#1930 unixNotfy.test needs writable .

[Don Porter]

See Tcl Bug 575817.

unixNotfy.test fails:

==== unixNotfy-1.1 Tcl_DeleteFileHandler FAILED
==== Contents of test case:

catch {vwait x}
set f [open foo w]
fileevent $f writable {set x 1}
vwait x
close $f
list [catch {vwait x} msg] $msg

---- Result was:
couldn't open "foo": permission denied
---- Result should have been (exact matching):
1 {can't wait for variable "x": would wait forever}
---- Test generated error; Return code was: 1
---- Return code should have been one of: 0 2
==== unixNotfy-1.1 FAILED

==== unixNotfy-1.2 Tcl_DeleteFileHandler FAILED
==== Contents of test case:

catch {vwait x}
set f1 [open foo w]
set f2 [open foo2 w]
fileevent $f1 writable {set x 1}
fileevent $f2 writable {set y 1}
vwait x
close $f1
vwait y
close $f2
list [catch {vwait x} msg] $msg

---- Result was:
couldn't open "foo": permission denied
---- Result should have been (exact matching):
1 {can't wait for variable "x": would wait forever}
---- Test generated error; Return code was: 1
---- Return code should have been one of: 0 2
==== unixNotfy-1.2 FAILED