Entry

List of pids running a program

Jul 5th, 2000 10:00
Nathan Wallace, Hans Nowak, Snippet 163, Tim Evans

"""
Packages: operating_systems.unix
"""
"""
> [Adrian Eyre]
> > os.system("ps aux|grep someProcess > pids.temp")
> 
> Try:
> f = os.popen("ps aux|grep " + someProcessStr)
> l = f.readlines()
> f.close()
The pipe to grep is slightly unnecessary, you could just use python to 
filter the lines.  Try this:
"""
#=============== ps.py ===============
#!/usr/bin/python
import os
import string
def pids(program):
    '''Return a list of process ids for all processes that are running
    "program".  Relies on a particular output format for ps a little
    too much.'''
    result = []
    f = os.popen('ps aux', 'r')
    for l in f.readlines():
        fields = string.split(l)
        if fields[10] == program:
            result.append(int(fields[1]))
    return result
if __name__ == '__main__':
    print pids('gnome-terminal')
#==============================
#$ ./ps.py
#[18910, 18925]