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1.4 ! deraadt 1: /* $OpenBSD: msgs.c,v 1.3 1996/06/26 05:37:18 deraadt Exp $ */
1.1 deraadt 2: /* $NetBSD: msgs.c,v 1.7 1995/09/28 06:57:40 tls Exp $ */
3:
4: /*-
5: * Copyright (c) 1980, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36:
37: #ifndef lint
38: static char copyright[] =
39: "@(#) Copyright (c) 1980, 1993\n\
40: The Regents of the University of California. All rights reserved.\n";
41: #endif /* not lint */
42:
43: #ifndef lint
44: #if 0
45: static char sccsid[] = "@(#)msgs.c 8.2 (Berkeley) 4/28/95";
46: #else
1.4 ! deraadt 47: static char rcsid[] = "$OpenBSD: msgs.c,v 1.3 1996/06/26 05:37:18 deraadt Exp $";
1.1 deraadt 48: #endif
49: #endif /* not lint */
50:
51: /*
52: * msgs - a user bulletin board program
53: *
54: * usage:
55: * msgs [fhlopqr] [[-]number] to read messages
56: * msgs -s to place messages
57: * msgs -c [-days] to clean up the bulletin board
58: *
59: * prompt commands are:
60: * y print message
61: * n flush message, go to next message
62: * q flush message, quit
63: * p print message, turn on 'pipe thru more' mode
64: * P print message, turn off 'pipe thru more' mode
65: * - reprint last message
66: * s[-][<num>] [<filename>] save message
67: * m[-][<num>] mail with message in temp mbox
68: * x exit without flushing this message
69: * <num> print message number <num>
70: */
71:
72: #define V7 /* will look for TERM in the environment */
73: #define OBJECT /* will object to messages without Subjects */
74: #define REJECT /* will reject messages without Subjects
75: (OBJECT must be defined also) */
76: /* #define UNBUFFERED /* use unbuffered output */
77:
78: #include <sys/param.h>
79: #include <sys/ioctl.h>
1.2 deraadt 80: #include <sys/file.h>
1.1 deraadt 81: #include <sys/stat.h>
82: #include <dirent.h>
83: #include <ctype.h>
84: #include <errno.h>
85: #include <pwd.h>
86: #include <setjmp.h>
87: #include <signal.h>
88: #include <stdio.h>
89: #include <stdlib.h>
90: #include <string.h>
91: #include <termios.h>
92: #include <time.h>
93: #include <unistd.h>
94: #include "pathnames.h"
95:
96: #define CMODE 0664 /* bounds file creation mode */
97: #define NO 0
98: #define YES 1
99: #define SUPERUSER 0 /* superuser uid */
100: #define DAEMON 1 /* daemon uid */
101: #define NLINES 24 /* default number of lines/crt screen */
102: #define NDAYS 21 /* default keep time for messages */
103: #define DAYS *24*60*60 /* seconds/day */
104: #define MSGSRC ".msgsrc" /* user's rc file */
105: #define BOUNDS "bounds" /* message bounds file */
106: #define NEXT "Next message? [yq]"
107: #define MORE "More? [ynq]"
108: #define NOMORE "(No more) [q] ?"
109:
110: typedef char bool;
111:
112: FILE *msgsrc;
113: FILE *newmsg;
114: char *sep = "-";
115: char inbuf[BUFSIZ];
116: char fname[128];
117: char cmdbuf[128];
118: char subj[128];
119: char from[128];
120: char date[128];
121: char *ptr;
122: char *in;
123: bool local;
124: bool ruptible;
125: bool totty;
126: bool seenfrom;
127: bool seensubj;
128: bool blankline;
129: bool printing = NO;
130: bool mailing = NO;
131: bool quitit = NO;
132: bool sending = NO;
133: bool intrpflg = NO;
134: bool restricted = NO;
135: int uid;
136: int msg;
137: int prevmsg;
138: int lct;
139: int nlines;
140: int Lpp = 0;
141: time_t t;
142: time_t keep;
143:
144: char *nxtfld();
145: void onintr();
146: void onsusp();
147:
148: /* option initialization */
149: bool hdrs = NO;
150: bool qopt = NO;
151: bool hush = NO;
152: bool send_msg = NO;
153: bool locomode = NO;
154: bool use_pager = NO;
155: bool clean = NO;
156: bool lastcmd = NO;
157: jmp_buf tstpbuf;
158:
159: main(argc, argv)
160: int argc; char *argv[];
161: {
162: bool newrc, already;
163: int rcfirst = 0; /* first message to print (from .rc) */
164: int rcback = 0; /* amount to back off of rcfirst */
165: int firstmsg, nextmsg, lastmsg = 0;
166: int blast = 0;
167: FILE *bounds;
168:
169: #ifdef UNBUFFERED
170: setbuf(stdout, NULL);
171: #endif
172:
173: time(&t);
174: setuid(uid = getuid());
175: ruptible = (signal(SIGINT, SIG_IGN) == SIG_DFL);
176: if (ruptible)
177: signal(SIGINT, SIG_DFL);
178:
179: argc--, argv++;
180: while (argc > 0) {
181: if (isdigit(argv[0][0])) { /* starting message # */
182: rcfirst = atoi(argv[0]);
183: }
184: else if (isdigit(argv[0][1])) { /* backward offset */
185: rcback = atoi( &( argv[0][1] ) );
186: }
187: else {
188: ptr = *argv;
189: while (*ptr) switch (*ptr++) {
190:
191: case '-':
192: break;
193:
194: case 'c':
195: if (uid != SUPERUSER && uid != DAEMON) {
196: fprintf(stderr, "Sorry\n");
197: exit(1);
198: }
199: clean = YES;
200: break;
201:
202: case 'f': /* silently */
203: hush = YES;
204: break;
205:
206: case 'h': /* headers only */
207: hdrs = YES;
208: break;
209:
210: case 'l': /* local msgs only */
211: locomode = YES;
212: break;
213:
214: case 'o': /* option to save last message */
215: lastcmd = YES;
216: break;
217:
218: case 'p': /* pipe thru 'more' during long msgs */
219: use_pager = YES;
220: break;
221:
222: case 'q': /* query only */
223: qopt = YES;
224: break;
225:
226: case 'r': /* restricted */
227: restricted = YES;
228: break;
229:
230:
231: case 's': /* sending TO msgs */
232: send_msg = YES;
233: break;
234:
235: default:
236: fprintf(stderr,
237: "usage: msgs [fhlopqr] [[-]number]\n");
238: exit(1);
239: }
240: }
241: argc--, argv++;
242: }
243:
244: /*
245: * determine current message bounds
246: */
247: sprintf(fname, "%s/%s", _PATH_MSGS, BOUNDS);
248: bounds = fopen(fname, "r");
249:
250: if (bounds != NULL) {
251: fscanf(bounds, "%d %d\n", &firstmsg, &lastmsg);
252: fclose(bounds);
253: blast = lastmsg; /* save upper bound */
254: }
255:
256: if (clean)
257: keep = t - (rcback? rcback : NDAYS) DAYS;
258:
259: if (clean || bounds == NULL) { /* relocate message bounds */
260: struct dirent *dp;
261: struct stat stbuf;
262: bool seenany = NO;
263: DIR *dirp;
264:
265: dirp = opendir(_PATH_MSGS);
266: if (dirp == NULL) {
267: perror(_PATH_MSGS);
268: exit(errno);
269: }
270: chmod(fname, CMODE);
271:
272: firstmsg = 32767;
273: lastmsg = 0;
274:
275: for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)){
276: register char *cp = dp->d_name;
277: register int i = 0;
278:
279: if (dp->d_ino == 0)
280: continue;
281: if (dp->d_namlen == 0)
282: continue;
283:
284: if (clean)
285: sprintf(inbuf, "%s/%s", _PATH_MSGS, cp);
286:
287: while (isdigit(*cp))
288: i = i * 10 + *cp++ - '0';
289: if (*cp)
290: continue; /* not a message! */
291:
292: if (clean) {
293: if (stat(inbuf, &stbuf) != 0)
294: continue;
295: if (stbuf.st_mtime < keep
296: && stbuf.st_mode&S_IWRITE) {
297: unlink(inbuf);
298: continue;
299: }
300: }
301:
302: if (i > lastmsg)
303: lastmsg = i;
304: if (i < firstmsg)
305: firstmsg = i;
306: seenany = YES;
307: }
308: closedir(dirp);
309:
310: if (!seenany) {
311: if (blast != 0) /* never lower the upper bound! */
312: lastmsg = blast;
313: firstmsg = lastmsg + 1;
314: }
315: else if (blast > lastmsg)
316: lastmsg = blast;
317:
318: if (!send_msg) {
319: bounds = fopen(fname, "w");
320: if (bounds == NULL) {
321: perror(fname);
322: exit(errno);
323: }
324: chmod(fname, CMODE);
325: fprintf(bounds, "%d %d\n", firstmsg, lastmsg);
326: fclose(bounds);
327: }
328: }
329:
330: if (send_msg) {
331: /*
332: * Send mode - place msgs in _PATH_MSGS
333: */
334: bounds = fopen(fname, "w");
335: if (bounds == NULL) {
336: perror(fname);
337: exit(errno);
338: }
339:
340: nextmsg = lastmsg + 1;
341: sprintf(fname, "%s/%d", _PATH_MSGS, nextmsg);
342: newmsg = fopen(fname, "w");
343: if (newmsg == NULL) {
344: perror(fname);
345: exit(errno);
346: }
347: chmod(fname, 0644);
348:
349: fprintf(bounds, "%d %d\n", firstmsg, nextmsg);
350: fclose(bounds);
351:
352: sending = YES;
353: if (ruptible)
354: signal(SIGINT, onintr);
355:
356: if (isatty(fileno(stdin))) {
357: ptr = getpwuid(uid)->pw_name;
358: printf("Message %d:\nFrom %s %sSubject: ",
359: nextmsg, ptr, ctime(&t));
360: fflush(stdout);
361: fgets(inbuf, sizeof inbuf, stdin);
362: putchar('\n');
363: fflush(stdout);
364: fprintf(newmsg, "From %s %sSubject: %s\n",
365: ptr, ctime(&t), inbuf);
366: blankline = seensubj = YES;
367: }
368: else
369: blankline = seensubj = NO;
370: for (;;) {
371: fgets(inbuf, sizeof inbuf, stdin);
372: if (feof(stdin) || ferror(stdin))
373: break;
374: blankline = (blankline || (inbuf[0] == '\n'));
375: seensubj = (seensubj || (!blankline && (strncmp(inbuf, "Subj", 4) == 0)));
376: fputs(inbuf, newmsg);
377: }
378: #ifdef OBJECT
379: if (!seensubj) {
380: printf("NOTICE: Messages should have a Subject field!\n");
381: #ifdef REJECT
382: unlink(fname);
383: #endif
384: exit(1);
385: }
386: #endif
387: exit(ferror(stdin));
388: }
389: if (clean)
390: exit(0);
391:
392: /*
393: * prepare to display messages
394: */
395: totty = (isatty(fileno(stdout)) != 0);
396: use_pager = use_pager && totty;
397:
398: sprintf(fname, "%s/%s", getenv("HOME"), MSGSRC);
399: msgsrc = fopen(fname, "r");
400: if (msgsrc) {
401: newrc = NO;
402: fscanf(msgsrc, "%d\n", &nextmsg);
403: fclose(msgsrc);
404: if (nextmsg > lastmsg+1) {
405: printf("Warning: bounds have been reset (%d, %d)\n",
406: firstmsg, lastmsg);
407: truncate(fname, (off_t)0);
408: newrc = YES;
409: }
410: else if (!rcfirst)
411: rcfirst = nextmsg - rcback;
412: }
413: else
414: newrc = YES;
415: msgsrc = fopen(fname, "r+");
416: if (msgsrc == NULL)
417: msgsrc = fopen(fname, "w");
418: if (msgsrc == NULL) {
419: perror(fname);
420: exit(errno);
421: }
422: if (rcfirst) {
423: if (rcfirst > lastmsg+1) {
424: printf("Warning: the last message is number %d.\n",
425: lastmsg);
426: rcfirst = nextmsg;
427: }
428: if (rcfirst > firstmsg)
429: firstmsg = rcfirst; /* don't set below first msg */
430: }
431: if (newrc) {
432: nextmsg = firstmsg;
433: fseek(msgsrc, 0L, 0);
434: fprintf(msgsrc, "%d\n", nextmsg);
435: fflush(msgsrc);
436: }
437:
438: #ifdef V7
439: if (totty) {
440: struct winsize win;
441: if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1)
442: Lpp = win.ws_row;
443: if (Lpp <= 0) {
444: if (tgetent(inbuf, getenv("TERM")) <= 0
445: || (Lpp = tgetnum("li")) <= 0) {
446: Lpp = NLINES;
447: }
448: }
449: }
450: #endif
451: Lpp -= 6; /* for headers, etc. */
452:
453: already = NO;
454: prevmsg = firstmsg;
455: printing = YES;
456: if (ruptible)
457: signal(SIGINT, onintr);
458:
459: /*
460: * Main program loop
461: */
462: for (msg = firstmsg; msg <= lastmsg; msg++) {
463:
464: sprintf(fname, "%s/%d", _PATH_MSGS, msg);
465: newmsg = fopen(fname, "r");
466: if (newmsg == NULL)
467: continue;
468:
469: gfrsub(newmsg); /* get From and Subject fields */
470: if (locomode && !local) {
471: fclose(newmsg);
472: continue;
473: }
474:
475: if (qopt) { /* This has to be located here */
476: printf("There are new messages.\n");
477: exit(0);
478: }
479:
480: if (already && !hdrs)
481: putchar('\n');
482:
483: /*
484: * Print header
485: */
486: if (totty)
487: signal(SIGTSTP, onsusp);
488: (void) setjmp(tstpbuf);
489: already = YES;
490: nlines = 2;
491: if (seenfrom) {
492: printf("Message %d:\nFrom %s %s", msg, from, date);
493: nlines++;
494: }
495: if (seensubj) {
496: printf("Subject: %s", subj);
497: nlines++;
498: }
499: else {
500: if (seenfrom) {
501: putchar('\n');
502: nlines++;
503: }
504: while (nlines < 6
505: && fgets(inbuf, sizeof inbuf, newmsg)
506: && inbuf[0] != '\n') {
507: fputs(inbuf, stdout);
508: nlines++;
509: }
510: }
511:
512: lct = linecnt(newmsg);
513: if (lct)
514: printf("(%d%slines) ", lct, seensubj? " " : " more ");
515:
516: if (hdrs) {
517: printf("\n-----\n");
518: fclose(newmsg);
519: continue;
520: }
521:
522: /*
523: * Ask user for command
524: */
525: if (totty)
526: ask(lct? MORE : (msg==lastmsg? NOMORE : NEXT));
527: else
528: inbuf[0] = 'y';
529: if (totty)
530: signal(SIGTSTP, SIG_DFL);
531: cmnd:
532: in = inbuf;
533: switch (*in) {
534: case 'x':
535: case 'X':
536: exit(0);
537:
538: case 'q':
539: case 'Q':
540: quitit = YES;
541: printf("--Postponed--\n");
542: exit(0);
543: /* intentional fall-thru */
544: case 'n':
545: case 'N':
546: if (msg >= nextmsg) sep = "Flushed";
547: prevmsg = msg;
548: break;
549:
550: case 'p':
551: case 'P':
552: use_pager = (*in++ == 'p');
553: /* intentional fallthru */
554: case '\n':
555: case 'y':
556: default:
557: if (*in == '-') {
558: msg = prevmsg-1;
559: sep = "replay";
560: break;
561: }
562: if (isdigit(*in)) {
563: msg = next(in);
564: sep = in;
565: break;
566: }
567:
568: prmesg(nlines + lct + (seensubj? 1 : 0));
569: prevmsg = msg;
570:
571: }
572:
573: printf("--%s--\n", sep);
574: sep = "-";
575: if (msg >= nextmsg) {
576: nextmsg = msg + 1;
577: fseek(msgsrc, 0L, 0);
578: fprintf(msgsrc, "%d\n", nextmsg);
579: fflush(msgsrc);
580: }
581: if (newmsg)
582: fclose(newmsg);
583: if (quitit)
584: break;
585: }
586:
587: /*
588: * Make sure .rc file gets updated
589: */
590: if (--msg >= nextmsg) {
591: nextmsg = msg + 1;
592: fseek(msgsrc, 0L, 0);
593: fprintf(msgsrc, "%d\n", nextmsg);
594: fflush(msgsrc);
595: }
596: if (already && !quitit && lastcmd && totty) {
597: /*
598: * save or reply to last message?
599: */
600: msg = prevmsg;
601: ask(NOMORE);
602: if (inbuf[0] == '-' || isdigit(inbuf[0]))
603: goto cmnd;
604: }
605: if (!(already || hush || qopt))
606: printf("No new messages.\n");
607: exit(0);
608: }
609:
610: prmesg(length)
611: int length;
612: {
613: FILE *outf;
614: char *env_pager;
615:
616: if (use_pager && length > Lpp) {
617: signal(SIGPIPE, SIG_IGN);
618: signal(SIGQUIT, SIG_IGN);
619: if ((env_pager = getenv("PAGER")) == NULL) {
620: sprintf(cmdbuf, _PATH_PAGER, Lpp);
621: } else {
622: strcpy(cmdbuf, env_pager);
623: }
624: outf = popen(cmdbuf, "w");
625: if (!outf)
626: outf = stdout;
627: else
628: setbuf(outf, (char *)NULL);
629: }
630: else
631: outf = stdout;
632:
633: if (seensubj)
634: putc('\n', outf);
635:
636: while (fgets(inbuf, sizeof inbuf, newmsg)) {
637: fputs(inbuf, outf);
638: if (ferror(outf)) {
639: clearerr(outf);
640: break;
641: }
642: }
643:
644: if (outf != stdout) {
645: pclose(outf);
646: signal(SIGPIPE, SIG_DFL);
647: signal(SIGQUIT, SIG_DFL);
648: }
649: else {
650: fflush(stdout);
651: }
652:
653: /* trick to force wait on output */
654: tcdrain(fileno(stdout));
655: }
656:
657: void
658: onintr()
659: {
660: signal(SIGINT, onintr);
661: if (mailing)
662: unlink(fname);
663: if (sending) {
664: unlink(fname);
665: puts("--Killed--");
666: exit(1);
667: }
668: if (printing) {
669: putchar('\n');
670: if (hdrs)
671: exit(0);
672: sep = "Interrupt";
673: if (newmsg)
674: fseek(newmsg, 0L, 2);
675: intrpflg = YES;
676: }
677: }
678:
679: /*
680: * We have just gotten a susp. Suspend and prepare to resume.
681: */
682: void
683: onsusp()
684: {
685:
686: signal(SIGTSTP, SIG_DFL);
687: sigsetmask(0);
688: kill(0, SIGTSTP);
689: signal(SIGTSTP, onsusp);
690: if (!mailing)
691: longjmp(tstpbuf, 0);
692: }
693:
694: linecnt(f)
695: FILE *f;
696: {
697: off_t oldpos = ftell(f);
698: int l = 0;
699: char lbuf[BUFSIZ];
700:
701: while (fgets(lbuf, sizeof lbuf, f))
702: l++;
703: clearerr(f);
704: fseek(f, oldpos, 0);
705: return (l);
706: }
707:
708: next(buf)
709: char *buf;
710: {
711: int i;
712: sscanf(buf, "%d", &i);
713: sprintf(buf, "Goto %d", i);
714: return(--i);
715: }
716:
717: ask(prompt)
718: char *prompt;
719: {
720: char inch;
1.2 deraadt 721: int n, cmsg, fd;
1.1 deraadt 722: off_t oldpos;
723: FILE *cpfrom, *cpto;
724:
725: printf("%s ", prompt);
726: fflush(stdout);
727: intrpflg = NO;
728: (void) fgets(inbuf, sizeof inbuf, stdin);
729: if ((n = strlen(inbuf)) > 0 && inbuf[n - 1] == '\n')
730: inbuf[n - 1] = '\0';
731: if (intrpflg)
732: inbuf[0] = 'x';
733:
734: /*
735: * Handle 'mail' and 'save' here.
736: */
737: if (((inch = inbuf[0]) == 's' || inch == 'm') && !restricted) {
738: if (inbuf[1] == '-')
739: cmsg = prevmsg;
740: else if (isdigit(inbuf[1]))
741: cmsg = atoi(&inbuf[1]);
742: else
743: cmsg = msg;
744: sprintf(fname, "%s/%d", _PATH_MSGS, cmsg);
745:
746: oldpos = ftell(newmsg);
747:
748: cpfrom = fopen(fname, "r");
749: if (!cpfrom) {
750: printf("Message %d not found\n", cmsg);
751: ask (prompt);
752: return;
753: }
754:
755: if (inch == 's') {
756: in = nxtfld(inbuf);
757: if (*in) {
758: for (n=0; in[n] > ' '; n++) { /* sizeof fname? */
759: fname[n] = in[n];
760: }
761: fname[n] = NULL;
762: }
763: else
764: strcpy(fname, "Messages");
765: }
766: else {
1.4 ! deraadt 767: strcpy(fname, _PATH_TMPFILE);
1.1 deraadt 768: mktemp(fname);
769: sprintf(cmdbuf, _PATH_MAIL, fname);
770: mailing = YES;
771: }
1.2 deraadt 772: if ((fd = open(fname, O_RDWR|O_EXCL|O_CREAT|O_APPEND)) == -1 ||
773: (cpto = fdopen(fd, "a")) == NULL) {
774: if (fd == -1)
775: close(fd);
1.1 deraadt 776: perror(fname);
777: mailing = NO;
778: fseek(newmsg, oldpos, 0);
779: ask(prompt);
780: return;
781: }
782:
783: while (n = fread(inbuf, 1, sizeof inbuf, cpfrom))
784: fwrite(inbuf, 1, n, cpto);
785:
786: fclose(cpfrom);
787: fclose(cpto);
788: fseek(newmsg, oldpos, 0); /* reposition current message */
789: if (inch == 's')
790: printf("Message %d saved in \"%s\"\n", cmsg, fname);
791: else {
792: system(cmdbuf);
793: unlink(fname);
794: mailing = NO;
795: }
796: ask(prompt);
797: }
798: }
799:
800: gfrsub(infile)
801: FILE *infile;
802: {
803: off_t frompos;
804:
805: seensubj = seenfrom = NO;
806: local = YES;
807: subj[0] = from[0] = date[0] = NULL;
808:
809: /*
810: * Is this a normal message?
811: */
812: if (fgets(inbuf, sizeof inbuf, infile)) {
813: if (strncmp(inbuf, "From", 4)==0) {
814: /*
815: * expected form starts with From
816: */
817: seenfrom = YES;
818: frompos = ftell(infile);
819: ptr = from;
820: in = nxtfld(inbuf);
821: if (*in) while (*in && *in > ' ') {
822: if (*in == ':' || *in == '@' || *in == '!')
823: local = NO;
824: *ptr++ = *in++;
825: /* what about sizeof from ? */
826: }
827: *ptr = NULL;
828: if (*(in = nxtfld(in)))
829: strncpy(date, in, sizeof date);
830: else {
831: date[0] = '\n';
832: date[1] = NULL;
833: }
834: }
835: else {
836: /*
837: * not the expected form
838: */
839: fseek(infile, 0L, 0);
840: return;
841: }
842: }
843: else
844: /*
845: * empty file ?
846: */
847: return;
848:
849: /*
850: * look for Subject line until EOF or a blank line
851: */
852: while (fgets(inbuf, sizeof inbuf, infile)
853: && !(blankline = (inbuf[0] == '\n'))) {
854: /*
855: * extract Subject line
856: */
857: if (!seensubj && strncmp(inbuf, "Subj", 4)==0) {
858: seensubj = YES;
859: frompos = ftell(infile);
860: strncpy(subj, nxtfld(inbuf), sizeof subj);
861: }
862: }
863: if (!blankline)
864: /*
865: * ran into EOF
866: */
867: fseek(infile, frompos, 0);
868:
869: if (!seensubj)
870: /*
871: * for possible use with Mail
872: */
873: strncpy(subj, "(No Subject)\n", sizeof subj);
874: }
875:
876: char *
877: nxtfld(s)
878: char *s;
879: {
880: if (*s) while (*s && *s > ' ') s++; /* skip over this field */
881: if (*s) while (*s && *s <= ' ') s++; /* find start of next field */
882: return (s);
883: }