CODEWITHSUNDEEP
bashunixsshubuntu-12.04
Aaron Hancock
Aaron Hancock

Reputation: 53

Bash script "read" not pausing for user input when executed from SSH shell

I'm new to Bash scripting, so please be gentle.

I'm connected to a Ubuntu server via SSH (PuTTY) and when I run this command, I expect the bash script that downloads and executes to allow user input and then echo that input. It seems to just write out the echo label for the input request and terminate.

wget -O - https://raw.github.com/aaronhancock/pub/master/bash/readtest.sh | bash

Any clue what I might be doing wrong?

UPDATE: This bash command does exactly what I wanted

bash <(wget -q -O - https://raw.github.com/aaronhancock/pub/master/bash/readtest.sh)

Upvotes: 3

Views: 1403

Answers (3)

Aaron Hancock
Aaron Hancock

Reputation: 53

I found this also works and helps keep the data in the current scope.

eval "wget -q -O - https://raw.github.com/aaronhancock/pub/master/bash/readtest.sh"

Upvotes: 0

bmk
bmk

Reputation: 14137

Jonathan already mentioned: bash takes its stdin from the pipe. And therefore you cannot pipe the script into bash when you want to interactively input something. But you could use the process substitution feature of bash (assumed your login shell is a bash):

bash <(wget -O - https://raw.github.com/aaronhancock/pub/master/bash/readtest.sh)

Upvotes: 1

Jonathan
Jonathan

Reputation: 1075

Bash is taking stdin from the pipe, not from the terminal. So you can't pipe a script to bash and still use the "read" command for user input.

Notice that you have the same problem if you save the script to a local file and pipe it to bash:

less readtest.sh | bash

Upvotes: 0

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