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The bash read command is very convenient for:
However, I'm having issues attempting to do both simultaneously.
For example:
#!/bin/bash while read item do echo Item: $item read -p "choose wisely: " choice echo You still have made a $choice. done < /tmp/item.list Rather than blocking and standing by for the user to enter a choice, bash is populating $choice with the next item in the item.list file.
Does bash support doing a read nested within a read loop?
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Nested loop definition That is to say, it is a loop that exists inside an outer loop. When you integrate nested loops in bash scripting, you are trying to make a command run inside another command. This is what it means: a bash nested for loop statement runs a command within another loop.
Bash read SyntaxThe read command takes the user input and splits the string into fields, assigning each new word to an argument. If there are fewer variables than words, read stores the remaining terms into the final variable. Specifying the argument names is optional.
The Readline library gives you a set of commands for manipulating the text as you type it in, allowing you to just fix your typo, and not forcing you to retype the majority of the line.
The simplest fix is to have the outer read read from a different file descriptor instead of standard input. In Bash, the -u option make that a little easier.
while read -u 3 item do # other stuff read -p "choose wisely: " choice # other stuff done 3< /tmp/item.list If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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