NetBSD-5.0.2/bin/csh/misc.c
/* $NetBSD: misc.c,v 1.19 2006/03/18 06:24:26 christos Exp $ */
/*-
* Copyright (c) 1980, 1991, 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
* 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 <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)misc.c 8.1 (Berkeley) 5/31/93";
#else
__RCSID("$NetBSD: misc.c,v 1.19 2006/03/18 06:24:26 christos Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include "csh.h"
#include "extern.h"
static int renum(int, int);
int
any(const char *s, int c)
{
if (!s)
return (0); /* Check for nil pointer */
while (*s)
if (*s++ == c)
return (1);
return (0);
}
char *
strsave(const char *s)
{
const char *n;
char *p, *r;
if (s == NULL)
s = "";
for (n = s; *n++;)
continue;
r = p = (char *)xmalloc((size_t)((n - s) * sizeof(char)));
while ((*p++ = *s++) != '\0')
continue;
return (r);
}
Char **
blkend(Char **up)
{
while (*up)
up++;
return (up);
}
void
blkpr(FILE *fp, Char **av)
{
for (; *av; av++) {
(void)fprintf(fp, "%s", vis_str(*av));
if (av[1])
(void)fprintf(fp, " ");
}
}
int
blklen(Char **av)
{
int i;
i = 0;
while (*av++)
i++;
return (i);
}
Char **
blkcpy(Char **oav, Char **bv)
{
Char **av;
av = oav;
while ((*av++ = *bv++) != NULL)
continue;
return (oav);
}
Char **
blkcat(Char **up, Char **vp)
{
(void)blkcpy(blkend(up), vp);
return (up);
}
void
blkfree(Char **av0)
{
Char **av;
av = av0;
if (!av0)
return;
for (; *av; av++)
xfree((ptr_t) * av);
xfree((ptr_t) av0);
}
Char **
saveblk(Char **v)
{
Char **newv, **onewv;
if (v == NULL)
return NULL;
newv = (Char **)xcalloc((size_t)(blklen(v) + 1), sizeof(Char **));
onewv = newv;
while (*v)
*newv++ = Strsave(*v++);
return (onewv);
}
#ifdef NOTUSED
char *
strstr(char *s, char *t)
{
do {
char *ss;
char *tt;
ss = s;
tt = t;
do
if (*tt == '\0')
return (s);
while (*ss++ == *tt++);
} while (*s++ != '\0');
return (NULL);
}
#endif /* NOTUSED */
#ifndef SHORT_STRINGS
char *
strspl(char *cp, char *dp)
{
char *ep, *p, *q;
if (!cp)
cp = "";
if (!dp)
dp = "";
for (p = cp; *p++;)
continue;
for (q = dp; *q++;)
continue;
ep = (char *) xmalloc((size_t)(((p - cp) + (q - dp) - 1) * sizeof(char)));
for (p = ep, q = cp; *p++ = *q++;)
continue;
for (p--, q = dp; *p++ = *q++;)
continue;
return (ep);
}
#endif
Char **
blkspl(Char **up, Char **vp)
{
Char **wp;
wp = (Char **)xcalloc((size_t)(blklen(up) + blklen(vp) + 1),
sizeof(Char **));
(void)blkcpy(wp, up);
return (blkcat(wp, vp));
}
Char
lastchr(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(void)
{
int f;
int nofile;
#ifdef F_CLOSEM
nofile = FOLDSTD + 1;
if (fcntl(nofile, F_CLOSEM, 0) == -1)
#endif
nofile = NOFILE;
for (f = 0; f < nofile; f++)
if (f != SHIN && f != SHOUT && f != SHERR && f != OLDSTD &&
f != FSHTTY)
(void) close(f);
}
void
donefds(void)
{
(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(int i, int j)
{
if (i == j || i < 0)
return (i);
if (j >= 0) {
(void)dup2(i, j);
if (j != i)
(void)close(i);
return (j);
}
j = dcopy(i, j);
if (j != i)
(void)close(i);
return (j);
}
int
dcopy(int i, int j)
{
if (i == j || i < 0 || (j < 0 && i > 2))
return (i);
if (j >= 0) {
(void)dup2(i, j);
return (j);
}
return (renum(i, j));
}
static int
renum(int i, int j)
{
int k;
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);
}
/*
* Left shift a command argument list, discarding
* the first c arguments. Used in "shift" commands
* as well as by commands like "repeat".
*/
void
lshift(Char **v, int c)
{
Char **u;
for (u = v; *u && --c >= 0; u++)
xfree((ptr_t) *u);
(void)blkcpy(v, u);
}
int
number(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(Char **v)
{
Char **nv;
nv = (Char **)xcalloc((size_t)(blklen(v) + 1), sizeof(Char **));
return (blkcpy(nv, v));
}
#ifndef SHORT_STRINGS
char *
strend(char *cp)
{
if (!cp)
return (cp);
while (*cp)
cp++;
return (cp);
}
#endif /* SHORT_STRINGS */
Char *
strip(Char *cp)
{
Char *dp;
dp = cp;
if (!cp)
return (cp);
while ((*dp++ &= TRIM) != '\0')
continue;
return (cp);
}
Char *
quote(Char *cp)
{
Char *dp;
dp = cp;
if (!cp)
return (cp);
while (*dp != '\0')
*dp++ |= QUOTE;
return (cp);
}
void
udvar(Char *name)
{
setname(vis_str(name));
stderror(ERR_NAME | ERR_UNDVAR);
/* NOTREACHED */
}
int
prefix(Char *sub, Char *str)
{
for (;;) {
if (*sub == 0)
return (1);
if (*str == 0)
return (0);
if (*sub++ != *str++)
return (0);
}
}