Can someone explain why this would make the command wait forever? What is tee waiting for?
echo "test" | sudo tee newfile
What would be a scriptable workaround for such cases?
Edit: this command would not terminate in zsh. This works fine in bash tho.
I’m gonna take a couple of stabs in the dark.
According to this Stack Overflow answer using
teecan prevent the prompt from drawing which makes it appear that a script has not terminated. The answerer’s workaround is to put a very short sleep command after the tee command.If this is what happened to you maybe the reason the script works in bash but not in zsh is because you have different prompts configured in those two shells.
Another idea is to replace
teewithspongefrommoreutils. The difference is thatspongewaits for the end of stdin before it starts writing which can avoid problems in some situations.Can’t reproduce.
16:22:48:~/tmp$ echo foo | sudo tee newfile [sudo] Passwort für bleistift2: foo 16:23:02:~/tmp$ ls -l newfile -rw-r--r-- 1 root root 4 Feb 23 16:22 newfileI just switched over to bash and it worked lol. It just didn’t return for me in zsh…
My initial guess was that sudo would eat up the echo’d foo as the password. Maybe
sudoworks differently when invoked via zsh?sudodoes not prompt for password in my container. It just elevates the privileges straight away. Yeah, it’s hard to tell. Or test for that matter.
It works here in zsh, did you mistype the closing quote? Although that alters my prompt.
no way. I’m in /tmp for this one
echo 'test' | tee newfile tee: newfile: Permission denied test echo 'test' | sudo tee newfile #the prompt never returns when running this in zsh
Maybe it’s silently prompting you for your password?
Why does newfile need sudo to be created?
You need it to be owned by root?
yeah indeed. I’m setting up a container with these instructions for ROS2. There you’ll have to add a repository to the apt sources list.
ROS
Fly you fools!
Are you saying it waits forever, or you read somewhere it will wait forever and you want clarification?
Guessing that file doesn’t exist already is the problem, and you don’t even need to use tee in this example.
what I was saying was that
echo "text" | sudo tee newfilewould hang and never return and needs to be interrupted. I just noticed this does not happen in bash but I was testing in zsh.Guessing that file doesn’t exist already is the problem, and you don’t even need to use tee in this example.
you’ve missed the point here I’m afraid. But I’ll blame it on my for not explaining properly what I was intending to do.
ZSH is bash-compliant, but will not always behave like bash in all situations.
Add
sh -cbeforeechoand see if that worksyep. that did it. I had to wrap the entire thing in quotes though
sh -c "echo 'test' | sudo tee newfile"
