josch/mmdebstrap
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if /etc/machine-id exists, replace by an empty file

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Johannes 'josch' Schauer 2020-01-21 13:13:58 +01:00
parent 9eaacca795
commit bef4c890d8
Signed by: josch
GPG key ID: F2CBA5C78FBD83E1
1 changed files with 16 additions and 0 deletions
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mmdebstrap
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@ -2290,6 +2290,22 @@ sub setup {
unlink $path or error "cannot unlink $path: $!"; unlink $path or error "cannot unlink $path: $!";
} }
if (-e "$options->{root}/etc/machine-id") {
# from machine-id(5):
# For operating system images which are created once and used on
# multiple machines, for example for containers or in the cloud,
# /etc/machine-id should be an empty file in the generic file system
# image. An ID will be generated during boot and saved to this file if
# possible. Having an empty file in place is useful because it allows a
# temporary file to be bind-mounted over the real file, in case the
# image is used read-only.
unlink "$options->{root}/etc/machine-id"
or error "cannot unlink /etc/machine-id: $!";
open my $fh, '>', "$options->{root}/etc/machine-id"
or error "failed to open(): $!";
close $fh;
}
# remove any possible leftovers in /tmp but warn about it # remove any possible leftovers in /tmp but warn about it
if (-d "$options->{root}/tmp") { if (-d "$options->{root}/tmp") {
opendir(my $dh, "$options->{root}/tmp") opendir(my $dh, "$options->{root}/tmp")