Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/mail/cmd3.c	Lines:	0	314	0.0 %
Date:	2017-11-13	Branches:	0	185	0.0 %


/*	$OpenBSD: cmd3.c,v 1.27 2015/10/16 17:56:07 mmcc Exp $	*/
/*	$NetBSD: cmd3.c,v 1.8 1997/07/09 05:29:49 mikel Exp $	*/

/*
 * Copyright (c) 1980, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "rcv.h"
#include "extern.h"

/*
 * Mail -- a mail program
 *
 * Still more user commands.
 */
static int diction(const void *, const void *);

/*
 * Process a shell escape by saving signals, ignoring signals,
 * and forking a sh -c
 */
int
shell(void *v)
{
	char *str = v;
	char *shell;
	char cmd[BUFSIZ];
	struct sigaction oact;
	sigset_t oset;

	(void)ignoresig(SIGINT, &oact, &oset);
	(void)strlcpy(cmd, str, sizeof(cmd));
	if (bangexp(cmd, sizeof(cmd)) < 0)
		return(1);
	shell = value("SHELL");
	(void)run_command(shell, 0, 0, -1, "-c", cmd, NULL);
	(void)sigprocmask(SIG_SETMASK, &oset, NULL);
	(void)sigaction(SIGINT, &oact, NULL);
	puts("!");
	return(0);
}

/*
 * Fork an interactive shell.
 */
/*ARGSUSED*/
int
dosh(void *v)
{
	char *shell;
	struct sigaction oact;
	sigset_t oset;

	shell = value("SHELL");
	(void)ignoresig(SIGINT, &oact, &oset);
	(void)run_command(shell, 0, 0, -1, NULL, NULL, NULL);
	(void)sigprocmask(SIG_SETMASK, &oset, NULL);
	(void)sigaction(SIGINT, &oact, NULL);
	putchar('\n');
	return(0);
}

/*
 * Expand the shell escape by expanding unescaped !'s into the
 * last issued command where possible.
 */
int
bangexp(char *str, size_t strsize)
{
	char bangbuf[BUFSIZ];
	static char lastbang[BUFSIZ];
	char *cp, *cp2;
	int n, changed = 0;

	cp = str;
	cp2 = bangbuf;
	n = BUFSIZ;
	while (*cp) {
		if (*cp == '!') {
			if (n < strlen(lastbang)) {
overf:
				puts("Command buffer overflow");
				return(-1);
			}
			changed++;
			strlcpy(cp2, lastbang, sizeof(bangbuf) - (cp2 - bangbuf));
			cp2 += strlen(lastbang);
			n -= strlen(lastbang);
			cp++;
			continue;
		}
		if (*cp == '\\' && cp[1] == '!') {
			if (--n <= 1)
				goto overf;
			*cp2++ = '!';
			cp += 2;
			changed++;
		}
		if (--n <= 1)
			goto overf;
		*cp2++ = *cp++;
	}
	*cp2 = 0;
	if (changed) {
		(void)printf("!%s\n", bangbuf);
		(void)fflush(stdout);
	}
	(void)strlcpy(str, bangbuf, strsize);
	(void)strlcpy(lastbang, bangbuf, sizeof(lastbang));
	return(0);
}

/*
 * Print out a nice help message from some file or another.
 */
int
help(void *v)
{

	(void)run_command(value("PAGER"), 0, -1, -1, _PATH_HELP, NULL);
	return(0);
}

/*
 * Change user's working directory.
 */
int
schdir(void *v)
{
	char **arglist = v;
	char *cp;

	if (*arglist == NULL) {
		if (homedir == NULL)
			return(1);
		cp = homedir;
	} else {
		if ((cp = expand(*arglist)) == NULL)
			return(1);
	}
	if (chdir(cp) < 0) {
		warn("%s", cp);
		return(1);
	}
	return(0);
}

int
respond(void *v)
{
	int *msgvec = v;

	if (value("Replyall") == NULL)
		return(_respond(msgvec));
	else
		return(_Respond(msgvec));
}

/*
 * Reply to a list of messages.  Extract each name from the
 * message header and send them off to mail1()
 */
int
_respond(msgvec)
	int *msgvec;
{
	struct message *mp;
	char *cp, *rcv, *replyto;
	char **ap;
	struct name *np;
	struct header head;

	if (msgvec[1] != 0) {
		puts("Sorry, can't reply to multiple messages at once");
		return(1);
	}
	mp = &message[msgvec[0] - 1];
	touch(mp);
	dot = mp;
	if ((rcv = skin(hfield("from", mp))) == NULL)
		rcv = skin(nameof(mp, 1));
	if ((replyto = skin(hfield("reply-to", mp))) != NULL)
		np = extract(replyto, GTO);
	else if ((cp = skin(hfield("to", mp))) != NULL)
		np = extract(cp, GTO);
	else
		np = NULL;
	/*
	 * Delete my name from the reply list,
	 * and with it, all my alternate names.
	 */
	np = delname(np, myname);
	if (altnames)
		for (ap = altnames; *ap; ap++)
			np = delname(np, *ap);
	if (np != NULL && replyto == NULL)
		np = cat(np, extract(rcv, GTO));
	else if (np == NULL) {
		if (replyto != NULL)
			puts("Empty reply-to field -- replying to author");
		np = extract(rcv, GTO);
	}
	np = elide(np);
	head.h_to = np;
	head.h_from = NULL;
	if ((head.h_subject = hfield("subject", mp)) == NULL)
		head.h_subject = hfield("subj", mp);
	head.h_subject = reedit(head.h_subject);
	if (replyto == NULL && (cp = skin(hfield("cc", mp))) != NULL) {
		np = elide(extract(cp, GCC));
		np = delname(np, myname);
		if (altnames != 0)
			for (ap = altnames; *ap; ap++)
				np = delname(np, *ap);
		head.h_cc = np;
	} else
		head.h_cc = NULL;
	head.h_bcc = NULL;
	head.h_smopts = NULL;
	mail1(&head, 1);
	return(0);
}

/*
 * Modify the subject we are replying to to begin with Re: if
 * it does not already.
 */
char *
reedit(char *subj)
{
	char *newsubj;
	size_t len;

	if (subj == NULL)
		return(NULL);
	if (strncasecmp(subj, "re:", 3) == 0)
		return(subj);
	len = strlen(subj) + 5;
	newsubj = salloc(len);
	strlcpy(newsubj, "Re: ", len);
	strlcat(newsubj, subj, len);
	return(newsubj);
}

/*
 * Mark new the named messages, so that they will be left in the system
 * mailbox as unread.
 */
int
marknew(void *v)
{
	int *msgvec = v;
	int *ip;

	for (ip = msgvec; *ip != 0; ip++) {
		dot = &message[*ip-1];
		dot->m_flag &= ~(MBOX|MREAD|MTOUCH);
		dot->m_flag |= MNEW|MSTATUS;
	}
	return(0);
}

/*
 * Preserve the named messages, so that they will be sent
 * back to the system mailbox.
 */
int
preserve(void *v)
{
	int *msgvec = v;
	int *ip, mesg;
	struct message *mp;

	if (edit) {
		puts("Cannot \"preserve\" in edit mode");
		return(1);
	}
	for (ip = msgvec; *ip != 0; ip++) {
		mesg = *ip;
		mp = &message[mesg-1];
		mp->m_flag |= MPRESERVE;
		mp->m_flag &= ~MBOX;
		dot = mp;
	}
	return(0);
}

/*
 * Mark all given messages as unread.
 */
int
unread(void *v)
{
	int *msgvec = v;
	int *ip;

	for (ip = msgvec; *ip != 0; ip++) {
		dot = &message[*ip-1];
		dot->m_flag &= ~(MREAD|MTOUCH);
		dot->m_flag |= MSTATUS;
	}
	return(0);
}

/*
 * Print the size of each message.
 */
int
messize(void *v)
{
	int *msgvec = v;
	struct message *mp;
	int *ip, mesg;

	for (ip = msgvec; *ip != 0; ip++) {
		mesg = *ip;
		mp = &message[mesg-1];
		printf("%d: %d/%d\n", mesg, mp->m_lines, mp->m_size);
	}
	return(0);
}

/*
 * Quit quickly.  If we are sourcing, just pop the input level
 * by returning an error.
 */
int
rexit(void *v)
{

	if (sourcing)
		return(1);
	exit(0);
	/*NOTREACHED*/
}

/*
 * Set or display a variable value.  Syntax is similar to that
 * of csh.
 */
int
set(void *v)
{
	char **arglist = v;
	struct var *vp;
	char *cp, *cp2;
	char varbuf[BUFSIZ], **ap, **p;
	int errs, h, s;

	if (*arglist == NULL) {
		for (h = 0, s = 1; h < HSHSIZE; h++)
			for (vp = variables[h]; vp != NULL; vp = vp->v_link)
				s++;
		ap = (char **)salloc(s * sizeof(*ap));
		for (h = 0, p = ap; h < HSHSIZE; h++)
			for (vp = variables[h]; vp != NULL; vp = vp->v_link)
				*p++ = vp->v_name;
		*p = NULL;
		sort(ap);
		for (p = ap; *p != NULL; p++)
			printf("%s\t%s\n", *p, value(*p));
		return(0);
	}
	errs = 0;
	for (ap = arglist; *ap != NULL; ap++) {
		cp = *ap;
		cp2 = varbuf;
		while (*cp != '=' && *cp != '\0')
			*cp2++ = *cp++;
		*cp2 = '\0';
		if (*cp == '\0')
			cp = "";
		else
			cp++;
		if (equal(varbuf, "")) {
			puts("Non-null variable name required");
			errs++;
			continue;
		}
		assign(varbuf, cp);
	}
	return(errs);
}

/*
 * Unset a bunch of variable values.
 */
int
unset(void *v)
{
	char **arglist = v;
	struct var *vp, *vp2;
	int errs, h;
	char **ap;

	errs = 0;
	for (ap = arglist; *ap != NULL; ap++) {
		if ((vp2 = lookup(*ap)) == NULL) {
			if (!sourcing) {
				printf("\"%s\": undefined variable\n", *ap);
				errs++;
			}
			continue;
		}
		h = hash(*ap);
		if (vp2 == variables[h]) {
			variables[h] = variables[h]->v_link;
			vfree(vp2->v_name);
			vfree(vp2->v_value);
			(void)free(vp2);
			continue;
		}
		for (vp = variables[h]; vp->v_link != vp2; vp = vp->v_link)
			;
		vp->v_link = vp2->v_link;
		vfree(vp2->v_name);
		vfree(vp2->v_value);
		(void)free(vp2);
	}
	return(errs);
}

/*
 * Put add users to a group.
 */
int
group(void *v)
{
	char **argv = v;
	struct grouphead *gh;
	struct group *gp;
	char **ap, *gname, **p;
	int h, s;

	if (*argv == NULL) {
		for (h = 0, s = 1; h < HSHSIZE; h++)
			for (gh = groups[h]; gh != NULL; gh = gh->g_link)
				s++;
		ap = (char **)salloc(s * sizeof(*ap));
		for (h = 0, p = ap; h < HSHSIZE; h++)
			for (gh = groups[h]; gh != NULL; gh = gh->g_link)
				*p++ = gh->g_name;
		*p = NULL;
		sort(ap);
		for (p = ap; *p != NULL; p++)
			printgroup(*p);
		return(0);
	}
	if (argv[1] == NULL) {
		printgroup(*argv);
		return(0);
	}
	gname = *argv;
	h = hash(gname);
	if ((gh = findgroup(gname)) == NULL) {
		if ((gh = calloc(1, sizeof(*gh))) == NULL)
			err(1, "calloc");
		gh->g_name = vcopy(gname);
		gh->g_list = NULL;
		gh->g_link = groups[h];
		groups[h] = gh;
	}

	/*
	 * Insert names from the command list into the group.
	 * Who cares if there are duplicates?  They get tossed
	 * later anyway.
	 */

	for (ap = argv+1; *ap != NULL; ap++) {
		if ((gp = calloc(1, sizeof(*gp))) == NULL)
			err(1, "calloc");
		gp->ge_name = vcopy(*ap);
		gp->ge_link = gh->g_list;
		gh->g_list = gp;
	}
	return(0);
}

/*
 * Sort the passed string vector into ascending dictionary
 * order.
 */
void
sort(char **list)
{
	char **ap;

	for (ap = list; *ap != NULL; ap++)
		;
	if (ap-list < 2)
		return;
	qsort(list, ap-list, sizeof(*list), diction);
}

/*
 * Do a dictionary order comparison of the arguments from
 * qsort.
 */
static int
diction(const void *a, const void *b)
{

	return(strcmp(*(char **)a, *(char **)b));
}

/*
 * The do nothing command for comments.
 */
/*ARGSUSED*/
int
null(void *v)
{

	return(0);
}

/*
 * Change to another file.  With no argument, print information about
 * the current file.
 */
int
file(void *v)
{
	char **argv = v;

	if (argv[0] == NULL) {
		newfileinfo(0);
		clearnew();
		return(0);
	}
	if (setfile(*argv) < 0)
		return(1);
	announce();
	return(0);
}

/*
 * Expand file names like echo
 */
int
echo(void *v)
{
	char **argv = v;
	char **ap, *cp;

	for (ap = argv; *ap != NULL; ap++) {
		cp = *ap;
		if ((cp = expand(cp)) != NULL) {
			if (ap != argv)
				putchar(' ');
			fputs(cp, stdout);
		}
	}
	putchar('\n');
	return(0);
}

int
Respond(void *v)
{
	int *msgvec = v;

	if (value("Replyall") == NULL)
		return(_Respond(msgvec));
	else
		return(_respond(msgvec));
}

/*
 * Reply to a series of messages by simply mailing to the senders
 * and not messing around with the To: and Cc: lists as in normal
 * reply.
 */
int
_Respond(int *msgvec)
{
	struct header head;
	struct message *mp;
	int *ap;
	char *cp;

	head.h_to = NULL;
	for (ap = msgvec; *ap != 0; ap++) {
		mp = &message[*ap - 1];
		touch(mp);
		dot = mp;
		if ((cp = skin(hfield("from", mp))) == NULL)
			cp = skin(nameof(mp, 2));
		head.h_to = cat(head.h_to, extract(cp, GTO));
	}
	if (head.h_to == NULL)
		return(0);
	mp = &message[msgvec[0] - 1];
	if ((head.h_subject = hfield("subject", mp)) == NULL)
		head.h_subject = hfield("subj", mp);
	head.h_subject = reedit(head.h_subject);
	head.h_from = NULL;
	head.h_cc = NULL;
	head.h_bcc = NULL;
	head.h_smopts = NULL;
	mail1(&head, 1);
	return(0);
}

/*
 * Conditional commands.  These allow one to parameterize one's
 * .mailrc and do some things if sending, others if receiving.
 */
int
ifcmd(void *v)
{
	char **argv = v;
	char *cp;

	if (cond != CANY) {
		puts("Illegal nested \"if\"");
		return(1);
	}
	cond = CANY;
	cp = argv[0];
	switch (*cp) {
	case 'r': case 'R':
		cond = CRCV;
		break;

	case 's': case 'S':
		cond = CSEND;
		break;

	default:
		printf("Unrecognized if-keyword: \"%s\"\n", cp);
		return(1);
	}
	return(0);
}

/*
 * Implement 'else'.  This is pretty simple -- we just
 * flip over the conditional flag.
 */
int
elsecmd(void *v)
{

	switch (cond) {
	case CANY:
		puts("\"Else\" without matching \"if\"");
		return(1);

	case CSEND:
		cond = CRCV;
		break;

	case CRCV:
		cond = CSEND;
		break;

	default:
		puts("mail's idea of conditions is screwed up");
		cond = CANY;
		break;
	}
	return(0);
}

/*
 * End of if statement.  Just set cond back to anything.
 */
int
endifcmd(void *v)
{

	if (cond == CANY) {
		puts("\"Endif\" without matching \"if\"");
		return(1);
	}
	cond = CANY;
	return(0);
}

/*
 * Set the list of alternate names.
 */
int
alternates(void *v)
{
	char **namelist = v;
	char **ap, **ap2;
	int c;

	c = argcount(namelist) + 1;
	if (c == 1) {
		if (altnames == 0)
			return(0);
		for (ap = altnames; *ap; ap++)
			printf("%s ", *ap);
		putchar('\n');
		return(0);
	}
	if (altnames != 0)
		(void)free(altnames);
	if ((altnames = calloc(c, sizeof(char *))) == NULL)
		err(1, "calloc");
	for (ap = namelist, ap2 = altnames; *ap; ap++, ap2++) {
		if ((*ap2 = strdup(*ap)) == NULL)
			err(1, "strdup");
	}
	*ap2 = 0;
	return(0);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: cmd3.c,v 1.27 2015/10/16 17:56:07 mmcc Exp $ */
2			/* $NetBSD: cmd3.c,v 1.8 1997/07/09 05:29:49 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			* Still more user commands.
40			*/
41			static int diction(const void , const void );
42
43			/*
44			* Process a shell escape by saving signals, ignoring signals,
45			* and forking a sh -c
46			*/
47			int
48			shell(void *v)
49			{
50			char *str = v;
51			char *shell;
52			char cmd[BUFSIZ];
53			struct sigaction oact;
54			sigset_t oset;
55
56			(void)ignoresig(SIGINT, &oact, &oset);
57			(void)strlcpy(cmd, str, sizeof(cmd));
58			if (bangexp(cmd, sizeof(cmd)) < 0)
59			return(1);
60			shell = value("SHELL");
61			(void)run_command(shell, 0, 0, -1, "-c", cmd, NULL);
62			(void)sigprocmask(SIG_SETMASK, &oset, NULL);
63			(void)sigaction(SIGINT, &oact, NULL);
64			puts("!");
65			return(0);
66			}
67
68			/*
69			* Fork an interactive shell.
70			*/
71			/ARGSUSED/
72			int
73			dosh(void *v)
74			{
75			char *shell;
76			struct sigaction oact;
77			sigset_t oset;
78
79			shell = value("SHELL");
80			(void)ignoresig(SIGINT, &oact, &oset);
81			(void)run_command(shell, 0, 0, -1, NULL, NULL, NULL);
82			(void)sigprocmask(SIG_SETMASK, &oset, NULL);
83			(void)sigaction(SIGINT, &oact, NULL);
84			putchar('\n');
85			return(0);
86			}
87
88			/*
89			* Expand the shell escape by expanding unescaped !'s into the
90			* last issued command where possible.
91			*/
92			int
93			bangexp(char *str, size_t strsize)
94			{
95			char bangbuf[BUFSIZ];
96			static char lastbang[BUFSIZ];
97			char cp, cp2;
98			int n, changed = 0;
99
100			cp = str;
101			cp2 = bangbuf;
102			n = BUFSIZ;
103			while (*cp) {
104			if (*cp == '!') {
105			if (n < strlen(lastbang)) {
106			overf:
107			puts("Command buffer overflow");
108			return(-1);
109			}
110			changed++;
111			strlcpy(cp2, lastbang, sizeof(bangbuf) - (cp2 - bangbuf));
112			cp2 += strlen(lastbang);
113			n -= strlen(lastbang);
114			cp++;
115			continue;
116			}
117			if (*cp == '\\' && cp[1] == '!') {
118			if (--n <= 1)
119			goto overf;
120			*cp2++ = '!';
121			cp += 2;
122			changed++;
123			}
124			if (--n <= 1)
125			goto overf;
126			cp2++ = cp++;
127			}
128			*cp2 = 0;
129			if (changed) {
130			(void)printf("!%s\n", bangbuf);
131			(void)fflush(stdout);
132			}
133			(void)strlcpy(str, bangbuf, strsize);
134			(void)strlcpy(lastbang, bangbuf, sizeof(lastbang));
135			return(0);
136			}
137
138			/*
139			* Print out a nice help message from some file or another.
140			*/
141			int
142			help(void *v)
143			{
144
145			(void)run_command(value("PAGER"), 0, -1, -1, _PATH_HELP, NULL);
146			return(0);
147			}
148
149			/*
150			* Change user's working directory.
151			*/
152			int
153			schdir(void *v)
154			{
155			char **arglist = v;
156			char *cp;
157
158			if (*arglist == NULL) {
159			if (homedir == NULL)
160			return(1);
161			cp = homedir;
162			} else {
163			if ((cp = expand(*arglist)) == NULL)
164			return(1);
165			}
166			if (chdir(cp) < 0) {
167			warn("%s", cp);
168			return(1);
169			}
170			return(0);
171			}
172
173			int
174			respond(void *v)
175			{
176			int *msgvec = v;
177
178			if (value("Replyall") == NULL)
179			return(_respond(msgvec));
180			else
181			return(_Respond(msgvec));
182			}
183
184			/*
185			* Reply to a list of messages. Extract each name from the
186			* message header and send them off to mail1()
187			*/
188			int
189			_respond(msgvec)
190			int *msgvec;
191			{
192			struct message *mp;
193			char cp, rcv, *replyto;
194			char **ap;
195			struct name *np;
196			struct header head;
197
198			if (msgvec[1] != 0) {
199			puts("Sorry, can't reply to multiple messages at once");
200			return(1);
201			}
202			mp = &message[msgvec[0] - 1];
203			touch(mp);
204			dot = mp;
205			if ((rcv = skin(hfield("from", mp))) == NULL)
206			rcv = skin(nameof(mp, 1));
207			if ((replyto = skin(hfield("reply-to", mp))) != NULL)
208			np = extract(replyto, GTO);
209			else if ((cp = skin(hfield("to", mp))) != NULL)
210			np = extract(cp, GTO);
211			else
212			np = NULL;
213			/*
214			* Delete my name from the reply list,
215			* and with it, all my alternate names.
216			*/
217			np = delname(np, myname);
218			if (altnames)
219			for (ap = altnames; *ap; ap++)
220			np = delname(np, *ap);
221			if (np != NULL && replyto == NULL)
222			np = cat(np, extract(rcv, GTO));
223			else if (np == NULL) {
224			if (replyto != NULL)
225			puts("Empty reply-to field -- replying to author");
226			np = extract(rcv, GTO);
227			}
228			np = elide(np);
229			head.h_to = np;
230			head.h_from = NULL;
231			if ((head.h_subject = hfield("subject", mp)) == NULL)
232			head.h_subject = hfield("subj", mp);
233			head.h_subject = reedit(head.h_subject);
234			if (replyto == NULL && (cp = skin(hfield("cc", mp))) != NULL) {
235			np = elide(extract(cp, GCC));
236			np = delname(np, myname);
237			if (altnames != 0)
238			for (ap = altnames; *ap; ap++)
239			np = delname(np, *ap);
240			head.h_cc = np;
241			} else
242			head.h_cc = NULL;
243			head.h_bcc = NULL;
244			head.h_smopts = NULL;
245			mail1(&head, 1);
246			return(0);
247			}
248
249			/*
250			* Modify the subject we are replying to to begin with Re: if
251			* it does not already.
252			*/
253			char *
254			reedit(char *subj)
255			{
256			char *newsubj;
257			size_t len;
258
259			if (subj == NULL)
260			return(NULL);
261			if (strncasecmp(subj, "re:", 3) == 0)
262			return(subj);
263			len = strlen(subj) + 5;
264			newsubj = salloc(len);
265			strlcpy(newsubj, "Re: ", len);
266			strlcat(newsubj, subj, len);
267			return(newsubj);
268			}
269
270			/*
271			* Mark new the named messages, so that they will be left in the system
272			* mailbox as unread.
273			*/
274			int
275			marknew(void *v)
276			{
277			int *msgvec = v;
278			int *ip;
279
280			for (ip = msgvec; *ip != 0; ip++) {
281			dot = &message[*ip-1];
282			dot->m_flag &= ~(MBOX\|MREAD\|MTOUCH);
283			dot->m_flag \|= MNEW\|MSTATUS;
284			}
285			return(0);
286			}
287
288			/*
289			* Preserve the named messages, so that they will be sent
290			* back to the system mailbox.
291			*/
292			int
293			preserve(void *v)
294			{
295			int *msgvec = v;
296			int *ip, mesg;
297			struct message *mp;
298
299			if (edit) {
300			puts("Cannot \"preserve\" in edit mode");
301			return(1);
302			}
303			for (ip = msgvec; *ip != 0; ip++) {
304			mesg = *ip;
305			mp = &message[mesg-1];
306			mp->m_flag \|= MPRESERVE;
307			mp->m_flag &= ~MBOX;
308			dot = mp;
309			}
310			return(0);
311			}
312
313			/*
314			* Mark all given messages as unread.
315			*/
316			int
317			unread(void *v)
318			{
319			int *msgvec = v;
320			int *ip;
321
322			for (ip = msgvec; *ip != 0; ip++) {
323			dot = &message[*ip-1];
324			dot->m_flag &= ~(MREAD\|MTOUCH);
325			dot->m_flag \|= MSTATUS;
326			}
327			return(0);
328			}
329
330			/*
331			* Print the size of each message.
332			*/
333			int
334			messize(void *v)
335			{
336			int *msgvec = v;
337			struct message *mp;
338			int *ip, mesg;
339
340			for (ip = msgvec; *ip != 0; ip++) {
341			mesg = *ip;
342			mp = &message[mesg-1];
343			printf("%d: %d/%d\n", mesg, mp->m_lines, mp->m_size);
344			}
345			return(0);
346			}
347
348			/*
349			* Quit quickly. If we are sourcing, just pop the input level
350			* by returning an error.
351			*/
352			int
353			rexit(void *v)
354			{
355
356			if (sourcing)
357			return(1);
358			exit(0);
359			/NOTREACHED/
360			}
361
362			/*
363			* Set or display a variable value. Syntax is similar to that
364			* of csh.
365			*/
366			int
367			set(void *v)
368			{
369			char **arglist = v;
370			struct var *vp;
371			char cp, cp2;
372			char varbuf[BUFSIZ], ap, p;
373			int errs, h, s;
374
375			if (*arglist == NULL) {
376			for (h = 0, s = 1; h < HSHSIZE; h++)
377			for (vp = variables[h]; vp != NULL; vp = vp->v_link)
378			s++;
379			ap = (char *)salloc(s sizeof(*ap));
380			for (h = 0, p = ap; h < HSHSIZE; h++)
381			for (vp = variables[h]; vp != NULL; vp = vp->v_link)
382			*p++ = vp->v_name;
383			*p = NULL;
384			sort(ap);
385			for (p = ap; *p != NULL; p++)
386			printf("%s\t%s\n", p, value(p));
387			return(0);
388			}
389			errs = 0;
390			for (ap = arglist; *ap != NULL; ap++) {
391			cp = *ap;
392			cp2 = varbuf;
393			while (cp != '=' && cp != '\0')
394			cp2++ = cp++;
395			*cp2 = '\0';
396			if (*cp == '\0')
397			cp = "";
398			else
399			cp++;
400			if (equal(varbuf, "")) {
401			puts("Non-null variable name required");
402			errs++;
403			continue;
404			}
405			assign(varbuf, cp);
406			}
407			return(errs);
408			}
409
410			/*
411			* Unset a bunch of variable values.
412			*/
413			int
414			unset(void *v)
415			{
416			char **arglist = v;
417			struct var vp, vp2;
418			int errs, h;
419			char **ap;
420
421			errs = 0;
422			for (ap = arglist; *ap != NULL; ap++) {
423			if ((vp2 = lookup(*ap)) == NULL) {
424			if (!sourcing) {
425			printf("\"%s\": undefined variable\n", *ap);
426			errs++;
427			}
428			continue;
429			}
430			h = hash(*ap);
431			if (vp2 == variables[h]) {
432			variables[h] = variables[h]->v_link;
433			vfree(vp2->v_name);
434			vfree(vp2->v_value);
435			(void)free(vp2);
436			continue;
437			}
438			for (vp = variables[h]; vp->v_link != vp2; vp = vp->v_link)
439			;
440			vp->v_link = vp2->v_link;
441			vfree(vp2->v_name);
442			vfree(vp2->v_value);
443			(void)free(vp2);
444			}
445			return(errs);
446			}
447
448			/*
449			* Put add users to a group.
450			*/
451			int
452			group(void *v)
453			{
454			char **argv = v;
455			struct grouphead *gh;
456			struct group *gp;
457			char *ap, gname, **p;
458			int h, s;
459
460			if (*argv == NULL) {
461			for (h = 0, s = 1; h < HSHSIZE; h++)
462			for (gh = groups[h]; gh != NULL; gh = gh->g_link)
463			s++;
464			ap = (char *)salloc(s sizeof(*ap));
465			for (h = 0, p = ap; h < HSHSIZE; h++)
466			for (gh = groups[h]; gh != NULL; gh = gh->g_link)
467			*p++ = gh->g_name;
468			*p = NULL;
469			sort(ap);
470			for (p = ap; *p != NULL; p++)
471			printgroup(*p);
472			return(0);
473			}
474			if (argv[1] == NULL) {
475			printgroup(*argv);
476			return(0);
477			}
478			gname = *argv;
479			h = hash(gname);
480			if ((gh = findgroup(gname)) == NULL) {
481			if ((gh = calloc(1, sizeof(*gh))) == NULL)
482			err(1, "calloc");
483			gh->g_name = vcopy(gname);
484			gh->g_list = NULL;
485			gh->g_link = groups[h];
486			groups[h] = gh;
487			}
488
489			/*
490			* Insert names from the command list into the group.
491			* Who cares if there are duplicates? They get tossed
492			* later anyway.
493			*/
494
495			for (ap = argv+1; *ap != NULL; ap++) {
496			if ((gp = calloc(1, sizeof(*gp))) == NULL)
497			err(1, "calloc");
498			gp->ge_name = vcopy(*ap);
499			gp->ge_link = gh->g_list;
500			gh->g_list = gp;
501			}
502			return(0);
503			}
504
505			/*
506			* Sort the passed string vector into ascending dictionary
507			* order.
508			*/
509			void
510			sort(char **list)
511			{
512			char **ap;
513
514			for (ap = list; *ap != NULL; ap++)
515			;
516			if (ap-list < 2)
517			return;
518			qsort(list, ap-list, sizeof(*list), diction);
519			}
520
521			/*
522			* Do a dictionary order comparison of the arguments from
523			* qsort.
524			*/
525			static int
526			diction(const void a, const void b)
527			{
528
529			return(strcmp((char )a, (char **)b));
530			}
531
532			/*
533			* The do nothing command for comments.
534			*/
535			/ARGSUSED/
536			int
537			null(void *v)
538			{
539
540			return(0);
541			}
542
543			/*
544			* Change to another file. With no argument, print information about
545			* the current file.
546			*/
547			int
548			file(void *v)
549			{
550			char **argv = v;
551
552			if (argv[0] == NULL) {
553			newfileinfo(0);
554			clearnew();
555			return(0);
556			}
557			if (setfile(*argv) < 0)
558			return(1);
559			announce();
560			return(0);
561			}
562
563			/*
564			* Expand file names like echo
565			*/
566			int
567			echo(void *v)
568			{
569			char **argv = v;
570			char *ap, cp;
571
572			for (ap = argv; *ap != NULL; ap++) {
573			cp = *ap;
574			if ((cp = expand(cp)) != NULL) {
575			if (ap != argv)
576			putchar(' ');
577			fputs(cp, stdout);
578			}
579			}
580			putchar('\n');
581			return(0);
582			}
583
584			int
585			Respond(void *v)
586			{
587			int *msgvec = v;
588
589			if (value("Replyall") == NULL)
590			return(_Respond(msgvec));
591			else
592			return(_respond(msgvec));
593			}
594
595			/*
596			* Reply to a series of messages by simply mailing to the senders
597			* and not messing around with the To: and Cc: lists as in normal
598			* reply.
599			*/
600			int
601			_Respond(int *msgvec)
602			{
603			struct header head;
604			struct message *mp;
605			int *ap;
606			char *cp;
607
608			head.h_to = NULL;
609			for (ap = msgvec; *ap != 0; ap++) {
610			mp = &message[*ap - 1];
611			touch(mp);
612			dot = mp;
613			if ((cp = skin(hfield("from", mp))) == NULL)
614			cp = skin(nameof(mp, 2));
615			head.h_to = cat(head.h_to, extract(cp, GTO));
616			}
617			if (head.h_to == NULL)
618			return(0);
619			mp = &message[msgvec[0] - 1];
620			if ((head.h_subject = hfield("subject", mp)) == NULL)
621			head.h_subject = hfield("subj", mp);
622			head.h_subject = reedit(head.h_subject);
623			head.h_from = NULL;
624			head.h_cc = NULL;
625			head.h_bcc = NULL;
626			head.h_smopts = NULL;
627			mail1(&head, 1);
628			return(0);
629			}
630
631			/*
632			* Conditional commands. These allow one to parameterize one's
633			* .mailrc and do some things if sending, others if receiving.
634			*/
635			int
636			ifcmd(void *v)
637			{
638			char **argv = v;
639			char *cp;
640
641			if (cond != CANY) {
642			puts("Illegal nested \"if\"");
643			return(1);
644			}
645			cond = CANY;
646			cp = argv[0];
647			switch (*cp) {
648			case 'r': case 'R':
649			cond = CRCV;
650			break;
651
652			case 's': case 'S':
653			cond = CSEND;
654			break;
655
656			default:
657			printf("Unrecognized if-keyword: \"%s\"\n", cp);
658			return(1);
659			}
660			return(0);
661			}
662
663			/*
664			* Implement 'else'. This is pretty simple -- we just
665			* flip over the conditional flag.
666			*/
667			int
668			elsecmd(void *v)
669			{
670
671			switch (cond) {
672			case CANY:
673			puts("\"Else\" without matching \"if\"");
674			return(1);
675
676			case CSEND:
677			cond = CRCV;
678			break;
679
680			case CRCV:
681			cond = CSEND;
682			break;
683
684			default:
685			puts("mail's idea of conditions is screwed up");
686			cond = CANY;
687			break;
688			}
689			return(0);
690			}
691
692			/*
693			* End of if statement. Just set cond back to anything.
694			*/
695			int
696			endifcmd(void *v)
697			{
698
699			if (cond == CANY) {
700			puts("\"Endif\" without matching \"if\"");
701			return(1);
702			}
703			cond = CANY;
704			return(0);
705			}
706
707			/*
708			* Set the list of alternate names.
709			*/
710			int
711			alternates(void *v)
712			{
713			char **namelist = v;
714			char ap, ap2;
715			int c;
716
717			c = argcount(namelist) + 1;
718			if (c == 1) {
719			if (altnames == 0)
720			return(0);
721			for (ap = altnames; *ap; ap++)
722			printf("%s ", *ap);
723			putchar('\n');
724			return(0);
725			}
726			if (altnames != 0)
727			(void)free(altnames);
728			if ((altnames = calloc(c, sizeof(char *))) == NULL)
729			err(1, "calloc");
730			for (ap = namelist, ap2 = altnames; *ap; ap++, ap2++) {
731			if ((ap2 = strdup(ap)) == NULL)
732			err(1, "strdup");
733			}
734			*ap2 = 0;
735			return(0);
736			}