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#!/usr/bin/env perl
use strict;
use warnings;
# type codes:
# 0 -> normal file
# 1 -> hardlink
# 2 -> symlink
# 3 -> character special
# 4 -> block special
# 5 -> directory
my @devfiles = (
# filename mode type link target major minor
["", oct(755), 5, '', undef, undef],
["console", oct(666), 3, '', 5, 1],
["fd", oct(777), 2, '/proc/self/fd', undef, undef],
["full", oct(666), 3, '', 1, 7],
["null", oct(666), 3, '', 1, 3],
["ptmx", oct(666), 3, '', 5, 2],
["pts/", oct(755), 5, '', undef, undef],
["random", oct(666), 3, '', 1, 8],
["shm/", oct(755), 5, '', undef, undef],
["stderr", oct(777), 2, '/proc/self/fd/2', undef, undef],
["stdin", oct(777), 2, '/proc/self/fd/0', undef, undef],
["stdout", oct(777), 2, '/proc/self/fd/1', undef, undef],
["tty", oct(666), 3, '', 5, 0],
["urandom", oct(666), 3, '', 1, 9],
["zero", oct(666), 3, '', 1, 5],
);
my $mtime = time;
if (exists $ENV{SOURCE_DATE_EPOCH}) {
$mtime = $ENV{SOURCE_DATE_EPOCH} + 0;
}
foreach my $file (@devfiles) {
my ($fname, $mode, $type, $linkname, $devmajor, $devminor) = @{$file};
my $entry = pack(
'a100 a8 a8 a8 a12 a12 A8 a1 a100 a8 a32 a32 a8 a8 a155 x12',
"./dev/$fname",
sprintf('%07o', $mode),
sprintf('%07o', 0), # uid
sprintf('%07o', 0), # gid
sprintf('%011o', 0), # size
sprintf('%011o', $mtime),
'', # checksum
$type,
$linkname,
"ustar ",
'', # username
'', # groupname
defined($devmajor) ? sprintf('%07o', $devmajor) : '',
defined($devminor) ? sprintf('%07o', $devminor) : '',
'', # prefix
);
# compute and insert checksum
substr($entry, 148, 7)
= sprintf("%06o\0", unpack("%16C*", $entry));
print $entry;
}
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