cmd1.c revision 1.28 
1/*	$OpenBSD: cmd1.c,v 1.28 2009/10/27 23:59:40 deraadt 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#include "rcv.h"
34#include "extern.h"
35
36/*
37 * Mail -- a mail program
38 *
39 * User commands.
40 */
41
42/*
43 * Print the current active headings.
44 * Don't change dot if invoker didn't give an argument.
45 */
46
47static int screen;
48static volatile sig_atomic_t gothdrint;
49
50int
51headers(void *v)
52{
53	int *msgvec = v;
54	int n, mesg, flag, size;
55	struct message *mp;
56	struct sigaction act, oact;
57	sigset_t oset;
58
59	size = screensize();
60	n = msgvec[0];
61	if (n != 0 && size > 0)
62		screen = (n-1)/size;
63	if (screen < 0)
64		screen = 0;
65	mp = &message[screen * size];
66	if (mp >= &message[msgCount])
67		mp = &message[msgCount - size];
68	if (mp < &message[0])
69		mp = &message[0];
70	flag = 0;
71	mesg = mp - &message[0];
72	if (dot != &message[n-1])
73		dot = mp;
74	sigemptyset(&act.sa_mask);
75	act.sa_flags = SA_RESTART;
76	act.sa_handler = hdrint;
77	if (sigaction(SIGINT, NULL, &oact) == 0 &&
78	    oact.sa_handler != SIG_IGN) {
79		(void)sigaction(SIGINT, &act, &oact);
80		(void)sigprocmask(SIG_UNBLOCK, &intset, &oset);
81	}
82	for (gothdrint = 0; !gothdrint && mp < &message[msgCount]; mp++) {
83		mesg++;
84		if (mp->m_flag & MDELETED)
85			continue;
86		if (flag++ >= size)
87			break;
88		printhead(mesg);
89	}
90	if (gothdrint) {
91		fflush(stdout);
92		fputs("\nInterrupt\n", stderr);
93	}
94	if (oact.sa_handler != SIG_IGN) {
95		(void)sigprocmask(SIG_SETMASK, &oset, NULL);
96		(void)sigaction(SIGINT, &oact, NULL);
97	}
98	if (flag == 0) {
99		puts("No more mail.");
100		return(1);
101	}
102	return(0);
103}
104
105/*
106 * Scroll to the next/previous screen
107 */
108int
109scroll(void *v)
110{
111	char *arg = v;
112	int size, maxscreen;
113	int cur[1];
114
115	cur[0] = 0;
116	size = screensize();
117	maxscreen = 0;
118	if (size > 0)
119		maxscreen = (msgCount - 1) / size;
120	switch (*arg) {
121	case 0:
122	case '+':
123		if (screen >= maxscreen) {
124			puts("On last screenful of messages");
125			return(0);
126		}
127		screen++;
128		break;
129
130	case '-':
131		if (screen <= 0) {
132			puts("On first screenful of messages");
133			return(0);
134		}
135		screen--;
136		break;
137
138	default:
139		printf("Unrecognized scrolling command \"%s\"\n", arg);
140		return(1);
141	}
142	return(headers(cur));
143}
144
145/*
146 * Compute screen size.
147 */
148int
149screensize(void)
150{
151	int s;
152	char *cp;
153
154	if ((cp = value("screen")) != NULL && (s = atoi(cp)) > 0)
155		return(s);
156	return(screenheight - 4);
157}
158
159/*
160 * Print out the headlines for each message
161 * in the passed message list.
162 */
163int
164from(void *v)
165{
166	int *msgvec = v;
167	int *ip;
168
169	for (ip = msgvec; *ip != NULL; ip++)
170		printhead(*ip);
171	if (--ip >= msgvec)
172		dot = &message[*ip - 1];
173	return(0);
174}
175
176/*
177 * Print out the header of a specific message.
178 * This is a slight improvement to the standard one.
179 */
180void
181printhead(int mesg)
182{
183	struct message *mp;
184	char headline[LINESIZE], *subjline, dispc, curind;
185	char visname[LINESIZE], vissub[LINESIZE];
186	char pbuf[LINESIZE];
187	char fmtline[LINESIZE];
188	const char *fmt;
189	struct headline hl;
190	char *name;
191	char *to, *from;
192	struct name *np;
193	char **ap;
194
195	mp = &message[mesg-1];
196	(void)readline(setinput(mp), headline, LINESIZE, NULL);
197	if ((subjline = hfield("subject", mp)) == NULL &&
198	    (subjline = hfield("subj", mp)) == NULL)
199		subjline = "";
200	/*
201	 * Bletch!
202	 */
203	curind = dot == mp ? '>' : ' ';
204	dispc = ' ';
205	if (mp->m_flag & MSAVED)
206		dispc = '*';
207	if (mp->m_flag & MPRESERVE)
208		dispc = 'P';
209	if ((mp->m_flag & (MREAD|MNEW)) == MNEW)
210		dispc = 'N';
211	if ((mp->m_flag & (MREAD|MNEW)) == 0)
212		dispc = 'U';
213	if (mp->m_flag & MBOX)
214		dispc = 'M';
215	parse(headline, &hl, pbuf);
216	from = nameof(mp, 0);
217	to = skin(hfield("to", mp));
218	np = extract(from, GTO);
219	np = delname(np, myname);
220	if (altnames)
221		for (ap = altnames; *ap; ap++)
222			np = delname(np, *ap);
223	if (np)
224		/* not from me */
225		name = value("show-rcpt") != NULL && to ? to : from;
226	else
227		/* from me - show TO */
228		name = value("showto") != NULL && to ? to : from;
229	strnvis(visname, name, sizeof(visname), VIS_SAFE|VIS_NOSLASH);
230	if (name == to)
231		fmt = "%c%c%3d TO %-14.14s  %16.16s %4d/%-5d %s";
232	else
233		fmt = "%c%c%3d %-17.17s  %16.16s %4d/%-5d %s";
234	strnvis(vissub, subjline, sizeof(vissub), VIS_SAFE|VIS_NOSLASH);
235	/* hl.l_date was sanity-checked when read in.  */
236	snprintf(fmtline, sizeof(fmtline), fmt, curind, dispc, mesg, visname,
237	    hl.l_date, mp->m_lines, mp->m_size, vissub);
238	printf("%.*s\n", screenwidth, fmtline);
239}
240
241/*
242 * Print out the value of dot.
243 */
244int
245pdot(void *v)
246{
247	printf("%d\n", (int)(dot - &message[0] + 1));
248	return(0);
249}
250
251/*
252 * Print out all the possible commands.
253 */
254int
255pcmdlist(void *v)
256{
257	extern const struct cmd cmdtab[];
258	const struct cmd *cp;
259	int cc;
260
261	puts("Commands are:");
262	for (cc = 0, cp = cmdtab; cp->c_name != NULL; cp++) {
263		cc += strlen(cp->c_name) + 2;
264		if (cc > 72) {
265			putchar('\n');
266			cc = strlen(cp->c_name) + 2;
267		}
268		if ((cp+1)->c_name != NULL)
269			printf("%s, ", cp->c_name);
270		else
271			puts(cp->c_name);
272	}
273	return(0);
274}
275
276/*
277 * Pipe message to command
278 */
279int
280pipeit(void *ml, void *sl)
281{
282	int  *msgvec = ml;
283	char *cmd    = sl;
284
285	return(type1(msgvec, cmd, 0, 0));
286}
287
288/*
289 * Paginate messages, honor ignored fields.
290 */
291int
292more(void *v)
293{
294	int *msgvec = v;
295	return(type1(msgvec, NULL, 1, 1));
296}
297
298/*
299 * Paginate messages, even printing ignored fields.
300 */
301int
302More(void *v)
303{
304	int *msgvec = v;
305
306	return(type1(msgvec, NULL, 0, 1));
307}
308
309/*
310 * Type out messages, honor ignored fields.
311 */
312int
313type(void *v)
314{
315	int *msgvec = v;
316
317	return(type1(msgvec, NULL, 1, 0));
318}
319
320/*
321 * Type out messages, even printing ignored fields.
322 */
323int
324Type(void *v)
325{
326	int *msgvec = v;
327
328	return(type1(msgvec, NULL, 0, 0));
329}
330
331/*
332 * Type out the messages requested.
333 */
334int
335type1(int *msgvec, char *cmd, int doign, int page)
336{
337	int nlines, *ip, restoreterm;
338	struct message *mp;
339	struct termios tbuf;
340	char *cp;
341	FILE *obuf;
342
343	obuf = stdout;
344	restoreterm = 0;
345
346	/*
347	 * start a pipe if needed.
348	 */
349	if (cmd) {
350		restoreterm = (tcgetattr(fileno(stdin), &tbuf) == 0);
351		obuf = Popen(cmd, "w");
352		if (obuf == NULL) {
353			warn("%s", cmd);
354			obuf = stdout;
355		}
356	} else if (value("interactive") != NULL &&
357	         (page || (cp = value("crt")) != NULL)) {
358		nlines = 0;
359		if (!page) {
360			for (ip = msgvec; *ip && ip-msgvec < msgCount; ip++)
361				nlines += message[*ip - 1].m_lines;
362		}
363		if (page || nlines > (*cp ? atoi(cp) : realscreenheight)) {
364			restoreterm = (tcgetattr(fileno(stdin), &tbuf) == 0);
365			cp = value("PAGER");
366			obuf = Popen(cp, "w");
367			if (obuf == NULL) {
368				warn("%s", cp);
369				obuf = stdout;
370			}
371		}
372	}
373
374	/*
375	 * Send messages to the output.
376	 */
377	for (ip = msgvec; *ip && ip - msgvec < msgCount; ip++) {
378		mp = &message[*ip - 1];
379		touch(mp);
380		dot = mp;
381		if (cmd == NULL && value("quiet") == NULL)
382			fprintf(obuf, "Message %d:\n", *ip);
383		if (sendmessage(mp, obuf, doign ? ignore : 0, NULL) == -1)
384			break;
385	}
386
387	if (obuf != stdout) {
388		(void)Pclose(obuf);
389		if (restoreterm)
390			(void)tcsetattr(fileno(stdin), TCSADRAIN, &tbuf);
391	}
392	return(0);
393}
394
395/*
396 * Print the top so many lines of each desired message.
397 * The number of lines is taken from the variable "toplines"
398 * and defaults to 5.
399 */
400int
401top(void * v)
402{
403	int *msgvec = v;
404	int *ip;
405	struct message *mp;
406	int c, topl, lines, lineb;
407	char *valtop, linebuf[LINESIZE];
408	FILE *ibuf;
409
410	topl = 5;
411	valtop = value("toplines");
412	if (valtop != NULL) {
413		topl = atoi(valtop);
414		if (topl < 0 || topl > 10000)
415			topl = 5;
416	}
417	lineb = 1;
418	for (ip = msgvec; *ip && ip-msgvec < msgCount; ip++) {
419		mp = &message[*ip - 1];
420		touch(mp);
421		dot = mp;
422		if (value("quiet") == NULL)
423			printf("Message %d:\n", *ip);
424		ibuf = setinput(mp);
425		c = mp->m_lines;
426		if (!lineb)
427			putchar('\n');
428		for (lines = 0; lines < c && lines <= topl; lines++) {
429			if (readline(ibuf, linebuf, sizeof(linebuf), NULL) < 0)
430				break;
431			puts(linebuf);
432			lineb = blankline(linebuf);
433		}
434	}
435	return(0);
436}
437
438/*
439 * Touch all the given messages so that they will
440 * get mboxed.
441 */
442int
443stouch(void *v)
444{
445	int *msgvec = v;
446	int *ip;
447
448	for (ip = msgvec; *ip != 0; ip++) {
449		dot = &message[*ip-1];
450		dot->m_flag |= MTOUCH;
451		dot->m_flag &= ~MPRESERVE;
452	}
453	return(0);
454}
455
456/*
457 * Make sure all passed messages get mboxed.
458 */
459int
460mboxit(void *v)
461{
462	int *msgvec = v;
463	int *ip;
464
465	for (ip = msgvec; *ip != 0; ip++) {
466		dot = &message[*ip-1];
467		dot->m_flag |= MTOUCH|MBOX;
468		dot->m_flag &= ~MPRESERVE;
469	}
470	return(0);
471}
472
473/*
474 * List the folders the user currently has.
475 */
476int
477folders(void *v)
478{
479	char *files = (char *)v;
480	char dirname[PATHSIZE];
481	char cmd[BUFSIZ];
482
483	if (getfold(dirname, sizeof(dirname)) < 0)
484		strlcpy(dirname, "$HOME", sizeof(dirname));
485
486	snprintf(cmd, sizeof(cmd), "cd %s; %s %s", dirname, value("LISTER"),
487		files && *files ? files : "");
488
489	(void)run_command(value("SHELL"), 0, -1, -1, "-c", cmd, NULL);
490	return(0);
491}
492
493/*
494 * Update the mail file with any new messages that have
495 * come in since we started reading mail.
496 */
497int
498inc(void *v)
499{
500	int nmsg, mdot;
501
502	nmsg = incfile();
503
504	if (nmsg == 0) {
505		puts("No new mail.");
506	} else if (nmsg > 0) {
507		mdot = newfileinfo(msgCount - nmsg);
508		dot = &message[mdot - 1];
509	} else {
510		puts("\"inc\" command failed...");
511	}
512
513	return(0);
514}
515
516/*
517 * User hit ^C while printing the headers.
518 */
519void
520hdrint(int s)
521{
522
523	gothdrint = 1;
524}
525