1 /* $NetBSD: msgs.c,v 1.23 2013/10/18 20:47:06 christos Exp $ */ 2 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 #include <sys/cdefs.h> 33 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 1980, 1993\ 35 The Regents of the University of California. All rights reserved."); 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)msgs.c 8.2 (Berkeley) 4/28/95"; 41 #else 42 __RCSID("$NetBSD: msgs.c,v 1.23 2013/10/18 20:47:06 christos Exp $"); 43 #endif 44 #endif /* not lint */ 45 46 /* 47 * msgs - a user bulletin board program 48 * 49 * usage: 50 * msgs [fhlopqr] [[-]number] to read messages 51 * msgs -s to place messages 52 * msgs -c [-days] to clean up the bulletin board 53 * 54 * prompt commands are: 55 * y print message 56 * n flush message, go to next message 57 * q flush message, quit 58 * p print message, turn on 'pipe thru more' mode 59 * P print message, turn off 'pipe thru more' mode 60 * - reprint last message 61 * s[-][<num>] [<filename>] save message 62 * m[-][<num>] mail with message in temp mbox 63 * x exit without flushing this message 64 * <num> print message number <num> 65 */ 66 67 #define V7 /* will look for TERM in the environment */ 68 #define OBJECT /* will object to messages without Subjects */ 69 #define REJECT /* will reject messages without Subjects 70 (OBJECT must be defined also) */ 71 /*#define UNBUFFERED */ /* use unbuffered output */ 72 73 #include <sys/param.h> 74 #include <sys/ioctl.h> 75 #include <sys/stat.h> 76 77 #include <ctype.h> 78 #include <dirent.h> 79 #include <err.h> 80 #include <errno.h> 81 #include <pwd.h> 82 #include <setjmp.h> 83 #include <signal.h> 84 #include <stdio.h> 85 #include <stdlib.h> 86 #include <string.h> 87 #include <termcap.h> 88 #include <termios.h> 89 #include <time.h> 90 #include <unistd.h> 91 92 #include "pathnames.h" 93 94 #define CMODE 0664 /* 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 FILE *msgsrc; 111 FILE *newmsg; 112 const char *sep = "-"; 113 char inbuf[BUFSIZ]; 114 char fname[MAXPATHLEN]; 115 char cmdbuf[MAXPATHLEN + 16]; 116 char subj[128]; 117 char from[128]; 118 char date[128]; 119 char *ptr; 120 char *in; 121 bool local; 122 bool ruptible; 123 bool totty; 124 bool seenfrom; 125 bool seensubj; 126 bool blankline; 127 bool printing = NO; 128 bool mailing = NO; 129 bool quitit = NO; 130 bool sending = NO; 131 bool intrpflg = NO; 132 bool restricted = NO; 133 int uid; 134 int msg; 135 int prevmsg; 136 int lct; 137 int nlines; 138 int Lpp = 0; 139 time_t t; 140 time_t keep; 141 142 void ask(const char *); 143 void gfrsub(FILE *); 144 int linecnt(FILE *); 145 int main(int, char *[]); 146 int next(char *, size_t); 147 char *nxtfld(char *); 148 void onintr(int); 149 void onsusp(int); 150 void prmesg(int); 151 152 /* option initialization */ 153 bool hdrs = NO; 154 bool qopt = NO; 155 bool hush = NO; 156 bool send_msg = NO; 157 bool locomode = NO; 158 bool use_pager = NO; 159 bool clean = NO; 160 bool lastcmd = NO; 161 jmp_buf tstpbuf; 162 163 int 164 main(int argc, char *argv[]) 165 { 166 bool newrc, already; 167 int rcfirst = 0; /* first message to print (from .rc) */ 168 int rcback = 0; /* amount to back off of rcfirst */ 169 int firstmsg, nextmsg, lastmsg = 0; 170 int blast = 0; 171 FILE *bounds; 172 struct passwd *pw; 173 174 #ifdef UNBUFFERED 175 setbuf(stdout, NULL); 176 #endif 177 178 time(&t); 179 setuid(uid = getuid()); 180 ruptible = (signal(SIGINT, SIG_IGN) == SIG_DFL); 181 if (ruptible) 182 signal(SIGINT, SIG_DFL); 183 184 argc--, argv++; 185 while (argc > 0) { 186 if (isdigit((unsigned char)argv[0][0])) {/* starting message # */ 187 rcfirst = atoi(argv[0]); 188 } 189 else if (isdigit((unsigned char)argv[0][1])) {/* backward offset */ 190 rcback = atoi( &( argv[0][1] ) ); 191 } 192 else { 193 ptr = *argv; 194 while (*ptr) switch (*ptr++) { 195 196 case '-': 197 break; 198 199 case 'c': 200 if (uid != SUPERUSER && uid != DAEMON) { 201 fprintf(stderr, "Sorry\n"); 202 exit(1); 203 } 204 clean = YES; 205 break; 206 207 case 'f': /* silently */ 208 hush = YES; 209 break; 210 211 case 'h': /* headers only */ 212 hdrs = YES; 213 break; 214 215 case 'l': /* local msgs only */ 216 locomode = YES; 217 break; 218 219 case 'o': /* option to save last message */ 220 lastcmd = YES; 221 break; 222 223 case 'p': /* pipe thru 'more' during long msgs */ 224 use_pager = YES; 225 break; 226 227 case 'q': /* query only */ 228 qopt = YES; 229 break; 230 231 case 'r': /* restricted */ 232 restricted = YES; 233 break; 234 235 236 case 's': /* sending TO msgs */ 237 send_msg = YES; 238 break; 239 240 default: 241 fprintf(stderr, 242 "usage: msgs [cfhlopqrs] [[-]number]\n"); 243 exit(1); 244 } 245 } 246 argc--, argv++; 247 } 248 249 /* 250 * determine current message bounds 251 */ 252 snprintf(fname, sizeof (fname), "%s/%s", _PATH_MSGS, BOUNDS); 253 bounds = fopen(fname, "r"); 254 255 if (bounds != NULL) { 256 if (fscanf(bounds, "%d %d\n", &firstmsg, &lastmsg) < 2) 257 firstmsg = lastmsg = 0; 258 fclose(bounds); 259 blast = lastmsg; /* save upper bound */ 260 } 261 262 if (clean) 263 keep = t - (rcback? rcback : NDAYS) DAYS; 264 265 if (clean || bounds == NULL) { /* relocate message bounds */ 266 struct dirent *dp; 267 struct stat stbuf; 268 bool seenany = NO; 269 DIR *dirp; 270 271 dirp = opendir(_PATH_MSGS); 272 if (dirp == NULL) { 273 perror(_PATH_MSGS); 274 exit(errno); 275 } 276 chmod(fname, CMODE); 277 278 firstmsg = 32767; 279 lastmsg = 0; 280 281 for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)){ 282 char *cp = dp->d_name; 283 int i = 0; 284 285 if (dp->d_ino == 0) 286 continue; 287 #ifndef __SVR4 288 if (dp->d_namlen == 0) 289 continue; 290 #endif 291 292 if (clean) 293 snprintf(inbuf, sizeof (inbuf), "%s/%s", 294 _PATH_MSGS, cp); 295 296 while (isdigit((unsigned char)*cp)) 297 i = i * 10 + *cp++ - '0'; 298 if (*cp) 299 continue; /* not a message! */ 300 301 if (clean) { 302 if (stat(inbuf, &stbuf) != 0) 303 continue; 304 if (stbuf.st_mtime < keep 305 && stbuf.st_mode&S_IWRITE) { 306 unlink(inbuf); 307 continue; 308 } 309 } 310 311 if (i > lastmsg) 312 lastmsg = i; 313 if (i < firstmsg) 314 firstmsg = i; 315 seenany = YES; 316 } 317 closedir(dirp); 318 319 if (!seenany) { 320 if (blast != 0) /* never lower the upper bound! */ 321 lastmsg = blast; 322 firstmsg = lastmsg + 1; 323 } 324 else if (blast > lastmsg) 325 lastmsg = blast; 326 327 if (!send_msg) { 328 bounds = fopen(fname, "w"); 329 if (bounds == NULL) { 330 perror(fname); 331 exit(errno); 332 } 333 chmod(fname, CMODE); 334 fprintf(bounds, "%d %d\n", firstmsg, lastmsg); 335 fclose(bounds); 336 } 337 } 338 339 if (send_msg) { 340 /* 341 * Send mode - place msgs in _PATH_MSGS 342 */ 343 bounds = fopen(fname, "w"); 344 if (bounds == NULL) { 345 perror(fname); 346 exit(errno); 347 } 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 perror(fname); 354 exit(errno); 355 } 356 chmod(fname, 0644); 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 pw = getpwuid(uid); 367 if (!pw) { 368 fprintf(stderr, "Who are you?\n"); 369 exit(1); 370 } 371 printf("Message %d:\nFrom %s %sSubject: ", 372 nextmsg, pw->pw_name, ctime(&t)); 373 fflush(stdout); 374 fgets(inbuf, sizeof inbuf, stdin); 375 putchar('\n'); 376 fflush(stdout); 377 fprintf(newmsg, "From %s %sSubject: %s\n", 378 ptr, ctime(&t), inbuf); 379 blankline = seensubj = YES; 380 } 381 else 382 blankline = seensubj = NO; 383 for (;;) { 384 fgets(inbuf, sizeof inbuf, stdin); 385 if (feof(stdin) || ferror(stdin)) 386 break; 387 blankline = (blankline || (inbuf[0] == '\n')); 388 seensubj = (seensubj || (!blankline && (strncmp(inbuf, "Subj", 4) == 0))); 389 fputs(inbuf, newmsg); 390 } 391 #ifdef OBJECT 392 if (!seensubj) { 393 printf("NOTICE: Messages should have a Subject field!\n"); 394 #ifdef REJECT 395 unlink(fname); 396 #endif 397 exit(1); 398 } 399 #endif 400 exit(ferror(stdin)); 401 } 402 if (clean) 403 exit(0); 404 405 /* 406 * prepare to display messages 407 */ 408 totty = (isatty(fileno(stdout)) != 0); 409 use_pager = use_pager && totty; 410 411 { 412 char *home = getenv("HOME"); 413 if(home == NULL || *home == '\0') 414 errx(1, "$HOME not set"); 415 snprintf(fname, sizeof (fname), "%s/%s", home, MSGSRC); 416 } 417 msgsrc = fopen(fname, "r"); 418 if (msgsrc) { 419 newrc = NO; 420 fscanf(msgsrc, "%d\n", &nextmsg); 421 fclose(msgsrc); 422 if (nextmsg > lastmsg+1) { 423 printf("Warning: bounds have been reset (%d, %d)\n", 424 firstmsg, lastmsg); 425 truncate(fname, (off_t)0); 426 newrc = YES; 427 } 428 else if (!rcfirst) 429 rcfirst = nextmsg - rcback; 430 } 431 else 432 newrc = YES; 433 msgsrc = fopen(fname, "r+"); 434 if (msgsrc == NULL) 435 msgsrc = fopen(fname, "w"); 436 if (msgsrc == NULL) { 437 perror(fname); 438 exit(errno); 439 } 440 if (rcfirst) { 441 if (rcfirst > lastmsg+1) { 442 printf("Warning: the last message is number %d.\n", 443 lastmsg); 444 rcfirst = nextmsg; 445 } 446 if (rcfirst > firstmsg) 447 firstmsg = rcfirst; /* don't set below first msg */ 448 } 449 if (newrc) { 450 nextmsg = firstmsg; 451 fseek(msgsrc, 0L, 0); 452 fprintf(msgsrc, "%d\n", nextmsg); 453 fflush(msgsrc); 454 } 455 456 #ifdef V7 457 if (totty) { 458 struct winsize win; 459 if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1) 460 Lpp = win.ws_row; 461 if (Lpp <= 0) { 462 if (tgetent(inbuf, getenv("TERM")) <= 0 463 || (Lpp = tgetnum("li")) <= 0) { 464 Lpp = NLINES; 465 } 466 } 467 } 468 #endif 469 Lpp -= 6; /* for headers, etc. */ 470 471 already = NO; 472 prevmsg = firstmsg; 473 printing = YES; 474 if (ruptible) 475 signal(SIGINT, onintr); 476 477 /* 478 * Main program loop 479 */ 480 for (msg = firstmsg; msg <= lastmsg; msg++) { 481 482 snprintf(fname, sizeof (fname), "%s/%d", _PATH_MSGS, msg); 483 newmsg = fopen(fname, "r"); 484 if (newmsg == NULL) 485 continue; 486 487 gfrsub(newmsg); /* get From and Subject fields */ 488 if (locomode && !local) { 489 fclose(newmsg); 490 continue; 491 } 492 493 if (qopt) { /* This has to be located here */ 494 printf("There are new messages.\n"); 495 exit(0); 496 } 497 498 if (already && !hdrs) 499 putchar('\n'); 500 501 /* 502 * Print header 503 */ 504 if (totty) 505 signal(SIGTSTP, onsusp); 506 (void) setjmp(tstpbuf); 507 already = YES; 508 nlines = 2; 509 if (seenfrom) { 510 printf("Message %d:\nFrom %s %s", msg, from, date); 511 nlines++; 512 } 513 if (seensubj) { 514 printf("Subject: %s", subj); 515 nlines++; 516 } 517 else { 518 if (seenfrom) { 519 putchar('\n'); 520 nlines++; 521 } 522 while (nlines < 6 523 && fgets(inbuf, sizeof inbuf, newmsg) 524 && inbuf[0] != '\n') { 525 fputs(inbuf, stdout); 526 nlines++; 527 } 528 } 529 530 lct = linecnt(newmsg); 531 if (lct) 532 printf("(%d%slines) ", lct, seensubj? " " : " more "); 533 534 if (hdrs) { 535 printf("\n-----\n"); 536 fclose(newmsg); 537 continue; 538 } 539 540 /* 541 * Ask user for command 542 */ 543 if (totty) 544 ask(lct? MORE : (msg==lastmsg? NOMORE : NEXT)); 545 else 546 inbuf[0] = 'y'; 547 if (totty) 548 signal(SIGTSTP, SIG_DFL); 549 cmnd: 550 in = inbuf; 551 switch (*in) { 552 case 'x': 553 case 'X': 554 exit(0); 555 556 case 'q': 557 case 'Q': 558 quitit = YES; 559 printf("--Postponed--\n"); 560 exit(0); 561 /* intentional fall-thru */ 562 case 'n': 563 case 'N': 564 if (msg >= nextmsg) sep = "Flushed"; 565 prevmsg = msg; 566 break; 567 568 case 'p': 569 case 'P': 570 use_pager = (*in++ == 'p'); 571 /* intentional fallthru */ 572 case '\n': 573 case 'y': 574 default: 575 if (*in == '-') { 576 msg = prevmsg-1; 577 sep = "replay"; 578 break; 579 } 580 if (isdigit((unsigned char)*in)) { 581 msg = next(in, sizeof(inbuf) - 582 (in - inbuf)); 583 sep = in; 584 break; 585 } 586 587 prmesg(nlines + lct + (seensubj? 1 : 0)); 588 prevmsg = msg; 589 590 } 591 592 printf("--%s--\n", sep); 593 sep = "-"; 594 if (msg >= nextmsg) { 595 nextmsg = msg + 1; 596 fseek(msgsrc, 0L, 0); 597 fprintf(msgsrc, "%d\n", nextmsg); 598 fflush(msgsrc); 599 } 600 if (newmsg) 601 fclose(newmsg); 602 if (quitit) 603 break; 604 } 605 606 /* 607 * Make sure .rc file gets updated 608 */ 609 if (--msg >= nextmsg) { 610 nextmsg = msg + 1; 611 fseek(msgsrc, 0L, 0); 612 fprintf(msgsrc, "%d\n", nextmsg); 613 fflush(msgsrc); 614 } 615 if (already && !quitit && lastcmd && totty) { 616 /* 617 * save or reply to last message? 618 */ 619 msg = prevmsg; 620 ask(NOMORE); 621 if (inbuf[0] == '-' || isdigit((unsigned char)inbuf[0])) 622 goto cmnd; 623 } 624 if (!(already || hush || qopt)) 625 printf("No new messages.\n"); 626 exit(0); 627 } 628 629 void 630 prmesg(int length) 631 { 632 FILE *outf; 633 char *env_pager; 634 635 if (use_pager && length > Lpp) { 636 signal(SIGPIPE, SIG_IGN); 637 signal(SIGQUIT, SIG_IGN); 638 if ((env_pager = getenv("PAGER")) == NULL || 639 env_pager[0] == '\0') { 640 snprintf(cmdbuf, sizeof(cmdbuf), "%s -z%d", 641 _PATH_PAGER, Lpp); 642 } else { 643 strlcpy(cmdbuf, env_pager, sizeof (cmdbuf)); 644 } 645 outf = popen(cmdbuf, "w"); 646 if (!outf) 647 outf = stdout; 648 else 649 setbuf(outf, NULL); 650 } 651 else 652 outf = stdout; 653 654 if (seensubj) 655 putc('\n', outf); 656 657 while (fgets(inbuf, sizeof inbuf, newmsg)) { 658 fputs(inbuf, outf); 659 if (ferror(outf)) { 660 clearerr(outf); 661 break; 662 } 663 } 664 665 if (outf != stdout) { 666 pclose(outf); 667 signal(SIGPIPE, SIG_DFL); 668 signal(SIGQUIT, SIG_DFL); 669 } 670 else { 671 fflush(stdout); 672 } 673 674 /* trick to force wait on output */ 675 tcdrain(fileno(stdout)); 676 } 677 678 void 679 onintr(int dummy) 680 { 681 signal(SIGINT, onintr); 682 if (mailing) 683 unlink(fname); 684 if (sending) { 685 unlink(fname); 686 puts("--Killed--"); 687 exit(1); 688 } 689 if (printing) { 690 putchar('\n'); 691 if (hdrs) 692 exit(0); 693 sep = "Interrupt"; 694 if (newmsg) 695 fseek(newmsg, 0L, 2); 696 intrpflg = YES; 697 } 698 } 699 700 /* 701 * We have just gotten a susp. Suspend and prepare to resume. 702 */ 703 void 704 onsusp(int dummy) 705 { 706 707 signal(SIGTSTP, SIG_DFL); 708 sigsetmask(0); 709 kill(0, SIGTSTP); 710 signal(SIGTSTP, onsusp); 711 if (!mailing) 712 longjmp(tstpbuf, 0); 713 } 714 715 int 716 linecnt(FILE *f) 717 { 718 off_t oldpos = ftell(f); 719 int l = 0; 720 char lbuf[BUFSIZ]; 721 722 while (fgets(lbuf, sizeof lbuf, f)) 723 l++; 724 clearerr(f); 725 fseek(f, oldpos, 0); 726 return (l); 727 } 728 729 int 730 next(char *buf, size_t bufsiz) 731 { 732 int i; 733 sscanf(buf, "%d", &i); 734 snprintf(buf, bufsiz, "Goto %d", i); 735 return(--i); 736 } 737 738 void 739 ask(const char *prompt) 740 { 741 char inch; 742 int n, cmsg; 743 off_t oldpos; 744 FILE *cpfrom, *cpto; 745 746 printf("%s ", prompt); 747 fflush(stdout); 748 intrpflg = NO; 749 (void) fgets(inbuf, sizeof inbuf, stdin); 750 if ((n = strlen(inbuf)) > 0 && inbuf[n - 1] == '\n') 751 inbuf[n - 1] = '\0'; 752 if (intrpflg) 753 inbuf[0] = 'x'; 754 755 /* 756 * Handle 'mail' and 'save' here. 757 */ 758 if (((inch = inbuf[0]) == 's' || inch == 'm') && !restricted) { 759 if (inbuf[1] == '-') 760 cmsg = prevmsg; 761 else if (isdigit((unsigned char)inbuf[1])) 762 cmsg = atoi(&inbuf[1]); 763 else 764 cmsg = msg; 765 snprintf(fname, sizeof (fname), "%s/%d", _PATH_MSGS, cmsg); 766 767 oldpos = ftell(newmsg); 768 769 cpfrom = fopen(fname, "r"); 770 if (!cpfrom) { 771 printf("Message %d not found\n", cmsg); 772 ask (prompt); 773 return; 774 } 775 776 if (inch == 's') { 777 in = nxtfld(inbuf); 778 if (*in) { 779 for (n=0; in[n] > ' '; n++) { /* sizeof fname? */ 780 fname[n] = in[n]; 781 } 782 fname[n] = '\0'; 783 } 784 else 785 strlcpy(fname, "Messages", sizeof(fname)); 786 } 787 else { 788 int fd; 789 790 strlcpy(fname, _PATH_TMP, sizeof(fname)); 791 fd = mkstemp(fname); 792 if (fd == -1) 793 err(1, "mkstemp failed"); 794 close(fd); 795 snprintf(cmdbuf, sizeof (cmdbuf), _PATH_MAIL, fname); 796 mailing = YES; 797 } 798 cpto = fopen(fname, "a"); 799 if (!cpto) { 800 perror(fname); 801 mailing = NO; 802 fseek(newmsg, oldpos, 0); 803 ask(prompt); 804 return; 805 } 806 807 while ((n = fread(inbuf, 1, sizeof inbuf, cpfrom)) != 0) 808 fwrite(inbuf, 1, n, cpto); 809 810 fclose(cpfrom); 811 fclose(cpto); 812 fseek(newmsg, oldpos, 0); /* reposition current message */ 813 if (inch == 's') 814 printf("Message %d saved in \"%s\"\n", cmsg, fname); 815 else { 816 system(cmdbuf); 817 unlink(fname); 818 mailing = NO; 819 } 820 ask(prompt); 821 } 822 } 823 824 void 825 gfrsub(FILE *infile) 826 { 827 off_t frompos; 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 = ftell(infile); 843 ptr = from; 844 in = nxtfld(inbuf); 845 if (*in) while (*in && *in > ' ') { 846 if (*in == ':' || *in == '@' || *in == '!') 847 local = NO; 848 *ptr++ = *in++; 849 /* what about sizeof from ? */ 850 } 851 *ptr = '\0'; 852 if (*(in = nxtfld(in))) 853 strncpy(date, in, sizeof date); 854 else { 855 date[0] = '\n'; 856 date[1] = '\0'; 857 } 858 } 859 else { 860 /* 861 * not the expected form 862 */ 863 fseek(infile, 0L, 0); 864 return; 865 } 866 } 867 else 868 /* 869 * empty file ? 870 */ 871 return; 872 873 /* 874 * look for Subject line until EOF or a blank line 875 */ 876 while (fgets(inbuf, sizeof inbuf, infile) 877 && !(blankline = (inbuf[0] == '\n'))) { 878 /* 879 * extract Subject line 880 */ 881 if (!seensubj && strncmp(inbuf, "Subj", 4)==0) { 882 seensubj = YES; 883 frompos = ftell(infile); 884 strncpy(subj, nxtfld(inbuf), sizeof subj); 885 } 886 } 887 if (!blankline) 888 /* 889 * ran into EOF 890 */ 891 fseek(infile, frompos, 0); 892 893 if (!seensubj) 894 /* 895 * for possible use with Mail 896 */ 897 strncpy(subj, "(No Subject)\n", sizeof subj); 898 } 899 900 char * 901 nxtfld(char *s) 902 { 903 if (*s) while (*s && *s > ' ') s++; /* skip over this field */ 904 if (*s) while (*s && *s <= ' ') s++; /* find start of next field */ 905 return (s); 906 } 907