1/*
2 * Copyright (C) 1993-1998 by Andrey A. Chernov, Moscow, Russia.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#if 0
28#ifndef lint
29static const char copyright[] =
30"@(#)Copyright (C) 1993-1996 by Andrey A. Chernov, Moscow, Russia.\n\
31 All rights reserved.\n";
32#endif /* not lint */
33#endif
34#include <sys/cdefs.h>
| 1/*
2 * Copyright (C) 1993-1998 by Andrey A. Chernov, Moscow, Russia.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#if 0
28#ifndef lint
29static const char copyright[] =
30"@(#)Copyright (C) 1993-1996 by Andrey A. Chernov, Moscow, Russia.\n\
31 All rights reserved.\n";
32#endif /* not lint */
33#endif
34#include <sys/cdefs.h>
|
36
37/*
38 * Andrey A. Chernov <ache@astral.msk.su> Dec 20 1993
39 *
40 * Fix kernel time value if machine run wall CMOS clock
41 * (and /etc/wall_cmos_clock file present)
42 * using zoneinfo rules or direct TZ environment variable set.
43 * Use Joerg Wunsch idea for seconds accurate offset calculation
44 * with Garrett Wollman and Bruce Evans fixes.
45 *
46 */
47#include <stdio.h>
48#include <signal.h>
49#include <stdlib.h>
50#include <unistd.h>
51#include <syslog.h>
52#include <sys/time.h>
53#include <sys/param.h>
54#include <machine/cpu.h>
55#include <sys/sysctl.h>
56
57#include "pathnames.h"
58
59/*#define DEBUG*/
60
61#define True (1)
62#define False (0)
63#define Unknown (-1)
64
65#define REPORT_PERIOD (30*60)
66
67static void fake(int);
68static void usage(void);
69
70static void
71fake(int unused __unused)
72{
73
74 /* Do nothing. */
75}
76
77int
78main(int argc, char *argv[])
79{
80 struct tm local;
81 struct timeval tv, *stv;
82 struct timezone tz, *stz;
83 int kern_offset, wall_clock, disrtcset;
84 size_t len;
85 /* Avoid time_t here, can be unsigned long or worse */
86 long offset, localsec, diff;
87 time_t initial_sec, final_sec;
88 int ch;
89 int initial_isdst = -1, final_isdst;
90 int need_restore = False, sleep_mode = False, looping,
91 init = Unknown;
92 sigset_t mask, emask;
93
94 while ((ch = getopt(argc, argv, "ais")) != -1)
95 switch((char)ch) {
96 case 'i': /* initial call, save offset */
97 if (init != Unknown)
98 usage();
99 init = True;
100 break;
101 case 'a': /* adjustment call, use saved offset */
102 if (init != Unknown)
103 usage();
104 init = False;
105 break;
106 case 's':
107 sleep_mode = True;
108 break;
109 default:
110 usage();
111 }
112 if (init == Unknown)
113 usage();
114
115 if (access(_PATH_CLOCK, F_OK) != 0)
116 return 0;
117
118 if (init)
119 sleep_mode = True;
120
121 sigemptyset(&mask);
122 sigemptyset(&emask);
123 sigaddset(&mask, SIGTERM);
124
125 openlog("adjkerntz", LOG_PID|LOG_PERROR, LOG_DAEMON);
126
127 (void) signal(SIGHUP, SIG_IGN);
128
| 36
37/*
38 * Andrey A. Chernov <ache@astral.msk.su> Dec 20 1993
39 *
40 * Fix kernel time value if machine run wall CMOS clock
41 * (and /etc/wall_cmos_clock file present)
42 * using zoneinfo rules or direct TZ environment variable set.
43 * Use Joerg Wunsch idea for seconds accurate offset calculation
44 * with Garrett Wollman and Bruce Evans fixes.
45 *
46 */
47#include <stdio.h>
48#include <signal.h>
49#include <stdlib.h>
50#include <unistd.h>
51#include <syslog.h>
52#include <sys/time.h>
53#include <sys/param.h>
54#include <machine/cpu.h>
55#include <sys/sysctl.h>
56
57#include "pathnames.h"
58
59/*#define DEBUG*/
60
61#define True (1)
62#define False (0)
63#define Unknown (-1)
64
65#define REPORT_PERIOD (30*60)
66
67static void fake(int);
68static void usage(void);
69
70static void
71fake(int unused __unused)
72{
73
74 /* Do nothing. */
75}
76
77int
78main(int argc, char *argv[])
79{
80 struct tm local;
81 struct timeval tv, *stv;
82 struct timezone tz, *stz;
83 int kern_offset, wall_clock, disrtcset;
84 size_t len;
85 /* Avoid time_t here, can be unsigned long or worse */
86 long offset, localsec, diff;
87 time_t initial_sec, final_sec;
88 int ch;
89 int initial_isdst = -1, final_isdst;
90 int need_restore = False, sleep_mode = False, looping,
91 init = Unknown;
92 sigset_t mask, emask;
93
94 while ((ch = getopt(argc, argv, "ais")) != -1)
95 switch((char)ch) {
96 case 'i': /* initial call, save offset */
97 if (init != Unknown)
98 usage();
99 init = True;
100 break;
101 case 'a': /* adjustment call, use saved offset */
102 if (init != Unknown)
103 usage();
104 init = False;
105 break;
106 case 's':
107 sleep_mode = True;
108 break;
109 default:
110 usage();
111 }
112 if (init == Unknown)
113 usage();
114
115 if (access(_PATH_CLOCK, F_OK) != 0)
116 return 0;
117
118 if (init)
119 sleep_mode = True;
120
121 sigemptyset(&mask);
122 sigemptyset(&emask);
123 sigaddset(&mask, SIGTERM);
124
125 openlog("adjkerntz", LOG_PID|LOG_PERROR, LOG_DAEMON);
126
127 (void) signal(SIGHUP, SIG_IGN);
128
|
130 syslog(LOG_ERR, "daemon: %m");
131 return 1;
132 }
133
134again:
135 (void) sigprocmask(SIG_BLOCK, &mask, NULL);
136 (void) signal(SIGTERM, fake);
137
138 diff = 0;
139 stv = NULL;
140 stz = NULL;
141 looping = False;
142
143 wall_clock = (access(_PATH_CLOCK, F_OK) == 0);
144 if (init && !sleep_mode) {
145 init = False;
146 if (!wall_clock)
147 return 0;
148 }
149
150 tzset();
151
152 len = sizeof(kern_offset);
153 if (sysctlbyname("machdep.adjkerntz", &kern_offset, &len, NULL, 0) == -1) {
154 syslog(LOG_ERR, "sysctl(\"machdep.adjkerntz\"): %m");
155 return 1;
156 }
157
158/****** Critical section, do all things as fast as possible ******/
159
160 /* get local CMOS clock and possible kernel offset */
161 if (gettimeofday(&tv, &tz)) {
162 syslog(LOG_ERR, "gettimeofday: %m");
163 return 1;
164 }
165
166 /* get the actual local timezone difference */
167 initial_sec = tv.tv_sec;
168
169recalculate:
170 local = *localtime(&initial_sec);
171 if (diff == 0)
172 initial_isdst = local.tm_isdst;
173 local.tm_isdst = initial_isdst;
174
175 /* calculate local CMOS diff from GMT */
176
177 localsec = mktime(&local);
178 if (localsec == -1) {
179 /*
180 * XXX user can only control local time, and it is
181 * unacceptable to fail here for init. 2:30 am in the
182 * middle of the nonexistent hour means 3:30 am.
183 */
184 if (!sleep_mode) {
185 syslog(LOG_WARNING,
186 "Warning: nonexistent local time, try to run later.");
187 syslog(LOG_WARNING, "Giving up.");
188 return 1;
189 }
190 syslog(LOG_WARNING,
191 "Warning: nonexistent local time.");
192 syslog(LOG_WARNING, "Will retry after %d minutes.",
193 REPORT_PERIOD / 60);
194 (void) signal(SIGTERM, SIG_DFL);
195 (void) sigprocmask(SIG_UNBLOCK, &mask, NULL);
196 (void) sleep(REPORT_PERIOD);
197 goto again;
198 }
199 offset = -local.tm_gmtoff;
200#ifdef DEBUG
201 fprintf(stderr, "Initial offset: %ld secs\n", offset);
202#endif
203
204 /* correct the kerneltime for this diffs */
205 /* subtract kernel offset, if present, old offset too */
206
207 diff = offset - tz.tz_minuteswest * 60 - kern_offset;
208
209 if (diff != 0) {
210#ifdef DEBUG
211 fprintf(stderr, "Initial diff: %ld secs\n", diff);
212#endif
213 /* Yet one step for final time */
214
215 final_sec = initial_sec + diff;
216
217 /* get the actual local timezone difference */
218 local = *localtime(&final_sec);
219 final_isdst = diff < 0 ? initial_isdst : local.tm_isdst;
220 if (diff > 0 && initial_isdst != final_isdst) {
221 if (looping)
222 goto bad_final;
223 looping = True;
224 initial_isdst = final_isdst;
225 goto recalculate;
226 }
227 local.tm_isdst = final_isdst;
228
229 localsec = mktime(&local);
230 if (localsec == -1) {
231 bad_final:
232 /*
233 * XXX as above. The user has even less control,
234 * but perhaps we never get here.
235 */
236 if (!sleep_mode) {
237 syslog(LOG_WARNING,
238 "Warning: nonexistent final local time, try to run later.");
239 syslog(LOG_WARNING, "Giving up.");
240 return 1;
241 }
242 syslog(LOG_WARNING,
243 "Warning: nonexistent final local time.");
244 syslog(LOG_WARNING, "Will retry after %d minutes.",
245 REPORT_PERIOD / 60);
246 (void) signal(SIGTERM, SIG_DFL);
247 (void) sigprocmask(SIG_UNBLOCK, &mask, NULL);
248 (void) sleep(REPORT_PERIOD);
249 goto again;
250 }
251 offset = -local.tm_gmtoff;
252#ifdef DEBUG
253 fprintf(stderr, "Final offset: %ld secs\n", offset);
254#endif
255
256 /* correct the kerneltime for this diffs */
257 /* subtract kernel offset, if present, old offset too */
258
259 diff = offset - tz.tz_minuteswest * 60 - kern_offset;
260
261 if (diff != 0) {
262#ifdef DEBUG
263 fprintf(stderr, "Final diff: %ld secs\n", diff);
264#endif
265 /*
266 * stv is abused as a flag. The important value
267 * is in `diff'.
268 */
269 stv = &tv;
270 }
271 }
272
273 if (tz.tz_dsttime != 0 || tz.tz_minuteswest != 0) {
274 tz.tz_dsttime = tz.tz_minuteswest = 0; /* zone info is garbage */
275 stz = &tz;
276 }
277 if (!wall_clock && stz == NULL)
278 stv = NULL;
279
280 /* if init or UTC clock and offset/date will be changed, */
281 /* disable RTC modification for a while. */
282
283 if ( (init && stv != NULL)
284 || ((init || !wall_clock) && kern_offset != offset)
285 ) {
286 len = sizeof(disrtcset);
287 if (sysctlbyname("machdep.disable_rtc_set", &disrtcset, &len, NULL, 0) == -1) {
288 syslog(LOG_ERR, "sysctl(get: \"machdep.disable_rtc_set\"): %m");
289 return 1;
290 }
291 if (disrtcset == 0) {
292 disrtcset = 1;
293 need_restore = True;
294 if (sysctlbyname("machdep.disable_rtc_set", NULL, NULL, &disrtcset, len) == -1) {
295 syslog(LOG_ERR, "sysctl(set: \"machdep.disable_rtc_set\"): %m");
296 return 1;
297 }
298 }
299 }
300
301 if ( (init && (stv != NULL || stz != NULL))
302 || (stz != NULL && stv == NULL)
303 ) {
304 if (stv != NULL) {
305 /*
306 * Get the time again, as close as possible to
307 * adjusting it, to minimise drift.
308 * XXX we'd better not fail between here and
309 * restoring disrtcset, since we don't clean up
310 * anything.
311 */
312 if (gettimeofday(&tv, (struct timezone *)NULL)) {
313 syslog(LOG_ERR, "gettimeofday: %m");
314 return 1;
315 }
316 tv.tv_sec += diff;
317 stv = &tv;
318 }
319 if (settimeofday(stv, stz)) {
320 syslog(LOG_ERR, "settimeofday: %m");
321 return 1;
322 }
323 }
324
325 /* setting machdep.adjkerntz have a side effect: resettodr(), which */
326 /* can be disabled by machdep.disable_rtc_set, so if init or UTC clock */
327 /* -- don't write RTC, else write RTC. */
328
329 if (kern_offset != offset) {
330 kern_offset = offset;
331 len = sizeof(kern_offset);
332 if (sysctlbyname("machdep.adjkerntz", NULL, NULL, &kern_offset, len) == -1) {
333 syslog(LOG_ERR, "sysctl(set: \"machdep.adjkerntz\"): %m");
334 return 1;
335 }
336 }
337
338 len = sizeof(wall_clock);
339 if (sysctlbyname("machdep.wall_cmos_clock", NULL, NULL, &wall_clock, len) == -1) {
340 syslog(LOG_ERR, "sysctl(set: \"machdep.wall_cmos_clock\"): %m");
341 return 1;
342 }
343
344 if (need_restore) {
345 need_restore = False;
346 disrtcset = 0;
347 len = sizeof(disrtcset);
348 if (sysctlbyname("machdep.disable_rtc_set", NULL, NULL, &disrtcset, len) == -1) {
349 syslog(LOG_ERR, "sysctl(set: \"machdep.disable_rtc_set\"): %m");
350 return 1;
351 }
352 }
353
354/****** End of critical section ******/
355
356 if (init && wall_clock) {
357 sleep_mode = False;
358 /* wait for signals and acts like -a */
359 (void) sigsuspend(&emask);
360 goto again;
361 }
362
363 return 0;
364}
365
366static void
367usage(void)
368{
369 fprintf(stderr, "%s\n%s\n%s\n%s\n",
370 "usage: adjkerntz -i",
371 "\t\t(initial call from /etc/rc)",
372 " adjkerntz -a [-s]",
373 "\t\t(adjustment call, -s for sleep/retry mode)");
374 exit(2);
375}
| 136 syslog(LOG_ERR, "daemon: %m");
137 return 1;
138 }
139
140again:
141 (void) sigprocmask(SIG_BLOCK, &mask, NULL);
142 (void) signal(SIGTERM, fake);
143
144 diff = 0;
145 stv = NULL;
146 stz = NULL;
147 looping = False;
148
149 wall_clock = (access(_PATH_CLOCK, F_OK) == 0);
150 if (init && !sleep_mode) {
151 init = False;
152 if (!wall_clock)
153 return 0;
154 }
155
156 tzset();
157
158 len = sizeof(kern_offset);
159 if (sysctlbyname("machdep.adjkerntz", &kern_offset, &len, NULL, 0) == -1) {
160 syslog(LOG_ERR, "sysctl(\"machdep.adjkerntz\"): %m");
161 return 1;
162 }
163
164/****** Critical section, do all things as fast as possible ******/
165
166 /* get local CMOS clock and possible kernel offset */
167 if (gettimeofday(&tv, &tz)) {
168 syslog(LOG_ERR, "gettimeofday: %m");
169 return 1;
170 }
171
172 /* get the actual local timezone difference */
173 initial_sec = tv.tv_sec;
174
175recalculate:
176 local = *localtime(&initial_sec);
177 if (diff == 0)
178 initial_isdst = local.tm_isdst;
179 local.tm_isdst = initial_isdst;
180
181 /* calculate local CMOS diff from GMT */
182
183 localsec = mktime(&local);
184 if (localsec == -1) {
185 /*
186 * XXX user can only control local time, and it is
187 * unacceptable to fail here for init. 2:30 am in the
188 * middle of the nonexistent hour means 3:30 am.
189 */
190 if (!sleep_mode) {
191 syslog(LOG_WARNING,
192 "Warning: nonexistent local time, try to run later.");
193 syslog(LOG_WARNING, "Giving up.");
194 return 1;
195 }
196 syslog(LOG_WARNING,
197 "Warning: nonexistent local time.");
198 syslog(LOG_WARNING, "Will retry after %d minutes.",
199 REPORT_PERIOD / 60);
200 (void) signal(SIGTERM, SIG_DFL);
201 (void) sigprocmask(SIG_UNBLOCK, &mask, NULL);
202 (void) sleep(REPORT_PERIOD);
203 goto again;
204 }
205 offset = -local.tm_gmtoff;
206#ifdef DEBUG
207 fprintf(stderr, "Initial offset: %ld secs\n", offset);
208#endif
209
210 /* correct the kerneltime for this diffs */
211 /* subtract kernel offset, if present, old offset too */
212
213 diff = offset - tz.tz_minuteswest * 60 - kern_offset;
214
215 if (diff != 0) {
216#ifdef DEBUG
217 fprintf(stderr, "Initial diff: %ld secs\n", diff);
218#endif
219 /* Yet one step for final time */
220
221 final_sec = initial_sec + diff;
222
223 /* get the actual local timezone difference */
224 local = *localtime(&final_sec);
225 final_isdst = diff < 0 ? initial_isdst : local.tm_isdst;
226 if (diff > 0 && initial_isdst != final_isdst) {
227 if (looping)
228 goto bad_final;
229 looping = True;
230 initial_isdst = final_isdst;
231 goto recalculate;
232 }
233 local.tm_isdst = final_isdst;
234
235 localsec = mktime(&local);
236 if (localsec == -1) {
237 bad_final:
238 /*
239 * XXX as above. The user has even less control,
240 * but perhaps we never get here.
241 */
242 if (!sleep_mode) {
243 syslog(LOG_WARNING,
244 "Warning: nonexistent final local time, try to run later.");
245 syslog(LOG_WARNING, "Giving up.");
246 return 1;
247 }
248 syslog(LOG_WARNING,
249 "Warning: nonexistent final local time.");
250 syslog(LOG_WARNING, "Will retry after %d minutes.",
251 REPORT_PERIOD / 60);
252 (void) signal(SIGTERM, SIG_DFL);
253 (void) sigprocmask(SIG_UNBLOCK, &mask, NULL);
254 (void) sleep(REPORT_PERIOD);
255 goto again;
256 }
257 offset = -local.tm_gmtoff;
258#ifdef DEBUG
259 fprintf(stderr, "Final offset: %ld secs\n", offset);
260#endif
261
262 /* correct the kerneltime for this diffs */
263 /* subtract kernel offset, if present, old offset too */
264
265 diff = offset - tz.tz_minuteswest * 60 - kern_offset;
266
267 if (diff != 0) {
268#ifdef DEBUG
269 fprintf(stderr, "Final diff: %ld secs\n", diff);
270#endif
271 /*
272 * stv is abused as a flag. The important value
273 * is in `diff'.
274 */
275 stv = &tv;
276 }
277 }
278
279 if (tz.tz_dsttime != 0 || tz.tz_minuteswest != 0) {
280 tz.tz_dsttime = tz.tz_minuteswest = 0; /* zone info is garbage */
281 stz = &tz;
282 }
283 if (!wall_clock && stz == NULL)
284 stv = NULL;
285
286 /* if init or UTC clock and offset/date will be changed, */
287 /* disable RTC modification for a while. */
288
289 if ( (init && stv != NULL)
290 || ((init || !wall_clock) && kern_offset != offset)
291 ) {
292 len = sizeof(disrtcset);
293 if (sysctlbyname("machdep.disable_rtc_set", &disrtcset, &len, NULL, 0) == -1) {
294 syslog(LOG_ERR, "sysctl(get: \"machdep.disable_rtc_set\"): %m");
295 return 1;
296 }
297 if (disrtcset == 0) {
298 disrtcset = 1;
299 need_restore = True;
300 if (sysctlbyname("machdep.disable_rtc_set", NULL, NULL, &disrtcset, len) == -1) {
301 syslog(LOG_ERR, "sysctl(set: \"machdep.disable_rtc_set\"): %m");
302 return 1;
303 }
304 }
305 }
306
307 if ( (init && (stv != NULL || stz != NULL))
308 || (stz != NULL && stv == NULL)
309 ) {
310 if (stv != NULL) {
311 /*
312 * Get the time again, as close as possible to
313 * adjusting it, to minimise drift.
314 * XXX we'd better not fail between here and
315 * restoring disrtcset, since we don't clean up
316 * anything.
317 */
318 if (gettimeofday(&tv, (struct timezone *)NULL)) {
319 syslog(LOG_ERR, "gettimeofday: %m");
320 return 1;
321 }
322 tv.tv_sec += diff;
323 stv = &tv;
324 }
325 if (settimeofday(stv, stz)) {
326 syslog(LOG_ERR, "settimeofday: %m");
327 return 1;
328 }
329 }
330
331 /* setting machdep.adjkerntz have a side effect: resettodr(), which */
332 /* can be disabled by machdep.disable_rtc_set, so if init or UTC clock */
333 /* -- don't write RTC, else write RTC. */
334
335 if (kern_offset != offset) {
336 kern_offset = offset;
337 len = sizeof(kern_offset);
338 if (sysctlbyname("machdep.adjkerntz", NULL, NULL, &kern_offset, len) == -1) {
339 syslog(LOG_ERR, "sysctl(set: \"machdep.adjkerntz\"): %m");
340 return 1;
341 }
342 }
343
344 len = sizeof(wall_clock);
345 if (sysctlbyname("machdep.wall_cmos_clock", NULL, NULL, &wall_clock, len) == -1) {
346 syslog(LOG_ERR, "sysctl(set: \"machdep.wall_cmos_clock\"): %m");
347 return 1;
348 }
349
350 if (need_restore) {
351 need_restore = False;
352 disrtcset = 0;
353 len = sizeof(disrtcset);
354 if (sysctlbyname("machdep.disable_rtc_set", NULL, NULL, &disrtcset, len) == -1) {
355 syslog(LOG_ERR, "sysctl(set: \"machdep.disable_rtc_set\"): %m");
356 return 1;
357 }
358 }
359
360/****** End of critical section ******/
361
362 if (init && wall_clock) {
363 sleep_mode = False;
364 /* wait for signals and acts like -a */
365 (void) sigsuspend(&emask);
366 goto again;
367 }
368
369 return 0;
370}
371
372static void
373usage(void)
374{
375 fprintf(stderr, "%s\n%s\n%s\n%s\n",
376 "usage: adjkerntz -i",
377 "\t\t(initial call from /etc/rc)",
378 " adjkerntz -a [-s]",
379 "\t\t(adjustment call, -s for sleep/retry mode)");
380 exit(2);
381}
|