wehub-resource-sync
e84fb4a79e
container project - merge build / Invoke build (push) Successful in 1s
76 lines
2.7 KiB
Bash
Executable File
76 lines
2.7 KiB
Bash
Executable File
#!/bin/sh
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#
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# Container machine init script — replaces /sbin/init as the first process (PID 1)
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# executed when a container machine boots. Performs container machine-specific setup
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# before handing off to the real system init:
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#
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# 1. Resolve the system default shell.
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# Debian/Ubuntu systems use DSHELL from /etc/adduser.conf; other images
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# use SHELL from /etc/default/useradd. Falls back to /bin/bash or /bin/sh.
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#
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# 2. Open a user shell when invoked with the "-s" flag.
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# Looks up the current user's shell from /etc/passwd and execs into it,
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# falling back to the system default shell. If additional arguments follow
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# "-s", runs them as a command via "<shell> -c <args>" instead of dropping
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# into an interactive session.
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#
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# 3. Run first-time user setup when invoked with the "-u" flag (only once).
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# If /etc/.machine.initialized does not exist, runs the create-user script
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# to create the container user and apply one-time configuration. A custom
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# script at /etc/machine/create-user.sh takes precedence over the built-in
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# one at /sbin.machine/create-user.sh. Marks initialization complete by
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# touching /etc/.machine.initialized.
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#
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# 4. Boot the system when invoked with no flags.
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# Sets the hostname to CONTAINER_MACHINE_ID and execs /sbin/init to hand
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# off to the real system init.
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#
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set -e
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MACHINE_INITIALIZED=/etc/.machine.initialized
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CUSTOM_SETUP=/etc/machine/create-user.sh
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DEFAULT_SETUP=/sbin.machine/create-user.sh
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. /etc/os-release 2>/dev/null
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case "${ID:-}" in
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ubuntu|debian)
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SHELL=$(unset DSHELL; . /etc/adduser.conf 2>/dev/null \
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&& [ -n "${DSHELL:-}" ] \
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&& echo "${DSHELL}") || SHELL=/bin/bash ;;
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*)
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SHELL=$(unset SHELL; . /etc/default/useradd 2>/dev/null \
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&& [ -n "${SHELL:-}" ] \
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&& echo "${SHELL}") || SHELL=/bin/sh ;;
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esac
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export CONTAINER_SHELL=${SHELL}
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if [ "$1" = "-s" ]; then
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shift
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USER_SHELL=$(grep "^$(id -un):" /etc/passwd 2>/dev/null | cut -d: -f7)
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if [ $# -gt 0 ]; then
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exec "${USER_SHELL:-${SHELL}}" -c "$*"
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else
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exec "${USER_SHELL:-${SHELL}}"
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fi
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elif [ "$1" = "-u" ]; then
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# DEPRECATED 0.11.0.0 - use `id` instead of checking `${MACHINE_INITIALIZED}` for backward compatibility, remove in 0.13.0.0
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if ! id "${CONTAINER_USER}" >/dev/null 2>&1; then
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if [ -f ${CUSTOM_SETUP} ]; then
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${CUSTOM_SETUP}
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else
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${DEFAULT_SETUP}
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fi
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fi
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echo 1 > ${MACHINE_INITIALIZED}
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else
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echo "${CONTAINER_MACHINE_ID}" > /etc/hostname
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if [ -S ${SSH_AUTH_SOCK} ]; then
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chown ${CONTAINER_UID}:${CONTAINER_GID} ${SSH_AUTH_SOCK}
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fi
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exec /sbin/init
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fi
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