source: MondoRescue/branches/2.2.2/mindi-busybox/miscutils/adjtimex.c@ 1247

/* 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)
{
    struct timex txc;
    int quiet=0;
    int c, i, ret, sep;
    const char *descript;
    txc.modes=0;
    for (;;) {
        c = getopt( argc, argv, "qo:f:p:t:");
        if (c == EOF) break;
        switch (c) {
            case 'q':
                quiet=1;
                break;
            case 'o':
                txc.offset = atoi(optarg);
                txc.modes |= ADJ_OFFSET_SINGLESHOT;
                break;
            case 'f':
                txc.freq = atoi(optarg);
                txc.modes |= ADJ_FREQUENCY;
                break;
            case 'p':
                txc.constant = atoi(optarg);
                txc.modes |= ADJ_TIMECONST;
                break;
            case 't':
                txc.tick = atoi(optarg);
                txc.modes |= ADJ_TICK;
                break;
            default:
                bb_show_usage();
                exit(1);
        }
    }
    if (argc != optind) { /* no valid non-option parameters */
        bb_show_usage();
        exit(1);
    }

    ret = adjtimex(&txc);

    if (ret < 0) perror("adjtimex");

    if (!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);
}