cmd1.c revision 1.22 
1/*	$OpenBSD: cmd1.c,v 1.22 2001/11/21 20:41:55 millert Exp $	*/
2/*	$NetBSD: cmd1.c,v 1.9 1997/07/09 05:29:48 mikel 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#if 0
39static const char sccsid[] = "@(#)cmd1.c	8.2 (Berkeley) 4/20/95";
40#else
41static const char rcsid[] = "$OpenBSD: cmd1.c,v 1.22 2001/11/21 20:41:55 millert Exp $";
42#endif
43#endif /* not lint */
44
45#include "rcv.h"
46#include "extern.h"
47
48/*
49 * Mail -- a mail program
50 *
51 * User commands.
52 */
53
54/*
55 * Print the current active headings.
56 * Don't change dot if invoker didn't give an argument.
57 */
58
59static int screen;
60static volatile sig_atomic_t gothdrint;
61
62int
63headers(void *v)
64{
65	int *msgvec = v;
66	int n, mesg, flag, size;
67	struct message *mp;
68	struct sigaction act, oact;
69	sigset_t oset;
70
71	size = screensize();
72	n = msgvec[0];
73	if (n != 0)
74		screen = (n-1)/size;
75	if (screen < 0)
76		screen = 0;
77	mp = &message[screen * size];
78	if (mp >= &message[msgCount])
79		mp = &message[msgCount - size];
80	if (mp < &message[0])
81		mp = &message[0];
82	flag = 0;
83	mesg = mp - &message[0];
84	if (dot != &message[n-1])
85		dot = mp;
86	sigemptyset(&act.sa_mask);
87	act.sa_flags = SA_RESTART;
88	act.sa_handler = hdrint;
89	if (sigaction(SIGINT, NULL, &oact) == 0 &&
90	    oact.sa_handler != SIG_IGN) {
91		(void)sigaction(SIGINT, &act, &oact);
92		(void)sigprocmask(SIG_UNBLOCK, &intset, &oset);
93	}
94	for (gothdrint = 0; !gothdrint && mp < &message[msgCount]; mp++) {
95		mesg++;
96		if (mp->m_flag & MDELETED)
97			continue;
98		if (flag++ >= size)
99			break;
100		printhead(mesg);
101	}
102	if (gothdrint) {
103		fflush(stdout);
104		fputs("\nInterrupt\n", stderr);
105	}
106	if (oact.sa_handler != SIG_IGN) {
107		(void)sigprocmask(SIG_SETMASK, &oset, NULL);
108		(void)sigaction(SIGINT, &oact, NULL);
109	}
110	if (flag == 0) {
111		puts("No more mail.");
112		return(1);
113	}
114	return(0);
115}
116
117/*
118 * Scroll to the next/previous screen
119 */
120int
121scroll(void *v)
122{
123	char *arg = v;
124	int size, maxscreen;
125	int cur[1];
126
127	cur[0] = 0;
128	size = screensize();
129	maxscreen = (msgCount - 1) / size;
130	switch (*arg) {
131	case 0:
132	case '+':
133		if (screen >= maxscreen) {
134			puts("On last screenful of messages");
135			return(0);
136		}
137		screen++;
138		break;
139
140	case '-':
141		if (screen <= 0) {
142			puts("On first screenful of messages");
143			return(0);
144		}
145		screen--;
146		break;
147
148	default:
149		printf("Unrecognized scrolling command \"%s\"\n", arg);
150		return(1);
151	}
152	return(headers(cur));
153}
154
155/*
156 * Compute screen size.
157 */
158int
159screensize(void)
160{
161	int s;
162	char *cp;
163
164	if ((cp = value("screen")) != NULL && (s = atoi(cp)) > 0)
165		return(s);
166	return(screenheight - 4);
167}
168
169/*
170 * Print out the headlines for each message
171 * in the passed message list.
172 */
173int
174from(void *v)
175{
176	int *msgvec = v;
177	int *ip;
178
179	for (ip = msgvec; *ip != NULL; ip++)
180		printhead(*ip);
181	if (--ip >= msgvec)
182		dot = &message[*ip - 1];
183	return(0);
184}
185
186/*
187 * Print out the header of a specific message.
188 * This is a slight improvement to the standard one.
189 */
190void
191printhead(int mesg)
192{
193	struct message *mp;
194	char headline[LINESIZE], wcount[LINESIZE], *subjline, dispc, curind;
195	char pbuf[BUFSIZ];
196	struct headline hl;
197	int subjlen;
198	char *name;
199	char *to, *from;
200	struct name *np;
201	char **ap;
202
203	mp = &message[mesg-1];
204	(void)readline(setinput(mp), headline, LINESIZE, NULL);
205	if ((subjline = hfield("subject", mp)) == NULL)
206		subjline = hfield("subj", mp);
207	/*
208	 * Bletch!
209	 */
210	curind = dot == mp ? '>' : ' ';
211	dispc = ' ';
212	if (mp->m_flag & MSAVED)
213		dispc = '*';
214	if (mp->m_flag & MPRESERVE)
215		dispc = 'P';
216	if ((mp->m_flag & (MREAD|MNEW)) == MNEW)
217		dispc = 'N';
218	if ((mp->m_flag & (MREAD|MNEW)) == 0)
219		dispc = 'U';
220	if (mp->m_flag & MBOX)
221		dispc = 'M';
222	parse(headline, &hl, pbuf);
223	(void)snprintf(wcount, sizeof(wcount), "%4d/%-5d", mp->m_lines,
224	    mp->m_size);
225	subjlen = screenwidth - 44 - strlen(wcount);
226	from = nameof(mp, 0);
227	to = skin(hfield("to", mp));
228	np = extract(from, GTO);
229	np = delname(np, myname);
230	if (altnames)
231		for (ap = altnames; *ap; ap++)
232			np = delname(np, *ap);
233	if (np)
234		/* not from me */
235		name = value("show-rcpt") != NULL && to ? to : from;
236	else
237		/* from me - show TO */
238		name = value("showto") != NULL && to ? to : from;
239	if (subjline == NULL || subjlen < 0) { /* pretty pathetic */
240		subjline="";
241		subjlen=0;
242	}
243	if (name == to)
244		printf("%c%c%3d TO %-14.14s  %16.16s %s %.*s\n",
245			curind, dispc, mesg, name, hl.l_date, wcount,
246			subjlen, subjline);
247	else
248		printf("%c%c%3d %-17.17s  %16.16s %s %.*s\n",
249			curind, dispc, mesg, name, hl.l_date, wcount,
250			subjlen, subjline);
251}
252
253/*
254 * Print out the value of dot.
255 */
256int
257pdot(void *v)
258{
259	printf("%d\n", (int)(dot - &message[0] + 1));
260	return(0);
261}
262
263/*
264 * Print out all the possible commands.
265 */
266int
267pcmdlist(void *v)
268{
269	extern const struct cmd cmdtab[];
270	const struct cmd *cp;
271	int cc;
272
273	puts("Commands are:");
274	for (cc = 0, cp = cmdtab; cp->c_name != NULL; cp++) {
275		cc += strlen(cp->c_name) + 2;
276		if (cc > 72) {
277			putchar('\n');
278			cc = strlen(cp->c_name) + 2;
279		}
280		if ((cp+1)->c_name != NULL)
281			printf("%s, ", cp->c_name);
282		else
283			puts(cp->c_name);
284	}
285	return(0);
286}
287
288/*
289 * Pipe message to command
290 */
291int
292pipeit(void *ml, void *sl)
293{
294	int  *msgvec = ml;
295	char *cmd    = sl;
296
297	return(type1(msgvec, cmd, 0, 0));
298}
299
300/*
301 * Paginate messages, honor ignored fields.
302 */
303int
304more(void *v)
305{
306	int *msgvec = v;
307	return(type1(msgvec, NULL, 1, 1));
308}
309
310/*
311 * Paginate messages, even printing ignored fields.
312 */
313int
314More(void *v)
315{
316	int *msgvec = v;
317
318	return(type1(msgvec, NULL, 0, 1));
319}
320
321/*
322 * Type out messages, honor ignored fields.
323 */
324int
325type(void *v)
326{
327	int *msgvec = v;
328
329	return(type1(msgvec, NULL, 1, 0));
330}
331
332/*
333 * Type out messages, even printing ignored fields.
334 */
335int
336Type(void *v)
337{
338	int *msgvec = v;
339
340	return(type1(msgvec, NULL, 0, 0));
341}
342
343/*
344 * Type out the messages requested.
345 */
346int
347type1(int *msgvec, char *cmd, int doign, int page)
348{
349	int nlines, *ip, restoreterm;
350	struct message *mp;
351	struct termios tbuf;
352	char *cp;
353	FILE *obuf;
354
355	obuf = stdout;
356	restoreterm = 0;
357
358	/*
359	 * start a pipe if needed.
360	 */
361	if (cmd) {
362		restoreterm = (tcgetattr(fileno(stdin), &tbuf) == 0);
363		obuf = Popen(cmd, "w");
364		if (obuf == NULL) {
365			warn("%s", cmd);
366			obuf = stdout;
367		}
368	} else if (value("interactive") != NULL &&
369	         (page || (cp = value("crt")) != NULL)) {
370		nlines = 0;
371		if (!page) {
372			for (ip = msgvec; *ip && ip-msgvec < msgCount; ip++)
373				nlines += message[*ip - 1].m_lines;
374		}
375		if (page || nlines > (*cp ? atoi(cp) : realscreenheight)) {
376			restoreterm = (tcgetattr(fileno(stdin), &tbuf) == 0);
377			obuf = Popen(value("PAGER"), "w");
378			if (obuf == NULL) {
379				warn("%s", cp);
380				obuf = stdout;
381			}
382		}
383	}
384
385	/*
386	 * Send messages to the output.
387	 */
388	for (ip = msgvec; *ip && ip - msgvec < msgCount; ip++) {
389		mp = &message[*ip - 1];
390		touch(mp);
391		dot = mp;
392		if (cmd == NULL && value("quiet") == NULL)
393			fprintf(obuf, "Message %d:\n", *ip);
394		if (sendmessage(mp, obuf, doign ? ignore : 0, NULL) == -1)
395			break;
396	}
397
398	if (obuf != stdout) {
399		(void)Pclose(obuf);
400		if (restoreterm)
401			(void)tcsetattr(fileno(stdin), TCSADRAIN, &tbuf);
402	}
403	return(0);
404}
405
406/*
407 * Print the top so many lines of each desired message.
408 * The number of lines is taken from the variable "toplines"
409 * and defaults to 5.
410 */
411int
412top(void * v)
413{
414	int *msgvec = v;
415	int *ip;
416	struct message *mp;
417	int c, topl, lines, lineb;
418	char *valtop, linebuf[LINESIZE];
419	FILE *ibuf;
420
421	topl = 5;
422	valtop = value("toplines");
423	if (valtop != NULL) {
424		topl = atoi(valtop);
425		if (topl < 0 || topl > 10000)
426			topl = 5;
427	}
428	lineb = 1;
429	for (ip = msgvec; *ip && ip-msgvec < msgCount; ip++) {
430		mp = &message[*ip - 1];
431		touch(mp);
432		dot = mp;
433		if (value("quiet") == NULL)
434			printf("Message %d:\n", *ip);
435		ibuf = setinput(mp);
436		c = mp->m_lines;
437		if (!lineb)
438			putchar('\n');
439		for (lines = 0; lines < c && lines <= topl; lines++) {
440			if (readline(ibuf, linebuf, sizeof(linebuf), NULL) < 0)
441				break;
442			puts(linebuf);
443			lineb = blankline(linebuf);
444		}
445	}
446	return(0);
447}
448
449/*
450 * Touch all the given messages so that they will
451 * get mboxed.
452 */
453int
454stouch(void *v)
455{
456	int *msgvec = v;
457	int *ip;
458
459	for (ip = msgvec; *ip != 0; ip++) {
460		dot = &message[*ip-1];
461		dot->m_flag |= MTOUCH;
462		dot->m_flag &= ~MPRESERVE;
463	}
464	return(0);
465}
466
467/*
468 * Make sure all passed messages get mboxed.
469 */
470int
471mboxit(void *v)
472{
473	int *msgvec = v;
474	int *ip;
475
476	for (ip = msgvec; *ip != 0; ip++) {
477		dot = &message[*ip-1];
478		dot->m_flag |= MTOUCH|MBOX;
479		dot->m_flag &= ~MPRESERVE;
480	}
481	return(0);
482}
483
484/*
485 * List the folders the user currently has.
486 */
487int
488folders(void *v)
489{
490	char *files = (char *)v;
491	char dirname[PATHSIZE];
492	char cmd[BUFSIZ];
493
494	if (getfold(dirname, sizeof(dirname)) < 0)
495		strlcpy(dirname, "$HOME", sizeof(dirname));
496
497	snprintf(cmd, sizeof(cmd), "cd %s; %s %s", dirname, value("LISTER"),
498		files && *files ? files : "");
499
500	(void)run_command(value("SHELL"), 0, -1, -1, "-c", cmd, NULL);
501	return(0);
502}
503
504/*
505 * Update the mail file with any new messages that have
506 * come in since we started reading mail.
507 */
508int
509inc(void *v)
510{
511	int nmsg, mdot;
512
513	nmsg = incfile();
514
515	if (nmsg == 0) {
516		puts("No new mail.");
517	} else if (nmsg > 0) {
518		mdot = newfileinfo(msgCount - nmsg);
519		dot = &message[mdot - 1];
520	} else {
521		puts("\"inc\" command failed...");
522	}
523
524	return(0);
525}
526
527/*
528 * User hit ^C while printing the headers.
529 */
530void
531hdrint(int s)
532{
533
534	gothdrint = 1;
535}
536