5e08d92947
This patch adds the installation of a startup script if the sntp utility is selected as an option. The utility is design to do a one time step/slew adjustment of the system time (similar to the ntpdate tool http://support.ntp.org/bin/view/Dev/DeprecatingNtpdate). One nice benefit over ntpdate is that sntp can run while ntpd is still running. However, ntpd may still need to be restarted if the time step was large enough. The script provides the ability to override the arguments as part of a /etc/defaults/sntp file. On a local LAN, the initial large step adjustment took less then one second to be retrieved and system time updated. If a user already has a RTC maintaining the time and the system was powered off for a long period of time, the script assumes a slew adjustment when +/- 128ms, rather then a time step(jump). This could be further tuned by a user with the /etc/defaults/sntp configuration file. One NTP pool server is being set as sntp uses all of the servers provided when the DNS is resolved as servers to attempt to retrieve time from before timing out. It looks like currently that is 4 servers per *pool.ntp.org hostname. Cc: Oscar Gomez Fuente <oscargomezf@gmail.com> Signed-off-by: Matthew Weber <matthew.weber@rockwellcollins.com> Tested-by: Oscar Gomez Fuente <oscargomezf@gmail.com> Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
102 lines
2.5 KiB
Plaintext
102 lines
2.5 KiB
Plaintext
config BR2_PACKAGE_NTP
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bool "ntp"
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select BR2_PACKAGE_LIBEVENT
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help
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Network Time Protocol suite/programs.
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Provides things like ntpd, ntpdate, ntpq, etc...
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http://www.ntp.org/
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if BR2_PACKAGE_NTP
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config BR2_PACKAGE_NTP_SNTP
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bool "sntp"
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help
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Simple network time protocol program (a replacement
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for the ntpdate tool)
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A script is installed as S48sntp which will retrieve and
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step the time if there is a large difference before ntpd
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takes over the necessary slew adjustments in S49ntp.
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config BR2_PACKAGE_NTP_NTP_KEYGEN
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bool "ntp-keygen"
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help
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Create a NTP host key
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config BR2_PACKAGE_NTP_NTP_SHM_CLK
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bool "SHM clock support"
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help
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Compile ntp with support for a SHM clock attached through
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shared memory.
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config BR2_PACKAGE_NTP_NTP_WAIT
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bool "ntp-wait"
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depends on BR2_PACKAGE_PERL
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help
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ntp-wait waits until the locally running ntpd is in state 4
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(synchronized). This could be useful at boot time, to delay
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the boot sequence until after "ntpd -g" has set the time.
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config BR2_PACKAGE_NTP_NTPD
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bool "ntpd"
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default y
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help
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ntpd is the time synchronization daemon keeping your local
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system date and time in sync and optionally serving time and
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date information on the network via the NTP protocol.
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config BR2_PACKAGE_NTP_NTPD_ATOM_PPS
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bool "PPS support"
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depends on BR2_PACKAGE_NTP_NTPD
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select BR2_PACKAGE_PPS_TOOLS
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help
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Compile ntpd with the ability to use an ATOM PPS source.
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config BR2_PACKAGE_NTP_NTPDATE
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bool "ntpdate"
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help
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The ntpdate utility program is used to set the local date
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and time from an NTP server given as an argument.
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config BR2_PACKAGE_NTP_NTPDC
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bool "ntpdc"
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help
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The ntpdc utility program is used to query an NTP daemon about
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its current state and to request changes in that state.
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config BR2_PACKAGE_NTP_NTPQ
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bool "ntpq"
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help
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The ntpq utility program is used to query NTP servers
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requesting information about current state and/or changes in
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that state.
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config BR2_PACKAGE_NTP_NTPSNMPD
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bool "ntpsnmpd"
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depends on BR2_USE_MMU # netsnmp fork()
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select BR2_PACKAGE_NETSNMP
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help
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Install ntpsnmpd NTP SNMP MIB agent.
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config BR2_PACKAGE_NTP_NTPTIME
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bool "ntptime"
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help
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The ntptime utility program is used to read and set kernel
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time variables.
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config BR2_PACKAGE_NTP_NTPTRACE
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bool "ntptrace"
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depends on BR2_PACKAGE_PERL
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help
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ntptrace is a perl script that uses the ntpq utility program
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to follow the chain of NTP servers from a given host back to
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the primary time source
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config BR2_PACKAGE_NTP_TICKADJ
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bool "tickadj"
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help
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set time-related kernel variables
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endif
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