1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * adjtimex.c - read, and possibly modify, the Linux kernel `timex' variables.
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4 | *
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5 | * Originally written: October 1997
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6 | * Last hack: March 2001
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7 | * Copyright 1997, 2000, 2001 Larry Doolittle <LRDoolittle@lbl.gov>
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8 | *
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9 | * busyboxed 20 March 2001, Larry Doolittle <ldoolitt@recycle.lbl.gov>
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10 | *
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11 | * Licensed under GPLv2 or later, see file License in this tarball for details.
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12 | */
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13 |
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14 | #include "busybox.h"
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15 | #include <stdio.h>
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16 | #include <sys/types.h>
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17 | #include <stdlib.h>
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18 | #include <unistd.h>
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19 | #include <sys/timex.h>
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20 |
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21 | static const struct {int bit; const char *name;} statlist[] = {
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22 | { STA_PLL, "PLL" },
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23 | { STA_PPSFREQ, "PPSFREQ" },
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24 | { STA_PPSTIME, "PPSTIME" },
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25 | { STA_FLL, "FFL" },
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26 | { STA_INS, "INS" },
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27 | { STA_DEL, "DEL" },
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28 | { STA_UNSYNC, "UNSYNC" },
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29 | { STA_FREQHOLD, "FREQHOLD" },
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30 | { STA_PPSSIGNAL, "PPSSIGNAL" },
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31 | { STA_PPSJITTER, "PPSJITTER" },
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32 | { STA_PPSWANDER, "PPSWANDER" },
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33 | { STA_PPSERROR, "PPSERROR" },
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34 | { STA_CLOCKERR, "CLOCKERR" },
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35 | { 0, NULL } };
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36 |
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37 | static const char * const ret_code_descript[] = {
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38 | "clock synchronized",
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39 | "insert leap second",
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40 | "delete leap second",
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41 | "leap second in progress",
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42 | "leap second has occurred",
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43 | "clock not synchronized" };
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44 |
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45 | int adjtimex_main(int argc, char **argv)
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46 | {
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47 | struct timex txc;
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48 | int quiet=0;
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49 | int c, i, ret, sep;
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50 | const char *descript;
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51 | txc.modes=0;
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52 | for (;;) {
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53 | c = getopt( argc, argv, "qo:f:p:t:");
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54 | if (c == EOF) break;
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55 | switch (c) {
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56 | case 'q':
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57 | quiet=1;
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58 | break;
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59 | case 'o':
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60 | txc.offset = atoi(optarg);
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61 | txc.modes |= ADJ_OFFSET_SINGLESHOT;
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62 | break;
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63 | case 'f':
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64 | txc.freq = atoi(optarg);
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65 | txc.modes |= ADJ_FREQUENCY;
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66 | break;
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67 | case 'p':
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68 | txc.constant = atoi(optarg);
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69 | txc.modes |= ADJ_TIMECONST;
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70 | break;
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71 | case 't':
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72 | txc.tick = atoi(optarg);
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73 | txc.modes |= ADJ_TICK;
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74 | break;
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75 | default:
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76 | bb_show_usage();
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77 | exit(1);
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78 | }
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79 | }
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80 | if (argc != optind) { /* no valid non-option parameters */
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81 | bb_show_usage();
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82 | exit(1);
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83 | }
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84 |
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85 | ret = adjtimex(&txc);
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86 |
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87 | if (ret < 0) perror("adjtimex");
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88 |
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89 | if (!quiet && ret>=0) {
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90 | printf(
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91 | " mode: %d\n"
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92 | "-o offset: %ld\n"
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93 | "-f frequency: %ld\n"
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94 | " maxerror: %ld\n"
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95 | " esterror: %ld\n"
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96 | " status: %d ( ",
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97 | txc.modes, txc.offset, txc.freq, txc.maxerror,
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98 | txc.esterror, txc.status);
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99 |
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100 | /* representative output of next code fragment:
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101 | "PLL | PPSTIME" */
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102 | sep=0;
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103 | for (i=0; statlist[i].name; i++) {
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104 | if (txc.status & statlist[i].bit) {
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105 | if (sep) fputs(" | ",stdout);
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106 | fputs(statlist[i].name,stdout);
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107 | sep=1;
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108 | }
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109 | }
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110 |
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111 | descript = "error";
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112 | if (ret >= 0 && ret <= 5) descript = ret_code_descript[ret];
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113 | printf(" )\n"
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114 | "-p timeconstant: %ld\n"
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115 | " precision: %ld\n"
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116 | " tolerance: %ld\n"
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117 | "-t tick: %ld\n"
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118 | " time.tv_sec: %ld\n"
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119 | " time.tv_usec: %ld\n"
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120 | " return value: %d (%s)\n",
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121 | txc.constant,
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122 | txc.precision, txc.tolerance, txc.tick,
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123 | (long)txc.time.tv_sec, (long)txc.time.tv_usec, ret, descript);
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124 | }
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125 | return (ret<0);
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126 | }
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