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Comments on An alternative to pacman sudo nag?

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An alternative to pacman sudo nag?

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Some pacman functions require sudo. When I forget the sudo, you get:

error: you cannot perform this operation unless you are root.

I then have to press the keys: up, home, s, u, d, o, space, enter to rerun with sudo. I find this irritating and it breaks my flow.

Is there a better solution here? If sudo is required for an operation, it should be run with sudo, rather than erroring out. In most situations where sudo is dangerous, it would prompt for a password anyway, so there's very little danger here. I have almost never ran pacman with sudo when I didn't mean to, but I have forgotten the sudo many times.

I could alias pacman to sudo pacman. However, some operations don't need sudo, like -Q. That alias would result in needless password prompts, which I also want to avoid.

How can I make pacman automatically use sudo when needed? I'd also like it to participate in sudo caching, so for example I don't want a situation like systemctl which automatically asks for sudo password when needed, but fails to remember it.

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1 comment thread

Command repetition with modifications (2 comments)
Command repetition with modifications
Canina‭ wrote 4 months ago

This isn't an answer specific to pacman, but if you're using bash, you can use command repetition with a prefix (or suffix).

For example:

$ ls /root
ls: cannot open directory '/root': Permission denied
$ sudo !!
sudo ls /root
[sudo] password for <user>: 
<list of files in /root>
$

!! (which is a synonym for !-1) expands to the immediately preceding command as executed including any parameters. See bash(1) under "event designators" for other variations on the theme.

mr Tsjolder‭ wrote 4 months ago

This feature is known as history expansion and is probably what the OP is looking for. Originally introduced in csh, and introduced in bash, but also seems to work in sh and zsh.