408 lines
6.7 KiB
C
408 lines
6.7 KiB
C
/* $NetBSD: misc.c,v 1.22 2019/01/05 16:54:00 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 1.22 2019/01/05 16:54:00 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 = xmalloc((size_t)(n - s) * sizeof(*p));
|
|
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++)
|
|
free(* av);
|
|
free(av0);
|
|
}
|
|
|
|
Char **
|
|
saveblk(Char **v)
|
|
{
|
|
Char **newv, **onewv;
|
|
|
|
if (v == NULL)
|
|
return NULL;
|
|
|
|
newv = xcalloc((size_t)(blklen(v) + 1), sizeof(*newv));
|
|
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 = xmalloc((size_t)(((p - cp) + (q - dp) - 1) * sizeof(*ep)));
|
|
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 = xcalloc((size_t)(blklen(up) + blklen(vp) + 1), sizeof(*wp));
|
|
(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, size_t c)
|
|
{
|
|
Char **u;
|
|
|
|
for (u = v; *u && c-- > 0; u++)
|
|
free(*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 = xcalloc((size_t)(blklen(v) + 1), sizeof(*nv));
|
|
|
|
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);
|
|
}
|
|
}
|