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copy setsid to setsidu so it does not get overwritten by busybox when used in init, and ensure inittab is clean

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Signed-off-by: Avi Deitcher <avi@deitcher.net>
This commit is contained in:
Avi Deitcher
2017-06-13 21:59:42 +03:00
parent fd00f19c59
commit 42bf54de28
2 changed files with 15 additions and 5 deletions
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11
pkg/getty/Dockerfile
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@@ -9,6 +9,17 @@ RUN apk add --no-cache --initdb -p /out \
util-linux \
&& true
RUN rm -rf /out/etc/apk /out/lib/apk /out/var/cache
#
# We require a version of `setsid(1)` which supports the `-w`
# option, which is not available in all implementations (e.g. the
# `busybox` implementation does not support it). When this is run
# as part of a LinuxKit `init` image (rather than as a standalone
# container) we cannot guarantee which version of `setsid` will
# be present once the layers are combined, so we take a copy of
# our own, known good, version for use later.
RUN cp /out/usr/bin/setsid /out/usr/bin/setsid.getty
# we really do not want a rogue inittab here
RUN rm -rf /out/etc/inittab
FROM scratch
ENTRYPOINT ["/sbin/tini","-s","-v","--"]