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loop-aes and gpgkey as a symlink

Hello.

I managed to find out what causes the whole loop file to be read for gpg
keys (http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=450784).

mount/lomount.c, function do_GPG_pipe():

#v+
    if(loopOffsetBytes && !strcmp(loopFileName, gpgKeyFile)) {
#v-

This condition won't apply because loopFileName was canonicalize()'d. So
the solution is simple: canonicalize() or myrealpath() gpgKeyFile as
well.

That's where the fun begins: I can't just put canonicalize() or
myrealpath() there because losetup doesn't link sundries.o. If I call
gcc manually with sundries.o added, there comes "multiple definition of
..." (error, xstrdup, ...). 

I don't really know why lomount.c has its own error() & stuff and I
didn't want to break anything.

So anyone with deeper util-linux knowledge please fix it :).

Regards,

-- 
hondza | GPG key: http://www.hondza.adslink.cz/key.asc
Fingerprint: 31E7 EF56 7280 5C89 75E9 FF9D 010E 175F 7823 CF38
GPG/PGP encrypted/signed emails are welcome.


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Linux-crypto:  cryptography in and on the Linux system
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