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don't overwrite existing files in setup

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Johannes Schauer Marin Rodrigues 2022-01-07 14:44:01 +01:00
parent 1b0f7f1138
commit 0383efc554
Signed by untrusted user: josch
GPG key ID: F2CBA5C78FBD83E1
1 changed files with 23 additions and 15 deletions
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38
mmdebstrap
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@ -1663,7 +1663,7 @@ sub run_setup() {
# from inside the chroot. # from inside the chroot.
# The config filename is chosen such that any settings in it will be # The config filename is chosen such that any settings in it will be
# overridden by what the user specified with --aptopt. # overridden by what the user specified with --aptopt.
{ if (!-e "$options->{root}/etc/apt/apt.conf.d/00mmdebstrap") {
open my $fh, '>', "$options->{root}/etc/apt/apt.conf.d/00mmdebstrap" open my $fh, '>', "$options->{root}/etc/apt/apt.conf.d/00mmdebstrap"
or error "cannot open /etc/apt/apt.conf.d/00mmdebstrap: $!"; or error "cannot open /etc/apt/apt.conf.d/00mmdebstrap: $!";
print $fh "Apt::Install-Recommends false;\n"; print $fh "Apt::Install-Recommends false;\n";
@ -1672,7 +1672,7 @@ sub run_setup() {
} }
# apt-get update requires this # apt-get update requires this
{ if (!-e "$options->{root}/var/lib/dpkg/status") {
open my $fh, '>', "$options->{root}/var/lib/dpkg/status" open my $fh, '>', "$options->{root}/var/lib/dpkg/status"
or error "failed to open(): $!"; or error "failed to open(): $!";
close $fh; close $fh;
@ -1684,9 +1684,11 @@ sub run_setup() {
# architecture outside the chroot. # architecture outside the chroot.
chomp(my $hostarch = `dpkg --print-architecture`); chomp(my $hostarch = `dpkg --print-architecture`);
if ( if (
scalar @{ $options->{foreignarchs} } > 0 (!-e "$options->{root}/var/lib/dpkg/arch")
or ( $options->{mode} eq 'chrootless' and (
and $hostarch ne $options->{nativearch}) scalar @{ $options->{foreignarchs} } > 0
or ( $options->{mode} eq 'chrootless'
and $hostarch ne $options->{nativearch}))
) { ) {
open my $fh, '>', "$options->{root}/var/lib/dpkg/arch" open my $fh, '>', "$options->{root}/var/lib/dpkg/arch"
or error "cannot open /var/lib/dpkg/arch: $!"; or error "cannot open /var/lib/dpkg/arch: $!";
@ -1697,7 +1699,8 @@ sub run_setup() {
close $fh; close $fh;
} }
if (scalar @{ $options->{aptopts} } > 0) { if (scalar @{ $options->{aptopts} } > 0
and (!-e "$options->{root}/etc/apt/apt.conf.d/99mmdebstrap")) {
open my $fh, '>', "$options->{root}/etc/apt/apt.conf.d/99mmdebstrap" open my $fh, '>', "$options->{root}/etc/apt/apt.conf.d/99mmdebstrap"
or error "cannot open /etc/apt/apt.conf.d/99mmdebstrap: $!"; or error "cannot open /etc/apt/apt.conf.d/99mmdebstrap: $!";
foreach my $opt (@{ $options->{aptopts} }) { foreach my $opt (@{ $options->{aptopts} }) {
@ -1723,7 +1726,8 @@ sub run_setup() {
} }
} }
if (scalar @{ $options->{dpkgopts} } > 0) { if (scalar @{ $options->{dpkgopts} } > 0
and (!-e "$options->{root}/etc/dpkg/dpkg.cfg.d/99mmdebstrap")) {
# FIXME: in chrootless mode, dpkg will only read the configuration # FIXME: in chrootless mode, dpkg will only read the configuration
# from the host -- see #808203 # from the host -- see #808203
if ($options->{mode} eq 'chrootless') { if ($options->{mode} eq 'chrootless') {
@ -1753,7 +1757,7 @@ sub run_setup() {
} }
} }
{ if (!-e "$options->{root}/etc/fstab") {
open my $fh, '>', "$options->{root}/etc/fstab" open my $fh, '>', "$options->{root}/etc/fstab"
or error "cannot open fstab: $!"; or error "cannot open fstab: $!";
print $fh "# UNCONFIGURED FSTAB FOR BASE SYSTEM\n"; print $fh "# UNCONFIGURED FSTAB FOR BASE SYSTEM\n";
@ -1793,9 +1797,11 @@ sub run_setup() {
$fname .= 'main.sources'; $fname .= 'main.sources';
} }
} }
open my $fh, '>', "$fname" or error "cannot open $fname: $!"; if (!-e $fname) {
print $fh $firstentry->{content}; open my $fh, '>', "$fname" or error "cannot open $fname: $!";
close $fh; print $fh $firstentry->{content};
close $fh;
}
# everything else goes into /etc/apt/sources.list.d/ # everything else goes into /etc/apt/sources.list.d/
for (my $i = 1 ; $i < scalar @{ $options->{sourceslists} } ; $i++) { for (my $i = 1 ; $i < scalar @{ $options->{sourceslists} } ; $i++) {
my $entry = $options->{sourceslists}->[$i]; my $entry = $options->{sourceslists}->[$i];
@ -1822,15 +1828,17 @@ sub run_setup() {
error "invalid type: $entry->{type}"; error "invalid type: $entry->{type}";
} }
} }
open my $fh, '>', "$fname" or error "cannot open $fname: $!"; if (!-e $fname) {
print $fh $entry->{content}; open my $fh, '>', "$fname" or error "cannot open $fname: $!";
close $fh; print $fh $entry->{content};
close $fh;
}
} }
} }
# allow network access from within # allow network access from within
foreach my $file ("/etc/resolv.conf", "/etc/hostname") { foreach my $file ("/etc/resolv.conf", "/etc/hostname") {
if (-e $file) { if (-e $file && !-e "$options->{root}/$file") {
# this will create a new file with 644 permissions and copy # this will create a new file with 644 permissions and copy
# contents only even if $file was a symlink # contents only even if $file was a symlink
copy($file, "$options->{root}/$file") copy($file, "$options->{root}/$file")