1/* vi: set sw=4 ts=4: */
2/*
3 * adjtimex.c - read, and possibly modify, the Linux kernel `timex' variables.
4 *
5 * Originally written: October 1997
6 * Last hack: March 2001
7 * Copyright 1997, 2000, 2001 Larry Doolittle <LRDoolittle@lbl.gov>
8 *
9 * busyboxed 20 March 2001, Larry Doolittle <ldoolitt@recycle.lbl.gov>
10 *
11 * Licensed under GPLv2 or later, see file License in this tarball for details.
12 */
13
14#include "libbb.h"
15#include <sys/timex.h>
16
17static const uint16_t statlist_bit[] = {
18	STA_PLL,
19	STA_PPSFREQ,
20	STA_PPSTIME,
21	STA_FLL,
22	STA_INS,
23	STA_DEL,
24	STA_UNSYNC,
25	STA_FREQHOLD,
26	STA_PPSSIGNAL,
27	STA_PPSJITTER,
28	STA_PPSWANDER,
29	STA_PPSERROR,
30	STA_CLOCKERR,
31	0
32};
33static const char statlist_name[] =
34	"PLL"       "\0"
35	"PPSFREQ"   "\0"
36	"PPSTIME"   "\0"
37	"FFL"       "\0"
38	"INS"       "\0"
39	"DEL"       "\0"
40	"UNSYNC"    "\0"
41	"FREQHOLD"  "\0"
42	"PPSSIGNAL" "\0"
43	"PPSJITTER" "\0"
44	"PPSWANDER" "\0"
45	"PPSERROR"  "\0"
46	"CLOCKERR"
47;
48
49static const char ret_code_descript[] =
50	"clock synchronized" "\0"
51	"insert leap second" "\0"
52	"delete leap second" "\0"
53	"leap second in progress" "\0"
54	"leap second has occurred" "\0"
55	"clock not synchronized"
56;
57
58int adjtimex_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
59int adjtimex_main(int argc UNUSED_PARAM, char **argv)
60{
61	enum {
62		OPT_quiet = 0x1
63	};
64	unsigned opt;
65	char *opt_o, *opt_f, *opt_p, *opt_t;
66	struct timex txc;
67	int i, ret;
68	const char *descript;
69
70	opt_complementary = "=0"; /* no valid non-option parameters */
71	opt = getopt32(argv, "qo:f:p:t:",
72			&opt_o, &opt_f, &opt_p, &opt_t);
73	txc.modes = 0;
74	//if (opt & 0x1) // -q
75	if (opt & 0x2) { // -o
76		txc.offset = xatol(opt_o);
77		txc.modes |= ADJ_OFFSET_SINGLESHOT;
78	}
79	if (opt & 0x4) { // -f
80		txc.freq = xatol(opt_f);
81		txc.modes |= ADJ_FREQUENCY;
82	}
83	if (opt & 0x8) { // -p
84		txc.constant = xatol(opt_p);
85		txc.modes |= ADJ_TIMECONST;
86	}
87	if (opt & 0x10) { // -t
88		txc.tick = xatol(opt_t);
89		txc.modes |= ADJ_TICK;
90	}
91
92	ret = adjtimex(&txc);
93
94	if (ret < 0) {
95		bb_perror_nomsg_and_die();
96	}
97
98	if (!(opt & OPT_quiet)) {
99		int sep;
100		const char *name;
101
102		printf(
103			"    mode:         %d\n"
104			"-o  offset:       %ld\n"
105			"-f  frequency:    %ld\n"
106			"    maxerror:     %ld\n"
107			"    esterror:     %ld\n"
108			"    status:       %d (",
109		txc.modes, txc.offset, txc.freq, txc.maxerror,
110		txc.esterror, txc.status);
111
112		/* representative output of next code fragment:
113		   "PLL | PPSTIME" */
114		name = statlist_name;
115		sep = 0;
116		for (i = 0; statlist_bit[i]; i++) {
117			if (txc.status & statlist_bit[i]) {
118				if (sep)
119					fputs(" | ", stdout);
120				fputs(name, stdout);
121				sep = 1;
122			}
123			name += strlen(name) + 1;
124		}
125
126		descript = "error";
127		if (ret <= 5)
128			descript = nth_string(ret_code_descript, ret);
129		printf(")\n"
130			"-p  timeconstant: %ld\n"
131			"    precision:    %ld\n"
132			"    tolerance:    %ld\n"
133			"-t  tick:         %ld\n"
134			"    time.tv_sec:  %ld\n"
135			"    time.tv_usec: %ld\n"
136			"    return value: %d (%s)\n",
137		txc.constant,
138		txc.precision, txc.tolerance, txc.tick,
139		(long)txc.time.tv_sec, (long)txc.time.tv_usec, ret, descript);
140	}
141
142	return 0;
143}
144