* Copyright (c) 1991 The Regents of the University of California.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* 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
static char sccsid
[] = "@(#)path.c 5.1 (Berkeley) 4/3/91";
* 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
#define STRIP_TRAILING_SLASH(p) { \
while ((p)->p_end > (p)->p_path && (p)->p_end[-1] == '/') \
* Move specified string into path. Convert "" to "." to handle BSD
* semantics for a null path. Strip trailing slashes.
if (strlen(string
) > MAXPATHLEN
) {
"%s: %s: name too long.\n", progname
, string
);
(void)strcpy(p
->p_path
, string
);
p
->p_end
= p
->p_path
+ strlen(p
->p_path
);
if (p
->p_path
== p
->p_end
) {
* Append specified string to path, inserting '/' if necessary. Return a
* pointer to the old end of path for restoration.
path_append(p
, name
, len
)
/* The "+ 1" accounts for the '/' between old path and name. */
if ((len
+ p
->p_end
- p
->p_path
+ 1) > MAXPATHLEN
) {
"%s: %s/%s: name too long.\n", progname
, p
->p_path
, name
);
* This code should always be executed, since paths shouldn't
if (p
->p_end
[-1] != '/') {
(void)strncat(p
->p_end
, name
, len
);
* Restore path to previous value. (As returned by path_append.)
* Return basename of path.
basename
= rindex(p
->p_path
, '/');
return(basename
? basename
+ 1 : p
->p_path
);