mirror of
https://github.com/topjohnwu/ndk-busybox.git
synced 2024-12-05 10:27:15 +00:00
e76c3b08e1
shadowed variables. Move (almost) all syscalls to libbb/syscalls.c, so I can handle them sanely and all at once. -Erik
177 lines
4.8 KiB
C
177 lines
4.8 KiB
C
/*
|
|
* 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>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License (Version 2,
|
|
* June 1991) as published by the Free Software Foundation. At the
|
|
* time of writing, that license was published by the FSF with the URL
|
|
* http://www.gnu.org/copyleft/gpl.html, and is incorporated herein by
|
|
* reference.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* This adjtimex(1) is very similar in intent to adjtimex(8) by Steven
|
|
* Dick <ssd@nevets.oau.org> and Jim Van Zandt <jrv@vanzandt.mv.com>
|
|
* (see http://metalab.unc.edu/pub/Linux/system/admin/time/adjtimex*).
|
|
* That version predates this one, and is _much_ bigger and more
|
|
* featureful. My independently written version was very similar to
|
|
* Steven's from the start, because they both follow the kernel timex
|
|
* structure. I further tweaked this version to be equivalent to Steven's
|
|
* where possible, but I don't like getopt_long, so the actual usage
|
|
* syntax is incompatible.
|
|
*
|
|
* Amazingly enough, my Red Hat 5.2 sys/timex (and sub-includes)
|
|
* don't actually give a prototype for adjtimex(2), so building
|
|
* this code (with -Wall) gives a warning. Later versions of
|
|
* glibc fix this issue.
|
|
*
|
|
* This program is too simple for a Makefile, just build with:
|
|
* gcc -Wall -O adjtimex.c -o adjtimex
|
|
*
|
|
* busyboxed 20 March 2001, Larry Doolittle <ldoolitt@recycle.lbl.gov>
|
|
* It will autosense if it is built in a busybox environment, based
|
|
* on the BB_VER preprocessor macro.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <sys/types.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#if __GNU_LIBRARY__ < 5
|
|
#include <sys/timex.h>
|
|
extern int adjtimex(struct timex *buf);
|
|
#else
|
|
#include <sys/timex.h>
|
|
#endif
|
|
|
|
#ifdef BB_VER
|
|
#include "busybox.h"
|
|
#endif
|
|
|
|
static struct {int bit; char *name;} statlist[] = {
|
|
{ STA_PLL, "PLL" },
|
|
{ STA_PPSFREQ, "PPSFREQ" },
|
|
{ STA_PPSTIME, "PPSTIME" },
|
|
{ STA_FLL, "FFL" },
|
|
{ STA_INS, "INS" },
|
|
{ STA_DEL, "DEL" },
|
|
{ STA_UNSYNC, "UNSYNC" },
|
|
{ STA_FREQHOLD, "FREQHOLD" },
|
|
{ STA_PPSSIGNAL, "PPSSIGNAL" },
|
|
{ STA_PPSJITTER, "PPSJITTER" },
|
|
{ STA_PPSWANDER, "PPSWANDER" },
|
|
{ STA_PPSERROR, "PPSERROR" },
|
|
{ STA_CLOCKERR, "CLOCKERR" },
|
|
{ 0, NULL } };
|
|
|
|
static char *ret_code_descript[] = {
|
|
"clock synchronized",
|
|
"insert leap second",
|
|
"delete leap second",
|
|
"leap second in progress",
|
|
"leap second has occurred",
|
|
"clock not synchronized" };
|
|
|
|
#ifdef BB_VER
|
|
#define main adjtimex_main
|
|
#else
|
|
void usage(char *prog)
|
|
{
|
|
fprintf(stderr,
|
|
"Usage: %s [ -q ] [ -o offset ] [ -f frequency ] [ -p timeconstant ] [ -t tick ]\n",
|
|
prog);
|
|
}
|
|
#define show_usage() usage(argv[0])
|
|
#endif
|
|
|
|
int main(int argc, char ** argv)
|
|
{
|
|
struct timex txc;
|
|
int quiet=0;
|
|
int c, i, ret, sep;
|
|
char *descript;
|
|
txc.modes=0;
|
|
for (;;) {
|
|
c = getopt( argc, argv, "qo:f:p:t:");
|
|
if (c == EOF) break;
|
|
switch (c) {
|
|
case 'q':
|
|
quiet=1;
|
|
break;
|
|
case 'o':
|
|
txc.offset = atoi(optarg);
|
|
txc.modes |= ADJ_OFFSET_SINGLESHOT;
|
|
break;
|
|
case 'f':
|
|
txc.freq = atoi(optarg);
|
|
txc.modes |= ADJ_FREQUENCY;
|
|
break;
|
|
case 'p':
|
|
txc.constant = atoi(optarg);
|
|
txc.modes |= ADJ_TIMECONST;
|
|
break;
|
|
case 't':
|
|
txc.tick = atoi(optarg);
|
|
txc.modes |= ADJ_TICK;
|
|
break;
|
|
default:
|
|
show_usage();
|
|
exit(1);
|
|
}
|
|
}
|
|
if (argc != optind) { /* no valid non-option parameters */
|
|
show_usage();
|
|
exit(1);
|
|
}
|
|
|
|
ret = adjtimex(&txc);
|
|
|
|
if (ret < 0) perror("adjtimex");
|
|
|
|
if (!quiet && ret>=0) {
|
|
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" */
|
|
sep=0;
|
|
for (i=0; statlist[i].name; i++) {
|
|
if (txc.status & statlist[i].bit) {
|
|
if (sep) fputs(" | ",stdout);
|
|
fputs(statlist[i].name,stdout);
|
|
sep=1;
|
|
}
|
|
}
|
|
|
|
descript = "error";
|
|
if (ret >= 0 && ret <= 5) descript = 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 (ret<0);
|
|
}
|