this post was submitted on 15 Nov 2023
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submitted 2 years ago by [email protected] to c/[email protected]
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[–] [email protected] 21 points 2 years ago* (last edited 2 years ago) (2 children)

Still don't do this. If you use bash specific syntax with this head, that's a bashism and causes issues with people using zsh for example. Or with Debian/*buntu, who use dash as init shell.

Just use #!/bin/bash or #!/usr/bin/env bash if you're funny.

[–] [email protected] 8 points 2 years ago (1 children)

#!/bin/bash doesn't work on NixOS since bash is in the nix store somewhere, #!/usr/bin/env bash resolves the correct location regardless of where bash is

[–] [email protected] 3 points 2 years ago* (last edited 2 years ago) (3 children)

Are there any distos with /usr/bin/env in a different spot? I still believe that's the best approach for getting bash.

[–] [email protected] 6 points 2 years ago (1 children)

All posix-compliant distros need /usr/bin/env

[–] [email protected] 5 points 2 years ago* (last edited 2 years ago) (1 children)

I do think a simple symlink is superior to a tool parsing stuff. A shame POSIX choose this approach.

Still the issue that a posix shell can be on a non-posix system and vice versa. And certificates versus used practice. Btw, isn't there only one posix certified Linux distro? Was it Suse?

[–] [email protected] 2 points 2 years ago

Posix certification is dumb but posix compliance is nice to ensure some level of compatibility.

Symlinks would be pretty bad in the case of nixos. Wouldn't fit at all

[–] [email protected] 2 points 2 years ago

My own. I use arch btw

[–] [email protected] 0 points 2 years ago (1 children)

/bin/bash won't work on every system for example NixOS some other systems may have bash in /usr/bin or elsewhere

[–] [email protected] 1 points 2 years ago (1 children)

NixOS didn't do /usr merge?

[–] [email protected] 1 points 2 years ago

Binaries are not in /usr/bin or /bin except for /bin/sh and /usr/bin/env. Programs should not assume fixed paths for binaries and instead look for them in $PATH.