2.11BSD/src/bin/tcsh/sh.misc.c
/* $Header: /home/hyperion/mu/christos/src/sys/tcsh-6.00/RCS/sh.misc.c,v 3.2 1991/07/05 02:23:28 christos Exp $ */
/*
* sh.misc.c: Miscelaneous 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.misc.c,v 3.2 1991/07/05 02:23:28 christos Exp $"; }
#endif
#include "sh.h"
static int renum __P((int, int));
/*
* C Shell
*/
int
any(s, c)
register char *s;
register int c;
{
if (!s)
return (0); /* Check for nil pointer */
while (*s)
if (*s++ == c)
return (1);
return (0);
}
void
setzero(cp, i)
char *cp;
int i;
{
if (i != 0)
do
*cp++ = 0;
while (--i);
}
char *
strsave(s)
register char *s;
{
char *n;
register char *p;
if (s == 0)
s = "";
for (p = s; *p++;);
n = p = (char *) xmalloc((size_t) ((p - s) * sizeof(char)));
while (*p++ = *s++);
return (n);
}
Char **
blkend(up)
register Char **up;
{
while (*up)
up++;
return (up);
}
void
blkpr(av)
register Char **av;
{
for (; *av; av++) {
xprintf("%s", short2str(*av));
if (av[1])
xprintf(" ");
}
}
int
blklen(av)
register Char **av;
{
register int i = 0;
while (*av++)
i++;
return (i);
}
Char **
blkcpy(oav, bv)
Char **oav;
register Char **bv;
{
register Char **av = oav;
while (*av++ = *bv++)
continue;
return (oav);
}
Char **
blkcat(up, vp)
Char **up, **vp;
{
(void) blkcpy(blkend(up), vp);
return (up);
}
void
blkfree(av0)
Char **av0;
{
register Char **av = av0;
if (!av0)
return;
for (; *av; av++)
xfree((ptr_t) * av);
xfree((ptr_t) av0);
}
Char **
saveblk(v)
register Char **v;
{
register Char **newv =
(Char **) xcalloc((size_t) (blklen(v) + 1), sizeof(Char **));
Char **onewv = newv;
while (*v)
*newv++ = Strsave(*v++);
return (onewv);
}
#ifndef POSIX
char *
strstr(s, t)
register const char *s, *t;
{
do {
register const char *ss = s;
register const char *tt = t;
do
if (*tt == '\0')
return ((char *) s);
while (*ss++ == *tt++);
} while (*s++ != '\0');
return (NULL);
}
#endif /* POSIX */
#ifndef SHORT_STRINGS
char *
strspl(cp, dp)
char *cp, *dp;
{
char *ep;
register char *p, *q;
if (!cp)
cp = "";
if (!dp)
dp = "";
for (p = cp; *p++;);
for (q = dp; *q++;);
ep = (char *) xmalloc((size_t) (((p - cp) + (q - dp) - 1) * sizeof(char)));
for (p = ep, q = cp; *p++ = *q++;);
for (p--, q = dp; *p++ = *q++;);
return (ep);
}
#endif
Char **
blkspl(up, vp)
register Char **up, **vp;
{
register Char **wp =
(Char **) xcalloc((size_t) (blklen(up) + blklen(vp) + 1),
sizeof(Char **));
(void) blkcpy(wp, up);
return (blkcat(wp, vp));
}
Char
lastchr(cp)
register Char *cp;
{
if (!cp)
return (0);
if (!*cp)
return (0);
while (cp[1])
cp++;
return (*cp);
}
/*
* This routine is called after an error to close up
* any units which may have been left open accidentally.
*/
void
closem()
{
register int f;
#ifdef YPBUGS
/* suggested by Justin Bur; thanks to Karl Kleinpaste */
fix_yp_bugs();
#endif
for (f = 0; f < NOFILE; f++)
if (f != SHIN && f != SHOUT && f != SHDIAG && f != OLDSTD &&
f != FSHTTY)
(void) close(f);
}
#ifndef FIOCLEX
/*
* Close files before executing a file.
* We could be MUCH more intelligent, since (on a version 7 system)
* we need only close files here during a source, the other
* shell fd's being in units 16-19 which are closed automatically!
*/
void
closech()
{
register int f;
if (didcch)
return;
didcch = 1;
SHIN = 0;
SHOUT = 1;
SHDIAG = 2;
OLDSTD = 0;
isoutatty = isatty(SHOUT);
isdiagatty = isatty(SHDIAG);
for (f = 3; f < NOFILE; f++)
(void) close(f);
}
#endif
void
donefds()
{
(void) close(0);
(void) close(1);
(void) close(2);
didfds = 0;
}
/*
* Move descriptor i to j.
* If j is -1 then we just want to get i to a safe place,
* i.e. to a unit > 2. This also happens in dcopy.
*/
int
dmove(i, j)
register int i, j;
{
if (i == j || i < 0)
return (i);
#ifdef DUP2
if (j >= 0) {
(void) dup2(i, j);
if (j != i)
(void) close(i);
return (j);
}
#endif
j = dcopy(i, j);
if (j != i)
(void) close(i);
return (j);
}
int
dcopy(i, j)
register int i, j;
{
if (i == j || i < 0 || j < 0 && i > 2)
return (i);
#ifdef DUP2
if (j >= 0) {
(void) dup2(i, j);
return (j);
}
#endif
(void) close(j);
return (renum(i, j));
}
static int
renum(i, j)
register int i, j;
{
register int k = dup(i);
if (k < 0)
return (-1);
if (j == -1 && k > 2)
return (k);
if (k != j) {
j = renum(k, j);
(void) close(k);
return (j);
}
return (k);
}
void
copy(to, from, size)
register char *to, *from;
register int size;
{
if (size && from && to)
do
*to++ = *from++;
while (--size != 0);
}
/*
* Left shift a command argument list, discarding
* the first c arguments. Used in "shift" commands
* as well as by commands like "repeat".
*/
void
lshift(v, c)
register Char **v;
register int c;
{
register Char **u = v;
while (*u && --c >= 0)
xfree((ptr_t) * u++);
(void) blkcpy(v, u);
}
int
number(cp)
Char *cp;
{
if (!cp)
return (0);
if (*cp == '-') {
cp++;
if (!Isdigit(*cp))
return (0);
cp++;
}
while (*cp && Isdigit(*cp))
cp++;
return (*cp == 0);
}
Char **
copyblk(v)
register Char **v;
{
register Char **nv =
(Char **) xcalloc((size_t) (blklen(v) + 1), sizeof(Char **));
return (blkcpy(nv, v));
}
#ifndef SHORT_STRINGS
char *
strend(cp)
register char *cp;
{
if (!cp)
return (cp);
while (*cp)
cp++;
return (cp);
}
#endif /* SHORT_STRINGS */
Char *
strip(cp)
Char *cp;
{
register Char *dp = cp;
if (!cp)
return (cp);
while (*dp++ &= TRIM)
continue;
return (cp);
}
void
udvar(name)
Char *name;
{
setname(short2str(name));
stderror(ERR_NAME | ERR_UNDVAR);
}
int
prefix(sub, str)
register Char *sub, *str;
{
for (;;) {
if (*sub == 0)
return (1);
if (*str == 0)
return (0);
if (*sub++ != *str++)
return (0);
}
}