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rdup-tr - Online in the Cloud

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This is the command rdup-tr that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

NAME


rdup-tr - transform rdup output

SYNOPSIS


rdup-tr [OPTION]...

DESCRIPTION


Transform rdup output into something else. Where something else can be a tar, cpio, pax
archive or another rdup stream.

The rdup archive must be given on rdup-tr's standard input.

You can select multiple types of output (-O flag), but you must be aware that you may
loose some information in formats other than rdup's own, see the table below.

You may also supply rdup-tr with only a list of pathnames, this can be selected with the
-L flag.

The following table shows what happens with the output depending on the input.

0 OK

D delete information is lost

H hardlink information is lost

│ │
output │ tar,cpio,pax │ rdup
input │ │
------------- │ ------------- │ ------
rdup │ D │ 0
filelist │ DH │ H
│ │

OPTIONS


-L Select list input format. Normally rdup-tr accepts rdup output, with this option
you can give it a list of path names. Note: with list input rdup-tr will `stat()`
each file.

-O Output format. This can be 'tar', 'cpio', 'pax' or 'rdup'. It defaults to 'rdup'.

-X key Read the encryption key from the file key and encrypt all paths with Blowfish and
this key and iv. After the encryption the binary data is converted into ASCII using
an URL safe (Section 4 of RFC 3548) version of base64 encode.

The encryption key must be on the first line and the key size must be 16 and 8
bytes for the iv, so 24 in total.

-Y key Read the decryption key from the file key and decrypt all paths with Blowfish and
this key. Before the encryption the paths are converted to binary by using an URL
safe version of base64 decode.

-c Force output to the tty. Normally rdup-tr wants to see it's output redirected.

-v Be more verbose.

-V Print rdup-tr's version.

-h A short help.

EXAMPLES


The following is possible

rdup -Pgzip -Pmcrypt,-f,KEY,-c /dev/null /home | \
rdup-tr -O tar -X<(echo secret) | gzip > \
my-home-zipped-crypted-pathcrypted-tar.gz

That is: all files under /home are gzipped and encrypted on a per file basis (first line).
Further more, all pathnames are Blowfish encrypted (second line) with the key 'secret'.
This is put in a tar file, which is then compressed, resulting in the final output (final
line).

Creating a compressed and encrypted tar archive out of a full rdup dump might be done as
follows

rdup -Pgzip -Pmcrypt,-f,KEY,-c /dev/null /home | \
rdup-tr -O tar > my-home-zipped-and-crypted.tar

Or even pack and unpack it on the fly

rdup -Pgzip -Pmcrypt,-fKEY,-c /dev/null /home | rdup-tr -Otar | \
ssh user@remotehost tar xvCf /tmp -

Or encryption with openssl

rdup -Popenssl,enc,-e,-des-cbc,-k,secret /dev/null /home

Or, compressing with gzip, encrypting with openssl and then compressing the entire archive
yet again

rdup -Pgzip -Popenssl,enc,-e,-des-cbc,-k,secret /dev/null /home | \
gzip > my_compressed_encrypted_rdup_archive.gz

Recreating the original rdup output, which can be fed to rdup-up.

gunzip -c my_compressed_encrypted_rdup_archive.gz |\
rdup-tr -Popenssl,enc,-d,-des-cbc,-k,secret -Pgzip,-d >\
my_rdup_archive

rdup-up < my_rdup_archive -t /tmp/restore

Notice the reversal of the -P options.

EXIT CODE


rdup-tr return a zero exit code on success, otherwise 1 is returned.

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