406 lines
6.9 KiB
C
406 lines
6.9 KiB
C
/* $NetBSD: misc.c,v 1.12 2001/09/14 14:04:00 wiz Exp $ */
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/*-
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* Copyright (c) 1980, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)misc.c 8.1 (Berkeley) 5/31/93";
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#else
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__RCSID("$NetBSD: misc.c,v 1.12 2001/09/14 14:04:00 wiz Exp $");
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#endif
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#endif /* not lint */
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#include <sys/param.h>
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#include <stdlib.h>
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#include <unistd.h>
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#if __STDC__
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# include <stdarg.h>
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#else
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# include <varargs.h>
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#endif
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#include "csh.h"
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#include "extern.h"
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static int renum(int, int);
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int
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any(char *s, int c)
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{
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if (!s)
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return (0); /* Check for nil pointer */
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while (*s)
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if (*s++ == c)
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return (1);
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return (0);
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}
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char *
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strsave(char *s)
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{
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char *n, *p;
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if (s == NULL)
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s = "";
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for (p = s; *p++;)
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continue;
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n = p = (char *)xmalloc((size_t)((p - s) * sizeof(char)));
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while ((*p++ = *s++) != '\0')
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continue;
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return (n);
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}
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Char **
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blkend(Char **up)
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{
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while (*up)
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up++;
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return (up);
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}
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void
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blkpr(FILE *fp, Char **av)
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{
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for (; *av; av++) {
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(void)fprintf(fp, "%s", vis_str(*av));
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if (av[1])
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(void)fprintf(fp, " ");
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}
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}
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int
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blklen(Char **av)
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{
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int i;
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i = 0;
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while (*av++)
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i++;
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return (i);
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}
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Char **
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blkcpy(Char **oav, Char **bv)
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{
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Char **av;
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av = oav;
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while ((*av++ = *bv++) != NULL)
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continue;
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return (oav);
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}
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Char **
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blkcat(Char **up, Char **vp)
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{
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(void)blkcpy(blkend(up), vp);
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return (up);
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}
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void
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blkfree(Char **av0)
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{
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Char **av;
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av = av0;
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if (!av0)
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return;
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for (; *av; av++)
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xfree((ptr_t) * av);
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xfree((ptr_t) av0);
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}
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Char **
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saveblk(Char **v)
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{
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Char **newv, **onewv;
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newv = (Char **)xcalloc((size_t)(blklen(v) + 1), sizeof(Char **));
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onewv = newv;
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while (*v)
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*newv++ = Strsave(*v++);
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return (onewv);
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}
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#ifdef NOTUSED
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char *
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strstr(char *s, char *t)
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{
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do {
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char *ss;
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char *tt;
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ss = s;
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tt = t;
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do
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if (*tt == '\0')
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return (s);
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while (*ss++ == *tt++);
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} while (*s++ != '\0');
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return (NULL);
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}
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#endif /* NOTUSED */
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#ifndef SHORT_STRINGS
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char *
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strspl(char *cp, char *dp)
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{
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char *ep, *p, *q;
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if (!cp)
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cp = "";
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if (!dp)
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dp = "";
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for (p = cp; *p++;)
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continue;
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for (q = dp; *q++;)
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continue;
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ep = (char *) xmalloc((size_t)(((p - cp) + (q - dp) - 1) * sizeof(char)));
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for (p = ep, q = cp; *p++ = *q++;)
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continue;
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for (p--, q = dp; *p++ = *q++;)
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continue;
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return (ep);
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}
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#endif
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Char **
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blkspl(Char **up, Char **vp)
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{
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Char **wp;
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wp = (Char **)xcalloc((size_t)(blklen(up) + blklen(vp) + 1),
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sizeof(Char **));
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(void)blkcpy(wp, up);
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return (blkcat(wp, vp));
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}
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Char
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lastchr(Char *cp)
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{
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if (!cp)
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return (0);
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if (!*cp)
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return (0);
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while (cp[1])
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cp++;
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return (*cp);
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}
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/*
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* This routine is called after an error to close up
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* any units which may have been left open accidentally.
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*/
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void
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closem(void)
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{
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int f;
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for (f = 0; f < NOFILE; f++)
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if (f != SHIN && f != SHOUT && f != SHERR && f != OLDSTD &&
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f != FSHTTY)
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(void) close(f);
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}
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void
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donefds(void)
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{
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(void)close(0);
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(void)close(1);
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(void)close(2);
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didfds = 0;
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}
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/*
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* Move descriptor i to j.
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* If j is -1 then we just want to get i to a safe place,
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* i.e. to a unit > 2. This also happens in dcopy.
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*/
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int
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dmove(int i, int j)
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{
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if (i == j || i < 0)
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return (i);
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if (j >= 0) {
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(void)dup2(i, j);
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if (j != i)
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(void)close(i);
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return (j);
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}
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j = dcopy(i, j);
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if (j != i)
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(void)close(i);
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return (j);
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}
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int
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dcopy(int i, int j)
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{
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if (i == j || i < 0 || (j < 0 && i > 2))
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return (i);
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if (j >= 0) {
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(void)dup2(i, j);
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return (j);
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}
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(void)close(j);
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return (renum(i, j));
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}
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static int
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renum(int i, int j)
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{
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int k;
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k = dup(i);
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if (k < 0)
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return (-1);
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if (j == -1 && k > 2)
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return (k);
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if (k != j) {
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j = renum(k, j);
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(void)close(k);
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return (j);
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}
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return (k);
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}
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/*
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* Left shift a command argument list, discarding
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* the first c arguments. Used in "shift" commands
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* as well as by commands like "repeat".
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*/
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void
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lshift(Char **v, int c)
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{
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Char **u;
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for (u = v; *u && --c >= 0; u++)
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xfree((ptr_t) *u);
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(void)blkcpy(v, u);
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}
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int
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number(Char *cp)
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{
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if (!cp)
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return(0);
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if (*cp == '-') {
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cp++;
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if (!Isdigit(*cp))
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return (0);
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cp++;
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}
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while (*cp && Isdigit(*cp))
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cp++;
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return (*cp == 0);
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}
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Char **
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copyblk(Char **v)
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{
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Char **nv;
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nv = (Char **)xcalloc((size_t)(blklen(v) + 1), sizeof(Char **));
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return (blkcpy(nv, v));
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}
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#ifndef SHORT_STRINGS
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char *
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strend(char *cp)
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{
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if (!cp)
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return (cp);
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while (*cp)
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cp++;
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return (cp);
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}
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#endif /* SHORT_STRINGS */
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Char *
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strip(Char *cp)
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{
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Char *dp;
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dp = cp;
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if (!cp)
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return (cp);
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while ((*dp++ &= TRIM) != '\0')
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continue;
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return (cp);
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}
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Char *
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quote(Char *cp)
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{
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Char *dp;
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dp = cp;
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if (!cp)
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return (cp);
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while (*dp != '\0')
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*dp++ |= QUOTE;
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return (cp);
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}
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void
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udvar(Char *name)
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{
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setname(vis_str(name));
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stderror(ERR_NAME | ERR_UNDVAR);
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/* NOTREACHED */
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}
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int
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prefix(Char *sub, Char *str)
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{
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for (;;) {
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if (*sub == 0)
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return (1);
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if (*str == 0)
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return (0);
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if (*sub++ != *str++)
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return (0);
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}
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}
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