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unset TMPDIR environment variable for everything running inside the chroot

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This commit is contained in:
Johannes 'josch' Schauer 2020-03-07 02:06:11 +01:00
parent 5107116384
commit bd84829595
Signed by untrusted user: josch
GPG key ID: F2CBA5C78FBD83E1
1 changed files with 24 additions and 9 deletions
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mmdebstrap
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@ -1136,13 +1136,14 @@ sub run_hooks {
# execute it directly if it's an executable file
# or if it there are no shell metacharacters
# (the /a regex modifier makes \w match only ASCII)
0 == system($script, $options->{root})
0 == system('env', '--unset=TMPDIR', $script, $options->{root})
or error "command failed: $script";
} else {
info "running --$name-hook in shell: sh -c '$script' exec"
. " $options->{root}";
# otherwise, wrap everything in sh -c
0 == system('sh', '-c', $script, 'exec', $options->{root})
0 == system('env', '--unset=TMPDIR',
'sh', '-c', $script, 'exec', $options->{root})
or error "command failed: $script";
}
}
@ -1982,9 +1983,9 @@ sub setup {
}
}
# make sure that APT_CONFIG is not set when executing anything
# inside the chroot
my @chrootcmd = ();
# make sure that APT_CONFIG and TMPDIR are not set when executing
# anything inside the chroot
my @chrootcmd = ('env', '--unset=APT_CONFIG', '--unset=TMPDIR');
if ($options->{mode} eq 'proot') {
push @chrootcmd,
(
@ -4905,15 +4906,16 @@ hook options in the section B<OPTIONS>.
The options can be specified multiple times and the commands are executed in
the order in which they are given on the command line. There are three
different types of hook option arguments. If the argument passed to the hook
option starts with C<copy-in>, C<copy-out>, C<tar-in>, C<tar-out>, C<upload>
or C<download> followed by a space, then the hook is interpreted as a special
option starts with C<copy-in>, C<copy-out>, C<tar-in>, C<tar-out>, C<upload> or
C<download> followed by a space, then the hook is interpreted as a special
hook. Otherwise, if I<command> is an existing executable file from C<$PATH> or
if I<command> does not contain any shell metacharacters, then I<command> is
directly exec-ed with the path to the chroot directory passed as the first
argument. Otherwise, I<command> is executed under I<sh> and the chroot
directory can be accessed via I<$1>. All environment variables used by
directory can be accessed via I<$1>. All environment variables set by
B<mmdebstrap> (like C<APT_CONFIG>, C<DEBIAN_FRONTEND>, C<LC_ALL> and C<PATH>)
are preserved.
are preserved. All environment variables set by the user are preserved, except
for C<TMPDIR> which is cleared.
The paths inside the chroot are relative to the root directory of the chroot.
The path on the outside is relative to current directory of the original
@ -5092,9 +5094,22 @@ Build a non-Debian chroot like Ubuntu bionic:
=head1 ENVIRONMENT VARIABLES
=over 8
=item C<SOURCE_DATE_EPOCH>
By setting C<SOURCE_DATE_EPOCH> the result will be reproducible over multiple
runs with the same options and mirror content.
=item C<TMPDIR>
When creating a tarball, a temporary directory is populated with the rootfs
before the tarball is packed. The location of that temporary directory will be
in F</tmp> or the location pointed to by C<TMPDIR> if that environment variable
is set.
=back
=head1 DEBOOTSTRAP
This section lists some differences to debootstrap.