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
main(int argc,char * argv[])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
usage(void)629 usage(void)
630 {
631 fprintf(stderr, "usage: msgs [fhlopq] [[-]number]\n");
632 exit(1);
633 }
634
635 static void
prmesg(int length)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
onintr(int unused __unused)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
onsusp(int unused __unused)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
linecnt(FILE * f)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
next(char * buf)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
ask(const char * prompt)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
gfrsub(FILE * infile)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 *
nxtfld(char * s)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