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+.TH aio_write 3 2002-09-12 "Linux 2.4" Linux AIO"
+.SH NAME
+aio_write  \-  Initiate an asynchronous write operation
+.SH SYNOPSYS
+.nf
+.B #include <errno.h>
+.sp
+.br 
+.B #include <aio.h>
+.sp
+.br
+.BI "int aio_write (struct aiocb * aiocbp);"
+.fi
+.SH DESCRIPTION
+This function initiates an asynchronous write operation.  The function
+call immediately returns after the operation was enqueued or if before
+this happens an error was encountered.
+
+The first 
+.IR "aiocbp->aio_nbytes"
+bytes from the buffer starting at
+.IR "aiocbp->aio_buf"
+are written to the file for which
+.IR "aiocbp->aio_fildes"
+is an descriptor, starting at the absolute
+position 
+.IR "aiocbp->aio_offset"
+in the file.
+
+If prioritized I/O is supported by the platform, the
+.IR "aiocbp->aio_reqprio "
+value is used to adjust the priority before
+the request is actually enqueued.
+
+The calling process is notified about the termination of the read
+request according to the 
+.IR "aiocbp->aio_sigevent"
+value.
+
+When 
+.IR "aio_write"
+returns, the return value is zero if no error
+occurred that can be found before the process is enqueued.  If such an
+early error is found the function returns 
+.IR -1
+and sets
+.IR "errno"
+to one of the following values.
+
+.TP
+.B EAGAIN
+The request was not enqueued due to (temporarily) exceeded resource
+limitations.
+.TP
+.B ENOSYS
+The 
+.IR "aio_write"
+function is not implemented.
+.TP
+.B EBADF
+The 
+.IR "aiocbp->aio_fildes"
+descriptor is not valid.  This condition
+may not be recognized before enqueueing the request, and so this error
+might also be signaled asynchronously.
+.TP
+.B EINVAL
+The 
+.IR "aiocbp->aio_offset"
+or
+.IR "aiocbp->aio_reqprio"
+value is
+invalid.  This condition may not be recognized before enqueueing the
+request and so this error might also be signaled asynchronously.
+.PP
+
+In the case 
+.IR "aio_write"
+returns zero, the current status of the
+request can be queried using 
+.IR "aio_error"
+and 
+.IR "aio_return"
+functions.  As long as the value returned by 
+.IR "aio_error"
+is
+.IR "EINPROGRESS"
+the operation has not yet completed.  If
+.IR "aio_error"
+returns zero, the operation successfully terminated,
+otherwise the value is to be interpreted as an error code.  If the
+function terminated, the result of the operation can be get using a call
+to 
+.IR "aio_return"
+.  The returned value is the same as an equivalent
+call to 
+.IR "read"
+would have returned.  Possible error codes returned
+by 
+.IR "aio_error"
+are:
+
+.TP
+.B EBADF
+The 
+.IR "aiocbp->aio_fildes"
+descriptor is not valid.
+.TP
+.B ECANCELED
+The operation was canceled before the operation was finished.
+.TP
+.B EINVAL
+The 
+.IR "aiocbp->aio_offset"
+value is invalid.
+.PP
+When the sources are compiled with 
+.IR "_FILE_OFFSET_BITS == 64"
+, this
+function is in fact 
+.IR "aio_write64"
+since the LFS interface transparently
+replaces the normal implementation.
+.SH "RETURN VALUES"
+When 
+.IR "aio_write"
+returns, the return value is zero if no error
+occurred that can be found before the process is enqueued.  If such an
+early error is found the function returns 
+.IR -1
+and sets
+.IR "errno"
+to one of the following values.
+.SH ERRORS
+.TP
+.B EAGAIN
+The request was not enqueued due to (temporarily) exceeded resource
+limitations.
+.TP
+.B ENOSYS
+The 
+.IR "aio_write"
+function is not implemented.
+.TP
+.B EBADF
+The 
+.IR "aiocbp->aio_fildes"
+descriptor is not valid.  This condition
+may not be recognized before enqueueing the request, and so this error
+might also be signaled asynchronously.
+.TP
+.B EINVAL
+The 
+.IR "aiocbp->aio_offset"
+or
+.IR "aiocbp->aio_reqprio"
+value is
+invalid.  This condition may not be recognized before enqueueing the
+request and so this error might also be signaled asynchronously.
+.SH "SEE ALSO"
+.BR aio(3),
+.BR aio_cancel(3),
+.BR aio_cancel64(3),
+.BR aio_error(3),
+.BR aio_error64(3),
+.BR aio_fsync(3),
+.BR aio_fsync64(3),
+.BR aio_init(3),
+.BR aio_read(3),
+.BR aio_read64(3),
+.BR aio_return(3),
+.BR aio_return64(3),
+.BR aio_suspend(3),
+.BR aio_suspend64(3),
+.BR aio_write64(3),
+.BR errno(3),