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authorEric Andersen2001-10-24 05:00:29 +0000
committerEric Andersen2001-10-24 05:00:29 +0000
commitbdfd0d78bc44e73d693510e70087857785b3b521 (patch)
tree153a573095afac8d8d0ea857759ecabd77fb28b7 /adjtimex.c
parent9260fc5552a3ee52eb95823aa6689d52a1ffd33c (diff)
downloadbusybox-bdfd0d78bc44e73d693510e70087857785b3b521.zip
busybox-bdfd0d78bc44e73d693510e70087857785b3b521.tar.gz
Major rework of the directory structure and the entire build system.
-Erik
Diffstat (limited to 'adjtimex.c')
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-/*
- * 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);
-}