Commit | Line | Data |
---|---|---|
4c2cc009 BJ |
1 | /* |
2 | * msgs - a user bulletin board program | |
3 | * | |
4 | * usage: | |
5 | * msgs [fhlopq] [[-]number] to read messages | |
6 | * msgs -s to place messages | |
7 | * msgs -c [-days] to clean up the bulletin board | |
8 | * | |
9 | * prompt commands are: | |
10 | * y print message | |
11 | * n flush message, go to next message | |
12 | * q flush message, quit | |
13 | * p print message, turn on 'pipe thru more' mode | |
14 | * P print message, turn off 'pipe thru more' mode | |
15 | * - reprint last message | |
16 | * s[-][<num>] [<filename>] save message | |
17 | * m[-][<num>] mail with message in temp mbox | |
18 | * x exit without flushing this message | |
19 | */ | |
20 | ||
21 | #define V7 /* will look for TERM in the environment */ | |
22 | #define OBJECT /* will object to messages without Subjects */ | |
23 | /* #define REJECT /* will reject messages without Subjects | |
24 | (OBJECT must be defined also) */ | |
25 | /* #define UNBUFFERED /* use unbuffered output */ | |
26 | ||
27 | #include <stdio.h> | |
28 | #include <sys/types.h> | |
29 | #include <signal.h> | |
30 | #include <sys/dir.h> | |
31 | #include <sys/stat.h> | |
32 | #include <ctype.h> | |
33 | #include <pwd.h> | |
34 | #include <sgtty.h> | |
35 | #include "msgs.h" | |
36 | ||
37 | #define CMODE 0666 /* bounds file creation mode */ | |
38 | #define NO 0 | |
39 | #define YES 1 | |
40 | #define SUPERUSER 0 /* superuser uid */ | |
41 | #define DAEMON 1 /* daemon uid */ | |
42 | #define NLINES 24 /* default number of lines/crt screen */ | |
43 | #define NDAYS 21 /* default keep time for messages */ | |
44 | #define DAYS *24*60*60 /* seconds/day */ | |
45 | #define TEMP "/tmp/msgXXXXXX" | |
46 | #define MSGSRC ".msgsrc" /* user's rc file */ | |
47 | #define BOUNDS "bounds" /* message bounds file */ | |
48 | #define NEXT "Next message? [yq]" | |
49 | #define MORE "More? [ynq]" | |
50 | #define NOMORE "(No more) [q] ?" | |
51 | ||
52 | typedef char bool; | |
53 | ||
54 | FILE *newmsg; | |
55 | char *sep = "-"; | |
56 | char inbuf[BUFSIZ]; | |
57 | char fname[128]; | |
58 | char cmdbuf[128]; | |
59 | char subj[128]; | |
60 | char from[128]; | |
61 | char date[128]; | |
62 | char *ptr; | |
63 | char *in; | |
64 | bool local; | |
65 | bool ruptible; | |
66 | bool totty; | |
67 | bool seenfrom; | |
68 | bool seensubj; | |
69 | bool blankline; | |
70 | bool printing = NO; | |
71 | bool mailing = NO; | |
72 | bool quitit = NO; | |
73 | bool sending = NO; | |
74 | bool intrpflg = NO; | |
75 | int uid; | |
76 | int msg; | |
77 | int prevmsg; | |
78 | int lct; | |
79 | int nlines; | |
80 | int Lpp = NLINES; | |
81 | time_t t; | |
82 | time_t keep; | |
83 | struct sgttyb otty; | |
84 | ||
85 | char *ctime(); | |
86 | char *nxtfld(); | |
87 | int onintr(); | |
88 | off_t ftell(); | |
89 | FILE *popen(); | |
90 | struct passwd *getpwuid(); | |
91 | ||
92 | extern int errno; | |
93 | ||
94 | /* option initialization */ | |
95 | bool hdrs = NO; | |
96 | bool qopt = NO; | |
97 | bool hush = NO; | |
98 | bool send = NO; | |
99 | bool locomode = NO; | |
100 | bool pause = NO; | |
101 | bool clean = NO; | |
102 | bool lastcmd = NO; | |
103 | ||
104 | main(argc, argv) | |
105 | int argc; char *argv[]; | |
106 | { | |
107 | bool newrc, already; | |
108 | int rcfirst = 0; /* first message to print (from .rc) */ | |
109 | int rcback = 0; /* amount to back off of rcfirst*/ | |
110 | int firstmsg, nextmsg, lastmsg = 0; | |
111 | int blast = 0; | |
112 | FILE *bounds, *msgsrc; | |
113 | ||
114 | #ifndef UNBUFFERED | |
115 | char obuf[BUFSIZ]; | |
116 | setbuf(stdout, obuf); | |
117 | #else | |
118 | setbuf(stdout, NULL); | |
119 | #endif | |
120 | ||
121 | gtty(fileno(stdout), &otty); | |
122 | time(&t); | |
123 | setuid(uid = getuid()); | |
124 | ruptible = (signal(SIGINT, SIG_IGN) == SIG_DFL); | |
125 | if (ruptible) | |
126 | signal(SIGINT, SIG_DFL); | |
127 | ||
128 | argc--, argv++; | |
129 | while (argc > 0) { | |
130 | if (isdigit(argv[0][0])) { /* starting message # */ | |
131 | rcfirst = atoi(argv[0]); | |
132 | } | |
133 | else if (isdigit(argv[0][1])) { /* backward offset */ | |
134 | rcback = atoi( &( argv[0][1] ) ); | |
135 | } | |
136 | else { | |
137 | ptr = *argv; | |
138 | while (*ptr) switch (*ptr++) { | |
139 | ||
140 | case '-': | |
141 | break; | |
142 | ||
143 | case 'c': | |
144 | if (uid != SUPERUSER && uid != DAEMON) { | |
145 | fprintf(stderr, "Sorry\n"); | |
146 | exit(1); | |
147 | } | |
148 | clean = YES; | |
149 | break; | |
150 | ||
151 | case 'f': /* silently */ | |
152 | hush = YES; | |
153 | break; | |
154 | ||
155 | case 'h': /* headers only */ | |
156 | hdrs = YES; | |
157 | break; | |
158 | ||
159 | case 'l': /* local msgs only */ | |
160 | locomode = YES; | |
161 | break; | |
162 | ||
163 | case 'o': /* option to save last message */ | |
164 | lastcmd = YES; | |
165 | break; | |
166 | ||
167 | case 'p': /* pipe thru 'more' during long msgs */ | |
168 | pause = YES; | |
169 | break; | |
170 | ||
171 | case 'q': /* query only */ | |
172 | qopt = YES; | |
173 | break; | |
174 | ||
175 | case 's': /* sending TO msgs */ | |
176 | send = YES; | |
177 | break; | |
178 | ||
179 | default: | |
180 | fprintf(stderr, | |
181 | "usage: msgs [fhlopq] [[-]number]\n"); | |
182 | exit(1); | |
183 | } | |
184 | } | |
185 | argc--, argv++; | |
186 | } | |
187 | ||
188 | /* | |
189 | * determine current message bounds | |
190 | */ | |
191 | sprintf(fname, "%s/%s", USRMSGS, BOUNDS); | |
192 | bounds = fopen(fname, "r"); | |
193 | ||
194 | if (bounds != NULL) { | |
195 | fscanf(bounds, "%d %d\n", &firstmsg, &lastmsg); | |
196 | fclose(bounds); | |
197 | blast = lastmsg; /* save upper bound */ | |
198 | } | |
199 | ||
200 | if (clean) | |
201 | keep = t - (rcback? rcback : NDAYS) DAYS; | |
202 | ||
203 | if (clean || bounds == NULL) { /* relocate message bounds */ | |
204 | struct direct dirent; | |
205 | struct stat stbuf; | |
206 | bool seenany = NO; | |
207 | ||
208 | FILE *d = fopen(USRMSGS, "r"); | |
209 | if (d == NULL) { | |
210 | perror(USRMSGS); | |
211 | exit(errno); | |
212 | } | |
213 | ||
214 | firstmsg = 32767; | |
215 | lastmsg = 0; | |
216 | ||
217 | while (fread(&dirent, sizeof dirent, 1, d) == 1) { | |
218 | register char *cp = dirent.d_name; | |
219 | register int i = 0; | |
220 | ||
221 | if (dirent.d_ino == 0) | |
222 | continue; | |
223 | ||
224 | if (clean) | |
225 | sprintf(inbuf, "%s/%s", USRMSGS, cp); | |
226 | ||
227 | while (isdigit(*cp)) | |
228 | i = i * 10 + *cp++ - '0'; | |
229 | if (*cp) | |
230 | continue; /* not a message! */ | |
231 | ||
232 | if (clean) { | |
233 | if (stat(inbuf, &stbuf) != 0) | |
234 | continue; | |
235 | if (stbuf.st_mtime < keep | |
236 | && stbuf.st_mode&S_IWRITE) { | |
237 | unlink(inbuf); | |
238 | continue; | |
239 | } | |
240 | } | |
241 | ||
242 | if (i > lastmsg) | |
243 | lastmsg = i; | |
244 | if (i < firstmsg) | |
245 | firstmsg = i; | |
246 | seenany = YES; | |
247 | } | |
248 | fclose(d); | |
249 | ||
250 | if (!seenany) { | |
251 | if (blast != 0) /* never lower the upper bound! */ | |
252 | lastmsg = blast; | |
253 | firstmsg = lastmsg + 1; | |
254 | } | |
255 | else if (blast > lastmsg) | |
256 | lastmsg = blast; | |
257 | ||
258 | if (!send) { | |
259 | bounds = fopen(fname, "w"); | |
260 | if (bounds == NULL) { | |
261 | perror(fname); | |
262 | exit(errno); | |
263 | } | |
264 | chmod(fname, CMODE); | |
265 | fprintf(bounds, "%d %d\n", firstmsg, lastmsg); | |
266 | fclose(bounds); | |
267 | } | |
268 | } | |
269 | ||
270 | if (send) { | |
271 | /* | |
272 | * Send mode - place msgs in USRMSGS | |
273 | */ | |
274 | bounds = fopen(fname, "w"); | |
275 | if (bounds == NULL) { | |
276 | perror(fname); | |
277 | exit(errno); | |
278 | } | |
279 | ||
280 | nextmsg = lastmsg + 1; | |
281 | sprintf(fname, "%s/%d", USRMSGS, nextmsg); | |
282 | newmsg = fopen(fname, "w"); | |
283 | if (newmsg == NULL) { | |
284 | perror(fname); | |
285 | exit(errno); | |
286 | } | |
287 | chmod(fname, 0644); | |
288 | ||
289 | fprintf(bounds, "%d %d\n", firstmsg, nextmsg); | |
290 | fclose(bounds); | |
291 | ||
292 | sending = YES; | |
293 | if (ruptible) | |
294 | signal(SIGINT, onintr); | |
295 | ||
296 | if (isatty(fileno(stdin))) { | |
297 | ptr = getpwuid(uid)->pw_name; | |
298 | printf("Message %d:\nFrom %s %sSubject: ", | |
299 | nextmsg, ptr, ctime(&t)); | |
300 | fflush(stdout); | |
301 | fgets(inbuf, sizeof inbuf, stdin); | |
302 | putchar('\n'); | |
303 | fflush(stdout); | |
304 | fprintf(newmsg, "From %s %sSubject: %s\n", | |
305 | ptr, ctime(&t), inbuf); | |
306 | blankline = seensubj = YES; | |
307 | } | |
308 | else | |
309 | blankline = seensubj = NO; | |
310 | for (;;) { | |
311 | fgets(inbuf, sizeof inbuf, stdin); | |
312 | if (feof(stdin) || ferror(stdin)) | |
313 | break; | |
314 | blankline = (blankline || (inbuf[0] == '\n')); | |
315 | seensubj = (seensubj || (!blankline && (strncmp(inbuf, "Subj", 4) == 0))); | |
316 | fputs(inbuf, newmsg); | |
317 | } | |
318 | #ifdef OBJECT | |
319 | if (!seensubj) { | |
320 | printf("NOTICE: Messages should have a Subject field!\n"); | |
321 | #ifdef REJECT | |
322 | unlink(fname); | |
323 | #endif | |
324 | exit(1); | |
325 | } | |
326 | #endif | |
327 | exit(ferror(stdin)); | |
328 | } | |
329 | if (clean) | |
330 | exit(0); | |
331 | ||
332 | /* | |
333 | * prepare to display messages | |
334 | */ | |
335 | totty = (isatty(fileno(stdout)) != 0); | |
336 | pause = pause && totty; | |
337 | ||
338 | sprintf(fname, "%s/%s", getenv("HOME"), MSGSRC); | |
339 | msgsrc = fopen(fname, "r"); | |
340 | if (msgsrc) { | |
341 | newrc = NO; | |
342 | fscanf(msgsrc, "%d\n", &nextmsg); | |
343 | fclose(msgsrc); | |
344 | if (!rcfirst) | |
345 | rcfirst = nextmsg - rcback; | |
346 | } | |
347 | else { | |
348 | newrc = YES; | |
349 | nextmsg = 0; | |
350 | } | |
351 | msgsrc = fopen(fname, "a"); | |
352 | if (msgsrc == NULL) { | |
353 | perror(fname); | |
354 | exit(errno); | |
355 | } | |
356 | if (rcfirst) | |
357 | firstmsg = rcfirst; | |
358 | if (newrc) { | |
359 | nextmsg = firstmsg; | |
360 | fseek(msgsrc, 0L, 0); | |
361 | fprintf(msgsrc, "%d\n", nextmsg); | |
362 | fflush(msgsrc); | |
363 | } | |
364 | ||
365 | #ifdef V7 | |
366 | if (totty) { | |
367 | if (tgetent(inbuf, getenv("TERM")) <= 0 | |
368 | || (Lpp = tgetnum("li")) <= 0) { | |
369 | Lpp = NLINES; | |
370 | } | |
371 | } | |
372 | #endif | |
373 | Lpp -= 6; /* for headers, etc. */ | |
374 | ||
375 | already = NO; | |
376 | prevmsg = firstmsg; | |
377 | printing = YES; | |
378 | if (ruptible) | |
379 | signal(SIGINT, onintr); | |
380 | ||
381 | /* | |
382 | * Main program loop | |
383 | */ | |
384 | for (msg = firstmsg; msg <= lastmsg; msg++) { | |
385 | ||
386 | sprintf(fname, "%s/%d", USRMSGS, msg); | |
387 | newmsg = fopen(fname, "r"); | |
388 | if (newmsg == NULL) | |
389 | continue; | |
390 | ||
391 | gfrsub(newmsg); /* get From and Subject fields */ | |
392 | if (locomode && !local) { | |
393 | fclose(newmsg); | |
394 | continue; | |
395 | } | |
396 | ||
397 | if (qopt) { /* This has to be located here */ | |
398 | printf("There are new messages.\n"); | |
399 | exit(0); | |
400 | } | |
401 | ||
402 | if (already && !hdrs) | |
403 | putchar('\n'); | |
404 | already = YES; | |
405 | ||
406 | /* | |
407 | * Print header | |
408 | */ | |
409 | nlines = 2; | |
410 | if (seenfrom) { | |
411 | printf("Message %d:\nFrom %s %s", msg, from, date); | |
412 | nlines++; | |
413 | } | |
414 | if (seensubj) { | |
415 | printf("Subject: %s", subj); | |
416 | nlines++; | |
417 | } | |
418 | else { | |
419 | if (seenfrom) { | |
420 | putchar('\n'); | |
421 | nlines++; | |
422 | } | |
423 | while (nlines < 6 | |
424 | && fgets(inbuf, sizeof inbuf, newmsg) | |
425 | && inbuf[0] != '\n') { | |
426 | fputs(inbuf, stdout); | |
427 | nlines++; | |
428 | } | |
429 | } | |
430 | ||
431 | lct = linecnt(newmsg); | |
432 | if (lct) | |
433 | printf("(%d%slines) ", lct, seensubj? " " : " more "); | |
434 | ||
435 | if (hdrs) { | |
436 | printf("\n-----\n"); | |
437 | fclose(newmsg); | |
438 | continue; | |
439 | } | |
440 | ||
441 | /* | |
442 | * Ask user for command | |
443 | */ | |
444 | if (totty) | |
445 | ask(lct? MORE : (msg==lastmsg? NOMORE : NEXT)); | |
446 | else | |
447 | inbuf[0] = 'y'; | |
448 | cmnd: | |
449 | in = inbuf; | |
450 | switch (*in) { | |
451 | case 'x': | |
452 | case 'X': | |
453 | exit(0); | |
454 | ||
455 | case 'q': | |
456 | case 'Q': | |
457 | quitit = YES; | |
458 | printf("--Postponed--\n"); | |
459 | exit(0); | |
460 | /* intentional fall-thru */ | |
461 | case 'n': | |
462 | case 'N': | |
463 | if (msg >= nextmsg) sep = "Flushed"; | |
464 | break; | |
465 | ||
466 | case 'p': | |
467 | case 'P': | |
468 | pause = (*in++ == 'p'); | |
469 | /* intentional fallthru */ | |
470 | case '\n': | |
471 | case 'y': | |
472 | default: | |
473 | if (*in == '-') { | |
474 | msg = prevmsg-1; | |
475 | sep = "replay"; | |
476 | break; | |
477 | } | |
478 | if (isdigit(*in)) { | |
479 | msg = next(in); | |
480 | sep = in; | |
481 | break; | |
482 | } | |
483 | ||
484 | prmesg(nlines + lct + (seensubj? 1 : 0)); | |
485 | prevmsg = msg; | |
486 | ||
487 | } | |
488 | ||
489 | printf("--%s--\n", sep); | |
490 | sep = "-"; | |
491 | if (msg >= nextmsg) { | |
492 | nextmsg = msg + 1; | |
493 | fseek(msgsrc, 0L, 0); | |
494 | fprintf(msgsrc, "%d\n", nextmsg); | |
495 | fflush(msgsrc); | |
496 | } | |
497 | if (newmsg) | |
498 | fclose(newmsg); | |
499 | if (quitit) | |
500 | break; | |
501 | } | |
502 | ||
503 | if (already && !quitit && lastcmd && totty) { | |
504 | /* | |
505 | * save or reply to last message? | |
506 | */ | |
507 | msg = prevmsg; | |
508 | ask(NOMORE); | |
509 | if (inbuf[0] == '-' || isdigit(inbuf[0])) | |
510 | goto cmnd; | |
511 | } | |
512 | if (!(already || hush || qopt)) | |
513 | printf("No new messages.\n"); | |
514 | exit(0); | |
515 | } | |
516 | ||
517 | prmesg(length) | |
518 | int length; | |
519 | { | |
520 | FILE *outf, *inf; | |
521 | int c; | |
522 | ||
523 | if (pause && length > Lpp) { | |
524 | sprintf(cmdbuf, PAGE, Lpp); | |
525 | outf = popen(cmdbuf, "w"); | |
526 | if (!outf) | |
527 | outf = stdout; | |
528 | else | |
529 | setbuf(outf, NULL); | |
530 | } | |
531 | else | |
532 | outf = stdout; | |
533 | ||
534 | if (seensubj) | |
535 | putc('\n', outf); | |
536 | ||
537 | while (fgets(inbuf, sizeof inbuf, newmsg)) | |
538 | fputs(inbuf, outf); | |
539 | ||
540 | if (outf != stdout) { | |
541 | pclose(outf); | |
542 | } | |
543 | else { | |
544 | fflush(stdout); | |
545 | } | |
546 | ||
547 | /* trick to force wait on output */ | |
548 | stty(fileno(stdout), &otty); | |
549 | } | |
550 | ||
551 | onintr() | |
552 | { | |
553 | signal(SIGINT, onintr); | |
554 | if (mailing) | |
555 | unlink(fname); | |
556 | if (sending) { | |
557 | unlink(fname); | |
558 | puts("--Killed--"); | |
559 | exit(1); | |
560 | } | |
561 | if (printing) { | |
562 | putchar('\n'); | |
563 | if (hdrs) | |
564 | exit(0); | |
565 | sep = "Interrupt"; | |
566 | if (newmsg) | |
567 | fseek(newmsg, 0L, 2); | |
568 | intrpflg = YES; | |
569 | } | |
570 | } | |
571 | ||
572 | linecnt(f) | |
573 | FILE *f; | |
574 | { | |
575 | off_t oldpos = ftell(f); | |
576 | int l = 0; | |
577 | char lbuf[BUFSIZ]; | |
578 | ||
579 | while (fgets(lbuf, sizeof lbuf, f)) | |
580 | l++; | |
581 | clearerr(f); | |
582 | fseek(f, oldpos, 0); | |
583 | return (l); | |
584 | } | |
585 | ||
586 | next(buf) | |
587 | char *buf; | |
588 | { | |
589 | int i; | |
590 | sscanf(buf, "%d", &i); | |
591 | sprintf(buf, "Goto %d", i); | |
592 | return(--i); | |
593 | } | |
594 | ||
595 | ask(prompt) | |
596 | char *prompt; | |
597 | { | |
598 | char inch; | |
599 | int n, cmsg; | |
600 | off_t oldpos; | |
601 | FILE *cpfrom, *cpto; | |
602 | ||
603 | printf("%s ", prompt); | |
604 | fflush(stdout); | |
605 | intrpflg = NO; | |
606 | gets(inbuf); | |
607 | if (intrpflg) | |
608 | inbuf[0] = 'x'; | |
609 | ||
610 | /* | |
611 | * Handle 'mail' and 'save' here. | |
612 | */ | |
613 | if ((inch = inbuf[0]) == 's' || inch == 'm') { | |
614 | if (inbuf[1] == '-') | |
615 | cmsg = prevmsg; | |
616 | else if (isdigit(inbuf[1])) | |
617 | cmsg = atoi(&inbuf[1]); | |
618 | else | |
619 | cmsg = msg; | |
620 | sprintf(fname, "%s/%d", USRMSGS, cmsg); | |
621 | ||
622 | oldpos = ftell(newmsg); | |
623 | ||
624 | cpfrom = fopen(fname, "r"); | |
625 | if (!cpfrom) { | |
626 | printf("Message %d not found\n", cmsg); | |
627 | ask (prompt); | |
628 | return; | |
629 | } | |
630 | ||
631 | if (inch == 's') { | |
632 | in = nxtfld(inbuf); | |
633 | if (*in) { | |
634 | for (n=0; in[n] > ' '; n++) { /* sizeof fname? */ | |
635 | fname[n] = in[n]; | |
636 | } | |
637 | fname[n] = NULL; | |
638 | } | |
639 | else | |
640 | strcpy(fname, "Messages"); | |
641 | } | |
642 | else { | |
643 | strcpy(fname, TEMP); | |
644 | mktemp(fname); | |
645 | sprintf(cmdbuf, MAIL, fname); | |
646 | mailing = YES; | |
647 | } | |
648 | cpto = fopen(fname, "a"); | |
649 | if (!cpto) { | |
650 | perror(fname); | |
651 | mailing = NO; | |
652 | fseek(newmsg, oldpos, 0); | |
653 | ask(prompt); | |
654 | return; | |
655 | } | |
656 | ||
657 | while (n = fread(inbuf, 1, sizeof inbuf, cpfrom)) | |
658 | fwrite(inbuf, 1, n, cpto); | |
659 | ||
660 | fclose(cpfrom); | |
661 | fclose(cpto); | |
662 | fseek(newmsg, oldpos, 0); /* reposition current message */ | |
663 | if (inch == 's') | |
664 | printf("Message %d saved in \"%s\"\n", cmsg, fname); | |
665 | else { | |
666 | system(cmdbuf); | |
667 | unlink(fname); | |
668 | mailing = NO; | |
669 | } | |
670 | ask(prompt); | |
671 | } | |
672 | } | |
673 | ||
674 | gfrsub(infile) | |
675 | FILE *infile; | |
676 | { | |
677 | off_t frompos; | |
678 | ||
679 | seensubj = seenfrom = NO; | |
680 | local = YES; | |
681 | subj[0] = from[0] = date[0] = NULL; | |
682 | ||
683 | /* | |
684 | * Is this a normal message? | |
685 | */ | |
686 | if (fgets(inbuf, sizeof inbuf, infile)) { | |
687 | if (strncmp(inbuf, "From", 4)==0) { | |
688 | /* | |
689 | * expected form starts with From | |
690 | */ | |
691 | seenfrom = YES; | |
692 | frompos = ftell(infile); | |
693 | ptr = from; | |
694 | in = nxtfld(inbuf); | |
695 | if (*in) while (*in && *in > ' ') { | |
696 | if (*in == ':') | |
697 | local = NO; | |
698 | *ptr++ = *in++; | |
699 | /* what about sizeof from ? */ | |
700 | } | |
701 | *ptr = NULL; | |
702 | if (*(in = nxtfld(in))) | |
703 | strncpy(date, in, sizeof date); | |
704 | else { | |
705 | date[0] = '\n'; | |
706 | date[1] = NULL; | |
707 | } | |
708 | } | |
709 | else { | |
710 | /* | |
711 | * not the expected form | |
712 | */ | |
713 | fseek(infile, 0L, 0); | |
714 | return; | |
715 | } | |
716 | } | |
717 | else | |
718 | /* | |
719 | * empty file ? | |
720 | */ | |
721 | return; | |
722 | ||
723 | /* | |
724 | * look for Subject line until EOF or a blank line | |
725 | */ | |
726 | while (fgets(inbuf, sizeof inbuf, infile) | |
727 | && !(blankline = (inbuf[0] == '\n'))) { | |
728 | /* | |
729 | * extract Subject line | |
730 | */ | |
731 | if (!seensubj && strncmp(inbuf, "Subj", 4)==0) { | |
732 | seensubj = YES; | |
733 | frompos = ftell(infile); | |
734 | strncpy(subj, nxtfld(inbuf), sizeof subj); | |
735 | } | |
736 | } | |
737 | if (!blankline) | |
738 | /* | |
739 | * ran into EOF | |
740 | */ | |
741 | fseek(infile, frompos, 0); | |
742 | ||
743 | if (!seensubj) | |
744 | /* | |
745 | * for possible use with Mail | |
746 | */ | |
747 | strncpy(subj, "(No Subject)\n", sizeof subj); | |
748 | } | |
749 | ||
750 | char * | |
751 | nxtfld(s) | |
752 | char *s; | |
753 | { | |
754 | if (*s) while (*s && *s > ' ') s++; /* skip over this field */ | |
755 | if (*s) while (*s && *s <= ' ') s++; /* find start of next field */ | |
756 | return (s); | |
757 | } |