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#!/usr/bin/env python
import optparse
import subprocess
import sys
parser = optparse.OptionParser(
usage = """
%prog [options]
""")
parser.add_option("-q", "--findqemu",
help = "find a qemu beneath the process <pid>",
action="store", dest="findqemu")
options, args = parser.parse_args(sys.argv)
if options.findqemu:
#
# Walk the process tree from the process specified looking for a qemu-system. Return its pid.
#
ps = subprocess.Popen(['ps', 'axww', '-o', 'pid,ppid,command'], stdout=subprocess.PIPE).communicate()[0]
processes = ps.split('\n')
nfields = len(processes[0].split()) - 1
pids = {}
commands = {}
for row in processes[1:]:
data = row.split(None, nfields)
if len(data) != 3:
continue
if data[1] not in pids:
pids[data[1]] = []
pids[data[1]].append(data[0])
commands[data[0]] = data[2]
if options.findqemu not in pids:
sys.stderr.write("No children found matching %s" % options.findqemu)
sys.exit(1)
parents = []
newparents = pids[options.findqemu]
while newparents:
next = []
for p in newparents:
if p in pids:
for n in pids[p]:
if n not in parents and n not in next:
next.append(n)
if p not in parents:
parents.append(p)
newparents = next
#print "Children matching %s:" % str(parents)
for p in parents:
if "qemu-system" in commands[p]:
print p
sys.exit(0)
sys.exit(1)
else:
parser.print_help()
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