mirror of
https://github.com/GnoConsortium/gno.git
synced 2024-09-11 14:54:54 +00:00
156 lines
4.3 KiB
Groff
156 lines
4.3 KiB
Groff
.\" Copyright (c) 1991, 1993
|
|
.\" 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.
|
|
.\"
|
|
.\" @(#)getcwd.3 8.2 (Berkeley) 12/11/93
|
|
.\"
|
|
.TH GETCWD 3 "18 December 1996" GNO "Library Routines"
|
|
.SH NAME
|
|
.BR getcwd ,
|
|
.BR getwd
|
|
\- get working directory pathname
|
|
.SH SYNOPSIS
|
|
#include <unistd.h>
|
|
.sp 1
|
|
char *
|
|
\fBgetcwd\fR (char *\fIbuf\fR, size_t \fIsize\fR);
|
|
.br
|
|
char *
|
|
\fBgetwd\fR (char *\fIbuf\fR);
|
|
.SH DESCRIPTION
|
|
The
|
|
.BR getcwd
|
|
function copies the absolute pathname of the current working directory
|
|
(GS/OS prefix 0 if not NULL, otherwise GS/OS prefix 8)
|
|
into the memory referenced by
|
|
.I buf
|
|
and returns a pointer to
|
|
.IR buf .
|
|
The
|
|
.I size
|
|
argument is the size, in bytes, of the array referenced by
|
|
.IR buf .
|
|
.LP
|
|
If
|
|
.I buf
|
|
is
|
|
.BR NULL ,
|
|
space is allocated as necessary to store the pathname.
|
|
This space may later be released by
|
|
.BR free (3).
|
|
.LP
|
|
The function
|
|
.BR getwd
|
|
is a compatibility routine which calls
|
|
.BR getcwd
|
|
with its
|
|
.I buf
|
|
argument and a size of
|
|
.BR MAXPATHLEN
|
|
(as defined in the include file
|
|
.BR <sys/param.h> ).
|
|
Obviously,
|
|
.I buf
|
|
should be at least
|
|
.BR MAXPATHLEN
|
|
bytes in length.
|
|
.LP
|
|
These routines make use of the
|
|
.BR _mapPath (3)
|
|
facility.
|
|
.SH RETURN VALUES
|
|
Upon successful completion, a pointer to the pathname is returned.
|
|
Otherwise a
|
|
.BR NULL
|
|
pointer is returned and the global variable
|
|
.IR errno
|
|
is set to indicate the error.
|
|
In addition,
|
|
.BR getwd
|
|
copies the error message associated with
|
|
.IR errno
|
|
into the memory referenced by
|
|
.IR buf .
|
|
.SH COMPATIBILITY
|
|
These routines are thread safe.
|
|
.SH ERRORS
|
|
The
|
|
.BR getcwd
|
|
function
|
|
will fail if:
|
|
.RS
|
|
.IP \fBEACCESS\fR
|
|
Read or search permission was denied for a component of the pathname.
|
|
.IP \fBEINVAL\fR
|
|
The
|
|
.I size
|
|
argument is zero, or if pathname mapping is active and the current working
|
|
directory has a component which includes the slash ('/') character. See
|
|
.BR _mapPath (3).
|
|
.IP \fBENOENT\fR
|
|
A component of the pathname no longer exists.
|
|
.IP \fBENOMEM\fR
|
|
Insufficient memory is available.
|
|
.IP \fBERANGE\fR
|
|
The
|
|
.I size
|
|
argument is greater than zero but smaller than the length of the pathname
|
|
plus 1.
|
|
.RE
|
|
.SH BUGS
|
|
The
|
|
.BR getwd
|
|
function
|
|
does not do sufficient error checking and is not able to return very
|
|
long, but valid, paths.
|
|
It is provided for compatibility and should be avoided when possible.
|
|
.SH STANDARDS
|
|
The
|
|
.BR getcwd
|
|
function
|
|
conforms to
|
|
.BR "ANSI C" .
|
|
The ability to specify a
|
|
.BR NULL
|
|
pointer and have
|
|
.BR getcwd
|
|
allocate memory as necessary is an extension.
|
|
.SH HISTORY
|
|
The
|
|
.BR getwd
|
|
function appeared in
|
|
BSD 4.0.
|
|
.SH SEE ALSO
|
|
.BR chdir (2),
|
|
.BR fchdir (2),
|
|
.BR _mapPath (3),
|
|
.BR malloc (3),
|
|
.BR strerror (3)
|