#!/usr/bin/gawk -f

# echo -e "\d" | timedmesg ; dmesg | timedmesg | tail
# utime 0.47 time 2013-11-30 12:25:49.759020343+01:00
# Booted at 2013-11-30 12:25:49.759020343+01:00[1.38581e+09]
# 20131130-12:25:49 1385810749.470000 \d
# et aussi, avec des différences de temps..explicable
#tail /var/log/kern.log
#Nov 30 12:26:21 lethi kernel: [   32.720945] Bluetooth: RFCOMM TTY layer initialized
#Nov 30 12:26:21 lethi kernel: [   32.720950] Bluetooth: RFCOMM socket layer initialized
#Nov 30 12:26:21 lethi kernel: [   32.720952] Bluetooth: RFCOMM ver 1.11

# 2013-11-30 15:04:05.985020654+01:00
function lpass(cmd) {
  cmd | getline temp
  close(cmd)
  return(temp)
}

BEGIN {
	#for (i=1;i<ARGC;i++) {
	#	switch ( ARGV[i] ) {
	#		case "-h" :
	#			print "Usage: timedmesg [-v]"
	#			exit 0
	#	}
	#}

  # proctime
  ctime=utime=lpass("cat /proc/uptime | cut -d\\  -f1")
  # le point de départ de temps
  gsub(/\.[0-9]+$/, "", ctime)
  uptime=lpass("date --date=\""ctime" seconds ago\" +%s")

  gsub(/^[0-9]+\./, "0.", utime)
  print _"utime:",utime,"ctime:",ctime
  utime=time
  #gsub(/^[^\.]+/, "",utime)
  #gsub(/[^\+].*$/, "",utime)

  #uptime=uptime+utime
  #print "__--"uptime
  time=lpass(sprintf("date --rfc-3339=ns --date @%.5f", uptime))
  print("Booted at %s [%.6f]\n", time, uptime)
}

{
  if ( $1 ~ /^\[./ ) {
    cutime=$1
  } else {
    cutime=$2
  }
  #gsub(/^\[\ *[0-9]+\.[0-9]+\] /, "")
  gsub(/[\[\]]/, "", cutime)
  #print uptime,cutime
  printf("%s %.6f %s\n", strftime("%Y%m%d-%H:%M:%S", int(uptime+cutime)), uptime+cutime, $_)
}