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marsadm: try to correct dottet hostname when possible

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Thomas Schoebel-Theuer 2022-03-14 22:36:17 +01:00 committed by Thomas Schoebel-Theuer
parent 1876eb70e3
commit fe31a954b2
1 changed files with 11 additions and 1 deletions
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12
userspace/marsadm
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@ -239,7 +239,9 @@ sub get_checked_utsname {
$hostname = <$fh>;
close($fh);
chomp $hostname;
} else {
}
# Some distros like OpenSUSE allow differences between /etc/hostname and other sources
if (!$hostname || $hostname =~ m/\./) {
$etc_hostname = "/bin/hostname";
unless (-x $etc_hostname) {
$etc_hostname = "/usr/bin/hostname";
@ -259,6 +261,14 @@ sub get_checked_utsname {
unless ($uname) {
die "CRITICAL RISK: cannot determine network node name via 'uname -n'\n";
}
if ($uname ne $hostname) {
# try to shorten only the hostname
my $oldname = $hostname;
if ($hostname =~ s/\..*$//) {
warn "WARNING: I am now shortening the FQDN-like hostname '$oldname' from $etc_hostname down to '$hostname', but you are running a RISK.\n";
warn "WARNING: Please read mars-user-manual.pdf about the SERIOUS RISKS from FQDN-like hostnames\n";
}
}
if ($uname ne $hostname) {
die "CRITICAL RISK: the utsname from 'uname -n' is '$uname', DIFFERING from $etc_hostname '$hostname'\n";
}