65 lines
1.7 KiB
Bash
Executable File
65 lines
1.7 KiB
Bash
Executable File
#!/bin/bash
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#-----------------------------------------------------------------------------------------------------------------------
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function ts {
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echo [`date '+%b %d %X'`]
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}
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#-----------------------------------------------------------------------------------------------------------------------
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function process_args {
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# These are intended to be global
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USER_ID=$1
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GROUP_ID=$2
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if [[ ! "$USER_ID" =~ ^[0-9]{1,}$ ]]
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then
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echo "User ID value $USER_ID is not valid. It must be a whole number"
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exit 1
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fi
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if [[ ! "$GROUP_ID" =~ ^[0-9]{1,}$ ]]
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then
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echo "Group ID value $GROUP_ID is not valid. It must be a whole number"
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exit 1
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fi
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}
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#-----------------------------------------------------------------------------------------------------------------------
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function create_user {
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local USER_ID=$1
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local GROUP_ID=$2
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USER="user_${USER_ID}_$GROUP_ID"
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GROUP="group_${USER_ID}_$GROUP_ID"
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if id -u $USER >/dev/null 2>&1
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then
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echo "$(ts) User \"$USER\" already exists. Skipping creation of user and group..."
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return
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fi
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echo "$(ts) Creating user \"$USER\" (ID $USER_ID) and group \"$GROUP\" (ID $GROUP_ID) to run the command..."
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# We could be aliasing this new user to some existing user. I assume that's harmless.
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groupadd -o -g $GROUP_ID $GROUP
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useradd -o -u $USER_ID -r -g $GROUP -d /home/$USER -s /sbin/nologin -c "Docker image user" $USER
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mkdir -p /home/$USER
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chown -R $USER:$GROUP /home/$USER
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}
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#-----------------------------------------------------------------------------------------------------------------------
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process_args "$@"
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# Shift off the args so that we can exec $@ below
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shift; shift
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create_user $USER_ID $GROUP_ID
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echo "$(ts) Running command as user \"$USER\"..."
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exec /sbin/setuser $USER "$@"
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