[ale] how do I - icon starts script starts 4 scripts

[Phil Turmel]

Hi Ron,

On 04/17/2013 09:35 PM, Ron Frazier (ALE) wrote:

> #!/bin/bash -eu
> # program to start all mining scripts
> cd ~/mining-scripts
> # commands to start the first miner
> mate-terminal --geometry=70x4+1800+100 -t "Miner 1" -e ./miner1 &
> # commands to start the second miner
> mate-terminal --geometry=70x4+1800+250 -t "Miner 2" -e ./miner2 &
> # commands to start the third miner
> mate-terminal --geometry=70x4+1800+400 -t "Miner 3" -e ./miner3 &
> # commands to start the fourth miner
> mate-terminal --geometry=70x4+1800+550 -t "Miner 4" -e ./miner4 &
> echo "Press enter to continue."
> read junk
> 
> I have to use mate-terminal to activate Mint's terminal emulator.  The
> --geometry option (mentioned by both you and Brian) sets the window size
> for each MINERx script as well as a location so they all stack up on the
> right of my monitor.  The -t option specifies a unique title for each
> window.  Each MINERx program is started with the "&" command (also
> mentioned by you and Brian) so the master script keeps on going without
> waiting.  For some reason, I had to put the read command at the end of
> the START-MINERS script or the sub scripts never kick off.  I have no
> idea why.

When a script ends, bash kills off any unfinished background tasks.  To
avoid this, the script must explicitly "disown" them.  However, the
background tasks that are still connected to the original terminal's
file descriptors might suicide on the loss of those pipes.

I would rewrite your script as follows:

#!/bin/bash -eu
# program to start all mining scripts
cd ~/mining-scripts

# commands to start the first miner
mate-terminal --geometry=70x4+1800+100 -t "Miner 1" -e ./miner1 &>/dev/null &

# commands to start the second miner
mate-terminal --geometry=70x4+1800+250 -t "Miner 2" -e ./miner2 &>/dev/null &

# commands to start the third miner
mate-terminal --geometry=70x4+1800+400 -t "Miner 3" -e ./miner3 &>/dev/null &

# commands to start the fourth miner
mate-terminal --geometry=70x4+1800+550 -t "Miner 4" -e ./miner4 &>/dev/null &

# Disconnect the background tasks from this script
disown -a



HTH,

Phil