149 lines
4.0 KiB
C
149 lines
4.0 KiB
C
/*-
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* Copyright (c) 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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#ifndef lint
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static char sccsid[] = "@(#)path.c 5.1 (Berkeley) 4/3/91";
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static char rcsid[] = "$Header: /cvsroot/src/bin/cp/Attic/path.c,v 1.3 1993/03/23 00:23:47 cgd Exp $";
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#endif /* not lint */
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#include <sys/param.h>
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#include <stdio.h>
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#include <string.h>
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#include "cp.h"
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/*
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* These functions manipulate paths in PATH_T structures.
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*
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* They eliminate multiple slashes in paths when they notice them,
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* and keep the path non-slash terminated.
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*
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* Both path_set() and path_append() return 0 if the requested name
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* would be too long.
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*/
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#define STRIP_TRAILING_SLASH(p) { \
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while ((p)->p_end > (p)->p_path && (p)->p_end[-1] == '/') \
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*--(p)->p_end = 0; \
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}
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/*
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* Move specified string into path. Convert "" to "." to handle BSD
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* semantics for a null path. Strip trailing slashes.
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*/
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path_set(p, string)
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register PATH_T *p;
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char *string;
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{
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if (strlen(string) > MAXPATHLEN) {
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(void)fprintf(stderr,
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"%s: %s: name too long.\n", progname, string);
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return(0);
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}
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(void)strcpy(p->p_path, string);
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p->p_end = p->p_path + strlen(p->p_path);
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if (p->p_path == p->p_end) {
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*p->p_end++ = '.';
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*p->p_end = 0;
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}
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STRIP_TRAILING_SLASH(p);
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return(1);
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}
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/*
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* Append specified string to path, inserting '/' if necessary. Return a
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* pointer to the old end of path for restoration.
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*/
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char *
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path_append(p, name, len)
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register PATH_T *p;
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char *name;
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int len;
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{
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char *old;
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old = p->p_end;
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if (len == -1)
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len = strlen(name);
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/* The "+ 1" accounts for the '/' between old path and name. */
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if ((len + p->p_end - p->p_path + 1) > MAXPATHLEN) {
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(void)fprintf(stderr,
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"%s: %s/%s: name too long.\n", progname, p->p_path, name);
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return(0);
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}
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/*
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* This code should always be executed, since paths shouldn't
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* end in '/'.
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*/
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if (p->p_end[-1] != '/') {
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*p->p_end++ = '/';
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*p->p_end = 0;
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}
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(void)strncat(p->p_end, name, len);
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p->p_end += len;
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*p->p_end = 0;
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STRIP_TRAILING_SLASH(p);
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return(old);
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}
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/*
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* Restore path to previous value. (As returned by path_append.)
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*/
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void
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path_restore(p, old)
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PATH_T *p;
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char *old;
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{
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p->p_end = old;
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*p->p_end = 0;
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}
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/*
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* Return basename of path.
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*/
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char *
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path_basename(p)
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PATH_T *p;
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{
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char *basename;
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basename = rindex(p->p_path, '/');
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return(basename ? basename + 1 : p->p_path);
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}
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