/proc/self/exec points to a wrong path

[Mic92]

Some programs i.e. the rust stdlib will use /proc/self/exe to get their own executable path i.e. to re-execute themself. In earlier versions of nix-ld, I was also using exec ld-linux.so having the same issue.

[wwilson]

This is totally a problem! We work around it in our own code that needs to read /proc/self/exe, but it's done in a pretty annoying way. Has nix-ld solved this issue? If so we would love to learn from you!

[Mic92]

The solution was to jump to the entry point of glibc. https://github.com/Mic92/nix-ld/blob/bf5aa84a713c31d95b4307e442e966d6c7fd7ae7/src/nix-ld.c#L445

An ld still needs to be executable as a program, which however is not hard to implement: https://github.com/Mic92/nix-ld/blob/bf5aa84a713c31d95b4307e442e966d6c7fd7ae7/src/nix-ld.c#L439

[Mic92]

However over all I would recommend what nix-ld-rs is doing: https://github.com/nix-community/nix-ld-rs
It also leaves no LD_LIBRARY_PATH pollution set in child processes.