cmd1.c revision 1.26 
1/*	$OpenBSD: cmd1.c,v 1.26 2007/04/03 18:01:49 martynas 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. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#ifndef lint
34#if 0
35static const char sccsid[] = "@(#)cmd1.c	8.2 (Berkeley) 4/20/95";
36#else
37static const char rcsid[] = "$OpenBSD: cmd1.c,v 1.26 2007/04/03 18:01:49 martynas Exp $";
38#endif
39#endif /* not lint */
40
41#include "rcv.h"
42#include "extern.h"
43
44/*
45 * Mail -- a mail program
46 *
47 * User commands.
48 */
49
50/*
51 * Print the current active headings.
52 * Don't change dot if invoker didn't give an argument.
53 */
54
55static int screen;
56static volatile sig_atomic_t gothdrint;
57
58int
59headers(void *v)
60{
61	int *msgvec = v;
62	int n, mesg, flag, size;
63	struct message *mp;
64	struct sigaction act, oact;
65	sigset_t oset;
66
67	size = screensize();
68	n = msgvec[0];
69	if (n != 0 && size > 0)
70		screen = (n-1)/size;
71	if (screen < 0)
72		screen = 0;
73	mp = &message[screen * size];
74	if (mp >= &message[msgCount])
75		mp = &message[msgCount - size];
76	if (mp < &message[0])
77		mp = &message[0];
78	flag = 0;
79	mesg = mp - &message[0];
80	if (dot != &message[n-1])
81		dot = mp;
82	sigemptyset(&act.sa_mask);
83	act.sa_flags = SA_RESTART;
84	act.sa_handler = hdrint;
85	if (sigaction(SIGINT, NULL, &oact) == 0 &&
86	    oact.sa_handler != SIG_IGN) {
87		(void)sigaction(SIGINT, &act, &oact);
88		(void)sigprocmask(SIG_UNBLOCK, &intset, &oset);
89	}
90	for (gothdrint = 0; !gothdrint && mp < &message[msgCount]; mp++) {
91		mesg++;
92		if (mp->m_flag & MDELETED)
93			continue;
94		if (flag++ >= size)
95			break;
96		printhead(mesg);
97	}
98	if (gothdrint) {
99		fflush(stdout);
100		fputs("\nInterrupt\n", stderr);
101	}
102	if (oact.sa_handler != SIG_IGN) {
103		(void)sigprocmask(SIG_SETMASK, &oset, NULL);
104		(void)sigaction(SIGINT, &oact, NULL);
105	}
106	if (flag == 0) {
107		puts("No more mail.");
108		return(1);
109	}
110	return(0);
111}
112
113/*
114 * Scroll to the next/previous screen
115 */
116int
117scroll(void *v)
118{
119	char *arg = v;
120	int size, maxscreen;
121	int cur[1];
122
123	cur[0] = 0;
124	size = screensize();
125	maxscreen = 0;
126	if (size > 0)
127		maxscreen = (msgCount - 1) / size;
128	switch (*arg) {
129	case 0:
130	case '+':
131		if (screen >= maxscreen) {
132			puts("On last screenful of messages");
133			return(0);
134		}
135		screen++;
136		break;
137
138	case '-':
139		if (screen <= 0) {
140			puts("On first screenful of messages");
141			return(0);
142		}
143		screen--;
144		break;
145
146	default:
147		printf("Unrecognized scrolling command \"%s\"\n", arg);
148		return(1);
149	}
150	return(headers(cur));
151}
152
153/*
154 * Compute screen size.
155 */
156int
157screensize(void)
158{
159	int s;
160	char *cp;
161
162	if ((cp = value("screen")) != NULL && (s = atoi(cp)) > 0)
163		return(s);
164	return(screenheight - 4);
165}
166
167/*
168 * Print out the headlines for each message
169 * in the passed message list.
170 */
171int
172from(void *v)
173{
174	int *msgvec = v;
175	int *ip;
176
177	for (ip = msgvec; *ip != NULL; ip++)
178		printhead(*ip);
179	if (--ip >= msgvec)
180		dot = &message[*ip - 1];
181	return(0);
182}
183
184/*
185 * Print out the header of a specific message.
186 * This is a slight improvement to the standard one.
187 */
188void
189printhead(int mesg)
190{
191	struct message *mp;
192	char headline[LINESIZE], *subjline, dispc, curind;
193	char visname[LINESIZE], vissub[LINESIZE];
194	char pbuf[LINESIZE];
195	char fmtline[LINESIZE];
196	const char *fmt;
197	struct headline hl;
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)) == NULL)
207		subjline = "";
208	/*
209	 * Bletch!
210	 */
211	curind = dot == mp ? '>' : ' ';
212	dispc = ' ';
213	if (mp->m_flag & MSAVED)
214		dispc = '*';
215	if (mp->m_flag & MPRESERVE)
216		dispc = 'P';
217	if ((mp->m_flag & (MREAD|MNEW)) == MNEW)
218		dispc = 'N';
219	if ((mp->m_flag & (MREAD|MNEW)) == 0)
220		dispc = 'U';
221	if (mp->m_flag & MBOX)
222		dispc = 'M';
223	parse(headline, &hl, pbuf);
224	from = nameof(mp, 0);
225	to = skin(hfield("to", mp));
226	np = extract(from, GTO);
227	np = delname(np, myname);
228	if (altnames)
229		for (ap = altnames; *ap; ap++)
230			np = delname(np, *ap);
231	if (np)
232		/* not from me */
233		name = value("show-rcpt") != NULL && to ? to : from;
234	else
235		/* from me - show TO */
236		name = value("showto") != NULL && to ? to : from;
237	strnvis(visname, name, sizeof(visname), VIS_SAFE|VIS_NOSLASH);
238	if (name == to)
239		fmt = "%c%c%3d TO %-14.14s  %16.16s %4d/%-5d %s";
240	else
241		fmt = "%c%c%3d %-17.17s  %16.16s %4d/%-5d %s";
242	strnvis(vissub, subjline, sizeof(vissub), VIS_SAFE|VIS_NOSLASH);
243	/* hl.l_date was sanity-checked when read in.  */
244	snprintf(fmtline, sizeof(fmtline), fmt, curind, dispc, mesg, visname,
245	    hl.l_date, mp->m_lines, mp->m_size, vissub);
246	printf("%.*s\n", screenwidth, fmtline);
247}
248
249/*
250 * Print out the value of dot.
251 */
252int
253pdot(void *v)
254{
255	printf("%d\n", (int)(dot - &message[0] + 1));
256	return(0);
257}
258
259/*
260 * Print out all the possible commands.
261 */
262int
263pcmdlist(void *v)
264{
265	extern const struct cmd cmdtab[];
266	const struct cmd *cp;
267	int cc;
268
269	puts("Commands are:");
270	for (cc = 0, cp = cmdtab; cp->c_name != NULL; cp++) {
271		cc += strlen(cp->c_name) + 2;
272		if (cc > 72) {
273			putchar('\n');
274			cc = strlen(cp->c_name) + 2;
275		}
276		if ((cp+1)->c_name != NULL)
277			printf("%s, ", cp->c_name);
278		else
279			puts(cp->c_name);
280	}
281	return(0);
282}
283
284/*
285 * Pipe message to command
286 */
287int
288pipeit(void *ml, void *sl)
289{
290	int  *msgvec = ml;
291	char *cmd    = sl;
292
293	return(type1(msgvec, cmd, 0, 0));
294}
295
296/*
297 * Paginate messages, honor ignored fields.
298 */
299int
300more(void *v)
301{
302	int *msgvec = v;
303	return(type1(msgvec, NULL, 1, 1));
304}
305
306/*
307 * Paginate messages, even printing ignored fields.
308 */
309int
310More(void *v)
311{
312	int *msgvec = v;
313
314	return(type1(msgvec, NULL, 0, 1));
315}
316
317/*
318 * Type out messages, honor ignored fields.
319 */
320int
321type(void *v)
322{
323	int *msgvec = v;
324
325	return(type1(msgvec, NULL, 1, 0));
326}
327
328/*
329 * Type out messages, even printing ignored fields.
330 */
331int
332Type(void *v)
333{
334	int *msgvec = v;
335
336	return(type1(msgvec, NULL, 0, 0));
337}
338
339/*
340 * Type out the messages requested.
341 */
342int
343type1(int *msgvec, char *cmd, int doign, int page)
344{
345	int nlines, *ip, restoreterm;
346	struct message *mp;
347	struct termios tbuf;
348	char *cp;
349	FILE *obuf;
350
351	obuf = stdout;
352	restoreterm = 0;
353
354	/*
355	 * start a pipe if needed.
356	 */
357	if (cmd) {
358		restoreterm = (tcgetattr(fileno(stdin), &tbuf) == 0);
359		obuf = Popen(cmd, "w");
360		if (obuf == NULL) {
361			warn("%s", cmd);
362			obuf = stdout;
363		}
364	} else if (value("interactive") != NULL &&
365	         (page || (cp = value("crt")) != NULL)) {
366		nlines = 0;
367		if (!page) {
368			for (ip = msgvec; *ip && ip-msgvec < msgCount; ip++)
369				nlines += message[*ip - 1].m_lines;
370		}
371		if (page || nlines > (*cp ? atoi(cp) : realscreenheight)) {
372			restoreterm = (tcgetattr(fileno(stdin), &tbuf) == 0);
373			obuf = Popen(value("PAGER"), "w");
374			if (obuf == NULL) {
375				warn("%s", cp);
376				obuf = stdout;
377			}
378		}
379	}
380
381	/*
382	 * Send messages to the output.
383	 */
384	for (ip = msgvec; *ip && ip - msgvec < msgCount; ip++) {
385		mp = &message[*ip - 1];
386		touch(mp);
387		dot = mp;
388		if (cmd == NULL && value("quiet") == NULL)
389			fprintf(obuf, "Message %d:\n", *ip);
390		if (sendmessage(mp, obuf, doign ? ignore : 0, NULL) == -1)
391			break;
392	}
393
394	if (obuf != stdout) {
395		(void)Pclose(obuf);
396		if (restoreterm)
397			(void)tcsetattr(fileno(stdin), TCSADRAIN, &tbuf);
398	}
399	return(0);
400}
401
402/*
403 * Print the top so many lines of each desired message.
404 * The number of lines is taken from the variable "toplines"
405 * and defaults to 5.
406 */
407int
408top(void * v)
409{
410	int *msgvec = v;
411	int *ip;
412	struct message *mp;
413	int c, topl, lines, lineb;
414	char *valtop, linebuf[LINESIZE];
415	FILE *ibuf;
416
417	topl = 5;
418	valtop = value("toplines");
419	if (valtop != NULL) {
420		topl = atoi(valtop);
421		if (topl < 0 || topl > 10000)
422			topl = 5;
423	}
424	lineb = 1;
425	for (ip = msgvec; *ip && ip-msgvec < msgCount; ip++) {
426		mp = &message[*ip - 1];
427		touch(mp);
428		dot = mp;
429		if (value("quiet") == NULL)
430			printf("Message %d:\n", *ip);
431		ibuf = setinput(mp);
432		c = mp->m_lines;
433		if (!lineb)
434			putchar('\n');
435		for (lines = 0; lines < c && lines <= topl; lines++) {
436			if (readline(ibuf, linebuf, sizeof(linebuf), NULL) < 0)
437				break;
438			puts(linebuf);
439			lineb = blankline(linebuf);
440		}
441	}
442	return(0);
443}
444
445/*
446 * Touch all the given messages so that they will
447 * get mboxed.
448 */
449int
450stouch(void *v)
451{
452	int *msgvec = v;
453	int *ip;
454
455	for (ip = msgvec; *ip != 0; ip++) {
456		dot = &message[*ip-1];
457		dot->m_flag |= MTOUCH;
458		dot->m_flag &= ~MPRESERVE;
459	}
460	return(0);
461}
462
463/*
464 * Make sure all passed messages get mboxed.
465 */
466int
467mboxit(void *v)
468{
469	int *msgvec = v;
470	int *ip;
471
472	for (ip = msgvec; *ip != 0; ip++) {
473		dot = &message[*ip-1];
474		dot->m_flag |= MTOUCH|MBOX;
475		dot->m_flag &= ~MPRESERVE;
476	}
477	return(0);
478}
479
480/*
481 * List the folders the user currently has.
482 */
483int
484folders(void *v)
485{
486	char *files = (char *)v;
487	char dirname[PATHSIZE];
488	char cmd[BUFSIZ];
489
490	if (getfold(dirname, sizeof(dirname)) < 0)
491		strlcpy(dirname, "$HOME", sizeof(dirname));
492
493	snprintf(cmd, sizeof(cmd), "cd %s; %s %s", dirname, value("LISTER"),
494		files && *files ? files : "");
495
496	(void)run_command(value("SHELL"), 0, -1, -1, "-c", cmd, NULL);
497	return(0);
498}
499
500/*
501 * Update the mail file with any new messages that have
502 * come in since we started reading mail.
503 */
504int
505inc(void *v)
506{
507	int nmsg, mdot;
508
509	nmsg = incfile();
510
511	if (nmsg == 0) {
512		puts("No new mail.");
513	} else if (nmsg > 0) {
514		mdot = newfileinfo(msgCount - nmsg);
515		dot = &message[mdot - 1];
516	} else {
517		puts("\"inc\" command failed...");
518	}
519
520	return(0);
521}
522
523/*
524 * User hit ^C while printing the headers.
525 */
526void
527hdrint(int s)
528{
529
530	gothdrint = 1;
531}
532