34 lines
1.3 KiB
Docker
34 lines
1.3 KiB
Docker
ARG BASE_IMAGE
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FROM $BASE_IMAGE
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USER root
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ARG REMOTE_USER
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ARG NEW_UID
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ARG NEW_GID
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SHELL ["/bin/sh", "-c"]
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RUN eval $(sed -n "s/${REMOTE_USER}:[^:]*:\([^:]*\):\([^:]*\):[^:]*:\([^:]*\).*/OLD_UID=\1;OLD_GID=\2;HOME_FOLDER=\3/p" /etc/passwd); \
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eval $(sed -n "s/\([^:]*\):[^:]*:${NEW_UID}:.*/EXISTING_USER=\1/p" /etc/passwd); \
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eval $(sed -n "s/\([^:]*\):[^:]*:${NEW_GID}:.*/EXISTING_GROUP=\1/p" /etc/group); \
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if [ -z "$OLD_UID" ]; then \
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echo "Remote user not found in /etc/passwd ($REMOTE_USER)."; \
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elif [ "$OLD_UID" = "$NEW_UID" -a "$OLD_GID" = "$NEW_GID" ]; then \
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echo "UIDs and GIDs are the same ($NEW_UID:$NEW_GID)."; \
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elif [ "$OLD_UID" != "$NEW_UID" -a -n "$EXISTING_USER" ]; then \
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echo "User with UID exists ($EXISTING_USER=$NEW_UID)."; \
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else \
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if [ "$OLD_GID" != "$NEW_GID" -a -n "$EXISTING_GROUP" ]; then \
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echo "Group with GID exists ($EXISTING_GROUP=$NEW_GID)."; \
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NEW_GID="$OLD_GID"; \
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fi; \
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echo "Updating UID:GID from $OLD_UID:$OLD_GID to $NEW_UID:$NEW_GID."; \
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sed -i -e "s/\(${REMOTE_USER}:[^:]*:\)[^:]*:[^:]*/\1${NEW_UID}:${NEW_GID}/" /etc/passwd; \
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if [ "$OLD_GID" != "$NEW_GID" ]; then \
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sed -i -e "s/\([^:]*:[^:]*:\)${OLD_GID}:/\1${NEW_GID}:/" /etc/group; \
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fi; \
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chown -R $NEW_UID:$NEW_GID $HOME_FOLDER; \
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fi;
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ARG IMAGE_USER
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USER $IMAGE_USER
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