xnu-4903.270.47.tar.gz

[apple/xnu.git] / bsd / man / man2 / aio_read.2

diff --git a/bsd/man/man2/aio_read.2 b/bsd/man/man2/aio_read.2
index e0ef5a537819b68547b3151b184cdbd941cc1daf..fd3a53c31904cfab8f0098c2d414837098a89285 100644 (file)
--- a/bsd/man/man2/aio_read.2
+++ b/bsd/man/man2/aio_read.2
@@ -35,36 +35,38 @@
 .Sh SYNOPSIS
 .In aio.h
 .Ft int
 .Sh SYNOPSIS
 .In aio.h
 .Ft int

-.Fn aio_read "struct aiocb *iocb"
+.Fo aio_read
+.Fa "struct aiocb *aiocbp"
+.Fc

 .Sh DESCRIPTION
 The
 .Fn aio_read
 system call allows the calling process to read
 .Sh DESCRIPTION
 The
 .Fn aio_read
 system call allows the calling process to read

-.Fa iocb->aio_nbytes
+.Fa aiocbp->aio_nbytes

 from the descriptor
 from the descriptor

-.Fa iocb->aio_fildes
+.Fa aiocbp->aio_fildes ,

 beginning at the offset
 beginning at the offset

-.Fa iocb->aio_offset
+.Fa aiocbp->aio_offset ,

 into the buffer pointed to by
 into the buffer pointed to by

-.Fa iocb->aio_buf .
+.Fa aiocbp->aio_buf .

 The call returns immediately after the read request has
 The call returns immediately after the read request has

-been enqueued to the descriptor; the read may or may not have
-completed at the time the call returns.
+been enqueued to the descriptor;
+the read may or may not have completed at the time the call returns.

 .Pp
 If _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
 .Pp
 If _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

-.Fa iocb->aio_reqprio .
+.Fa aiocbp->aio_reqprio .

 .Pp
 The
 .Pp
 The

-.Fa iocb->aio_lio_opcode
+.Fa aiocbp->aio_lio_opcode

 argument
 is ignored by the
 .Fn aio_read
 system call.
 .Pp
 The
 argument
 is ignored by the
 .Fn aio_read
 system call.
 .Pp
 The

-.Fa iocb
+.Fa aiocbp

 pointer may be subsequently used as an argument to
 .Fn aio_return
 and
 pointer may be subsequently used as an argument to
 .Fn aio_return
 and


@@ -76,20 +78,20 @@ If the request could not be enqueued (generally due to invalid arguments),
 then the call returns without having enqueued the request.
 .Pp
 If the request is successfully enqueued, the value of
 then the call returns without having enqueued the request.
 .Pp
 If the request is successfully enqueued, the value of

-.Fa iocb->aio_offset
+.Fa aiocbp->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
 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

-.Fa iocb
+.Fa aiocbp

 and the buffer that the
 and the buffer that the

-.Fa iocb->aio_buf
+.Fa aiocbp->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
 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

-.Fa iocb
+.Fa aiocbp

 should be zeroed before the
 .Fn aio_read
 call to avoid passing bogus context information to the kernel.
 should be zeroed before the
 .Fn aio_read
 call to avoid passing bogus context information to the kernel.


@@ -99,9 +101,9 @@ buffer contents after the request has been enqueued, but before the
 request has completed, are not allowed.
 .Pp
 If the file offset in
 request has completed, are not allowed.
 .Pp
 If the file offset in

-.Fa iocb->aio_offset
+.Fa aiocbp->aio_offset

 is past the offset maximum  for
 is past the offset maximum  for

-.Fa iocb->aio_fildes ,
+.Fa aiocbp->aio_fildes ,

 no I/O will occur.
 .Sh RETURN VALUES
 .Rv -std aio_read
 no I/O will occur.
 .Sh RETURN VALUES
 .Rv -std aio_read


@@ -112,8 +114,11 @@ The
 .Fn aio_read
 system call will fail if:
 .Bl -tag -width Er
 .Fn aio_read
 system call will fail if:
 .Bl -tag -width Er

+.\" ==========

 .It Bq Er EAGAIN
 .It Bq Er EAGAIN

-The request was not queued because of system resource limitations.
+Because of system resource limitations,
+the request was not queued.
+.\" ==========

 .It Bq Er ENOSYS
 The
 .Fn aio_read
 .It Bq Er ENOSYS
 The
 .Fn aio_read


@@ -122,40 +127,45 @@ system call is not supported.
 .Pp
 The following conditions may be synchronously detected when the
 .Fn aio_read
 .Pp
 The following conditions may be synchronously detected when the
 .Fn aio_read

-system call is made, or asynchronously, at any time thereafter.  If they
-are detected at call time,
+system call is made, or asynchronously, at any time thereafter.
+If they are detected at call time,

 .Fn aio_read
 returns -1 and sets
 .Va errno
 .Fn aio_read
 returns -1 and sets
 .Va errno

-appropriately; otherwise the
+appropriately.
+Otherwise, the

 .Fn aio_return
 .Fn aio_return

-system call must be called, and will return -1, and
+system call must be called.
+It will return -1;

 .Fn aio_error
 .Fn aio_error

-must be called to determine the actual value that would have been
-returned in
+must then be called to determine the actual value
+that would have been returned in

 .Va errno .
 .Pp
 .Bl -tag -width Er
 .Va errno .
 .Pp
 .Bl -tag -width Er

+.\" ==========

 .It Bq Er EBADF
 The
 .It Bq Er EBADF
 The

-.Fa iocb->aio_fildes
+.Fa aiocbp->aio_fildes

 argument
 is invalid.
 argument
 is invalid.

+.\" ==========

 .It Bq Er EINVAL
 The offset
 .It Bq Er EINVAL
 The offset

-.Fa iocb->aio_offset
+.Fa aiocbp->aio_offset

 is not valid, the priority specified by
 is not valid, the priority specified by

-.Fa iocb->aio_reqprio
+.Fa aiocbp->aio_reqprio

 is not a valid priority, or the number of bytes specified by
 is not a valid priority, or the number of bytes specified by

-.Fa iocb->aio_nbytes
+.Fa aiocbp->aio_nbytes

 is not valid.
 is not valid.

+.\" ==========

 .It Bq Er EOVERFLOW
 The file is a regular file,
 .It Bq Er EOVERFLOW
 The file is a regular file,

-.Fa iocb->aio_nbytes
+.Fa aiocbp->aio_nbytes

 is greater than zero, the starting offset in
 is greater than zero, the starting offset in

-.Fa iocb->aio_offset
+.Fa aiocbp->aio_offset

 is before the end of the file, but is at or beyond the
 is before the end of the file, but is at or beyond the

-.Fa iocb->aio_fildes
+.Fa aiocbp->aio_fildes

 offset maximum.
 .El
 .Pp
 offset maximum.
 .El
 .Pp


@@ -170,17 +180,20 @@ system call is either one of the error returns from the
 .Xr read 2
 system call, or one of:
 .Bl -tag -width Er
 .Xr read 2
 system call, or one of:
 .Bl -tag -width Er

+.\" ==========

 .It Bq Er EBADF
 The
 .It Bq Er EBADF
 The

-.Fa iocb->aio_fildes
+.Fa aiocbp->aio_fildes

 argument
 is invalid for reading.
 argument
 is invalid for reading.

+.\" ==========

 .It Bq Er ECANCELED
 The request was explicitly cancelled via a call to
 .Fn aio_cancel .
 .It Bq Er ECANCELED
 The request was explicitly cancelled via a call to
 .Fn aio_cancel .

+.\" ==========

 .It Bq Er EINVAL
 The offset
 .It Bq Er EINVAL
 The offset

-.Fa iocb->aio_offset
+.Fa aiocbp->aio_offset

 would be invalid.
 .El
 .Sh SEE ALSO
 would be invalid.
 .El
 .Sh SEE ALSO


@@ -207,5 +220,5 @@ manual page was written by
 .An Terry Lambert Aq terry@whistle.com .
 .Sh BUGS
 Invalid information in
 .An Terry Lambert Aq terry@whistle.com .
 .Sh BUGS
 Invalid information in

-.Fa iocb->_aiocb_private
+.Fa aiocbp->_aiocb_private

 may confuse the kernel.
 may confuse the kernel.