[TUHS] [COFF] Pondering the hosts file

Henry Bent henry.r.bent at gmail.com
Fri Mar 12 04:18:20 AEST 2021


While this is true wrt the history of FreeBSD/Unix, I'm almost positive
> that BSD didn't invent it. I'm pretty sure it was picked up from the
> existing host file that was published by sri-nic.arpa before DNS.
>
> Warner
>

The CSRG history doesn't seem to have saved the full SCCS history of the
hosts manpage, but it must have appeared sometime around the addition of
ARP support to 4.1BSD - it's not in the 4.1C sources without ARP, but it is
in the sources with it.  That version does indeed mention its origins:

HOSTS(5)                      File Formats Manual
HOSTS(5)



NAME
       hosts - host name data base

DESCRIPTION
       The  hosts  file  contains information regarding the known hosts on
the
       DARPA Internet.  For each host a single line should be present with
the
       following information:

       official host name
       Internet address
       aliases

       Items  are  separated by any number of blanks and/or tab characters.
 A
       ``#'' indicates the beginning of a comment; characters up to the end
of
       the  line  are not interpreted by routines which search the file.
This
       file is normally created from the official host data base maintained
at
       the  Network Information Control Center (NIC), though local changes
may
       be required to bring it up to date regarding unofficial aliases
 and/or
       unknown hosts.

       Network  addresses are specified in the conventional ``.'' notation
us-
       ing the inet_addr() routine from the Internet address manipulation
 li-
       brary,  inet(3).   Host names may contain any printable character
other
       than a field delimiter, newline, or comment character.

FILES
       /etc/hosts

SEE ALSO
       gethostent(3N)

BUGS
       A name server should be used instead of a static file.   A  binary
 in-
       dexed file format should be available for fast access.



                                15 January 1983
HOSTS(5)

-Henry
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