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A simple script for get birth time of Linux process

This is a simple script to get the Linux birth time of the system or a process using /proc/stat and /proc/pid/stat.
For example, you may get local datetime when process 12345 started:
import datetime
import btime
datetime.datetime.fromtimestamp(btime.process_time(12456)[1])
View the source code in github gists:
'''
Get the Linux birth time of the system or a process using /proc/stat
and /proc/pid/stat.
For example, you may get local datetime when process 12345 started:
import datetime
import btime
datetime.datetime.fromtimestamp(btime.process_time(12456)[1])
'''
import os
def system_btime():
'''
Get the timestamp when system is booted.
'''
stat = open('/proc/stat').readlines()
btime_line = [i.strip() for i in stat if i.startswith('btime')]
return int(btime_line[0].split(' ')[1])
def process_btime(pid):
'''
Return a tuple (secs, timestamp) of a process.
secs is the seconds when process started after system booted,
timestamp is the seconds.
'''
stat = open('/proc/%s/stat' % pid).read()
clock = int(stat.split(' ')[21])
secs = clock / os.sysconf('SC_CLK_TCK')
timestamp = system_btime() + secs
return secs, timestamp
view raw btime.py hosted with ❤ by GitHub

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