1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
/*
* 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>
#include <sys/timex.h>
#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,
txc.time.tv_sec, txc.time.tv_usec, ret, descript);
}
return (ret<0);
}
|
