include = <<- _EOF_
#ifdef __windows
extern int atoi(const char *);
#else
# include <stdlib.h>
#endif
_EOF_;
flag = {
name = ipv4;
value = 4;
flags-cant = ipv6;
descrip = "Force IPv4 DNS name resolution";
doc = <<- _EndOfDoc_
Force DNS resolution of following host names on the command line
to the IPv4 namespace.
_EndOfDoc_;
};
flag = {
name = ipv6;
value = 6;
flags-cant = ipv4;
descrip = "Force IPv6 DNS name resolution";
doc = <<- _EndOfDoc_
Force DNS resolution of following host names on the command line
to the IPv6 namespace.
_EndOfDoc_;
};
flag = {
name = authreq;
value = a;
descrip = "Require crypto authentication";
flags-cant = authnoreq;
doc = <<- _EndOfDoc_
Require cryptographic authentication for broadcast client,
multicast client and symmetric passive associations.
This is the default.
_EndOfDoc_;
};
flag = {
name = authnoreq;
value = A;
descrip = "Do not require crypto authentication";
flags-cant = authreq;
doc = <<- _EndOfDoc_
Do not require cryptographic authentication for broadcast client,
multicast client and symmetric passive associations.
This is almost never a good idea.
_EndOfDoc_;
};
flag = {
name = bcastsync;
value = b;
descrip = "Allow us to sync to broadcast servers";
doc = <<- _EndOfDoc_
_EndOfDoc_;
};
flag = {
name = configfile;
value = c;
arg-type = string;
descrip = "configuration file name";
doc = <<- _EndOfDoc_
The name and path of the configuration file,
@file{/etc/ntp.conf}
by default.
_EndOfDoc_;
};
#include debug-opt.def
flag = {
name = driftfile;
value = f;
arg-type = string;
descrip = "frequency drift file name";
doc = <<- _EndOfDoc_
The name and path of the frequency file,
@file{/etc/ntp.drift}
by default.
This is the same operation as the
@code{driftfile} @kbd{driftfile}
configuration specification in the
@file{/etc/ntp.conf}
file.
_EndOfDoc_;
};
flag = {
name = panicgate;
value = g;
max = NOLIMIT;
descrip = "Allow the first adjustment to be Big";
doc = <<- _EndOfDoc_
Normally,
@code{ntpd}
exits with a message to the system log if the offset exceeds the panic threshold, which is 1000 s by default. This option allows the time to be set to any value without restriction; however, this can happen only once. If the threshold is exceeded after that,
@code{ntpd}
will exit with a message to the system log. This option can be used with the
@code{-q}
and
@code{-x}
options.
See the
@code{tinker}
configuration file directive for other options.
_EndOfDoc_;
};
flag = {
name = force_step_once;
value = G;
descrip = "Step any initial offset correction.";
doc = <<- _EndOfDoc_
Normally,
@code{ntpd}
steps the time if the time offset exceeds the step threshold,
which is 128 ms by default, and otherwise slews the time.
This option forces the initial offset correction to be stepped,
so the highest time accuracy can be achieved quickly.
However, this may also cause the time to be stepped back
so this option must not be used if
applications requiring monotonic time are running.
See the @code{tinker} configuration file directive for other options.
_EndOfDoc_;
};
flag = {
ifdef = HAVE_DROPROOT;
name = jaildir;
value = i;
arg-type = string;
descrip = "Jail directory";
omitted-usage = "built without --enable-clockctl or --enable-linuxcaps or --enable-solarisprivs";
doc = <<- _EndOfDoc_
Chroot the server to the directory
@kbd{jaildir}
.
This option also implies that the server attempts to drop root privileges at startup.
You may need to also specify a
@code{-u}
option.
This option is only available if the OS supports adjusting the clock
without full root privileges.
This option is supported under NetBSD (configure with
@code{--enable-clockctl}) or Linux (configure with
@code{--enable-linuxcaps}) or Solaris (configure with @code{--enable-solarisprivs}).
_EndOfDoc_;
};
flag = {
name = interface;
value = I;
arg-type = string;
descrip = "Listen on an interface name or address";
max = NOLIMIT;
arg-name = iface;
stack-arg;
doc = <<- _EndOfDoc_
Open the network address given, or all the addresses associated with the
given interface name. This option may appear multiple times. This option
also implies not opening other addresses, except wildcard and localhost.
This option is deprecated. Please consider using the configuration file
@code{interface} command, which is more versatile.
_EndOfDoc_;
};
flag = {
name = keyfile;
value = k;
arg-type = string;
descrip = "path to symmetric keys";
doc = <<- _EndOfDoc_
Specify the name and path of the symmetric key file.
@file{/etc/ntp.keys}
is the default.
This is the same operation as the
@code{keys} @kbd{keyfile}
configuration file directive.
_EndOfDoc_;
};
flag = {
name = logfile;
value = l;
arg-type = string;
descrip = "path to the log file";
doc = <<- _EndOfDoc_
Specify the name and path of the log file.
The default is the system log file.
This is the same operation as the
@code{logfile} @kbd{logfile}
configuration file directive.
_EndOfDoc_;
};
flag = {
name = novirtualips;
value = L;
descrip = "Do not listen to virtual interfaces";
doc = <<- _EndOfDoc_
Do not listen to virtual interfaces, defined as those with
names containing a colon. This option is deprecated. Please
consider using the configuration file @code{interface} command, which
is more versatile.
_EndOfDoc_;
};
flag = {
ifdef = SYS_WINNT;
name = modifymmtimer;
value = M;
descrip = "Modify Multimedia Timer (Windows only)";
doc = <<- _EndOfDoc_
Set the Windows Multimedia Timer to highest resolution. This
ensures the resolution does not change while ntpd is running,
avoiding timekeeping glitches associated with changes.
_EndOfDoc_;
};
flag = {
name = nofork;
value = n;
flags-cant = wait-sync;
descrip = "Do not fork";
doc = <<- _EndOfDoc_
_EndOfDoc_;
};
flag = {
name = nice;
value = N;
descrip = "Run at high priority";
doc = <<- _EndOfDoc_
To the extent permitted by the operating system, run
@code{ntpd}
at the highest priority.
_EndOfDoc_;
};
flag = {
name = pidfile;
value = p;
arg-type = string;
descrip = "path to the PID file";
doc = <<- _EndOfDoc_
Specify the name and path of the file used to record
@code{ntpd}'s
process ID.
This is the same operation as the
@code{pidfile} @kbd{pidfile}
configuration file directive.
_EndOfDoc_;
};
flag = {
name = priority;
value = P;
arg-type = number;
descrip = "Process priority";
doc = <<- _EndOfDoc_
To the extent permitted by the operating system, run
@code{ntpd}
at the specified
@code{sched_setscheduler(SCHED_FIFO)}
priority.
_EndOfDoc_;
};
flag = {
name = quit;
value = q;
flags-cant = saveconfigquit;
flags-cant = wait-sync;
descrip = "Set the time and quit";
doc = <<- _EndOfDoc_
@code{ntpd}
will not daemonize and will exit after the clock is first
synchronized. This behavior mimics that of the
@code{ntpdate}
program, which will soon be replaced with a shell script.
The
@code{-g}
and
@code{-x}
options can be used with this option.
Note: The kernel time discipline is disabled with this option.
_EndOfDoc_;
};
flag = {
name = propagationdelay;
value = r;
arg-type = string;
descrip = "Broadcast/propagation delay";
doc = <<- _EndOfDoc_
Specify the default propagation delay from the broadcast/multicast server to this client. This is necessary only if the delay cannot be computed automatically by the protocol.
_EndOfDoc_;
};
flag = {
ifdef = SAVECONFIG;
name = saveconfigquit;
arg-type = string;
flags-cant = quit;
flags-cant = wait-sync;
descrip = "Save parsed configuration and quit";
doc = <<- _EndOfDoc_
Cause @code{ntpd} to parse its startup configuration file and save an
equivalent to the given filename and exit. This option was
designed for automated testing.
_EndOfDoc_;
};
flag = {
name = statsdir;
value = s;
arg-type = string;
descrip = "Statistics file location";
doc = <<- _EndOfDoc_
Specify the directory path for files created by the statistics facility.
This is the same operation as the
@code{statsdir} @kbd{statsdir}
configuration file directive.
_EndOfDoc_;
};
flag = {
name = trustedkey;
value = t;
arg-type = string;
descrip = "Trusted key number";
max = NOLIMIT;
arg-name = tkey;
stack-arg;
doc = <<- _EndOfDoc_
Add the specified key number to the trusted key list.
_EndOfDoc_;
};
flag = {
ifdef = HAVE_DROPROOT;
name = user;
value = u;
arg-type = string;
descrip = "Run as userid (or userid:groupid)";
omitted-usage = "built without --enable-clockctl or --enable-linuxcaps or --enable-solarisprivs";
doc = <<- _EndOfDoc_
Specify a user, and optionally a group, to switch to.
This option is only available if the OS supports adjusting the clock
without full root privileges.
This option is supported under NetBSD (configure with
@code{--enable-clockctl}) or Linux (configure with
@code{--enable-linuxcaps}) or Solaris (configure with @code{--enable-solarisprivs}).
_EndOfDoc_;
};
flag = {
name = updateinterval;
value = U;
arg-type = number;
descrip = "interval in seconds between scans for new or dropped interfaces";
doc = <<- _EndOfDoc_
Give the time in seconds between two scans for new or dropped interfaces.
For systems with routing socket support the scans will be performed shortly after the interface change
has been detected by the system.
Use 0 to disable scanning. 60 seconds is the minimum time between scans.
_EndOfDoc_;
};
flag = {
name = var;
/* value = v; Bug 817 */
arg-type = string;
descrip = "make ARG an ntp variable (RW)";
max = NOLIMIT;
arg-name = nvar;
stack-arg;
doc = <<- _EndOfDoc_
_EndOfDoc_;
};
flag = {
name = dvar;
/* value = V; Bug 817 */
arg-type = string;
descrip = "make ARG an ntp variable (RW|DEF)";
max = NOLIMIT;
arg-name = ndvar;
stack-arg;
doc = <<- _EndOfDoc_
_EndOfDoc_;
};
flag = {
ifdef = HAVE_WORKING_FORK;
name = wait-sync;
value = w;
arg-type = number;
flags-cant = nofork;
flags-cant = quit;
flags-cant = saveconfigquit;
descrip = "Seconds to wait for first clock sync";
doc = <<- _EndOfDoc_
If greater than zero, alters @code{ntpd}'s behavior when forking to
daemonize. Instead of exiting with status 0 immediately after
the fork, the parent waits up to the specified number of
seconds for the child to first synchronize the clock. The exit
status is zero (success) if the clock was synchronized,
otherwise it is @code{ETIMEDOUT}.
This provides the option for a script starting @code{ntpd} to easily
wait for the first set of the clock before proceeding.
_EndOfDoc_;
/*
** XXX: is it "first set" or is it more? If it's only "first set" then
** that's not the same as SYNC.
*/
};
flag = {
name = slew;
value = x;
descrip = "Slew up to 600 seconds";
doc = <<- _EndOfDoc_
Normally, the time is slewed if the offset is less than the step threshold, which is 128 ms by default, and stepped if above the threshold.
This option sets the threshold to 600 s, which is well within the accuracy window to set the clock manually.
Note: Since the slew rate of typical Unix kernels is limited to 0.5 ms/s, each second of adjustment requires an amortization interval of 2000 s.
Thus, an adjustment as much as 600 s will take almost 14 days to complete.
This option can be used with the
@code{-g}
and
@code{-q}
options.
See the
@code{tinker}
configuration file directive for other options.
Note: The kernel time discipline is disabled with this option.
_EndOfDoc_;
};
flag = {
ifdef = SYS_WINNT;
name = usepcc;
descrip = "Use CPU cycle counter (Windows only)";
doc = <<- _EndOfDoc_
Attempt to substitute the CPU counter for @code{QueryPerformanceCounter}.
The CPU counter and @code{QueryPerformanceCounter} are compared, and if
they have the same frequency, the CPU counter (RDTSC on x86) is
used directly, saving the overhead of a system call.
_EndOfDoc_;
};
flag = {
ifdef = SYS_WINNT;
name = pccfreq;
arg-type = string;
descrip = "Force CPU cycle counter use (Windows only)";
doc = <<- _EndOfDoc_
Force substitution the CPU counter for @code{QueryPerformanceCounter}.
The CPU counter (RDTSC on x86) is used unconditionally with the
given frequency (in Hz).
_EndOfDoc_;
};
flag = {
ifdef = HAVE_DNSREGISTRATION;
name = mdns;
value = m;
descrip = "Register with mDNS as a NTP server";
doc = <<- _EndOfDoc_
Registers as an NTP server with the local mDNS server which allows
the server to be discovered via mDNS client lookup.
_EndOfDoc_;
};
