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/* 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 tarball for details.
*/
#include "busybox.h"
#include <stdio.h>
#include <sys/types.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/timex.h>
static const struct {int bit; const char *name;} statlist[] = {
{ STA_PLL, "PLL" },
{ STA_PPSFREQ, "PPSFREQ" },
{ STA_PPSTIME, "PPSTIME" },
{ STA_FLL, "FFL" },
{ STA_INS, "INS" },
{ STA_DEL, "DEL" },
{ STA_UNSYNC, "UNSYNC" },
{ STA_FREQHOLD, "FREQHOLD" },
{ STA_PPSSIGNAL, "PPSSIGNAL" },
{ STA_PPSJITTER, "PPSJITTER" },
{ STA_PPSWANDER, "PPSWANDER" },
{ STA_PPSERROR, "PPSERROR" },
{ STA_CLOCKERR, "CLOCKERR" },
{ 0, NULL } };
static const char * const ret_code_descript[] = {
"clock synchronized",
"insert leap second",
"delete leap second",
"leap second in progress",
"leap second has occurred",
"clock not synchronized" };
int adjtimex_main(int argc, char **argv)
{
enum {
OPT_quiet = 0x1
};
unsigned long opt;
char *opt_o, *opt_f, *opt_p, *opt_t;
struct timex txc;
int i, ret, sep;
const char *descript;
txc.modes=0;
opt = bb_getopt_ulflags(argc, argv, "qo:f:p:t:",
&opt_o, &opt_f, &opt_p, &opt_t);
//if (opt & 0x1) // -q
if (opt & 0x2) { // -o
txc.offset = atoi(opt_o);
txc.modes |= ADJ_OFFSET_SINGLESHOT;
}
if (opt & 0x4) { // -f
txc.freq = atoi(opt_f);
txc.modes |= ADJ_FREQUENCY;
}
if (opt & 0x8) { // -p
txc.constant = atoi(opt_p);
txc.modes |= ADJ_TIMECONST;
}
if (opt & 0x10) { // -t
txc.tick = atoi(opt_t);
txc.modes |= ADJ_TICK;
}
if (argc != optind) { /* no valid non-option parameters */
bb_show_usage();
}
ret = adjtimex(&txc);
if (ret < 0) perror("adjtimex");
if (!(opt & OPT_quiet) && ret>=0) {
printf(
" mode: %d\n"
"-o offset: %ld\n"
"-f frequency: %ld\n"
" maxerror: %ld\n"
" esterror: %ld\n"
" status: %d ( ",
txc.modes, txc.offset, txc.freq, txc.maxerror,
txc.esterror, txc.status);
/* representative output of next code fragment:
"PLL | PPSTIME" */
sep=0;
for (i=0; statlist[i].name; i++) {
if (txc.status & statlist[i].bit) {
if (sep) fputs(" | ",stdout);
fputs(statlist[i].name,stdout);
sep=1;
}
}
descript = "error";
if (ret >= 0 && ret <= 5) descript = ret_code_descript[ret];
printf(" )\n"
"-p timeconstant: %ld\n"
" precision: %ld\n"
" tolerance: %ld\n"
"-t tick: %ld\n"
" time.tv_sec: %ld\n"
" time.tv_usec: %ld\n"
" return value: %d (%s)\n",
txc.constant,
txc.precision, txc.tolerance, txc.tick,
(long)txc.time.tv_sec, (long)txc.time.tv_usec, ret, descript);
}
return (ret<0);
}
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