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0b57f39088
runqemu-internal runs "ldd qemu-system xxx" and the detection code was returning this as the PID of qemu. This patch improves the detection code to avoid this problem, fixing certain race type failures on the autobuilder. (From OE-Core rev: fc914a6fb3204f8b5bdfc0f56364606673d5356a) Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
66 lines
1.8 KiB
Python
Executable File
66 lines
1.8 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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import os
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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', 'axww', '-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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# Need to be careful here since runqemu-internal runs "ldd qemu-system-xxxx"
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basecmd = commands[p].split()[0]
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basecmd = os.path.basename(basecmd)
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if "qemu-system" in basecmd:
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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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