Can't run umask

[Schweber]

Can't run umask

[Schweber]

Sorry, i just now understood your posts. I thought that umask is a coreutil or something like that. Thank you for pointing that out.

[fdncred]

It's apparently not in your path. I just ran it on macos and it works fine.

[nibon7]

umask is normally a built-in command provided by shell in linux

https://github.com/bminor/bash/blob/master/builtins/umask.def
https://git.busybox.net/busybox/tree/shell/ash.c#n14336

[fdncred]

if it's built into the shell binary, i could see how that would be a problem. you'd probably have to do bash -c umask maybe?

On MacOS, it's separate.

❯ which umask 
╭─#─┬command┬──────path──────┬───type───╮
│ 0 │ umask │ /usr/bin/umask │ external │
╰───┴───────┴────────────────┴──────────╯

[Schweber]

I guess it's related to Nixos. I've asked in the help forum there but haven't gotten an answer yet.

The strange thing is, that which umask fails in bash as well but i can still run umask in bash.

[fdncred]

The strange thing is, that which umask fails in bash as well but i can still run umask in bash.

This is because it's a built-in command like nibon7 said. In this context, built-in means all the code for it is built into the bash binary so it is not an external executable. This is why I said to try bash -c umask to see if you get a result. As long as bash is in your path, it should work.

[nibon7]

I guess it's related to Nixos. I've asked in the help forum there but haven't gotten an answer yet.

The strange thing is, that which umask fails in bash as well but i can still run umask in bash.

Seems like gnu which doesn't list built-in command, and you can use bash -c help to get built-in shell command list.

[liff]

It would be useful to have a umask command, though. Could/should this issue be considered a feature request?

[fdncred]

never used the command myself. it's also not in the uutils/coreutils crates.

[liff]

Probably the reason it isn’t in coreutils is that it cannot be implemented as an external command for the same reason as cd: it modifies the state of the running process. At least that’s the way it’s on Linux. No idea what /usr/bin/umask does on macOS 😅