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86 lines
3.0 KiB
Groff
86 lines
3.0 KiB
Groff
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.\" Copyright (c) 1980, 1991, 1993, 1994
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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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.\" @(#)close.2 8.2 (Berkeley) 4/19/94
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.\"
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.TH CLOSE 2 "22 January 1997" GNO "System Calls"
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.SH NAME
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.BR close
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\- delete a descriptor
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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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\fBclose\fR(int \fIfd\fR);
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.SH DESCRIPTION
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The
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.BR close
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call deletes a descriptor from the per-process file descriptor table.
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If this is the last reference to the underlying object, the
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object will be deactivated.
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For example, on the last close of a file
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the current
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.IR seek
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pointer associated with the file is lost;
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on the last close of a
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.BR socket (2)
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associated naming information and queued data are discarded;
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on the last close of a file holding an advisory lock
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the lock is released (see further
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.BR flock (2)).
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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 the global integer variable
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.IR errno
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is set to indicate the error.
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.SH ERRORS
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.BR Close
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will fail if:
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.RS
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.IP \fBEBADF\fR
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.I fd
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is not an active descriptor.
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.IP \fBEINTR\fR
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An interrupt was received.
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.RE
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.SH SEE ALSO
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.BR accept (2),
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.BR flock (2),
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.BR open (2),
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.BR pipe (2),
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.BR socket (2),
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.BR socketpair (2),
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.BR execve (2),
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.BR fcntl (2)
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.SH STANDARDS
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.BR close
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conforms to IEEE Std 1003.1-1988 (POSIX).
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