At times, you may want to determine the elapsed wall-clock time or uptime for a running process. While you can determine the process’ elapsed time using certain versions of the ps utility, it can also be determined using a simple shell script with a bit of perl. Both these methods are described below with the init process (PID = 1):
SOLUTION 1: The ps utility on some variants of UNIX (e.g. Linux, but not Solaris)
ps -oetime 1 ELAPSED 39:45 |
SOLUTION 2: A shell script with a bit of perl (should work on all variants of UNIX)
Download the shell script (puptime.ksh) or copy and paste from below:
#!/bin/ksh # puptime.ksh - Gavin Satur - https://cybergav.in/2009/11/09/puptime # Simple script to calculate the uptime (elapsed wall clock time) of a process ############################################################################## # # Accept PID and do some basic validation # proc_pid=$1 if [ -z "$proc_pid" ]; then print "\nERROR : Missing input argument. SYNTAX: ksh puptime.ksh <pid>\n" exit 999 fi if [ ! -d /proc/$proc_pid ]; then print "\nERROR : No directory for PID $proc_pid in /proc. Check if process is running!\n" exit 999 fi # # Calculate start time of process and current time in epoch time using a bit of perl # proc_stime=`perl -e 'use File::stat; my $filename = "$ARGV[0]"; $sb = stat($filename); printf "%s", $sb->mtime;' /proc/$proc_pid` currtime=`perl -e 'print time;'` # # Calculate process uptime in seconds and then slice'n'dice for human-friendly output # proc_time=$(( currtime - proc_stime )) proc_time_days=$(( proc_time / 86400 )) proc_time_secs=$(( proc_time % 86400 )) proc_time_hours=$(( proc_time_secs / 3600 )) proc_time_secs=$(( proc_time_secs % 3600 )) proc_time_minutes=$((proc_time_secs / 60 )) proc_time_secs=$(( proc_time_secs % 60 )) print "\nUPTIME FOR PROCESS WITH PID $proc_pid = $proc_time_days day(s) $proc_time_hours hour(s) $proc_time_minutes minute(s) $proc_time_secs second(s) \n" |
./puptime.ksh 1 UPTIME FOR PROCESS WITH PID 1 = 0 day(s) 0 hour(s) 39 minute(s) 37 second(s) |
(Visited 205 times, 1 visits today)
That’s great script. Thanks a lot. It worked great.