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    You are wrong about the 777 vs 0777. Both are octal (decimal makes no sense anyway in this case), but in four-character form, the first digit sets the special bits (sticky & setuid). Commented Feb 10, 2015 at 14:01
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    @orion Occasionally it actually is true, e.g. in a C-like code chmod(777) would actually be the equivalent of running chmod 1411 (i.e. the chmod command with argument 1411). Commented Feb 10, 2015 at 17:39
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    ... which in the case of the syscall (or its wrapper) and the binary bearing the same name can be a bit confusing. Commented Feb 10, 2015 at 17:46
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    Python Master Race solved this backwards problem by banning all "numbers" that start with 0, forcing the user to be explicit if they want anything other than decimal, e.g. hex: 0x1FF, binary: 0b111111111 or octal: 0o777. PYTHON POWER Commented Feb 11, 2015 at 3:42
  • Picture source? Commented Jun 12, 2017 at 23:04