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qemu-img: add the 'dd' subcommand

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This patch adds a basic dd subcommand analogous to dd(1) to qemu-img.

For the start, this implements the bs, if, of and count options and requires
both if and of to be specified (no stdin/stdout if not specified) and doesn't
support tty, pipes, etc.

The image format must be specified with -O for the output if the raw format
is not the intended one.

Two tests are added to test qemu-img dd.

Signed-off-by: Reda Sallahi <fullmanet@gmail.com>
Message-id: 20160810024312.14544-1-fullmanet@gmail.com
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
[mreitz: Moved test 158 to 170]
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Reda Sallahi 2016-08-10 04:43:12 +02:00 • committed by Max Reitz
parent a008535b9f
commit 86ce1f6e2b
10 changed files with 584 additions and 5 deletions
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15
tests/qemu-iotests/170.out Normal file
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QA output created by 170
== Creating image ==
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576
No errors were found on the image.
wrote 1048576/1048576 bytes at offset 0
1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
== Converting the image with dd ==
No errors were found on the image.
== Compare the images with qemu-img compare ==
Images are identical.
*** done