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backuputils
2005 Jan 19
1
PROPOSAL: --link-hash-dest, additional linking of files to their HASH values
...i*2+prefixdirs+1] = hex_char[md[i] >> 4];
hashpath[hashdirlen+i*2+prefixdirs+2] = hex_char[md[i] & 0xf];
}
hashpath[hashdirlen+prefixdirs+digestlength*2+1] = '\0';
...
The three utilities (hashimplode, hashdelete, hashpurge) are at
http://www.cmb.usc.edu/people/dld/backuputils/. hashimplode calculates the
hashes and hardlinks files. hashdelete removes a snapshot, removing
orphaned hash files as it goes, and hashpurge is roughly "find /hashdir
-nlinks 1 | xargs rm", in case you haven't always used hasdelete. All three
use rename() to avoid races on files...