msgs.c revision 6591 
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 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static char copyright[] =
36"@(#) Copyright (c) 1980, 1993\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41static char sccsid[] = "@(#)msgs.c	8.1 (Berkeley) 6/6/93";
42#endif /* not lint */
43
44/*
45 * msgs - a user bulletin board program
46 *
47 * usage:
48 *	msgs [fhlopq] [[-]number]	to read messages
49 *	msgs -s				to place messages
50 *	msgs -c [-days]			to clean up the bulletin board
51 *
52 * prompt commands are:
53 *	y	print message
54 *	n	flush message, go to next message
55 *	q	flush message, quit
56 *	p	print message, turn on 'pipe thru more' mode
57 *	P	print message, turn off 'pipe thru more' mode
58 *	-	reprint last message
59 *	s[-][<num>] [<filename>]	save message
60 *	m[-][<num>]	mail with message in temp mbox
61 *	x	exit without flushing this message
62 *	<num>	print message number <num>
63 */
64
65#define V7		/* will look for TERM in the environment */
66#define OBJECT		/* will object to messages without Subjects */
67/* #define REJECT	/* will reject messages without Subjects
68			   (OBJECT must be defined also) */
69/* #define UNBUFFERED	/* use unbuffered output */
70
71#include <sys/param.h>
72#include <sys/dir.h>
73#include <sys/stat.h>
74#include <ctype.h>
75#include <errno.h>
76#include <pwd.h>
77#include <setjmp.h>
78#include <termios.h>
79#include <signal.h>
80#include <stdio.h>
81#include <stdlib.h>
82#include <string.h>
83#include <time.h>
84#include <unistd.h>
85#include "pathnames.h"
86
87#define CMODE	0666		/* bounds file creation mode */
88#define NO	0
89#define YES	1
90#define SUPERUSER	0	/* superuser uid */
91#define DAEMON		1	/* daemon uid */
92#define NLINES	24		/* default number of lines/crt screen */
93#define NDAYS	21		/* default keep time for messages */
94#define DAYS	*24*60*60	/* seconds/day */
95#define MSGSRC	".msgsrc"	/* user's rc file */
96#define BOUNDS	"bounds"	/* message bounds file */
97#define NEXT	"Next message? [yq]"
98#define MORE	"More? [ynq]"
99#define NOMORE	"(No more) [q] ?"
100
101typedef	char	bool;
102
103FILE	*msgsrc;
104FILE	*newmsg;
105char	*sep = "-";
106char	inbuf[BUFSIZ];
107char	fname[128];
108char	cmdbuf[128];
109char	subj[128];
110char	from[128];
111char	date[128];
112char	*ptr;
113char	*in;
114bool	local;
115bool	ruptible;
116bool	totty;
117bool	seenfrom;
118bool	seensubj;
119bool	blankline;
120bool	printing = NO;
121bool	mailing = NO;
122bool	quitit = NO;
123bool	sending = NO;
124bool	intrpflg = NO;
125int	uid;
126int	msg;
127int	prevmsg;
128int	lct;
129int	nlines;
130int	Lpp = 0;
131time_t	t;
132time_t	keep;
133
134char	*mktemp();
135char	*nxtfld();
136void	onintr();
137void	onsusp();
138
139/* option initialization */
140bool	hdrs = NO;
141bool	qopt = NO;
142bool	hush = NO;
143bool	send_msg = NO;
144bool	locomode = NO;
145bool	use_pager = NO;
146bool	clean = NO;
147bool	lastcmd = NO;
148jmp_buf	tstpbuf;
149
150main(argc, argv)
151int argc; char *argv[];
152{
153	bool newrc, already;
154	int rcfirst = 0;		/* first message to print (from .rc) */
155	int rcback = 0;			/* amount to back off of rcfirst */
156	int firstmsg, nextmsg, lastmsg = 0;
157	int blast = 0;
158	FILE *bounds;
159
160#ifdef UNBUFFERED
161	setbuf(stdout, NULL);
162#endif
163
164
165	time(&t);
166	setuid(uid = getuid());
167	ruptible = (signal(SIGINT, SIG_IGN) == SIG_DFL);
168	if (ruptible)
169		signal(SIGINT, SIG_DFL);
170
171	argc--, argv++;
172	while (argc > 0) {
173		if (isdigit(argv[0][0])) {	/* starting message # */
174			rcfirst = atoi(argv[0]);
175		}
176		else if (isdigit(argv[0][1])) {	/* backward offset */
177			rcback = atoi( &( argv[0][1] ) );
178		}
179		else {
180			ptr = *argv;
181			while (*ptr) switch (*ptr++) {
182
183			case '-':
184				break;
185
186			case 'c':
187				if (uid != SUPERUSER && uid != DAEMON) {
188					fprintf(stderr, "Sorry\n");
189					exit(1);
190				}
191				clean = YES;
192				break;
193
194			case 'f':		/* silently */
195				hush = YES;
196				break;
197
198			case 'h':		/* headers only */
199				hdrs = YES;
200				break;
201
202			case 'l':		/* local msgs only */
203				locomode = YES;
204				break;
205
206			case 'o':		/* option to save last message */
207				lastcmd = YES;
208				break;
209
210			case 'p':		/* pipe thru 'more' during long msgs */
211				use_pager = YES;
212				break;
213
214			case 'q':		/* query only */
215				qopt = YES;
216				break;
217
218			case 's':		/* sending TO msgs */
219				send_msg = YES;
220				break;
221
222			default:
223				fprintf(stderr,
224					"usage: msgs [fhlopq] [[-]number]\n");
225				exit(1);
226			}
227		}
228		argc--, argv++;
229	}
230
231	/*
232	 * determine current message bounds
233	 */
234	sprintf(fname, "%s/%s", _PATH_MSGS, BOUNDS);
235	bounds = fopen(fname, "r");
236
237	if (bounds != NULL) {
238		fscanf(bounds, "%d %d\n", &firstmsg, &lastmsg);
239		fclose(bounds);
240		blast = lastmsg;	/* save upper bound */
241	}
242
243	if (clean)
244		keep = t - (rcback? rcback : NDAYS) DAYS;
245
246	if (clean || bounds == NULL) {	/* relocate message bounds */
247		struct direct *dp;
248		struct stat stbuf;
249		bool seenany = NO;
250		DIR	*dirp;
251
252		dirp = opendir(_PATH_MSGS);
253		if (dirp == NULL) {
254			perror(_PATH_MSGS);
255			exit(errno);
256		}
257
258		firstmsg = 32767;
259		lastmsg = 0;
260
261		for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)){
262			register char *cp = dp->d_name;
263			register int i = 0;
264
265			if (dp->d_ino == 0)
266				continue;
267			if (dp->d_namlen == 0)
268				continue;
269
270			if (clean)
271				sprintf(inbuf, "%s/%s", _PATH_MSGS, cp);
272
273			while (isdigit(*cp))
274				i = i * 10 + *cp++ - '0';
275			if (*cp)
276				continue;	/* not a message! */
277
278			if (clean) {
279				if (stat(inbuf, &stbuf) != 0)
280					continue;
281				if (stbuf.st_mtime < keep
282				    && stbuf.st_mode&S_IWRITE) {
283					unlink(inbuf);
284					continue;
285				}
286			}
287
288			if (i > lastmsg)
289				lastmsg = i;
290			if (i < firstmsg)
291				firstmsg = i;
292			seenany = YES;
293		}
294		closedir(dirp);
295
296		if (!seenany) {
297			if (blast != 0)	/* never lower the upper bound! */
298				lastmsg = blast;
299			firstmsg = lastmsg + 1;
300		}
301		else if (blast > lastmsg)
302			lastmsg = blast;
303
304		if (!send_msg) {
305			bounds = fopen(fname, "w");
306			if (bounds == NULL) {
307				perror(fname);
308				exit(errno);
309			}
310			chmod(fname, CMODE);
311			fprintf(bounds, "%d %d\n", firstmsg, lastmsg);
312			fclose(bounds);
313		}
314	}
315
316	if (send_msg) {
317		/*
318		 * Send mode - place msgs in _PATH_MSGS
319		 */
320		bounds = fopen(fname, "w");
321		if (bounds == NULL) {
322			perror(fname);
323			exit(errno);
324		}
325
326		nextmsg = lastmsg + 1;
327		sprintf(fname, "%s/%d", _PATH_MSGS, nextmsg);
328		newmsg = fopen(fname, "w");
329		if (newmsg == NULL) {
330			perror(fname);
331			exit(errno);
332		}
333		chmod(fname, 0644);
334
335		fprintf(bounds, "%d %d\n", firstmsg, nextmsg);
336		fclose(bounds);
337
338		sending = YES;
339		if (ruptible)
340			signal(SIGINT, onintr);
341
342		if (isatty(fileno(stdin))) {
343			ptr = getpwuid(uid)->pw_name;
344			printf("Message %d:\nFrom %s %sSubject: ",
345				nextmsg, ptr, ctime(&t));
346			fflush(stdout);
347			fgets(inbuf, sizeof inbuf, stdin);
348			putchar('\n');
349			fflush(stdout);
350			fprintf(newmsg, "From %s %sSubject: %s\n",
351				ptr, ctime(&t), inbuf);
352			blankline = seensubj = YES;
353		}
354		else
355			blankline = seensubj = NO;
356		for (;;) {
357			fgets(inbuf, sizeof inbuf, stdin);
358			if (feof(stdin) || ferror(stdin))
359				break;
360			blankline = (blankline || (inbuf[0] == '\n'));
361			seensubj = (seensubj || (!blankline && (strncmp(inbuf, "Subj", 4) == 0)));
362			fputs(inbuf, newmsg);
363		}
364#ifdef OBJECT
365		if (!seensubj) {
366			printf("NOTICE: Messages should have a Subject field!\n");
367#ifdef REJECT
368			unlink(fname);
369#endif
370			exit(1);
371		}
372#endif
373		exit(ferror(stdin));
374	}
375	if (clean)
376		exit(0);
377
378	/*
379	 * prepare to display messages
380	 */
381	totty = (isatty(fileno(stdout)) != 0);
382	use_pager = use_pager && totty;
383
384	sprintf(fname, "%s/%s", getenv("HOME"), MSGSRC);
385	msgsrc = fopen(fname, "r");
386	if (msgsrc) {
387		newrc = NO;
388		fscanf(msgsrc, "%d\n", &nextmsg);
389		fclose(msgsrc);
390		if (nextmsg > lastmsg+1) {
391			printf("Warning: bounds have been reset (%d, %d)\n",
392				firstmsg, lastmsg);
393			truncate(fname, (off_t)0);
394			newrc = YES;
395		}
396		else if (!rcfirst)
397			rcfirst = nextmsg - rcback;
398	}
399	else
400		newrc = YES;
401	msgsrc = fopen(fname, "r+");
402	if (msgsrc == NULL)
403		msgsrc = fopen(fname, "w");
404	if (msgsrc == NULL) {
405		perror(fname);
406		exit(errno);
407	}
408	if (rcfirst) {
409		if (rcfirst > lastmsg+1) {
410			printf("Warning: the last message is number %d.\n",
411				lastmsg);
412			rcfirst = nextmsg;
413		}
414		if (rcfirst > firstmsg)
415			firstmsg = rcfirst;	/* don't set below first msg */
416	}
417	if (newrc) {
418		nextmsg = firstmsg;
419		fseek(msgsrc, 0L, 0);
420		fprintf(msgsrc, "%d\n", nextmsg);
421		fflush(msgsrc);
422	}
423
424#ifdef V7
425	if (totty) {
426		struct winsize win;
427		if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1)
428			Lpp = win.ws_row;
429		if (Lpp <= 0) {
430			if (tgetent(inbuf, getenv("TERM")) <= 0
431			    || (Lpp = tgetnum("li")) <= 0) {
432				Lpp = NLINES;
433			}
434		}
435	}
436#endif
437	Lpp -= 6;	/* for headers, etc. */
438
439	already = NO;
440	prevmsg = firstmsg;
441	printing = YES;
442	if (ruptible)
443		signal(SIGINT, onintr);
444
445	/*
446	 * Main program loop
447	 */
448	for (msg = firstmsg; msg <= lastmsg; msg++) {
449
450		sprintf(fname, "%s/%d", _PATH_MSGS, msg);
451		newmsg = fopen(fname, "r");
452		if (newmsg == NULL)
453			continue;
454
455		gfrsub(newmsg);		/* get From and Subject fields */
456		if (locomode && !local) {
457			fclose(newmsg);
458			continue;
459		}
460
461		if (qopt) {	/* This has to be located here */
462			printf("There are new messages.\n");
463			exit(0);
464		}
465
466		if (already && !hdrs)
467			putchar('\n');
468
469		/*
470		 * Print header
471		 */
472		if (totty)
473			signal(SIGTSTP, onsusp);
474		(void) setjmp(tstpbuf);
475		already = YES;
476		nlines = 2;
477		if (seenfrom) {
478			printf("Message %d:\nFrom %s %s", msg, from, date);
479			nlines++;
480		}
481		if (seensubj) {
482			printf("Subject: %s", subj);
483			nlines++;
484		}
485		else {
486			if (seenfrom) {
487				putchar('\n');
488				nlines++;
489			}
490			while (nlines < 6
491			    && fgets(inbuf, sizeof inbuf, newmsg)
492			    && inbuf[0] != '\n') {
493				fputs(inbuf, stdout);
494				nlines++;
495			}
496		}
497
498		lct = linecnt(newmsg);
499		if (lct)
500			printf("(%d%slines) ", lct, seensubj? " " : " more ");
501
502		if (hdrs) {
503			printf("\n-----\n");
504			fclose(newmsg);
505			continue;
506		}
507
508		/*
509		 * Ask user for command
510		 */
511		if (totty)
512			ask(lct? MORE : (msg==lastmsg? NOMORE : NEXT));
513		else
514			inbuf[0] = 'y';
515		if (totty)
516			signal(SIGTSTP, SIG_DFL);
517cmnd:
518		in = inbuf;
519		switch (*in) {
520			case 'x':
521			case 'X':
522				exit(0);
523
524			case 'q':
525			case 'Q':
526				quitit = YES;
527				printf("--Postponed--\n");
528				exit(0);
529				/* intentional fall-thru */
530			case 'n':
531			case 'N':
532				if (msg >= nextmsg) sep = "Flushed";
533				prevmsg = msg;
534				break;
535
536			case 'p':
537			case 'P':
538				use_pager = (*in++ == 'p');
539				/* intentional fallthru */
540			case '\n':
541			case 'y':
542			default:
543				if (*in == '-') {
544					msg = prevmsg-1;
545					sep = "replay";
546					break;
547				}
548				if (isdigit(*in)) {
549					msg = next(in);
550					sep = in;
551					break;
552				}
553
554				prmesg(nlines + lct + (seensubj? 1 : 0));
555				prevmsg = msg;
556
557		}
558
559		printf("--%s--\n", sep);
560		sep = "-";
561		if (msg >= nextmsg) {
562			nextmsg = msg + 1;
563			fseek(msgsrc, 0L, 0);
564			fprintf(msgsrc, "%d\n", nextmsg);
565			fflush(msgsrc);
566		}
567		if (newmsg)
568			fclose(newmsg);
569		if (quitit)
570			break;
571	}
572
573	/*
574	 * Make sure .rc file gets updated
575	 */
576	if (--msg >= nextmsg) {
577		nextmsg = msg + 1;
578		fseek(msgsrc, 0L, 0);
579		fprintf(msgsrc, "%d\n", nextmsg);
580		fflush(msgsrc);
581	}
582	if (already && !quitit && lastcmd && totty) {
583		/*
584		 * save or reply to last message?
585		 */
586		msg = prevmsg;
587		ask(NOMORE);
588		if (inbuf[0] == '-' || isdigit(inbuf[0]))
589			goto cmnd;
590	}
591	if (!(already || hush || qopt))
592		printf("No new messages.\n");
593	exit(0);
594}
595
596prmesg(length)
597int length;
598{
599	FILE *outf;
600
601	if (use_pager && length > Lpp) {
602		signal(SIGPIPE, SIG_IGN);
603		signal(SIGQUIT, SIG_IGN);
604		sprintf(cmdbuf, _PATH_PAGER, Lpp);
605		outf = popen(cmdbuf, "w");
606		if (!outf)
607			outf = stdout;
608		else
609			setbuf(outf, (char *)NULL);
610	}
611	else
612		outf = stdout;
613
614	if (seensubj)
615		putc('\n', outf);
616
617	while (fgets(inbuf, sizeof inbuf, newmsg)) {
618		fputs(inbuf, outf);
619		if (ferror(outf)) {
620			clearerr(outf);
621			break;
622		}
623	}
624
625	if (outf != stdout) {
626		pclose(outf);
627		signal(SIGPIPE, SIG_DFL);
628		signal(SIGQUIT, SIG_DFL);
629	}
630	else {
631		fflush(stdout);
632	}
633
634	/* force wait on output */
635	tcdrain(fileno(stdout));
636}
637
638void
639onintr()
640{
641	signal(SIGINT, onintr);
642	if (mailing)
643		unlink(fname);
644	if (sending) {
645		unlink(fname);
646		puts("--Killed--");
647		exit(1);
648	}
649	if (printing) {
650		putchar('\n');
651		if (hdrs)
652			exit(0);
653		sep = "Interrupt";
654		if (newmsg)
655			fseek(newmsg, 0L, 2);
656		intrpflg = YES;
657	}
658}
659
660/*
661 * We have just gotten a susp.  Suspend and prepare to resume.
662 */
663void
664onsusp()
665{
666
667	signal(SIGTSTP, SIG_DFL);
668	sigsetmask(0);
669	kill(0, SIGTSTP);
670	signal(SIGTSTP, onsusp);
671	if (!mailing)
672		longjmp(tstpbuf, 0);
673}
674
675linecnt(f)
676FILE *f;
677{
678	off_t oldpos = ftell(f);
679	int l = 0;
680	char lbuf[BUFSIZ];
681
682	while (fgets(lbuf, sizeof lbuf, f))
683		l++;
684	clearerr(f);
685	fseek(f, oldpos, 0);
686	return (l);
687}
688
689next(buf)
690char *buf;
691{
692	int i;
693	sscanf(buf, "%d", &i);
694	sprintf(buf, "Goto %d", i);
695	return(--i);
696}
697
698ask(prompt)
699char *prompt;
700{
701	char	inch;
702	int	n, cmsg;
703	off_t	oldpos;
704	FILE	*cpfrom, *cpto;
705
706	printf("%s ", prompt);
707	fflush(stdout);
708	intrpflg = NO;
709	(void) fgets(inbuf, sizeof inbuf, stdin);
710	if ((n = strlen(inbuf)) > 0 && inbuf[n - 1] == '\n')
711		inbuf[n - 1] = '\0';
712	if (intrpflg)
713		inbuf[0] = 'x';
714
715	/*
716	 * Handle 'mail' and 'save' here.
717	 */
718	if ((inch = inbuf[0]) == 's' || inch == 'm') {
719		if (inbuf[1] == '-')
720			cmsg = prevmsg;
721		else if (isdigit(inbuf[1]))
722			cmsg = atoi(&inbuf[1]);
723		else
724			cmsg = msg;
725		sprintf(fname, "%s/%d", _PATH_MSGS, cmsg);
726
727		oldpos = ftell(newmsg);
728
729		cpfrom = fopen(fname, "r");
730		if (!cpfrom) {
731			printf("Message %d not found\n", cmsg);
732			ask (prompt);
733			return;
734		}
735
736		if (inch == 's') {
737			in = nxtfld(inbuf);
738			if (*in) {
739				for (n=0; in[n] > ' '; n++) { /* sizeof fname? */
740					fname[n] = in[n];
741				}
742				fname[n] = NULL;
743			}
744			else
745				strcpy(fname, "Messages");
746		}
747		else {
748			strcpy(fname, _PATH_TMP);
749			mktemp(fname);
750			sprintf(cmdbuf, _PATH_MAIL, fname);
751			mailing = YES;
752		}
753		cpto = fopen(fname, "a");
754		if (!cpto) {
755			perror(fname);
756			mailing = NO;
757			fseek(newmsg, oldpos, 0);
758			ask(prompt);
759			return;
760		}
761
762		while (n = fread(inbuf, 1, sizeof inbuf, cpfrom))
763			fwrite(inbuf, 1, n, cpto);
764
765		fclose(cpfrom);
766		fclose(cpto);
767		fseek(newmsg, oldpos, 0);	/* reposition current message */
768		if (inch == 's')
769			printf("Message %d saved in \"%s\"\n", cmsg, fname);
770		else {
771			system(cmdbuf);
772			unlink(fname);
773			mailing = NO;
774		}
775		ask(prompt);
776	}
777}
778
779gfrsub(infile)
780FILE *infile;
781{
782	off_t frompos;
783
784	seensubj = seenfrom = NO;
785	local = YES;
786	subj[0] = from[0] = date[0] = NULL;
787
788	/*
789	 * Is this a normal message?
790	 */
791	if (fgets(inbuf, sizeof inbuf, infile)) {
792		if (strncmp(inbuf, "From", 4)==0) {
793			/*
794			 * expected form starts with From
795			 */
796			seenfrom = YES;
797			frompos = ftell(infile);
798			ptr = from;
799			in = nxtfld(inbuf);
800			if (*in) while (*in && *in > ' ') {
801				if (*in == ':' || *in == '@' || *in == '!')
802					local = NO;
803				*ptr++ = *in++;
804				/* what about sizeof from ? */
805			}
806			*ptr = NULL;
807			if (*(in = nxtfld(in)))
808				strncpy(date, in, sizeof date);
809			else {
810				date[0] = '\n';
811				date[1] = NULL;
812			}
813		}
814		else {
815			/*
816			 * not the expected form
817			 */
818			fseek(infile, 0L, 0);
819			return;
820		}
821	}
822	else
823		/*
824		 * empty file ?
825		 */
826		return;
827
828	/*
829	 * look for Subject line until EOF or a blank line
830	 */
831	while (fgets(inbuf, sizeof inbuf, infile)
832	    && !(blankline = (inbuf[0] == '\n'))) {
833		/*
834		 * extract Subject line
835		 */
836		if (!seensubj && strncmp(inbuf, "Subj", 4)==0) {
837			seensubj = YES;
838			frompos = ftell(infile);
839			strncpy(subj, nxtfld(inbuf), sizeof subj);
840		}
841	}
842	if (!blankline)
843		/*
844		 * ran into EOF
845		 */
846		fseek(infile, frompos, 0);
847
848	if (!seensubj)
849		/*
850		 * for possible use with Mail
851		 */
852		strncpy(subj, "(No Subject)\n", sizeof subj);
853}
854
855char *
856nxtfld(s)
857char *s;
858{
859	if (*s) while (*s && *s > ' ') s++;	/* skip over this field */
860	if (*s) while (*s && *s <= ' ') s++;	/* find start of next field */
861	return (s);
862}
863