Bash: "read" input while inside a while/read loop
Posted: Mon Oct 12, 2015 2:54 pm
[PROBLEM]
Usually, in bash the command "read" is used for "press any key to continue" scenarios:
This conflicts however, when calling it inside a while loop that uses "read" to e.g. iterate through a file:
The "read" used to wait for a key, literally "eats up" every 2nd line of the input file, because the stdin is now colliding between 2 different inputs.
[SOLUTION]
Use a for loop with "cat" instead of while/read:
NOTE: Versions that use a different pipe than stdin can be found in the site, linked below.
Links:
Usually, in bash the command "read" is used for "press any key to continue" scenarios:
Code: Select all
read -p "press any key..."Code: Select all
while read LINE; do
...
read -p "press any key"
done < $FILE[SOLUTION]
Use a for loop with "cat" instead of while/read:
Code: Select all
for LINE in $(cat $FILE); do
...
read -p "press any key"
done
NOTE: Versions that use a different pipe than stdin can be found in the site, linked below.
Links: