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 #endif 40 41 #include <sys/cdefs.h> 42 /* 43 * msgs - a user bulletin board program 44 * 45 * usage: 46 * msgs [fhlopq] [[-]number] to read messages 47 * msgs -s to place messages 48 * msgs -c [-days] to clean up the bulletin board 49 * 50 * prompt commands are: 51 * y print message 52 * n flush message, go to next message 53 * q flush message, quit 54 * p print message, turn on 'pipe thru more' mode 55 * P print message, turn off 'pipe thru more' mode 56 * - reprint last message 57 * s[-][<num>] [<filename>] save message 58 * m[-][<num>] mail with message in temp mbox 59 * x exit without flushing this message 60 * <num> print message number <num> 61 */ 62 63 #define V7 /* will look for TERM in the environment */ 64 #define OBJECT /* will object to messages without Subjects */ 65 /* #define REJECT */ /* will reject messages without Subjects 66 (OBJECT must be defined also) */ 67 /* #define UNBUFFERED *//* use unbuffered output */ 68 69 #include <sys/param.h> 70 #include <sys/stat.h> 71 #include <ctype.h> 72 #include <dirent.h> 73 #include <err.h> 74 #include <errno.h> 75 #include <fcntl.h> 76 #include <locale.h> 77 #include <pwd.h> 78 #include <setjmp.h> 79 #include <termcap.h> 80 #include <termios.h> 81 #include <signal.h> 82 #include <stdio.h> 83 #include <stdlib.h> 84 #include <string.h> 85 #include <time.h> 86 #include <unistd.h> 87 #include "pathnames.h" 88 89 #define CMODE 0644 /* bounds file creation mode */ 90 #define NO 0 91 #define YES 1 92 #define SUPERUSER 0 /* superuser uid */ 93 #define DAEMON 1 /* daemon uid */ 94 #define NLINES 24 /* default number of lines/crt screen */ 95 #define NDAYS 21 /* default keep time for messages */ 96 #define DAYS *24*60*60 /* seconds/day */ 97 #define MSGSRC ".msgsrc" /* user's rc file */ 98 #define BOUNDS "bounds" /* message bounds file */ 99 #define NEXT "Next message? [yq]" 100 #define MORE "More? [ynq]" 101 #define NOMORE "(No more) [q] ?" 102 103 typedef char bool; 104 105 static FILE *msgsrc; 106 static FILE *newmsg; 107 static const char *sep = "-"; 108 static char inbuf[BUFSIZ]; 109 static char fname[MAXPATHLEN]; 110 static char cmdbuf[MAXPATHLEN + MAXPATHLEN]; 111 static char subj[128]; 112 static char from[128]; 113 static char date[128]; 114 static char *ptr; 115 static char *in; 116 static bool local; 117 static bool ruptible; 118 static bool totty; 119 static bool seenfrom; 120 static bool seensubj; 121 static bool blankline; 122 static bool printing = NO; 123 static bool mailing = NO; 124 static bool quitit = NO; 125 static bool sending = NO; 126 static bool intrpflg = NO; 127 static uid_t uid; 128 static int msg; 129 static int prevmsg; 130 static int lct; 131 static int nlines; 132 static int Lpp = 0; 133 static time_t t; 134 static time_t keep; 135 136 /* option initialization */ 137 static bool hdrs = NO; 138 static bool qopt = NO; 139 static bool hush = NO; 140 static bool send_msg = NO; 141 static bool locomode = NO; 142 static bool use_pager = NO; 143 static bool clean = NO; 144 static bool lastcmd = NO; 145 static jmp_buf tstpbuf; 146 147 static void ask(const char *); 148 static void gfrsub(FILE *); 149 static int linecnt(FILE *); 150 static int next(char *); 151 static char *nxtfld(char *); 152 static void onsusp(int); 153 static void onintr(int); 154 static void prmesg(int); 155 static void usage(void); 156 157 int 158 main(int argc, char *argv[]) 159 { 160 bool newrc, already; 161 int rcfirst = 0; /* first message to print (from .rc) */ 162 int rcback = 0; /* amount to back off of rcfirst */ 163 int firstmsg = 0, nextmsg = 0, lastmsg = 0; 164 int blast = 0; 165 struct stat buf; /* stat to check access of bounds */ 166 FILE *bounds; 167 char *cp; 168 169 #ifdef UNBUFFERED 170 setbuf(stdout, NULL); 171 #endif 172 setlocale(LC_ALL, ""); 173 174 time(&t); 175 if (setuid(uid = getuid()) != 0) 176 err(1, "setuid failed"); 177 ruptible = (signal(SIGINT, SIG_IGN) == SIG_DFL); 178 if (ruptible) 179 signal(SIGINT, SIG_DFL); 180 181 argc--, argv++; 182 while (argc > 0) { 183 if (isdigit(argv[0][0])) { /* starting message # */ 184 rcfirst = atoi(argv[0]); 185 } 186 else if (isdigit(argv[0][1])) { /* backward offset */ 187 rcback = atoi( &( argv[0][1] ) ); 188 } 189 else { 190 ptr = *argv; 191 while (*ptr) switch (*ptr++) { 192 193 case '-': 194 break; 195 196 case 'c': 197 if (uid != SUPERUSER && uid != DAEMON) 198 errx(1, 199 "only the super-user can use the c flag"); 200 clean = YES; 201 break; 202 203 case 'f': /* silently */ 204 hush = YES; 205 break; 206 207 case 'h': /* headers only */ 208 hdrs = YES; 209 break; 210 211 case 'l': /* local msgs only */ 212 locomode = YES; 213 break; 214 215 case 'o': /* option to save last message */ 216 lastcmd = YES; 217 break; 218 219 case 'p': /* pipe thru 'more' during long msgs */ 220 use_pager = YES; 221 break; 222 223 case 'q': /* query only */ 224 qopt = YES; 225 break; 226 227 case 's': /* sending TO msgs */ 228 send_msg = YES; 229 break; 230 231 default: 232 usage(); 233 } 234 } 235 argc--, argv++; 236 } 237 238 /* 239 * determine current message bounds 240 */ 241 snprintf(fname, sizeof(fname), "%s/%s", _PATH_MSGS, BOUNDS); 242 243 /* 244 * Test access rights to the bounds file 245 * This can be a little tricky. if(send_msg), then 246 * we will create it. We assume that if(send_msg), 247 * then you have write permission there. 248 * Else, it better be there, or we bail. 249 */ 250 if (send_msg != YES) { 251 if (stat(fname, &buf) < 0) { 252 if (hush != YES) { 253 err(errno, "%s", fname); 254 } else { 255 exit(1); 256 } 257 } 258 } 259 bounds = fopen(fname, "r"); 260 261 if (bounds != NULL) { 262 fscanf(bounds, "%d %d\n", &firstmsg, &lastmsg); 263 fclose(bounds); 264 blast = lastmsg; /* save upper bound */ 265 } 266 267 if (clean) 268 keep = t - (rcback? rcback : NDAYS) DAYS; 269 270 if (clean || bounds == NULL) { /* relocate message bounds */ 271 struct dirent *dp; 272 struct stat stbuf; 273 bool seenany = NO; 274 DIR *dirp; 275 276 dirp = opendir(_PATH_MSGS); 277 if (dirp == NULL) 278 err(errno, "%s", _PATH_MSGS); 279 280 firstmsg = 32767; 281 lastmsg = 0; 282 283 for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)){ 284 cp = dp->d_name; 285 int i = 0; 286 287 if (dp->d_ino == 0) 288 continue; 289 if (dp->d_namlen == 0) 290 continue; 291 292 if (clean) 293 snprintf(inbuf, sizeof(inbuf), "%s/%s", _PATH_MSGS, cp); 294 295 while (isdigit(*cp)) 296 i = i * 10 + *cp++ - '0'; 297 if (*cp) 298 continue; /* not a message! */ 299 300 if (clean) { 301 if (stat(inbuf, &stbuf) != 0) 302 continue; 303 if (stbuf.st_mtime < keep 304 && stbuf.st_mode&S_IWRITE) { 305 unlink(inbuf); 306 continue; 307 } 308 } 309 310 if (i > lastmsg) 311 lastmsg = i; 312 if (i < firstmsg) 313 firstmsg = i; 314 seenany = YES; 315 } 316 closedir(dirp); 317 318 if (!seenany) { 319 if (blast != 0) /* never lower the upper bound! */ 320 lastmsg = blast; 321 firstmsg = lastmsg + 1; 322 } 323 else if (blast > lastmsg) 324 lastmsg = blast; 325 326 if (!send_msg) { 327 bounds = fopen(fname, "w"); 328 if (bounds == NULL) 329 err(errno, "%s", fname); 330 chmod(fname, CMODE); 331 fprintf(bounds, "%d %d\n", firstmsg, lastmsg); 332 fclose(bounds); 333 } 334 } 335 336 if (send_msg) { 337 /* 338 * Send mode - place msgs in _PATH_MSGS 339 */ 340 bounds = fopen(fname, "w"); 341 if (bounds == NULL) 342 err(errno, "%s", fname); 343 344 nextmsg = lastmsg + 1; 345 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, nextmsg); 346 newmsg = fopen(fname, "w"); 347 if (newmsg == NULL) 348 err(errno, "%s", fname); 349 chmod(fname, CMODE); 350 351 fprintf(bounds, "%d %d\n", firstmsg, nextmsg); 352 fclose(bounds); 353 354 sending = YES; 355 if (ruptible) 356 signal(SIGINT, onintr); 357 358 if (isatty(fileno(stdin))) { 359 ptr = getpwuid(uid)->pw_name; 360 printf("Message %d:\nFrom %s %sSubject: ", 361 nextmsg, ptr, ctime(&t)); 362 fflush(stdout); 363 fgets(inbuf, sizeof inbuf, stdin); 364 putchar('\n'); 365 fflush(stdout); 366 fprintf(newmsg, "From %s %sSubject: %s\n", 367 ptr, ctime(&t), inbuf); 368 blankline = seensubj = YES; 369 } 370 else 371 blankline = seensubj = NO; 372 for (;;) { 373 fgets(inbuf, sizeof inbuf, stdin); 374 if (feof(stdin) || ferror(stdin)) 375 break; 376 blankline = (blankline || (inbuf[0] == '\n')); 377 seensubj = (seensubj || (!blankline && (strncmp(inbuf, "Subj", 4) == 0))); 378 fputs(inbuf, newmsg); 379 } 380 #ifdef OBJECT 381 if (!seensubj) { 382 printf("NOTICE: Messages should have a Subject field!\n"); 383 #ifdef REJECT 384 unlink(fname); 385 #endif 386 exit(1); 387 } 388 #endif 389 exit(ferror(stdin)); 390 } 391 if (clean) 392 exit(0); 393 394 /* 395 * prepare to display messages 396 */ 397 totty = (isatty(fileno(stdout)) != 0); 398 use_pager = use_pager && totty; 399 400 if ((cp = getenv("HOME")) == NULL || *cp == '\0') { 401 fprintf(stderr, "Error, no home directory!\n"); 402 exit(1); 403 } 404 snprintf(fname, sizeof(fname), "%s/%s", cp, MSGSRC); 405 msgsrc = fopen(fname, "r"); 406 if (msgsrc) { 407 newrc = NO; 408 fscanf(msgsrc, "%d\n", &nextmsg); 409 fclose(msgsrc); 410 if (nextmsg > lastmsg+1) { 411 printf("Warning: bounds have been reset (%d, %d)\n", 412 firstmsg, lastmsg); 413 truncate(fname, (off_t)0); 414 newrc = YES; 415 } 416 else if (!rcfirst) 417 rcfirst = nextmsg - rcback; 418 } 419 else 420 newrc = YES; 421 msgsrc = fopen(fname, "r+"); 422 if (msgsrc == NULL) 423 msgsrc = fopen(fname, "w"); 424 if (msgsrc == NULL) 425 err(errno, "%s", fname); 426 if (rcfirst) { 427 if (rcfirst > lastmsg+1) { 428 printf("Warning: the last message is number %d.\n", 429 lastmsg); 430 rcfirst = nextmsg; 431 } 432 if (rcfirst > firstmsg) 433 firstmsg = rcfirst; /* don't set below first msg */ 434 } 435 if (newrc) { 436 nextmsg = firstmsg; 437 rewind(msgsrc); 438 fprintf(msgsrc, "%d\n", nextmsg); 439 fflush(msgsrc); 440 } 441 442 #ifdef V7 443 if (totty) { 444 struct winsize win; 445 if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1) 446 Lpp = win.ws_row; 447 if (Lpp <= 0) { 448 if (tgetent(inbuf, getenv("TERM")) <= 0 449 || (Lpp = tgetnum("li")) <= 0) { 450 Lpp = NLINES; 451 } 452 } 453 } 454 #endif 455 Lpp -= 6; /* for headers, etc. */ 456 457 already = NO; 458 prevmsg = firstmsg; 459 printing = YES; 460 if (ruptible) 461 signal(SIGINT, onintr); 462 463 /* 464 * Main program loop 465 */ 466 for (msg = firstmsg; msg <= lastmsg; msg++) { 467 468 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, msg); 469 newmsg = fopen(fname, "r"); 470 if (newmsg == NULL) 471 continue; 472 473 gfrsub(newmsg); /* get From and Subject fields */ 474 if (locomode && !local) { 475 fclose(newmsg); 476 continue; 477 } 478 479 if (qopt) { /* This has to be located here */ 480 printf("There are new messages.\n"); 481 exit(0); 482 } 483 484 if (already && !hdrs) 485 putchar('\n'); 486 487 /* 488 * Print header 489 */ 490 if (totty) 491 signal(SIGTSTP, onsusp); 492 (void) setjmp(tstpbuf); 493 already = YES; 494 nlines = 2; 495 if (seenfrom) { 496 printf("Message %d:\nFrom %s %s", msg, from, date); 497 nlines++; 498 } 499 if (seensubj) { 500 printf("Subject: %s", subj); 501 nlines++; 502 } 503 else { 504 if (seenfrom) { 505 putchar('\n'); 506 nlines++; 507 } 508 while (nlines < 6 509 && fgets(inbuf, sizeof inbuf, newmsg) 510 && inbuf[0] != '\n') { 511 fputs(inbuf, stdout); 512 nlines++; 513 } 514 } 515 516 lct = linecnt(newmsg); 517 if (lct) 518 printf("(%d%sline%s) ", lct, seensubj? " " : " more ", 519 (lct == 1) ? "" : "s"); 520 521 if (hdrs) { 522 printf("\n-----\n"); 523 fclose(newmsg); 524 continue; 525 } 526 527 /* 528 * Ask user for command 529 */ 530 if (totty) 531 ask(lct? MORE : (msg==lastmsg? NOMORE : NEXT)); 532 else 533 inbuf[0] = 'y'; 534 if (totty) 535 signal(SIGTSTP, SIG_DFL); 536 cmnd: 537 in = inbuf; 538 switch (*in) { 539 case 'x': 540 /* FALLTHROUGH */ 541 case 'X': 542 exit(0); 543 /* NOTREACHED */ 544 545 case 'q': 546 /* FALLTHROUGH */ 547 case 'Q': 548 quitit = YES; 549 printf("--Postponed--\n"); 550 exit(0); 551 /* NOTREACHED */ 552 553 case 'n': 554 /* FALLTHROUGH */ 555 case 'N': 556 if (msg >= nextmsg) sep = "Flushed"; 557 prevmsg = msg; 558 break; 559 560 case 'p': 561 /* FALLTHROUGH */ 562 case 'P': 563 use_pager = (*in++ == 'p'); 564 /* FALLTHROUGH */ 565 case '\n': 566 /* FALLTHROUGH */ 567 case 'y': 568 default: 569 if (*in == '-') { 570 msg = prevmsg-1; 571 sep = "replay"; 572 break; 573 } 574 if (isdigit(*in)) { 575 msg = next(in); 576 sep = in; 577 break; 578 } 579 580 prmesg(nlines + lct + (seensubj? 1 : 0)); 581 prevmsg = msg; 582 583 } 584 585 printf("--%s--\n", sep); 586 sep = "-"; 587 if (msg >= nextmsg) { 588 nextmsg = msg + 1; 589 rewind(msgsrc); 590 fprintf(msgsrc, "%d\n", nextmsg); 591 fflush(msgsrc); 592 } 593 if (newmsg) 594 fclose(newmsg); 595 if (quitit) 596 break; 597 } 598 599 /* 600 * Make sure .rc file gets updated 601 */ 602 if (--msg >= nextmsg) { 603 nextmsg = msg + 1; 604 rewind(msgsrc); 605 fprintf(msgsrc, "%d\n", nextmsg); 606 fflush(msgsrc); 607 } 608 if (already && !quitit && lastcmd && totty) { 609 /* 610 * save or reply to last message? 611 */ 612 msg = prevmsg; 613 ask(NOMORE); 614 if (inbuf[0] == '-' || isdigit(inbuf[0])) 615 goto cmnd; 616 } 617 if (!(already || hush || qopt)) 618 printf("No new messages.\n"); 619 exit(0); 620 /* NOTREACHED */ 621 } 622 623 static void 624 usage(void) 625 { 626 fprintf(stderr, "usage: msgs [fhlopq] [[-]number]\n"); 627 exit(1); 628 } 629 630 static void 631 prmesg(int length) 632 { 633 FILE *outf; 634 char *env_pager; 635 636 if (use_pager && length > Lpp) { 637 signal(SIGPIPE, SIG_IGN); 638 signal(SIGQUIT, SIG_IGN); 639 if ((env_pager = getenv("PAGER")) == NULL) { 640 snprintf(cmdbuf, sizeof(cmdbuf), _PATH_PAGER, Lpp); 641 } else { 642 snprintf(cmdbuf, sizeof(cmdbuf), "%s", env_pager); 643 } 644 outf = popen(cmdbuf, "w"); 645 if (!outf) 646 outf = stdout; 647 else 648 setbuf(outf, (char *)NULL); 649 } 650 else 651 outf = stdout; 652 653 if (seensubj) 654 putc('\n', outf); 655 656 while (fgets(inbuf, sizeof inbuf, newmsg)) { 657 fputs(inbuf, outf); 658 if (ferror(outf)) { 659 clearerr(outf); 660 break; 661 } 662 } 663 664 if (outf != stdout) { 665 pclose(outf); 666 signal(SIGPIPE, SIG_DFL); 667 signal(SIGQUIT, SIG_DFL); 668 } 669 else { 670 fflush(stdout); 671 } 672 673 /* force wait on output */ 674 tcdrain(fileno(stdout)); 675 } 676 677 static void 678 onintr(int unused __unused) 679 { 680 signal(SIGINT, onintr); 681 if (mailing) 682 unlink(fname); 683 if (sending) { 684 unlink(fname); 685 puts("--Killed--"); 686 exit(1); 687 } 688 if (printing) { 689 putchar('\n'); 690 if (hdrs) 691 exit(0); 692 sep = "Interrupt"; 693 if (newmsg) 694 fseeko(newmsg, (off_t)0, SEEK_END); 695 intrpflg = YES; 696 } 697 } 698 699 /* 700 * We have just gotten a susp. Suspend and prepare to resume. 701 */ 702 static void 703 onsusp(int unused __unused) 704 { 705 signal(SIGTSTP, SIG_DFL); 706 sigsetmask(0); 707 kill(0, SIGTSTP); 708 signal(SIGTSTP, onsusp); 709 if (!mailing) 710 longjmp(tstpbuf, 0); 711 } 712 713 static int 714 linecnt(FILE *f) 715 { 716 off_t oldpos = ftello(f); 717 int l = 0; 718 char lbuf[BUFSIZ]; 719 720 while (fgets(lbuf, sizeof lbuf, f)) 721 l++; 722 clearerr(f); 723 fseeko(f, oldpos, SEEK_SET); 724 return (l); 725 } 726 727 static int 728 next(char *buf) 729 { 730 int i; 731 sscanf(buf, "%d", &i); 732 sprintf(buf, "Goto %d", i); 733 return(--i); 734 } 735 736 static void 737 ask(const char *prompt) 738 { 739 char inch; 740 int n, cmsg, fd; 741 off_t oldpos; 742 FILE *cpfrom, *cpto; 743 744 printf("%s ", prompt); 745 fflush(stdout); 746 intrpflg = NO; 747 (void) fgets(inbuf, sizeof inbuf, stdin); 748 if ((n = strlen(inbuf)) > 0 && inbuf[n - 1] == '\n') 749 inbuf[n - 1] = '\0'; 750 if (intrpflg) 751 inbuf[0] = 'x'; 752 753 /* 754 * Handle 'mail' and 'save' here. 755 */ 756 if ((inch = inbuf[0]) == 's' || inch == 'm') { 757 if (inbuf[1] == '-') 758 cmsg = prevmsg; 759 else if (isdigit(inbuf[1])) 760 cmsg = atoi(&inbuf[1]); 761 else 762 cmsg = msg; 763 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, cmsg); 764 765 oldpos = ftello(newmsg); 766 767 cpfrom = fopen(fname, "r"); 768 if (!cpfrom) { 769 printf("Message %d not found\n", cmsg); 770 ask (prompt); 771 return; 772 } 773 774 if (inch == 's') { 775 in = nxtfld(inbuf); 776 if (*in) { 777 for (n=0; in[n] > ' '; n++) { /* sizeof fname? */ 778 fname[n] = in[n]; 779 } 780 fname[n] = '\0'; 781 } 782 else 783 strcpy(fname, "Messages"); 784 fd = open(fname, O_RDWR|O_EXCL|O_CREAT|O_APPEND); 785 } 786 else { 787 strcpy(fname, _PATH_TMP); 788 fd = mkstemp(fname); 789 if (fd != -1) { 790 snprintf(cmdbuf, sizeof(cmdbuf), _PATH_MAIL, 791 fname); 792 mailing = YES; 793 } 794 } 795 if (fd == -1 || (cpto = fdopen(fd, "a")) == NULL) { 796 if (fd != -1) 797 close(fd); 798 warn("%s", fname); 799 mailing = NO; 800 fseeko(newmsg, oldpos, SEEK_SET); 801 ask(prompt); 802 fclose(cpfrom); 803 return; 804 } 805 806 while ((n = fread(inbuf, 1, sizeof inbuf, cpfrom))) 807 fwrite(inbuf, 1, n, cpto); 808 809 fclose(cpfrom); 810 fclose(cpto); 811 fseeko(newmsg, oldpos, SEEK_SET);/* reposition current message */ 812 if (inch == 's') 813 printf("Message %d saved in \"%s\"\n", cmsg, fname); 814 else { 815 system(cmdbuf); 816 unlink(fname); 817 mailing = NO; 818 } 819 ask(prompt); 820 } 821 } 822 823 static void 824 gfrsub(FILE *infile) 825 { 826 off_t frompos; 827 int count; 828 829 seensubj = seenfrom = NO; 830 local = YES; 831 subj[0] = from[0] = date[0] = '\0'; 832 833 /* 834 * Is this a normal message? 835 */ 836 if (fgets(inbuf, sizeof inbuf, infile)) { 837 if (strncmp(inbuf, "From", 4)==0) { 838 /* 839 * expected form starts with From 840 */ 841 seenfrom = YES; 842 frompos = ftello(infile); 843 ptr = from; 844 in = nxtfld(inbuf); 845 if (*in) { 846 count = sizeof(from) - 1; 847 while (*in && *in > ' ' && count-- > 0) { 848 if (*in == ':' || *in == '@' || 849 *in == '!') 850 local = NO; 851 *ptr++ = *in++; 852 } 853 } 854 *ptr = '\0'; 855 if (*(in = nxtfld(in))) 856 strlcpy(date, in, sizeof date); 857 else { 858 date[0] = '\n'; 859 date[1] = '\0'; 860 } 861 } 862 else { 863 /* 864 * not the expected form 865 */ 866 rewind(infile); 867 return; 868 } 869 } 870 else 871 /* 872 * empty file ? 873 */ 874 return; 875 876 /* 877 * look for Subject line until EOF or a blank line 878 */ 879 while (fgets(inbuf, sizeof inbuf, infile) 880 && !(blankline = (inbuf[0] == '\n'))) { 881 /* 882 * extract Subject line 883 */ 884 if (!seensubj && strncmp(inbuf, "Subj", 4)==0) { 885 seensubj = YES; 886 frompos = ftello(infile); 887 strlcpy(subj, nxtfld(inbuf), sizeof subj); 888 } 889 } 890 if (!blankline) 891 /* 892 * ran into EOF 893 */ 894 fseeko(infile, frompos, SEEK_SET); 895 896 if (!seensubj) 897 /* 898 * for possible use with Mail 899 */ 900 strlcpy(subj, "(No Subject)\n", sizeof subj); 901 } 902 903 static char * 904 nxtfld(char *s) 905 { 906 if (*s) while (*s && !isspace(*s)) s++; /* skip over this field */ 907 if (*s) while (*s && isspace(*s)) s++; /* find start of next field */ 908 return (s); 909 } 910