[821] | 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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[1770] | 14 | #include "libbb.h"
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[821] | 15 | #include <sys/timex.h>
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| 16 |
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[1770] | 17 | static const struct {
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| 18 | int bit;
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| 19 | const char *name;
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| 20 | } statlist[] = {
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[821] | 21 | { STA_PLL, "PLL" },
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| 22 | { STA_PPSFREQ, "PPSFREQ" },
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| 23 | { STA_PPSTIME, "PPSTIME" },
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| 24 | { STA_FLL, "FFL" },
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| 25 | { STA_INS, "INS" },
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| 26 | { STA_DEL, "DEL" },
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| 27 | { STA_UNSYNC, "UNSYNC" },
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| 28 | { STA_FREQHOLD, "FREQHOLD" },
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| 29 | { STA_PPSSIGNAL, "PPSSIGNAL" },
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| 30 | { STA_PPSJITTER, "PPSJITTER" },
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| 31 | { STA_PPSWANDER, "PPSWANDER" },
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| 32 | { STA_PPSERROR, "PPSERROR" },
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| 33 | { STA_CLOCKERR, "CLOCKERR" },
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[1770] | 34 | { 0, NULL }
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| 35 | };
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[821] | 36 |
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[1770] | 37 | static const char *const ret_code_descript[] = {
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[821] | 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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[1770] | 43 | "clock not synchronized"
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| 44 | };
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[821] | 45 |
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[1770] | 46 | int adjtimex_main(int argc, char **argv);
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[821] | 47 | int adjtimex_main(int argc, char **argv)
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| 48 | {
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[1770] | 49 | enum {
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| 50 | OPT_quiet = 0x1
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| 51 | };
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| 52 | unsigned opt;
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| 53 | char *opt_o, *opt_f, *opt_p, *opt_t;
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[821] | 54 | struct timex txc;
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[1770] | 55 | int i, ret, sep;
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[821] | 56 | const char *descript;
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| 57 | txc.modes=0;
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[1770] | 58 |
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| 59 | opt = getopt32(argv, "qo:f:p:t:",
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| 60 | &opt_o, &opt_f, &opt_p, &opt_t);
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| 61 | //if (opt & 0x1) // -q
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| 62 | if (opt & 0x2) { // -o
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| 63 | txc.offset = xatol(opt_o);
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| 64 | txc.modes |= ADJ_OFFSET_SINGLESHOT;
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[821] | 65 | }
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[1770] | 66 | if (opt & 0x4) { // -f
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| 67 | txc.freq = xatol(opt_f);
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| 68 | txc.modes |= ADJ_FREQUENCY;
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| 69 | }
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| 70 | if (opt & 0x8) { // -p
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| 71 | txc.constant = xatol(opt_p);
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| 72 | txc.modes |= ADJ_TIMECONST;
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| 73 | }
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| 74 | if (opt & 0x10) { // -t
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| 75 | txc.tick = xatol(opt_t);
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| 76 | txc.modes |= ADJ_TICK;
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| 77 | }
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[821] | 78 | if (argc != optind) { /* no valid non-option parameters */
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| 79 | bb_show_usage();
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| 80 | }
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| 81 |
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| 82 | ret = adjtimex(&txc);
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| 83 |
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| 84 | if (ret < 0) perror("adjtimex");
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| 85 |
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[1770] | 86 | if (!(opt & OPT_quiet) && ret>=0) {
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[821] | 87 | printf(
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| 88 | " mode: %d\n"
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| 89 | "-o offset: %ld\n"
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| 90 | "-f frequency: %ld\n"
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| 91 | " maxerror: %ld\n"
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| 92 | " esterror: %ld\n"
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| 93 | " status: %d ( ",
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| 94 | txc.modes, txc.offset, txc.freq, txc.maxerror,
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| 95 | txc.esterror, txc.status);
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| 96 |
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| 97 | /* representative output of next code fragment:
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| 98 | "PLL | PPSTIME" */
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| 99 | sep=0;
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| 100 | for (i=0; statlist[i].name; i++) {
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| 101 | if (txc.status & statlist[i].bit) {
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| 102 | if (sep) fputs(" | ",stdout);
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| 103 | fputs(statlist[i].name,stdout);
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| 104 | sep=1;
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| 105 | }
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| 106 | }
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| 107 |
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| 108 | descript = "error";
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| 109 | if (ret >= 0 && ret <= 5) descript = ret_code_descript[ret];
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| 110 | printf(" )\n"
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| 111 | "-p timeconstant: %ld\n"
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| 112 | " precision: %ld\n"
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| 113 | " tolerance: %ld\n"
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| 114 | "-t tick: %ld\n"
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| 115 | " time.tv_sec: %ld\n"
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| 116 | " time.tv_usec: %ld\n"
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| 117 | " return value: %d (%s)\n",
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| 118 | txc.constant,
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| 119 | txc.precision, txc.tolerance, txc.tick,
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| 120 | (long)txc.time.tv_sec, (long)txc.time.tv_usec, ret, descript);
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| 121 | }
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| 122 | return (ret<0);
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| 123 | }
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