How to check if elf is statically linked?

[NobodyXu]

I want to check if an elf object is statically linked.

I've found Object::kind, however I'm not sure which variants in ObjectKind refers to a statically linked.

[philipc]

There's nothing in the unified API, and even ObjectKind isn't completely accurate.

For now, you'll need to use the lower level ELF APIs to read the ELF header flags and the program headers (e.g. check for PT_INTERP and/or PT_DYNAMIC, I don't know what the exact check is).

[NobodyXu]

Thanks for the quick reply!

I found that goblin supports getting program header https://docs.rs/goblin/latest/goblin/elf/struct.Elf.html and have PT_INTERP defined in the crate

[philipc]

goblin is certainly the easiest way to do it, but if all you want is to check if it is statically linked then it's doing a lot of parsing that you don't need. I don't know if that matters.

[NobodyXu]

For cargo-binstall, most of the time is spent on network and the elf shouldn't be too big, so I think it should be ok