xref: /illumos-gate/usr/src/man/man2/resolvepath.2 (revision 6446bd46ed1b4e9f69da153665f82181ccaedad5)
te
Copyright (c) 1997, Sun Microsystems, Inc. All Rights Reserved
The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
RESOLVEPATH 2 "May 12, 1997"
NAME
resolvepath - resolve all symbolic links of a path name
SYNOPSIS

#include <unistd.h>

int resolvepath(const char *path, char *buf, size_t bufsiz);
DESCRIPTION

The resolvepath() function fully resolves all symbolic links in the path name path into a resulting path name free of symbolic links and places the resulting path name in the buffer buf which has size bufsiz. The resulting path name names the same file or directory as the original path name. All ``.'' components are eliminated and every non-leading ``..'' component is eliminated together with its preceding directory component. If leading ``..'' components reach to the root directory, they are replaced by ``/''. If the number of bytes in the resulting path name is less than bufsiz, the contents of the remainder of buf are unspecified.

RETURN VALUES

Upon successful completion, resolvepath() returns the count of bytes placed in the buffer. Otherwise, it returns -1, leaves the buffer unchanged, and sets errno to indicate the error.

ERRORS

The resolvepath() function will fail if: EACCES

Search permission is denied for a component of the path prefix of path or for a path prefix component resulting from the resolution of a symbolic link.

EFAULT

The path or buf argument points to an illegal address.

EIO

An I/O error occurred while reading from the file system.

ENOENT

The path argument is an empty string or a component of path or a path name component produced by resolving a symbolic link does not name an existing file.

ELOOP

Too many symbolic links were encountered in resolving path.

ENAMETOOLONG

The length of path exceeds PATH_MAX, or a path name component is longer than NAME_MAX. Path name resolution of a symbolic link produced an intermediate result whose length exceeds PATH_MAX or a component whose length exceeds NAME_MAX.

ENOTDIR

A component of the path prefix of path or of a path prefix component resulting from the resolution of a symbolic link is not a directory.

USAGE

No more than PATH_MAX bytes will be placed in the buffer. Applications should not assume that the returned contents of the buffer are null-terminated.

SEE ALSO

readlink (2), realpath (3C)