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Diffstat (limited to 'busybox/miscutils/adjtimex.c')
-rw-r--r-- | busybox/miscutils/adjtimex.c | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/busybox/miscutils/adjtimex.c b/busybox/miscutils/adjtimex.c new file mode 100644 index 000000000..110c02654 --- /dev/null +++ b/busybox/miscutils/adjtimex.c | |||
@@ -0,0 +1,167 @@ | |||
1 | /* | ||
2 | * adjtimex.c - read, and possibly modify, the Linux kernel `timex' variables. | ||
3 | * | ||
4 | * Originally written: October 1997 | ||
5 | * Last hack: March 2001 | ||
6 | * Copyright 1997, 2000, 2001 Larry Doolittle <LRDoolittle@lbl.gov> | ||
7 | * | ||
8 | * This program is free software; you can redistribute it and/or modify | ||
9 | * it under the terms of the GNU General Public License (Version 2, | ||
10 | * June 1991) as published by the Free Software Foundation. At the | ||
11 | * time of writing, that license was published by the FSF with the URL | ||
12 | * http://www.gnu.org/copyleft/gpl.html, and is incorporated herein by | ||
13 | * reference. | ||
14 | * | ||
15 | * This program is distributed in the hope that it will be useful, | ||
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
18 | * GNU General Public License for more details. | ||
19 | * | ||
20 | * This adjtimex(1) is very similar in intent to adjtimex(8) by Steven | ||
21 | * Dick <ssd@nevets.oau.org> and Jim Van Zandt <jrv@vanzandt.mv.com> | ||
22 | * (see http://metalab.unc.edu/pub/Linux/system/admin/time/adjtimex*). | ||
23 | * That version predates this one, and is _much_ bigger and more | ||
24 | * featureful. My independently written version was very similar to | ||
25 | * Steven's from the start, because they both follow the kernel timex | ||
26 | * structure. I further tweaked this version to be equivalent to Steven's | ||
27 | * where possible, but I don't like getopt_long, so the actual usage | ||
28 | * syntax is incompatible. | ||
29 | * | ||
30 | * Amazingly enough, my Red Hat 5.2 sys/timex (and sub-includes) | ||
31 | * don't actually give a prototype for adjtimex(2), so building | ||
32 | * this code (with -Wall) gives a warning. Later versions of | ||
33 | * glibc fix this issue. | ||
34 | * | ||
35 | * This program is too simple for a Makefile, just build with: | ||
36 | * gcc -Wall -O adjtimex.c -o adjtimex | ||
37 | * | ||
38 | * busyboxed 20 March 2001, Larry Doolittle <ldoolitt@recycle.lbl.gov> | ||
39 | * It will autosense if it is built in a busybox environment, based | ||
40 | * on the BB_VER preprocessor macro. | ||
41 | */ | ||
42 | |||
43 | #include <stdio.h> | ||
44 | #include <sys/types.h> | ||
45 | #include <stdlib.h> | ||
46 | #include <unistd.h> | ||
47 | #include <sys/timex.h> | ||
48 | #include "busybox.h" | ||
49 | |||
50 | static struct {int bit; char *name;} statlist[] = { | ||
51 | { STA_PLL, "PLL" }, | ||
52 | { STA_PPSFREQ, "PPSFREQ" }, | ||
53 | { STA_PPSTIME, "PPSTIME" }, | ||
54 | { STA_FLL, "FFL" }, | ||
55 | { STA_INS, "INS" }, | ||
56 | { STA_DEL, "DEL" }, | ||
57 | { STA_UNSYNC, "UNSYNC" }, | ||
58 | { STA_FREQHOLD, "FREQHOLD" }, | ||
59 | { STA_PPSSIGNAL, "PPSSIGNAL" }, | ||
60 | { STA_PPSJITTER, "PPSJITTER" }, | ||
61 | { STA_PPSWANDER, "PPSWANDER" }, | ||
62 | { STA_PPSERROR, "PPSERROR" }, | ||
63 | { STA_CLOCKERR, "CLOCKERR" }, | ||
64 | { 0, NULL } }; | ||
65 | |||
66 | static char *ret_code_descript[] = { | ||
67 | "clock synchronized", | ||
68 | "insert leap second", | ||
69 | "delete leap second", | ||
70 | "leap second in progress", | ||
71 | "leap second has occurred", | ||
72 | "clock not synchronized" }; | ||
73 | |||
74 | #ifdef BB_VER | ||
75 | #define main adjtimex_main | ||
76 | #else | ||
77 | void usage(char *prog) | ||
78 | { | ||
79 | fprintf(stderr, | ||
80 | "Usage: %s [ -q ] [ -o offset ] [ -f frequency ] [ -p timeconstant ] [ -t tick ]\n", | ||
81 | prog); | ||
82 | } | ||
83 | #define bb_show_usage() usage(argv[0]) | ||
84 | #endif | ||
85 | |||
86 | int main(int argc, char ** argv) | ||
87 | { | ||
88 | struct timex txc; | ||
89 | int quiet=0; | ||
90 | int c, i, ret, sep; | ||
91 | char *descript; | ||
92 | txc.modes=0; | ||
93 | for (;;) { | ||
94 | c = getopt( argc, argv, "qo:f:p:t:"); | ||
95 | if (c == EOF) break; | ||
96 | switch (c) { | ||
97 | case 'q': | ||
98 | quiet=1; | ||
99 | break; | ||
100 | case 'o': | ||
101 | txc.offset = atoi(optarg); | ||
102 | txc.modes |= ADJ_OFFSET_SINGLESHOT; | ||
103 | break; | ||
104 | case 'f': | ||
105 | txc.freq = atoi(optarg); | ||
106 | txc.modes |= ADJ_FREQUENCY; | ||
107 | break; | ||
108 | case 'p': | ||
109 | txc.constant = atoi(optarg); | ||
110 | txc.modes |= ADJ_TIMECONST; | ||
111 | break; | ||
112 | case 't': | ||
113 | txc.tick = atoi(optarg); | ||
114 | txc.modes |= ADJ_TICK; | ||
115 | break; | ||
116 | default: | ||
117 | bb_show_usage(); | ||
118 | exit(1); | ||
119 | } | ||
120 | } | ||
121 | if (argc != optind) { /* no valid non-option parameters */ | ||
122 | bb_show_usage(); | ||
123 | exit(1); | ||
124 | } | ||
125 | |||
126 | ret = adjtimex(&txc); | ||
127 | |||
128 | if (ret < 0) perror("adjtimex"); | ||
129 | |||
130 | if (!quiet && ret>=0) { | ||
131 | printf( | ||
132 | " mode: %d\n" | ||
133 | "-o offset: %ld\n" | ||
134 | "-f frequency: %ld\n" | ||
135 | " maxerror: %ld\n" | ||
136 | " esterror: %ld\n" | ||
137 | " status: %d ( ", | ||
138 | txc.modes, txc.offset, txc.freq, txc.maxerror, | ||
139 | txc.esterror, txc.status); | ||
140 | |||
141 | /* representative output of next code fragment: | ||
142 | "PLL | PPSTIME" */ | ||
143 | sep=0; | ||
144 | for (i=0; statlist[i].name; i++) { | ||
145 | if (txc.status & statlist[i].bit) { | ||
146 | if (sep) fputs(" | ",stdout); | ||
147 | fputs(statlist[i].name,stdout); | ||
148 | sep=1; | ||
149 | } | ||
150 | } | ||
151 | |||
152 | descript = "error"; | ||
153 | if (ret >= 0 && ret <= 5) descript = ret_code_descript[ret]; | ||
154 | printf(" )\n" | ||
155 | "-p timeconstant: %ld\n" | ||
156 | " precision: %ld\n" | ||
157 | " tolerance: %ld\n" | ||
158 | "-t tick: %ld\n" | ||
159 | " time.tv_sec: %ld\n" | ||
160 | " time.tv_usec: %ld\n" | ||
161 | " return value: %d (%s)\n", | ||
162 | txc.constant, | ||
163 | txc.precision, txc.tolerance, txc.tick, | ||
164 | (long)txc.time.tv_sec, (long)txc.time.tv_usec, ret, descript); | ||
165 | } | ||
166 | return (ret<0); | ||
167 | } | ||