4.3BSD/usr/src/ucb/Mail/cmd3.c
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#ifndef lint
static char *sccsid = "@(#)cmd3.c 5.3 (Berkeley) 9/15/85";
#endif not lint
#include "rcv.h"
#include <sys/stat.h>
/*
* Mail -- a mail program
*
* Still more user commands.
*/
/*
* Process a shell escape by saving signals, ignoring signals,
* and forking a sh -c
*/
shell(str)
char *str;
{
int (*sig[2])(), stat[1];
register int t;
char *Shell;
char cmd[BUFSIZ];
strcpy(cmd, str);
if (bangexp(cmd) < 0)
return(-1);
if ((Shell = value("SHELL")) == NOSTR)
Shell = SHELL;
for (t = 2; t < 4; t++)
sig[t-2] = sigset(t, SIG_IGN);
t = vfork();
if (t == 0) {
sigchild();
for (t = 2; t < 4; t++)
if (sig[t-2] != SIG_IGN)
sigsys(t, SIG_DFL);
execl(Shell, Shell, "-c", cmd, (char *)0);
perror(Shell);
_exit(1);
}
while (wait(stat) != t)
;
if (t == -1)
perror("fork");
for (t = 2; t < 4; t++)
sigset(t, sig[t-2]);
printf("!\n");
return(0);
}
/*
* Fork an interactive shell.
*/
dosh(str)
char *str;
{
int (*sig[2])(), stat[1];
register int t;
char *Shell;
if ((Shell = value("SHELL")) == NOSTR)
Shell = SHELL;
for (t = 2; t < 4; t++)
sig[t-2] = sigset(t, SIG_IGN);
t = vfork();
if (t == 0) {
sigchild();
for (t = 2; t < 4; t++)
if (sig[t-2] != SIG_IGN)
sigsys(t, SIG_DFL);
execl(Shell, Shell, (char *)0);
perror(Shell);
_exit(1);
}
while (wait(stat) != t)
;
if (t == -1)
perror("fork");
for (t = 2; t < 4; t++)
sigsys(t, sig[t-2]);
putchar('\n');
return(0);
}
/*
* Expand the shell escape by expanding unescaped !'s into the
* last issued command where possible.
*/
char lastbang[128];
bangexp(str)
char *str;
{
char bangbuf[BUFSIZ];
register char *cp, *cp2;
register int n;
int changed = 0;
cp = str;
cp2 = bangbuf;
n = BUFSIZ;
while (*cp) {
if (*cp == '!') {
if (n < strlen(lastbang)) {
overf:
printf("Command buffer overflow\n");
return(-1);
}
changed++;
strcpy(cp2, lastbang);
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);
fflush(stdout);
}
strcpy(str, bangbuf);
strncpy(lastbang, bangbuf, 128);
lastbang[127] = 0;
return(0);
}
/*
* Print out a nice help message from some file or another.
*/
help()
{
register c;
register FILE *f;
if ((f = fopen(HELPFILE, "r")) == NULL) {
perror(HELPFILE);
return(1);
}
while ((c = getc(f)) != EOF)
putchar(c);
fclose(f);
return(0);
}
/*
* Change user's working directory.
*/
schdir(str)
char *str;
{
register char *cp;
for (cp = str; *cp == ' '; cp++)
;
if (*cp == '\0')
cp = homedir;
else
if ((cp = expand(cp)) == NOSTR)
return(1);
if (chdir(cp) < 0) {
perror(cp);
return(1);
}
return(0);
}
respond(msgvec)
int *msgvec;
{
if (value("Replyall") == NOSTR)
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()
*/
_respond(msgvec)
int *msgvec;
{
struct message *mp;
char *cp, *cp2, *cp3, *rcv, *replyto;
char buf[2 * LINESIZE], **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];
dot = mp;
rcv = NOSTR;
cp = skin(nameof(mp, 1));
if (cp != NOSTR)
rcv = cp;
cp = skin(hfield("from", mp));
if (cp != NOSTR)
rcv = cp;
replyto = skin(hfield("reply-to", mp));
strcpy(buf, "");
if (replyto != NOSTR)
strcpy(buf, replyto);
else {
cp = skin(hfield("to", mp));
if (cp != NOSTR)
strcpy(buf, cp);
}
np = elide(extract(buf, GTO));
/* rcv = rename(rcv); */
mapf(np, rcv);
/*
* Delete my name from the reply list,
* and with it, all my alternate names.
*/
np = delname(np, myname, icequal);
if (altnames)
for (ap = altnames; *ap; ap++)
np = delname(np, *ap, icequal);
head.h_seq = 1;
cp = detract(np, 0);
if (cp != NOSTR && replyto == NOSTR) {
strcpy(buf, cp);
strcat(buf, " ");
strcat(buf, rcv);
}
else {
if (cp == NOSTR && replyto != NOSTR)
printf("Empty reply-to field -- replying to author\n");
if (cp == NOSTR)
strcpy(buf, rcv);
else
strcpy(buf, cp);
}
head.h_to = buf;
head.h_subject = hfield("subject", mp);
if (head.h_subject == NOSTR)
head.h_subject = hfield("subj", mp);
head.h_subject = reedit(head.h_subject);
head.h_cc = NOSTR;
if (replyto == NOSTR) {
cp = hfield("cc", mp);
if (cp != NOSTR) {
np = elide(extract(cp, GCC));
mapf(np, rcv);
np = delname(np, myname, icequal);
if (altnames != 0)
for (ap = altnames; *ap; ap++)
np = delname(np, *ap, icequal);
head.h_cc = detract(np, 0);
}
}
head.h_bcc = NOSTR;
mail1(&head);
return(0);
}
/*
* Modify the subject we are replying to to begin with Re: if
* it does not already.
*/
char *
reedit(subj)
char *subj;
{
char sbuf[10];
register char *newsubj;
if (subj == NOSTR)
return(NOSTR);
strncpy(sbuf, subj, 3);
sbuf[3] = 0;
if (icequal(sbuf, "re:"))
return(subj);
newsubj = salloc(strlen(subj) + 6);
sprintf(newsubj, "Re: %s", subj);
return(newsubj);
}
/*
* Preserve the named messages, so that they will be sent
* back to the system mailbox.
*/
preserve(msgvec)
int *msgvec;
{
register struct message *mp;
register int *ip, mesg;
if (edit) {
printf("Cannot \"preserve\" in edit mode\n");
return(1);
}
for (ip = msgvec; *ip != NULL; 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.
*/
unread(msgvec)
int msgvec[];
{
register int *ip;
for (ip = msgvec; *ip != NULL; ip++) {
dot = &message[*ip-1];
dot->m_flag &= ~(MREAD|MTOUCH);
dot->m_flag |= MSTATUS;
}
return(0);
}
/*
* Print the size of each message.
*/
messize(msgvec)
int *msgvec;
{
register struct message *mp;
register int *ip, mesg;
for (ip = msgvec; *ip != NULL; ip++) {
mesg = *ip;
mp = &message[mesg-1];
printf("%d: %d/%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.
*/
rexit(e)
{
if (sourcing)
return(1);
if (Tflag != NOSTR)
close(creat(Tflag, 0600));
exit(e);
}
/*
* Set or display a variable value. Syntax is similar to that
* of csh.
*/
set(arglist)
char **arglist;
{
register struct var *vp;
register char *cp, *cp2;
char varbuf[BUFSIZ], **ap, **p;
int errs, h, s;
if (argcount(arglist) == 0) {
for (h = 0, s = 1; h < HSHSIZE; h++)
for (vp = variables[h]; vp != NOVAR; vp = vp->v_link)
s++;
ap = (char **) salloc(s * sizeof *ap);
for (h = 0, p = ap; h < HSHSIZE; h++)
for (vp = variables[h]; vp != NOVAR; vp = vp->v_link)
*p++ = vp->v_name;
*p = NOSTR;
sort(ap);
for (p = ap; *p != NOSTR; p++)
printf("%s\t%s\n", *p, value(*p));
return(0);
}
errs = 0;
for (ap = arglist; *ap != NOSTR; ap++) {
cp = *ap;
cp2 = varbuf;
while (*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.
*/
unset(arglist)
char **arglist;
{
register struct var *vp, *vp2;
register char *cp;
int errs, h;
char **ap;
errs = 0;
for (ap = arglist; *ap != NOSTR; ap++) {
if ((vp2 = lookup(*ap)) == NOVAR) {
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);
cfree(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);
cfree(vp2);
}
return(errs);
}
/*
* Put add users to a group.
*/
group(argv)
char **argv;
{
register struct grouphead *gh;
register struct group *gp;
register int h;
int s;
char **ap, *gname, **p;
if (argcount(argv) == 0) {
for (h = 0, s = 1; h < HSHSIZE; h++)
for (gh = groups[h]; gh != NOGRP; gh = gh->g_link)
s++;
ap = (char **) salloc(s * sizeof *ap);
for (h = 0, p = ap; h < HSHSIZE; h++)
for (gh = groups[h]; gh != NOGRP; gh = gh->g_link)
*p++ = gh->g_name;
*p = NOSTR;
sort(ap);
for (p = ap; *p != NOSTR; p++)
printgroup(*p);
return(0);
}
if (argcount(argv) == 1) {
printgroup(*argv);
return(0);
}
gname = *argv;
h = hash(gname);
if ((gh = findgroup(gname)) == NOGRP) {
gh = (struct grouphead *) calloc(sizeof *gh, 1);
gh->g_name = vcopy(gname);
gh->g_list = NOGE;
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 != NOSTR; ap++) {
gp = (struct group *) 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.
*/
sort(list)
char **list;
{
register char **ap;
int diction();
for (ap = list; *ap != NOSTR; ap++)
;
if (ap-list < 2)
return;
qsort(list, ap-list, sizeof *list, diction);
}
/*
* Do a dictionary order comparison of the arguments from
* qsort.
*/
diction(a, b)
register char **a, **b;
{
return(strcmp(*a, *b));
}
/*
* The do nothing command for comments.
*/
null(e)
{
return(0);
}
/*
* Print out the current edit file, if we are editing.
* Otherwise, print the name of the person who's mail
* we are reading.
*/
file(argv)
char **argv;
{
register char *cp;
char fname[BUFSIZ];
int edit;
if (argv[0] == NOSTR) {
newfileinfo();
return(0);
}
/*
* Acker's! Must switch to the new file.
* We use a funny interpretation --
* # -- gets the previous file
* % -- gets the invoker's post office box
* %user -- gets someone else's post office box
* & -- gets invoker's mbox file
* string -- reads the given file
*/
cp = getfilename(argv[0], &edit);
if (cp == NOSTR)
return(-1);
if (setfile(cp, edit)) {
perror(cp);
return(-1);
}
announce(0);
}
/*
* Evaluate the string given as a new mailbox name.
* Ultimately, we want this to support a number of meta characters.
* Possibly:
* % -- for my system mail box
* %user -- for user's system mail box
* # -- for previous file
* & -- get's invoker's mbox file
* file name -- for any other file
*/
char prevfile[PATHSIZE];
char *
getfilename(name, aedit)
char *name;
int *aedit;
{
register char *cp;
char savename[BUFSIZ];
char oldmailname[BUFSIZ];
/*
* Assume we will be in "edit file" mode, until
* proven wrong.
*/
*aedit = 1;
switch (*name) {
case '%':
*aedit = 0;
strcpy(prevfile, mailname);
if (name[1] != 0) {
strcpy(savename, myname);
strcpy(oldmailname, mailname);
strncpy(myname, name+1, PATHSIZE-1);
myname[PATHSIZE-1] = 0;
findmail();
cp = savestr(mailname);
strcpy(myname, savename);
strcpy(mailname, oldmailname);
return(cp);
}
strcpy(oldmailname, mailname);
findmail();
cp = savestr(mailname);
strcpy(mailname, oldmailname);
return(cp);
case '#':
if (name[1] != 0)
goto regular;
if (prevfile[0] == 0) {
printf("No previous file\n");
return(NOSTR);
}
cp = savestr(prevfile);
strcpy(prevfile, mailname);
return(cp);
case '&':
strcpy(prevfile, mailname);
if (name[1] == 0)
return(mbox);
/* Fall into . . . */
default:
regular:
strcpy(prevfile, mailname);
cp = expand(name);
return(cp);
}
}
/*
* Expand file names like echo
*/
echo(argv)
char **argv;
{
register char **ap;
register char *cp;
for (ap = argv; *ap != NOSTR; ap++) {
cp = *ap;
if ((cp = expand(cp)) != NOSTR)
printf("%s ", cp);
}
return(0);
}
Respond(msgvec)
int *msgvec;
{
if (value("Replyall") == NOSTR)
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.
*/
_Respond(msgvec)
int msgvec[];
{
struct header head;
struct message *mp;
register int i, s, *ap;
register char *cp, *cp2, *subject;
for (s = 0, ap = msgvec; *ap != 0; ap++) {
mp = &message[*ap - 1];
dot = mp;
if ((cp = skin(hfield("from", mp))) != NOSTR)
s+= strlen(cp) + 1;
else
s += strlen(skin(nameof(mp, 2))) + 1;
}
if (s == 0)
return(0);
cp = salloc(s + 2);
head.h_to = cp;
for (ap = msgvec; *ap != 0; ap++) {
mp = &message[*ap - 1];
if ((cp2 = skin(hfield("from", mp))) == NOSTR)
cp2 = skin(nameof(mp, 2));
cp = copy(cp2, cp);
*cp++ = ' ';
}
*--cp = 0;
mp = &message[msgvec[0] - 1];
subject = hfield("subject", mp);
head.h_seq = 0;
if (subject == NOSTR)
subject = hfield("subj", mp);
head.h_subject = reedit(subject);
if (subject != NOSTR)
head.h_seq++;
head.h_cc = NOSTR;
head.h_bcc = NOSTR;
mail1(&head);
return(0);
}
/*
* Conditional commands. These allow one to parameterize one's
* .mailrc and do some things if sending, others if receiving.
*/
ifcmd(argv)
char **argv;
{
register 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.
*/
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.
*/
endifcmd()
{
if (cond == CANY) {
printf("\"Endif\" without matching \"if\"\n");
return(1);
}
cond = CANY;
return(0);
}
/*
* Set the list of alternate names.
*/
alternates(namelist)
char **namelist;
{
register int c;
register char **ap, **ap2, *cp;
c = argcount(namelist) + 1;
if (c == 1) {
if (altnames == 0)
return(0);
for (ap = altnames; *ap; ap++)
printf("%s ", *ap);
printf("\n");
return(0);
}
if (altnames != 0)
cfree((char *) altnames);
altnames = (char **) calloc(c, sizeof (char *));
for (ap = namelist, ap2 = altnames; *ap; ap++, ap2++) {
cp = (char *) calloc(strlen(*ap) + 1, sizeof (char));
strcpy(cp, *ap);
*ap2 = cp;
}
*ap2 = 0;
return(0);
}