Would /dev/urandom suffice?
Sure. But for portability's sake, the code should read 4 bytes from
/dev/random to seed srand() (fallback to (time XOR pid) or something
similar if /dev/random can't be opened), then call rand() to supply
however many bytes you want to use.
Dumb question time: Do we want to introduce a dependency on /dev/random?
Looks like most people have it now.
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