## SECTION=networking menuconfig NTP tristate prompt "ntp " select OPENSSL if NTP_CRYPTO select ROOTFS_VAR_CACHE if NTP_NTPD select LIBC_M select LIBC_RT select GCCLIBS_GCC_S select LIBMD help Build the standard NTP Daemon Process and supplementary programs. This conflicts with BSD openntpd. # ----- Compile Options if NTP comment "Compile Options" config NTP_CLOCKCTL bool prompt "Use /dev/clockctl for non-root time control" help The clockctl device introduces alternative entry points to these system calls, through a special device file typically named /dev/clockctl The access control is made upon this file: if a user can write to it, then the user is allowed to change system time. The goal is to enable daemons such as ntpd to run in a chroot jail and hence to enhance the security of the system. config NTP_DEBUGGING bool prompt "include debugging code" help Include a lot of debugging code. config NTP_DST_MINUTES int prompt "minutes per DST adjustment" default 60 help Enter here how many minutes should be added when switching to daylight saving time. config NTP_BANCOMM bool prompt "Datum/Bancomm bc635/VME interface" help FIXME: This item needs to be documented config NTP_GPSVME bool prompt "TrueTime GPS receiver/VME interface" help FIXME: This item needs to be documented config NTP_KMEM bool prompt "read /dev/kmem for tick and/or tickadj" help This feature seems only required on non Linux based systems config NTP_ACCURATE_ADJTIME bool prompt "the adjtime () call is accurate" help The adjtime() call is accurate. config NTP_TICK_FORCE bool prompt "force a value for 'tick'" help FIXME: This item needs to be documented config NTP_TICK int prompt "value for 'tick'" default 1 depends on NTP_TICK_FORCE help FIXME: This item needs to be documented config NTP_TICKADJ_FORCE bool prompt "force a value for 'tickadj'" help FIXME: This item needs to be documented config NTP_TICKADJ bool prompt "value for 'tickadj'" default 1 depends on NTP_TICKADJ_FORCE help FIXME: This item needs to be documented config NTP_SIMULATOR bool prompt "build/install the NTPD simulator" help FIXME: This item needs to be documented config NTP_UDP_WILDCARD bool prompt "use UDP wildcard delivery" help FIXME: This item needs to be documented config NTP_SLEW_ALWAYS bool prompt "always slew the time" help Slew the clock back into line by making gradual adjustments to the clock over a couple of minutes. (The slew rate of typical Unix kernels is limited to 0.5 ms/s.) config NTP_STEP_SLEW bool prompt "step and slew the time" help Slew the clock back into line by making step adjustments to the clock over a couple of minutes. config NTP_NTPDATE_STEP bool prompt "ntpdate should step the time" help FIXME: This item needs to be documented config NTP_HOURLY_TODR_SYNC bool prompt "sync TODR hourly" help If we should sync TODR hourly (the Solaris hardware clock). When unsure, say no here. config NTP_KERNEL_FLL_BUG bool prompt "avoid a kernel FLL bug" help If we should avoid a (Solaris) kernel FLL bug. config NTP_IRIG_SAWTOOTH bool prompt "enable the IRIG sawtooth filter" help The Sun kernel driver has a sawtooth modulation with amplitude over 5 ms peak-peak and period 5.5 s. The crafty IRIG driver uses a transverse filter to remove the modulation and something called a botttom-fisher to remove incidental positive spikes especially prevalent with Sun Blade 1000 and possibly other systems. config NTP_NIST bool prompt "enable the NIST lockclock scheme" help The NIST lockclock program synchronizes the local clock via a telephone modem and the NIST Automated Computer Time Service (ACTS), or the Digital Time Synchronization Service (DTSS), which runs on DCE machines. config NTP_CRYPTO bool prompt "use openssl" help FIXME: This item needs to be documented config NTP_SNTP bool prompt "build SNTP" help Simple Network Time Protocol is a subset of the Network Time Protocol (NTP). SNTP can be used when the ultimate performance of a full NTP implementation based on RFC 1305 is neither needed nor justified. It is strongly recommended that SNTP be used only at the extremities of the synchronization subnet. config NTP_ARLIB bool prompt "compile the async resolver library" help FIXME: This item needs to be documented comment "Clock drivers" config NTP_ALL_CLOCK_DRIVERS bool prompt "build all clock drivers" default y help Disabling this entry will only build a set of selected clock drivers. Else all clock drivers are included into the ntpd. source "generated/networking_ntp.in" # ---------- Install Options comment "Install Options" depends on NTP config NTP_NTPDATE bool prompt "install ntpdate" depends on NTP help ntpdate sets the local date and time by polling the Network Time Protocol (NTP) server(s) given as the server arguments to determine the correct time. config NTP_NTPD bool prompt "install ntpd" depends on NTP depends on !BUSYBOX_NTPD || ALLYES help The ntpd program is an operating system daemon which sets and maintains the system time of day in synchronism with Internet standard time servers. comment "BusyBox' ntpd is selected" depends on BUSYBOX_NTPD config NTP_NTPD_STARTSCRIPT bool default y depends on NTP_NTPD prompt "install /etc/init.d/ntp-server" config NTP_NTPD_SYSTEMD_UNIT bool default y depends on NTP_NTPD && SYSTEMD prompt "install systemd service file" config NTP_NTPDC bool prompt "install ntpdc" depends on NTP help ntpdc is used to query the ntpd daemon about its current state and to request changes in that state. config NTP_NTPC_STARTSCRIPT bool default y depends on NTP_NTPDC prompt "install /etc/init.d/ntp-client" config NTP_NTPQ bool prompt "install ntpq" depends on NTP help The ntpq utility program is used to monitor NTP daemon ntpd operations and determine performance. endif comment "NTP conflicts with OpenNTPD" depends on NTP && OPENNTPD