openssh unix dev - Feb 2012 - Having issues with remote command execution - ssh -t host 'sudo command'

I've been trying to find an answer on other sites however I could not
resolve my problem.

spec:
os: ubuntu 10.0, OpenSSH_5.5p1 Debian-4ubuntu4, OpenSSL 0.9.8o

problem:
When trying to restart deamons on remote pcs having the same specs,
sometimes deamons are executed succesfully and sometimes not. I am using
the following command:

ssh -t -vvv "$host" 'sudo /usr/local/sbin/program'

which asks me for a pass and then continues. From the debug log I can see
that the difference from a successfull and unsuscesful run depends on
sequence of the following code blocks. If successful first runs code block1
and then block2, otherwise the opposite.

code1:
debug2: channel 0: rcvd eof
debug2: channel 0: output open -> drain
debug2: channel 0: obuf empty
debug2: channel 0: close_write
debug2: channel 0: output drain -> closed

code2:
debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
debug1: client_input_channel_req: channel 0 rtype eow at openssh.com reply 0
debug2: channel 0: rcvd eow
debug2: channel 0: close_read
debug2: channel 0: input open -> closed

Any help appreciated..

thanks

Merto Mertek wrote:
> spec:
> os: ubuntu 10.0, OpenSSH_5.5p1 Debian-4ubuntu4, OpenSSL 0.9.8o
> 
> problem:
> When trying to restart deamons on remote pcs having the same specs,
> sometimes deamons are executed succesfully and sometimes not.
The problem happens when stdin, stdout and stderr are not all closed
by the daemon. This is very well known.

> I am using the following command:
> 
> ssh -t -vvv "$host" 'sudo /usr/local/sbin/program'
> 
> which asks me for a pass and then continues.
Instead you should let the ubuntu service manager (upstartd for now)
manage your services, and use the commands put in place by the
service manager for controlling your services.

Avoid starting things manually. Incidentally, if you do make your
services run under the service manager then you will also never have
the stdio problem.


//Peter