Need an uptime command -- no, not 'uptime'

Submitted by supermike on Fri, 2006-06-02 01:41.

Posts: 471
Joined: 2006-02-17

I need an uptime command that I can run, and not the 'uptime' command. I'm not interested in this case in how long the OS has been up, but how long a PID (Process ID) has been running in memory. Anyone got an idea?

When in doubt, follow the penguins.

Fri, 2006-06-02 02:27 I tried looking for such

libervisco

Posts: 3856
Joined: 2006-05-04

I tried looking for such info in top or htop (a nicer version of top) thinking that the "TIME" field may be the uptime, but it turns out it is only the CPU time.

Another idea is the procinfo command, but that displays only general uptimes of the system and some other processes info..

Now I'm not sure if PIDs even track uptime information for themselves. I suppose they should.

Well.. I hope that at least takes you closer to the right idea. I'll let you know if I find out more.

There has to be a way..

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Fri, 2006-06-02 10:30 just a lucky guess: I

tbuitenh

Posts: 1059
Joined: 2005-12-21

just a lucky guess: I think

ls -l /proc | grep <pid>

will show you what time <pid> was created

CAN I HAS FIXD CAPSLOK KEE PLZ?

Tue, 2006-06-06 22:30 tbuitenh wrote:just a

spyro_boy

Posts: 84
Joined: 2006-01-02

tbuitenh wrote:

just a lucky guess: I think

ls -l /proc | grep

will show you what time was created

Hah, that's pretty creative. I like that Smiling

All ye need to do now is run that through a script to parse that timestamp into hours.

Cluenet

Sun, 2006-06-18 10:29 just a few simple commands

free-zombie

Posts: 805
Joined: 2006-03-08

just a few simple commands Eye-wink

###
# function determines uptime of a specified process ($1).
# tested in zsh 4.3.2 and bash 3.1 (Debian GNU/Linux SID)
###
function pidup ()                                               
{
  (( secs = $( date +%s ) - $( date --date="$( ls -l /proc | awk "/$1/ { printf (\"%s %s\",\$6,\$7) ; }" )" +%s ) ))
  echo up for $(( $secs / 3600 ))h $(( ($secs % 3600) / 60 ))m $(( $secs % 60 ))s
}

Thomas Jollans
GnuPG key: 1024D/A6B5 9461 B60F 2C80 2399 6B1E 2698 A70E F421 434B

Tue, 2007-09-11 14:36 yay. I would've wanted to

spyro_boy

Posts: 84
Joined: 2006-01-02

yay. I would've wanted to try it but I guess you beat me to it. Smiling

Cluenet