gno/usr.man/man2/close.2
1997-02-27 07:32:31 +00:00

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.\" @(#)close.2 8.2 (Berkeley) 4/19/94
.\"
.TH CLOSE 2 "22 January 1997" GNO "System Calls"
.SH NAME
.BR close
\- delete a descriptor
.SH SYNOPSIS
#include <unistd.h>
.sp 1
int
\fBclose\fR(int \fIfd\fR);
.SH DESCRIPTION
The
.BR close
call deletes a descriptor from the per-process file descriptor table.
If this is the last reference to the underlying object, the
object will be deactivated.
For example, on the last close of a file
the current
.IR seek
pointer associated with the file is lost;
on the last close of a
.BR socket (2)
associated naming information and queued data are discarded;
on the last close of a file holding an advisory lock
the lock is released (see further
.BR flock (2)).
.SH RETURN VALUES
Upon successful completion, a value of 0 is returned.
Otherwise, a value of -1 is returned and the global integer variable
.IR errno
is set to indicate the error.
.SH ERRORS
.BR Close
will fail if:
.RS
.IP \fBEBADF\fR
.I fd
is not an active descriptor.
.IP \fBEINTR\fR
An interrupt was received.
.RE
.SH SEE ALSO
.BR accept (2),
.BR flock (2),
.BR open (2),
.BR pipe (2),
.BR socket (2),
.BR socketpair (2),
.BR execve (2),
.BR fcntl (2)
.SH STANDARDS
.BR close
conforms to IEEE Std 1003.1-1988 (POSIX).