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 static void ask(const char *); 155 static void gfrsub(FILE *); 156 static int linecnt(FILE *); 157 static int next(char *); 158 static char *nxtfld(char *); 159 static void onsusp(int); 160 static void onintr(int); 161 static void prmesg(int); 162 static void usage(void); 163 164 int 165 main(int argc, char *argv[]) 166 { 167 bool newrc, already; 168 int rcfirst = 0; /* first message to print (from .rc) */ 169 int rcback = 0; /* amount to back off of rcfirst */ 170 int firstmsg = 0, nextmsg = 0, lastmsg = 0; 171 int blast = 0; 172 struct stat buf; /* stat to check access of bounds */ 173 FILE *bounds; 174 char *cp; 175 176 #ifdef UNBUFFERED 177 setbuf(stdout, NULL); 178 #endif 179 setlocale(LC_ALL, ""); 180 181 time(&t); 182 setuid(uid = getuid()); 183 ruptible = (signal(SIGINT, SIG_IGN) == SIG_DFL); 184 if (ruptible) 185 signal(SIGINT, SIG_DFL); 186 187 argc--, argv++; 188 while (argc > 0) { 189 if (isdigit(argv[0][0])) { /* starting message # */ 190 rcfirst = atoi(argv[0]); 191 } 192 else if (isdigit(argv[0][1])) { /* backward offset */ 193 rcback = atoi( &( argv[0][1] ) ); 194 } 195 else { 196 ptr = *argv; 197 while (*ptr) switch (*ptr++) { 198 199 case '-': 200 break; 201 202 case 'c': 203 if (uid != SUPERUSER && uid != DAEMON) 204 errx(1, 205 "only the super-user can use the c flag"); 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 's': /* sending TO msgs */ 234 send_msg = YES; 235 break; 236 237 default: 238 usage(); 239 } 240 } 241 argc--, argv++; 242 } 243 244 /* 245 * determine current message bounds 246 */ 247 snprintf(fname, sizeof(fname), "%s/%s", _PATH_MSGS, BOUNDS); 248 249 /* 250 * Test access rights to the bounds file 251 * This can be a little tricky. if(send_msg), then 252 * we will create it. We assume that if(send_msg), 253 * then you have write permission there. 254 * Else, it better be there, or we bail. 255 */ 256 if (send_msg != YES) { 257 if (stat(fname, &buf) < 0) { 258 if (hush != YES) { 259 err(errno, "%s", fname); 260 } else { 261 exit(1); 262 } 263 } 264 } 265 bounds = fopen(fname, "r"); 266 267 if (bounds != NULL) { 268 fscanf(bounds, "%d %d\n", &firstmsg, &lastmsg); 269 fclose(bounds); 270 blast = lastmsg; /* save upper bound */ 271 } 272 273 if (clean) 274 keep = t - (rcback? rcback : NDAYS) DAYS; 275 276 if (clean || bounds == NULL) { /* relocate message bounds */ 277 struct dirent *dp; 278 struct stat stbuf; 279 bool seenany = NO; 280 DIR *dirp; 281 282 dirp = opendir(_PATH_MSGS); 283 if (dirp == NULL) 284 err(errno, "%s", _PATH_MSGS); 285 286 firstmsg = 32767; 287 lastmsg = 0; 288 289 for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)){ 290 cp = dp->d_name; 291 int i = 0; 292 293 if (dp->d_ino == 0) 294 continue; 295 if (dp->d_namlen == 0) 296 continue; 297 298 if (clean) 299 snprintf(inbuf, sizeof(inbuf), "%s/%s", _PATH_MSGS, cp); 300 301 while (isdigit(*cp)) 302 i = i * 10 + *cp++ - '0'; 303 if (*cp) 304 continue; /* not a message! */ 305 306 if (clean) { 307 if (stat(inbuf, &stbuf) != 0) 308 continue; 309 if (stbuf.st_mtime < keep 310 && stbuf.st_mode&S_IWRITE) { 311 unlink(inbuf); 312 continue; 313 } 314 } 315 316 if (i > lastmsg) 317 lastmsg = i; 318 if (i < firstmsg) 319 firstmsg = i; 320 seenany = YES; 321 } 322 closedir(dirp); 323 324 if (!seenany) { 325 if (blast != 0) /* never lower the upper bound! */ 326 lastmsg = blast; 327 firstmsg = lastmsg + 1; 328 } 329 else if (blast > lastmsg) 330 lastmsg = blast; 331 332 if (!send_msg) { 333 bounds = fopen(fname, "w"); 334 if (bounds == NULL) 335 err(errno, "%s", fname); 336 chmod(fname, CMODE); 337 fprintf(bounds, "%d %d\n", firstmsg, lastmsg); 338 fclose(bounds); 339 } 340 } 341 342 if (send_msg) { 343 /* 344 * Send mode - place msgs in _PATH_MSGS 345 */ 346 bounds = fopen(fname, "w"); 347 if (bounds == NULL) 348 err(errno, "%s", fname); 349 350 nextmsg = lastmsg + 1; 351 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, nextmsg); 352 newmsg = fopen(fname, "w"); 353 if (newmsg == NULL) 354 err(errno, "%s", fname); 355 chmod(fname, CMODE); 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 ptr = getpwuid(uid)->pw_name; 366 printf("Message %d:\nFrom %s %sSubject: ", 367 nextmsg, ptr, ctime(&t)); 368 fflush(stdout); 369 fgets(inbuf, sizeof inbuf, stdin); 370 putchar('\n'); 371 fflush(stdout); 372 fprintf(newmsg, "From %s %sSubject: %s\n", 373 ptr, ctime(&t), inbuf); 374 blankline = seensubj = YES; 375 } 376 else 377 blankline = seensubj = NO; 378 for (;;) { 379 fgets(inbuf, sizeof inbuf, stdin); 380 if (feof(stdin) || ferror(stdin)) 381 break; 382 blankline = (blankline || (inbuf[0] == '\n')); 383 seensubj = (seensubj || (!blankline && (strncmp(inbuf, "Subj", 4) == 0))); 384 fputs(inbuf, newmsg); 385 } 386 #ifdef OBJECT 387 if (!seensubj) { 388 printf("NOTICE: Messages should have a Subject field!\n"); 389 #ifdef REJECT 390 unlink(fname); 391 #endif 392 exit(1); 393 } 394 #endif 395 exit(ferror(stdin)); 396 } 397 if (clean) 398 exit(0); 399 400 /* 401 * prepare to display messages 402 */ 403 totty = (isatty(fileno(stdout)) != 0); 404 use_pager = use_pager && totty; 405 406 if ((cp = getenv("HOME")) == NULL || *cp == '\0') { 407 fprintf(stderr, "Error, no home directory!\n"); 408 exit(1); 409 } 410 snprintf(fname, sizeof(fname), "%s/%s", cp, 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 err(errno, "%s", fname); 432 if (rcfirst) { 433 if (rcfirst > lastmsg+1) { 434 printf("Warning: the last message is number %d.\n", 435 lastmsg); 436 rcfirst = nextmsg; 437 } 438 if (rcfirst > firstmsg) 439 firstmsg = rcfirst; /* don't set below first msg */ 440 } 441 if (newrc) { 442 nextmsg = firstmsg; 443 rewind(msgsrc); 444 fprintf(msgsrc, "%d\n", nextmsg); 445 fflush(msgsrc); 446 } 447 448 #ifdef V7 449 if (totty) { 450 struct winsize win; 451 if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1) 452 Lpp = win.ws_row; 453 if (Lpp <= 0) { 454 if (tgetent(inbuf, getenv("TERM")) <= 0 455 || (Lpp = tgetnum("li")) <= 0) { 456 Lpp = NLINES; 457 } 458 } 459 } 460 #endif 461 Lpp -= 6; /* for headers, etc. */ 462 463 already = NO; 464 prevmsg = firstmsg; 465 printing = YES; 466 if (ruptible) 467 signal(SIGINT, onintr); 468 469 /* 470 * Main program loop 471 */ 472 for (msg = firstmsg; msg <= lastmsg; msg++) { 473 474 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, msg); 475 newmsg = fopen(fname, "r"); 476 if (newmsg == NULL) 477 continue; 478 479 gfrsub(newmsg); /* get From and Subject fields */ 480 if (locomode && !local) { 481 fclose(newmsg); 482 continue; 483 } 484 485 if (qopt) { /* This has to be located here */ 486 printf("There are new messages.\n"); 487 exit(0); 488 } 489 490 if (already && !hdrs) 491 putchar('\n'); 492 493 /* 494 * Print header 495 */ 496 if (totty) 497 signal(SIGTSTP, onsusp); 498 (void) setjmp(tstpbuf); 499 already = YES; 500 nlines = 2; 501 if (seenfrom) { 502 printf("Message %d:\nFrom %s %s", msg, from, date); 503 nlines++; 504 } 505 if (seensubj) { 506 printf("Subject: %s", subj); 507 nlines++; 508 } 509 else { 510 if (seenfrom) { 511 putchar('\n'); 512 nlines++; 513 } 514 while (nlines < 6 515 && fgets(inbuf, sizeof inbuf, newmsg) 516 && inbuf[0] != '\n') { 517 fputs(inbuf, stdout); 518 nlines++; 519 } 520 } 521 522 lct = linecnt(newmsg); 523 if (lct) 524 printf("(%d%sline%s) ", lct, seensubj? " " : " more ", 525 (lct == 1) ? "" : "s"); 526 527 if (hdrs) { 528 printf("\n-----\n"); 529 fclose(newmsg); 530 continue; 531 } 532 533 /* 534 * Ask user for command 535 */ 536 if (totty) 537 ask(lct? MORE : (msg==lastmsg? NOMORE : NEXT)); 538 else 539 inbuf[0] = 'y'; 540 if (totty) 541 signal(SIGTSTP, SIG_DFL); 542 cmnd: 543 in = inbuf; 544 switch (*in) { 545 case 'x': 546 /* FALLTHROUGH */ 547 case 'X': 548 exit(0); 549 /* NOTREACHED */ 550 551 case 'q': 552 /* FALLTHROUGH */ 553 case 'Q': 554 quitit = YES; 555 printf("--Postponed--\n"); 556 exit(0); 557 /* NOTREACHED */ 558 559 case 'n': 560 /* FALLTHROUGH */ 561 case 'N': 562 if (msg >= nextmsg) sep = "Flushed"; 563 prevmsg = msg; 564 break; 565 566 case 'p': 567 /* FALLTHROUGH */ 568 case 'P': 569 use_pager = (*in++ == 'p'); 570 /* FALLTHROUGH */ 571 case '\n': 572 /* FALLTHROUGH */ 573 case 'y': 574 default: 575 if (*in == '-') { 576 msg = prevmsg-1; 577 sep = "replay"; 578 break; 579 } 580 if (isdigit(*in)) { 581 msg = next(in); 582 sep = in; 583 break; 584 } 585 586 prmesg(nlines + lct + (seensubj? 1 : 0)); 587 prevmsg = msg; 588 589 } 590 591 printf("--%s--\n", sep); 592 sep = "-"; 593 if (msg >= nextmsg) { 594 nextmsg = msg + 1; 595 rewind(msgsrc); 596 fprintf(msgsrc, "%d\n", nextmsg); 597 fflush(msgsrc); 598 } 599 if (newmsg) 600 fclose(newmsg); 601 if (quitit) 602 break; 603 } 604 605 /* 606 * Make sure .rc file gets updated 607 */ 608 if (--msg >= nextmsg) { 609 nextmsg = msg + 1; 610 rewind(msgsrc); 611 fprintf(msgsrc, "%d\n", nextmsg); 612 fflush(msgsrc); 613 } 614 if (already && !quitit && lastcmd && totty) { 615 /* 616 * save or reply to last message? 617 */ 618 msg = prevmsg; 619 ask(NOMORE); 620 if (inbuf[0] == '-' || isdigit(inbuf[0])) 621 goto cmnd; 622 } 623 if (!(already || hush || qopt)) 624 printf("No new messages.\n"); 625 exit(0); 626 /* NOTREACHED */ 627 } 628 629 static void 630 usage(void) 631 { 632 fprintf(stderr, "usage: msgs [fhlopq] [[-]number]\n"); 633 exit(1); 634 } 635 636 static void 637 prmesg(int length) 638 { 639 FILE *outf; 640 char *env_pager; 641 642 if (use_pager && length > Lpp) { 643 signal(SIGPIPE, SIG_IGN); 644 signal(SIGQUIT, SIG_IGN); 645 if ((env_pager = getenv("PAGER")) == NULL) { 646 snprintf(cmdbuf, sizeof(cmdbuf), _PATH_PAGER, Lpp); 647 } else { 648 snprintf(cmdbuf, sizeof(cmdbuf), "%s", env_pager); 649 } 650 outf = popen(cmdbuf, "w"); 651 if (!outf) 652 outf = stdout; 653 else 654 setbuf(outf, (char *)NULL); 655 } 656 else 657 outf = stdout; 658 659 if (seensubj) 660 putc('\n', outf); 661 662 while (fgets(inbuf, sizeof inbuf, newmsg)) { 663 fputs(inbuf, outf); 664 if (ferror(outf)) { 665 clearerr(outf); 666 break; 667 } 668 } 669 670 if (outf != stdout) { 671 pclose(outf); 672 signal(SIGPIPE, SIG_DFL); 673 signal(SIGQUIT, SIG_DFL); 674 } 675 else { 676 fflush(stdout); 677 } 678 679 /* force wait on output */ 680 tcdrain(fileno(stdout)); 681 } 682 683 static void 684 onintr(int unused __unused) 685 { 686 signal(SIGINT, onintr); 687 if (mailing) 688 unlink(fname); 689 if (sending) { 690 unlink(fname); 691 puts("--Killed--"); 692 exit(1); 693 } 694 if (printing) { 695 putchar('\n'); 696 if (hdrs) 697 exit(0); 698 sep = "Interrupt"; 699 if (newmsg) 700 fseeko(newmsg, (off_t)0, SEEK_END); 701 intrpflg = YES; 702 } 703 } 704 705 /* 706 * We have just gotten a susp. Suspend and prepare to resume. 707 */ 708 static void 709 onsusp(int unused __unused) 710 { 711 signal(SIGTSTP, SIG_DFL); 712 sigsetmask(0); 713 kill(0, SIGTSTP); 714 signal(SIGTSTP, onsusp); 715 if (!mailing) 716 longjmp(tstpbuf, 0); 717 } 718 719 static int 720 linecnt(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 static int 734 next(char *buf) 735 { 736 int i; 737 sscanf(buf, "%d", &i); 738 sprintf(buf, "Goto %d", i); 739 return(--i); 740 } 741 742 static void 743 ask(const char *prompt) 744 { 745 char inch; 746 int n, cmsg, fd; 747 off_t oldpos; 748 FILE *cpfrom, *cpto; 749 750 printf("%s ", prompt); 751 fflush(stdout); 752 intrpflg = NO; 753 (void) fgets(inbuf, sizeof inbuf, stdin); 754 if ((n = strlen(inbuf)) > 0 && inbuf[n - 1] == '\n') 755 inbuf[n - 1] = '\0'; 756 if (intrpflg) 757 inbuf[0] = 'x'; 758 759 /* 760 * Handle 'mail' and 'save' here. 761 */ 762 if ((inch = inbuf[0]) == 's' || inch == 'm') { 763 if (inbuf[1] == '-') 764 cmsg = prevmsg; 765 else if (isdigit(inbuf[1])) 766 cmsg = atoi(&inbuf[1]); 767 else 768 cmsg = msg; 769 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, cmsg); 770 771 oldpos = ftello(newmsg); 772 773 cpfrom = fopen(fname, "r"); 774 if (!cpfrom) { 775 printf("Message %d not found\n", cmsg); 776 ask (prompt); 777 return; 778 } 779 780 if (inch == 's') { 781 in = nxtfld(inbuf); 782 if (*in) { 783 for (n=0; in[n] > ' '; n++) { /* sizeof fname? */ 784 fname[n] = in[n]; 785 } 786 fname[n] = '\0'; 787 } 788 else 789 strcpy(fname, "Messages"); 790 fd = open(fname, O_RDWR|O_EXCL|O_CREAT|O_APPEND); 791 } 792 else { 793 strcpy(fname, _PATH_TMP); 794 fd = mkstemp(fname); 795 if (fd != -1) { 796 snprintf(cmdbuf, sizeof(cmdbuf), _PATH_MAIL, 797 fname); 798 mailing = YES; 799 } 800 } 801 if (fd == -1 || (cpto = fdopen(fd, "a")) == NULL) { 802 if (fd != -1) 803 close(fd); 804 warn("%s", fname); 805 mailing = NO; 806 fseeko(newmsg, oldpos, SEEK_SET); 807 ask(prompt); 808 return; 809 } 810 811 while ((n = fread(inbuf, 1, sizeof inbuf, cpfrom))) 812 fwrite(inbuf, 1, n, cpto); 813 814 fclose(cpfrom); 815 fclose(cpto); 816 fseeko(newmsg, oldpos, SEEK_SET);/* reposition current message */ 817 if (inch == 's') 818 printf("Message %d saved in \"%s\"\n", cmsg, fname); 819 else { 820 system(cmdbuf); 821 unlink(fname); 822 mailing = NO; 823 } 824 ask(prompt); 825 } 826 } 827 828 static void 829 gfrsub(FILE *infile) 830 { 831 off_t frompos; 832 int count; 833 834 seensubj = seenfrom = NO; 835 local = YES; 836 subj[0] = from[0] = date[0] = '\0'; 837 838 /* 839 * Is this a normal message? 840 */ 841 if (fgets(inbuf, sizeof inbuf, infile)) { 842 if (strncmp(inbuf, "From", 4)==0) { 843 /* 844 * expected form starts with From 845 */ 846 seenfrom = YES; 847 frompos = ftello(infile); 848 ptr = from; 849 in = nxtfld(inbuf); 850 if (*in) { 851 count = sizeof(from) - 1; 852 while (*in && *in > ' ' && count-- > 0) { 853 if (*in == ':' || *in == '@' || 854 *in == '!') 855 local = NO; 856 *ptr++ = *in++; 857 } 858 } 859 *ptr = '\0'; 860 if (*(in = nxtfld(in))) 861 strncpy(date, in, sizeof date); 862 else { 863 date[0] = '\n'; 864 date[1] = '\0'; 865 } 866 } 867 else { 868 /* 869 * not the expected form 870 */ 871 rewind(infile); 872 return; 873 } 874 } 875 else 876 /* 877 * empty file ? 878 */ 879 return; 880 881 /* 882 * look for Subject line until EOF or a blank line 883 */ 884 while (fgets(inbuf, sizeof inbuf, infile) 885 && !(blankline = (inbuf[0] == '\n'))) { 886 /* 887 * extract Subject line 888 */ 889 if (!seensubj && strncmp(inbuf, "Subj", 4)==0) { 890 seensubj = YES; 891 frompos = ftello(infile); 892 strncpy(subj, nxtfld(inbuf), sizeof subj); 893 } 894 } 895 if (!blankline) 896 /* 897 * ran into EOF 898 */ 899 fseeko(infile, frompos, SEEK_SET); 900 901 if (!seensubj) 902 /* 903 * for possible use with Mail 904 */ 905 strncpy(subj, "(No Subject)\n", sizeof subj); 906 } 907 908 static char * 909 nxtfld(char *s) 910 { 911 if (*s) while (*s && !isspace(*s)) s++; /* skip over this field */ 912 if (*s) while (*s && isspace(*s)) s++; /* find start of next field */ 913 return (s); 914 } 915