I'm almost 100% sure you - I use zsh, and I know you can do it there. I think there's nothing here that's zsh specific though:
function hosts {set -A reply $($HOME/bin/gethosts)}
compctl -K hosts -x 'c[-1,-l]' -u -- ping ssh telnet traceroute
This makes tab completion call my gethosts script whenever I try to tab as the first argument of ping, ssh, telent or traceroute. My gethosts script is pretty simple:
#!/usr/bin/perl -w
use strict;
my $HOME= $ENV{HOME};
open (HOSTS, "$HOME/.ssh/known_hosts") or exit;
my @hosts = <HOSTS>;
close HOSTS;
foreach my $line (@hosts) {
chomp($line);
my ($name) = split /\s+/, $line, 2;
my @names = split /,/, $name;
foreach (@names) {
print "$_ ";
}
}
So it returns an bash array (a list of space separated strings) of all the hostnames and ips in my .know_hosts file.
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