Add mising aio_* man pages. Fixed a minor typo in aio_read.2,

and "corrected" statement of Posix conformance.

6 files changed, 575 insertions, 9 deletions

diff --git a/lib/libc/sys/aio_cancel.2 b/lib/libc/sys/aio_cancel.2
new file mode 100644
index 0000000..2923a63
--- /dev/null
+++ b/lib/libc/sys/aio_cancel.2
@@ -0,0 +1,80 @@
+.\" Copyright (c) 1999 Softweyr LLC.
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY Softweyr LLC AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL Softweyr LLC OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"	$Id$
+.\"
+.Dd June 2, 1999
+.Dt AIO_CANCEL 2
+.Os
+.Sh NAME
+.Nm aio_cancel
+.Nd cancel an outstanding asynchronus I/O operation (REALTIME)
+.Sh SYNOPSIS
+.Fd #include <aio.h>
+.Ft int
+.Fn aio_cancel "int something" "struct aiocb * iocb"
+.Sh DESCRIPTION
+The
+.Fn aio_cancel
+function is supposed to cancel the specified outstanding asynchronous
+I/O request.
+.Fn aio_cancel
+is not implemented at this time, and always fails returning
+.Dv ENOSYS .
+.Sh RETURN VALUES
+When
+.Fn aio_cancel
+inevitably fails, it returns
+.Dv ENOSYS
+to signify it is not supported.
+.Sh SEE ALSO
+.Xr aio_read 2 ,
+.Xr aio_write 2 ,
+.Xr aio_error 2 ,
+.Xr aio_return 2 ,
+.Xr aio_suspend 2 .
+.Sh ERRORS
+The
+.Fn aio_cancel
+function currently always fails, due to:
+.Bl -tag -width Er
+.It Bq Er ENOSYS
+this operation is not implemented at this time.
+.El
+.Sh STANDARDS
+.Nm
+fails to conform to the
+.St -p1003.2
+standard.
+.Sh HISTORY
+The
+.Nm
+function first appeared in
+.Fx 3.0 .
+.Sh AUTHOR
+This
+manual page was written by
+.An Wes Peters Aq wes@softweyr.com .
+.Sh BUGS
+Are now movie stars.
diff --git a/lib/libc/sys/aio_error.2 b/lib/libc/sys/aio_error.2
new file mode 100644
index 0000000..c0a7551
--- /dev/null
+++ b/lib/libc/sys/aio_error.2
@@ -0,0 +1,95 @@
+.\" Copyright (c) 1999 Softweyr LLC.
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY Softweyr LLC AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL Softweyr LLC OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"	$Id$
+.\"
+.Dd June 2, 1999
+.Dt AIO_ERROR 2
+.Os
+.Sh NAME
+.Nm aio_error
+.Nd retrieve error status of asynchronus I/O operation (REALTIME)
+.Sh SYNOPSIS
+.Fd #include <aio.h>
+.Ft int
+.Fn aio_error "struct aiocb *iocb"
+.Sh DESCRIPTION
+The
+.Fn aio_error
+function returns the error status of the asynchronous I/O request
+associated with the structure pointed to by
+.Ar iocb .
+.Sh RETURN VALUES
+If the asynchronous I/O request has completed successfully,
+.Fn aio_error
+returns 0.  If the request has not yet completed,
+.Dv EINPROGRESS 
+is returned.  If the request has completed unsuccessfully the error
+status is returned as described in
+.Xr read 2 ,
+.Xr write 2 ,
+or
+.Xr fsync 2
+is returned.
+On failure,
+.Fn aio_error
+returns
+.Dv -1
+and sets
+.Dv errno
+to indicate the error condition.
+.Sh ERRORS
+The
+.Fn aio_error
+function will fail if:
+.Bl -tag -width Er
+.It Bq Er EINVAL
+.Ar iocb
+does not reference an outstanding asynchronous I/O request.
+.El
+.Sh SEE ALSO
+.Xr aio_return 2 ,
+.Xr aio_read 2 ,
+.Xr aio_write 2 ,
+.Xr aio_cancel 2 ,
+.Xr aio_suspend 2 ,
+.Xr read 2 ,
+.Xr write 2 ,
+.Xr fsync 2 .
+.Sh STANDARDS
+.Fn aio_error
+is expected to conform to the
+.St -p1003.2
+standard.
+.Sh HISTORY
+The
+.Nm
+function first appeared in
+.Fx 3.0 .
+.Sh AUTHOR
+This
+manual page was written by
+.An Wes Peters Aq wes@softweyr.com .
+.Sh BUGS
+Taste icky.
diff --git a/lib/libc/sys/aio_read.2 b/lib/libc/sys/aio_read.2
index 9e6b532..524daaf 100644
--- a/lib/libc/sys/aio_read.2
+++ b/lib/libc/sys/aio_read.2
@@ -85,6 +85,12 @@ member of that structure references must remain valid until the
 operation has completed.  For this reason, use of auto (stack) variables
 for these objects is discouraged.
 .Pp
+The asynchronous I/O control buffer
+.Ar iocb
+should be zeroed before the 
+.Fn aio_read
+call to avoid passing bogus context information to the kernel.
+.Pp
 Modifications of the Asynchronous I/O Control Block structure or the
 buffer contents after the request has been enqueued, but before the
 request has completed, are not allowed.
@@ -96,12 +102,6 @@ is past the offset maximum  for
 no I/O will occur.
 .Sh RETURN VALUES
 .Rv -std aio_read
-.Sh STANDARDS
-The
-.Fn aio_read
-call conforms to the
-.St -p1003.2
-standard.
 .Sh DIAGNOSTICS
 None.
 .Sh ERRORS
@@ -127,7 +127,7 @@ returns -1 and sets
 appropriately; otherwise the
 .Fn aio_return
 function must be called, and will return -1, and
-Fn aio_error
+.Fn aio_error
 must be called to determine the actual calue that would have been
 returned in
 .Ar errno .
@@ -176,14 +176,24 @@ The offset
 .Ar iocb->aio_offset
 would be invalid.
 .El
+.Sh STANDARDS
+The
+.Fn aio_read
+call is expected to conform to the
+.St -p1003.2
+standard.
 .Sh HISTORY
 The
 .Nm
-Function first appeared in
+function first appeared in
 .Fx 3.0 .
 .Sh AUTHOR
 This
 manual page was written by
 .An Terry Lambert Aq terry@whistle.com .
 .Sh BUGS
-The value of iocb->aio_offset is ignored.
+The value of
+.Ar iocb->aio_offset
+is ignored.  Invalid information in 
+.Ar iocb->_aiocb_private
+may confuse the kernel.
diff --git a/lib/libc/sys/aio_return.2 b/lib/libc/sys/aio_return.2
new file mode 100644
index 0000000..82baae2
--- /dev/null
+++ b/lib/libc/sys/aio_return.2
@@ -0,0 +1,97 @@
+.\" Copyright (c) 1999 Softweyr LLC.
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY Softweyr LLC AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL Softweyr LLC OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"	$Id$
+.\"
+.Dd June 2, 1999
+.Dt AIO_RETURN 2
+.Os
+.Sh NAME
+.Nm aio_return
+.Nd retrieve return status of asynchronus I/O operation (REALTIME)
+.Sh SYNOPSIS
+.Fd #include <aio.h>
+.Ft int
+.Fn aio_return "struct aiocb *iocb"
+.Sh DESCRIPTION
+The
+.Fn aio_return
+function returns the final status of the asynchronous I/O request
+associated with the structure pointed to by
+.Ar iocb .
+.Pp
+.Fn aio_return
+should only be called once, to obtain the final status of an asynchronous
+I/O operation once 
+.Xr aio_error 2
+returns something other than
+.Dv EINPROGRESS .
+.Sh RETURN VALUES
+If the asynchronous I/O request has completed, the status is returned
+as described in
+.Xr read 2 ,
+.Xr write 2 ,
+or
+.Xr fsync 2 .
+On failure,
+.Fn aio_return
+returns
+.Dv -1 
+and sets
+.Dv errno
+to indicate the error condition.
+.Sh SEE ALSO
+.Xr aio_error 2 ,
+.Xr aio_read 2 ,
+.Xr aio_write 2 ,
+.Xr aio_cancel 2 ,
+.Xr aio_suspend 2 ,
+.Xr read 2 ,
+.Xr write 2 ,
+.Xr fsync 2 .
+.Sh ERRORS
+The
+.Fn aio_return
+function will fail if:
+.Bl -tag -width Er
+.It Bq Er EINVAL
+.Ar iocb
+does not reference an outstanding asynchronous I/O request.
+.El
+.Sh STANDARDS
+.Fn aio_return
+is expected to conform to the
+.St -p1003.2
+standard.
+.Sh HISTORY
+The
+.Nm
+function first appeared in
+.Fx 3.0 .
+.Sh AUTHOR
+This
+manual page was written by
+.An Wes Peters Aq wes@softweyr.com .
+.Sh BUGS
+Taste great!
diff --git a/lib/libc/sys/aio_suspend.2 b/lib/libc/sys/aio_suspend.2
new file mode 100644
index 0000000..01c635c
--- /dev/null
+++ b/lib/libc/sys/aio_suspend.2
@@ -0,0 +1,92 @@
+.\" Copyright (c) 1999 Softweyr LLC.
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY Softweyr LLC AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL Softweyr LLC OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"	$Id$
+.\"
+.Dd June 2, 1999
+.Dt AIO_SUSPEND 2
+.Os
+.Sh NAME
+.Nm aio_suspend
+.Nd suspend until asynchronus I/O operations or timeout complete (REALTIME)
+.Sh SYNOPSIS
+.Fd #include <aio.h>
+.Ft int
+.Fn aio_suspend "const struct aiocb * const iocbs[]" "int niocb" "const struct timespec * timeout"
+.Sh DESCRIPTION
+The
+.Fn aio_suspend
+function suspends the calling process until all of the specified
+asynchronous I/O requests have completed or the
+.Ar timeout
+has passed.
+.Ar iocbs
+is an array of 
+.Ar niocb
+pointers to asynchronous I/O requests.  Array members containing NULL
+will be silently ignored.
+.Sh RETURN VALUES
+If all of the specified asynchronous I/O requests have completed, 
+.Fn aio_suspend
+returns 0. If the 
+.Ar timeout
+expired,
+.Dv EAGAIN
+is returned.  Other return values indicate an error condition as
+detailed below.
+.Sh SEE ALSO
+.Xr aio_error 2 ,
+.Xr aio_read 2 ,
+.Xr aio_write 2 ,
+.Xr aio_cancel 2 ,
+.Xr aio_suspend 2.
+.Sh ERRORS
+The
+.Fn aio_suspend
+function will fail if:
+.Bl -tag -width Er
+.It Bq Er EINVAL
+.Ar iocbs
+contains more than
+.Dv AIO_LISTIO_MAX aysynchronous I/O requests, or at least one 
+of the requests is not valid.
+.It Bq Er EINTR
+the suspend was interrupted by a signal.
+.El
+.Sh STANDARDS
+.Fn aio_suspend
+is expected to conform to the
+.St -p1003.2
+standard.
+.Sh HISTORY
+The
+.Nm
+function first appeared in
+.Fx 3.0 .
+.Sh AUTHOR
+This
+manual page was written by
+.An Wes Peters Aq wes@softweyr.com .
+.Sh BUGS
+Have six legs.
diff --git a/lib/libc/sys/aio_write.2 b/lib/libc/sys/aio_write.2
new file mode 100644
index 0000000..231ea73c
--- /dev/null
+++ b/lib/libc/sys/aio_write.2
@@ -0,0 +1,192 @@
+.\" Copyright (c) 1999 Softweyr LLC.
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY Softweyr LLC AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL Softweyr LLC OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"	$Id$
+.\"
+.Dd June 2, 1999
+.Dt AIO_WRITE 2
+.Os
+.Sh NAME
+.Nm aio_write
+.Nd asynchronus write to a file (REALTIME)
+.Sh SYNOPSIS
+.Fd #include <aio.h>
+.Ft int
+.Fn aio_write "struct aiocb *iocb"
+.Sh DESCRIPTION
+The
+.Fn aio_write
+function allows the calling process to write
+.Ar iocb->aio_nbytes
+from the buffer pointed to by
+.Ar iocb->aio_buf
+to the descriptor
+.Ar iocb->aio_fildes .
+The call returns immediately after the write request has been enqueued
+to the descriptor; the write may or may not have completed at the time
+the call returns.  If the request could not be enqueued, generally due
+to invalid arguments, the call returns without having enqueued the
+request.
+.Pp
+If 
+.Dv O_APPEND 
+is set for 
+.Ar iocb->aio_fildes ,
+.Fn aio_write
+operations append to the file in the same order as the calls were
+made.  If
+.Dv O_APPEND
+is not set for the file descriptor, the write operation will occur at
+the absolute position from the beginning of the file plus
+.Ar iocb->aio_offset .
+.Pp
+If
+.Dv _POSIX_PRIORITIZED_IO 
+is defined, and the descriptor supports it, then the enqueued
+operation is submitted at a priority equal to that of the calling
+process minus
+.Ar iocb->aio_reqprio .
+.Pp
+The
+.Ar iocb
+pointer may be subsequently used as an argument to
+.Fn aio_return
+and
+.Fn aio_error
+in order to determine return or error status for the enqueued operation
+while it is in progress.
+.Pp
+If the request is successfully enqueued, the value of
+.Ar iocb->aio_offset
+can be modified during the request as context, so this value must not
+be referenced after the request is enqueued.
+.Sh RESTRICTIONS
+The Asynchronous I/O Control Block structure pointed to by
+.Ar iocb
+and the buffer that the
+.Ar iocb->aio_buf
+member of that structure references must remain valid until the
+operation has completed.  For this reason, use of auto (stack) variables
+for these objects is discouraged.
+.Pp 
+The asynchronous I/O control buffer
+.Ar iocb
+should be zeroed before the
+.Fn aio_read
+call to avoid passing bogus context information to the kernel.
+.Pp
+Modifications of the Asynchronous I/O Control Block structure or the
+buffer contents after the request has been enqueued, but before the
+request has completed, are not allowed.
+.Pp
+If the file offset in
+.Ar iocb->aio_offset
+is past the offset maximum  for
+.Ar iocb->aio_fildes ,
+no I/O will occur.
+.Sh RETURN VALUES
+.Rv -std aio_write
+.Sh ERRORS
+The
+.Fn aio_write
+function will fail if:
+.Bl -tag -width Er
+.It Bq Er EAGAIN
+The request was not queued because of system resource limitations.
+.It Bq Er ENOSYS
+The
+.Fn aio_write
+call is not supported.
+.El
+.Pp
+The following conditions may be synchronously detected when the
+.Fn aio_write
+call is made, or asynchronously, at any time thereafter.  If they
+are detected at call time,
+.Fn aio_write
+returns -1 and sets
+.Ar errno
+appropriately; otherwise the
+.Fn aio_return
+function must be called, and will return -1, and
+.Fn aio_error
+must be called to determine the actual calue that would have been
+returned in
+.Ar errno .
+.Pp
+.Bl -tag -width Er
+.It Bq Er EBADF
+.Ar iocb->aio_fildes
+is invalid, or is not opened for writing.
+.It Bq Er EINVAL
+The offset
+.Ar iocb->aio_offset
+is not valid, the priority specified by
+.Ar iocb->aio_reqprio
+is not a valid priority, or the number of bytes specified by
+.Ar iocb->aio_nbytes
+is not valid.
+.El
+.Pp
+If the request is successfully enqueued, but subsequently cancelled
+or an error occurs, the value returned by the
+.Fn aio_return
+function is per the
+.Xr write 2
+call, and the value returned by the
+.Fn aio_error
+function is either one of the error returns from the
+.Xr write 2
+call, or one of:
+.Bl -tag -width Er
+.It Bq Er EBADF
+.Ar iocb->aio_fildes
+is invalid for writing.
+.It Bq Er ECANCELED
+The request was explicitly cancelled via a call to
+.Fn aio_cancel .
+.It Bq Er EINVAL
+The offset
+.Ar iocb->aio_offset
+would be invalid.
+.El
+.Sh STANDARDS
+.Fn aio_write
+is expected to conform to the
+.St -p1003.2
+standard.
+.Sh HISTORY
+The
+.Nm
+Function first appeared in
+.Fx 3.0 .
+.Sh AUTHOR
+This manual page was written by
+.An Wes Peters Aq wes@softweyr.com .
+.Sh BUGS
+Asynchronous I/O operations cannot be cancelled in this implementation.
+Invalid information in
+.Ar iocb->_aiocb_private
+may confuse the kernel.
+