| /* vi: set sw=4 ts=4: */ |
| /* |
| * adjtimex.c - read, and possibly modify, the Linux kernel `timex' variables. |
| * |
| * Originally written: October 1997 |
| * Last hack: March 2001 |
| * Copyright 1997, 2000, 2001 Larry Doolittle <LRDoolittle@lbl.gov> |
| * |
| * busyboxed 20 March 2001, Larry Doolittle <ldoolitt@recycle.lbl.gov> |
| * |
| * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
| */ |
| |
| //usage:#define adjtimex_trivial_usage |
| //usage: "[-q] [-o OFF] [-f FREQ] [-p TCONST] [-t TICK]" |
| //usage:#define adjtimex_full_usage "\n\n" |
| //usage: "Read and optionally set system timebase parameters. See adjtimex(2)\n" |
| //usage: "\nOptions:" |
| //usage: "\n -q Quiet" |
| //usage: "\n -o OFF Time offset, microseconds" |
| //usage: "\n -f FREQ Frequency adjust, integer kernel units (65536 is 1ppm)" |
| //usage: "\n (positive values make clock run faster)" |
| //usage: "\n -t TICK Microseconds per tick, usually 10000" |
| //usage: "\n -p TCONST" |
| |
| #include "libbb.h" |
| #include <sys/timex.h> |
| |
| static const uint16_t statlist_bit[] = { |
| STA_PLL, |
| STA_PPSFREQ, |
| STA_PPSTIME, |
| STA_FLL, |
| STA_INS, |
| STA_DEL, |
| STA_UNSYNC, |
| STA_FREQHOLD, |
| STA_PPSSIGNAL, |
| STA_PPSJITTER, |
| STA_PPSWANDER, |
| STA_PPSERROR, |
| STA_CLOCKERR, |
| 0 |
| }; |
| static const char statlist_name[] = |
| "PLL" "\0" |
| "PPSFREQ" "\0" |
| "PPSTIME" "\0" |
| "FFL" "\0" |
| "INS" "\0" |
| "DEL" "\0" |
| "UNSYNC" "\0" |
| "FREQHOLD" "\0" |
| "PPSSIGNAL" "\0" |
| "PPSJITTER" "\0" |
| "PPSWANDER" "\0" |
| "PPSERROR" "\0" |
| "CLOCKERR" |
| ; |
| |
| static const char ret_code_descript[] = |
| "clock synchronized" "\0" |
| "insert leap second" "\0" |
| "delete leap second" "\0" |
| "leap second in progress" "\0" |
| "leap second has occurred" "\0" |
| "clock not synchronized" |
| ; |
| |
| int adjtimex_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| int adjtimex_main(int argc UNUSED_PARAM, char **argv) |
| { |
| enum { |
| OPT_quiet = 0x1 |
| }; |
| unsigned opt; |
| char *opt_o, *opt_f, *opt_p, *opt_t; |
| struct timex txc; |
| int i, ret; |
| const char *descript; |
| |
| opt_complementary = "=0"; /* no valid non-option parameters */ |
| opt = getopt32(argv, "qo:f:p:t:", |
| &opt_o, &opt_f, &opt_p, &opt_t); |
| txc.modes = 0; |
| //if (opt & 0x1) // -q |
| if (opt & 0x2) { // -o |
| txc.offset = xatol(opt_o); |
| txc.modes |= ADJ_OFFSET_SINGLESHOT; |
| } |
| if (opt & 0x4) { // -f |
| txc.freq = xatol(opt_f); |
| txc.modes |= ADJ_FREQUENCY; |
| } |
| if (opt & 0x8) { // -p |
| txc.constant = xatol(opt_p); |
| txc.modes |= ADJ_TIMECONST; |
| } |
| if (opt & 0x10) { // -t |
| txc.tick = xatol(opt_t); |
| txc.modes |= ADJ_TICK; |
| } |
| |
| ret = adjtimex(&txc); |
| |
| if (ret < 0) { |
| bb_perror_nomsg_and_die(); |
| } |
| |
| if (!(opt & OPT_quiet)) { |
| int sep; |
| const char *name; |
| |
| printf( |
| " mode: %d\n" |
| "-o offset: %ld\n" |
| "-f frequency: %ld\n" |
| " maxerror: %ld\n" |
| " esterror: %ld\n" |
| " status: %d (", |
| txc.modes, txc.offset, txc.freq, txc.maxerror, |
| txc.esterror, txc.status); |
| |
| /* representative output of next code fragment: |
| "PLL | PPSTIME" */ |
| name = statlist_name; |
| sep = 0; |
| for (i = 0; statlist_bit[i]; i++) { |
| if (txc.status & statlist_bit[i]) { |
| if (sep) |
| fputs(" | ", stdout); |
| fputs(name, stdout); |
| sep = 1; |
| } |
| name += strlen(name) + 1; |
| } |
| |
| descript = "error"; |
| if (ret <= 5) |
| descript = nth_string(ret_code_descript, ret); |
| printf(")\n" |
| "-p timeconstant: %ld\n" |
| " precision: %ld\n" |
| " tolerance: %ld\n" |
| "-t tick: %ld\n" |
| " time.tv_sec: %ld\n" |
| " time.tv_usec: %ld\n" |
| " return value: %d (%s)\n", |
| txc.constant, |
| txc.precision, txc.tolerance, txc.tick, |
| (long)txc.time.tv_sec, (long)txc.time.tv_usec, ret, descript); |
| } |
| |
| return 0; |
| } |