* sizeof fname? */ 780 fname[n] = in[n]; 781 } 782 fname[n] = '\0'; 783 } 784 else 785 strcpy(fname, "Messages"); 786 fd = open(fname, O_RDWR|O_EXCL|O_CREAT|O_APPEND); 787 } 788 else { 789 strcpy(fname, _PATH_TMP); 790 fd = mkstemp(fname); 791 if (fd != -1) { 792 snprintf(cmdbuf, sizeof(cmdbuf), _PATH_MAIL, 793 fname); 794 mailing = YES; 795 } 796 } 797 if (fd == -1 || (cpto = fdopen(fd, "a")) == NULL) { 798 if (fd != -1) 799 close(fd); 800 warn("%s", fname); 801 mailing = NO; 802 fseeko(newmsg, oldpos, SEEK_SET); 803 ask(prompt); 804 return; 805 } 806 807 while ((n = fread(inbuf, 1, sizeof inbuf, cpfrom))) 808 fwrite(inbuf, 1, n, cpto); 809 810 fclose(cpfrom); 811 fclose(cpto); 812 fseeko(newmsg, oldpos, SEEK_SET);/* reposition current message */ 813 if (inch == 's') 814 printf("Message %d saved in \"%s\"\n", cmsg, fname); 815 else { 816 system(cmdbuf); 817 unlink(fname); 818 mailing = NO; 819 } 820 ask(prompt); 821 } 822 } 823 824 static void 825 gfrsub(FILE *infile) 826 { 827 off_t frompos; 828 int count; 829 830 seensubj = seenfrom = NO; 831 local = YES; 832 subj[0] = from[0] = date[0] = '\0'; 833 834 /* 835 * Is this a normal message? 836 */ 837 if (fgets(inbuf, sizeof inbuf, infile)) { 838 if (strncmp(inbuf, "From", 4)==0) { 839 /* 840 * expected form starts with From 841 */ 842 seenfrom = YES; 843 frompos = ftello(infile); 844 ptr = from; 845 in = nxtfld(inbuf); 846 if (*in) { 847 count = sizeof(from) - 1; 848 while (*in && *in > ' ' && count-- > 0) { 849 if (*in == ':' || *in == '@' || 850 *in == '!') 851 local = NO; 852 *ptr++ = *in++; 853 } 854 } 855 *ptr = '\0'; 856 if (*(in = nxtfld(in))) 857 strncpy(date, in, sizeof date); 858 else { 859 date[0] = '\n'; 860 date[1] = '\0'; 861 } 862 } 863 else { 864 /* 865 * not the expected form 866 */ 867 rewind(infile); 868 return; 869 } 870 } 871 else 872 /* 873 * empty file ? 874 */ 875 return; 876 877 /* 878 * look for Subject line until EOF or a blank line 879 */ 880 while (fgets(inbuf, sizeof inbuf, infile) 881 && !(blankline = (inbuf[0] == '\n'))) { 882 /* 883 * extract Subject line 884 */ 885 if (!seensubj && strncmp(inbuf, "Subj", 4)==0) { 886 seensubj = YES; 887 frompos = ftello(infile); 888 strncpy(subj, nxtfld(inbuf), sizeof subj); 889 } 890 } 891 if (!blankline) 892 /* 893 * ran into EOF 894 */ 895 fseeko(infile, frompos, SEEK_SET); 896 897 if (!seensubj) 898 /* 899 * for possible use with Mail 900 */ 901 strncpy(subj, "(No Subject)\n", sizeof subj); 902 } 903 904 static char * 905 nxtfld(char *s) 906 { 907 if (*s) while (*s && !isspace(*s)) s++; /* skip over this field */ 908 if (*s) while (*s && isspace(*s)) s++; /* find start of next field */ 909 return (s); 910 } 911