josch/mmdebstrap
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output tarball if output is named pipe or character special

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This commit is contained in:
Johannes 'josch' Schauer 2020-03-22 14:10:06 +01:00
parent 412039bd66
commit 323a353548
Signed by: josch
GPG key ID: F2CBA5C78FBD83E1
1 changed files with 30 additions and 25 deletions
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mmdebstrap
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@ -3658,9 +3658,13 @@ sub main() {
# figure out whether a tarball has to be created in the end
$options->{maketar} = 0;
$options->{makesqfs} = 0;
if ( defined $tar_compressor
if (
defined $tar_compressor
or $options->{target} =~ /\.tar$/
or $options->{target} eq '-') {
or $options->{target} eq '-'
or -p $options->{target} # named pipe (fifo)
or -c $options->{target} # character special like /dev/null
) {
$options->{maketar} = 1;
# check if the compressor is installed
if (defined $tar_compressor) {
@ -4567,30 +4571,31 @@ https URI, then the packages apt-transport-https and ca-certificates will be
installed inside the chroot. If any mirror contains a tor+xxx URI, then the
apt-transport-tor package will be installed inside the chroot.
The optional I<TARGET> argument can either be the path to a directory, the
path to a tarball filename, the path to a squashfs image or C<->. If I<TARGET>
ends with C<.tar>, or with any of the filename extensions listed in the
section B<COMPRESSION>, then I<TARGET> will be interpreted as a path to a
tarball filename. If I<TARGET> ends with C<.squashfs> or C<.sqfs>, then
I<TARGET> will be interpreted as a path to a squashfs image. If I<TARGET> is
the path to a tarball filename or a squashfs image or if I<TARGET> is C<-> or
if no I<TARGET> was specified, B<mmdebstrap> will create a temporary chroot
The optional I<TARGET> argument can either be the path to a directory, the path
to a tarball filename, the path to a squashfs image, a FIFO, a character
special device, or C<->. If I<TARGET> ends with C<.tar>, or with any of the
filename extensions listed in the section B<COMPRESSION>, or if I<TARGET> is a
FIFO or a character special device, then I<TARGET> will be interpreted as a
path to a tarball filename. If I<TARGET> ends with C<.squashfs> or C<.sqfs>,
then I<TARGET> will be interpreted as a path to a squashfs image. If I<TARGET>
is the path to a tarball filename or a squashfs image or if I<TARGET> is C<->
or if no I<TARGET> was specified, B<mmdebstrap> will create a temporary chroot
directory in C<$TMPDIR> or F</tmp>. If I<TARGET> is the path to a tarball
filename, B<mmdebstrap> will create a tarball of that directory and store it
as I<TARGET>, optionally applying a compression algorithm as indicated by its
filename extension. If I<TARGET> is C<-> or if no I<TARGET> was specified,
then an uncompressed tarball of that directory will be sent to standard
output. When B<mmdebstrap> creates a tarball it also stores extended
attributes. To preserve the extended attributes, you have to pass B<--xattrs
--xattrs-include='*'> to tar when extracting the tarball. If I<TARGET> is the
path to a squashfs image, B<mmdebstrap> will create an xz compressed image
with a blocksize of 1048576 bytes. If I<TARGET> does neither end with C<.tar>
nor with any of the filename extensions listed in the section B<COMPRESSION>,
nor with C<.squashfs> or C<.sqfs>, then I<TARGET> will be interpreted as the
path to a directory. If the directory already exists, it must either be empty
or only contain an empty C<lost+found> directory. If a directory is chosen as
output in any other mode than B<sudo>, then its contents will have wrong
ownership information and special device files will be missing.
filename, B<mmdebstrap> will create a tarball of that directory and store it as
I<TARGET>, optionally applying a compression algorithm as indicated by its
filename extension. If I<TARGET> is C<-> or if no I<TARGET> was specified, then
an uncompressed tarball of that directory will be sent to standard output. When
B<mmdebstrap> creates a tarball it also stores extended attributes. To preserve
the extended attributes, you have to pass B<--xattrs --xattrs-include='*'> to
tar when extracting the tarball. If I<TARGET> is the path to a squashfs image,
B<mmdebstrap> will create an xz compressed image with a blocksize of 1048576
bytes. If I<TARGET> does neither end with C<.tar> nor with any of the filename
extensions listed in the section B<COMPRESSION>, nor with C<.squashfs> or
C<.sqfs>, then I<TARGET> will be interpreted as the path to a directory. If the
directory already exists, it must either be empty or only contain an empty
C<lost+found> directory. If a directory is chosen as output in any other mode
than B<sudo>, then its contents will have wrong ownership information and
special device files will be missing.
The I<SUITE> may be a valid release code name (eg, sid, stretch, jessie) or a
symbolic name (eg, unstable, testing, stable, oldstable). Any suite name that