1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1980, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#ifndef lint
33#if 0
34static char sccsid[] = "@(#)cmd2.c	8.1 (Berkeley) 6/6/93";
35#endif
36#endif /* not lint */
37#include <sys/cdefs.h>
38__FBSDID("$FreeBSD$");
39
40#include "rcv.h"
41#include <sys/wait.h>
42#include "extern.h"
43
44/*
45 * Mail -- a mail program
46 *
47 * More user commands.
48 */
49
50extern int wait_status;
51
52/*
53 * If any arguments were given, go to the next applicable argument
54 * following dot, otherwise, go to the next applicable message.
55 * If given as first command with no arguments, print first message.
56 */
57int
58next(void *v)
59{
60	struct message *mp;
61	int *msgvec = v;
62	int *ip, *ip2, list[2], mdot;
63
64	if (*msgvec != 0) {
65
66		/*
67		 * If some messages were supplied, find the
68		 * first applicable one following dot using
69		 * wrap around.
70		 */
71
72		mdot = dot - &message[0] + 1;
73
74		/*
75		 * Find the first message in the supplied
76		 * message list which follows dot.
77		 */
78
79		for (ip = msgvec; *ip != 0; ip++)
80			if (*ip > mdot)
81				break;
82		if (*ip == 0)
83			ip = msgvec;
84		ip2 = ip;
85		do {
86			mp = &message[*ip2 - 1];
87			if ((mp->m_flag & MDELETED) == 0) {
88				dot = mp;
89				goto hitit;
90			}
91			if (*ip2 != 0)
92				ip2++;
93			if (*ip2 == 0)
94				ip2 = msgvec;
95		} while (ip2 != ip);
96		printf("No messages applicable\n");
97		return (1);
98	}
99
100	/*
101	 * If this is the first command, select message 1.
102	 * Note that this must exist for us to get here at all.
103	 */
104
105	if (!sawcom)
106		goto hitit;
107
108	/*
109	 * Just find the next good message after dot, no
110	 * wraparound.
111	 */
112
113	for (mp = dot+1; mp < &message[msgCount]; mp++)
114		if ((mp->m_flag & (MDELETED|MSAVED)) == 0)
115			break;
116	if (mp >= &message[msgCount]) {
117		printf("At EOF\n");
118		return (0);
119	}
120	dot = mp;
121hitit:
122	/*
123	 * Print dot.
124	 */
125
126	list[0] = dot - &message[0] + 1;
127	list[1] = 0;
128	return (type(list));
129}
130
131/*
132 * Save a message in a file.  Mark the message as saved
133 * so we can discard when the user quits.
134 */
135int
136save(void *v)
137{
138	char *str = v;
139
140	return (save1(str, 1, "save", saveignore));
141}
142
143/*
144 * Copy a message to a file without affected its saved-ness
145 */
146int
147copycmd(void *v)
148{
149	char *str = v;
150
151	return (save1(str, 0, "copy", saveignore));
152}
153
154/*
155 * Save/copy the indicated messages at the end of the passed file name.
156 * If mark is true, mark the message "saved."
157 */
158int
159save1(char str[], int mark, const char *cmd, struct ignoretab *ignore)
160{
161	struct message *mp;
162	char *file;
163	const char *disp;
164	int f, *msgvec, *ip;
165	FILE *obuf;
166
167	msgvec = (int *)salloc((msgCount + 2) * sizeof(*msgvec));
168	if ((file = snarf(str, &f)) == NULL)
169		return (1);
170	if (!f) {
171		*msgvec = first(0, MMNORM);
172		if (*msgvec == 0) {
173			printf("No messages to %s.\n", cmd);
174			return (1);
175		}
176		msgvec[1] = 0;
177	}
178	if (f && getmsglist(str, msgvec, 0) < 0)
179		return (1);
180	if ((file = expand(file)) == NULL)
181		return (1);
182	printf("\"%s\" ", file);
183	(void)fflush(stdout);
184	if (access(file, 0) >= 0)
185		disp = "[Appended]";
186	else
187		disp = "[New file]";
188	if ((obuf = Fopen(file, "a")) == NULL) {
189		warn((char *)NULL);
190		return (1);
191	}
192	for (ip = msgvec; *ip && ip-msgvec < msgCount; ip++) {
193		mp = &message[*ip - 1];
194		touch(mp);
195		if (sendmessage(mp, obuf, ignore, NULL) < 0) {
196			warnx("%s", file);
197			(void)Fclose(obuf);
198			return (1);
199		}
200		if (mark)
201			mp->m_flag |= MSAVED;
202	}
203	(void)fflush(obuf);
204	if (ferror(obuf))
205		warn("%s", file);
206	(void)Fclose(obuf);
207	printf("%s\n", disp);
208	return (0);
209}
210
211/*
212 * Write the indicated messages at the end of the passed
213 * file name, minus header and trailing blank line.
214 */
215int
216swrite(void *v)
217{
218	char *str = v;
219
220	return (save1(str, 1, "write", ignoreall));
221}
222
223/*
224 * Snarf the file from the end of the command line and
225 * return a pointer to it.  If there is no file attached,
226 * just return NULL.  Put a null in front of the file
227 * name so that the message list processing won't see it,
228 * unless the file name is the only thing on the line, in
229 * which case, return 0 in the reference flag variable.
230 */
231
232char *
233snarf(char *linebuf, int *flag)
234{
235	char *cp;
236
237	*flag = 1;
238	cp = strlen(linebuf) + linebuf - 1;
239
240	/*
241	 * Strip away trailing blanks.
242	 */
243
244	while (cp > linebuf && isspace((unsigned char)*cp))
245		cp--;
246	*++cp = '\0';
247
248	/*
249	 * Now search for the beginning of the file name.
250	 */
251
252	while (cp > linebuf && !isspace((unsigned char)*cp))
253		cp--;
254	if (*cp == '\0') {
255		printf("No file specified.\n");
256		return (NULL);
257	}
258	if (isspace((unsigned char)*cp))
259		*cp++ = '\0';
260	else
261		*flag = 0;
262	return (cp);
263}
264
265/*
266 * Delete messages.
267 */
268int
269deletecmd(void *v)
270{
271	int *msgvec = v;
272
273	delm(msgvec);
274	return (0);
275}
276
277/*
278 * Delete messages, then type the new dot.
279 */
280int
281deltype(void *v)
282{
283	int *msgvec = v;
284	int list[2];
285	int lastdot;
286
287	lastdot = dot - &message[0] + 1;
288	if (delm(msgvec) >= 0) {
289		list[0] = dot - &message[0] + 1;
290		if (list[0] > lastdot) {
291			touch(dot);
292			list[1] = 0;
293			return (type(list));
294		}
295		printf("At EOF\n");
296	} else
297		printf("No more messages\n");
298	return (0);
299}
300
301/*
302 * Delete the indicated messages.
303 * Set dot to some nice place afterwards.
304 * Internal interface.
305 */
306int
307delm(int *msgvec)
308{
309	struct message *mp;
310	int *ip, last;
311
312	last = 0;
313	for (ip = msgvec; *ip != 0; ip++) {
314		mp = &message[*ip - 1];
315		touch(mp);
316		mp->m_flag |= MDELETED|MTOUCH;
317		mp->m_flag &= ~(MPRESERVE|MSAVED|MBOX);
318		last = *ip;
319	}
320	if (last != 0) {
321		dot = &message[last-1];
322		last = first(0, MDELETED);
323		if (last != 0) {
324			dot = &message[last-1];
325			return (0);
326		}
327		else {
328			dot = &message[0];
329			return (-1);
330		}
331	}
332
333	/*
334	 * Following can't happen -- it keeps lint happy
335	 */
336
337	return (-1);
338}
339
340/*
341 * Undelete the indicated messages.
342 */
343int
344undeletecmd(void *v)
345{
346	int *msgvec = v;
347	int *ip;
348	struct message *mp;
349
350	for (ip = msgvec; *ip && ip-msgvec < msgCount; ip++) {
351		mp = &message[*ip - 1];
352		touch(mp);
353		dot = mp;
354		mp->m_flag &= ~MDELETED;
355	}
356	return (0);
357}
358
359/*
360 * Interactively dump core on "core"
361 */
362int
363core(void)
364{
365	int pid;
366
367	switch (pid = fork()) {
368	case -1:
369		warn("fork");
370		return (1);
371	case 0:
372		abort();
373		_exit(1);
374	}
375	printf("Okie dokie");
376	(void)fflush(stdout);
377	wait_child(pid);
378	if (WIFSIGNALED(wait_status) && WCOREDUMP(wait_status))
379		printf(" -- Core dumped.\n");
380	else
381		printf(" -- Can't dump core.\n");
382	return (0);
383}
384
385/*
386 * Clobber as many bytes of stack as the user requests.
387 */
388int
389clobber(char **argv)
390{
391	int times;
392
393	if (argv[0] == 0)
394		times = 1;
395	else
396		times = (atoi(argv[0]) + 511) / 512;
397	clob1(times);
398	return (0);
399}
400
401/*
402 * Clobber the stack.
403 */
404void
405clob1(int n)
406{
407	char buf[512];
408	char *cp;
409
410	if (n <= 0)
411		return;
412	for (cp = buf; cp < &buf[512]; *cp++ = 0xFF)
413		;
414	clob1(n - 1);
415}
416
417/*
418 * Add the given header fields to the retained list.
419 * If no arguments, print the current list of retained fields.
420 */
421int
422retfield(void *v)
423{
424	char **list = v;
425
426	return (ignore1(list, ignore + 1, "retained"));
427}
428
429/*
430 * Add the given header fields to the ignored list.
431 * If no arguments, print the current list of ignored fields.
432 */
433int
434igfield(void *v)
435{
436	char **list = v;
437
438	return (ignore1(list, ignore, "ignored"));
439}
440
441int
442saveretfield(void *v)
443{
444	char **list = v;
445
446	return (ignore1(list, saveignore + 1, "retained"));
447}
448
449int
450saveigfield(void *v)
451{
452	char **list = v;
453
454	return (ignore1(list, saveignore, "ignored"));
455}
456
457int
458ignore1(char **list, struct ignoretab *tab, const char *which)
459{
460	char field[LINESIZE];
461	char **ap;
462	struct ignore *igp;
463	int h;
464
465	if (*list == NULL)
466		return (igshow(tab, which));
467	for (ap = list; *ap != 0; ap++) {
468		istrncpy(field, *ap, sizeof(field));
469		if (member(field, tab))
470			continue;
471		h = hash(field);
472		igp = calloc(1, sizeof(struct ignore));
473		igp->i_field = calloc((unsigned)strlen(field) + 1,
474		    sizeof(char));
475		strcpy(igp->i_field, field);
476		igp->i_link = tab->i_head[h];
477		tab->i_head[h] = igp;
478		tab->i_count++;
479	}
480	return (0);
481}
482
483/*
484 * Print out all currently retained fields.
485 */
486int
487igshow(struct ignoretab *tab, const char *which)
488{
489	int h;
490	struct ignore *igp;
491	char **ap, **ring;
492
493	if (tab->i_count == 0) {
494		printf("No fields currently being %s.\n", which);
495		return (0);
496	}
497	ring = (char **)salloc((tab->i_count + 1) * sizeof(char *));
498	ap = ring;
499	for (h = 0; h < HSHSIZE; h++)
500		for (igp = tab->i_head[h]; igp != NULL; igp = igp->i_link)
501			*ap++ = igp->i_field;
502	*ap = 0;
503	qsort(ring, tab->i_count, sizeof(char *), igcomp);
504	for (ap = ring; *ap != 0; ap++)
505		printf("%s\n", *ap);
506	return (0);
507}
508
509/*
510 * Compare two names for sorting ignored field list.
511 */
512int
513igcomp(const void *l, const void *r)
514{
515
516	return (strcmp(*(const char **)l, *(const char **)r));
517}
518