Folks-
I believe I've uncovered a bug when I try to do:
| Posted on 2005-08-11 21:02:11-07 by cmv |
| Bug in Channel.pm when stdin length is just right |
|
Folks-
I believe I've uncovered a bug when I try to do:
$ssh->cmd($cmd, $stdin);
...and the length of $stdin is just right.
I've narrowed it down to the process_outgoing() routine in Channel.pm, but didn't follow it any further. Here is the debug output (to which, I've added some additional debugging statements):
...
nimrod.ih.lucent.com: Login completed, opening dummy shell channel.
nimrod.ih.lucent.com: channel 0: new [client-session]
nimrod.ih.lucent.com: Requesting channel_open for channel 0.
nimrod.ih.lucent.com: channel 0: open confirm rwindow 0 rmax 32768
nimrod.ih.lucent.com: Got channel open confirmation, requesting shell.
nimrod.ih.lucent.com: Requesting service shell on channel 0.
nimrod.ih.lucent.com: channel 1: new [client-session]
nimrod.ih.lucent.com: Requesting channel_open for channel 1.
nimrod.ih.lucent.com: Entering interactive session.
nimrod.ih.lucent.com: Sending command: /opt/nwstools/bin/predecode
nimrod.ih.lucent.com: Requesting service exec on channel 1.
nimrod.ih.lucent.com: Checking stdin...
nimrod.ih.lucent.com: Draining stdin...
nimrod.ih.lucent.com: channel 1: drain_outgoing - length=32769
nimrod.ih.lucent.com: channel 1: process_outgoing - remote_window=0
nimrod.ih.lucent.com: channel 1: process_outgoing - remote_maxpacket=32768
nimrod.ih.lucent.com: channel 1: process_outgoing - length=32769 len=0
nimrod.ih.lucent.com: channel 1: process_outgoing - remote_window=0
nimrod.ih.lucent.com: channel 1: process_outgoing - remote_maxpacket=32768
nimrod.ih.lucent.com: channel 1: process_outgoing - length=32769 len=0
nimrod.ih.lucent.com: channel 1: process_outgoing - remote_window=131072
nimrod.ih.lucent.com: channel 1: process_outgoing - remote_maxpacket=32768
nimrod.ih.lucent.com: channel 1: process_outgoing - length=32769 len=32768
nimrod.ih.lucent.com: channel 1: process_outgoing - remote_window=98304
nimrod.ih.lucent.com: channel 1: process_outgoing - remote_maxpacket=32768
nimrod.ih.lucent.com: channel 1: process_outgoing - length=1 len=1
nimrod.ih.lucent.com: channel 1: window 12173 sent adjust 20595
As you can see, the length of the stdin string was just one over the remote_maxpacket. If the stdin string is under remote_maxpacket, it all works fine. You can also make it work fine with particular values over remote_maxpacket, but I haven't been able to pin down a pattern. Any help is appreciated. Thanks -Craig |
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