mirror of
https://git.busybox.net/busybox.git
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127 lines
3.0 KiB
C
127 lines
3.0 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* adjtimex.c - read, and possibly modify, the Linux kernel `timex' variables.
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*
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* Originally written: October 1997
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* Last hack: March 2001
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* Copyright 1997, 2000, 2001 Larry Doolittle <LRDoolittle@lbl.gov>
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*
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* busyboxed 20 March 2001, Larry Doolittle <ldoolitt@recycle.lbl.gov>
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*
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* Licensed under GPLv2 or later, see file License in this tarball for details.
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*/
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#include "busybox.h"
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#include <stdio.h>
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#include <sys/types.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/timex.h>
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static const struct {int bit; const char *name;} statlist[] = {
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{ STA_PLL, "PLL" },
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{ STA_PPSFREQ, "PPSFREQ" },
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{ STA_PPSTIME, "PPSTIME" },
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{ STA_FLL, "FFL" },
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{ STA_INS, "INS" },
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{ STA_DEL, "DEL" },
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{ STA_UNSYNC, "UNSYNC" },
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{ STA_FREQHOLD, "FREQHOLD" },
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{ STA_PPSSIGNAL, "PPSSIGNAL" },
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{ STA_PPSJITTER, "PPSJITTER" },
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{ STA_PPSWANDER, "PPSWANDER" },
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{ STA_PPSERROR, "PPSERROR" },
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{ STA_CLOCKERR, "CLOCKERR" },
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{ 0, NULL } };
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static const char * const ret_code_descript[] = {
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"clock synchronized",
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"insert leap second",
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"delete leap second",
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"leap second in progress",
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"leap second has occurred",
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"clock not synchronized" };
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int adjtimex_main(int argc, char **argv)
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{
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struct timex txc;
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int quiet=0;
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int c, i, ret, sep;
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const char *descript;
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txc.modes=0;
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for (;;) {
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c = getopt( argc, argv, "qo:f:p:t:");
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if (c == EOF) break;
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switch (c) {
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case 'q':
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quiet=1;
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break;
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case 'o':
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txc.offset = atoi(optarg);
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txc.modes |= ADJ_OFFSET_SINGLESHOT;
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break;
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case 'f':
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txc.freq = atoi(optarg);
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txc.modes |= ADJ_FREQUENCY;
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break;
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case 'p':
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txc.constant = atoi(optarg);
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txc.modes |= ADJ_TIMECONST;
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break;
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case 't':
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txc.tick = atoi(optarg);
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txc.modes |= ADJ_TICK;
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break;
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default:
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bb_show_usage();
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exit(1);
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}
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}
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if (argc != optind) { /* no valid non-option parameters */
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bb_show_usage();
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exit(1);
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}
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ret = adjtimex(&txc);
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if (ret < 0) perror("adjtimex");
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if (!quiet && ret>=0) {
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printf(
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" mode: %d\n"
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"-o offset: %ld\n"
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"-f frequency: %ld\n"
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" maxerror: %ld\n"
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" esterror: %ld\n"
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" status: %d ( ",
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txc.modes, txc.offset, txc.freq, txc.maxerror,
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txc.esterror, txc.status);
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/* representative output of next code fragment:
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"PLL | PPSTIME" */
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sep=0;
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for (i=0; statlist[i].name; i++) {
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if (txc.status & statlist[i].bit) {
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if (sep) fputs(" | ",stdout);
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fputs(statlist[i].name,stdout);
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sep=1;
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}
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}
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descript = "error";
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if (ret >= 0 && ret <= 5) descript = ret_code_descript[ret];
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printf(" )\n"
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"-p timeconstant: %ld\n"
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" precision: %ld\n"
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" tolerance: %ld\n"
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"-t tick: %ld\n"
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" time.tv_sec: %ld\n"
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" time.tv_usec: %ld\n"
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" return value: %d (%s)\n",
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txc.constant,
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txc.precision, txc.tolerance, txc.tick,
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(long)txc.time.tv_sec, (long)txc.time.tv_usec, ret, descript);
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}
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return (ret<0);
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}
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