SUMMARY = "Versatile implementation of the Network Time Protocol"
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DESCRIPTION = "Chrony can synchronize the system clock with NTP \
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servers, reference clocks (e.g. GPS receiver), and manual input using \
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wristwatch and keyboard. It can also operate as an NTPv4 (RFC 5905) \
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server and peer to provide a time service to other computers in the \
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network. \
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\
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It is designed to perform well in a wide range of conditions, \
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including intermittent network connections, heavily congested \
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networks, changing temperatures (ordinary computer clocks are \
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sensitive to temperature), and systems that do not run continuously, or \
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run on a virtual machine. \
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\
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Typical accuracy between two machines on a LAN is in tens, or a few \
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hundreds, of microseconds; over the Internet, accuracy is typically \
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within a few milliseconds. With a good hardware reference clock \
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sub-microsecond accuracy is possible. \
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\
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Two programs are included in chrony: chronyd is a daemon that can be \
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started at boot time and chronyc is a command-line interface program \
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which can be used to monitor chronyd's performance and to change \
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various operating parameters whilst it is running. \
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\
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This recipe produces two binary packages: 'chrony' which contains chronyd, \
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the configuration file and the init script, and 'chronyc' which contains \
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the client program only."
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HOMEPAGE = "https://chrony.tuxfamily.org/"
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SECTION = "net"
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LICENSE = "GPLv2"
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LIC_FILES_CHKSUM = "file://COPYING;md5=751419260aa954499f7abaabaa882bbe"
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SRC_URI = "https://download.tuxfamily.org/chrony/chrony-${PV}.tar.gz \
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file://chrony.conf \
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file://chronyd \
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file://arm_eabi.patch \
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"
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SRC_URI:append:libc-musl = " \
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file://0001-Fix-compilation-with-musl.patch \
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"
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SRC_URI[sha256sum] = "ed76f2d3f9347ac6221a91ad4bd553dd0565ac188cd7490d0801d08f7171164c"
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DEPENDS = "pps-tools"
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# Note: Despite being built via './configure; make; make install',
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# chrony does not use GNU Autotools.
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inherit update-rc.d systemd
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# Add chronyd user if privdrop packageconfig is selected
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inherit ${@bb.utils.contains('PACKAGECONFIG', 'privdrop', 'useradd', '', d)}
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USERADD_PACKAGES = "${@bb.utils.contains('PACKAGECONFIG', 'privdrop', '${PN}', '', d)}"
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USERADD_PARAM:${PN} += "${@bb.utils.contains('PACKAGECONFIG', 'privdrop', '--system -d / -M --shell /bin/nologin chronyd;', '', d)}"
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# Configuration options:
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# - For command line editing support in chronyc, you may specify either
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# 'editline' or 'readline' but not both. editline is smaller, but
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# many systems already have readline for other purposes so you might want
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# to choose that instead. However, beware license incompatibility
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# since chrony is GPLv2 and readline versions after 6.0 are GPLv3+.
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# You can of course choose neither, but if you're that tight on space
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# consider dropping chronyc entirely (you can use it remotely with
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# appropriate chrony.conf options).
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# - Security-related:
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# - 'sechash' is omitted by default because it pulls in nss which is huge.
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# - 'privdrop' allows chronyd to run as non-root; would need changes to
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# chrony.conf and init script.
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# - 'scfilter' enables support for system call filtering, but requires the
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# kernel to have CONFIG_SECCOMP enabled.
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PACKAGECONFIG ??= "editline \
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${@bb.utils.filter('DISTRO_FEATURES', 'ipv6', d)} \
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"
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PACKAGECONFIG[readline] = "--without-editline,--without-readline,readline"
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PACKAGECONFIG[editline] = ",--without-editline,libedit"
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PACKAGECONFIG[sechash] = "--without-tomcrypt,--disable-sechash,nss"
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PACKAGECONFIG[privdrop] = "--with-libcap,--disable-privdrop --without-libcap,libcap"
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PACKAGECONFIG[scfilter] = "--enable-scfilter,--without-seccomp,libseccomp"
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PACKAGECONFIG[ipv6] = ",--disable-ipv6,"
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PACKAGECONFIG[nss] = "--with-nss,--without-nss,nss"
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PACKAGECONFIG[libcap] = "--with-libcap,--without-libcap,libcap"
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# --disable-static isn't supported by chrony's configure script.
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DISABLE_STATIC = ""
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do_configure() {
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./configure --sysconfdir=${sysconfdir} --bindir=${bindir} --sbindir=${sbindir} \
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--localstatedir=${localstatedir} --datarootdir=${datadir} \
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--with-ntp-era=$(shell date -d '1970-01-01 00:00:00+00:00' +'%s') \
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--with-pidfile=/run/chrony/chronyd.pid \
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--chronyrundir=/run/chrony \
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--host-system=Linux \
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${PACKAGECONFIG_CONFARGS}
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}
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do_install() {
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# Binaries
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install -d ${D}${bindir}
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install -m 0755 ${S}/chronyc ${D}${bindir}
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install -d ${D}${sbindir}
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install -m 0755 ${S}/chronyd ${D}${sbindir}
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# Config file
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install -d ${D}${sysconfdir}
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install -m 644 ${WORKDIR}/chrony.conf ${D}${sysconfdir}
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if ${@bb.utils.contains('PACKAGECONFIG', 'privdrop', 'true', 'false', d)}; then
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echo "# Define user to drop to after dropping root privileges" >> ${D}${sysconfdir}/chrony.conf
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echo "user chronyd" >> ${D}${sysconfdir}/chrony.conf
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fi
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# System V init script
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install -d ${D}${sysconfdir}/init.d
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install -m 755 ${WORKDIR}/chronyd ${D}${sysconfdir}/init.d
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# systemd unit configuration file
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install -d ${D}${systemd_unitdir}/system
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install -m 0644 ${S}/examples/chronyd.service ${D}${systemd_unitdir}/system/
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# Variable data (for drift and/or rtc file)
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install -d ${D}${localstatedir}/lib/chrony
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# Fix hard-coded paths in config files and init scripts
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sed -i -e 's!/var/!${localstatedir}/!g' -e 's!/etc/!${sysconfdir}/!g' \
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-e 's!/usr/sbin/!${sbindir}/!g' -e 's!/usr/bin/!${bindir}/!g' \
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${D}${sysconfdir}/chrony.conf \
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${D}${sysconfdir}/init.d/chronyd \
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${D}${systemd_unitdir}/system/chronyd.service
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sed -i 's!^PATH=.*!PATH=${base_sbindir}:${base_bindir}:${sbindir}:${bindir}!' ${D}${sysconfdir}/init.d/chronyd
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sed -i 's!^EnvironmentFile=.*!EnvironmentFile=-${sysconfdir}/default/chronyd!' ${D}${systemd_unitdir}/system/chronyd.service
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}
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FILES:${PN} = "${sbindir}/chronyd ${sysconfdir} ${localstatedir}/lib/chrony ${localstatedir}"
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CONFFILES:${PN} = "${sysconfdir}/chrony.conf"
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INITSCRIPT_NAME = "chronyd"
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INITSCRIPT_PARAMS = "defaults"
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SYSTEMD_PACKAGES = "${PN}"
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SYSTEMD_SERVICE:${PN} = "chronyd.service"
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# It's probably a bad idea to run chrony and another time daemon on
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# the same system. systemd includes the SNTP client 'timesyncd', which
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# will be disabled by chronyd.service, however it will remain on the rootfs
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# wasting 150 kB unless you put 'PACKAGECONFIG:remove:pn-systemd = "timesyncd"'
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# in a conf file or bbappend somewhere.
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RCONFLICTS:${PN} = "ntp ntimed"
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# Separate the client program into its own package
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PACKAGES =+ "chronyc"
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FILES:chronyc = "${bindir}/chronyc"
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