1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef lint 33 static const char copyright[] = 34 "@(#) Copyright (c) 1980, 1993\n\ 35 The Regents of the University of California. All rights reserved.\n"; 36 #endif /* not lint */ 37 38 #if 0 39 #ifndef lint 40 static char sccsid[] = "@(#)msgs.c 8.2 (Berkeley) 4/28/95"; 41 #endif /* not lint */ 42 #endif 43 44 #include <sys/cdefs.h> 45 __FBSDID("$FreeBSD$"); 46 47 /* 48 * msgs - a user bulletin board program 49 * 50 * usage: 51 * msgs [fhlopq] [[-]number] to read messages 52 * msgs -s to place messages 53 * msgs -c [-days] to clean up the bulletin board 54 * 55 * prompt commands are: 56 * y print message 57 * n flush message, go to next message 58 * q flush message, quit 59 * p print message, turn on 'pipe thru more' mode 60 * P print message, turn off 'pipe thru more' mode 61 * - reprint last message 62 * s[-][<num>] [<filename>] save message 63 * m[-][<num>] mail with message in temp mbox 64 * x exit without flushing this message 65 * <num> print message number <num> 66 */ 67 68 #define V7 /* will look for TERM in the environment */ 69 #define OBJECT /* will object to messages without Subjects */ 70 /* #define REJECT */ /* will reject messages without Subjects 71 (OBJECT must be defined also) */ 72 /* #define UNBUFFERED *//* use unbuffered output */ 73 74 #include <sys/param.h> 75 #include <sys/stat.h> 76 #include <ctype.h> 77 #include <dirent.h> 78 #include <err.h> 79 #include <errno.h> 80 #include <fcntl.h> 81 #include <locale.h> 82 #include <pwd.h> 83 #include <setjmp.h> 84 #include <termcap.h> 85 #include <termios.h> 86 #include <signal.h> 87 #include <stdio.h> 88 #include <stdlib.h> 89 #include <string.h> 90 #include <time.h> 91 #include <unistd.h> 92 #include "pathnames.h" 93 94 #define CMODE 0644 /* bounds file creation mode */ 95 #define NO 0 96 #define YES 1 97 #define SUPERUSER 0 /* superuser uid */ 98 #define DAEMON 1 /* daemon uid */ 99 #define NLINES 24 /* default number of lines/crt screen */ 100 #define NDAYS 21 /* default keep time for messages */ 101 #define DAYS *24*60*60 /* seconds/day */ 102 #define MSGSRC ".msgsrc" /* user's rc file */ 103 #define BOUNDS "bounds" /* message bounds file */ 104 #define NEXT "Next message? [yq]" 105 #define MORE "More? [ynq]" 106 #define NOMORE "(No more) [q] ?" 107 108 typedef char bool; 109 110 static FILE *msgsrc; 111 static FILE *newmsg; 112 static const char *sep = "-"; 113 static char inbuf[BUFSIZ]; 114 static char fname[MAXPATHLEN]; 115 static char cmdbuf[MAXPATHLEN + MAXPATHLEN]; 116 static char subj[128]; 117 static char from[128]; 118 static char date[128]; 119 static char *ptr; 120 static char *in; 121 static bool local; 122 static bool ruptible; 123 static bool totty; 124 static bool seenfrom; 125 static bool seensubj; 126 static bool blankline; 127 static bool printing = NO; 128 static bool mailing = NO; 129 static bool quitit = NO; 130 static bool sending = NO; 131 static bool intrpflg = NO; 132 static uid_t uid; 133 static int msg; 134 static int prevmsg; 135 static int lct; 136 static int nlines; 137 static int Lpp = 0; 138 static time_t t; 139 static time_t keep; 140 141 /* option initialization */ 142 static bool hdrs = NO; 143 static bool qopt = NO; 144 static bool hush = NO; 145 static bool send_msg = NO; 146 static bool locomode = NO; 147 static bool use_pager = NO; 148 static bool clean = NO; 149 static bool lastcmd = NO; 150 static jmp_buf tstpbuf; 151 152 static void ask(const char *); 153 static void gfrsub(FILE *); 154 static int linecnt(FILE *); 155 static int next(char *); 156 static char *nxtfld(char *); 157 static void onsusp(int); 158 static void onintr(int); 159 static void prmesg(int); 160 static void usage(void); 161 162 int 163 main(int argc, char *argv[]) 164 { 165 bool newrc, already; 166 int rcfirst = 0; /* first message to print (from .rc) */ 167 int rcback = 0; /* amount to back off of rcfirst */ 168 int firstmsg = 0, nextmsg = 0, lastmsg = 0; 169 int blast = 0; 170 struct stat buf; /* stat to check access of bounds */ 171 FILE *bounds; 172 char *cp; 173 174 #ifdef UNBUFFERED 175 setbuf(stdout, NULL); 176 #endif 177 setlocale(LC_ALL, ""); 178 179 time(&t); 180 if (setuid(uid = getuid()) != 0) 181 err(1, "setuid failed"); 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 errx(1, 204 "only the super-user can use the c flag"); 205 clean = YES; 206 break; 207 208 case 'f': /* silently */ 209 hush = YES; 210 break; 211 212 case 'h': /* headers only */ 213 hdrs = YES; 214 break; 215 216 case 'l': /* local msgs only */ 217 locomode = YES; 218 break; 219 220 case 'o': /* option to save last message */ 221 lastcmd = YES; 222 break; 223 224 case 'p': /* pipe thru 'more' during long msgs */ 225 use_pager = YES; 226 break; 227 228 case 'q': /* query only */ 229 qopt = YES; 230 break; 231 232 case 's': /* sending TO msgs */ 233 send_msg = YES; 234 break; 235 236 default: 237 usage(); 238 } 239 } 240 argc--, argv++; 241 } 242 243 /* 244 * determine current message bounds 245 */ 246 snprintf(fname, sizeof(fname), "%s/%s", _PATH_MSGS, BOUNDS); 247 248 /* 249 * Test access rights to the bounds file 250 * This can be a little tricky. if(send_msg), then 251 * we will create it. We assume that if(send_msg), 252 * then you have write permission there. 253 * Else, it better be there, or we bail. 254 */ 255 if (send_msg != YES) { 256 if (stat(fname, &buf) < 0) { 257 if (hush != YES) { 258 err(errno, "%s", fname); 259 } else { 260 exit(1); 261 } 262 } 263 } 264 bounds = fopen(fname, "r"); 265 266 if (bounds != NULL) { 267 fscanf(bounds, "%d %d\n", &firstmsg, &lastmsg); 268 fclose(bounds); 269 blast = lastmsg; /* save upper bound */ 270 } 271 272 if (clean) 273 keep = t - (rcback? rcback : NDAYS) DAYS; 274 275 if (clean || bounds == NULL) { /* relocate message bounds */ 276 struct dirent *dp; 277 struct stat stbuf; 278 bool seenany = NO; 279 DIR *dirp; 280 281 dirp = opendir(_PATH_MSGS); 282 if (dirp == NULL) 283 err(errno, "%s", _PATH_MSGS); 284 285 firstmsg = 32767; 286 lastmsg = 0; 287 288 for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)){ 289 cp = dp->d_name; 290 int i = 0; 291 292 if (dp->d_ino == 0) 293 continue; 294 if (dp->d_namlen == 0) 295 continue; 296 297 if (clean) 298 snprintf(inbuf, sizeof(inbuf), "%s/%s", _PATH_MSGS, cp); 299 300 while (isdigit(*cp)) 301 i = i * 10 + *cp++ - '0'; 302 if (*cp) 303 continue; /* not a message! */ 304 305 if (clean) { 306 if (stat(inbuf, &stbuf) != 0) 307 continue; 308 if (stbuf.st_mtime < keep 309 && stbuf.st_mode&S_IWRITE) { 310 unlink(inbuf); 311 continue; 312 } 313 } 314 315 if (i > lastmsg) 316 lastmsg = i; 317 if (i < firstmsg) 318 firstmsg = i; 319 seenany = YES; 320 } 321 closedir(dirp); 322 323 if (!seenany) { 324 if (blast != 0) /* never lower the upper bound! */ 325 lastmsg = blast; 326 firstmsg = lastmsg + 1; 327 } 328 else if (blast > lastmsg) 329 lastmsg = blast; 330 331 if (!send_msg) { 332 bounds = fopen(fname, "w"); 333 if (bounds == NULL) 334 err(errno, "%s", fname); 335 chmod(fname, CMODE); 336 fprintf(bounds, "%d %d\n", firstmsg, lastmsg); 337 fclose(bounds); 338 } 339 } 340 341 if (send_msg) { 342 /* 343 * Send mode - place msgs in _PATH_MSGS 344 */ 345 bounds = fopen(fname, "w"); 346 if (bounds == NULL) 347 err(errno, "%s", fname); 348 349 nextmsg = lastmsg + 1; 350 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, nextmsg); 351 newmsg = fopen(fname, "w"); 352 if (newmsg == NULL) 353 err(errno, "%s", fname); 354 chmod(fname, CMODE); 355 356 fprintf(bounds, "%d %d\n", firstmsg, nextmsg); 357 fclose(bounds); 358 359 sending = YES; 360 if (ruptible) 361 signal(SIGINT, onintr); 362 363 if (isatty(fileno(stdin))) { 364 ptr = getpwuid(uid)->pw_name; 365 printf("Message %d:\nFrom %s %sSubject: ", 366 nextmsg, ptr, ctime(&t)); 367 fflush(stdout); 368 fgets(inbuf, sizeof inbuf, stdin); 369 putchar('\n'); 370 fflush(stdout); 371 fprintf(newmsg, "From %s %sSubject: %s\n", 372 ptr, ctime(&t), inbuf); 373 blankline = seensubj = YES; 374 } 375 else 376 blankline = seensubj = NO; 377 for (;;) { 378 fgets(inbuf, sizeof inbuf, stdin); 379 if (feof(stdin) || ferror(stdin)) 380 break; 381 blankline = (blankline || (inbuf[0] == '\n')); 382 seensubj = (seensubj || (!blankline && (strncmp(inbuf, "Subj", 4) == 0))); 383 fputs(inbuf, newmsg); 384 } 385 #ifdef OBJECT 386 if (!seensubj) { 387 printf("NOTICE: Messages should have a Subject field!\n"); 388 #ifdef REJECT 389 unlink(fname); 390 #endif 391 exit(1); 392 } 393 #endif 394 exit(ferror(stdin)); 395 } 396 if (clean) 397 exit(0); 398 399 /* 400 * prepare to display messages 401 */ 402 totty = (isatty(fileno(stdout)) != 0); 403 use_pager = use_pager && totty; 404 405 if ((cp = getenv("HOME")) == NULL || *cp == '\0') { 406 fprintf(stderr, "Error, no home directory!\n"); 407 exit(1); 408 } 409 snprintf(fname, sizeof(fname), "%s/%s", cp, MSGSRC); 410 msgsrc = fopen(fname, "r"); 411 if (msgsrc) { 412 newrc = NO; 413 fscanf(msgsrc, "%d\n", &nextmsg); 414 fclose(msgsrc); 415 if (nextmsg > lastmsg+1) { 416 printf("Warning: bounds have been reset (%d, %d)\n", 417 firstmsg, lastmsg); 418 truncate(fname, (off_t)0); 419 newrc = YES; 420 } 421 else if (!rcfirst) 422 rcfirst = nextmsg - rcback; 423 } 424 else 425 newrc = YES; 426 msgsrc = fopen(fname, "r+"); 427 if (msgsrc == NULL) 428 msgsrc = fopen(fname, "w"); 429 if (msgsrc == NULL) 430 err(errno, "%s", fname); 431 if (rcfirst) { 432 if (rcfirst > lastmsg+1) { 433 printf("Warning: the last message is number %d.\n", 434 lastmsg); 435 rcfirst = nextmsg; 436 } 437 if (rcfirst > firstmsg) 438 firstmsg = rcfirst; /* don't set below first msg */ 439 } 440 if (newrc) { 441 nextmsg = firstmsg; 442 rewind(msgsrc); 443 fprintf(msgsrc, "%d\n", nextmsg); 444 fflush(msgsrc); 445 } 446 447 #ifdef V7 448 if (totty) { 449 struct winsize win; 450 if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1) 451 Lpp = win.ws_row; 452 if (Lpp <= 0) { 453 if (tgetent(inbuf, getenv("TERM")) <= 0 454 || (Lpp = tgetnum("li")) <= 0) { 455 Lpp = NLINES; 456 } 457 } 458 } 459 #endif 460 Lpp -= 6; /* for headers, etc. */ 461 462 already = NO; 463 prevmsg = firstmsg; 464 printing = YES; 465 if (ruptible) 466 signal(SIGINT, onintr); 467 468 /* 469 * Main program loop 470 */ 471 for (msg = firstmsg; msg <= lastmsg; msg++) { 472 473 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, msg); 474 newmsg = fopen(fname, "r"); 475 if (newmsg == NULL) 476 continue; 477 478 gfrsub(newmsg); /* get From and Subject fields */ 479 if (locomode && !local) { 480 fclose(newmsg); 481 continue; 482 } 483 484 if (qopt) { /* This has to be located here */ 485 printf("There are new messages.\n"); 486 exit(0); 487 } 488 489 if (already && !hdrs) 490 putchar('\n'); 491 492 /* 493 * Print header 494 */ 495 if (totty) 496 signal(SIGTSTP, onsusp); 497 (void) setjmp(tstpbuf); 498 already = YES; 499 nlines = 2; 500 if (seenfrom) { 501 printf("Message %d:\nFrom %s %s", msg, from, date); 502 nlines++; 503 } 504 if (seensubj) { 505 printf("Subject: %s", subj); 506 nlines++; 507 } 508 else { 509 if (seenfrom) { 510 putchar('\n'); 511 nlines++; 512 } 513 while (nlines < 6 514 && fgets(inbuf, sizeof inbuf, newmsg) 515 && inbuf[0] != '\n') { 516 fputs(inbuf, stdout); 517 nlines++; 518 } 519 } 520 521 lct = linecnt(newmsg); 522 if (lct) 523 printf("(%d%sline%s) ", lct, seensubj? " " : " more ", 524 (lct == 1) ? "" : "s"); 525 526 if (hdrs) { 527 printf("\n-----\n"); 528 fclose(newmsg); 529 continue; 530 } 531 532 /* 533 * Ask user for command 534 */ 535 if (totty) 536 ask(lct? MORE : (msg==lastmsg? NOMORE : NEXT)); 537 else 538 inbuf[0] = 'y'; 539 if (totty) 540 signal(SIGTSTP, SIG_DFL); 541 cmnd: 542 in = inbuf; 543 switch (*in) { 544 case 'x': 545 /* FALLTHROUGH */ 546 case 'X': 547 exit(0); 548 /* NOTREACHED */ 549 550 case 'q': 551 /* FALLTHROUGH */ 552 case 'Q': 553 quitit = YES; 554 printf("--Postponed--\n"); 555 exit(0); 556 /* NOTREACHED */ 557 558 case 'n': 559 /* FALLTHROUGH */ 560 case 'N': 561 if (msg >= nextmsg) sep = "Flushed"; 562 prevmsg = msg; 563 break; 564 565 case 'p': 566 /* FALLTHROUGH */ 567 case 'P': 568 use_pager = (*in++ == 'p'); 569 /* FALLTHROUGH */ 570 case '\n': 571 /* FALLTHROUGH */ 572 case 'y': 573 default: 574 if (*in == '-') { 575 msg = prevmsg-1; 576 sep = "replay"; 577 break; 578 } 579 if (isdigit(*in)) { 580 msg = next(in); 581 sep = in; 582 break; 583 } 584 585 prmesg(nlines + lct + (seensubj? 1 : 0)); 586 prevmsg = msg; 587 588 } 589 590 printf("--%s--\n", sep); 591 sep = "-"; 592 if (msg >= nextmsg) { 593 nextmsg = msg + 1; 594 rewind(msgsrc); 595 fprintf(msgsrc, "%d\n", nextmsg); 596 fflush(msgsrc); 597 } 598 if (newmsg) 599 fclose(newmsg); 600 if (quitit) 601 break; 602 } 603 604 /* 605 * Make sure .rc file gets updated 606 */ 607 if (--msg >= nextmsg) { 608 nextmsg = msg + 1; 609 rewind(msgsrc); 610 fprintf(msgsrc, "%d\n", nextmsg); 611 fflush(msgsrc); 612 } 613 if (already && !quitit && lastcmd && totty) { 614 /* 615 * save or reply to last message? 616 */ 617 msg = prevmsg; 618 ask(NOMORE); 619 if (inbuf[0] == '-' || isdigit(inbuf[0])) 620 goto cmnd; 621 } 622 if (!(already || hush || qopt)) 623 printf("No new messages.\n"); 624 exit(0); 625 /* NOTREACHED */ 626 } 627 628 static void 629 usage(void) 630 { 631 fprintf(stderr, "usage: msgs [fhlopq] [[-]number]\n"); 632 exit(1); 633 } 634 635 static void 636 prmesg(int length) 637 { 638 FILE *outf; 639 char *env_pager; 640 641 if (use_pager && length > Lpp) { 642 signal(SIGPIPE, SIG_IGN); 643 signal(SIGQUIT, SIG_IGN); 644 if ((env_pager = getenv("PAGER")) == NULL) { 645 snprintf(cmdbuf, sizeof(cmdbuf), _PATH_PAGER, Lpp); 646 } else { 647 snprintf(cmdbuf, sizeof(cmdbuf), "%s", env_pager); 648 } 649 outf = popen(cmdbuf, "w"); 650 if (!outf) 651 outf = stdout; 652 else 653 setbuf(outf, (char *)NULL); 654 } 655 else 656 outf = stdout; 657 658 if (seensubj) 659 putc('\n', outf); 660 661 while (fgets(inbuf, sizeof inbuf, newmsg)) { 662 fputs(inbuf, outf); 663 if (ferror(outf)) { 664 clearerr(outf); 665 break; 666 } 667 } 668 669 if (outf != stdout) { 670 pclose(outf); 671 signal(SIGPIPE, SIG_DFL); 672 signal(SIGQUIT, SIG_DFL); 673 } 674 else { 675 fflush(stdout); 676 } 677 678 /* force wait on output */ 679 tcdrain(fileno(stdout)); 680 } 681 682 static void 683 onintr(int unused __unused) 684 { 685 signal(SIGINT, onintr); 686 if (mailing) 687 unlink(fname); 688 if (sending) { 689 unlink(fname); 690 puts("--Killed--"); 691 exit(1); 692 } 693 if (printing) { 694 putchar('\n'); 695 if (hdrs) 696 exit(0); 697 sep = "Interrupt"; 698 if (newmsg) 699 fseeko(newmsg, (off_t)0, SEEK_END); 700 intrpflg = YES; 701 } 702 } 703 704 /* 705 * We have just gotten a susp. Suspend and prepare to resume. 706 */ 707 static void 708 onsusp(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 static int 719 linecnt(FILE *f) 720 { 721 off_t oldpos = ftello(f); 722 int l = 0; 723 char lbuf[BUFSIZ]; 724 725 while (fgets(lbuf, sizeof lbuf, f)) 726 l++; 727 clearerr(f); 728 fseeko(f, oldpos, SEEK_SET); 729 return (l); 730 } 731 732 static int 733 next(char *buf) 734 { 735 int i; 736 sscanf(buf, "%d", &i); 737 sprintf(buf, "Goto %d", i); 738 return(--i); 739 } 740 741 static void 742 ask(const char *prompt) 743 { 744 char inch; 745 int n, cmsg, fd; 746 off_t oldpos; 747 FILE *cpfrom, *cpto; 748 749 printf("%s ", prompt); 750 fflush(stdout); 751 intrpflg = NO; 752 (void) fgets(inbuf, sizeof inbuf, stdin); 753 if ((n = strlen(inbuf)) > 0 && inbuf[n - 1] == '\n') 754 inbuf[n - 1] = '\0'; 755 if (intrpflg) 756 inbuf[0] = 'x'; 757 758 /* 759 * Handle 'mail' and 'save' here. 760 */ 761 if ((inch = inbuf[0]) == 's' || inch == 'm') { 762 if (inbuf[1] == '-') 763 cmsg = prevmsg; 764 else if (isdigit(inbuf[1])) 765 cmsg = atoi(&inbuf[1]); 766 else 767 cmsg = msg; 768 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, cmsg); 769 770 oldpos = ftello(newmsg); 771 772 cpfrom = fopen(fname, "r"); 773 if (!cpfrom) { 774 printf("Message %d not found\n", cmsg); 775 ask (prompt); 776 return; 777 } 778 779 if (inch == 's') { 780 in = nxtfld(inbuf); 781 if (*in) { 782 for (n=0; in[n] > ' '; n++) { /* sizeof fname? */ 783 fname[n] = in[n]; 784 } 785 fname[n] = '\0'; 786 } 787 else 788 strcpy(fname, "Messages"); 789 fd = open(fname, O_RDWR|O_EXCL|O_CREAT|O_APPEND); 790 } 791 else { 792 strcpy(fname, _PATH_TMP); 793 fd = mkstemp(fname); 794 if (fd != -1) { 795 snprintf(cmdbuf, sizeof(cmdbuf), _PATH_MAIL, 796 fname); 797 mailing = YES; 798 } 799 } 800 if (fd == -1 || (cpto = fdopen(fd, "a")) == NULL) { 801 if (fd != -1) 802 close(fd); 803 warn("%s", fname); 804 mailing = NO; 805 fseeko(newmsg, oldpos, SEEK_SET); 806 ask(prompt); 807 fclose(cpfrom); 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 strlcpy(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 strlcpy(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 strlcpy(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