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111 lines
3.7 KiB
Groff
111 lines
3.7 KiB
Groff
.\" Copyright (c) 1980, 1991, 1993
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.\" The Regents of the University of California. 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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.\" @(#)chdir.2 8.2 (Berkeley) 12/11/93
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.\"
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.TH CHDIR 2 "26 January 1997" GNO "System Calls"
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.SH NAME
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.BR chdir ,
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.BR fchdir
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\- change current working directory
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.SH SYNOPSIS
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#include <unistd.h>
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.sp 1
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int
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\fBchdir\fR (const char *\fIpath\fR);
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.br
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int
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\fBfchdir\fR (int \fIfd\fR);
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.SH DESCRIPTION
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The
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.I path
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argument points to the pathname of a directory.
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The
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.BR chdir
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function
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causes the named directory
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to become the current working directory, that is,
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the starting point for path searches of pathnames not beginning with
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a slash
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.RB ( / ),
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a colon
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.RB ( : ),
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or a device name.
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.LP
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The
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.BR fchdir
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function
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causes the directory referenced by
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.I fd
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to become the current working directory,
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the starting point for path searches of pathnames not beginning with
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a slash
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.RB ( / ),
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a colon
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.RB ( : ),
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or a device name.
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.LP
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Under GNO, these calls are wrappers to the GS/OS
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.BR SetPrefix
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call. If the length of
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.IR path
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is equal to or less than 64 characters, both GS/OS prefix 0 (zero)
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and 8 will be set. If the length of
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.IR path
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is over 64 characters, then GS/OS prefix 0 is set to a zero length
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string and prefix 8 is set to the value of
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.IR path .
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.LP
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If an error occurs in setting prefix 8 or both prefixes 0 and 8, then neither
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prefix will be set and these calls fail. If the setting of prefix 8
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succeeds but an error occurs when setting prefix 0, then prefix 0 is set
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to a zero length string. In the latter case these calls are considered
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to have succeeded.
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.LP
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In order for a directory to become the current directory,
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a process must have execute (search) access to the directory.
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.SH RETURN VALUES
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Upon successful completion, a value of 0 is returned.
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Otherwise, a value of -1 is returned and
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.IR errno
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is set to indicate
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the error.
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.SH SEE ALSO
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.BR chroot (2)
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.SH STANDARDS
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.BR chdir
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is expected to conform to IEEE Std 1003.1-1988 (POSIX).
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.SH HISTORY
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The
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.BR fchdir
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function call
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appeared in 4.2BSD.
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