} {0o600 {line 1}}
test io-40.3 {POSIX open access modes: CREAT} {unix umask} {
    # This test only works if your umask is 2, like ouster's.
    file delete $path(test3)
    set f [open $path(test3) {WRONLY CREAT}]
    close $f
    file stat $path(test3) stats
    format "%#o" [expr $stats(mode)&0o777]
} [format %#4o [expr {0o666 & ~ $umaskValue}]]
    format "0o%03o" [expr $stats(mode)&0o777]
} [format "0o%03o" [expr {0o666 & ~ $umaskValue}]]
test io-40.4 {POSIX open access modes: CREAT} {
    file delete $path(test3)
    set f [open $path(test3) w]
    fconfigure $f -eofchar {}
    puts $f xyzzy
    close $f
    set f [open $path(test3) {WRONLY CREAT}]