I used to do this:
declare -g var='value'
. ~script.sh sub
and my var was available to read and modify from within my sub.
Now I have a binary instead of script.sh and I want the same functionality.
Of course, now I cannot do . ~/script.bin sub because bash 'cannot execute binary file'
Instead I have to :
declare -g var='value'
~/script.bin sub
How do I get ~/script.bin sub to read/modify my var?
I tried also:
declare -gx var='value' and export var='value' but no cookie.
I tried with shared memory and it maybe a good and easy option.
In my ~/script.bin sub I now have:
sub() {
shmvar="/dev/shm/var"
echo "sub var: " && cat "${shmvar}" # show the imported var
echo "new value" > "$shmvar" # modify the var
return 0
}
whilst in the main script I have:
var='old value'
shmvar="/dev/shm/colBlack" # shm var address
echo "$var" > "$shmvar" # populate shmvar with var
~/scirpt.bin sub # call my binary sub
echo "new var: " && cat "${shmvar}" # check the modified var
output:
sub var:
old value
new var:
new value
var=$(script.bin bin).