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81 lines
3.1 KiB
Groff
81 lines
3.1 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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.\" @(#)unlink.2 8.1 (Berkeley) 6/4/93
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.\"
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.TH UNLINK 2 "24 January 1997" GNO "System Calls"
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.SH NAME
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.BR unlink
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\- remove directory entry
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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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\fBunlink\fR (const char *\fIpath\fR);
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.SH DESCRIPTION
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The
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.BR unlink
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function
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removes the link named by
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.I path
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from its directory and decrements the link count of the
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file which was referenced by the link.
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If that decrement reduces the link count of the file
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to zero,
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and no process has the file open, then
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all resources associated with the file are reclaimed.
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If one or more process have the file open when the last link is removed,
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the link is removed, but the removal of the file is delayed until
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all references to it have been closed.
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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 the error.
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.SH BUGS
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Under currently available filesystems, there can be only a single link
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to a given file.
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.LP
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The GNO
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.BR unlink ,
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unlike its UNIX counterpart, cannot currently unlink an open file.
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Attempting to do so will return an error, and the file will still exist
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when closed.
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.SH SEE ALSO
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.BR close (2),
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.BR link (2),
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.BR rmdir (2)
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.BR symlink (7)
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.SH HISTORY
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An
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.BR unlink
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function call appeared in Version 6 AT&T UNIX.
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