freebsd-dev/usr.bin/mail/cmd3.c

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/*-
* SPDX-License-Identifier: BSD-3-Clause
*
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* 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
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* 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
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#endif /* not lint */
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#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
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#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
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shell(char *str)
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{
sig_t sigint = signal(SIGINT, SIG_IGN);
char *sh;
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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);
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printf("!\n");
return (0);
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}
/*
* Fork an interactive shell.
*/
/*ARGSUSED*/
int
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dosh(char *str __unused)
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{
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);
(void)signal(SIGINT, sigint);
printf("\n");
return (0);
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}
/*
* Expand the shell escape by expanding unescaped !'s into the
* last issued command where possible.
*/
int
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bangexp(char *str, size_t strsize)
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{
char bangbuf[BUFSIZ];
static char lastbang[BUFSIZ];
char *cp, *cp2;
int n, changed = 0;
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cp = str;
cp2 = bangbuf;
n = sizeof(bangbuf);
while (*cp != '\0') {
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if (*cp == '!') {
if (n < (int)strlen(lastbang)) {
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overf:
printf("Command buffer overflow\n");
return (-1);
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}
changed++;
if (strlcpy(cp2, lastbang, sizeof(bangbuf) - (cp2 - bangbuf))
>= sizeof(bangbuf) - (cp2 - bangbuf))
goto overf;
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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);
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}
if (strlcpy(str, bangbuf, strsize) >= strsize)
goto overf;
if (strlcpy(lastbang, bangbuf, sizeof(lastbang)) >= sizeof(lastbang))
goto overf;
return (0);
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}
/*
* Print out a nice help message from some file or another.
*/
int
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help(void)
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{
int c;
FILE *f;
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if ((f = Fopen(_PATH_HELP, "r")) == NULL) {
warn("%s", _PATH_HELP);
return (1);
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}
while ((c = getc(f)) != EOF)
putchar(c);
(void)Fclose(f);
return (0);
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}
/*
* Change user's working directory.
*/
int
schdir(void *v)
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{
char **arglist = v;
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char *cp;
if (*arglist == NULL) {
if (homedir == NULL)
return (1);
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cp = homedir;
} else
if ((cp = expand(*arglist)) == NULL)
return (1);
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if (chdir(cp) < 0) {
warn("%s", cp);
return (1);
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}
return (0);
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}
int
respond(void *v)
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{
int *msgvec = v;
if (value("Replyall") == NULL && value("flipr") == NULL)
return (dorespond(msgvec));
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else
return (doRespond(msgvec));
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}
/*
* Reply to a list of messages. Extract each name from the
* message header and send them off to mail1()
*/
int
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dorespond(int *msgvec)
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{
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);
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}
mp = &message[msgvec[0] - 1];
touch(mp);
dot = mp;
if ((rcv = skin(hfield("from", mp))) == NULL)
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rcv = skin(nameof(mp, 1));
if ((replyto = skin(hfield("reply-to", mp))) != NULL)
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np = extract(replyto, GTO);
else if ((cp = skin(hfield("to", mp))) != NULL)
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np = extract(cp, GTO);
else
np = NULL;
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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++)
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np = delname(np, *ap);
if (np != NULL && replyto == NULL)
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np = cat(np, extract(rcv, GTO));
else if (np == NULL) {
if (replyto != NULL)
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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)
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head.h_subject = hfield("subj", mp);
head.h_subject = reedit(head.h_subject);
if (replyto == NULL && (cp = skin(hfield("cc", mp))) != NULL) {
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np = elide(extract(cp, GCC));
np = delname(np, myname);
if (altnames != 0)
for (ap = altnames; *ap != NULL; ap++)
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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));
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mail1(&head, 1);
return (0);
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}
/*
* Modify the message subject to begin with "Re:" if
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* it does not already.
*/
char *
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reedit(char *subj)
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{
char *newsubj;
if (subj == NULL)
return (NULL);
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if ((subj[0] == 'r' || subj[0] == 'R') &&
(subj[1] == 'e' || subj[1] == 'E') &&
subj[2] == ':')
return (subj);
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newsubj = salloc(strlen(subj) + 5);
sprintf(newsubj, "Re: %s", subj);
return (newsubj);
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}
/*
* Preserve the named messages, so that they will be sent
* back to the system mailbox.
*/
int
preserve(void *v)
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{
int *msgvec = v;
int *ip, mesg;
struct message *mp;
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if (edit) {
printf("Cannot \"preserve\" in edit mode\n");
return (1);
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}
for (ip = msgvec; *ip != 0; ip++) {
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mesg = *ip;
mp = &message[mesg-1];
mp->m_flag |= MPRESERVE;
mp->m_flag &= ~MBOX;
dot = mp;
}
return (0);
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}
/*
* Mark all given messages as unread.
*/
int
unread(void *v)
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{
int *msgvec = v;
int *ip;
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for (ip = msgvec; *ip != 0; ip++) {
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dot = &message[*ip-1];
dot->m_flag &= ~(MREAD|MTOUCH);
dot->m_flag |= MSTATUS;
}
return (0);
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}
/*
* Print the size of each message.
*/
int
messize(void *v)
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{
int *msgvec = v;
struct message *mp;
int *ip, mesg;
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for (ip = msgvec; *ip != 0; ip++) {
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mesg = *ip;
mp = &message[mesg-1];
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printf("%d: %ld/%ld\n", mesg, mp->m_lines, mp->m_size);
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}
return (0);
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}
/*
* Quit quickly. If we are sourcing, just pop the input level
* by returning an error.
*/
int
rexit(void *v)
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{
if (sourcing)
return (1);
exit(0);
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/*NOTREACHED*/
}
/*
* Set or display a variable value. Syntax is similar to that
* of csh.
*/
int
set(void *v)
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{
char **arglist = v;
struct var *vp;
char *cp, *cp2;
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char varbuf[BUFSIZ], **ap, **p;
int errs, h, s;
if (*arglist == NULL) {
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for (h = 0, s = 1; h < HSHSIZE; h++)
for (vp = variables[h]; vp != NULL; vp = vp->v_link)
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s++;
ap = (char **)salloc(s * sizeof(*ap));
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for (h = 0, p = ap; h < HSHSIZE; h++)
for (vp = variables[h]; vp != NULL; vp = vp->v_link)
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*p++ = vp->v_name;
*p = NULL;
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sort(ap);
for (p = ap; *p != NULL; p++)
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printf("%s\t%s\n", *p, value(*p));
return (0);
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}
errs = 0;
for (ap = arglist; *ap != NULL; ap++) {
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cp = *ap;
cp2 = varbuf;
while (cp2 < varbuf + sizeof(varbuf) - 1 && *cp != '=' && *cp != '\0')
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*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);
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}
/*
* Unset a bunch of variable values.
*/
int
unset(void *v)
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{
char **arglist = v;
struct var *vp, *vp2;
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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) {
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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);
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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);
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}
return (errs);
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}
/*
* Put add users to a group.
*/
int
group(void *v)
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{
char **argv = v;
struct grouphead *gh;
struct group *gp;
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char **ap, *gname, **p;
int h, s;
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if (*argv == NULL) {
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for (h = 0, s = 1; h < HSHSIZE; h++)
for (gh = groups[h]; gh != NULL; gh = gh->g_link)
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s++;
ap = (char **)salloc(s * sizeof(*ap));
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for (h = 0, p = ap; h < HSHSIZE; h++)
for (gh = groups[h]; gh != NULL; gh = gh->g_link)
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*p++ = gh->g_name;
*p = NULL;
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sort(ap);
for (p = ap; *p != NULL; p++)
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printgroup(*p);
return (0);
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}
if (argv[1] == NULL) {
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printgroup(*argv);
return (0);
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}
gname = *argv;
h = hash(gname);
if ((gh = findgroup(gname)) == NULL) {
if ((gh = calloc(1, sizeof(*gh))) == NULL)
err(1, "Out of memory");
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gh->g_name = vcopy(gname);
gh->g_list = NULL;
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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, "Out of memory");
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gp->ge_name = vcopy(*ap);
gp->ge_link = gh->g_list;
gh->g_list = gp;
}
return (0);
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}
/*
* Sort the passed string vecotor into ascending dictionary
* order.
*/
void
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sort(char **list)
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{
char **ap;
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for (ap = list; *ap != NULL; ap++)
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;
if (ap-list < 2)
return;
qsort(list, ap-list, sizeof(*list), diction);
}
/*
* Do a dictionary order comparison of the arguments from
* qsort.
*/
int
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diction(const void *a, const void *b)
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{
return (strcmp(*(const char **)a, *(const char **)b));
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}
/*
* The do nothing command for comments.
*/
/*ARGSUSED*/
int
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null(int e __unused)
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{
return (0);
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}
/*
* Change to another file. With no argument, print information about
* the current file.
*/
int
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file(char **argv)
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{
if (argv[0] == NULL) {
newfileinfo(0);
return (0);
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}
if (setfile(*argv) < 0)
return (1);
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announce();
return (0);
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}
/*
* Expand file names like echo
*/
int
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echo(char **argv)
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{
char **ap, *cp;
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for (ap = argv; *ap != NULL; ap++) {
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cp = *ap;
if ((cp = expand(cp)) != NULL) {
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if (ap != argv)
printf(" ");
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printf("%s", cp);
}
}
printf("\n");
return (0);
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}
int
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Respond(int *msgvec)
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{
if (value("Replyall") == NULL && value("flipr") == NULL)
return (doRespond(msgvec));
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else
return (dorespond(msgvec));
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}
/*
* 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
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doRespond(int msgvec[])
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{
struct header head;
struct message *mp;
int *ap;
char *cp, *mid;
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head.h_to = NULL;
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for (ap = msgvec; *ap != 0; ap++) {
mp = &message[*ap - 1];
touch(mp);
dot = mp;
if ((cp = skin(hfield("from", mp))) == NULL)
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cp = skin(nameof(mp, 2));
head.h_to = cat(head.h_to, extract(cp, GTO));
mid = skin(hfield("message-id", mp));
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}
if (head.h_to == NULL)
return (0);
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mp = &message[msgvec[0] - 1];
if ((head.h_subject = hfield("subject", mp)) == NULL)
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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;
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mail1(&head, 1);
return (0);
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}
/*
* Conditional commands. These allow one to parameterize one's
* .mailrc and do some things if sending, others if receiving.
*/
int
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ifcmd(char **argv)
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{
char *cp;
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if (cond != CANY) {
printf("Illegal nested \"if\"\n");
return (1);
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}
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);
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}
return (0);
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}
/*
* Implement 'else'. This is pretty simple -- we just
* flip over the conditional flag.
*/
int
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elsecmd(void)
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{
switch (cond) {
case CANY:
printf("\"Else\" without matching \"if\"\n");
return (1);
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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);
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}
/*
* End of if statement. Just set cond back to anything.
*/
int
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endifcmd(void)
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{
if (cond == CANY) {
printf("\"Endif\" without matching \"if\"\n");
return (1);
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}
cond = CANY;
return (0);
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}
/*
* Set the list of alternate names.
*/
int
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alternates(char **namelist)
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{
int c;
char **ap, **ap2, *cp;
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c = argcount(namelist) + 1;
if (c == 1) {
if (altnames == 0)
return (0);
for (ap = altnames; *ap != NULL; ap++)
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printf("%s ", *ap);
printf("\n");
return (0);
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}
if (altnames != 0)
(void)free(altnames);
if ((altnames = calloc((unsigned)c, sizeof(char *))) == NULL)
err(1, "Out of memory");
for (ap = namelist, ap2 = altnames; *ap != NULL; ap++, ap2++) {
cp = calloc((unsigned)strlen(*ap) + 1, sizeof(char));
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strcpy(cp, *ap);
*ap2 = cp;
}
*ap2 = 0;
return (0);
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}