/* 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 or set kernel time variables. See adjtimex(2)\n" //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 -t TICK Microseconds per tick, usually 10000" //usage: "\n (positive -t or -f values make clock run faster)" //usage: "\n -p TCONST" #include "libbb.h" #ifdef __BIONIC__ # include <linux/timex.h> #else # include <sys/timex.h> #endif static const uint16_t statlist_bit[] ALIGN2 = { 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[] ALIGN1 = "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[] ALIGN1 = "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)) { const char *sep; const char *name; printf( " mode: %d\n" "-o offset: %ld us\n" "-f freq.adjust: %ld (65536 = 1ppm)\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 = ""; for (i = 0; statlist_bit[i]; i++) { if (txc.status & statlist_bit[i]) { printf("%s%s", sep, name); sep = " | "; } name += strlen(name) + 1; } descript = "error"; if (ret <= 5) descript = nth_string(ret_code_descript, ret); printf(")\n" "-p timeconstant: %ld\n" " precision: %ld us\n" " tolerance: %ld\n" "-t tick: %ld us\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; }