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c0377bf343
This utility image takes a tarball as input and places the contents into a read-only, compressed squashfs filesystem which is produced on stdout. Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
23 lines
447 B
Bash
Executable File
23 lines
447 B
Bash
Executable File
#!/bin/sh
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set -e
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mkdir -p /tmp/rootfs
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cd /tmp/rootfs
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# input is a tarball of filesystem on stdin with the root filesytem
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# output is a squashfs image on stdout
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# extract. BSD tar auto recognises compression, unlike GNU tar
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# only if stdin is a tty, if so need files volume mounted...
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[ -t 0 ] || bsdtar xzf -
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cd /tmp
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# we want everything except the final result to stderr
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(
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exec 1>&2;
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mksquashfs rootfs ./rootfs.img
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)
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cat rootfs.img
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