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+.\" Copyright (c) 2003 Andries Brouwer (aeb@cwi.nl)
+.\"
+.\" This is free documentation; you can redistribute it and/or
+.\" modify it under the terms of the GNU General Public License as
+.\" published by the Free Software Foundation; either version 2 of
+.\" the License, or (at your option) any later version.
+.\"
+.\" The GNU General Public License's references to "object code"
+.\" and "executables" are to be interpreted as the output of any
+.\" document formatting or typesetting system, including
+.\" intermediate and printed output.
+.\"
+.\" This manual is distributed in the hope that it will be useful,
+.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
+.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+.\" GNU General Public License for more details.
+.\"
+.\" You should have received a copy of the GNU General Public
+.\" License along with this manual; if not, write to the Free
+.\" Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111,
+.\" USA.
+.\"
+.TH AIO_ERROR 3 2003-11-14  "" "Linux Programmer's Manual"
+.SH NAME
+aio_error \- get error status of asynchronous I/O operation
+.SH SYNOPSIS
+.sp
+.B "#include <aio.h>"
+.sp
+.BI "int aio_error(const struct aiocb *" aiocbp );
+.sp
+.SH DESCRIPTION
+The
+.B aio_error
+function returns the error status for the asynchronous I/O request
+with control block pointed to by
+.IR aiocbp .
+.SH "RETURN VALUE"
+This function returns EINPROGRESS if the request has not been
+completed yet. It returns ECANCELED if the request was cancelled.
+It returns 0 if the request completed successfully.
+Otherwise an error value is returned, the same value that would have
+been stored in the
+.I errno
+variable in case of a synchronous
+.IR read ,
+.IR write ,
+.IR fsync ,
+or
+.I fdatasync
+request.
+On error, the error value is returned.
+.SH ERRORS
+.TP
+.B EINVAL
+.I aiocbp
+does not point at a control block for an asynchronous I/O request
+of which the return status (see
+.BR aio_return (3))
+has not been retrieved yet.
+.SH "CONFORMING TO"
+POSIX 1003.1-2003
+.SH "SEE ALSO"
+.BR aio_cancel (3),
+.BR aio_fsync (3),
+.BR aio_read (3),
+.BR aio_return (3),
+.BR aio_suspend (3),
+.BR aio_write (3)