FreeBSD-5.3/usr.bin/mail/cmd3.c
/*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
#ifndef lint
#if 0
static char sccsid[] = "@(#)cmd3.c 8.2 (Berkeley) 4/20/95";
#endif
#endif /* not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/usr.bin/mail/cmd3.c,v 1.10 2002/06/30 05:25:06 obrien Exp $");
#include "rcv.h"
#include "extern.h"
/*
* Mail -- a mail program
*
* Still more user commands.
*/
/*
* Process a shell escape by saving signals, ignoring signals,
* and forking a sh -c
*/
int
shell(str)
char *str;
{
sig_t sigint = signal(SIGINT, SIG_IGN);
char *sh;
char cmd[BUFSIZ];
if (strlcpy(cmd, str, sizeof(cmd)) >= sizeof(cmd))
return (1);
if (bangexp(cmd, sizeof(cmd)) < 0)
return (1);
if ((sh = value("SHELL")) == NULL)
sh = _PATH_CSHELL;
(void)run_command(sh, 0, -1, -1, "-c", cmd, NULL);
(void)signal(SIGINT, sigint);
printf("!\n");
return (0);
}
/*
* Fork an interactive shell.
*/
/*ARGSUSED*/
int
dosh(str)
char *str;
{
sig_t sigint = signal(SIGINT, SIG_IGN);
char *sh;
if ((sh = value("SHELL")) == NULL)
sh = _PATH_CSHELL;
(void)run_command(sh, 0, -1, -1, NULL, NULL, NULL);
(void)signal(SIGINT, sigint);
printf("\n");
return (0);
}
/*
* Expand the shell escape by expanding unescaped !'s into the
* last issued command where possible.
*/
int
bangexp(str, strsize)
char *str;
size_t strsize;
{
char bangbuf[BUFSIZ];
static char lastbang[BUFSIZ];
char *cp, *cp2;
int n, changed = 0;
cp = str;
cp2 = bangbuf;
n = sizeof(bangbuf);
while (*cp != '\0') {
if (*cp == '!') {
if (n < strlen(lastbang)) {
overf:
printf("Command buffer overflow\n");
return (-1);
}
changed++;
if (strlcpy(cp2, lastbang, sizeof(bangbuf) - (cp2 - bangbuf))
>= sizeof(bangbuf) - (cp2 - bangbuf))
goto overf;
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) {
printf("!%s\n", bangbuf);
(void)fflush(stdout);
}
if (strlcpy(str, bangbuf, strsize) >= strsize)
goto overf;
if (strlcpy(lastbang, bangbuf, sizeof(lastbang)) >= sizeof(lastbang))
goto overf;
return (0);
}
/*
* Print out a nice help message from some file or another.
*/
int
help()
{
int c;
FILE *f;
if ((f = Fopen(_PATH_HELP, "r")) == NULL) {
warn("%s", _PATH_HELP);
return (1);
}
while ((c = getc(f)) != EOF)
putchar(c);
(void)Fclose(f);
return (0);
}
/*
* Change user's working directory.
*/
int
schdir(arglist)
char **arglist;
{
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(msgvec)
int *msgvec;
{
if (value("Replyall") == NULL && value("flipr") == NULL)
return (dorespond(msgvec));
else
return (doRespond(msgvec));
}
/*
* Reply to a list of messages. Extract each name from the
* message header and send them off to mail1()
*/
int
dorespond(msgvec)
int *msgvec;
{
struct message *mp;
char *cp, *rcv, *replyto;
char **ap;
struct name *np;
struct header head;
if (msgvec[1] != 0) {
printf("Sorry, can't reply to multiple messages at once\n");
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;
np = elide(np);
/*
* Delete my name from the reply list,
* and with it, all my alternate names.
*/
np = delname(np, myname);
if (altnames)
for (ap = altnames; *ap != NULL; ap++)
np = delname(np, *ap);
if (np != NULL && replyto == NULL)
np = cat(np, extract(rcv, GTO));
else if (np == NULL) {
if (replyto != NULL)
printf("Empty reply-to field -- replying to author\n");
np = extract(rcv, GTO);
}
head.h_to = np;
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 != NULL; ap++)
np = delname(np, *ap);
head.h_cc = np;
} else
head.h_cc = NULL;
head.h_bcc = NULL;
head.h_smopts = NULL;
head.h_replyto = value("REPLYTO");
head.h_inreplyto = skin(hfield("message-id", mp));
mail1(&head, 1);
return (0);
}
/*
* Modify the subject we are replying to to begin with Re: if
* it does not already.
*/
char *
reedit(subj)
char *subj;
{
char *newsubj;
if (subj == NULL)
return (NULL);
if ((subj[0] == 'r' || subj[0] == 'R') &&
(subj[1] == 'e' || subj[1] == 'E') &&
subj[2] == ':')
return (subj);
newsubj = salloc(strlen(subj) + 5);
sprintf(newsubj, "Re: %s", subj);
return (newsubj);
}
/*
* Preserve the named messages, so that they will be sent
* back to the system mailbox.
*/
int
preserve(msgvec)
int *msgvec;
{
int *ip, mesg;
struct message *mp;
if (edit) {
printf("Cannot \"preserve\" in edit mode\n");
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(msgvec)
int msgvec[];
{
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(msgvec)
int *msgvec;
{
struct message *mp;
int *ip, mesg;
for (ip = msgvec; *ip != 0; ip++) {
mesg = *ip;
mp = &message[mesg-1];
printf("%d: %ld/%ld\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(e)
int e;
{
if (sourcing)
return (1);
exit(0);
/*NOTREACHED*/
}
/*
* Set or display a variable value. Syntax is similar to that
* of csh.
*/
int
set(arglist)
char **arglist;
{
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 (cp2 < varbuf + sizeof(varbuf) - 1 && *cp != '=' && *cp != '\0')
*cp2++ = *cp++;
*cp2 = '\0';
if (*cp == '\0')
cp = "";
else
cp++;
if (equal(varbuf, "")) {
printf("Non-null variable name required\n");
errs++;
continue;
}
assign(varbuf, cp);
}
return (errs);
}
/*
* Unset a bunch of variable values.
*/
int
unset(arglist)
char **arglist;
{
struct var *vp, *vp2;
int errs, h;
char **ap;
errs = 0;
for (ap = arglist; *ap != NULL; ap++) {
if ((vp2 = lookup(*ap)) == NULL) {
if (getenv(*ap))
unsetenv(*ap);
else 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(argv)
char **argv;
{
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) {
gh = calloc(sizeof(*gh), 1);
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++) {
gp = calloc(sizeof(*gp), 1);
gp->ge_name = vcopy(*ap);
gp->ge_link = gh->g_list;
gh->g_list = gp;
}
return (0);
}
/*
* Sort the passed string vecotor into ascending dictionary
* order.
*/
void
sort(list)
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.
*/
int
diction(a, b)
const void *a, *b;
{
return (strcmp(*(const char **)a, *(const char **)b));
}
/*
* The do nothing command for comments.
*/
/*ARGSUSED*/
int
null(e)
int e;
{
return (0);
}
/*
* Change to another file. With no argument, print information about
* the current file.
*/
int
file(argv)
char **argv;
{
if (argv[0] == NULL) {
newfileinfo(0);
return (0);
}
if (setfile(*argv) < 0)
return (1);
announce();
return (0);
}
/*
* Expand file names like echo
*/
int
echo(argv)
char **argv;
{
char **ap, *cp;
for (ap = argv; *ap != NULL; ap++) {
cp = *ap;
if ((cp = expand(cp)) != NULL) {
if (ap != argv)
printf(" ");
printf("%s", cp);
}
}
printf("\n");
return (0);
}
int
Respond(msgvec)
int *msgvec;
{
if (value("Replyall") == NULL && value("flipr") == NULL)
return (doRespond(msgvec));
else
return (dorespond(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
doRespond(msgvec)
int msgvec[];
{
struct header head;
struct message *mp;
int *ap;
char *cp, *mid;
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));
mid = skin(hfield("message-id", mp));
}
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_cc = NULL;
head.h_bcc = NULL;
head.h_smopts = NULL;
head.h_replyto = value("REPLYTO");
head.h_inreplyto = mid;
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(argv)
char **argv;
{
char *cp;
if (cond != CANY) {
printf("Illegal nested \"if\"\n");
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()
{
switch (cond) {
case CANY:
printf("\"Else\" without matching \"if\"\n");
return (1);
case CSEND:
cond = CRCV;
break;
case CRCV:
cond = CSEND;
break;
default:
printf("Mail's idea of conditions is screwed up\n");
cond = CANY;
break;
}
return (0);
}
/*
* End of if statement. Just set cond back to anything.
*/
int
endifcmd()
{
if (cond == CANY) {
printf("\"Endif\" without matching \"if\"\n");
return (1);
}
cond = CANY;
return (0);
}
/*
* Set the list of alternate names.
*/
int
alternates(namelist)
char **namelist;
{
int c;
char **ap, **ap2, *cp;
c = argcount(namelist) + 1;
if (c == 1) {
if (altnames == 0)
return (0);
for (ap = altnames; *ap != NULL; ap++)
printf("%s ", *ap);
printf("\n");
return (0);
}
if (altnames != 0)
(void)free(altnames);
altnames = calloc((unsigned)c, sizeof(char *));
for (ap = namelist, ap2 = altnames; *ap != NULL; ap++, ap2++) {
cp = calloc((unsigned)strlen(*ap) + 1, sizeof(char));
strcpy(cp, *ap);
*ap2 = cp;
}
*ap2 = 0;
return (0);
}