Hi there.
I've recently upgraded my email relay, which has amavisd-new installed,
and when amavis starts up it logs all the file types which it doesn't
have decoders for. Looking at the amavisd-new script, I can see that
@decoders is set to:
@decoders = (
['mail', \&Amavis::Unpackers::do_mime_decode],
# [[qw(asc uue hqx ync)], \&Amavis::Unpackers::do_ascii], # not safe
['F', \&Amavis::Unpackers::do_uncompress, \$unfreeze],
# ['unfreeze', 'freeze -d', 'melt', 'fcat'] ],
['Z', \&Amavis::Unpackers::do_uncompress, \$uncompress],
# ['uncompress', 'gzip -d', 'zcat'] ],
['gz', \&Amavis::Unpackers::do_uncompress, \$gunzip],
['gz', \&Amavis::Unpackers::do_gunzip],
['bz2', \&Amavis::Unpackers::do_uncompress, \$bunzip2],
['xz', \&Amavis::Unpackers::do_uncompress,
['xzdec', 'xz -dc', 'unxz -c', 'xzcat'] ],
['lzma', \&Amavis::Unpackers::do_uncompress,
['lzmadec', 'xz -dc --format=lzma',
'lzma -dc', 'unlzma -c', 'lzcat', 'lzmadec'] ],
['lrz', \&Amavis::Unpackers::do_uncompress,
['lrzip -q -k -d -o -', 'lrzcat -q -k'] ],
['lzo', \&Amavis::Unpackers::do_uncompress, \$unlzop],
['lz4', \&Amavis::Unpackers::do_uncompress, ['lz4c -d'] ],
['rpm', \&Amavis::Unpackers::do_uncompress, \$rpm2cpio],
# ['rpm2cpio.pl', 'rpm2cpio'] ],
[['cpio','tar'], \&Amavis::Unpackers::do_pax_cpio, \$pax],
# ['/usr/local/heirloom/usr/5bin/pax', 'pax', 'gcpio',
'cpio'] ],
# ['tar', \&Amavis::Unpackers::do_tar], # no longer supported
['deb', \&Amavis::Unpackers::do_ar, \$ar],
# ['a', \&Amavis::Unpackers::do_ar, \$ar], #unpacking .a seems an
overkill
['rar', \&Amavis::Unpackers::do_unrar, \$unrar], # ['unrar',
'rar']
['arj', \&Amavis::Unpackers::do_unarj, \$unarj], # ['unarj',
'arj']
['arc', \&Amavis::Unpackers::do_arc, \$arc], # ['nomarch',
'arc']
['zoo', \&Amavis::Unpackers::do_zoo, \$zoo], # ['zoo',
'unzoo']
['doc', \&Amavis::Unpackers::do_ole, \$ripole],
['cab', \&Amavis::Unpackers::do_cabextract, \$cabextract],
['tnef', \&Amavis::Unpackers::do_tnef_ext, \$tnef],
['tnef', \&Amavis::Unpackers::do_tnef],
# ['lha', \&Amavis::Unpackers::do_lha, \$lha], # not safe, use
7z instead
# ['sit', \&Amavis::Unpackers::do_unstuff, \$unstuff], # not safe
[['zip','kmz'], \&Amavis::Unpackers::do_7zip, ['7za', '7z'] ],
[['zip','kmz'], \&Amavis::Unpackers::do_unzip],
['7z', \&Amavis::Unpackers::do_7zip, ['7zr', '7za', '7z'] ],
[[qw(gz bz2 Z tar)],
\&Amavis::Unpackers::do_7zip, ['7za', '7z'] ],
[[qw(xz lzma jar cpio arj rar swf lha iso cab deb rpm)],
\&Amavis::Unpackers::do_7zip, '7z' ],
['exe', \&Amavis::Unpackers::do_executable, \$unrar, \$lha,
\$unarj],
);
Which seems to say that 7z can be used for the following file extensions:
zip kmz
7z
gz bz2 Z tar
xz lzma jar cpio arj rar swf lha iso cab deb rpm
So after installing p7zip-full and p7zip-rar packages, which provide the
7z program (and also 7zr and 7za), I'm curious why I still see warnings
for rpm, rar, arj and cab:
Aug 29 13:13:39 mx amavis[10781]: No ext program for .rpm, tried:
rpm2cpio.pl, rpm2cpio
Aug 29 13:13:39 mx amavis[10781]: No ext program for .rar, tried:
unrar-free
Aug 29 13:13:39 mx amavis[10781]: No ext program for .arj, tried:
arj, unarj
Aug 29 13:13:39 mx amavis[10781]: No ext program for .cab, tried:
cabextract
Does this mean that 7z isn't going to be used for these file types? And
if so, is there something I can do to get amavis to use 7z for these
file types?
Or should these messages just be ignored?
And on a related note, I know (on Windows at least) 7-zip can handle
self-extracting exe files, although I notice that the "man 7z" manual
page doesn't mention EXE files. So I wonder whether exe should or
shouldn't be added to the list of files that 7z can handle in a future
version of amavis?
Thanks,
Nick.
