From 062bef37b16f6b06f3147ec90fd018f361a17207 Mon Sep 17 00:00:00 2001
From: wukong <wukong@longaeva>
Date: Sat, 6 Dec 2025 00:22:16 -0800
Subject: merged changes from FreeBSD environment;

---
 ckcptime.awk |  7 +++----
 ckcptime.sh  |  2 +-
 ckt0.awk     | 25 +++++++++++++++++++++----
 ckt0.sh      |  6 ------
 4 files changed, 25 insertions(+), 15 deletions(-)

diff --git a/ckcptime.awk b/ckcptime.awk
index 9d8d5a7..e6c88d1 100644
--- a/ckcptime.awk
+++ b/ckcptime.awk
@@ -1,7 +1,9 @@
 #!/usr/bin/env awk -f
 
 
-function log10(n) { return log(n)/log(10.0) }
+function log10(n) {
+    return log(n)/log(10.0)
+}
 
 
 function merge_meas(est_val, est_unc, meas_val, meas_unc) {
@@ -135,9 +137,6 @@ function ck_uptime(t0_est, t0_unc) {
 BEGIN {
 
     OFMT="%.21g"
-    pi = 4.0*atan2(1.0, 1.0)
-    c0 = 299792458  # m/sec
-
     #print("_systime_", systime())
     #print("_boottime_", ck_boottime())
     printf("%s" ORS, ck_cptime())
diff --git a/ckcptime.sh b/ckcptime.sh
index 079faa6..697854b 100644
--- a/ckcptime.sh
+++ b/ckcptime.sh
@@ -11,7 +11,7 @@ set -e
 #sysctl kern.cp_time | awk -F= '{print($0)}'
 
 #printf "sec\n" | column -t
-for N in $(seq 0 45) ; do
+for N in $(seq 0 15) ; do
     #printf "${N} ${t0_est}\n" | column -t
     awk -f ckcptime.awk
     sleep $( awk 'BEGIN {print( rand()^2.0 + 1.0 )}' )
diff --git a/ckt0.awk b/ckt0.awk
index dac07ea..baeb599 100644
--- a/ckt0.awk
+++ b/ckt0.awk
@@ -1,7 +1,9 @@
 #!/usr/bin/env awk -f
 
 
-function log10(n) { return log(n)/log(10.0) }
+function log10(n) {
+    return log(n)/log(10.0)
+}
 
 
 function merge_meas(est_val, est_unc, meas_val, meas_unc) {
@@ -56,7 +58,22 @@ function ck_boottime() {
         t0_k = mktime(t0_k)
     }
 
-    return t0_k
+    if (uname ~/FreeBSD/) {
+        "sysctl kern.boottime" | getline t0_k
+        close("sysctl kern.boottime")
+        sub("^.*{", "", t0_k)
+        sub("}.*$", "", t0_k)
+        split(t0_k, t0_k_arr, ",")
+        for (n in t0_k_arr) {
+            sub("^.*= ", "", t0_k_arr[n])
+        }
+        t0_k = t0_k_arr[1] "." t0_k_arr[2]
+
+    }
+
+    t0_k_unc = systime()
+
+    return sprintf("%s %s", t0_k, t0_k_unc)
 
 }
 
@@ -140,8 +157,8 @@ BEGIN {
 
     # check ARGV for previous estimate
     if (ARGC > 0) {
-        ARGV[1] ? t0_est[1] = ARGV[1] : t0_est[1] = ck_boottime()
-        ARGV[2] ? t0_est[2] = ARGV[2] : t0_est[2] = systime()
+        ARGV[1] ? t0_est[1] = ARGV[1] : split(ck_boottime(), t0_est)
+        ARGV[2] ? t0_est[2] = ARGV[2] : split(ck_boottime(), t0_est)
     }
     #print("t0_est = ", t0_est[1])
     #print("t_boot_unc = ", t0_est[2])
diff --git a/ckt0.sh b/ckt0.sh
index e7953ba..eeb0479 100644
--- a/ckt0.sh
+++ b/ckt0.sh
@@ -11,12 +11,6 @@ set -e
 #sysctl_t0_str=$( sysctl kern.boottime | mawk -F= '{print($NF)}' )
 #sysctl_t0=$( date -jf "%a %b %d %H:%M:%S %G" "${sysctl_t0_str}" +%s )
 
-#epsilon1="$( mawk 'BEGIN{print(rand()^2.0)}' )"
-#t0_est="${sysctl_t0} $(date +%s)"
-#t0_est="${sysctl_t0} ${sysctl_t0}"
-#t0_est="${sysctl_t0} ${epsilon1}"
-#t0_est="${sysctl_t0} 1.0"
-
 if [ -f t0_est.log ] ; then {
     t0_est="$( cat t0_est.log )"
 } else {
-- 
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