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