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update docs/reference/commandline/cp.md

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Close #22020

Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>
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Akihiro Suda 2016-05-23 09:10:14 +00:00
parent f18224de14
commit cb1635c9cf
2 changed files with 21 additions and 2 deletions
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12
docs/reference/commandline/cp.md
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@ -81,7 +81,17 @@ you must be explicit with a relative or absolute path, for example:
`/path/to/file:name.txt` or `./file:name.txt`
It is not possible to copy certain system files such as resources under
`/proc`, `/sys`, `/dev`, and mounts created by the user in the container.
`/proc`, `/sys`, `/dev`, [tmpfs](run.md#mount-tmpfs-tmpfs), and mounts created by
the user in the container. However, you can still copy such files by manually
running `tar` in `docker exec`. For example (consider `SRC_PATH` and `DEST_PATH`
are directories):
$ docker exec foo tar Ccf $(dirname SRC_PATH) - $(basename SRC_PATH) | tar Cxf DEST_PATH -
or
$ tar Ccf $(dirname SRC_PATH) - $(basename SRC_PATH) | docker exec -i foo tar Cxf DEST_PATH -
Using `-` as the `SRC_PATH` streams the contents of `STDIN` as a tar archive.
The command extracts the content of the tar to the `DEST_PATH` in container's

11
man/docker-cp.1.md
View file

@ -78,7 +78,16 @@ you must be explicit with a relative or absolute path, for example:
`/path/to/file:name.txt` or `./file:name.txt`
It is not possible to copy certain system files such as resources under
`/proc`, `/sys`, `/dev`, and mounts created by the user in the container.
`/proc`, `/sys`, `/dev`, tmpfs, and mounts created by the user in the container.
However, you can still copy such files by manually running `tar` in `docker exec`.
For example (consider `SRC_PATH` and `DEST_PATH` are directories):
$ docker exec foo tar Ccf $(dirname SRC_PATH) - $(basename SRC_PATH) | tar Cxf DEST_PATH -
or
$ tar Ccf $(dirname SRC_PATH) - $(basename SRC_PATH) | docker exec -i foo tar Cxf DEST_PATH -
Using `-` as the `SRC_PATH` streams the contents of `STDIN` as a tar archive.
The command extracts the content of the tar to the `DEST_PATH` in container's