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+1 for underlying function. To add, this function will cause IP parsing to fail if a valid byte (eg .88) is zero-padded, since 8 is not a valid number in octal.
– March Ho
Commented Dec 29, 2014 at 13:34
In Windows XP (and before that) the function WILL accept invalid octal numbers and still attempts to convert them. This can lead to very non-obvious behavior. As of Vista invalid numbers are treated as domain names and Windows will attempt to do a DNS lookup for these. Which is pretty odd behavior too, but that will at least not cause any problems.
– Tonny
Commented Dec 29, 2014 at 16:04
@tonny that's because POSIX inet_addr() returns -1 for invalid values, which loops around to 255. The newer routine, as mentioned in the Linux man page, has better error handling.
– cde
Commented Dec 29, 2014 at 16:48
@cde I never bothered to delve that deep into the mechanics of inet_addr(). I'll take your word for it :-)
– Tonny
Commented Dec 29, 2014 at 19:30

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