2.11BSD/src/bin/tcsh/sh.func.c
/* $Header: /home/hyperion/mu/christos/src/sys/tcsh-6.00/RCS/sh.func.c,v 3.1 1991/07/05 19:07:02 christos Exp $ */
/*
* sh.func.c: csh builtin functions
*/
/*-
* Copyright (c) 1980, 1991 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.
*/
#include "config.h"
#if !defined(lint) && !defined(pdp11)
static char *rcsid()
{ return "$Id: sh.func.c,v 3.1 1991/07/05 19:07:02 christos Exp $"; }
#endif
#include "sh.h"
#include "ed.h"
#include "tw.h"
/*
* C shell
*/
extern int just_signaled;
extern char **environ;
extern bool MapsAreInited;
extern bool NLSMapsAreInited;
extern bool NoNLSRebind;
static int zlast = -1;
static void islogin __P((void));
static void reexecute __P((struct command *));
static void preread __P((void));
static void doagain __P((void));
static int getword __P((Char *));
static int keyword __P((Char *));
static void Unsetenv __P((Char *));
static void toend __P((void));
static void xecho __P((int, Char **));
struct biltins *
isbfunc(t)
struct command *t;
{
register Char *cp = t->t_dcom[0];
register struct biltins *bp, *bp1, *bp2;
static struct biltins label = {"", dozip, 0, 0};
static struct biltins foregnd = {"%job", dofg1, 0, 0};
static struct biltins backgnd = {"%job &", dobg1, 0, 0};
if (lastchr(cp) == ':') {
label.bname = short2str(cp);
return (&label);
}
if (*cp == '%') {
if (t->t_dflg & F_AMPERSAND) {
t->t_dflg &= ~F_AMPERSAND;
backgnd.bname = short2str(cp);
return (&backgnd);
}
foregnd.bname = short2str(cp);
return (&foregnd);
}
#ifdef WARP
/*
* This is a perhaps kludgy way to determine if the warp builtin is to be
* acknowledged or not. If checkwarp() fails, then we are to assume that
* the warp command is invalid, and carry on as we would handle any other
* non-builtin command. -- JDK 2/4/88
*/
if (eq(STRwarp, cp) && !checkwarp()) {
return (0); /* this builtin disabled */
}
#endif
/*
* Binary search Bp1 is the beginning of the current search range. Bp2 is
* one past the end.
*/
for (bp1 = bfunc, bp2 = bfunc + nbfunc; bp1 < bp2;) {
register i;
bp = bp1 + ((bp2 - bp1) >> 1);
if ((i = *cp - *bp->bname) == 0 &&
(i = Strcmp(cp, str2short(bp->bname))) == 0)
return bp;
if (i < 0)
bp2 = bp;
else
bp1 = bp + 1;
}
return (0);
}
void
func(t, bp)
register struct command *t;
register struct biltins *bp;
{
int i;
xechoit(t->t_dcom);
setname(bp->bname);
i = blklen(t->t_dcom) - 1;
if (i < bp->minargs)
stderror(ERR_NAME | ERR_TOOFEW);
if (i > bp->maxargs)
stderror(ERR_NAME | ERR_TOOMANY);
(*bp->bfunct) (t->t_dcom, t);
}
void
doonintr(v)
Char **v;
{
register Char *cp;
register Char *vv = v[1];
if (parintr == SIG_IGN)
return;
if (setintr && intty)
stderror(ERR_NAME | ERR_TERMINAL);
cp = gointr;
gointr = 0;
xfree((ptr_t) cp);
if (vv == 0) {
#ifdef BSDSIGS
if (setintr)
(void) sigblock(sigmask(SIGINT));
else
(void) signal(SIGINT, SIG_DFL);
#else
if (setintr)
(void) sighold(SIGINT);
else
(void) sigset(SIGINT, SIG_DFL);
#endif
gointr = 0;
}
else if (eq((vv = strip(vv)), STRminus)) {
#ifdef BSDSIGS
(void) signal(SIGINT, SIG_IGN);
#else
(void) sigset(SIGINT, SIG_IGN);
#endif
gointr = Strsave(STRminus);
}
else {
gointr = Strsave(vv);
#ifdef BSDSIGS
(void) signal(SIGINT, pintr);
#else
(void) sigset(SIGINT, pintr);
#endif
}
}
void
donohup()
{
if (intty)
stderror(ERR_NAME | ERR_TERMINAL);
if (setintr == 0) {
(void) signal(SIGHUP, SIG_IGN);
#ifdef CC
submit(getpid());
#endif
}
}
void
dozip()
{
;
}
void
prvars()
{
plist(&shvhed);
}
void
doalias(v)
register Char **v;
{
register struct varent *vp;
register Char *p;
v++;
p = *v++;
if (p == 0)
plist(&aliases);
else if (*v == 0) {
vp = adrof1(strip(p), &aliases);
if (vp)
blkpr(vp->vec), xprintf("\n");
}
else {
if (eq(p, STRalias) || eq(p, STRunalias)) {
setname(short2str(p));
stderror(ERR_NAME | ERR_DANGER);
}
set1(strip(p), saveblk(v), &aliases);
tw_clear_comm_list();
}
}
void
unalias(v)
Char **v;
{
unset1(v, &aliases);
tw_clear_comm_list();
}
void
dologout()
{
islogin();
goodbye();
}
void
dologin(v)
Char **v;
{
islogin();
rechist();
(void) signal(SIGTERM, parterm);
(void) execl(_PATH_LOGIN, "login", short2str(v[1]), NULL);
untty();
xexit(1);
}
#ifdef NEWGRP
void
donewgrp(v)
Char **v;
{
if (chkstop == 0 && setintr)
panystop(0);
(void) signal(SIGTERM, parterm);
(void) execl(_PATH_BIN_NEWGRP, "newgrp", short2str(v[1]), NULL);
(void) execl(_PATH_USRBIN_NEWGRP, "newgrp", short2str(v[1]), NULL);
untty();
xexit(1);
}
#endif
static void
islogin()
{
if (chkstop == 0 && setintr)
panystop(0);
if (loginsh)
return;
stderror(ERR_NOTLOGIN);
}
void
doif(v, kp)
Char **v;
struct command *kp;
{
register int i;
register Char **vv;
v++;
i = exp(&v);
vv = v;
if (*vv == NOSTR)
stderror(ERR_NAME | ERR_EMPTYIF);
if (eq(*vv, STRthen)) {
if (*++vv)
stderror(ERR_NAME | ERR_IMPRTHEN);
setname(short2str(STRthen));
/*
* If expression was zero, then scan to else, otherwise just fall into
* following code.
*/
if (!i)
search(T_IF, 0, NOSTR);
return;
}
/*
* Simple command attached to this if. Left shift the node in this tree,
* munging it so we can reexecute it.
*/
if (i) {
lshift(kp->t_dcom, vv - kp->t_dcom);
reexecute(kp);
donefds();
}
}
/*
* Reexecute a command, being careful not
* to redo i/o redirection, which is already set up.
*/
static void
reexecute(kp)
register struct command *kp;
{
kp->t_dflg &= F_SAVE;
kp->t_dflg |= F_REPEAT;
/*
* If tty is still ours to arbitrate, arbitrate it; otherwise dont even set
* pgrp's as the jobs would then have no way to get the tty (we can't give
* it to them, and our parent wouldn't know their pgrp, etc.
*/
execute(kp, (tpgrp > 0 ? tpgrp : -1), NULL, NULL);
}
void
doelse()
{
search(T_ELSE, 0, NOSTR);
}
void
dogoto(v)
Char **v;
{
register struct whyle *wp;
Char *lp;
/*
* While we still can, locate any unknown ends of existing loops. This
* obscure code is the WORST result of the fact that we don't really parse.
*/
zlast = T_GOTO;
for (wp = whyles; wp; wp = wp->w_next)
if (wp->w_end == 0) {
search(T_BREAK, 0, NOSTR);
wp->w_end = btell();
}
else
bseek(wp->w_end);
search(T_GOTO, 0, lp = globone(v[1], G_ERROR));
xfree((ptr_t) lp);
/*
* Eliminate loops which were exited.
*/
wfree();
}
void
doswitch(v)
register Char **v;
{
register Char *cp, *lp;
v++;
if (!*v || *(*v++) != '(')
stderror(ERR_SYNTAX);
cp = **v == ')' ? STRNULL : *v++;
if (*(*v++) != ')')
v--;
if (*v)
stderror(ERR_SYNTAX);
search(T_SWITCH, 0, lp = globone(cp, G_ERROR));
xfree((ptr_t) lp);
}
void
dobreak()
{
if (whyles)
toend();
else
stderror(ERR_NAME | ERR_NOTWHILE);
}
void
doexit(v)
Char **v;
{
if (chkstop == 0 && (intty || intact) && evalvec == 0)
panystop(0);
/*
* Don't DEMAND parentheses here either.
*/
v++;
if (*v) {
set(STRstatus, putn(exp(&v)));
if (*v)
stderror(ERR_NAME | ERR_EXPRESSION);
}
btoeof();
if (intty)
(void) close(SHIN);
}
void
doforeach(v)
register Char **v;
{
register Char *cp, *sp;
register struct whyle *nwp;
v++;
sp = cp = strip(*v);
if (!letter(*sp))
stderror(ERR_NAME | ERR_VARBEGIN);
while (*cp && alnum(*cp))
cp++;
if (*cp)
stderror(ERR_NAME | ERR_VARALNUM);
if ((cp - sp) > MAXVARLEN)
stderror(ERR_NAME | ERR_VARTOOLONG);
cp = *v++;
if (v[0][0] != '(' || v[blklen(v) - 1][0] != ')')
stderror(ERR_NAME | ERR_NOPAREN);
v++;
gflag = 0, tglob(v);
v = globall(v);
if (v == 0)
stderror(ERR_NAME | ERR_NOMATCH);
nwp = (struct whyle *) xcalloc(1, sizeof *nwp);
nwp->w_fe = nwp->w_fe0 = v;
gargv = 0;
nwp->w_start = btell();
nwp->w_fename = Strsave(cp);
nwp->w_next = whyles;
whyles = nwp;
/*
* Pre-read the loop so as to be more comprehensible to a terminal user.
*/
zlast = T_FOREACH;
if (intty)
preread();
doagain();
}
void
dowhile(v)
Char **v;
{
register int status;
register bool again = whyles != 0 && whyles->w_start == lineloc &&
whyles->w_fename == 0;
v++;
/*
* Implement prereading here also, taking care not to evaluate the
* expression before the loop has been read up from a terminal.
*/
if (intty && !again)
status = !exp0(&v, 1);
else
status = !exp(&v);
if (*v)
stderror(ERR_NAME | ERR_EXPRESSION);
if (!again) {
register struct whyle *nwp =
(struct whyle *) xcalloc(1, sizeof(*nwp));
nwp->w_start = lineloc;
nwp->w_end = 0;
nwp->w_next = whyles;
whyles = nwp;
zlast = T_WHILE;
if (intty) {
/*
* The tty preread
*/
preread();
doagain();
return;
}
}
if (status)
/* We ain't gonna loop no more, no more! */
toend();
}
static void
preread()
{
whyles->w_end = -1;
if (setintr)
#ifdef BSDSIGS
(void) sigsetmask(sigblock((sigmask_t) 0) & ~sigmask(SIGINT));
#else
(void) sigrelse(SIGINT);
#endif
search(T_BREAK, 0, NOSTR); /* read the expression in */
if (setintr)
#ifdef BSDSIGS
(void) sigblock(sigmask(SIGINT));
#else
(void) sighold(SIGINT);
#endif
whyles->w_end = btell();
}
void
doend()
{
if (!whyles)
stderror(ERR_NAME | ERR_NOTWHILE);
whyles->w_end = btell();
doagain();
}
void
docontin()
{
if (!whyles)
stderror(ERR_NAME | ERR_NOTWHILE);
doagain();
}
static void
doagain()
{
/* Repeating a while is simple */
if (whyles->w_fename == 0) {
bseek(whyles->w_start);
return;
}
/*
* The foreach variable list actually has a spurious word ")" at the end of
* the w_fe list. Thus we are at the of the list if one word beyond this
* is 0.
*/
if (!whyles->w_fe[1]) {
dobreak();
return;
}
set(whyles->w_fename, Strsave(*whyles->w_fe++));
bseek(whyles->w_start);
}
void
dorepeat(v, kp)
Char **v;
struct command *kp;
{
register int i;
#ifdef BSDSIGS
sigmask_t omask = 0;
#endif
i = getn(v[1]);
if (setintr)
#ifdef BSDSIGS
omask = sigblock(sigmask(SIGINT)) & ~sigmask(SIGINT);
#else
(void) sighold(SIGINT);
#endif
lshift(v, 2);
while (i > 0) {
if (setintr)
#ifdef BSDSIGS
(void) sigsetmask(omask);
#else
(void) sigrelse(SIGINT);
#endif
reexecute(kp);
--i;
}
donefds();
if (setintr)
#ifdef BSDSIGS
(void) sigsetmask(omask);
#else
(void) sigrelse(SIGINT);
#endif
}
void
doswbrk()
{
search(T_BRKSW, 0, NOSTR);
}
int
srchx(cp)
register Char *cp;
{
register struct srch *sp, *sp1, *sp2;
register i;
/*
* Binary search Sp1 is the beginning of the current search range. Sp2 is
* one past the end.
*/
for (sp1 = srchn, sp2 = srchn + nsrchn; sp1 < sp2;) {
sp = sp1 + ((sp2 - sp1) >> 1);
if ((i = *cp - *sp->s_name) == 0 &&
(i = Strcmp(cp, str2short(sp->s_name))) == 0)
return sp->s_value;
if (i < 0)
sp2 = sp;
else
sp1 = sp + 1;
}
return (-1);
}
static char *
isrchx(n)
register int n;
{
register struct srch *sp, *sp2;
for (sp = srchn, sp2 = srchn + nsrchn; sp < sp2; sp++)
if (sp->s_value == n)
return (sp->s_name);
return ("");
}
static Char Stype;
static Char *Sgoal;
/*VARARGS2*/
void
search(type, level, goal)
int type;
register int level;
Char *goal;
{
Char wordbuf[BUFSIZ];
register Char *aword = wordbuf;
register Char *cp;
Stype = type;
Sgoal = goal;
if (type == T_GOTO)
bseek((off_t) 0);
do {
if (intty && fseekp == feobp)
printprompt(1, str2short(isrchx(type == T_BREAK ?
zlast : type)));
/* xprintf("? "), flush(); */
aword[0] = 0;
(void) getword(aword);
switch (srchx(aword)) {
case T_ELSE:
if (level == 0 && type == T_IF)
return;
break;
case T_IF:
while (getword(aword))
continue;
if ((type == T_IF || type == T_ELSE) &&
eq(aword, STRthen))
level++;
break;
case T_ENDIF:
if (type == T_IF || type == T_ELSE)
level--;
break;
case T_FOREACH:
case T_WHILE:
if (type == T_BREAK)
level++;
break;
case T_END:
if (type == T_BREAK)
level--;
break;
case T_SWITCH:
if (type == T_SWITCH || type == T_BRKSW)
level++;
break;
case T_ENDSW:
if (type == T_SWITCH || type == T_BRKSW)
level--;
break;
case T_LABEL:
if (type == T_GOTO && getword(aword) && eq(aword, goal))
level = -1;
break;
default:
if (type != T_GOTO && (type != T_SWITCH || level != 0))
break;
if (lastchr(aword) != ':')
break;
aword[Strlen(aword) - 1] = 0;
if (type == T_GOTO && eq(aword, goal) ||
type == T_SWITCH && eq(aword, STRdefault))
level = -1;
break;
case T_CASE:
if (type != T_SWITCH || level != 0)
break;
(void) getword(aword);
if (lastchr(aword) == ':')
aword[Strlen(aword) - 1] = 0;
cp = strip(Dfix1(aword));
if (Gmatch(goal, cp))
level = -1;
xfree((ptr_t) cp);
break;
case T_DEFAULT:
if (type == T_SWITCH && level == 0)
level = -1;
break;
}
(void) getword(NOSTR);
} while (level >= 0);
}
static int
getword(wp)
register Char *wp;
{
register int found = 0;
register int c, d;
int kwd = 0;
Char *owp = wp;
c = readc(1);
d = 0;
do {
while (c == ' ' || c == '\t')
c = readc(1);
if (c == '#')
do
c = readc(1);
while (c >= 0 && c != '\n');
if (c < 0)
goto past;
if (c == '\n') {
if (wp)
break;
return (0);
}
unreadc(c);
found = 1;
do {
c = readc(1);
if (c == '\\' && (c = readc(1)) == '\n')
c = ' ';
if (c == '\'' || c == '"')
if (d == 0)
d = c;
else if (d == c)
d = 0;
if (c < 0)
goto past;
if (wp) {
*wp++ = c;
*wp = 0; /* end the string b4 test */
}
} while ((d || !(kwd = keyword(owp)) && c != ' '
&& c != '\t') && c != '\n');
} while (wp == 0);
/*
* if we have read a keyword ( "if", "switch" or "while" ) then we do not
* need to unreadc the look-ahead char
*/
if (!kwd) {
unreadc(c);
if (found)
*--wp = 0;
}
return (found);
past:
switch (Stype) {
case T_IF:
stderror(ERR_NAME | ERR_NOTFOUND, "then/endif");
case T_ELSE:
stderror(ERR_NAME | ERR_NOTFOUND, "endif");
case T_BRKSW:
case T_SWITCH:
stderror(ERR_NAME | ERR_NOTFOUND, "endsw");
case T_BREAK:
stderror(ERR_NAME | ERR_NOTFOUND, "end");
case T_GOTO:
setname(short2str(Sgoal));
stderror(ERR_NAME | ERR_NOTFOUND, "label");
}
/* NOTREACHED */
return (0);
}
/*
* keyword(wp) determines if wp is one of the built-n functions if,
* switch or while. It seems that when an if statement looks like
* "if(" then getword above sucks in the '(' and so the search routine
* never finds what it is scanning for. Rather than rewrite doword, I hack
* in a test to see if the string forms a keyword. Then doword stops
* and returns the word "if" -strike
*/
static int
keyword(wp)
Char *wp;
{
static Char STRif[] = {'i', 'f', '\0'};
static Char STRwhile[] = {'w', 'h', 'i', 'l', 'e', '\0'};
static Char STRswitch[] = {'s', 'w', 'i', 't', 'c', 'h', '\0'};
if (!wp)
return (0);
if ((Strcmp(wp, STRif) == 0) || (Strcmp(wp, STRwhile) == 0)
|| (Strcmp(wp, STRswitch) == 0))
return (1);
return (0);
}
static void
toend()
{
if (whyles->w_end == 0) {
search(T_BREAK, 0, NOSTR);
whyles->w_end = btell() - 1;
}
else
bseek(whyles->w_end);
wfree();
}
void
wfree()
{
long o = btell();
while (whyles) {
register struct whyle *wp = whyles;
register struct whyle *nwp = wp->w_next;
if (o >= wp->w_start && (wp->w_end == 0 || o < wp->w_end))
break;
if (wp->w_fe0)
blkfree(wp->w_fe0);
if (wp->w_fename)
xfree((ptr_t) wp->w_fename);
xfree((ptr_t) wp);
whyles = nwp;
}
}
void
doecho(v)
Char **v;
{
xecho(' ', v);
}
void
doglob(v)
Char **v;
{
xecho(0, v);
flush();
}
static void
xecho(sep, v)
Char sep;
register Char **v;
{
register Char *cp;
int nonl = 0;
if (setintr)
#ifdef BSDSIGS
(void) sigsetmask(sigblock((sigmask_t) 0) & ~sigmask(SIGINT));
#else
(void) sigrelse(SIGINT);
#endif
v++;
if (*v == 0)
return;
gflag = 0, tglob(v);
if (gflag) {
v = globall(v);
if (v == 0)
stderror(ERR_NAME | ERR_NOMATCH);
}
else {
v = gargv = saveblk(v);
trim(v);
}
if (sep == ' ' && *v && eq(*v, STRmn))
nonl++, v++;
while (cp = *v++) {
register int c;
while (c = *cp++) {
#if SVID > 0
#ifndef OREO
if (c == '\\') {
switch (c = *cp++) {
case 'b':
c = '\b';
break;
case 'c':
nonl = 1;
goto done;
case 'f':
c = '\f';
break;
case 'n':
c = '\n';
break;
case 'r':
c = '\r';
break;
case 't':
c = '\t';
break;
case 'v':
c = '\v';
break;
case '\\':
c = '\\';
break;
case '0':
c = 0;
if (*cp >= '0' && *cp < '8')
c = c * 8 + *cp++ - '0';
if (*cp >= '0' && *cp < '8')
c = c * 8 + *cp++ - '0';
if (*cp >= '0' && *cp < '8')
c = c * 8 + *cp++ - '0';
break;
case '\0':
c = *--cp;
break;
default:
xputchar('\\' | QUOTE);
break;
}
}
#endif /* OREO */
#endif /* SVID > 0 */
xputchar(c | QUOTE);
}
if (*v)
xputchar(sep | QUOTE);
}
#if SVID > 0
#ifndef OREO
done:
#endif /* OREO */
#endif /* SVID > 0 */
if (sep && nonl == 0)
xputchar('\n');
else
flush();
if (setintr)
#ifdef BSDSIGS
(void) sigblock(sigmask(SIGINT));
#else
(void) sighold(SIGINT);
#endif
if (gargv)
blkfree(gargv), gargv = 0;
}
/* from "Karl Berry." <karl%mote.umb.edu@relay.cs.net> -- for NeXT things
(and anything else with a modern comp_r) */
void
dosetenv(v)
register Char **v;
{
Char *vp, *lp;
v++;
if ((vp = *v++) == 0) {
register Char **ep;
if (setintr)
#ifdef BSDSIGS
(void) sigsetmask(sigblock((sigmask_t) 0) & ~sigmask(SIGINT));
#else
(void) sigrelse(SIGINT);
#endif
for (ep = STR_environ; *ep; ep++)
xprintf("%s\n", short2str(*ep));
return;
}
if ((lp = *v++) == 0)
lp = STRNULL;
Setenv(vp, lp = globone(lp, G_ERROR));
if (eq(vp, STRPATH)) {
importpath(lp);
dohash();
}
#ifdef apollo
else if (eq(vp, STRSYSTYPE))
dohash();
#endif /* apollo */
else if (eq(vp, STRLANG) || eq(vp, STRLC_CTYPE)) {
#ifdef NLS
int k;
(void) setlocale(LC_ALL, "");
for (k = 0200; k <= 0377 && !Isprint(k); k++);
AsciiOnly = k > 0377;
#else
AsciiOnly = 0;
#endif /* NLS */
NLSMapsAreInited = 0;
ed_I();
if (MapsAreInited && !NLSMapsAreInited)
(void) ed_INLSMaps();
}
else if (eq(vp, STRNOREBIND)) {
NoNLSRebind = 1;
}
#ifdef SIG_WINDOW
else if ((eq(lp, STRNULL) &&
(eq(vp, STRLINES) || eq(vp, STRCOLUMNS))) ||
eq(vp, STRTRMCAP)) {
check_window_size(1);
}
#endif /* SIG_WINDOW */
xfree((ptr_t) lp);
}
void
dounsetenv(v)
register Char **v;
{
Char **ep, *p, *n;
int i, maxi;
static Char *name = NULL;
if (name)
xfree((ptr_t) name);
/*
* Find the longest environment variable
*/
for (maxi = 0, ep = STR_environ; *ep; ep++) {
for (i = 0, p = *ep; *p && *p != '='; p++, i++);
if (i > maxi)
maxi = i;
}
name = (Char *) xmalloc((size_t) (maxi + 1) * sizeof(Char));
while (++v && *v)
for (maxi = 1; maxi;)
for (maxi = 0, ep = STR_environ; *ep; ep++) {
for (n = name, p = *ep; *p && *p != '='; *n++ = *p++);
*n = '\0';
if (!Gmatch(name, *v))
continue;
maxi = 1;
if (eq(name, STRNOREBIND))
NoNLSRebind = 0;
#ifdef apollo
else if (eq(name, STRSYSTYPE))
dohash();
#endif /* apollo */
else if (eq(name, STRLANG) || eq(name, STRLC_CTYPE)) {
#ifdef NLS
int k;
(void) setlocale(LC_ALL, "");
for (k = 0200; k <= 0377 && !Isprint(k); k++);
AsciiOnly = k > 0377;
#else
AsciiOnly = getenv("LANG") == NULL &&
getenv("LC_CTYPE") == NULL;
#endif /* NLS */
NLSMapsAreInited = 0;
ed_I();
if (MapsAreInited && !NLSMapsAreInited)
(void) ed_INLSMaps();
}
/*
* Delete name, and start again cause the environment changes
*/
Unsetenv(name);
break;
}
xfree((ptr_t) name), name = NULL;
}
void
Setenv(name, val)
Char *name, *val;
{
#ifdef SETENV_IN_LIB
#undef setenv
char nameBuf[BUFSIZ];
char *cname = short2str(name);
if (cname == NULL)
return;
(void) strcpy(nameBuf, cname);
setenv(nameBuf, short2str(val), 1);
#else
register Char **ep = STR_environ;
register Char *cp, *dp;
Char *blk[2];
Char **oep = ep;
for (; *ep; ep++) {
for (cp = name, dp = *ep; *cp && *cp == *dp; cp++, dp++)
continue;
if (*cp != 0 || *dp != '=')
continue;
cp = Strspl(STRequal, val);
xfree((ptr_t) * ep);
*ep = strip(Strspl(name, cp));
xfree((ptr_t) cp);
blkfree((Char **) environ);
environ = short2blk(STR_environ);
return;
}
cp = Strspl(name, STRequal);
blk[0] = strip(Strspl(cp, val));
xfree((ptr_t) cp);
blk[1] = 0;
STR_environ = blkspl(STR_environ, blk);
blkfree((Char **) environ);
environ = short2blk(STR_environ);
xfree((ptr_t) oep);
#endif /* SETENV_IN_LIB */
}
static void
Unsetenv(name)
Char *name;
{
register Char **ep = STR_environ;
register Char *cp, *dp;
Char **oep = ep;
for (; *ep; ep++) {
for (cp = name, dp = *ep; *cp && *cp == *dp; cp++, dp++)
continue;
if (*cp != 0 || *dp != '=')
continue;
cp = *ep;
*ep = 0;
STR_environ = blkspl(STR_environ, ep + 1);
environ = short2blk(STR_environ);
*ep = cp;
xfree((ptr_t) cp);
xfree((ptr_t) oep);
return;
}
}
void
doumask(v)
register Char **v;
{
register Char *cp = v[1];
register int i;
if (cp == 0) {
i = umask(0);
(void) umask(i);
xprintf("%o\n", i);
return;
}
i = 0;
while (Isdigit(*cp) && *cp != '8' && *cp != '9')
i = i * 8 + *cp++ - '0';
if (*cp || i < 0 || i > 0777)
stderror(ERR_NAME | ERR_MASK);
(void) umask(i);
}
#ifndef BSDTIMES
typedef long RLIM_TYPE;
#ifndef RLIM_INFINITY
extern RLIM_TYPE ulimit();
#define RLIM_INFINITY 0x003fffff
#define RLIMIT_FSIZE 1
#endif /* RLIM_INFINITY */
#ifdef aiws
#define toset(a) (((a) == 3) ? 1004 : (a) + 1)
#define RLIMIT_STACK 1005
#else /* aiws */
#define toset(a) ((a) + 1)
#endif /* aiws */
#else /* BSDTIMES */
typedef int RLIM_TYPE;
#endif /* BSDTIMES */
static struct limits {
int limconst;
char *limname;
int limdiv;
char *limscale;
} limits[] = {
#ifdef RLIMIT_CPU
RLIMIT_CPU, "cputime", 1, "seconds",
#endif /* RLIMIT_CPU */
#ifdef RLIMIT_FSIZE
RLIMIT_FSIZE, "filesize", 1024, "kbytes",
#endif /* RLIMIT_FSIZE */
#ifdef RLIMIT_DATA
RLIMIT_DATA, "datasize", 1024, "kbytes",
#endif /* RLIMIT_DATA */
#ifdef RLIMIT_STACK
RLIMIT_STACK, "stacksize", 1024, "kbytes",
#endif /* RLIMIT_STACK */
#ifdef RLIMIT_CORE
RLIMIT_CORE, "coredumpsize", 1024, "kbytes",
#endif /* RLIMIT_CORE */
#ifdef RLIMIT_RSS
RLIMIT_RSS, "memoryuse", 1024, "kbytes",
#endif /* RLIMIT_RSS */
#ifdef RLIMIT_NOFILE
RLIMIT_NOFILE, "descriptors", 1, "",
#endif
#ifdef RLIMIT_CONCUR
RLIMIT_CONCUR, "concurrency", 1, "thread(s)",
#endif
#ifdef RLIMIT_MEMLOCK
RLIMIT_MEMLOCK, "memorylocked", 1024, "kbytes",
#endif
#ifdef RLIMIT_NPROC
RLIMIT_NPROC, "maxproc", 1, "",
#endif
#ifdef RLIMIT_OFILE
RLIMIT_OFILE, "openfiles", 1, "",
#endif
-1, NULL, 0, NULL
};
static struct limits *findlim();
static RLIM_TYPE getval();
static void limtail();
static void plim();
static int setlim();
#if defined(convex) || defined(__convex__)
static RLIM_TYPE
restrict_limit(value)
double value;
{
/*
* is f too large to cope with? return the maximum or minimum int
*/
if (value > (double) INT_MAX)
return (INT_MAX);
else if (value < (double) INT_MIN)
return (INT_MIN);
else
return ((int) value);
}
#endif /* convex */
static struct limits *
findlim(cp)
Char *cp;
{
register struct limits *lp, *res;
res = (struct limits *) NULL;
for (lp = limits; lp->limconst >= 0; lp++)
if (prefix(cp, str2short(lp->limname))) {
if (res)
stderror(ERR_NAME | ERR_AMBIG);
res = lp;
}
if (res)
return (res);
stderror(ERR_NAME | ERR_LIMIT);
/* NOTREACHED */
return (0);
}
void
dolimit(v)
register Char **v;
{
register struct limits *lp;
register RLIM_TYPE limit;
char hard = 0;
v++;
if (*v && eq(*v, STRmh)) {
hard = 1;
v++;
}
if (*v == 0) {
for (lp = limits; lp->limconst >= 0; lp++)
plim(lp, hard);
return;
}
lp = findlim(v[0]);
if (v[1] == 0) {
plim(lp, hard);
return;
}
limit = getval(lp, v + 1);
if (setlim(lp, hard, limit) < 0)
stderror(ERR_SILENT);
}
static RLIM_TYPE
getval(lp, v)
register struct limits *lp;
Char **v;
{
#if defined(convex) || defined(__convex__)
RLIM_TYPE restrict_limit();
#endif /* convex */
register float f;
double atof();
Char *cp = *v++;
f = atof(short2str(cp));
#if defined(convex)||defined(__convex__)
/*
* is f too large to cope with. limit f to minint, maxint - X-6768 by
* strike
*/
if ((f < (double) INT_MIN) || (f > (double) INT_MAX)) {
stderror(ERR_NAME | ERR_TOOLARGE);
}
#endif /* convex */
while (Isdigit(*cp) || *cp == '.' || *cp == 'e' || *cp == 'E')
cp++;
if (*cp == 0) {
if (*v == 0)
#if defined(convex) || defined(__convex__)
return ((RLIM_TYPE) restrict_limit((f + 0.5) * lp->limdiv));
#else /* convex */
return ((RLIM_TYPE) ((f + 0.5) * lp->limdiv));
#endif /* convex */
cp = *v;
}
switch (*cp) {
#ifdef RLIMIT_CPU
case ':':
if (lp->limconst != RLIMIT_CPU)
goto badscal;
#if defined(convex) || defined(__convex__)
return ((RLIM_TYPE)
restrict_limit((f * 60.0 + atof(short2str(cp + 1)))));
#else /* convex */
return ((RLIM_TYPE) (f * 60.0 + atof(short2str(cp + 1))));
#endif /* convex */
case 'h':
if (lp->limconst != RLIMIT_CPU)
goto badscal;
limtail(cp, "hours");
f *= 3600.0;
break;
case 'm':
if (lp->limconst == RLIMIT_CPU) {
limtail(cp, "minutes");
f *= 60.0;
break;
}
*cp = 'm';
limtail(cp, "megabytes");
f *= 1024.0 * 1024.0;
break;
case 's':
if (lp->limconst != RLIMIT_CPU)
goto badscal;
limtail(cp, "seconds");
break;
#endif /* RLIMIT_CPU */
case 'M':
#ifdef RLIMIT_CPU
if (lp->limconst == RLIMIT_CPU)
goto badscal;
#endif /* RLIMIT_CPU */
*cp = 'm';
limtail(cp, "megabytes");
f *= 1024.0 * 1024.0;
break;
case 'k':
#ifdef RLIMIT_CPU
if (lp->limconst == RLIMIT_CPU)
goto badscal;
#endif /* RLIMIT_CPU */
limtail(cp, "kbytes");
f *= 1024.0;
break;
case 'u':
limtail(cp, "unlimited");
return (RLIM_INFINITY);
default:
#ifdef RLIMIT_CPU
badscal:
#endif /* RLIMIT_CPU */
stderror(ERR_NAME | ERR_SCALEF);
}
#if defined(convex) || defined(__convex__)
return ((RLIM_TYPE) restrict_limit((f + 0.5)));
#else
return ((RLIM_TYPE) (f + 0.5));
#endif
}
static void
limtail(cp, str)
Char *cp;
char *str;
{
while (*cp && *cp == *str)
cp++, str++;
if (*cp)
stderror(ERR_BADSCALE, str);
}
/*ARGSUSED*/
static void
plim(lp, hard)
register struct limits *lp;
Char hard;
{
#ifdef BSDTIMES
struct rlimit rlim;
#endif /* BSDTIMES */
RLIM_TYPE limit;
xprintf("%s \t", lp->limname);
#ifndef BSDTIMES
limit = ulimit(lp->limconst, 0);
#else /* BSDTIMES */
(void) getrlimit(lp->limconst, &rlim);
limit = hard ? rlim.rlim_max : rlim.rlim_cur;
#endif /* BSDTIMES */
if (limit == RLIM_INFINITY)
xprintf("unlimited");
#ifdef RLIMIT_CPU
else if (lp->limconst == RLIMIT_CPU)
psecs((long) limit);
#endif /* RLIMIT_CPU */
else
#ifndef BSDTIMES
if (lp->limconst == RLIMIT_FSIZE)
/*
* Christos: filesize comes in 512 blocks. we divide by 2 to get 1024
* blocks. Note we cannot pre-multiply cause we might overflow (A/UX)
*/
xprintf("%ld %s", (long) (limit / 2), lp->limscale);
else
#endif /* BSDTIMES */
xprintf("%ld %s", (long) (limit / lp->limdiv), lp->limscale);
xprintf("\n");
}
void
dounlimit(v)
register Char **v;
{
register struct limits *lp;
int lerr = 0;
Char hard = 0;
v++;
if (*v && eq(*v, STRmh)) {
hard = 1;
v++;
}
if (*v == 0) {
for (lp = limits; lp->limconst >= 0; lp++)
if (setlim(lp, hard, (RLIM_TYPE) RLIM_INFINITY) < 0)
lerr++;
if (lerr)
stderror(ERR_SILENT);
return;
}
while (*v) {
lp = findlim(*v++);
if (setlim(lp, hard, (RLIM_TYPE) RLIM_INFINITY) < 0)
stderror(ERR_SILENT);
}
}
static int
setlim(lp, hard, limit)
register struct limits *lp;
Char hard;
RLIM_TYPE limit;
{
#ifdef BSDTIMES
struct rlimit rlim;
(void) getrlimit(lp->limconst, &rlim);
if (hard)
rlim.rlim_max = limit;
else if (limit == RLIM_INFINITY && geteuid() != 0)
rlim.rlim_cur = rlim.rlim_max;
else
rlim.rlim_cur = limit;
if (setrlimit(lp->limconst, &rlim) < 0) {
#else /* BSDTIMES */
if (limit != RLIM_INFINITY && lp->limconst == RLIMIT_FSIZE)
limit /= 512;
if (ulimit(toset(lp->limconst), limit) < 0) {
#endif /* BSDTIMES */
xprintf("%s: %s: Can't %s%s limit\n", bname, lp->limname,
limit == RLIM_INFINITY ? "remove" : "set",
hard ? " hard" : "");
return (-1);
}
return (0);
}
void
dosuspend()
{
int ctpgrp;
sigmask_t omask;
sigret_t(*old) ();
if (loginsh)
stderror(ERR_SUSPLOG);
untty();
#ifdef BSDJOBS
old = signal(SIGTSTP, SIG_DFL);
#ifndef pdp11
(void) kill(0, SIGTSTP);
#else
(void) kill(0, SIGSTOP); /* jpn: TSTP doesn't do anything. why? */
#endif
/* the shell stops here */
(void) signal(SIGTSTP, old);
#else
stderror(ERR_JOBCONTROL);
#endif /* BSDJOBS */
#ifdef BSDJOBS
if (tpgrp != -1) {
retry:
ctpgrp = tcgetpgrp(FSHTTY);
if (ctpgrp != opgrp) {
old = signal(SIGTTIN, SIG_DFL);
(void) kill(0, SIGTTIN);
(void) signal(SIGTTIN, old);
goto retry;
}
(void) setpgid(0, shpgrp);
(void) tcsetpgrp(FSHTTY, shpgrp);
}
#endif /* BSDJOBS */
(void) setdisc(FSHTTY);
}
/* This is the dreaded EVAL built-in.
* If you don't fiddle with file descriptors, and reset didfds,
* this command will either ignore redirection inside or outside
* its aguments, e.g. eval "date >x" vs. eval "date" >x
* The stuff here seems to work, but I did it by trial and error rather
* than really knowing what was going on. If tpgrp is zero, we are
* probably a background eval, e.g. "eval date &", and we want to
* make sure that any processes we start stay in our pgrp.
* This is also the case for "time eval date" -- stay in same pgrp.
* Otherwise, under stty tostop, processes will stop in the wrong
* pgrp, with no way for the shell to get them going again. -IAN!
*/
static Char **gv = NULL;
void
doeval(v)
Char **v;
{
Char **oevalvec;
Char *oevalp;
int odidfds;
#ifndef FIOCLEX
int odidcch;
#endif /* FIOCLEX */
jmp_buf osetexit;
int my_reenter;
Char **savegv;
int saveIN;
int saveOUT;
int saveDIAG;
int oSHIN;
int oSHOUT;
int oSHDIAG;
oevalvec = evalvec;
oevalp = evalp;
odidfds = didfds;
#ifndef FIOCLEX
odidcch = didcch;
#endif /* FIOCLEX */
oSHIN = SHIN;
oSHOUT = SHOUT;
oSHDIAG = SHDIAG;
savegv = gv;
v++;
if (*v == 0)
return;
gflag = 0, tglob(v);
if (gflag) {
gv = v = globall(v);
gargv = 0;
if (v == 0)
stderror(ERR_NOMATCH);
v = copyblk(v);
}
else {
gv = NULL;
v = copyblk(v);
trim(v);
}
saveIN = dcopy(SHIN, -1);
saveOUT = dcopy(SHOUT, -1);
saveDIAG = dcopy(SHDIAG, -1);
getexit(osetexit);
/* PWP: setjmp/longjmp bugfix for optimizing comp_rs */
if ((my_reenter = setexit()) == 0) {
evalvec = v;
evalp = 0;
SHIN = dcopy(0, -1);
SHOUT = dcopy(1, -1);
SHDIAG = dcopy(2, -1);
#ifndef FIOCLEX
didcch = 0;
#endif /* FIOCLEX */
didfds = 0;
process(0);
}
evalvec = oevalvec;
evalp = oevalp;
doneinp = 0;
#ifndef FIOCLEX
didcch = odidcch;
#endif /* FIOCLEX */
didfds = odidfds;
(void) close(SHIN);
(void) close(SHOUT);
(void) close(SHDIAG);
SHIN = dmove(saveIN, oSHIN);
SHOUT = dmove(saveOUT, oSHOUT);
SHDIAG = dmove(saveDIAG, oSHDIAG);
if (gv)
blkfree(gv);
gv = savegv;
resexit(osetexit);
if (my_reenter)
stderror(ERR_SILENT);
}