instance method File::Stat#world_writable?

world_writable? -> Integer | nil[permalink][rdoc]

If stat is writable by others, returns an integer representing the file permission bits of stat. Returns nil otherwise. The meaning of the bits is platform dependent; on Unix systems, see stat(2).

m = File.stat("/tmp").world_writable?         # => 511
sprintf("%o", m)                              # => "777"

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