On 2020-03-19 20:33, Thomas Bohl wrote: > Hello, > > for a shell script I needed the uptime in seconds. I came up with the > following. I'm just wondering, is there an one-liner that does the > same thing?
$ echo $(( $(date +%s) - $(sysctl -n kern.boottime) )) 221493 > # Inspired by https://unix.stackexchange.com/a/270454 > uptime=`ps -o etime= -p 1` > uptd=`echo $uptime | grep '-' | awk -F "-" '{print $1}'` > > if [ "$uptd" == "" ] > then > upth=`echo $uptime | awk -F ":" '{print $1}'` > uptm=`echo $uptime | awk -F ":" '{print $2}'` > upts=`echo $uptime | awk -F ":" '{print $3}'` > > if [ "$upts" == "" ] > then > upts=$uptm > uptm=$upth > upth=0 > fi > > uptimeseconds=$((10#$upts + 10#$uptm * 60 + 10#$upth * 3600)) > else > upth=`echo $uptime | awk -F "-" '{print $2}' | awk -F ":" '{print > $1}'` > uptm=`echo $uptime | awk -F "-" '{print $2}' | awk -F ":" '{print > $2}'` > upts=`echo $uptime | awk -F "-" '{print $2}' | awk -F ":" '{print > $3}'` > uptimeseconds=$((10#$upts + 10#$uptm * 60 + 10#$upth * 3600 + > $uptd * 86400)) > fi > > echo $uptimeseconds
