The env is technically still kind of a file on linux at least (through /proc). Sometimes I feel like stdin or an unlinked memory mapped file might be the best

The env is technically still kind of a file on linux at least (through /proc). Sometimes I feel like stdin or an unlinked memory mapped file might be the best location for this stuff. Wish Linux had a cloexec+1 option, where an fd is closed after two execs, so you can set up a child process for success.