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d76a3f534d
The helper script was printing an error to stdout when it couldn't find any qemu child processes; output this error to stderr instead and redirect stderr to /dev/null when running from qemuimage-testlib so that QEMUPID is actually blank if there are no qemu instances found. (From OE-Core rev: 21edf5ec12d8307c528f157c8e078dbefe25d1ef) Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
62 lines
1.6 KiB
Python
Executable File
62 lines
1.6 KiB
Python
Executable File
#!/usr/bin/env python
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import optparse
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import subprocess
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import sys
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parser = optparse.OptionParser(
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usage = """
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%prog [options]
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""")
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parser.add_option("-q", "--findqemu",
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help = "find a qemu beneath the process <pid>",
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action="store", dest="findqemu")
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options, args = parser.parse_args(sys.argv)
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if options.findqemu:
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#
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# Walk the process tree from the process specified looking for a qemu-system. Return its pid.
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#
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ps = subprocess.Popen(['ps', 'ax', '-o', 'pid,ppid,command'], stdout=subprocess.PIPE).communicate()[0]
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processes = ps.split('\n')
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nfields = len(processes[0].split()) - 1
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pids = {}
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commands = {}
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for row in processes[1:]:
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data = row.split(None, nfields)
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if len(data) != 3:
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continue
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if data[1] not in pids:
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pids[data[1]] = []
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pids[data[1]].append(data[0])
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commands[data[0]] = data[2]
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if options.findqemu not in pids:
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sys.stderr.write("No children found matching %s" % options.findqemu)
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sys.exit(1)
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parents = []
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newparents = pids[options.findqemu]
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while newparents:
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next = []
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for p in newparents:
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if p in pids:
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for n in pids[p]:
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if n not in parents and n not in next:
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next.append(n)
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if p not in parents:
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parents.append(p)
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newparents = next
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#print "Children matching %s:" % str(parents)
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for p in parents:
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if "qemu-system" in commands[p]:
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print p
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sys.exit(0)
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sys.exit(1)
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else:
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parser.print_help()
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