aio: change to use unix io, not stdio

This changes especially makes buffered I/O work
with non-blocking channels.

- separate read and write buffering
- support for timeout on blocking read
- read/write on same channel in event loop with buffering
- read buffer is the same across read, gets, copyto
- autoflush non-blocking writes via event loop
- copyto can now copy to any filehandle-like command
- add some copyto tests

Signed-off-by: Steve Bennett <steveb@workware.net.au>

1 files changed, 4 insertions, 4 deletions

diff --git a/tests/runall.tcl b/tests/runall.tcl
index 96a56a9..5c9aa8b 100644
--- a/tests/runall.tcl
+++ b/tests/runall.tcl
@@ -47,11 +47,11 @@ if {[info commands interp] eq ""} {
 				puts [format "%16s:   --- error ($msg)" $script]
 				incr total(fail)
 			} elseif {[info return $opts(-code)] eq "exit"} {
-				# if the test explicitly called exit 99,
+				# if the test explicitly called exit 98 or 99,
 				# it must be from a child process via os.fork, so
-				# silently exit
-				if {$msg eq "99"} {
-					exit 0
+				# silently exit with that return code
+				if {$msg in {98 99}} {
+					exit $msg
 				}
 			}