1 /*-
2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #ifndef lint
31 static const char copyright[] =
32 "@(#) Copyright (c) 1980, 1993\n\
33 The Regents of the University of California. All rights reserved.\n";
34 #endif /* not lint */
35
36 #if 0
37 #ifndef lint
38 static char sccsid[] = "@(#)msgs.c 8.2 (Berkeley) 4/28/95";
39 #endif /* not lint */
40 #endif
41
42 #include <sys/cdefs.h>
43 __FBSDID("$FreeBSD$");
44
45 /*
46 * msgs - a user bulletin board program
47 *
48 * usage:
49 * msgs [fhlopq] [[-]number] to read messages
50 * msgs -s to place messages
51 * msgs -c [-days] to clean up the bulletin board
52 *
53 * prompt commands are:
54 * y print message
55 * n flush message, go to next message
56 * q flush message, quit
57 * p print message, turn on 'pipe thru more' mode
58 * P print message, turn off 'pipe thru more' mode
59 * - reprint last message
60 * s[-][<num>] [<filename>] save message
61 * m[-][<num>] mail with message in temp mbox
62 * x exit without flushing this message
63 * <num> print message number <num>
64 */
65
66 #define V7 /* will look for TERM in the environment */
67 #define OBJECT /* will object to messages without Subjects */
68 /* #define REJECT */ /* will reject messages without Subjects
69 (OBJECT must be defined also) */
70 /* #define UNBUFFERED *//* use unbuffered output */
71
72 #include <sys/param.h>
73 #include <sys/stat.h>
74 #include <ctype.h>
75 #include <dirent.h>
76 #include <err.h>
77 #include <errno.h>
78 #include <fcntl.h>
79 #include <locale.h>
80 #include <pwd.h>
81 #include <setjmp.h>
82 #include <termcap.h>
83 #include <termios.h>
84 #include <signal.h>
85 #include <stdio.h>
86 #include <stdlib.h>
87 #include <string.h>
88 #include <time.h>
89 #include <unistd.h>
90 #include "pathnames.h"
91
92 #define CMODE 0644 /* bounds file creation mode */
93 #define NO 0
94 #define YES 1
95 #define SUPERUSER 0 /* superuser uid */
96 #define DAEMON 1 /* daemon uid */
97 #define NLINES 24 /* default number of lines/crt screen */
98 #define NDAYS 21 /* default keep time for messages */
99 #define DAYS *24*60*60 /* seconds/day */
100 #define MSGSRC ".msgsrc" /* user's rc file */
101 #define BOUNDS "bounds" /* message bounds file */
102 #define NEXT "Next message? [yq]"
103 #define MORE "More? [ynq]"
104 #define NOMORE "(No more) [q] ?"
105
106 typedef char bool;
107
108 static FILE *msgsrc;
109 static FILE *newmsg;
110 static const char *sep = "-";
111 static char inbuf[BUFSIZ];
112 static char fname[MAXPATHLEN];
113 static char cmdbuf[MAXPATHLEN + MAXPATHLEN];
114 static char subj[128];
115 static char from[128];
116 static char date[128];
117 static char *ptr;
118 static char *in;
119 static bool local;
120 static bool ruptible;
121 static bool totty;
122 static bool seenfrom;
123 static bool seensubj;
124 static bool blankline;
125 static bool printing = NO;
126 static bool mailing = NO;
127 static bool quitit = NO;
128 static bool sending = NO;
129 static bool intrpflg = NO;
130 static uid_t uid;
131 static int msg;
132 static int prevmsg;
133 static int lct;
134 static int nlines;
135 static int Lpp = 0;
136 static time_t t;
137 static time_t keep;
138
139 /* option initialization */
140 static bool hdrs = NO;
141 static bool qopt = NO;
142 static bool hush = NO;
143 static bool send_msg = NO;
144 static bool locomode = NO;
145 static bool use_pager = NO;
146 static bool clean = NO;
147 static bool lastcmd = NO;
148 static jmp_buf tstpbuf;
149
150 static void ask(const char *);
151 static void gfrsub(FILE *);
152 static int linecnt(FILE *);
153 static int next(char *);
154 static char *nxtfld(char *);
155 static void onsusp(int);
156 static void onintr(int);
157 static void prmesg(int);
158 static void usage(void);
159
160 int
main(int argc,char * argv[])161 main(int argc, char *argv[])
162 {
163 bool newrc, already;
164 int rcfirst = 0; /* first message to print (from .rc) */
165 int rcback = 0; /* amount to back off of rcfirst */
166 int firstmsg = 0, nextmsg = 0, lastmsg = 0;
167 int blast = 0;
168 struct stat buf; /* stat to check access of bounds */
169 FILE *bounds;
170 char *cp;
171
172 #ifdef UNBUFFERED
173 setbuf(stdout, NULL);
174 #endif
175 setlocale(LC_ALL, "");
176
177 time(&t);
178 if (setuid(uid = getuid()) != 0)
179 err(1, "setuid failed");
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(argv[0][0])) { /* starting message # */
187 rcfirst = atoi(argv[0]);
188 }
189 else if (isdigit(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 errx(1,
202 "only the super-user can use the c flag");
203 clean = YES;
204 break;
205
206 case 'f': /* silently */
207 hush = YES;
208 break;
209
210 case 'h': /* headers only */
211 hdrs = YES;
212 break;
213
214 case 'l': /* local msgs only */
215 locomode = YES;
216 break;
217
218 case 'o': /* option to save last message */
219 lastcmd = YES;
220 break;
221
222 case 'p': /* pipe thru 'more' during long msgs */
223 use_pager = YES;
224 break;
225
226 case 'q': /* query only */
227 qopt = YES;
228 break;
229
230 case 's': /* sending TO msgs */
231 send_msg = YES;
232 break;
233
234 default:
235 usage();
236 }
237 }
238 argc--, argv++;
239 }
240
241 /*
242 * determine current message bounds
243 */
244 snprintf(fname, sizeof(fname), "%s/%s", _PATH_MSGS, BOUNDS);
245
246 /*
247 * Test access rights to the bounds file
248 * This can be a little tricky. if(send_msg), then
249 * we will create it. We assume that if(send_msg),
250 * then you have write permission there.
251 * Else, it better be there, or we bail.
252 */
253 if (send_msg != YES) {
254 if (stat(fname, &buf) < 0) {
255 if (hush != YES) {
256 err(errno, "%s", fname);
257 } else {
258 exit(1);
259 }
260 }
261 }
262 bounds = fopen(fname, "r");
263
264 if (bounds != NULL) {
265 fscanf(bounds, "%d %d\n", &firstmsg, &lastmsg);
266 fclose(bounds);
267 blast = lastmsg; /* save upper bound */
268 }
269
270 if (clean)
271 keep = t - (rcback? rcback : NDAYS) DAYS;
272
273 if (clean || bounds == NULL) { /* relocate message bounds */
274 struct dirent *dp;
275 struct stat stbuf;
276 bool seenany = NO;
277 DIR *dirp;
278
279 dirp = opendir(_PATH_MSGS);
280 if (dirp == NULL)
281 err(errno, "%s", _PATH_MSGS);
282
283 firstmsg = 32767;
284 lastmsg = 0;
285
286 for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)){
287 cp = dp->d_name;
288 int i = 0;
289
290 if (dp->d_ino == 0)
291 continue;
292 if (dp->d_namlen == 0)
293 continue;
294
295 if (clean)
296 snprintf(inbuf, sizeof(inbuf), "%s/%s", _PATH_MSGS, cp);
297
298 while (isdigit(*cp))
299 i = i * 10 + *cp++ - '0';
300 if (*cp)
301 continue; /* not a message! */
302
303 if (clean) {
304 if (stat(inbuf, &stbuf) != 0)
305 continue;
306 if (stbuf.st_mtime < keep
307 && stbuf.st_mode&S_IWRITE) {
308 unlink(inbuf);
309 continue;
310 }
311 }
312
313 if (i > lastmsg)
314 lastmsg = i;
315 if (i < firstmsg)
316 firstmsg = i;
317 seenany = YES;
318 }
319 closedir(dirp);
320
321 if (!seenany) {
322 if (blast != 0) /* never lower the upper bound! */
323 lastmsg = blast;
324 firstmsg = lastmsg + 1;
325 }
326 else if (blast > lastmsg)
327 lastmsg = blast;
328
329 if (!send_msg) {
330 bounds = fopen(fname, "w");
331 if (bounds == NULL)
332 err(errno, "%s", fname);
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 err(errno, "%s", fname);
346
347 nextmsg = lastmsg + 1;
348 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, nextmsg);
349 newmsg = fopen(fname, "w");
350 if (newmsg == NULL)
351 err(errno, "%s", fname);
352 chmod(fname, CMODE);
353
354 fprintf(bounds, "%d %d\n", firstmsg, nextmsg);
355 fclose(bounds);
356
357 sending = YES;
358 if (ruptible)
359 signal(SIGINT, onintr);
360
361 if (isatty(fileno(stdin))) {
362 ptr = getpwuid(uid)->pw_name;
363 printf("Message %d:\nFrom %s %sSubject: ",
364 nextmsg, ptr, ctime(&t));
365 fflush(stdout);
366 fgets(inbuf, sizeof inbuf, stdin);
367 putchar('\n');
368 fflush(stdout);
369 fprintf(newmsg, "From %s %sSubject: %s\n",
370 ptr, ctime(&t), inbuf);
371 blankline = seensubj = YES;
372 }
373 else
374 blankline = seensubj = NO;
375 for (;;) {
376 fgets(inbuf, sizeof inbuf, stdin);
377 if (feof(stdin) || ferror(stdin))
378 break;
379 blankline = (blankline || (inbuf[0] == '\n'));
380 seensubj = (seensubj || (!blankline && (strncmp(inbuf, "Subj", 4) == 0)));
381 fputs(inbuf, newmsg);
382 }
383 #ifdef OBJECT
384 if (!seensubj) {
385 printf("NOTICE: Messages should have a Subject field!\n");
386 #ifdef REJECT
387 unlink(fname);
388 #endif
389 exit(1);
390 }
391 #endif
392 exit(ferror(stdin));
393 }
394 if (clean)
395 exit(0);
396
397 /*
398 * prepare to display messages
399 */
400 totty = (isatty(fileno(stdout)) != 0);
401 use_pager = use_pager && totty;
402
403 if ((cp = getenv("HOME")) == NULL || *cp == '\0') {
404 fprintf(stderr, "Error, no home directory!\n");
405 exit(1);
406 }
407 snprintf(fname, sizeof(fname), "%s/%s", cp, MSGSRC);
408 msgsrc = fopen(fname, "r");
409 if (msgsrc) {
410 newrc = NO;
411 fscanf(msgsrc, "%d\n", &nextmsg);
412 fclose(msgsrc);
413 if (nextmsg > lastmsg+1) {
414 printf("Warning: bounds have been reset (%d, %d)\n",
415 firstmsg, lastmsg);
416 truncate(fname, (off_t)0);
417 newrc = YES;
418 }
419 else if (!rcfirst)
420 rcfirst = nextmsg - rcback;
421 }
422 else
423 newrc = YES;
424 msgsrc = fopen(fname, "r+");
425 if (msgsrc == NULL)
426 msgsrc = fopen(fname, "w");
427 if (msgsrc == NULL)
428 err(errno, "%s", fname);
429 if (rcfirst) {
430 if (rcfirst > lastmsg+1) {
431 printf("Warning: the last message is number %d.\n",
432 lastmsg);
433 rcfirst = nextmsg;
434 }
435 if (rcfirst > firstmsg)
436 firstmsg = rcfirst; /* don't set below first msg */
437 }
438 if (newrc) {
439 nextmsg = firstmsg;
440 rewind(msgsrc);
441 fprintf(msgsrc, "%d\n", nextmsg);
442 fflush(msgsrc);
443 }
444
445 #ifdef V7
446 if (totty) {
447 struct winsize win;
448 if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1)
449 Lpp = win.ws_row;
450 if (Lpp <= 0) {
451 if (tgetent(inbuf, getenv("TERM")) <= 0
452 || (Lpp = tgetnum("li")) <= 0) {
453 Lpp = NLINES;
454 }
455 }
456 }
457 #endif
458 Lpp -= 6; /* for headers, etc. */
459
460 already = NO;
461 prevmsg = firstmsg;
462 printing = YES;
463 if (ruptible)
464 signal(SIGINT, onintr);
465
466 /*
467 * Main program loop
468 */
469 for (msg = firstmsg; msg <= lastmsg; msg++) {
470
471 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, msg);
472 newmsg = fopen(fname, "r");
473 if (newmsg == NULL)
474 continue;
475
476 gfrsub(newmsg); /* get From and Subject fields */
477 if (locomode && !local) {
478 fclose(newmsg);
479 continue;
480 }
481
482 if (qopt) { /* This has to be located here */
483 printf("There are new messages.\n");
484 exit(0);
485 }
486
487 if (already && !hdrs)
488 putchar('\n');
489
490 /*
491 * Print header
492 */
493 if (totty)
494 signal(SIGTSTP, onsusp);
495 (void) setjmp(tstpbuf);
496 already = YES;
497 nlines = 2;
498 if (seenfrom) {
499 printf("Message %d:\nFrom %s %s", msg, from, date);
500 nlines++;
501 }
502 if (seensubj) {
503 printf("Subject: %s", subj);
504 nlines++;
505 }
506 else {
507 if (seenfrom) {
508 putchar('\n');
509 nlines++;
510 }
511 while (nlines < 6
512 && fgets(inbuf, sizeof inbuf, newmsg)
513 && inbuf[0] != '\n') {
514 fputs(inbuf, stdout);
515 nlines++;
516 }
517 }
518
519 lct = linecnt(newmsg);
520 if (lct)
521 printf("(%d%sline%s) ", lct, seensubj? " " : " more ",
522 (lct == 1) ? "" : "s");
523
524 if (hdrs) {
525 printf("\n-----\n");
526 fclose(newmsg);
527 continue;
528 }
529
530 /*
531 * Ask user for command
532 */
533 if (totty)
534 ask(lct? MORE : (msg==lastmsg? NOMORE : NEXT));
535 else
536 inbuf[0] = 'y';
537 if (totty)
538 signal(SIGTSTP, SIG_DFL);
539 cmnd:
540 in = inbuf;
541 switch (*in) {
542 case 'x':
543 /* FALLTHROUGH */
544 case 'X':
545 exit(0);
546 /* NOTREACHED */
547
548 case 'q':
549 /* FALLTHROUGH */
550 case 'Q':
551 quitit = YES;
552 printf("--Postponed--\n");
553 exit(0);
554 /* NOTREACHED */
555
556 case 'n':
557 /* FALLTHROUGH */
558 case 'N':
559 if (msg >= nextmsg) sep = "Flushed";
560 prevmsg = msg;
561 break;
562
563 case 'p':
564 /* FALLTHROUGH */
565 case 'P':
566 use_pager = (*in++ == 'p');
567 /* FALLTHROUGH */
568 case '\n':
569 /* FALLTHROUGH */
570 case 'y':
571 default:
572 if (*in == '-') {
573 msg = prevmsg-1;
574 sep = "replay";
575 break;
576 }
577 if (isdigit(*in)) {
578 msg = next(in);
579 sep = in;
580 break;
581 }
582
583 prmesg(nlines + lct + (seensubj? 1 : 0));
584 prevmsg = msg;
585
586 }
587
588 printf("--%s--\n", sep);
589 sep = "-";
590 if (msg >= nextmsg) {
591 nextmsg = msg + 1;
592 rewind(msgsrc);
593 fprintf(msgsrc, "%d\n", nextmsg);
594 fflush(msgsrc);
595 }
596 if (newmsg)
597 fclose(newmsg);
598 if (quitit)
599 break;
600 }
601
602 /*
603 * Make sure .rc file gets updated
604 */
605 if (--msg >= nextmsg) {
606 nextmsg = msg + 1;
607 rewind(msgsrc);
608 fprintf(msgsrc, "%d\n", nextmsg);
609 fflush(msgsrc);
610 }
611 if (already && !quitit && lastcmd && totty) {
612 /*
613 * save or reply to last message?
614 */
615 msg = prevmsg;
616 ask(NOMORE);
617 if (inbuf[0] == '-' || isdigit(inbuf[0]))
618 goto cmnd;
619 }
620 if (!(already || hush || qopt))
621 printf("No new messages.\n");
622 exit(0);
623 /* NOTREACHED */
624 }
625
626 static void
usage(void)627 usage(void)
628 {
629 fprintf(stderr, "usage: msgs [fhlopq] [[-]number]\n");
630 exit(1);
631 }
632
633 static void
prmesg(int length)634 prmesg(int length)
635 {
636 FILE *outf;
637 char *env_pager;
638
639 if (use_pager && length > Lpp) {
640 signal(SIGPIPE, SIG_IGN);
641 signal(SIGQUIT, SIG_IGN);
642 if ((env_pager = getenv("PAGER")) == NULL) {
643 snprintf(cmdbuf, sizeof(cmdbuf), _PATH_PAGER, Lpp);
644 } else {
645 snprintf(cmdbuf, sizeof(cmdbuf), "%s", env_pager);
646 }
647 outf = popen(cmdbuf, "w");
648 if (!outf)
649 outf = stdout;
650 else
651 setbuf(outf, (char *)NULL);
652 }
653 else
654 outf = stdout;
655
656 if (seensubj)
657 putc('\n', outf);
658
659 while (fgets(inbuf, sizeof inbuf, newmsg)) {
660 fputs(inbuf, outf);
661 if (ferror(outf)) {
662 clearerr(outf);
663 break;
664 }
665 }
666
667 if (outf != stdout) {
668 pclose(outf);
669 signal(SIGPIPE, SIG_DFL);
670 signal(SIGQUIT, SIG_DFL);
671 }
672 else {
673 fflush(stdout);
674 }
675
676 /* force wait on output */
677 tcdrain(fileno(stdout));
678 }
679
680 static void
onintr(int unused __unused)681 onintr(int unused __unused)
682 {
683 signal(SIGINT, onintr);
684 if (mailing)
685 unlink(fname);
686 if (sending) {
687 unlink(fname);
688 puts("--Killed--");
689 exit(1);
690 }
691 if (printing) {
692 putchar('\n');
693 if (hdrs)
694 exit(0);
695 sep = "Interrupt";
696 if (newmsg)
697 fseeko(newmsg, (off_t)0, SEEK_END);
698 intrpflg = YES;
699 }
700 }
701
702 /*
703 * We have just gotten a susp. Suspend and prepare to resume.
704 */
705 static void
onsusp(int unused __unused)706 onsusp(int unused __unused)
707 {
708 signal(SIGTSTP, SIG_DFL);
709 sigsetmask(0);
710 kill(0, SIGTSTP);
711 signal(SIGTSTP, onsusp);
712 if (!mailing)
713 longjmp(tstpbuf, 0);
714 }
715
716 static int
linecnt(FILE * f)717 linecnt(FILE *f)
718 {
719 off_t oldpos = ftello(f);
720 int l = 0;
721 char lbuf[BUFSIZ];
722
723 while (fgets(lbuf, sizeof lbuf, f))
724 l++;
725 clearerr(f);
726 fseeko(f, oldpos, SEEK_SET);
727 return (l);
728 }
729
730 static int
next(char * buf)731 next(char *buf)
732 {
733 int i;
734 sscanf(buf, "%d", &i);
735 sprintf(buf, "Goto %d", i);
736 return(--i);
737 }
738
739 static void
ask(const char * prompt)740 ask(const char *prompt)
741 {
742 char inch;
743 int n, cmsg, fd;
744 off_t oldpos;
745 FILE *cpfrom, *cpto;
746
747 printf("%s ", prompt);
748 fflush(stdout);
749 intrpflg = NO;
750 (void) fgets(inbuf, sizeof inbuf, stdin);
751 if ((n = strlen(inbuf)) > 0 && inbuf[n - 1] == '\n')
752 inbuf[n - 1] = '\0';
753 if (intrpflg)
754 inbuf[0] = 'x';
755
756 /*
757 * Handle 'mail' and 'save' here.
758 */
759 if ((inch = inbuf[0]) == 's' || inch == 'm') {
760 if (inbuf[1] == '-')
761 cmsg = prevmsg;
762 else if (isdigit(inbuf[1]))
763 cmsg = atoi(&inbuf[1]);
764 else
765 cmsg = msg;
766 snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, cmsg);
767
768 oldpos = ftello(newmsg);
769
770 cpfrom = fopen(fname, "r");
771 if (!cpfrom) {
772 printf("Message %d not found\n", cmsg);
773 ask (prompt);
774 return;
775 }
776
777 if (inch == 's') {
778 in = nxtfld(inbuf);
779 if (*in) {
780 for (n=0; in[n] > ' '; n++) { /* sizeof fname? */
781 fname[n] = in[n];
782 }
783 fname[n] = '\0';
784 }
785 else
786 strcpy(fname, "Messages");
787 fd = open(fname, O_RDWR|O_EXCL|O_CREAT|O_APPEND);
788 }
789 else {
790 strcpy(fname, _PATH_TMP);
791 fd = mkstemp(fname);
792 if (fd != -1) {
793 snprintf(cmdbuf, sizeof(cmdbuf), _PATH_MAIL,
794 fname);
795 mailing = YES;
796 }
797 }
798 if (fd == -1 || (cpto = fdopen(fd, "a")) == NULL) {
799 if (fd != -1)
800 close(fd);
801 warn("%s", fname);
802 mailing = NO;
803 fseeko(newmsg, oldpos, SEEK_SET);
804 ask(prompt);
805 return;
806 }
807
808 while ((n = fread(inbuf, 1, sizeof inbuf, cpfrom)))
809 fwrite(inbuf, 1, n, cpto);
810
811 fclose(cpfrom);
812 fclose(cpto);
813 fseeko(newmsg, oldpos, SEEK_SET);/* reposition current message */
814 if (inch == 's')
815 printf("Message %d saved in \"%s\"\n", cmsg, fname);
816 else {
817 system(cmdbuf);
818 unlink(fname);
819 mailing = NO;
820 }
821 ask(prompt);
822 }
823 }
824
825 static void
gfrsub(FILE * infile)826 gfrsub(FILE *infile)
827 {
828 off_t frompos;
829 int count;
830
831 seensubj = seenfrom = NO;
832 local = YES;
833 subj[0] = from[0] = date[0] = '\0';
834
835 /*
836 * Is this a normal message?
837 */
838 if (fgets(inbuf, sizeof inbuf, infile)) {
839 if (strncmp(inbuf, "From", 4)==0) {
840 /*
841 * expected form starts with From
842 */
843 seenfrom = YES;
844 frompos = ftello(infile);
845 ptr = from;
846 in = nxtfld(inbuf);
847 if (*in) {
848 count = sizeof(from) - 1;
849 while (*in && *in > ' ' && count-- > 0) {
850 if (*in == ':' || *in == '@' ||
851 *in == '!')
852 local = NO;
853 *ptr++ = *in++;
854 }
855 }
856 *ptr = '\0';
857 if (*(in = nxtfld(in)))
858 strncpy(date, in, sizeof date);
859 else {
860 date[0] = '\n';
861 date[1] = '\0';
862 }
863 }
864 else {
865 /*
866 * not the expected form
867 */
868 rewind(infile);
869 return;
870 }
871 }
872 else
873 /*
874 * empty file ?
875 */
876 return;
877
878 /*
879 * look for Subject line until EOF or a blank line
880 */
881 while (fgets(inbuf, sizeof inbuf, infile)
882 && !(blankline = (inbuf[0] == '\n'))) {
883 /*
884 * extract Subject line
885 */
886 if (!seensubj && strncmp(inbuf, "Subj", 4)==0) {
887 seensubj = YES;
888 frompos = ftello(infile);
889 strncpy(subj, nxtfld(inbuf), sizeof subj);
890 }
891 }
892 if (!blankline)
893 /*
894 * ran into EOF
895 */
896 fseeko(infile, frompos, SEEK_SET);
897
898 if (!seensubj)
899 /*
900 * for possible use with Mail
901 */
902 strncpy(subj, "(No Subject)\n", sizeof subj);
903 }
904
905 static char *
nxtfld(char * s)906 nxtfld(char *s)
907 {
908 if (*s) while (*s && !isspace(*s)) s++; /* skip over this field */
909 if (*s) while (*s && isspace(*s)) s++; /* find start of next field */
910 return (s);
911 }
912