Hi all,
please note that once I finished writing the script someone explained me
that there is a command pwait under Solaris... anyway it was fun to
write and it did not take long (while I am not a python guru..). And my
version is MUUUCH better :)
Is there no standard interfaces to the process table? I only found
examples of how to do it on the win32 platform. So I parse with re the
output of /usr/ucb/ps...
Because I am still at the begining of learning python, I wanted to have
some advice here how I could have done the following code better...
Thanks in advance, Ben.
------waitPID.py---------------------------------------------
#!/usr/local/bin/python
import os
import time
import re
import getopt
import sys
def usage():
print >>sys.stderr, sys.argv[0] + " Usage"
print >>sys.stderr, """waits until the specified processes have
finished
-r <regexp> | --regexp=<regexp> will watch the processes matching with
<regexp> at their beginning
-p <pid> | --pid=<pid> will watch the processes with the pid
<pid>
-h | --help will display this screen
"""
try:
opts, args = getopt.getopt(sys.argv[1:], "hr:p:", ["help", "regexp=",
"pid="])
except getopt.GetoptError:
usage()
sys.exit(2)
regexps = []
pids = []
for o, a in opts:
if o in ("-r", "--regexp"):
regexps.append(re.compile('^' + a))
if o in ("-p", "--pid"):
pids.append(a)
if o in ("-h", "--help"):
usage()
sys.exit()
def ps():
stdout = os.popen("/usr/ucb/ps -auxwwww")
allprocesses = stdout.readlines()
stdout.close()
return allprocesses
_psline =
re.compile(r"^(\S{1,10})\s*(\d+)\s+(\d+\.\d+)\s+(\ d+\.\d{1,2})\s*(\d{1,6})\s
*(\d{1,8})\s+(\?|\S+)\s+([A-Z])\s+(\d+:\d+:\d+|\S\S\S
\d+)\s+(\d+:\d+)\s+(.*)$")
def splitpsline(line):
match = _psline.search(line)
if match:
owner, pid, cpu, mem, sz, rss, tt, s, start, time, command =
match.groups()
return owner, pid, cpu, mem, sz, rss, tt, s, start, time, command
watchedforpids = {}
processesmatrix = [ p for p in map(splitpsline, ps()) if p ]
for owner, pid, cpu, mem, sz, rss, tt, s, start, cputime, command in
processesmatrix:
basenamecmd = os.path.split(command)[1]
for watchedpid in pids:
if watchedpid == pid:
watchedforpids[pid] = command
for watchedforcmd in regexps:
if watchedforcmd.search(command) or
watchedforcmd.search(basenamecmd):
watchedforpids[pid] = command
while 1:
time.sleep(2)
foundpids = {}
processesmatrix = [ p for p in map(splitpsline, ps()) if p ]
for owner, pid, cpu, mem, sz, rss, tt, s, start, cputime, command in
processesmatrix:
for watchedpid in watchedforpids.keys():
if watchedpid == pid:
foundpids[pid] = command
if not foundpids:
break
print
for pid, command in foundpids.items():
print "PID[%s]:COMMAND[%s] still alive" % (pid, command)
time.sleep(58)
------------------------------------------------------------------------------
