[ih] 13 the unlucky number

[Carsten Bormann]

On 2020-08-11, at 01:58, Alejandro Acosta via Internet-history <internet-history at elists.isoc.org> wrote:
> 
>       010.rrr.rrr.rrr   ARPANET       ARPANET [17,1,VGC]

Off-topic, but I can’t read this in any other way than as an octal number.

$ ping 010.010.010.010
PING 010.010.010.010 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=119 time=6.35 ms
$ ping 134744072
PING 134744072 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=119 time=6.31 ms
$ ping 01002004010
PING 01002004010 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=119 time=6.31 ms
$ ping 0x8080808
PING 0x8080808 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=119 time=6.30 ms

Does anyone remember how this misfeature crept into the C library?
(I seem to remember seeing it all the way back to 4.2BSD.  
It no longer works with macOS, but still does on the Linuxes I tried.)

Grüße, Carsten