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Oct 19, 2009, 12:16 PM
Post #3 of 7
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[Bug 1424] Cannot signal a process over a channel (rfc 4254, section 6.9)
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https://bugzilla.mindrot.org/show_bug.cgi?id=1424
--- Comment #12 from Salvador Fandiņo <sfandino [at] yahoo> 2009-10-20 06:16:51 EST ---
Created an attachment (id=1700)
--> (https://bugzilla.mindrot.org/attachment.cgi?id=1700)
extend the signals patch to accept them over the mux socket
Note, Darren Tucker patch 1699 has to be applied first!
This patch adds support for two new -O commands: ps and kill
- ps will list the PIDs of slave ssh processes
- kill allows to send signals
It also adds support to sshd to accept signals by number.
Sample session:
===============
$ ./ssh -S /tmp/mux -M localhost -f perl ~/g/my-ssh/tellsignal.pl
$ ./ssh -S /tmp/mux localhost -O ps
24140
$ ./ssh -S /tmp/mux localhost -O kill HUP 24140
Signal request sent.
signal HUP received
$ ./ssh -S /tmp/mux localhost -O kill 15 24140
Signal request sent.
signal TERM received
$ ./ssh -S /tmp/mux localhost -O kill KILL 24140
Signal request sent.
$
Some notes:
===========
* A new field "tag" is added to Channel, it is used as the session
logical name. The current client implementation (muxclient) uses the
process PID as the tag.
* muxclient() now gets the arguments remaining in argv after getopt
processing so it can use them for the -O commands (currently, just
"kill"). I am not completely sure about this because it can be a bit
counterintuitive when the "-O cmd" part is used before the hostname:
$ ssh -S /tmp/mux -O kill localhost TERM 24140
Bye,
- Salva
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