zer0stimulus questions

• Linux: how to mark a file descriptor as not inheritable on fork? [duplicate]
• Android: Possible to preserve data when upgrading app?
• kernel: how to find all threads from a process's task_struct?
• Java: Is member initialization outside of constructor always guaranteed to be invoked?
• mmap(): what happens if underlying file changes (shrinks)?
• xslt: How to ignore apply-template elements for which there are no matches?
• C: What does this macro mean?
• Android: Is each UI thread in an Activity a separate threads?
• django: How to hook save button for Model admin?
• Android: Possible for background thread to block until UI thread finishes operation?

zer0stimulus answers