busybox

/* vi: set sw=4 ts=4: */

/*

 * adjtimex.c - read, and possibly modify, the Linux kernel 'timex' variables.

 *

 * Originally written: October 1997

 * Last hack: March 2001

 * Copyright 1997, 2000, 2001 Larry Doolittle <LRDoolittle@lbl.gov>

 *

 * busyboxed 20 March 2001, Larry Doolittle <ldoolitt@recycle.lbl.gov>

 *

 * Licensed under GPLv2 or later, see file LICENSE in this source tree.

 */

//config:config ADJTIMEX

//config:   bool "adjtimex (4.7 kb)"

//config:   default y

//config:   select PLATFORM_LINUX

//config:   help

//config:   Adjtimex reads and optionally sets adjustment parameters for

//config:   the Linux clock adjustment algorithm.

​

//applet:IF_ADJTIMEX(APPLET_NOFORK(adjtimex, adjtimex, BB_DIR_SBIN, BB_SUID_DROP, adjtimex))

​

//kbuild:lib-$(CONFIG_ADJTIMEX) += adjtimex.o

​

//usage:#define adjtimex_trivial_usage

//usage:       "[-q] [-o OFF] [-f FREQ] [-p TCONST] [-t TICK]"

//usage:#define adjtimex_full_usage "\n\n"

//usage:       "Read or set kernel time variables. See adjtimex(2)\n"

//usage:     "\n    -q  Quiet"

//usage:     "\n    -o OFF  Time offset, microseconds"

//usage:     "\n    -f FREQ Frequency adjust, integer kernel units (65536 is 1ppm)"

//usage:     "\n    -t TICK Microseconds per tick, usually 10000"

//usage:     "\n        (positive -t or -f values make clock run faster)"

//usage:     "\n    -p TCONST"

​

#include "libbb.h"

#ifdef __BIONIC__

# include <linux/timex.h>

#else

# include <sys/timex.h>

#endif

​

static const uint16_t statlist_bit[] ALIGN2 = {

    STA_PLL,

    STA_PPSFREQ,

    STA_PPSTIME,

    STA_FLL,

    STA_INS,

    STA_DEL,

    STA_UNSYNC,

    STA_FREQHOLD,

    STA_PPSSIGNAL,

    STA_PPSJITTER,

    STA_PPSWANDER,

    STA_PPSERROR,

    STA_CLOCKERR,

    0

};

static const char statlist_name[] ALIGN1 =

    "PLL"       "\0"

    "PPSFREQ"   "\0"

    "PPSTIME"   "\0"

    "FFL"       "\0"