426 lines
7.0 KiB
C
426 lines
7.0 KiB
C
/*-
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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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#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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static const char rcsid[] =
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"$Id: misc.c,v 1.5 1997/02/22 14:02:02 peter 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 __P((int, int));
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int
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any(s, c)
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char *s;
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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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void
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setzero(cp, i)
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char *cp;
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int i;
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{
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if (i != 0)
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do
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*cp++ = 0;
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while (--i);
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}
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char *
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strsave(s)
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char *s;
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{
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char *n;
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char *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(up)
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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(fp, av)
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FILE *fp;
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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(av)
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Char **av;
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{
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int 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(oav, bv)
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Char **oav;
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Char **bv;
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{
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Char **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(up, vp)
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Char **up, **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(av0)
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Char **av0;
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{
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Char **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(v)
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Char **v;
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{
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Char **newv =
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(Char **) xcalloc((size_t) (blklen(v) + 1), sizeof(Char **));
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Char **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(s, t)
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char *s, *t;
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{
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do {
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char *ss = s;
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char *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(cp, dp)
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char *cp, *dp;
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{
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char *ep;
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char *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(up, vp)
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Char **up, **vp;
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{
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Char **wp =
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(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(cp)
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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()
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{
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int f, flimit;
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for (f = 0, flimit = getdtablesize(); f < flimit; 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()
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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(i, j)
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int i, 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(i, j)
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int i, 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(i, j)
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int i, j;
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{
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int 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(v, c)
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Char **v;
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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(cp)
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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(v)
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Char **v;
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{
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Char **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(cp)
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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(cp)
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Char *cp;
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{
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Char *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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void
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udvar(name)
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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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}
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int
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prefix(sub, str)
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Char *sub, *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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