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 source tree.
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12 | */
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13 |
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14 | #include "libbb.h"
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15 | #include <sys/timex.h>
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16 |
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17 | static const uint16_t statlist_bit[] = {
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18 | STA_PLL,
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19 | STA_PPSFREQ,
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20 | STA_PPSTIME,
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21 | STA_FLL,
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22 | STA_INS,
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23 | STA_DEL,
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24 | STA_UNSYNC,
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25 | STA_FREQHOLD,
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26 | STA_PPSSIGNAL,
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27 | STA_PPSJITTER,
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28 | STA_PPSWANDER,
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29 | STA_PPSERROR,
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30 | STA_CLOCKERR,
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31 | 0
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32 | };
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33 | static const char statlist_name[] =
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34 | "PLL" "\0"
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35 | "PPSFREQ" "\0"
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36 | "PPSTIME" "\0"
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37 | "FFL" "\0"
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38 | "INS" "\0"
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39 | "DEL" "\0"
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40 | "UNSYNC" "\0"
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41 | "FREQHOLD" "\0"
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42 | "PPSSIGNAL" "\0"
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43 | "PPSJITTER" "\0"
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44 | "PPSWANDER" "\0"
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45 | "PPSERROR" "\0"
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46 | "CLOCKERR"
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47 | ;
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48 |
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49 | static const char ret_code_descript[] =
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50 | "clock synchronized" "\0"
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51 | "insert leap second" "\0"
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52 | "delete leap second" "\0"
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53 | "leap second in progress" "\0"
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54 | "leap second has occurred" "\0"
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55 | "clock not synchronized"
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56 | ;
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57 |
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58 | int adjtimex_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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59 | int adjtimex_main(int argc UNUSED_PARAM, char **argv)
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60 | {
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61 | enum {
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62 | OPT_quiet = 0x1
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63 | };
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64 | unsigned opt;
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65 | char *opt_o, *opt_f, *opt_p, *opt_t;
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66 | struct timex txc;
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67 | int i, ret;
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68 | const char *descript;
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69 |
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70 | opt_complementary = "=0"; /* no valid non-option parameters */
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71 | opt = getopt32(argv, "qo:f:p:t:",
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72 | &opt_o, &opt_f, &opt_p, &opt_t);
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73 | txc.modes = 0;
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74 | //if (opt & 0x1) // -q
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75 | if (opt & 0x2) { // -o
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76 | txc.offset = xatol(opt_o);
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77 | txc.modes |= ADJ_OFFSET_SINGLESHOT;
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78 | }
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79 | if (opt & 0x4) { // -f
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80 | txc.freq = xatol(opt_f);
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81 | txc.modes |= ADJ_FREQUENCY;
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82 | }
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83 | if (opt & 0x8) { // -p
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84 | txc.constant = xatol(opt_p);
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85 | txc.modes |= ADJ_TIMECONST;
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86 | }
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87 | if (opt & 0x10) { // -t
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88 | txc.tick = xatol(opt_t);
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89 | txc.modes |= ADJ_TICK;
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90 | }
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91 |
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92 | ret = adjtimex(&txc);
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93 |
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94 | if (ret < 0) {
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95 | bb_perror_nomsg_and_die();
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96 | }
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97 |
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98 | if (!(opt & OPT_quiet)) {
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99 | int sep;
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100 | const char *name;
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101 |
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102 | printf(
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103 | " mode: %d\n"
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104 | "-o offset: %ld\n"
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105 | "-f frequency: %ld\n"
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106 | " maxerror: %ld\n"
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107 | " esterror: %ld\n"
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108 | " status: %d (",
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109 | txc.modes, txc.offset, txc.freq, txc.maxerror,
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110 | txc.esterror, txc.status);
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111 |
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112 | /* representative output of next code fragment:
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113 | "PLL | PPSTIME" */
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114 | name = statlist_name;
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115 | sep = 0;
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116 | for (i = 0; statlist_bit[i]; i++) {
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117 | if (txc.status & statlist_bit[i]) {
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118 | if (sep)
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119 | fputs(" | ", stdout);
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120 | fputs(name, stdout);
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121 | sep = 1;
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122 | }
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123 | name += strlen(name) + 1;
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124 | }
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125 |
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126 | descript = "error";
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127 | if (ret <= 5)
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128 | descript = nth_string(ret_code_descript, ret);
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129 | printf(")\n"
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130 | "-p timeconstant: %ld\n"
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131 | " precision: %ld\n"
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132 | " tolerance: %ld\n"
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133 | "-t tick: %ld\n"
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134 | " time.tv_sec: %ld\n"
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135 | " time.tv_usec: %ld\n"
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136 | " return value: %d (%s)\n",
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137 | txc.constant,
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138 | txc.precision, txc.tolerance, txc.tick,
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139 | (long)txc.time.tv_sec, (long)txc.time.tv_usec, ret, descript);
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140 | }
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141 |
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142 | return 0;
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143 | }
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