What's interesting is that setenv itself is protected by a lock so multiple parallel calls to setenv ought to work (I didn't actually check). getenv doesn't us

What's interesting is that setenv itself is protected by a lock so multiple parallel calls to setenv ought to work (I didn't actually check). getenv doesn't use a lock. https://sourceware.org/git/?p=glibc.git;a=blob;f=stdlib/setenv.c;h=e2164371ade896e9b3342754724e5ca381beb64e;hb=HEAD#l55 https://sourceware.org/git/?p=glibc.git;a=blob;f=stdlib/sete...