2004-11-03 13:51:07 +00:00
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.\" Copyright (c) 2003 Andries Brouwer (aeb@cwi.nl)
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.\"
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.\" This is free documentation; you can redistribute it and/or
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.\" modify it under the terms of the GNU General Public License as
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.\" published by the Free Software Foundation; either version 2 of
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.\" the License, or (at your option) any later version.
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.\"
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.\" The GNU General Public License's references to "object code"
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.\" and "executables" are to be interpreted as the output of any
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.\" document formatting or typesetting system, including
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.\" intermediate and printed output.
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.\"
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.\" This manual is distributed in the hope that it will be useful,
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.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
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.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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.\" GNU General Public License for more details.
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.\"
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.\" You should have received a copy of the GNU General Public
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.\" License along with this manual; if not, write to the Free
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.\" Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111,
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.\" USA.
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.\"
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.TH AIO_RETURN 3 2003-11-14 "" "Linux Programmer's Manual"
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.SH NAME
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aio_return \- get return status of asynchronous I/O operation
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.SH SYNOPSIS
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.B "#include <aio.h>"
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.sp
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.BI "ssize_t aio_return(struct aiocb *" aiocbp );
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.SH DESCRIPTION
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The
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2005-10-19 06:54:38 +00:00
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.BR aio_return ()
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2004-11-03 13:51:07 +00:00
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function returns the final return status for the asynchronous I/O request
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with control block pointed to by
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.IR aiocbp .
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.LP
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This function should be called only once for any given request, after
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2004-12-20 10:14:48 +00:00
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.BR aio_error (3)
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2007-06-22 19:42:52 +00:00
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returns something other than
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.BR EINPROGRESS .
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2004-11-03 13:51:07 +00:00
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.SH "RETURN VALUE"
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If the asynchronous I/O operation has completed, this function returns
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the value that would have been returned in case of a synchronous
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.IR read ,
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.IR write ,
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or
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2007-09-20 16:26:31 +00:00
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.I fsync
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2004-11-03 13:51:07 +00:00
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request.
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Otherwise the return value is undefined.
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On error, the error value is returned.
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.SH ERRORS
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.TP
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.B EINVAL
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.I aiocbp
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does not point at a control block for an asynchronous I/O request
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of which the return status has not been retrieved yet.
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.SH "CONFORMING TO"
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2006-08-03 13:57:30 +00:00
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POSIX.1-2001
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2004-11-03 13:51:07 +00:00
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.SH "SEE ALSO"
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.BR aio_cancel (3),
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.BR aio_error (3),
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.BR aio_fsync (3),
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.BR aio_read (3),
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.BR aio_suspend (3),
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.BR aio_write (3)
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