xref: /dragonfly/usr.bin/mail/cmd1.c (revision 1d1731fa) 
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  * @(#)cmd1.c	8.2 (Berkeley) 4/20/95
34  * $FreeBSD: src/usr.bin/mail/cmd1.c,v 1.3.6.3 2003/01/06 05:46:03 mikeh Exp $
35  * $DragonFly: src/usr.bin/mail/cmd1.c,v 1.3 2003/10/04 20:36:48 hmp Exp $
36  */
37 
38 #include "rcv.h"
39 #include "extern.h"
40 
41 /*
42  * Mail -- a mail program
43  *
44  * User commands.
45  */
46 
47 extern const struct cmd cmdtab[];
48 
49 /*
50  * Print the current active headings.
51  * Don't change dot if invoker didn't give an argument.
52  */
53 
54 static int screen;
55 
56 int
57 headers(int *msgvec)
58 {
59 	int n, mesg, flag, size;
60 	struct message *mp;
61 
62 	size = screensize();
63 	n = msgvec[0];
64 	if (n != 0)
65 		screen = (n-1)/size;
66 	if (screen < 0)
67 		screen = 0;
68 	mp = &message[screen * size];
69 	if (mp >= &message[msgCount])
70 		mp = &message[msgCount - size];
71 	if (mp < &message[0])
72 		mp = &message[0];
73 	flag = 0;
74 	mesg = mp - &message[0];
75 	if (dot != &message[n-1])
76 		dot = mp;
77 	for (; mp < &message[msgCount]; mp++) {
78 		mesg++;
79 		if (mp->m_flag & MDELETED)
80 			continue;
81 		if (flag++ >= size)
82 			break;
83 		printhead(mesg);
84 	}
85 	if (flag == 0) {
86 		printf("No more mail.\n");
87 		return (1);
88 	}
89 	return (0);
90 }
91 
92 /*
93  * Scroll to the next/previous screen
94  */
95 int
96 scroll(char *arg)
97 {
98 	int s, size;
99 	int cur[1];
100 
101 	cur[0] = 0;
102 	size = screensize();
103 	s = screen;
104 	switch (*arg) {
105 	case 0:
106 	case '+':
107 		s++;
108 		if (s * size >= msgCount) {
109 			printf("On last screenful of messages\n");
110 			return (0);
111 		}
112 		screen = s;
113 		break;
114 
115 	case '-':
116 		if (--s < 0) {
117 			printf("On first screenful of messages\n");
118 			return (0);
119 		}
120 		screen = s;
121 		break;
122 
123 	default:
124 		printf("Unrecognized scrolling command \"%s\"\n", arg);
125 		return (1);
126 	}
127 	return (headers(cur));
128 }
129 
130 /*
131  * Compute screen size.
132  */
133 int
134 screensize(void)
135 {
136 	int s;
137 	char *cp;
138 
139 	if ((cp = value("screen")) != NULL && (s = atoi(cp)) > 0)
140 		return (s);
141 	return (screenheight - 4);
142 }
143 
144 /*
145  * Print out the headlines for each message
146  * in the passed message list.
147  */
148 int
149 from(int *msgvec)
150 {
151 	int *ip;
152 
153 	for (ip = msgvec; *ip != 0; ip++)
154 		printhead(*ip);
155 	if (--ip >= msgvec)
156 		dot = &message[*ip - 1];
157 	return (0);
158 }
159 
160 /*
161  * Print out the header of a specific message.
162  * This is a slight improvement to the standard one.
163  */
164 void
165 printhead(int mesg)
166 {
167 	struct message *mp;
168 	char headline[LINESIZE], wcount[LINESIZE], *subjline, dispc, curind;
169 	char pbuf[BUFSIZ];
170 	struct headline hl;
171 	int subjlen;
172 	char *name;
173 
174 	mp = &message[mesg-1];
175 	(void)readline(setinput(mp), headline, LINESIZE);
176 	if ((subjline = hfield("subject", mp)) == NULL)
177 		subjline = hfield("subj", mp);
178 	/*
179 	 * Bletch!
180 	 */
181 	curind = dot == mp ? '>' : ' ';
182 	dispc = ' ';
183 	if (mp->m_flag & MSAVED)
184 		dispc = '*';
185 	if (mp->m_flag & MPRESERVE)
186 		dispc = 'P';
187 	if ((mp->m_flag & (MREAD|MNEW)) == MNEW)
188 		dispc = 'N';
189 	if ((mp->m_flag & (MREAD|MNEW)) == 0)
190 		dispc = 'U';
191 	if (mp->m_flag & MBOX)
192 		dispc = 'M';
193 	parse(headline, &hl, pbuf);
194 	sprintf(wcount, "%3ld/%-5ld", mp->m_lines, mp->m_size);
195 	subjlen = screenwidth - 50 - strlen(wcount);
196 	name = value("show-rcpt") != NULL ?
197 		skin(hfield("to", mp)) : nameof(mp, 0);
198 	if (subjline == NULL || subjlen < 0)		/* pretty pathetic */
199 		printf("%c%c%3d %-20.20s  %16.16s %s\n",
200 			curind, dispc, mesg, name, hl.l_date, wcount);
201 	else
202 		printf("%c%c%3d %-20.20s  %16.16s %s \"%.*s\"\n",
203 			curind, dispc, mesg, name, hl.l_date, wcount,
204 			subjlen, subjline);
205 }
206 
207 /*
208  * Print out the value of dot.
209  */
210 int
211 pdot(void)
212 {
213 	printf("%d\n", dot - &message[0] + 1);
214 	return (0);
215 }
216 
217 /*
218  * Print out all the possible commands.
219  */
220 int
221 pcmdlist(void)
222 {
223 	const struct cmd *cp;
224 	int cc;
225 
226 	printf("Commands are:\n");
227 	for (cc = 0, cp = cmdtab; cp->c_name != NULL; cp++) {
228 		cc += strlen(cp->c_name) + 2;
229 		if (cc > 72) {
230 			printf("\n");
231 			cc = strlen(cp->c_name) + 2;
232 		}
233 		if ((cp+1)->c_name != NULL)
234 			printf("%s, ", cp->c_name);
235 		else
236 			printf("%s\n", cp->c_name);
237 	}
238 	return (0);
239 }
240 
241 /*
242  * Paginate messages, honor ignored fields.
243  */
244 int
245 more(int *msgvec)
246 {
247 
248 	return (type1(msgvec, 1, 1));
249 }
250 
251 /*
252  * Paginate messages, even printing ignored fields.
253  */
254 int
255 More(int *msgvec)
256 {
257 
258 	return (type1(msgvec, 0, 1));
259 }
260 
261 /*
262  * Type out messages, honor ignored fields.
263  */
264 int
265 type(int *msgvec)
266 {
267 
268 	return (type1(msgvec, 1, 0));
269 }
270 
271 /*
272  * Type out messages, even printing ignored fields.
273  */
274 int
275 Type(int *msgvec)
276 {
277 
278 	return (type1(msgvec, 0, 0));
279 }
280 
281 /*
282  * Type out the messages requested.
283  */
284 jmp_buf	pipestop;
285 int
286 type1(int *msgvec, int doign, int page)
287 {
288 	int nlines, *ip;
289 	struct message *mp;
290 	char *cp;
291 	FILE *obuf;
292 
293 	obuf = stdout;
294 	if (setjmp(pipestop))
295 		goto close_pipe;
296 	if (value("interactive") != NULL &&
297 	    (page || (cp = value("crt")) != NULL)) {
298 		nlines = 0;
299 		if (!page) {
300 			for (ip = msgvec; *ip && ip-msgvec < msgCount; ip++)
301 				nlines += message[*ip - 1].m_lines;
302 		}
303 		if (page || nlines > (*cp ? atoi(cp) : realscreenheight)) {
304 			cp = value("PAGER");
305 			if (cp == NULL || *cp == '\0')
306 				cp = _PATH_MORE;
307 			obuf = Popen(cp, "w");
308 			if (obuf == NULL) {
309 				warnx("%s", cp);
310 				obuf = stdout;
311 			} else
312 				(void)signal(SIGPIPE, brokpipe);
313 		}
314 	}
315 
316 	/*
317 	 * Send messages to the output.
318 	 *
319 	 */
320 	for (ip = msgvec; *ip && ip - msgvec < msgCount; ip++) {
321 		mp = &message[*ip - 1];
322 		touch(mp);
323 		dot = mp;
324 		if (value("quiet") == NULL)
325 			fprintf(obuf, "Message %d:\n", *ip);
326 		(void)sendmessage(mp, obuf, doign ? ignore : 0, NULL);
327 	}
328 
329 close_pipe:
330 	if (obuf != stdout) {
331 		/*
332 		 * Ignore SIGPIPE so it can't cause a duplicate close.
333 		 */
334 		(void)signal(SIGPIPE, SIG_IGN);
335 		(void)Pclose(obuf);
336 		(void)signal(SIGPIPE, SIG_DFL);
337 	}
338 	return (0);
339 }
340 
341 /*
342  * Respond to a broken pipe signal --
343  * probably caused by quitting more.
344  */
345 /*ARGSUSED*/
346 void
347 brokpipe(int signo)
348 {
349 	longjmp(pipestop, 1);
350 }
351 
352 /*
353  * Print the top so many lines of each desired message.
354  * The number of lines is taken from the variable "toplines"
355  * and defaults to 5.
356  */
357 int
358 top(int *msgvec)
359 {
360 	int *ip;
361 	struct message *mp;
362 	int c, topl, lines, lineb;
363 	char *valtop, linebuf[LINESIZE];
364 	FILE *ibuf;
365 
366 	topl = 5;
367 	valtop = value("toplines");
368 	if (valtop != NULL) {
369 		topl = atoi(valtop);
370 		if (topl < 0 || topl > 10000)
371 			topl = 5;
372 	}
373 	lineb = 1;
374 	for (ip = msgvec; *ip && ip-msgvec < msgCount; ip++) {
375 		mp = &message[*ip - 1];
376 		touch(mp);
377 		dot = mp;
378 		if (value("quiet") == NULL)
379 			printf("Message %d:\n", *ip);
380 		ibuf = setinput(mp);
381 		c = mp->m_lines;
382 		if (!lineb)
383 			printf("\n");
384 		for (lines = 0; lines < c && lines <= topl; lines++) {
385 			if (readline(ibuf, linebuf, sizeof(linebuf)) < 0)
386 				break;
387 			puts(linebuf);
388 			lineb = strspn(linebuf, " \t") == strlen(linebuf);
389 		}
390 	}
391 	return (0);
392 }
393 
394 /*
395  * Touch all the given messages so that they will
396  * get mboxed.
397  */
398 int
399 stouch(int *msgvec)
400 {
401 	int *ip;
402 
403 	for (ip = msgvec; *ip != 0; ip++) {
404 		dot = &message[*ip-1];
405 		dot->m_flag |= MTOUCH;
406 		dot->m_flag &= ~MPRESERVE;
407 	}
408 	return (0);
409 }
410 
411 /*
412  * Make sure all passed messages get mboxed.
413  */
414 int
415 mboxit(int *msgvec)
416 {
417 	int *ip;
418 
419 	for (ip = msgvec; *ip != 0; ip++) {
420 		dot = &message[*ip-1];
421 		dot->m_flag |= MTOUCH|MBOX;
422 		dot->m_flag &= ~MPRESERVE;
423 	}
424 	return (0);
425 }
426 
427 /*
428  * List the folders the user currently has.
429  */
430 int
431 folders(void)
432 {
433 	char dirname[PATHSIZE];
434 	char *cmd;
435 
436 	if (getfold(dirname, sizeof(dirname)) < 0) {
437 		printf("No value set for \"folder\"\n");
438 		return (1);
439 	}
440 	if ((cmd = value("LISTER")) == NULL)
441 		cmd = "ls";
442 	(void)run_command(cmd, 0, -1, -1, dirname, NULL, NULL);
443 	return (0);
444 }
445 
446 /*
447  * Update the mail file with any new messages that have
448  * come in since we started reading mail.
449  */
450 int
451 inc(void *v)
452 {
453 	int nmsg, mdot;
454 
455 	nmsg = incfile();
456 
457 	if (nmsg == 0)
458 		printf("No new mail.\n");
459 	else if (nmsg > 0) {
460 		mdot = newfileinfo(msgCount - nmsg);
461 		dot = &message[mdot - 1];
462 	} else
463 		printf("\"inc\" command failed...\n");
464 
465 	return (0);
466 }
467