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 /* 33 * msgs - a user bulletin board program 34 * 35 * usage: 36 * msgs [fhlopq] [[-]number] to read messages 37 * msgs -s to place messages 38 * msgs -c [-days] to clean up the bulletin board 39 * 40 * prompt commands are: 41 * y print message 42 * n flush message, go to next message 43 * q flush message, quit 44 * p print message, turn on 'pipe thru more' mode 45 * P print message, turn off 'pipe thru more' mode 46 * - reprint last message 47 * s[-][<num>] [<filename>] save message 48 * m[-][<num>] mail with message in temp mbox 49 * x exit without flushing this message 50 * <num> print message number <num> 51 */ 52 53 #define V7 /* will look for TERM in the environment */ 54 #define OBJECT /* will object to messages without Subjects */ 55 /* #define REJECT */ /* will reject messages without Subjects 56 (OBJECT must be defined also) */ 57 /* #define UNBUFFERED *//* use unbuffered output */ 58 59 #include <sys/param.h> 60 #include <sys/stat.h> 61 #include <ctype.h> 62 #include <dirent.h> 63 #include <err.h> 64 #include <errno.h> 65 #include <fcntl.h> 66 #include <locale.h> 67 #include <pwd.h> 68 #include <setjmp.h> 69 #include <termcap.h> 70 #include <termios.h> 71 #include <signal.h> 72 #include <stdio.h> 73 #include <stdlib.h> 74 #include <string.h> 75 #include <time.h> 76 #include <unistd.h> 77 #include "pathnames.h" 78 79 #define CMODE 0644 /* bounds file creation mode */ 80 #define NO 0 81 #define YES 1 82 #define SUPERUSER 0 /* superuser uid */ 83 #define DAEMON 1 /* daemon uid */ 84 #define NLINES 24 /* default number of lines/crt screen */ 85 #define NDAYS 21 /* default keep time for messages */ 86 #define DAYS *24*60*60 /* seconds/day */ 87 #define MSGSRC ".msgsrc" /* user's rc file */ 88 #define BOUNDS "bounds" /* message bounds file */ 89 #define NEXT "Next message? [yq]" 90 #define MORE "More? [ynq]" 91 #define NOMORE "(No more) [q] ?" 92 93 typedef char bool; 94 95 static FILE *msgsrc; 96 static FILE *newmsg; 97 static const char *sep = "-"; 98 static char inbuf[BUFSIZ]; 99 static char fname[MAXPATHLEN]; 100 static char cmdbuf[MAXPATHLEN + MAXPATHLEN]; 101 static char subj[128]; 102 static char from[128]; 103 static char date[128]; 104 static char *ptr; 105 static char *in; 106 static bool local; 107 static bool ruptible; 108 static bool totty; 109 static bool seenfrom; 110 static bool seensubj; 111 static bool blankline; 112 static bool printing = NO; 113 static bool mailing = NO; 114 static bool quitit = NO; 115 static bool sending = NO; 116 static bool intrpflg = NO; 117 static uid_t uid; 118 static int msg; 119 static int prevmsg; 120 static int lct; 121 static int nlines; 122 static int Lpp = 0; 123 static time_t t; 124 static time_t keep; 125 126 /* option initialization */ 127 static bool hdrs = NO; 128 static bool qopt = NO; 129 static bool hush = NO; 130 static bool send_msg = NO; 131 static bool locomode = NO; 132 static bool use_pager = NO; 133 static bool clean = NO; 134 static bool lastcmd = NO; 135 static jmp_buf tstpbuf; 136 137 static void ask(const char *); 138 static void gfrsub(FILE *); 139 static int linecnt(FILE *); 140 static int next(char *); 141 static char *nxtfld(char *); 142 static void onsusp(int); 143 static void onintr(int); 144 static void prmesg(int); 145 static void usage(void); 146 147 int 148 main(int argc, char *argv[]) 149 { 150 bool newrc, already; 151 int rcfirst = 0; /* first message to print (from .rc) */ 152 int rcback = 0; /* amount to back off of rcfirst */ 153 int firstmsg = 0, nextmsg = 0, lastmsg = 0; 154 int blast = 0; 155 struct stat buf; /* stat to check access of bounds */ 156 FILE *bounds; 157 char *cp; 158 159 #ifdef UNBUFFERED 160 setbuf(stdout, NULL); 161 #endif 162 setlocale(LC_ALL, ""); 163 164 time(&t); 165 if (setuid(uid = getuid()) != 0) 166 err(1, "setuid failed"); 167 ruptible = (signal(SIGINT, SIG_IGN) == SIG_DFL); 168 if (ruptible) 169 signal(SIGINT, SIG_DFL); 170 171 argc--, argv++; 172 while (argc > 0) { 173 if (isdigit(argv[0][0])) { /* starting message # */ 174 rcfirst = atoi(argv[0]); 175 } 176 else if (isdigit(argv[0][1])) { /* backward offset */ 177 rcback = atoi( &( argv[0][1] ) ); 178 } 179 else { 180 ptr = *argv; 181 while (*ptr) switch (*ptr++) { 182 183 case '-': 184 break; 185 186 case 'c': 187 if (uid != SUPERUSER && uid != DAEMON) 188 errx(1, 189 "only the super-user can use the c flag"); 190 clean = YES; 191 break; 192 193 case 'f': /* silently */ 194 hush = YES; 195 break; 196 197 case 'h': /* headers only */ 198 hdrs = YES; 199 break; 200 201 case 'l': /* local msgs only */ 202 locomode = YES; 203 break; 204 205 case 'o': /* option to save last message */ 206 lastcmd = YES; 207 break; 208 209 case 'p': /* pipe thru 'more' during long msgs */ 210 use_pager = YES; 211 break; 212 213 case 'q': /* query only */ 214 qopt = YES; 215 break; 216 217 case 's': /* sending TO msgs */ 218 send_msg = YES; 219 break; 220 221 default: 222 usage(); 223 } 224 } 225 argc--, argv++; 226 } 227 228 /* 229 * determine current message bounds 230 */ 231 snprintf(fname, sizeof(fname), "%s/%s", _PATH_MSGS, BOUNDS); 232 233 /* 234 * Test access rights to the bounds file 235 * This can be a little tricky. if(send_msg), then 236 * we will create it. We assume that if(send_msg), 237 * then you have write permission there. 238 * Else, it better be there, or we bail. 239 */ 240 if (send_msg != YES) { 241 if (stat(fname, &buf) < 0) { 242 if (hush != YES) { 243 err(errno, "%s", fname); 244 } else { 245 exit(1); 246 } 247 } 248 } 249 bounds = fopen(fname, "r"); 250 251 if (bounds != NULL) { 252 fscanf(bounds, "%d %d\n", &firstmsg, &lastmsg); 253 fclose(bounds); 254 blast = lastmsg; /* save upper bound */ 255 } 256 257 if (clean) 258 keep = t - (rcback? rcback : NDAYS) DAYS; 259 260 if (clean || bounds == NULL) { /* relocate message bounds */ 261 struct dirent *dp; 262 struct stat stbuf; 263 bool seenany = NO; 264 DIR *dirp; 265 266 dirp = opendir(_PATH_MSGS); 267 if (dirp == NULL) 268 err(errno, "%s", _PATH_MSGS); 269 270 firstmsg = 32767; 271 lastmsg = 0; 272 273 for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)){ 274 cp = dp->d_name; 275 int i = 0; 276 277 if (dp->d_ino == 0) 278 continue; 279 if (dp->d_namlen == 0) 280 continue; 281 282 if (clean) 283 snprintf(inbuf, sizeof(inbuf), "%s/%s", _PATH_MSGS, cp); 284 285 while (isdigit(*cp)) 286 i = i * 10 + *cp++ - '0'; 287 if (*cp) 288 continue; /* not a message! */ 289 290 if (clean) { 291 if (stat(inbuf, &stbuf) != 0) 292 continue; 293 if (stbuf.st_mtime < keep 294 && stbuf.st_mode&S_IWRITE) { 295 unlink(inbuf); 296 continue; 297 } 298 } 299 300 if (i > lastmsg) 301 lastmsg = i; 302 if (i < firstmsg) 303 firstmsg = i; 304 seenany = YES; 305 } 306 closedir(dirp); 307 308 if (!seenany) { 309 if (blast != 0) /* never lower the upper bound! */ 310 lastmsg = blast; 311 firstmsg = lastmsg + 1; 312 } 313 else if (blast > lastmsg) 314 lastmsg = blast; 315 316 if (!send_msg) { 317 bounds = fopen(fname, "w"); 318 if (bounds == NULL) 319 err(errno, "%s", fname); 320 chmod(fname, CMODE); 321 fprintf(bounds, "%d %d\n", firstmsg, lastmsg); 322 fclose(bounds); 323 } 324 } 325 326 if (send_msg) { 327 /* 328 * Send mode - place msgs in _PATH_MSGS 329 */ 330 bounds = fopen(fname, "w"); 331 if (bounds == NULL) 332 err(errno, "%s", fname); 333 334 nextmsg = lastmsg + 1; 335 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, nextmsg); 336 newmsg = fopen(fname, "w"); 337 if (newmsg == NULL) 338 err(errno, "%s", fname); 339 chmod(fname, CMODE); 340 341 fprintf(bounds, "%d %d\n", firstmsg, nextmsg); 342 fclose(bounds); 343 344 sending = YES; 345 if (ruptible) 346 signal(SIGINT, onintr); 347 348 if (isatty(fileno(stdin))) { 349 ptr = getpwuid(uid)->pw_name; 350 printf("Message %d:\nFrom %s %sSubject: ", 351 nextmsg, ptr, ctime(&t)); 352 fflush(stdout); 353 fgets(inbuf, sizeof inbuf, stdin); 354 putchar('\n'); 355 fflush(stdout); 356 fprintf(newmsg, "From %s %sSubject: %s\n", 357 ptr, ctime(&t), inbuf); 358 blankline = seensubj = YES; 359 } 360 else 361 blankline = seensubj = NO; 362 for (;;) { 363 fgets(inbuf, sizeof inbuf, stdin); 364 if (feof(stdin) || ferror(stdin)) 365 break; 366 blankline = (blankline || (inbuf[0] == '\n')); 367 seensubj = (seensubj || (!blankline && (strncmp(inbuf, "Subj", 4) == 0))); 368 fputs(inbuf, newmsg); 369 } 370 #ifdef OBJECT 371 if (!seensubj) { 372 printf("NOTICE: Messages should have a Subject field!\n"); 373 #ifdef REJECT 374 unlink(fname); 375 #endif 376 exit(1); 377 } 378 #endif 379 exit(ferror(stdin)); 380 } 381 if (clean) 382 exit(0); 383 384 /* 385 * prepare to display messages 386 */ 387 totty = (isatty(fileno(stdout)) != 0); 388 use_pager = use_pager && totty; 389 390 if ((cp = getenv("HOME")) == NULL || *cp == '\0') { 391 fprintf(stderr, "Error, no home directory!\n"); 392 exit(1); 393 } 394 snprintf(fname, sizeof(fname), "%s/%s", cp, MSGSRC); 395 msgsrc = fopen(fname, "r"); 396 if (msgsrc) { 397 newrc = NO; 398 fscanf(msgsrc, "%d\n", &nextmsg); 399 fclose(msgsrc); 400 if (nextmsg > lastmsg+1) { 401 printf("Warning: bounds have been reset (%d, %d)\n", 402 firstmsg, lastmsg); 403 truncate(fname, (off_t)0); 404 newrc = YES; 405 } 406 else if (!rcfirst) 407 rcfirst = nextmsg - rcback; 408 } 409 else 410 newrc = YES; 411 msgsrc = fopen(fname, "r+"); 412 if (msgsrc == NULL) 413 msgsrc = fopen(fname, "w"); 414 if (msgsrc == NULL) 415 err(errno, "%s", fname); 416 if (rcfirst) { 417 if (rcfirst > lastmsg+1) { 418 printf("Warning: the last message is number %d.\n", 419 lastmsg); 420 rcfirst = nextmsg; 421 } 422 if (rcfirst > firstmsg) 423 firstmsg = rcfirst; /* don't set below first msg */ 424 } 425 if (newrc) { 426 nextmsg = firstmsg; 427 rewind(msgsrc); 428 fprintf(msgsrc, "%d\n", nextmsg); 429 fflush(msgsrc); 430 } 431 432 #ifdef V7 433 if (totty) { 434 struct winsize win; 435 if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1) 436 Lpp = win.ws_row; 437 if (Lpp <= 0) { 438 if (tgetent(inbuf, getenv("TERM")) <= 0 439 || (Lpp = tgetnum("li")) <= 0) { 440 Lpp = NLINES; 441 } 442 } 443 } 444 #endif 445 Lpp -= 6; /* for headers, etc. */ 446 447 already = NO; 448 prevmsg = firstmsg; 449 printing = YES; 450 if (ruptible) 451 signal(SIGINT, onintr); 452 453 /* 454 * Main program loop 455 */ 456 for (msg = firstmsg; msg <= lastmsg; msg++) { 457 458 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, msg); 459 newmsg = fopen(fname, "r"); 460 if (newmsg == NULL) 461 continue; 462 463 gfrsub(newmsg); /* get From and Subject fields */ 464 if (locomode && !local) { 465 fclose(newmsg); 466 continue; 467 } 468 469 if (qopt) { /* This has to be located here */ 470 printf("There are new messages.\n"); 471 exit(0); 472 } 473 474 if (already && !hdrs) 475 putchar('\n'); 476 477 /* 478 * Print header 479 */ 480 if (totty) 481 signal(SIGTSTP, onsusp); 482 (void) setjmp(tstpbuf); 483 already = YES; 484 nlines = 2; 485 if (seenfrom) { 486 printf("Message %d:\nFrom %s %s", msg, from, date); 487 nlines++; 488 } 489 if (seensubj) { 490 printf("Subject: %s", subj); 491 nlines++; 492 } 493 else { 494 if (seenfrom) { 495 putchar('\n'); 496 nlines++; 497 } 498 while (nlines < 6 499 && fgets(inbuf, sizeof inbuf, newmsg) 500 && inbuf[0] != '\n') { 501 fputs(inbuf, stdout); 502 nlines++; 503 } 504 } 505 506 lct = linecnt(newmsg); 507 if (lct) 508 printf("(%d%sline%s) ", lct, seensubj? " " : " more ", 509 (lct == 1) ? "" : "s"); 510 511 if (hdrs) { 512 printf("\n-----\n"); 513 fclose(newmsg); 514 continue; 515 } 516 517 /* 518 * Ask user for command 519 */ 520 if (totty) 521 ask(lct? MORE : (msg==lastmsg? NOMORE : NEXT)); 522 else 523 inbuf[0] = 'y'; 524 if (totty) 525 signal(SIGTSTP, SIG_DFL); 526 cmnd: 527 in = inbuf; 528 switch (*in) { 529 case 'x': 530 /* FALLTHROUGH */ 531 case 'X': 532 exit(0); 533 /* NOTREACHED */ 534 535 case 'q': 536 /* FALLTHROUGH */ 537 case 'Q': 538 quitit = YES; 539 printf("--Postponed--\n"); 540 exit(0); 541 /* NOTREACHED */ 542 543 case 'n': 544 /* FALLTHROUGH */ 545 case 'N': 546 if (msg >= nextmsg) sep = "Flushed"; 547 prevmsg = msg; 548 break; 549 550 case 'p': 551 /* FALLTHROUGH */ 552 case 'P': 553 use_pager = (*in++ == 'p'); 554 /* FALLTHROUGH */ 555 case '\n': 556 /* FALLTHROUGH */ 557 case 'y': 558 default: 559 if (*in == '-') { 560 msg = prevmsg-1; 561 sep = "replay"; 562 break; 563 } 564 if (isdigit(*in)) { 565 msg = next(in); 566 sep = in; 567 break; 568 } 569 570 prmesg(nlines + lct + (seensubj? 1 : 0)); 571 prevmsg = msg; 572 573 } 574 575 printf("--%s--\n", sep); 576 sep = "-"; 577 if (msg >= nextmsg) { 578 nextmsg = msg + 1; 579 rewind(msgsrc); 580 fprintf(msgsrc, "%d\n", nextmsg); 581 fflush(msgsrc); 582 } 583 if (newmsg) 584 fclose(newmsg); 585 if (quitit) 586 break; 587 } 588 589 /* 590 * Make sure .rc file gets updated 591 */ 592 if (--msg >= nextmsg) { 593 nextmsg = msg + 1; 594 rewind(msgsrc); 595 fprintf(msgsrc, "%d\n", nextmsg); 596 fflush(msgsrc); 597 } 598 if (already && !quitit && lastcmd && totty) { 599 /* 600 * save or reply to last message? 601 */ 602 msg = prevmsg; 603 ask(NOMORE); 604 if (inbuf[0] == '-' || isdigit(inbuf[0])) 605 goto cmnd; 606 } 607 if (!(already || hush || qopt)) 608 printf("No new messages.\n"); 609 exit(0); 610 /* NOTREACHED */ 611 } 612 613 static void 614 usage(void) 615 { 616 fprintf(stderr, "usage: msgs [fhlopq] [[-]number]\n"); 617 exit(1); 618 } 619 620 static void 621 prmesg(int length) 622 { 623 FILE *outf; 624 char *env_pager; 625 626 if (use_pager && length > Lpp) { 627 signal(SIGPIPE, SIG_IGN); 628 signal(SIGQUIT, SIG_IGN); 629 if ((env_pager = getenv("PAGER")) == NULL) { 630 snprintf(cmdbuf, sizeof(cmdbuf), _PATH_PAGER, Lpp); 631 } else { 632 snprintf(cmdbuf, sizeof(cmdbuf), "%s", env_pager); 633 } 634 outf = popen(cmdbuf, "w"); 635 if (!outf) 636 outf = stdout; 637 else 638 setbuf(outf, (char *)NULL); 639 } 640 else 641 outf = stdout; 642 643 if (seensubj) 644 putc('\n', outf); 645 646 while (fgets(inbuf, sizeof inbuf, newmsg)) { 647 fputs(inbuf, outf); 648 if (ferror(outf)) { 649 clearerr(outf); 650 break; 651 } 652 } 653 654 if (outf != stdout) { 655 pclose(outf); 656 signal(SIGPIPE, SIG_DFL); 657 signal(SIGQUIT, SIG_DFL); 658 } 659 else { 660 fflush(stdout); 661 } 662 663 /* force wait on output */ 664 tcdrain(fileno(stdout)); 665 } 666 667 static void 668 onintr(int unused __unused) 669 { 670 signal(SIGINT, onintr); 671 if (mailing) 672 unlink(fname); 673 if (sending) { 674 unlink(fname); 675 puts("--Killed--"); 676 exit(1); 677 } 678 if (printing) { 679 putchar('\n'); 680 if (hdrs) 681 exit(0); 682 sep = "Interrupt"; 683 if (newmsg) 684 fseeko(newmsg, (off_t)0, SEEK_END); 685 intrpflg = YES; 686 } 687 } 688 689 /* 690 * We have just gotten a susp. Suspend and prepare to resume. 691 */ 692 static void 693 onsusp(int unused __unused) 694 { 695 signal(SIGTSTP, SIG_DFL); 696 sigsetmask(0); 697 kill(0, SIGTSTP); 698 signal(SIGTSTP, onsusp); 699 if (!mailing) 700 longjmp(tstpbuf, 0); 701 } 702 703 static int 704 linecnt(FILE *f) 705 { 706 off_t oldpos = ftello(f); 707 int l = 0; 708 char lbuf[BUFSIZ]; 709 710 while (fgets(lbuf, sizeof lbuf, f)) 711 l++; 712 clearerr(f); 713 fseeko(f, oldpos, SEEK_SET); 714 return (l); 715 } 716 717 static int 718 next(char *buf) 719 { 720 int i; 721 sscanf(buf, "%d", &i); 722 sprintf(buf, "Goto %d", i); 723 return(--i); 724 } 725 726 static void 727 ask(const char *prompt) 728 { 729 char inch; 730 int n, cmsg, fd; 731 off_t oldpos; 732 FILE *cpfrom, *cpto; 733 734 printf("%s ", prompt); 735 fflush(stdout); 736 intrpflg = NO; 737 (void) fgets(inbuf, sizeof inbuf, stdin); 738 if ((n = strlen(inbuf)) > 0 && inbuf[n - 1] == '\n') 739 inbuf[n - 1] = '\0'; 740 if (intrpflg) 741 inbuf[0] = 'x'; 742 743 /* 744 * Handle 'mail' and 'save' here. 745 */ 746 if ((inch = inbuf[0]) == 's' || inch == 'm') { 747 if (inbuf[1] == '-') 748 cmsg = prevmsg; 749 else if (isdigit(inbuf[1])) 750 cmsg = atoi(&inbuf[1]); 751 else 752 cmsg = msg; 753 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, cmsg); 754 755 oldpos = ftello(newmsg); 756 757 cpfrom = fopen(fname, "r"); 758 if (!cpfrom) { 759 printf("Message %d not found\n", cmsg); 760 ask (prompt); 761 return; 762 } 763 764 if (inch == 's') { 765 in = nxtfld(inbuf); 766 if (*in) { 767 for (n=0; in[n] > ' '; n++) { /* sizeof fname? */ 768 fname[n] = in[n]; 769 } 770 fname[n] = '\0'; 771 } 772 else 773 strcpy(fname, "Messages"); 774 fd = open(fname, O_RDWR|O_EXCL|O_CREAT|O_APPEND); 775 } 776 else { 777 strcpy(fname, _PATH_TMP); 778 fd = mkstemp(fname); 779 if (fd != -1) { 780 snprintf(cmdbuf, sizeof(cmdbuf), _PATH_MAIL, 781 fname); 782 mailing = YES; 783 } 784 } 785 if (fd == -1 || (cpto = fdopen(fd, "a")) == NULL) { 786 if (fd != -1) 787 close(fd); 788 warn("%s", fname); 789 mailing = NO; 790 fseeko(newmsg, oldpos, SEEK_SET); 791 ask(prompt); 792 fclose(cpfrom); 793 return; 794 } 795 796 while ((n = fread(inbuf, 1, sizeof inbuf, cpfrom))) 797 fwrite(inbuf, 1, n, cpto); 798 799 fclose(cpfrom); 800 fclose(cpto); 801 fseeko(newmsg, oldpos, SEEK_SET);/* reposition current message */ 802 if (inch == 's') 803 printf("Message %d saved in \"%s\"\n", cmsg, fname); 804 else { 805 system(cmdbuf); 806 unlink(fname); 807 mailing = NO; 808 } 809 ask(prompt); 810 } 811 } 812 813 static void 814 gfrsub(FILE *infile) 815 { 816 off_t frompos; 817 int count; 818 819 seensubj = seenfrom = NO; 820 local = YES; 821 subj[0] = from[0] = date[0] = '\0'; 822 823 /* 824 * Is this a normal message? 825 */ 826 if (fgets(inbuf, sizeof inbuf, infile)) { 827 if (strncmp(inbuf, "From", 4)==0) { 828 /* 829 * expected form starts with From 830 */ 831 seenfrom = YES; 832 frompos = ftello(infile); 833 ptr = from; 834 in = nxtfld(inbuf); 835 if (*in) { 836 count = sizeof(from) - 1; 837 while (*in && *in > ' ' && count-- > 0) { 838 if (*in == ':' || *in == '@' || 839 *in == '!') 840 local = NO; 841 *ptr++ = *in++; 842 } 843 } 844 *ptr = '\0'; 845 if (*(in = nxtfld(in))) 846 strlcpy(date, in, sizeof date); 847 else { 848 date[0] = '\n'; 849 date[1] = '\0'; 850 } 851 } 852 else { 853 /* 854 * not the expected form 855 */ 856 rewind(infile); 857 return; 858 } 859 } 860 else 861 /* 862 * empty file ? 863 */ 864 return; 865 866 /* 867 * look for Subject line until EOF or a blank line 868 */ 869 while (fgets(inbuf, sizeof inbuf, infile) 870 && !(blankline = (inbuf[0] == '\n'))) { 871 /* 872 * extract Subject line 873 */ 874 if (!seensubj && strncmp(inbuf, "Subj", 4)==0) { 875 seensubj = YES; 876 frompos = ftello(infile); 877 strlcpy(subj, nxtfld(inbuf), sizeof subj); 878 } 879 } 880 if (!blankline) 881 /* 882 * ran into EOF 883 */ 884 fseeko(infile, frompos, SEEK_SET); 885 886 if (!seensubj) 887 /* 888 * for possible use with Mail 889 */ 890 strlcpy(subj, "(No Subject)\n", sizeof subj); 891 } 892 893 static char * 894 nxtfld(char *s) 895 { 896 if (*s) while (*s && !isspace(*s)) s++; /* skip over this field */ 897 if (*s) while (*s && isspace(*s)) s++; /* find start of next field */ 898 return (s); 899 } 900