ps output lstart in ISO format like YYYY-MM-DD HH:MM:SS

ps.sh

# from: https://unix.stackexchange.com/questions/401785/ps-output-with-iso-date-format

ps -eo lstart,pid,cmd --sort=start_time|sed '1d' | awk '{c="date -d\""$1 FS $2 FS $3 FS $4 FS $5"\" +\047%Y-%m-%dT%H:%M:%S\047"; c|getline d; close(c); $1=$2=$3=$4=$5=""; printf "%s\n",d$0 }'
#2018-04-23T15:38:18     1 /sbin/init
#2018-04-23T15:38:18     2 [kthreadd]
#2018-04-23T15:38:18     3 [migration/0]
#2018-04-23T15:38:18     4 [ksoftirqd/0]
#2018-04-23T15:38:18     5 [stopper/0]
#2018-04-23T15:38:18     6 [watchdog/0]


# from https://stackoverflow.com/questions/29203110/invoking-date-command-inside-awk-string-with-a-formatting
# As for why store the command in a variable - because you have to close it after you use it and it must be spelled exactly the same way in the close command as it was when you opened the pipe. 
# Compare:

cmd = "date +%a -d \"" $1 "\""
cmd | getline
close(cmd)

# vs:

"date +%a -d \"" $1 "\"" | getline
close("date +%a -d \"" $l "\"")

# and take an extremely close second look to spot the bug in the 2nd version