| 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 | //usage:#define adjtimex_trivial_usage
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| 15 | //usage: "[-q] [-o OFF] [-f FREQ] [-p TCONST] [-t TICK]"
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| 16 | //usage:#define adjtimex_full_usage "\n\n"
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| 17 | //usage: "Read or set kernel time variables. See adjtimex(2)\n"
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| 18 | //usage: "\n -q Quiet"
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| 19 | //usage: "\n -o OFF Time offset, microseconds"
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| 20 | //usage: "\n -f FREQ Frequency adjust, integer kernel units (65536 is 1ppm)"
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| 21 | //usage: "\n -t TICK Microseconds per tick, usually 10000"
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| 22 | //usage: "\n (positive -t or -f values make clock run faster)"
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| 23 | //usage: "\n -p TCONST"
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| 24 |
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| 25 | #include "libbb.h"
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| 26 | #ifdef __BIONIC__
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| 27 | # include <linux/timex.h>
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| 28 | #else
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| 29 | # include <sys/timex.h>
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| 30 | #endif
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| 31 |
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| 32 | static const uint16_t statlist_bit[] ALIGN2 = {
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| 33 | STA_PLL,
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| 34 | STA_PPSFREQ,
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| 35 | STA_PPSTIME,
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| 36 | STA_FLL,
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| 37 | STA_INS,
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| 38 | STA_DEL,
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| 39 | STA_UNSYNC,
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| 40 | STA_FREQHOLD,
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| 41 | STA_PPSSIGNAL,
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| 42 | STA_PPSJITTER,
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| 43 | STA_PPSWANDER,
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| 44 | STA_PPSERROR,
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| 45 | STA_CLOCKERR,
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| 46 | 0
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| 47 | };
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| 48 | static const char statlist_name[] ALIGN1 =
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| 49 | "PLL" "\0"
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| 50 | "PPSFREQ" "\0"
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| 51 | "PPSTIME" "\0"
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| 52 | "FFL" "\0"
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| 53 | "INS" "\0"
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| 54 | "DEL" "\0"
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| 55 | "UNSYNC" "\0"
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| 56 | "FREQHOLD" "\0"
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| 57 | "PPSSIGNAL" "\0"
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| 58 | "PPSJITTER" "\0"
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| 59 | "PPSWANDER" "\0"
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| 60 | "PPSERROR" "\0"
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| 61 | "CLOCKERR"
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| 62 | ;
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| 63 |
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| 64 | static const char ret_code_descript[] ALIGN1 =
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| 65 | "clock synchronized" "\0"
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| 66 | "insert leap second" "\0"
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| 67 | "delete leap second" "\0"
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| 68 | "leap second in progress" "\0"
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| 69 | "leap second has occurred" "\0"
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| 70 | "clock not synchronized"
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| 71 | ;
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| 72 |
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| 73 | int adjtimex_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 74 | int adjtimex_main(int argc UNUSED_PARAM, char **argv)
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| 75 | {
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| 76 | enum {
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| 77 | OPT_quiet = 0x1
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| 78 | };
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| 79 | unsigned opt;
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| 80 | char *opt_o, *opt_f, *opt_p, *opt_t;
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| 81 | struct timex txc;
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| 82 | int i, ret;
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| 83 | const char *descript;
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| 84 |
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| 85 | opt_complementary = "=0"; /* no valid non-option parameters */
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| 86 | opt = getopt32(argv, "qo:f:p:t:",
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| 87 | &opt_o, &opt_f, &opt_p, &opt_t);
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| 88 | txc.modes = 0;
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| 89 | //if (opt & 0x1) // -q
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| 90 | if (opt & 0x2) { // -o
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| 91 | txc.offset = xatol(opt_o);
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| 92 | txc.modes |= ADJ_OFFSET_SINGLESHOT;
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| 93 | }
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| 94 | if (opt & 0x4) { // -f
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| 95 | txc.freq = xatol(opt_f);
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| 96 | txc.modes |= ADJ_FREQUENCY;
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| 97 | }
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| 98 | if (opt & 0x8) { // -p
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| 99 | txc.constant = xatol(opt_p);
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| 100 | txc.modes |= ADJ_TIMECONST;
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| 101 | }
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| 102 | if (opt & 0x10) { // -t
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| 103 | txc.tick = xatol(opt_t);
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| 104 | txc.modes |= ADJ_TICK;
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| 105 | }
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| 106 |
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| 107 | ret = adjtimex(&txc);
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| 108 |
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| 109 | if (ret < 0) {
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| 110 | bb_perror_nomsg_and_die();
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| 111 | }
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| 112 |
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| 113 | if (!(opt & OPT_quiet)) {
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| 114 | const char *sep;
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| 115 | const char *name;
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| 116 |
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| 117 | printf(
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| 118 | " mode: %d\n"
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| 119 | "-o offset: %ld us\n"
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| 120 | "-f freq.adjust: %ld (65536 = 1ppm)\n"
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| 121 | " maxerror: %ld\n"
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| 122 | " esterror: %ld\n"
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| 123 | " status: %d (",
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| 124 | txc.modes, txc.offset, txc.freq, txc.maxerror,
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| 125 | txc.esterror, txc.status);
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| 126 |
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| 127 | /* representative output of next code fragment:
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| 128 | * "PLL | PPSTIME"
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| 129 | */
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| 130 | name = statlist_name;
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| 131 | sep = "";
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| 132 | for (i = 0; statlist_bit[i]; i++) {
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| 133 | if (txc.status & statlist_bit[i]) {
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| 134 | printf("%s%s", sep, name);
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| 135 | sep = " | ";
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| 136 | }
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| 137 | name += strlen(name) + 1;
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| 138 | }
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| 139 |
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| 140 | descript = "error";
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| 141 | if (ret <= 5)
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| 142 | descript = nth_string(ret_code_descript, ret);
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| 143 | printf(")\n"
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| 144 | "-p timeconstant: %ld\n"
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| 145 | " precision: %ld us\n"
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| 146 | " tolerance: %ld\n"
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| 147 | "-t tick: %ld us\n"
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| 148 | " time.tv_sec: %ld\n"
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| 149 | " time.tv_usec: %ld\n"
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| 150 | " return value: %d (%s)\n",
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| 151 | txc.constant,
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| 152 | txc.precision, txc.tolerance, txc.tick,
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| 153 | (long)txc.time.tv_sec, (long)txc.time.tv_usec, ret, descript);
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| 154 | }
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| 155 |
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| 156 | return 0;
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| 157 | }
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