adjkerntz.c (4090) | adjkerntz.c (4107) |
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1/* 2 * Copyright (C) 1993 by Andrew 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 --- 27 unchanged lines hidden (view full) --- 36 * Fix kernel time value if machine run wall CMOS clock 37 * (and /etc/wall_cmos_clock file present) 38 * using zoneinfo rules or direct TZ environment variable set. 39 * Use Joerg Wunsch idea for seconds accurate offset calculation 40 * with Garrett Wollman and Bruce Evans fixes. 41 * 42 */ 43#include <stdio.h> | 1/* 2 * Copyright (C) 1993 by Andrew 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 --- 27 unchanged lines hidden (view full) --- 36 * Fix kernel time value if machine run wall CMOS clock 37 * (and /etc/wall_cmos_clock file present) 38 * using zoneinfo rules or direct TZ environment variable set. 39 * Use Joerg Wunsch idea for seconds accurate offset calculation 40 * with Garrett Wollman and Bruce Evans fixes. 41 * 42 */ 43#include <stdio.h> |
44#include <signal.h> |
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44#include <stdlib.h> 45#include <unistd.h> 46#include <syslog.h> 47#include <sys/stat.h> 48#include <sys/time.h> 49#include <sys/param.h> 50#include <machine/cpu.h> 51#include <sys/sysctl.h> 52 53#include "pathnames.h" 54 55#define REPORT_PERIOD (30*60) 56 | 45#include <stdlib.h> 46#include <unistd.h> 47#include <syslog.h> 48#include <sys/stat.h> 49#include <sys/time.h> 50#include <sys/param.h> 51#include <machine/cpu.h> 52#include <sys/sysctl.h> 53 54#include "pathnames.h" 55 56#define REPORT_PERIOD (30*60) 57 |
58void fake() {} 59 |
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57int main(argc, argv) 58 int argc; 59 char **argv; 60{ 61 struct tm local, utc; 62 struct timeval tv, *stv; 63 struct timezone tz, *stz; 64 int kern_offset; 65 size_t len; 66 int mib[2]; 67 /* Avoid time_t here, can be unsigned long or worse */ 68 long offset, utcsec, localsec, diff; 69 time_t initial_sec, final_sec; 70 int ch, init = -1; 71 int disrtcset, need_restore = 0; | 60int main(argc, argv) 61 int argc; 62 char **argv; 63{ 64 struct tm local, utc; 65 struct timeval tv, *stv; 66 struct timezone tz, *stz; 67 int kern_offset; 68 size_t len; 69 int mib[2]; 70 /* Avoid time_t here, can be unsigned long or worse */ 71 long offset, utcsec, localsec, diff; 72 time_t initial_sec, final_sec; 73 int ch, init = -1; 74 int disrtcset, need_restore = 0; |
75 sigset_t mask, emask; |
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72 73 while ((ch = getopt(argc, argv, "ai")) != EOF) 74 switch((char)ch) { 75 case 'i': /* initial call, save offset */ 76 if (init != -1) 77 goto usage; 78 init = 1; 79 break; --- 10 unchanged lines hidden (view full) --- 90 return 2; 91 } 92 if (init == -1) 93 goto usage; 94 95 if (access(_PATH_CLOCK, F_OK)) 96 return 0; 97 | 76 77 while ((ch = getopt(argc, argv, "ai")) != EOF) 78 switch((char)ch) { 79 case 'i': /* initial call, save offset */ 80 if (init != -1) 81 goto usage; 82 init = 1; 83 break; --- 10 unchanged lines hidden (view full) --- 94 return 2; 95 } 96 if (init == -1) 97 goto usage; 98 99 if (access(_PATH_CLOCK, F_OK)) 100 return 0; 101 |
102 sigemptyset(&mask); 103 sigemptyset(&emask); 104 sigaddset(&mask, SIGTERM); 105 |
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98 openlog("adjkerntz", LOG_PID|LOG_PERROR, LOG_DAEMON); 99 | 106 openlog("adjkerntz", LOG_PID|LOG_PERROR, LOG_DAEMON); 107 |
108 (void) signal(SIGHUP, SIG_IGN); 109 110 if (init && daemon(0, 1)) { 111 syslog(LOG_ERR, "daemon: %m"); 112 return 1; 113 } 114 |
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100again: 101 | 115again: 116 |
117 (void) sigprocmask(SIG_BLOCK, &mask, NULL); 118 (void) signal(SIGTERM, fake); 119 |
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102/****** Critical section, do all things as fast as possible ******/ 103 104 /* get local CMOS clock and possible kernel offset */ 105 if (gettimeofday(&tv, &tz)) { 106 syslog(LOG_ERR, "gettimeofday: %m"); 107 return 1; 108 } 109 --- 11 unchanged lines hidden (view full) --- 121 if (utcsec == -1 || localsec == -1) { 122 /* 123 * XXX user can only control local time, and it is 124 * unacceptable to fail here for init. 2:30 am in the 125 * middle of the nonexistent hour means 3:30 am. 126 */ 127 syslog(LOG_WARNING, 128 "Nonexistent local time -- will retry after %d secs", REPORT_PERIOD); | 120/****** Critical section, do all things as fast as possible ******/ 121 122 /* get local CMOS clock and possible kernel offset */ 123 if (gettimeofday(&tv, &tz)) { 124 syslog(LOG_ERR, "gettimeofday: %m"); 125 return 1; 126 } 127 --- 11 unchanged lines hidden (view full) --- 139 if (utcsec == -1 || localsec == -1) { 140 /* 141 * XXX user can only control local time, and it is 142 * unacceptable to fail here for init. 2:30 am in the 143 * middle of the nonexistent hour means 3:30 am. 144 */ 145 syslog(LOG_WARNING, 146 "Nonexistent local time -- will retry after %d secs", REPORT_PERIOD); |
147 (void) signal(SIGTERM, SIG_DFL); 148 (void) sigprocmask(SIG_UNBLOCK, &mask, NULL); |
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129 (void) sleep(REPORT_PERIOD); 130 goto again; 131 } 132 offset = utcsec - localsec; 133 134 mib[0] = CTL_MACHDEP; 135 mib[1] = CPU_ADJKERNTZ; 136 len = sizeof(kern_offset); --- 23 unchanged lines hidden (view full) --- 160 localsec = mktime(&local); 161 if (utcsec == -1 || localsec == -1) { 162 /* 163 * XXX as above. The user has even less control, 164 * but perhaps we never get here. 165 */ 166 syslog(LOG_WARNING, 167 "Nonexistent (final) local time -- will retry after %d secs", REPORT_PERIOD); | 149 (void) sleep(REPORT_PERIOD); 150 goto again; 151 } 152 offset = utcsec - localsec; 153 154 mib[0] = CTL_MACHDEP; 155 mib[1] = CPU_ADJKERNTZ; 156 len = sizeof(kern_offset); --- 23 unchanged lines hidden (view full) --- 180 localsec = mktime(&local); 181 if (utcsec == -1 || localsec == -1) { 182 /* 183 * XXX as above. The user has even less control, 184 * but perhaps we never get here. 185 */ 186 syslog(LOG_WARNING, 187 "Nonexistent (final) local time -- will retry after %d secs", REPORT_PERIOD); |
188 (void) signal(SIGTERM, SIG_DFL); 189 (void) sigprocmask(SIG_UNBLOCK, &mask, NULL); |
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168 (void) sleep(REPORT_PERIOD); 169 goto again; 170 } 171 offset = utcsec - localsec; 172 173 /* correct the kerneltime for this diffs */ 174 /* subtract kernel offset, if present, old offset too */ 175 --- 60 unchanged lines hidden (view full) --- 236 if (sysctl(mib, 2, NULL, NULL, &disrtcset, len) == -1) { 237 syslog(LOG_ERR, "sysctl(restore_disrtcset): %m"); 238 return 1; 239 } 240 } 241 242/****** End of critical section ******/ 243 | 190 (void) sleep(REPORT_PERIOD); 191 goto again; 192 } 193 offset = utcsec - localsec; 194 195 /* correct the kerneltime for this diffs */ 196 /* subtract kernel offset, if present, old offset too */ 197 --- 60 unchanged lines hidden (view full) --- 258 if (sysctl(mib, 2, NULL, NULL, &disrtcset, len) == -1) { 259 syslog(LOG_ERR, "sysctl(restore_disrtcset): %m"); 260 return 1; 261 } 262 } 263 264/****** End of critical section ******/ 265 |
266 if (init) { 267 init = 0; 268 /* wait for signals and acts like -a */ 269 (void) sigsuspend(&emask); 270 goto again; 271 } 272 |
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244 return 0; 245} | 273 return 0; 274} |