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- /*-
- * Copyright (c) 1991 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)path.c 5.1 (Berkeley) 4/3/91";
- #endif /* not lint */
- #ifdef DF_POSIX /* DF_DSC */
- #include <misc.h>
- #include <bsdlib.h>
- #else
- #include <sys/param.h>
- #endif
- #include <stdio.h>
- #include <string.h>
- #include "cp.h"
-
- /*
- * These functions manipulate paths in PATH_T structures.
- *
- * They eliminate multiple slashes in paths when they notice them,
- * and keep the path non-slash terminated.
- *
- * Both path_set() and path_append() return 0 if the requested name
- * would be too long.
- */
-
- #define STRIP_TRAILING_SLASH(p) { \
- while ((p)->p_end > (p)->p_path && (p)->p_end[-1] == '/') \
- *--(p)->p_end = 0; \
- }
-
- /*
- * Move specified string into path. Convert "" to "." to handle BSD
- * semantics for a null path. Strip trailing slashes.
- */
- int
- #if __STDC__
- path_set (register PATH_T *p, char *string)
- #else
- path_set(p, string)
- register PATH_T *p;
- char *string;
- #endif
- {
- if (strlen(string) > MAXPATHLEN) {
- (void)fprintf(stderr,
- "%s: %s: name too long.\n", progname, string);
- return(0);
- }
-
- (void)strcpy(p->p_path, string);
- p->p_end = p->p_path + strlen(p->p_path);
-
- if (p->p_path == p->p_end) {
- *p->p_end++ = '.';
- *p->p_end = 0;
- }
-
- STRIP_TRAILING_SLASH(p);
- return(1);
- }
-
- /*
- * Append specified string to path, inserting '/' if necessary. Return a
- * pointer to the old end of path for restoration.
- */
- char *
- #if __STDC__
- path_append (register PATH_T *p, char *name, int len)
- #else
- path_append(p, name, len)
- register PATH_T *p;
- char *name;
- int len;
- #endif
- {
- char *old;
-
- old = p->p_end;
- if (len == -1)
- len = strlen(name);
-
- /* The "+ 1" accounts for the '/' between old path and name. */
- if ((len + p->p_end - p->p_path + 1) > MAXPATHLEN) {
- (void)fprintf(stderr,
- "%s: %s/%s: name too long.\n", progname, p->p_path, name);
- return(0);
- }
-
- /*
- * This code should always be executed, since paths shouldn't
- * end in '/'.
- */
- if (p->p_end[-1] != '/') {
- *p->p_end++ = '/';
- *p->p_end = 0;
- }
-
- (void)strncat(p->p_end, name, len);
- p->p_end += len;
- *p->p_end = 0;
-
- STRIP_TRAILING_SLASH(p);
- return(old);
- }
-
- /*
- * Restore path to previous value. (As returned by path_append.)
- */
- void
- #if __STDC__
- path_restore (PATH_T *p, char *old)
- #else
- path_restore(p, old)
- PATH_T *p;
- char *old;
- #endif
- {
- p->p_end = old;
- *p->p_end = 0;
- }
-
- /*
- * Return basename of path.
- */
- char *
- #if __STDC__
- path_basename (PATH_T *p)
- #else
- path_basename(p)
- PATH_T *p;
- #endif
- {
- char *basename;
-
- basename = rindex(p->p_path, '/');
- return(basename ? basename + 1 : p->p_path);
- }
-