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import subprocess
import optparse
import sys
import os
import time
import signal
import re
import bb
from oeqa.utils.oeqemuconsole import oeQemuConsole
class QemuRunner:
def __init__(self, machine, rootfs, display = None, tmpdir = None, logfile = None):
# Popen object
self.runqemu = None
self.machine = machine
self.rootfs = rootfs
self.streampath = '/tmp/qemuconnection.%s' % os.getpid()
self.qemuparams = 'bootparams="console=ttyS0" qemuparams="-snapshot -serial unix:%s,server,nowait"' % self.streampath
self.qemupid = None
self.ip = None
self.display = display
self.tmpdir = tmpdir
self.logfile = logfile
def launch(self, qemuparams = None):
if qemuparams:
self.qemuparams = self.qemuparams[:-1] + " " + qemuparams + " " + '\"'
if self.display:
os.environ["DISPLAY"] = self.display
else:
bb.error("To start qemu I need a X desktop, please set DISPLAY correctly (e.g. DISPLAY=:1)")
return False
if not os.path.exists(self.rootfs):
bb.error("Invalid rootfs %s" % self.rootfs)
return False
if not os.path.exists(self.tmpdir):
bb.error("Invalid TMPDIR path %s" % self.tmpdir)
return False
else:
os.environ["OE_TMPDIR"] = self.tmpdir
launch_cmd = 'runqemu %s %s %s' % (self.machine, self.rootfs, self.qemuparams)
self.runqemu = subprocess.Popen(launch_cmd,shell=True,stdout=subprocess.PIPE,stderr=subprocess.STDOUT,preexec_fn=os.setpgrp)
bb.note("runqemu started, pid is %s" % self.runqemu.pid)
# wait at most 30 seconds until qemu pid appears
bb.note("waiting at most 60 seconds for qemu pid")
endtime = time.time() + 60
while not self.is_alive() and time.time() < endtime:
time.sleep(1)
if self.is_alive():
bb.note("qemu started - qemu procces pid is %s" % self.qemupid)
console = oeQemuConsole(self.streampath, self.logfile)
bb.note("Waiting at most 200 seconds for login banner")
(match, text) = console.read_all_timeout("login:", 200)
if match:
bb.note("Reached login banner")
console.write("root\n")
(index, match, text) = console.expect([r"(root@[\w-]+:~#)"],10)
if not match:
bb.note("Couldn't get prompt, all I got was:\n%s" % match.group(0))
return False
console.write("ip addr show eth0 | sed -n '3p' | awk '{ print $2 }' | cut -f 1 -d \"/\"\n")
(index, match, text) = console.expect([r"((?:[0-9]{1,3}\.){3}[0-9]{1,3})"],10)
console.close()
if match:
self.ip = match.group(0)
bb.note("Ip found: %s" % self.ip)
else:
bb.note("Couldn't determine ip, all I got was:\n%s" % text)
return False
else:
console.close()
bb.note("Target didn't reached login boot in 120 seconds")
lines = "\n".join(text.splitlines()[-5:])
bb.note("Last 5 lines of text:\n%s" % lines)
bb.note("Check full boot log: %s" % self.logfile)
return False
else:
bb.note("Qemu pid didn't appeared in 30 seconds")
self.runqemu.terminate()
self.runqemu.kill()
bb.note("Output from runqemu: %s " % self.runqemu.stdout.read())
self.runqemu.stdout.close()
return False
return self.is_alive()
def kill(self):
if self.runqemu:
os.kill(-self.runqemu.pid,signal.SIGTERM)
self.qemupid = None
self.ip = None
if os.path.exists(self.streampath):
os.remove(self.streampath)
def restart(self, qemuparams = None):
if self.is_alive():
self.kill()
bb.note("Qemu Restart required...")
return self.launch(qemuparams)
def is_alive(self):
qemu_child = self.find_child(str(self.runqemu.pid))
if qemu_child:
self.qemupid = qemu_child[0]
if os.path.exists("/proc/" + str(self.qemupid)) and os.path.exists(self.streampath):
return True
return False
def find_child(self,parent_pid):
#
# Walk the process tree from the process specified looking for a qemu-system. Return its [pid'cmd]
#
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 parent_pid not in pids:
sys.stderr.write("No children found matching %s\n" % parent_pid)
return []
parents = []
newparents = pids[parent_pid]
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:
# Need to be careful here since runqemu-internal runs "ldd qemu-system-xxxx"
# Also, old versions of ldd (2.11) run "LD_XXXX qemu-system-xxxx"
basecmd = commands[p].split()[0]
basecmd = os.path.basename(basecmd)
if "qemu-system" in basecmd and "-serial unix" in commands[p]:
return [int(p),commands[p]]
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