كلما كانت المهمة أبسط ، غالبًا ما أكون مخطئًا

# timedatectl Local time: Sun 2019-08-25 20:44:39 +03 Universal time: Sun 2019-08-25 17:44:39 UTC RTC time: Sun 2019-08-25 17:39:52 Time zone: Europe/Minsk (+03, +0300) NTP enabled: no NTP synchronized: no RTC in local TZ: no DST active: n/a 

الخطأ الأول. الثقة بالنفس

 # systemctl enable systemd-timesyncd.service && systemctl start systemd-timesyncd.service && ntpdate 0.ru.pool.ntp.org && timedatectl set-ntp on && timedatectl 25 Aug 21:00:10 ntpdate[28114]: adjust time server 195.210.189.106 offset -249.015251 sec Local time: Sun 2019-08-25 21:00:10 +03 Universal time: Sun 2019-08-25 18:00:10 UTC RTC time: Sun 2019-08-25 18:00:10 Time zone: Europe/Minsk (+03, +0300) NTP enabled: yes NTP synchronized: yes RTC in local TZ: no DST active: n/a 

 # timedatectl Local time: Sun 2019-08-25 21:09:15 +03 Universal time: Sun 2019-08-25 18:09:15 UTC RTC time: Sun 2019-08-25 18:05:04 Time zone: Europe/Minsk (+03, +0300) NTP enabled: yes NTP synchronized: no RTC in local TZ: no DST active: n/a 

 # ntpdate 0.ru.pool.ntp.org && timedatectl && sleep 1 && timedatectl 25 Aug 21:07:37 ntpdate[30350]: step time server 89.175.20.7 offset -249.220828 sec Local time: Sun 2019-08-25 21:07:37 +03 Universal time: Sun 2019-08-25 18:07:37 UTC RTC time: Sun 2019-08-25 18:07:37 Time zone: Europe/Minsk (+03, +0300) NTP enabled: yes NTP synchronized: yes RTC in local TZ: no DST active: n/a Local time: Sun 2019-08-25 21:11:46 +03 Universal time: Sun 2019-08-25 18:11:46 UTC RTC time: Sun 2019-08-25 18:07:37 Time zone: Europe/Minsk (+03, +0300) NTP enabled: yes NTP synchronized: no RTC in local TZ: no DST active: n/a 

 # date -s "2019-08-25 21:10:30" && date && sleep 1 && timedatectl Sun Aug 25 21:10:30 +03 2019 Sun Aug 25 21:10:30 +03 2019 Local time: Sun 2019-08-25 21:14:36 +03 Universal time: Sun 2019-08-25 18:14:36 UTC RTC time: Sun 2019-08-25 18:10:30 Time zone: Europe/Minsk (+03, +0300) NTP enabled: yes NTP synchronized: no RTC in local TZ: no DST active: n/a 

 # hwclock --hctosys && timedatectl && sleep 1 && timedatectl Local time: Sun 2019-08-25 21:11:31 +03 Universal time: Sun 2019-08-25 18:11:31 UTC RTC time: Sun 2019-08-25 18:11:31 Time zone: Europe/Minsk (+03, +0300) NTP enabled: yes NTP synchronized: yes RTC in local TZ: no DST active: n/a Local time: Sun 2019-08-25 21:15:36 +03 Universal time: Sun 2019-08-25 18:15:36 UTC RTC time: Sun 2019-08-25 18:11:32 Time zone: Europe/Minsk (+03, +0300) NTP enabled: yes NTP synchronized: no RTC in local TZ: no DST active: n/a 

 Aug 25 21:18:51 wisi systemd[1]: Time has been changed Aug 25 21:18:51 wisi systemd-timesyncd[29258]: System time changed. Resyncing. Aug 25 21:18:51 wisi systemd[1187]: Time has been changed Aug 25 21:18:51 wisi systemd[1]: Time has been changed Aug 25 21:18:51 wisi systemd[1187]: Time has been changed 

 # ps afx | grep "[1]187" 1187 ? Ss 0:02 /lib/systemd/systemd --user 

 # timedatectl set-ntp off && systemctl stop systemd-timesyncd.service # hwclock --hctosys && timedatectl && sleep 1 && timedatectl Local time: Sun 2019-08-25 21:25:40 +03 Universal time: Sun 2019-08-25 18:25:40 UTC RTC time: Sun 2019-08-25 18:25:40 Time zone: Europe/Minsk (+03, +0300) NTP enabled: no NTP synchronized: no RTC in local TZ: no DST active: n/a Local time: Sun 2019-08-25 21:29:31 +03 Universal time: Sun 2019-08-25 18:29:31 UTC RTC time: Sun 2019-08-25 18:25:41 Time zone: Europe/Minsk (+03, +0300) NTP enabled: no NTP synchronized: no RTC in local TZ: no DST active: n/a 

 Aug 25 21:25:40 wisi systemd[1]: Time has been changed Aug 25 21:25:40 wisi systemd[1187]: Time has been changed Aug 25 21:29:30 wisi systemd[1]: Time has been changed Aug 25 21:29:30 wisi systemd[1187]: Time has been changed 

الخطأ الثاني. تسرع

الخطأ الثالث. المستشارين

• لا أحد إلا يمكنك معرفة المشكلة كذلك ؛
• لا أحد يستطيع اختبار في نفس الظروف مثلك

• لا يجوز لك إعطاء جميع المدخلات لحل المشكلة ، لأنك توصلت بالفعل إلى الاتجاه "الصحيح" وحددت جوهر المشكلة من خلال التعويل عليها ؛
• فورمان (المشرف ، الموقت القديم ، المشرف) يكون دائمًا على صواب إذا كان فورمان مخطئًا ... حسنًا ، أنت تعرف ...

قرار

 # man syscalls | col | grep -F '(2)' | grep -vE '(:|;)' | grep -E '(time|date|clock)' | sed "s/(2).*//" | xargs -I SYSCALL echo "-S SYSCALL " | xargs echo -S adjtimex -S clock_adjtime -S clock_getres -S clock_gettime -S clock_nanosleep -S clock_settime -S futimesat -S getitimer -S gettimeofday -S mq_timedreceive -S mq_timedsend -S rt_sigtimedwait -S s390_runtime_instr -S setitimer -S settimeofday -S stime -S time -S timer_create -S timer_delete -S timer_getoverrun -S timer_gettime -S timer_settime -S timerfd_create -S timerfd_gettime -S timerfd_settime -S times -S utime -S utimensat -S utimes 

 auditctl -a exit,always -S adjtimex -S clock_adjtime -S clock_getres -S clock_nanosleep -S clock_settime -S futimesat -S getitimer -S gettimeofday -S mq_timedreceive -S mq_timedsend -S rt_sigtimedwait -S semtimedop -S setitimer -S settimeofday -S time -S timer_create -S timer_delete -S timer_getoverrun -S timer_gettime -S timer_settime -S timerfd_gettime -S timerfd_settime -S times -S utime -S utimensat -S utimes 

 # auditctl -a exit,always -S clock_settime -S settimeofday && date -s "2019-08-22 12:10:00" && sleep 5 && auditctl -D 

 # aureport -s -i Syscall Report ======================================= # date time syscall pid comm auid event ======================================= Warning - freq is non-zero and incremental flushing not selected. 1. 08/22/2019 12:10:00 settimeofday 3088 chkcache_proces root 479630 2. 08/26/2019 09:37:06 clock_settime 1538 date root 479629 

 # ausearch -sc settimeofday --comm "chkcache_proces" ---- time->Thu Aug 22 12:10:00 2019 type=PROCTITLE msg=audit(1566465000.000:479630): proctitle="/usr/local/bin/oscam" type=SYSCALL msg=audit(1566465000.000:479630): arch=c000003e syscall=164 success=yes exit=0 a0=7fde0dfc6e60 a1=0 a2=136cf a3=713ba56 items=0 ppid=3081 pid=3088 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts20 ses=68149 comm="chkcache_proces" exe="/usr/local/bin/oscam" key=(null) 

 #if defined(CLOCKFIX) if (tv.tv_sec > lasttime.tv_sec || (tv.tv_sec == lasttime.tv_sec && tv.tv_usec >= lasttime.tv_usec)) // check for time issues! { lasttime = tv; // register this valid time } else { tv = lasttime; settimeofday(&tv, NULL); // set time back to last known valid time //fprintf(stderr, "*** WARNING: BAD TIME AFFECTING WHOLE OSCAM ECM HANDLING, SYSTEMTIME SET TO LAST KNOWN VALID TIME **** \n"); }