seti@home bash scrip question

sisob · 26-02-2002 7:47pm #1

i'm writing a bash script to let me download 3 seti@home work units at a time.

In the script that uploads the results I want to be able to run setiathome and check if it prints the line

Can't connect to server; will retry in an hour.

and if it does: restart the program after a minute.

i think a mixture of grep and if statements might do it but i cant work it out.

any help appreciated

moist · 27-02-2002 1:41am

How about...?

#!/bin/sh


OUTPUT=`/path/to/prog 2>&1`

CONTINUE="YES"

while [ "${CONTINUE}" = "YES" ] 
do
        if [  "${OUTPUT}" = "Can't connect to server; will retry in an hour." ]
        then    
                echo "Can't connect, sleeping...."
                sleep 60
                OUTPUT=`/path/to/prog 2>&1 `
        else    
                echo "Connected, exiting..."
                CONTINUE="NO"
        fi      
done

Depending on weather your program prints that error message on stderr or not
you may or may not have to use the " 2>&1 " bit (that just redirects stderr to stdout)
Its probably no harm to just leave it.

The test looks to see if the strings match _exactly_ so if your program
prints other messages, obviously the test will always fail.

In that case you could replace it with...

OUTPUT=`/path/to/prog 2>&1 | grep "Can't connect to server; will retry in an hour."`

seti@home bash scrip question

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