517 lines
9.0 KiB
C
517 lines
9.0 KiB
C
/* $Header: /src/pub/tcsh/sh.misc.c,v 3.23 1997/02/23 19:03:23 christos Exp $ */
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/*
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* sh.misc.c: Miscelaneous functions
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*/
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/*-
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* Copyright (c) 1980, 1991 The Regents of the University of California.
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* 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 "sh.h"
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RCSID("$Id: sh.misc.c,v 3.23 1997/02/23 19:03:23 christos Exp $")
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static int renum __P((int, int));
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static Char **blkend __P((Char **));
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static Char **blkcat __P((Char **, Char **));
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/*
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* C Shell
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*/
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int
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any(s, c)
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register char *s;
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register 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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register const char *s;
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{
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char *n;
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register char *p;
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if (s == NULL)
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s = (const char *) "";
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for (p = (char *) s; *p++ != '\0';)
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continue;
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n = p = (char *) xmalloc((size_t)
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((((const char *) 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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static Char **
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blkend(up)
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register 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(av)
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register Char **av;
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{
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for (; *av; av++) {
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xprintf("%S", *av);
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if (av[1])
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xprintf(" ");
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}
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}
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void
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blkexpand(av, str)
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register Char **av;
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Char *str;
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{
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*str = '\0';
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for (; *av; av++) {
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(void) Strcat(str, *av);
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if (av[1])
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(void) Strcat(str, STRspace);
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}
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}
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int
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blklen(av)
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register Char **av;
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{
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register 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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register Char **bv;
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{
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register 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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static 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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register 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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register Char **v;
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{
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register 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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#if !defined(SHORT_STRINGS) && !defined(POSIX)
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char *
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strstr(s, t)
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register const char *s, *t;
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{
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do {
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register const char *ss = s;
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register const char *tt = t;
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do
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if (*tt == '\0')
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return ((char *) 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 /* !SHORT_STRINGS && !POSIX */
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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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register 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++ != '\0';)
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continue;
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for (q = dp; *q++ != '\0';)
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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++) != '\0';)
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continue;
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for (p--, q = dp; (*p++ = *q++) != '\0';)
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continue;
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return (ep);
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}
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#endif /* !SHORT_STRINGS */
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Char **
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blkspl(up, vp)
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register Char **up, **vp;
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{
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register 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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register 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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register int f;
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#ifdef YPBUGS
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/* suggested by Justin Bur; thanks to Karl Kleinpaste */
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fix_yp_bugs();
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#endif /* YPBUGS */
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for (f = 0; f < NOFILE; f++)
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if (f != SHIN && f != SHOUT && f != SHDIAG && f != OLDSTD &&
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f != FSHTTY
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#ifdef MALLOC_TRACE
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&& f != 25
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#endif /* MALLOC_TRACE */
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)
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{
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(void) close(f);
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#ifdef NISPLUS
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if(f < 3)
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(void) open(_PATH_DEVNULL, O_RDONLY);
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#endif /* NISPLUS */
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}
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}
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#ifndef CLOSE_ON_EXEC
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/*
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* Close files before executing a file.
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* We could be MUCH more intelligent, since (on a version 7 system)
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* we need only close files here during a source, the other
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* shell fd's being in units 16-19 which are closed automatically!
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*/
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void
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closech()
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{
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register int f;
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if (didcch)
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return;
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didcch = 1;
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SHIN = 0;
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SHOUT = 1;
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SHDIAG = 2;
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OLDSTD = 0;
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isoutatty = isatty(SHOUT);
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isdiagatty = isatty(SHDIAG);
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for (f = 3; f < NOFILE; f++)
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(void) close(f);
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}
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#endif /* CLOSE_ON_EXEC */
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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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#ifdef NISPLUS
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{
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int fd = open(_PATH_DEVNULL, O_RDONLY);
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(void) dup2(fd, 1);
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(void) dup2(fd, 2);
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if (fd != 0) {
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(void) dup2(fd, 0);
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(void) close(fd);
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}
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}
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#endif /*NISPLUS*/
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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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register 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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#ifdef HAVEDUP2
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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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#endif
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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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register 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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#ifdef HAVEDUP2
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(void) dup2(i, j);
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return (j);
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#else
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(void) close(j);
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#endif
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}
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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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register int i, j;
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{
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register 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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register Char **v;
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register int c;
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{
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register 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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register Char **v;
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{
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register Char **nv =
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(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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register 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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register 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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Char *
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quote(cp)
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Char *cp;
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{
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register Char *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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Char *
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quote_meta(d, s)
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Char *d;
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const Char *s;
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{
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Char *r = d;
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while (*s != '\0') {
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if (cmap(*s, _META | _DOL | _QF | _QB | _ESC | _GLOB))
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*d++ = '\\';
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*d++ = *s++;
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}
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*d = '\0';
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return r;
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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(short2str(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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register 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++ & TRIM) != (*str++ & TRIM))
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return (0);
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}
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}
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