1 /* vi: set sw=4 ts=4: */
3 * adjtimex.c - read, and possibly modify, the Linux kernel `timex' variables.
5 * Originally written: October 1997
6 * Last hack: March 2001
7 * Copyright 1997, 2000, 2001 Larry Doolittle <LRDoolittle@lbl.gov>
9 * busyboxed 20 March 2001, Larry Doolittle <ldoolitt@recycle.lbl.gov>
11 * Licensed under GPLv2 or later, see file License in this tarball for details.
15 #include <sys/timex.h>
17 static const uint16_t statlist_bit[] = {
33 static const char statlist_name[] =
49 static const char ret_code_descript[] =
50 "clock synchronized" "\0"
51 "insert leap second" "\0"
52 "delete leap second" "\0"
53 "leap second in progress" "\0"
54 "leap second has occurred" "\0"
55 "clock not synchronized"
58 int adjtimex_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
59 int adjtimex_main(int argc, char **argv)
65 char *opt_o, *opt_f, *opt_p, *opt_t;
71 opt = getopt32(argv, "qo:f:p:t:",
72 &opt_o, &opt_f, &opt_p, &opt_t);
73 //if (opt & 0x1) // -q
74 if (opt & 0x2) { // -o
75 txc.offset = xatol(opt_o);
76 txc.modes |= ADJ_OFFSET_SINGLESHOT;
78 if (opt & 0x4) { // -f
79 txc.freq = xatol(opt_f);
80 txc.modes |= ADJ_FREQUENCY;
82 if (opt & 0x8) { // -p
83 txc.constant = xatol(opt_p);
84 txc.modes |= ADJ_TIMECONST;
86 if (opt & 0x10) { // -t
87 txc.tick = xatol(opt_t);
88 txc.modes |= ADJ_TICK;
90 if (argc != optind) { /* no valid non-option parameters */
97 bb_perror_nomsg_and_die();
100 if (!(opt & OPT_quiet)) {
107 "-f frequency: %ld\n"
111 txc.modes, txc.offset, txc.freq, txc.maxerror,
112 txc.esterror, txc.status);
114 /* representative output of next code fragment:
116 name = statlist_name;
118 for (i = 0; statlist_bit[i]; i++) {
119 if (txc.status & statlist_bit[i]) {
121 fputs(" | ", stdout);
125 name += strlen(name) + 1;
130 descript = nth_string(ret_code_descript, ret);
132 "-p timeconstant: %ld\n"
136 " time.tv_sec: %ld\n"
137 " time.tv_usec: %ld\n"
138 " return value: %d (%s)\n",
140 txc.precision, txc.tolerance, txc.tick,
141 (long)txc.time.tv_sec, (long)txc.time.tv_usec, ret, descript);