forked from brl/citadel
177 lines
6.4 KiB
Python
177 lines
6.4 KiB
Python
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# Copyright (C) 2015 Intel Corporation
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#
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# Released under the MIT license (see COPYING.MIT)
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# This module provides a class for starting qemu images of poky tiny.
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# It's used by testimage.bbclass.
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import subprocess
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import os
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import time
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import signal
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import re
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import socket
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import select
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import bb
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from .qemurunner import QemuRunner
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class QemuTinyRunner(QemuRunner):
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def __init__(self, machine, rootfs, display, tmpdir, deploy_dir_image, logfile, kernel, boottime, logger):
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# Popen object for runqemu
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self.runqemu = None
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# pid of the qemu process that runqemu will start
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self.qemupid = None
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# target ip - from the command line
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self.ip = None
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# host ip - where qemu is running
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self.server_ip = None
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self.machine = machine
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self.rootfs = rootfs
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self.display = display
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self.tmpdir = tmpdir
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self.deploy_dir_image = deploy_dir_image
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self.logfile = logfile
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self.boottime = boottime
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self.runqemutime = 60
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self.socketfile = "console.sock"
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self.server_socket = None
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self.kernel = kernel
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self.logger = logger
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def create_socket(self):
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tries = 3
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while tries > 0:
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try:
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self.server_socket = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
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self.server_socket.connect(self.socketfile)
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bb.note("Created listening socket for qemu serial console.")
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tries = 0
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except socket.error as msg:
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self.server_socket.close()
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bb.fatal("Failed to create listening socket.")
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tries -= 1
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def log(self, msg):
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if self.logfile:
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with open(self.logfile, "a") as f:
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f.write("%s" % msg)
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def start(self, qemuparams = None, ssh=True, extra_bootparams=None, runqemuparams='', discard_writes=True):
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if self.display:
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os.environ["DISPLAY"] = self.display
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else:
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bb.error("To start qemu I need a X desktop, please set DISPLAY correctly (e.g. DISPLAY=:1)")
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return False
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if not os.path.exists(self.rootfs):
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bb.error("Invalid rootfs %s" % self.rootfs)
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return False
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if not os.path.exists(self.tmpdir):
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bb.error("Invalid TMPDIR path %s" % self.tmpdir)
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return False
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else:
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os.environ["OE_TMPDIR"] = self.tmpdir
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if not os.path.exists(self.deploy_dir_image):
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bb.error("Invalid DEPLOY_DIR_IMAGE path %s" % self.deploy_dir_image)
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return False
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else:
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os.environ["DEPLOY_DIR_IMAGE"] = self.deploy_dir_image
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# Set this flag so that Qemu doesn't do any grabs as SDL grabs interact
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# badly with screensavers.
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os.environ["QEMU_DONT_GRAB"] = "1"
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self.qemuparams = '--append "root=/dev/ram0 console=ttyS0" -nographic -serial unix:%s,server,nowait' % self.socketfile
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launch_cmd = 'qemu-system-i386 -kernel %s -initrd %s %s' % (self.kernel, self.rootfs, self.qemuparams)
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self.runqemu = subprocess.Popen(launch_cmd,shell=True,stdout=subprocess.PIPE,stderr=subprocess.STDOUT,preexec_fn=os.setpgrp)
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bb.note("runqemu started, pid is %s" % self.runqemu.pid)
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bb.note("waiting at most %s seconds for qemu pid" % self.runqemutime)
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endtime = time.time() + self.runqemutime
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while not self.is_alive() and time.time() < endtime:
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time.sleep(1)
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if self.is_alive():
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bb.note("qemu started - qemu procces pid is %s" % self.qemupid)
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self.create_socket()
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else:
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bb.note("Qemu pid didn't appeared in %s seconds" % self.runqemutime)
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output = self.runqemu.stdout
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self.stop()
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bb.note("Output from runqemu:\n%s" % output.read().decode("utf-8"))
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return False
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return self.is_alive()
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def run_serial(self, command, timeout=5):
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self.server_socket.sendall(command+'\n')
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data = ''
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status = 0
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stopread = False
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endtime = time.time()+timeout
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while time.time()<endtime and not stopread:
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try:
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sread, _, _ = select.select([self.server_socket],[],[],1)
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except InterruptedError:
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continue
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for sock in sread:
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answer = sock.recv(1024)
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if answer:
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data += answer
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else:
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sock.close()
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stopread = True
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if not data:
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status = 1
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if not stopread:
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data += "<<< run_serial(): command timed out after %d seconds without output >>>\r\n\r\n" % timeout
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return (status, str(data))
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def find_child(self,parent_pid):
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#
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# Walk the process tree from the process specified looking for a qemu-system. Return its [pid'cmd]
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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.decode("utf-8").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 parent_pid not in pids:
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return []
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parents = []
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newparents = pids[parent_pid]
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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 runs "ldd qemu-system-xxxx"
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# Also, old versions of ldd (2.11) run "LD_XXXX 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 and "-serial unix" in commands[p]:
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return [int(p),commands[p]]
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