- Why does glibc check /etc/localtime every time localtime is called? Wild guess: so that new values of /etc/localtime are picked at runtime without restarting programs.
- Corollary: why does glibc not check /etc/localtime every time localtime is called, when TZ is set to :/etc/localtime? Arguably the reason above should still apply when TZ is set to a file name, shouldn't it?
- Why does glibc check /etc/localtime every time localtime is called? Wild guess: so that new values of /etc/localtime are picked at runtime without restarting programs.
- Corollary: why does glibc not check /etc/localtime every time localtime is called, when TZ is set to :/etc/localtime? Arguably the reason above should still apply when TZ is set to a file name, shouldn't it?