source: MondoRescue/branches/2.2.5/mindi-busybox/miscutils/adjtimex.c@ 1765

/* 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 "libbb.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);
int adjtimex_main(int argc, char **argv)
{
    enum {
        OPT_quiet = 0x1
    };
    unsigned opt;
    char *opt_o, *opt_f, *opt_p, *opt_t;
    struct timex txc;
    int i, ret, sep;
    const char *descript;
    txc.modes=0;

    opt = getopt32(argv, "qo:f:p:t:",
            &opt_o, &opt_f, &opt_p, &opt_t);
    //if (opt & 0x1) // -q
    if (opt & 0x2) { // -o
        txc.offset = xatol(opt_o);
        txc.modes |= ADJ_OFFSET_SINGLESHOT;
    }
    if (opt & 0x4) { // -f
        txc.freq = xatol(opt_f);
        txc.modes |= ADJ_FREQUENCY;
    }
    if (opt & 0x8) { // -p
        txc.constant = xatol(opt_p);
        txc.modes |= ADJ_TIMECONST;
    }
    if (opt & 0x10) { // -t
        txc.tick = xatol(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);
}