ld_preload is a library meant for easily creating LD_PRELOAD constructors and destructors, like one would use __attribute__((constructor)) and __attribute__((destructor)) for in CXX with GCC. This has only been tested to work with GNU/Linux.
In order to use the library, use the macros:
ld_preload_init!({
println!("Hello, Ferris!");
});
ld_preload_deinit!({
println!("Goodbye, Ferris!");
});Then you need to set lib.crate-type to ["cdylib"] to compile it.
To use it, you may do something along these lines: LD_PRELOAD=./target/release/libLIBNAME.so echo "I love Ferris!"
It may also be useful to set profile.dev.panic and profile.release.panic to "abort".