Created
November 5, 2014 20:55
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Changing an environment variable on every open shell on a remote machine
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| #this only works if your home dir is shared/mounted on every machine | |
| remote="remote.machine.name" | |
| user=$USER | |
| shell=bash | |
| #on login, see if this is an exceed session or not | |
| if [ -n "$XCONFIG_NAME" -a -n "$XSTART_NAME" ]; then | |
| #following is not totally necessary | |
| echo $DISPLAY > ~/.display | |
| #do something crazy, change the DISPLAY variable in every bash terminal | |
| # to the newly created exceed client, but do that on las-sw-01, not the | |
| # current box :P | |
| for pid in $(ssh $remote ps -u $user -U $user | awk "/$shell/"' { print $1 }'); do | |
| echo "pid: $pid" | |
| cat > ~/tmp/gdb_bash <<EOF | |
| attach $pid | |
| call putenv ("DISPLAY=$DISPLAY") | |
| detach | |
| quit | |
| EOF | |
| ssh $remote gdb -quiet -x ~/tmp/gdb_bash 2> /dev/null | |
| done | |
| rm -f ~/tmp/gdb_bash | |
| fi |
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Work is using exceed on demand for X11 forwarding (it's actually fairly nice for GUI stuff) but I like using mosh for shell stuff since it's lighter-weight. What this does is sets the DISPLAY variable in every bash shell open on a specific box (the one I'm using mosh+tmux to connect to) every time a new exceed session is started. This allows me to use mosh for shell stuff onto a box, and then when I run
diffuseorgvimor whatever on that shell it will X11 forward using exceed, which renders everything a lot faster than normal ssh X11 forwarding.