open("/dev/ttyS1", O_LARGEFILE) blocks

[Bernd Petrovitsch <bernd@gams.at>]

Hi all!

Is is normal/correct/intended that an open() of /dev/ttyS1 blocks?
----  snip  ----
{81}strace ./test-open /dev/ttyS0
[...]
open("/dev/ttyS0", O_RDONLY|O_NONBLOCK) = 3
close(3)                                = 0
open("/dev/ttyS0", O_RDONLY|O_NONBLOCK|O_LARGEFILE) = 3
close(3)                                = 0
open("/dev/ttyS0", O_RDONLY|O_LARGEFILE) = 3
close(3)                                = 0
_exit(0)                                = ?
{82}strace ./test-open /dev/ttyS1
[...]
open("/dev/ttyS1", O_RDONLY|O_NONBLOCK) = 3
close(3)                                = 0
open("/dev/ttyS1", O_RDONLY|O_NONBLOCK|O_LARGEFILE) = 3
close(3)                                = 0
open("/dev/ttyS1", O_RDONLY|O_LARGEFILE <unfinished ...>
{83}lsof /dev/ttyS0
{84}lsof /dev/ttyS1
{85}uname -a
Linux xxx 2.4.20-pre10aa1 #6 Fri Oct 11 13:41:20 CEST 2002 i686 unknown
----  snip  ----

The second one was terminated with a Ctrl-C.
Nothing was connected to none of the ports.
Is there a reason that an open() on /dev/ttyS0 works and blocks
on /dev/ttyS1?

	Bernd

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Bernd Petrovitsch                              Email : bernd@gams.at
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