export variables while defining them

aristosv · 02-03-2020, 12:13 AM

right now I am using this script to read from file.txt and create a few variables.

Code:

while read value1 value2 value3
do
 some stuff
done < file.txt

Is there a way to also export these variables while reading them from file.txt without having to export them one by one?

Code:

export value1 value2 value3

Thanks

wpeckham · 02-03-2020, 06:05 AM

short answer: yes.

have you tried? Did you read the mam page on your shell?

BW-userx · 02-03-2020, 07:24 AM

ah no, I'd think not. If you have a semi automatic, or a fully automatic rifle. Pull the trigger. How many bullets can come out of the barrel of the rifle at the same time?

unless you have threads and program it as such to fire off "items" simultaneously.

but too, I have not read the mam page on your, or my shell. said to not conflict with wpeckham answer, only to point out basic logical progressions which strongly suggests nope.

one path, one in one out, two paths, spawn more than one, increase the path width, then put them out at the same time.

two or more threads one process controlling them.

teckk · 02-03-2020, 11:50 AM

Simple example:

Code:

cat file.txt
The big brown dog is sleeping

while read a b c; do
    export A="$a"
    export B="$b"
    export C="$c"
done < file.txt

for i in "$A" "$B" "$C"; do
    echo "$i"
done

The
big
brown dog is sleeping

export -p
declare -x A="The"
declare -x B="big"
declare -x C="brown dog is sleeping"