1 files changed, 24 insertions, 0 deletions
diff --git a/sys/fio/aread.x b/sys/fio/aread.x
new file mode 100644
index 00000000..a57c92c9
--- /dev/null
+++ b/sys/fio/aread.x
@@ -0,0 +1,24 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<mach.h>
+
+# AREAD -- Asychronous block read from a binary file.  Reads can only
+# start at a character offset which is an integral multiple of the file
+# block size.
+
+procedure aread (fd, buffer, maxchars, char_offset)
+
+int	fd			# FIO file descriptor
+int	maxchars		# maximum number of chars to be read
+char	buffer[ARB]		# buffer into which data is to be read
+long	char_offset		# one-indexed char offset in file
+
+int	maxbytes
+long	byte_offset
+
+begin
+	maxbytes = maxchars * SZB_CHAR
+	byte_offset = (char_offset-1) * SZB_CHAR + 1
+
+	call areadb (fd, buffer, maxbytes, byte_offset)
+end