588e87590d
* add support for systemd, OpenRC, SysVinit, and Dinit * add automatic init-system detection through CMake * make libsystemd optional for non-systemd builds * add native service definitions for all supported init systems * add Gentoo ebuild and Alpine APKBUILD packaging support * publish the official BastionGuard source repository * update the README with supported distributions, init systems, repository information, and build documentation
85 lines
3.4 KiB
CMake
85 lines
3.4 KiB
CMake
# BastionGuard init-system selection.
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#
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# BASTIONGUARD_INIT_SYSTEM may be AUTO, SYSTEMD, OPENRC, SYSVINIT or DINIT.
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# AUTO is suitable for local builds. Distribution packages should pass an
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# explicit value because the build host/chroot init may differ from the target.
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set(BASTIONGUARD_INIT_SYSTEM "AUTO" CACHE STRING
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"Init system used by BastionGuard: AUTO, SYSTEMD, OPENRC, SYSVINIT or DINIT")
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set_property(CACHE BASTIONGUARD_INIT_SYSTEM PROPERTY STRINGS
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AUTO SYSTEMD OPENRC SYSVINIT DINIT)
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function(bastionguard_detect_init_system out_var)
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string(TOUPPER "${BASTIONGUARD_INIT_SYSTEM}" _requested)
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if(NOT _requested MATCHES "^(AUTO|SYSTEMD|OPENRC|SYSVINIT|DINIT)$")
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message(FATAL_ERROR
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"Invalid BASTIONGUARD_INIT_SYSTEM='${BASTIONGUARD_INIT_SYSTEM}'. "
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"Use AUTO, SYSTEMD, OPENRC, SYSVINIT or DINIT.")
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endif()
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if(NOT _requested STREQUAL "AUTO")
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set(${out_var} "${_requested}" PARENT_SCOPE)
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return()
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endif()
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find_program(_BG_RC_SERVICE rc-service)
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find_program(_BG_OPENRC_RUN openrc-run)
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find_program(_BG_SYSTEMCTL systemctl)
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find_program(_BG_DINITCTL dinitctl)
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find_program(_BG_SERVICE service)
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find_program(_BG_UPDATE_RC_D update-rc.d)
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find_program(_BG_CHKCONFIG chkconfig)
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# Prefer runtime markers, then the configured PID 1 implementation.
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# Tool presence alone is only a fallback because compatibility commands
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# can coexist with another init system.
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set(_BG_INIT_REAL "")
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if(EXISTS "/sbin/init")
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get_filename_component(_BG_INIT_REAL "/sbin/init" REALPATH)
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elseif(EXISTS "/usr/sbin/init")
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get_filename_component(_BG_INIT_REAL "/usr/sbin/init" REALPATH)
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endif()
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string(TOLOWER "${_BG_INIT_REAL}" _BG_INIT_REAL_LOWER)
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if(EXISTS "/run/openrc")
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set(_detected "OPENRC")
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elseif(EXISTS "/run/systemd/system")
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set(_detected "SYSTEMD")
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elseif(EXISTS "/dev/dinitctl" OR EXISTS "/run/dinitctl")
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set(_detected "DINIT")
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elseif(_BG_INIT_REAL_LOWER MATCHES "openrc")
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set(_detected "OPENRC")
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elseif(_BG_INIT_REAL_LOWER MATCHES "systemd")
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set(_detected "SYSTEMD")
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elseif(_BG_INIT_REAL_LOWER MATCHES "(^|/)dinit($|[-.])")
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set(_detected "DINIT")
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elseif(_BG_INIT_REAL_LOWER MATCHES "sysvinit")
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set(_detected "SYSVINIT")
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elseif(_BG_RC_SERVICE AND _BG_OPENRC_RUN)
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set(_detected "OPENRC")
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elseif(_BG_DINITCTL AND NOT _BG_SYSTEMCTL)
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set(_detected "DINIT")
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message(WARNING
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"No active init marker found; selecting DINIT because dinitctl is "
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"available and systemctl is not. Set -DBASTIONGUARD_INIT_SYSTEM "
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"explicitly for reproducible packages.")
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elseif(_BG_SYSTEMCTL)
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# Packaging fallback when configuring in a chroot without a running
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# PID 1. Pass an explicit value for reproducible packages.
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set(_detected "SYSTEMD")
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message(WARNING
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"No active init marker found; selecting SYSTEMD because systemctl "
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"is available. Set -DBASTIONGUARD_INIT_SYSTEM explicitly for "
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"reproducible packages.")
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elseif(EXISTS "/etc/init.d" AND
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(_BG_SERVICE OR _BG_UPDATE_RC_D OR _BG_CHKCONFIG))
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set(_detected "SYSVINIT")
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else()
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message(FATAL_ERROR
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"Unable to detect the init system. Set "
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"-DBASTIONGUARD_INIT_SYSTEM=SYSTEMD|OPENRC|SYSVINIT|DINIT.")
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endif()
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set(${out_var} "${_detected}" PARENT_SCOPE)
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endfunction()
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