“invalid tar magic” on OpenWRT

archiveopenwrttar

I'm trying to install JavaSE on a OpenWrt (Pandorabox) device. When I run

tar -xvf ejdk-8u65-linux-arm-sflt.tar.gz

I get tar: invalid tar magic.
How can I solve this problem?

Best Answer

The version of tar on OpenWRT is a smaller one than the one on full-blown systems, designed to fit small devices (it's BusyBox.) To keep small, it lacks features such as the automatic detection of compressed archives.

Try declaring the compression format manually with the -z option:

tar -xvzf ejdk-8u65-linux-arm-sflt.tar.gz

Support for gzip in the tar utility is an optional feature that may or may not be enabled on OpenWRT. If you don't have it, call zcat (or gzip -dc) explicitly:

zcat ejdk-8u65-linux-arm-sflt.tar.gz | tar -xvf -

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The : in the filename are confusing tar. At least for the coreutils version of tar, the --file switch can take an argument of the form:

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so I'm guessing tar is trying to interpret that filename in a manner that is not what you meant.

Prefixing the file name with ./ (or specifying a full path) should solve your problem.

TAR_DUMP="./gypo_$NOW.tar.gz"
echo "Tar name: $TAR_DUMP"
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Another fix would be to add the --force-local switch.

--force-local

Forces `tar' to interpret the filename given to --file as a local file, even if it looks like a remote tape drive name.

Best Answer

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