Message-ID: <BAY125-F4059F2BD981CF64282FE9EB5320@phx.gbl>
From: "Karl M" <karlm30 AT hotmail DOT com>
To: timb AT cdvinc DOT com, cygwin AT cygwin DOT com
Subject: Re: ssh-add cannot connect to authentication agent
Date: Fri, 18 May 2007 10:26:08 -0700
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>From: Tim Beuman Subject: Re: ssh-add cannot connect to authentication 
>agent
>Date: Fri, 18 May 2007 09:11:00 -0700
>
>Haven't been able to nail it down that specific. I ended up modifying 
>ssh-agent to run as a service under the SYSTEM account rather than as a 
>background process under the user-account. It worked fine that way, even 
>with McAfee but like I said, it required a modification of ssh-agent 
>itself.
>
>Tim
>
Hi All...

I've been using ssh-agent as a service for years, with no modifications. I 
started doing it because keychain was slow to start up and lost the keys on 
logout, whereas ssh-agent as a service keeps the keys until a reboot.

Attached are two scripts secret-agent-service and 
secret-agent-service-install are the scripts used for running ssh-agent as a 
service (one for each user that wants it). The sendchenv makes sure that the 
environment variables are up to date (if the service starts after the user 
logs in...have to love Microsoft).

HTH,

...Karl

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#!/bin/bash
# Launch the ssh-agent from a service so it survives logoff.

# When the service stops, kill the ssh-agent.
trap "ssh-agent -k;
  exit 0" TERM

# Clean up old files that may be left behind after a crash.
#   The file permissions make this safe to do in a multi-user
#   environment, but "/tmp" must be local to this host.
rm -rf /tmp/ssh-*

# Launch the ssh-agent.
eval $(ssh-agent)

# Provide the ssh-agent socket ID via the registry and broadcast
#   the change in case the user is logged before we finish.
#   Do not provide the ssh-agent PID to minimize the risk of
#   accidentally killing the ssh-agent.
regtool -s set /HKEY_CURRENT_USER/Environment/SSH_AUTH_SOCK $SSH_AUTH_SOCK
regtool remove /HKEY_CURRENT_USER/Environment/SSH_AGENT_PID
sendchenv

# Wait quietly until the service is stopped.
while true; do
  sleep 24h &
  wait
done


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#!/bin/bash
# secret-agent-service-install service-name user-name

if [ "~$1" = "~" ]; then
  echo A service name is required.
  exit 1
fi

if [ "~$2" = "~" ]; then
  echo A user name is required.
  exit 1
fi

echo Uninstalling the secret-agent service, $1.
cygrunsrv --remove $1

echo Adding the \"Log on as a Service\" right for $2.
editrights -a SeServiceLogonRight -u $2

echo Installing the secret-agent service, $1.
cygrunsrv --install $1 \
  --args '/bin/secret-agent-service' \
  --disp "Secret Agent $2" \
  --desc "Creates an ssh-agent process for $2." \
  --path '/bin/bash' \
  --shutdown \
  --user "$2"

echo Starting the secret-agent service, $1.
cygrunsrv --start $1


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// Notify all windows that environment variables may have changed.

#include <windows.h>

int main()
{
  DWORD dwReturnValue;

  if (SendMessageTimeout(HWND_BROADCAST, WM_SETTINGCHANGE, 0,
      (LPARAM) "Environment", SMTO_ABORTIFHUNG, 5000, &dwReturnValue))
    return 0;
  else
    return 1;
}


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