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. 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 static const char copyright[] = 36 "@(#) Copyright (c) 1980, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #if 0 41 #ifndef lint 42 static char sccsid[] = "@(#)msgs.c 8.2 (Berkeley) 4/28/95"; 43 #endif /* not lint */ 44 #endif 45 46 #include <sys/cdefs.h> 47 __FBSDID("$FreeBSD$"); 48 49 /* 50 * msgs - a user bulletin board program 51 * 52 * usage: 53 * msgs [fhlopq] [[-]number] to read messages 54 * msgs -s to place messages 55 * msgs -c [-days] to clean up the bulletin board 56 * 57 * prompt commands are: 58 * y print message 59 * n flush message, go to next message 60 * q flush message, quit 61 * p print message, turn on 'pipe thru more' mode 62 * P print message, turn off 'pipe thru more' mode 63 * - reprint last message 64 * s[-][<num>] [<filename>] save message 65 * m[-][<num>] mail with message in temp mbox 66 * x exit without flushing this message 67 * <num> print message number <num> 68 */ 69 70 #define V7 /* will look for TERM in the environment */ 71 #define OBJECT /* will object to messages without Subjects */ 72 /* #define REJECT */ /* will reject messages without Subjects 73 (OBJECT must be defined also) */ 74 /* #define UNBUFFERED *//* use unbuffered output */ 75 76 #include <sys/param.h> 77 #include <sys/stat.h> 78 #include <ctype.h> 79 #include <dirent.h> 80 #include <err.h> 81 #include <errno.h> 82 #include <fcntl.h> 83 #include <locale.h> 84 #include <pwd.h> 85 #include <setjmp.h> 86 #include <termcap.h> 87 #include <termios.h> 88 #include <signal.h> 89 #include <stdio.h> 90 #include <stdlib.h> 91 #include <string.h> 92 #include <time.h> 93 #include <unistd.h> 94 #include "pathnames.h" 95 96 #define CMODE 0644 /* bounds file creation mode */ 97 #define NO 0 98 #define YES 1 99 #define SUPERUSER 0 /* superuser uid */ 100 #define DAEMON 1 /* daemon uid */ 101 #define NLINES 24 /* default number of lines/crt screen */ 102 #define NDAYS 21 /* default keep time for messages */ 103 #define DAYS *24*60*60 /* seconds/day */ 104 #define MSGSRC ".msgsrc" /* user's rc file */ 105 #define BOUNDS "bounds" /* message bounds file */ 106 #define NEXT "Next message? [yq]" 107 #define MORE "More? [ynq]" 108 #define NOMORE "(No more) [q] ?" 109 110 typedef char bool; 111 112 FILE *msgsrc; 113 FILE *newmsg; 114 const char *sep = "-"; 115 char inbuf[BUFSIZ]; 116 char fname[MAXPATHLEN]; 117 char cmdbuf[MAXPATHLEN + MAXPATHLEN]; 118 char subj[128]; 119 char from[128]; 120 char date[128]; 121 char *ptr; 122 char *in; 123 bool local; 124 bool ruptible; 125 bool totty; 126 bool seenfrom; 127 bool seensubj; 128 bool blankline; 129 bool printing = NO; 130 bool mailing = NO; 131 bool quitit = NO; 132 bool sending = NO; 133 bool intrpflg = NO; 134 uid_t 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 /* option initialization */ 144 bool hdrs = NO; 145 bool qopt = NO; 146 bool hush = NO; 147 bool send_msg = NO; 148 bool locomode = NO; 149 bool use_pager = NO; 150 bool clean = NO; 151 bool lastcmd = NO; 152 jmp_buf tstpbuf; 153 154 void ask(const char *); 155 void gfrsub(FILE *); 156 int linecnt(FILE *); 157 int main(int, char *[]); 158 int next(char *); 159 char *nxtfld(unsigned char *); 160 void onsusp(int); 161 void onintr(int); 162 void prmesg(int); 163 static void usage(void); 164 165 int 166 main(argc, argv) 167 int argc; char *argv[]; 168 { 169 bool newrc, already; 170 int rcfirst = 0; /* first message to print (from .rc) */ 171 int rcback = 0; /* amount to back off of rcfirst */ 172 int firstmsg = 0, nextmsg = 0, lastmsg = 0; 173 int blast = 0; 174 struct stat buf; /* stat to check access of bounds */ 175 FILE *bounds; 176 177 #ifdef UNBUFFERED 178 setbuf(stdout, NULL); 179 #endif 180 setlocale(LC_ALL, ""); 181 182 time(&t); 183 setuid(uid = getuid()); 184 ruptible = (signal(SIGINT, SIG_IGN) == SIG_DFL); 185 if (ruptible) 186 signal(SIGINT, SIG_DFL); 187 188 argc--, argv++; 189 while (argc > 0) { 190 if (isdigit(argv[0][0])) { /* starting message # */ 191 rcfirst = atoi(argv[0]); 192 } 193 else if (isdigit(argv[0][1])) { /* backward offset */ 194 rcback = atoi( &( argv[0][1] ) ); 195 } 196 else { 197 ptr = *argv; 198 while (*ptr) switch (*ptr++) { 199 200 case '-': 201 break; 202 203 case 'c': 204 if (uid != SUPERUSER && uid != DAEMON) 205 errx(1, 206 "only the super-user can use the c flag"); 207 clean = YES; 208 break; 209 210 case 'f': /* silently */ 211 hush = YES; 212 break; 213 214 case 'h': /* headers only */ 215 hdrs = YES; 216 break; 217 218 case 'l': /* local msgs only */ 219 locomode = YES; 220 break; 221 222 case 'o': /* option to save last message */ 223 lastcmd = YES; 224 break; 225 226 case 'p': /* pipe thru 'more' during long msgs */ 227 use_pager = YES; 228 break; 229 230 case 'q': /* query only */ 231 qopt = YES; 232 break; 233 234 case 's': /* sending TO msgs */ 235 send_msg = YES; 236 break; 237 238 default: 239 usage(); 240 } 241 } 242 argc--, argv++; 243 } 244 245 /* 246 * determine current message bounds 247 */ 248 snprintf(fname, sizeof(fname), "%s/%s", _PATH_MSGS, BOUNDS); 249 250 /* 251 * Test access rights to the bounds file 252 * This can be a little tricky. if(send_msg), then 253 * we will create it. We assume that if(send_msg), 254 * then you have write permission there. 255 * Else, it better be there, or we bail. 256 */ 257 if (send_msg != YES) { 258 if (stat(fname, &buf) < 0) { 259 if (hush != YES) { 260 err(errno, "%s", fname); 261 } else { 262 exit(1); 263 } 264 } 265 } 266 bounds = fopen(fname, "r"); 267 268 if (bounds != NULL) { 269 fscanf(bounds, "%d %d\n", &firstmsg, &lastmsg); 270 fclose(bounds); 271 blast = lastmsg; /* save upper bound */ 272 } 273 274 if (clean) 275 keep = t - (rcback? rcback : NDAYS) DAYS; 276 277 if (clean || bounds == NULL) { /* relocate message bounds */ 278 struct dirent *dp; 279 struct stat stbuf; 280 bool seenany = NO; 281 DIR *dirp; 282 283 dirp = opendir(_PATH_MSGS); 284 if (dirp == NULL) 285 err(errno, "%s", _PATH_MSGS); 286 287 firstmsg = 32767; 288 lastmsg = 0; 289 290 for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)){ 291 register char *cp = dp->d_name; 292 register int i = 0; 293 294 if (dp->d_ino == 0) 295 continue; 296 if (dp->d_namlen == 0) 297 continue; 298 299 if (clean) 300 snprintf(inbuf, sizeof(inbuf), "%s/%s", _PATH_MSGS, cp); 301 302 while (isdigit(*cp)) 303 i = i * 10 + *cp++ - '0'; 304 if (*cp) 305 continue; /* not a message! */ 306 307 if (clean) { 308 if (stat(inbuf, &stbuf) != 0) 309 continue; 310 if (stbuf.st_mtime < keep 311 && stbuf.st_mode&S_IWRITE) { 312 unlink(inbuf); 313 continue; 314 } 315 } 316 317 if (i > lastmsg) 318 lastmsg = i; 319 if (i < firstmsg) 320 firstmsg = i; 321 seenany = YES; 322 } 323 closedir(dirp); 324 325 if (!seenany) { 326 if (blast != 0) /* never lower the upper bound! */ 327 lastmsg = blast; 328 firstmsg = lastmsg + 1; 329 } 330 else if (blast > lastmsg) 331 lastmsg = blast; 332 333 if (!send_msg) { 334 bounds = fopen(fname, "w"); 335 if (bounds == NULL) 336 err(errno, "%s", fname); 337 chmod(fname, CMODE); 338 fprintf(bounds, "%d %d\n", firstmsg, lastmsg); 339 fclose(bounds); 340 } 341 } 342 343 if (send_msg) { 344 /* 345 * Send mode - place msgs in _PATH_MSGS 346 */ 347 bounds = fopen(fname, "w"); 348 if (bounds == NULL) 349 err(errno, "%s", fname); 350 351 nextmsg = lastmsg + 1; 352 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, nextmsg); 353 newmsg = fopen(fname, "w"); 354 if (newmsg == NULL) 355 err(errno, "%s", fname); 356 chmod(fname, CMODE); 357 358 fprintf(bounds, "%d %d\n", firstmsg, nextmsg); 359 fclose(bounds); 360 361 sending = YES; 362 if (ruptible) 363 signal(SIGINT, onintr); 364 365 if (isatty(fileno(stdin))) { 366 ptr = getpwuid(uid)->pw_name; 367 printf("Message %d:\nFrom %s %sSubject: ", 368 nextmsg, ptr, ctime(&t)); 369 fflush(stdout); 370 fgets(inbuf, sizeof inbuf, stdin); 371 putchar('\n'); 372 fflush(stdout); 373 fprintf(newmsg, "From %s %sSubject: %s\n", 374 ptr, ctime(&t), inbuf); 375 blankline = seensubj = YES; 376 } 377 else 378 blankline = seensubj = NO; 379 for (;;) { 380 fgets(inbuf, sizeof inbuf, stdin); 381 if (feof(stdin) || ferror(stdin)) 382 break; 383 blankline = (blankline || (inbuf[0] == '\n')); 384 seensubj = (seensubj || (!blankline && (strncmp(inbuf, "Subj", 4) == 0))); 385 fputs(inbuf, newmsg); 386 } 387 #ifdef OBJECT 388 if (!seensubj) { 389 printf("NOTICE: Messages should have a Subject field!\n"); 390 #ifdef REJECT 391 unlink(fname); 392 #endif 393 exit(1); 394 } 395 #endif 396 exit(ferror(stdin)); 397 } 398 if (clean) 399 exit(0); 400 401 /* 402 * prepare to display messages 403 */ 404 totty = (isatty(fileno(stdout)) != 0); 405 use_pager = use_pager && totty; 406 407 snprintf(fname, sizeof(fname), "%s/%s", getenv("HOME"), MSGSRC); 408 msgsrc = fopen(fname, "r"); 409 if (msgsrc) { 410 newrc = NO; 411 fscanf(msgsrc, "%d\n", &nextmsg); 412 fclose(msgsrc); 413 if (nextmsg > lastmsg+1) { 414 printf("Warning: bounds have been reset (%d, %d)\n", 415 firstmsg, lastmsg); 416 truncate(fname, (off_t)0); 417 newrc = YES; 418 } 419 else if (!rcfirst) 420 rcfirst = nextmsg - rcback; 421 } 422 else 423 newrc = YES; 424 msgsrc = fopen(fname, "r+"); 425 if (msgsrc == NULL) 426 msgsrc = fopen(fname, "w"); 427 if (msgsrc == NULL) 428 err(errno, "%s", fname); 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 rewind(msgsrc); 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 snprintf(fname, sizeof(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 /* 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() 627 { 628 fprintf(stderr, "usage: msgs [fhlopq] [[-]number]\n"); 629 exit(1); 630 } 631 632 void 633 prmesg(length) 634 int length; 635 { 636 FILE *outf; 637 char *env_pager; 638 639 if (use_pager && length > Lpp) { 640 signal(SIGPIPE, SIG_IGN); 641 signal(SIGQUIT, SIG_IGN); 642 if ((env_pager = getenv("PAGER")) == NULL) { 643 snprintf(cmdbuf, sizeof(cmdbuf), _PATH_PAGER, Lpp); 644 } else { 645 snprintf(cmdbuf, sizeof(cmdbuf), "%s", env_pager); 646 } 647 outf = popen(cmdbuf, "w"); 648 if (!outf) 649 outf = stdout; 650 else 651 setbuf(outf, (char *)NULL); 652 } 653 else 654 outf = stdout; 655 656 if (seensubj) 657 putc('\n', outf); 658 659 while (fgets(inbuf, sizeof inbuf, newmsg)) { 660 fputs(inbuf, outf); 661 if (ferror(outf)) { 662 clearerr(outf); 663 break; 664 } 665 } 666 667 if (outf != stdout) { 668 pclose(outf); 669 signal(SIGPIPE, SIG_DFL); 670 signal(SIGQUIT, SIG_DFL); 671 } 672 else { 673 fflush(stdout); 674 } 675 676 /* force wait on output */ 677 tcdrain(fileno(stdout)); 678 } 679 680 void 681 onintr(unused) 682 int unused __unused; 683 { 684 signal(SIGINT, onintr); 685 if (mailing) 686 unlink(fname); 687 if (sending) { 688 unlink(fname); 689 puts("--Killed--"); 690 exit(1); 691 } 692 if (printing) { 693 putchar('\n'); 694 if (hdrs) 695 exit(0); 696 sep = "Interrupt"; 697 if (newmsg) 698 fseeko(newmsg, (off_t)0, SEEK_END); 699 intrpflg = YES; 700 } 701 } 702 703 /* 704 * We have just gotten a susp. Suspend and prepare to resume. 705 */ 706 void 707 onsusp(unused) 708 int unused __unused; 709 { 710 signal(SIGTSTP, SIG_DFL); 711 sigsetmask(0); 712 kill(0, SIGTSTP); 713 signal(SIGTSTP, onsusp); 714 if (!mailing) 715 longjmp(tstpbuf, 0); 716 } 717 718 int 719 linecnt(f) 720 FILE *f; 721 { 722 off_t oldpos = ftello(f); 723 int l = 0; 724 char lbuf[BUFSIZ]; 725 726 while (fgets(lbuf, sizeof lbuf, f)) 727 l++; 728 clearerr(f); 729 fseeko(f, oldpos, SEEK_SET); 730 return (l); 731 } 732 733 int 734 next(buf) 735 char *buf; 736 { 737 int i; 738 sscanf(buf, "%d", &i); 739 sprintf(buf, "Goto %d", i); 740 return(--i); 741 } 742 743 void 744 ask(prompt) 745 const char *prompt; 746 { 747 char inch; 748 int n, cmsg, fd; 749 off_t oldpos; 750 FILE *cpfrom, *cpto; 751 752 printf("%s ", prompt); 753 fflush(stdout); 754 intrpflg = NO; 755 (void) fgets(inbuf, sizeof inbuf, stdin); 756 if ((n = strlen(inbuf)) > 0 && inbuf[n - 1] == '\n') 757 inbuf[n - 1] = '\0'; 758 if (intrpflg) 759 inbuf[0] = 'x'; 760 761 /* 762 * Handle 'mail' and 'save' here. 763 */ 764 if ((inch = inbuf[0]) == 's' || inch == 'm') { 765 if (inbuf[1] == '-') 766 cmsg = prevmsg; 767 else if (isdigit(inbuf[1])) 768 cmsg = atoi(&inbuf[1]); 769 else 770 cmsg = msg; 771 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, cmsg); 772 773 oldpos = ftello(newmsg); 774 775 cpfrom = fopen(fname, "r"); 776 if (!cpfrom) { 777 printf("Message %d not found\n", cmsg); 778 ask (prompt); 779 return; 780 } 781 782 if (inch == 's') { 783 in = nxtfld(inbuf); 784 if (*in) { 785 for (n=0; in[n] > ' '; n++) { /* sizeof fname? */ 786 fname[n] = in[n]; 787 } 788 fname[n] = NULL; 789 } 790 else 791 strcpy(fname, "Messages"); 792 fd = open(fname, O_RDWR|O_EXCL|O_CREAT|O_APPEND); 793 } 794 else { 795 strcpy(fname, _PATH_TMP); 796 fd = mkstemp(fname); 797 if (fd != -1) { 798 snprintf(cmdbuf, sizeof(cmdbuf), _PATH_MAIL, 799 fname); 800 mailing = YES; 801 } 802 } 803 if (fd == -1 || (cpto = fdopen(fd, "a")) == NULL) { 804 if (fd != -1) 805 close(fd); 806 warn("%s", fname); 807 mailing = NO; 808 fseeko(newmsg, oldpos, SEEK_SET); 809 ask(prompt); 810 return; 811 } 812 813 while ((n = fread(inbuf, 1, sizeof inbuf, cpfrom))) 814 fwrite(inbuf, 1, n, cpto); 815 816 fclose(cpfrom); 817 fclose(cpto); 818 fseeko(newmsg, oldpos, SEEK_SET);/* reposition current message */ 819 if (inch == 's') 820 printf("Message %d saved in \"%s\"\n", cmsg, fname); 821 else { 822 system(cmdbuf); 823 unlink(fname); 824 mailing = NO; 825 } 826 ask(prompt); 827 } 828 } 829 830 void 831 gfrsub(infile) 832 FILE *infile; 833 { 834 off_t frompos; 835 int count; 836 837 seensubj = seenfrom = NO; 838 local = YES; 839 subj[0] = from[0] = date[0] = NULL; 840 841 /* 842 * Is this a normal message? 843 */ 844 if (fgets(inbuf, sizeof inbuf, infile)) { 845 if (strncmp(inbuf, "From", 4)==0) { 846 /* 847 * expected form starts with From 848 */ 849 seenfrom = YES; 850 frompos = ftello(infile); 851 ptr = from; 852 in = nxtfld(inbuf); 853 if (*in) { 854 count = sizeof(from) - 1; 855 while (*in && *in > ' ' && count-- > 0) { 856 if (*in == ':' || *in == '@' || 857 *in == '!') 858 local = NO; 859 *ptr++ = *in++; 860 } 861 } 862 *ptr = NULL; 863 if (*(in = nxtfld(in))) 864 strncpy(date, in, sizeof date); 865 else { 866 date[0] = '\n'; 867 date[1] = NULL; 868 } 869 } 870 else { 871 /* 872 * not the expected form 873 */ 874 rewind(infile); 875 return; 876 } 877 } 878 else 879 /* 880 * empty file ? 881 */ 882 return; 883 884 /* 885 * look for Subject line until EOF or a blank line 886 */ 887 while (fgets(inbuf, sizeof inbuf, infile) 888 && !(blankline = (inbuf[0] == '\n'))) { 889 /* 890 * extract Subject line 891 */ 892 if (!seensubj && strncmp(inbuf, "Subj", 4)==0) { 893 seensubj = YES; 894 frompos = ftello(infile); 895 strncpy(subj, nxtfld(inbuf), sizeof subj); 896 } 897 } 898 if (!blankline) 899 /* 900 * ran into EOF 901 */ 902 fseeko(infile, frompos, SEEK_SET); 903 904 if (!seensubj) 905 /* 906 * for possible use with Mail 907 */ 908 strncpy(subj, "(No Subject)\n", sizeof subj); 909 } 910 911 char * 912 nxtfld(s) 913 unsigned char *s; 914 { 915 if (*s) while (*s && !isspace(*s)) s++; /* skip over this field */ 916 if (*s) while (*s && isspace(*s)) s++; /* find start of next field */ 917 return (s); 918 } 919