mirror of
https://git.yoctoproject.org/poky
synced 2026-03-05 23:09:39 +01:00
e3ab221ee3
Increase the serial login timeout from 60 to 120s. This seems like a long time, however for a qemumips image with systemd+PAM and openssh, (e.g. core-image-sato-sdk + DISTRO=poky-altcfg), the getty connects to systemd's pam module which waits on logind and 45s for all this to happen at the same time as things like ssh key generation happens is not unknown. Increase the timeout to match the longer times we know these things can take in the worst case scenarios since we're tired of intermittent issues related to the serial login affecting the autobuilder. (From OE-Core rev: d8b4292db741de660f756dfb766210814d587b7a) Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
675 lines
28 KiB
Python
675 lines
28 KiB
Python
#
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# Copyright (C) 2013 Intel Corporation
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#
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# SPDX-License-Identifier: MIT
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#
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# This module provides a class for starting qemu images using runqemu.
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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 sys
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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 errno
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import string
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import threading
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import codecs
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import logging
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from oeqa.utils.dump import HostDumper
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from collections import defaultdict
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# Get Unicode non printable control chars
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control_range = list(range(0,32))+list(range(127,160))
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control_chars = [chr(x) for x in control_range
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if chr(x) not in string.printable]
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re_control_char = re.compile('[%s]' % re.escape("".join(control_chars)))
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class QemuRunner:
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def __init__(self, machine, rootfs, display, tmpdir, deploy_dir_image, logfile, boottime, dump_dir, dump_host_cmds,
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use_kvm, logger, use_slirp=False, serial_ports=2, boot_patterns = defaultdict(str), use_ovmf=False, workdir=None):
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# Popen object for runqemu
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self.runqemu = None
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self.runqemu_exited = False
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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 or runqemu output
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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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# target ip netmask
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self.netmask = 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.logged = False
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self.thread = None
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self.use_kvm = use_kvm
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self.use_ovmf = use_ovmf
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self.use_slirp = use_slirp
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self.serial_ports = serial_ports
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self.msg = ''
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self.boot_patterns = boot_patterns
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self.runqemutime = 120
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if not workdir:
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workdir = os.getcwd()
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self.qemu_pidfile = workdir + '/pidfile_' + str(os.getpid())
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self.host_dumper = HostDumper(dump_host_cmds, dump_dir)
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self.monitorpipe = None
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self.logger = logger
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# Enable testing other OS's
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# Set commands for target communication, and default to Linux ALWAYS
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# Other OS's or baremetal applications need to provide their
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# own implementation passing it through QemuRunner's constructor
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# or by passing them through TESTIMAGE_BOOT_PATTERNS[flag]
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# provided variables, where <flag> is one of the mentioned below.
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accepted_patterns = ['search_reached_prompt', 'send_login_user', 'search_login_succeeded', 'search_cmd_finished']
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default_boot_patterns = defaultdict(str)
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# Default to the usual paterns used to communicate with the target
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default_boot_patterns['search_reached_prompt'] = b' login:'
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default_boot_patterns['send_login_user'] = 'root\n'
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default_boot_patterns['search_login_succeeded'] = r"root@[a-zA-Z0-9\-]+:~#"
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default_boot_patterns['search_cmd_finished'] = r"[a-zA-Z0-9]+@[a-zA-Z0-9\-]+:~#"
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# Only override patterns that were set e.g. login user TESTIMAGE_BOOT_PATTERNS[send_login_user] = "webserver\n"
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for pattern in accepted_patterns:
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if not self.boot_patterns[pattern]:
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self.boot_patterns[pattern] = default_boot_patterns[pattern]
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def create_socket(self):
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try:
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sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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sock.setblocking(0)
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sock.bind(("127.0.0.1",0))
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sock.listen(2)
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port = sock.getsockname()[1]
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self.logger.debug("Created listening socket for qemu serial console on: 127.0.0.1:%s" % port)
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return (sock, port)
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except socket.error:
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sock.close()
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raise
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def log(self, msg):
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if self.logfile:
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# It is needed to sanitize the data received from qemu
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# because is possible to have control characters
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msg = msg.decode("utf-8", errors='ignore')
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msg = re_control_char.sub('', msg)
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self.msg += msg
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with codecs.open(self.logfile, "a", encoding="utf-8") as f:
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f.write("%s" % msg)
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def getOutput(self, o):
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import fcntl
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fl = fcntl.fcntl(o, fcntl.F_GETFL)
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fcntl.fcntl(o, fcntl.F_SETFL, fl | os.O_NONBLOCK)
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return os.read(o.fileno(), 1000000).decode("utf-8")
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def handleSIGCHLD(self, signum, frame):
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if self.runqemu and self.runqemu.poll():
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if self.runqemu.returncode:
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self.logger.error('runqemu exited with code %d' % self.runqemu.returncode)
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self.logger.error('Output from runqemu:\n%s' % self.getOutput(self.runqemu.stdout))
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self.stop()
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self._dump_host()
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def start(self, qemuparams = None, get_ip = True, extra_bootparams = None, runqemuparams='', launch_cmd=None, discard_writes=True):
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env = os.environ.copy()
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if self.display:
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env["DISPLAY"] = self.display
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# Set this flag so that Qemu doesn't do any grabs as SDL grabs
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# interact badly with screensavers.
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env["QEMU_DONT_GRAB"] = "1"
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if not os.path.exists(self.rootfs):
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self.logger.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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self.logger.error("Invalid TMPDIR path %s" % self.tmpdir)
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return False
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else:
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env["OE_TMPDIR"] = self.tmpdir
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if not os.path.exists(self.deploy_dir_image):
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self.logger.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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env["DEPLOY_DIR_IMAGE"] = self.deploy_dir_image
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if not launch_cmd:
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launch_cmd = 'runqemu %s' % ('snapshot' if discard_writes else '')
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if self.use_kvm:
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self.logger.debug('Using kvm for runqemu')
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launch_cmd += ' kvm'
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else:
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self.logger.debug('Not using kvm for runqemu')
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if not self.display:
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launch_cmd += ' nographic'
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if self.use_slirp:
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launch_cmd += ' slirp'
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if self.use_ovmf:
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launch_cmd += ' ovmf'
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launch_cmd += ' %s %s %s' % (runqemuparams, self.machine, self.rootfs)
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return self.launch(launch_cmd, qemuparams=qemuparams, get_ip=get_ip, extra_bootparams=extra_bootparams, env=env)
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def launch(self, launch_cmd, get_ip = True, qemuparams = None, extra_bootparams = None, env = None):
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try:
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if self.serial_ports >= 2:
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self.threadsock, threadport = self.create_socket()
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self.server_socket, self.serverport = self.create_socket()
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except socket.error as msg:
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self.logger.error("Failed to create listening socket: %s" % msg[1])
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return False
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bootparams = 'console=tty1 console=ttyS0,115200n8 printk.time=1'
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if extra_bootparams:
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bootparams = bootparams + ' ' + extra_bootparams
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# Ask QEMU to store the QEMU process PID in file, this way we don't have to parse running processes
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# and analyze descendents in order to determine it.
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if os.path.exists(self.qemu_pidfile):
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os.remove(self.qemu_pidfile)
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self.qemuparams = 'bootparams="{0}" qemuparams="-pidfile {1}"'.format(bootparams, self.qemu_pidfile)
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if qemuparams:
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self.qemuparams = self.qemuparams[:-1] + " " + qemuparams + " " + '\"'
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if self.serial_ports >= 2:
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launch_cmd += ' tcpserial=%s:%s %s' % (threadport, self.serverport, self.qemuparams)
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else:
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launch_cmd += ' tcpserial=%s %s' % (self.serverport, self.qemuparams)
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self.origchldhandler = signal.getsignal(signal.SIGCHLD)
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signal.signal(signal.SIGCHLD, self.handleSIGCHLD)
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self.logger.debug('launchcmd=%s'%(launch_cmd))
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# FIXME: We pass in stdin=subprocess.PIPE here to work around stty
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# blocking at the end of the runqemu script when using this within
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# oe-selftest (this makes stty error out immediately). There ought
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# to be a proper fix but this will suffice for now.
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self.runqemu = subprocess.Popen(launch_cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, stdin=subprocess.PIPE, preexec_fn=os.setpgrp, env=env)
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output = self.runqemu.stdout
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#
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# We need the preexec_fn above so that all runqemu processes can easily be killed
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# (by killing their process group). This presents a problem if this controlling
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# process itself is killed however since those processes don't notice the death
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# of the parent and merrily continue on.
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#
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# Rather than hack runqemu to deal with this, we add something here instead.
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# Basically we fork off another process which holds an open pipe to the parent
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# and also is setpgrp. If/when the pipe sees EOF from the parent dieing, it kills
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# the process group. This is like pctrl's PDEATHSIG but for a process group
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# rather than a single process.
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#
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r, w = os.pipe()
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self.monitorpid = os.fork()
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if self.monitorpid:
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os.close(r)
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self.monitorpipe = os.fdopen(w, "w")
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else:
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# child process
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os.setpgrp()
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os.close(w)
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r = os.fdopen(r)
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x = r.read()
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os.killpg(os.getpgid(self.runqemu.pid), signal.SIGTERM)
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sys.exit(0)
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self.logger.debug("runqemu started, pid is %s" % self.runqemu.pid)
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self.logger.debug("waiting at most %s seconds for qemu pid (%s)" %
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(self.runqemutime, time.strftime("%D %H:%M:%S")))
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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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if self.runqemu.poll():
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if self.runqemu_exited:
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return False
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if self.runqemu.returncode:
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# No point waiting any longer
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self.logger.warning('runqemu exited with code %d' % self.runqemu.returncode)
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self._dump_host()
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self.logger.warning("Output from runqemu:\n%s" % self.getOutput(output))
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self.stop()
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return False
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time.sleep(0.5)
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if self.runqemu_exited:
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return False
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if not self.is_alive():
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self.logger.error("Qemu pid didn't appear in %s seconds (%s)" %
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(self.runqemutime, time.strftime("%D %H:%M:%S")))
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qemu_pid = None
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if os.path.isfile(self.qemu_pidfile):
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with open(self.qemu_pidfile, 'r') as f:
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qemu_pid = f.read().strip()
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self.logger.error("Status information, poll status: %s, pidfile exists: %s, pidfile contents %s, proc pid exists %s"
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% (self.runqemu.poll(), os.path.isfile(self.qemu_pidfile), str(qemu_pid), os.path.exists("/proc/" + str(qemu_pid))))
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# Dump all processes to help us to figure out what is going on...
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ps = subprocess.Popen(['ps', 'axww', '-o', 'pid,ppid,pri,ni,command '], stdout=subprocess.PIPE).communicate()[0]
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processes = ps.decode("utf-8")
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self.logger.debug("Running processes:\n%s" % processes)
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self._dump_host()
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op = self.getOutput(output)
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self.stop()
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if op:
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self.logger.error("Output from runqemu:\n%s" % op)
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else:
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self.logger.error("No output from runqemu.\n")
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return False
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# We are alive: qemu is running
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out = self.getOutput(output)
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netconf = False # network configuration is not required by default
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self.logger.debug("qemu started in %s seconds - qemu procces pid is %s (%s)" %
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(time.time() - (endtime - self.runqemutime),
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self.qemupid, time.strftime("%D %H:%M:%S")))
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cmdline = ''
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if get_ip:
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with open('/proc/%s/cmdline' % self.qemupid) as p:
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cmdline = p.read()
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# It is needed to sanitize the data received
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# because is possible to have control characters
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cmdline = re_control_char.sub(' ', cmdline)
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try:
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if self.use_slirp:
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tcp_ports = cmdline.split("hostfwd=tcp::")[1]
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host_port = tcp_ports[:tcp_ports.find('-')]
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self.ip = "localhost:%s" % host_port
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else:
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ips = re.findall(r"((?:[0-9]{1,3}\.){3}[0-9]{1,3})", cmdline.split("ip=")[1])
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self.ip = ips[0]
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self.server_ip = ips[1]
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self.logger.debug("qemu cmdline used:\n{}".format(cmdline))
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except (IndexError, ValueError):
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# Try to get network configuration from runqemu output
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match = re.match(r'.*Network configuration: (?:ip=)*([0-9.]+)::([0-9.]+):([0-9.]+)$.*',
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out, re.MULTILINE|re.DOTALL)
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if match:
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self.ip, self.server_ip, self.netmask = match.groups()
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# network configuration is required as we couldn't get it
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# from the runqemu command line, so qemu doesn't run kernel
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# and guest networking is not configured
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netconf = True
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else:
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self.logger.error("Couldn't get ip from qemu command line and runqemu output! "
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"Here is the qemu command line used:\n%s\n"
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"and output from runqemu:\n%s" % (cmdline, out))
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self._dump_host()
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self.stop()
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return False
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self.logger.debug("Target IP: %s" % self.ip)
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self.logger.debug("Server IP: %s" % self.server_ip)
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if self.serial_ports >= 2:
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self.thread = LoggingThread(self.log, self.threadsock, self.logger)
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self.thread.start()
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if not self.thread.connection_established.wait(self.boottime):
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self.logger.error("Didn't receive a console connection from qemu. "
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"Here is the qemu command line used:\n%s\nand "
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"output from runqemu:\n%s" % (cmdline, out))
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self.stop_thread()
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return False
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self.logger.debug("Output from runqemu:\n%s", out)
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self.logger.debug("Waiting at most %d seconds for login banner (%s)" %
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(self.boottime, time.strftime("%D %H:%M:%S")))
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endtime = time.time() + self.boottime
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socklist = [self.server_socket]
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reachedlogin = False
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stopread = False
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qemusock = None
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bootlog = b''
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data = b''
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while time.time() < endtime and not stopread:
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try:
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sread, swrite, serror = select.select(socklist, [], [], 5)
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except InterruptedError:
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continue
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for sock in sread:
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if sock is self.server_socket:
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qemusock, addr = self.server_socket.accept()
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qemusock.setblocking(0)
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socklist.append(qemusock)
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socklist.remove(self.server_socket)
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self.logger.debug("Connection from %s:%s" % addr)
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else:
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data = data + sock.recv(1024)
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if data:
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bootlog += data
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if self.serial_ports < 2:
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# this socket has mixed console/kernel data, log it to logfile
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self.log(data)
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data = b''
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if self.boot_patterns['search_reached_prompt'] in bootlog:
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self.server_socket = qemusock
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stopread = True
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reachedlogin = True
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self.logger.debug("Reached login banner in %s seconds (%s)" %
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(time.time() - (endtime - self.boottime),
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time.strftime("%D %H:%M:%S")))
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else:
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# no need to check if reachedlogin unless we support multiple connections
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self.logger.debug("QEMU socket disconnected before login banner reached. (%s)" %
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time.strftime("%D %H:%M:%S"))
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socklist.remove(sock)
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sock.close()
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stopread = True
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if not reachedlogin:
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if time.time() >= endtime:
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self.logger.warning("Target didn't reach login banner in %d seconds (%s)" %
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(self.boottime, time.strftime("%D %H:%M:%S")))
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tail = lambda l: "\n".join(l.splitlines()[-25:])
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bootlog = bootlog.decode("utf-8")
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# in case bootlog is empty, use tail qemu log store at self.msg
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lines = tail(bootlog if bootlog else self.msg)
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self.logger.warning("Last 25 lines of text:\n%s" % lines)
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self.logger.warning("Check full boot log: %s" % self.logfile)
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self._dump_host()
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self.stop()
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return False
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# If we are not able to login the tests can continue
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try:
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(status, output) = self.run_serial(self.boot_patterns['send_login_user'], raw=True, timeout=120)
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if re.search(self.boot_patterns['search_login_succeeded'], output):
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self.logged = True
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self.logger.debug("Logged as root in serial console")
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if netconf:
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# configure guest networking
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cmd = "ifconfig eth0 %s netmask %s up\n" % (self.ip, self.netmask)
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output = self.run_serial(cmd, raw=True)[1]
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if re.search(r"root@[a-zA-Z0-9\-]+:~#", output):
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self.logger.debug("configured ip address %s", self.ip)
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else:
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self.logger.debug("Couldn't configure guest networking")
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else:
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self.logger.warning("Couldn't login into serial console"
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" as root using blank password")
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self.logger.warning("The output:\n%s" % output)
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except:
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self.logger.warning("Serial console failed while trying to login")
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return True
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def stop(self):
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if hasattr(self, "origchldhandler"):
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signal.signal(signal.SIGCHLD, self.origchldhandler)
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self.stop_thread()
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self.stop_qemu_system()
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if self.runqemu:
|
|
if hasattr(self, "monitorpid"):
|
|
os.kill(self.monitorpid, signal.SIGKILL)
|
|
self.logger.debug("Sending SIGTERM to runqemu")
|
|
try:
|
|
os.killpg(os.getpgid(self.runqemu.pid), signal.SIGTERM)
|
|
except OSError as e:
|
|
if e.errno != errno.ESRCH:
|
|
raise
|
|
endtime = time.time() + self.runqemutime
|
|
while self.runqemu.poll() is None and time.time() < endtime:
|
|
time.sleep(1)
|
|
if self.runqemu.poll() is None:
|
|
self.logger.debug("Sending SIGKILL to runqemu")
|
|
os.killpg(os.getpgid(self.runqemu.pid), signal.SIGKILL)
|
|
self.runqemu.stdin.close()
|
|
self.runqemu.stdout.close()
|
|
self.runqemu_exited = True
|
|
|
|
if hasattr(self, 'server_socket') and self.server_socket:
|
|
self.server_socket.close()
|
|
self.server_socket = None
|
|
if hasattr(self, 'threadsock') and self.threadsock:
|
|
self.threadsock.close()
|
|
self.threadsock = None
|
|
self.qemupid = None
|
|
self.ip = None
|
|
if os.path.exists(self.qemu_pidfile):
|
|
try:
|
|
os.remove(self.qemu_pidfile)
|
|
except FileNotFoundError as e:
|
|
# We raced, ignore
|
|
pass
|
|
if self.monitorpipe:
|
|
self.monitorpipe.close()
|
|
|
|
def stop_qemu_system(self):
|
|
if self.qemupid:
|
|
try:
|
|
# qemu-system behaves well and a SIGTERM is enough
|
|
os.kill(self.qemupid, signal.SIGTERM)
|
|
except ProcessLookupError as e:
|
|
self.logger.warning('qemu-system ended unexpectedly')
|
|
|
|
def stop_thread(self):
|
|
if self.thread and self.thread.is_alive():
|
|
self.thread.stop()
|
|
self.thread.join()
|
|
|
|
def restart(self, qemuparams = None):
|
|
self.logger.warning("Restarting qemu process")
|
|
if self.runqemu.poll() is None:
|
|
self.stop()
|
|
if self.start(qemuparams):
|
|
return True
|
|
return False
|
|
|
|
def is_alive(self):
|
|
if not self.runqemu or self.runqemu.poll() is not None or self.runqemu_exited:
|
|
return False
|
|
if os.path.isfile(self.qemu_pidfile):
|
|
# when handling pidfile, qemu creates the file, stat it, lock it and then write to it
|
|
# so it's possible that the file has been created but the content is empty
|
|
pidfile_timeout = time.time() + 3
|
|
while time.time() < pidfile_timeout:
|
|
with open(self.qemu_pidfile, 'r') as f:
|
|
qemu_pid = f.read().strip()
|
|
# file created but not yet written contents
|
|
if not qemu_pid:
|
|
time.sleep(0.5)
|
|
continue
|
|
else:
|
|
if os.path.exists("/proc/" + qemu_pid):
|
|
self.qemupid = int(qemu_pid)
|
|
return True
|
|
return False
|
|
|
|
def run_serial(self, command, raw=False, timeout=60):
|
|
# We assume target system have echo to get command status
|
|
if not raw:
|
|
command = "%s; echo $?\n" % command
|
|
|
|
data = ''
|
|
status = 0
|
|
self.server_socket.sendall(command.encode('utf-8'))
|
|
start = time.time()
|
|
end = start + timeout
|
|
while True:
|
|
now = time.time()
|
|
if now >= end:
|
|
data += "<<< run_serial(): command timed out after %d seconds without output >>>\r\n\r\n" % timeout
|
|
break
|
|
try:
|
|
sread, _, _ = select.select([self.server_socket],[],[], end - now)
|
|
except InterruptedError:
|
|
continue
|
|
if sread:
|
|
answer = self.server_socket.recv(1024)
|
|
if answer:
|
|
data += answer.decode('utf-8')
|
|
# Search the prompt to stop
|
|
if re.search(self.boot_patterns['search_cmd_finished'], data):
|
|
break
|
|
else:
|
|
raise Exception("No data on serial console socket")
|
|
|
|
if data:
|
|
if raw:
|
|
status = 1
|
|
else:
|
|
# Remove first line (command line) and last line (prompt)
|
|
data = data[data.find('$?\r\n')+4:data.rfind('\r\n')]
|
|
index = data.rfind('\r\n')
|
|
if index == -1:
|
|
status_cmd = data
|
|
data = ""
|
|
else:
|
|
status_cmd = data[index+2:]
|
|
data = data[:index]
|
|
if (status_cmd == "0"):
|
|
status = 1
|
|
return (status, str(data))
|
|
|
|
|
|
def _dump_host(self):
|
|
self.host_dumper.create_dir("qemu")
|
|
self.logger.warning("Qemu ended unexpectedly, dump data from host"
|
|
" is in %s" % self.host_dumper.dump_dir)
|
|
self.host_dumper.dump_host()
|
|
|
|
# This class is for reading data from a socket and passing it to logfunc
|
|
# to be processed. It's completely event driven and has a straightforward
|
|
# event loop. The mechanism for stopping the thread is a simple pipe which
|
|
# will wake up the poll and allow for tearing everything down.
|
|
class LoggingThread(threading.Thread):
|
|
def __init__(self, logfunc, sock, logger):
|
|
self.connection_established = threading.Event()
|
|
self.serversock = sock
|
|
self.logfunc = logfunc
|
|
self.logger = logger
|
|
self.readsock = None
|
|
self.running = False
|
|
|
|
self.errorevents = select.POLLERR | select.POLLHUP | select.POLLNVAL
|
|
self.readevents = select.POLLIN | select.POLLPRI
|
|
|
|
threading.Thread.__init__(self, target=self.threadtarget)
|
|
|
|
def threadtarget(self):
|
|
try:
|
|
self.eventloop()
|
|
finally:
|
|
self.teardown()
|
|
|
|
def run(self):
|
|
self.logger.debug("Starting logging thread")
|
|
self.readpipe, self.writepipe = os.pipe()
|
|
threading.Thread.run(self)
|
|
|
|
def stop(self):
|
|
self.logger.debug("Stopping logging thread")
|
|
if self.running:
|
|
os.write(self.writepipe, bytes("stop", "utf-8"))
|
|
|
|
def teardown(self):
|
|
self.logger.debug("Tearing down logging thread")
|
|
self.close_socket(self.serversock)
|
|
|
|
if self.readsock is not None:
|
|
self.close_socket(self.readsock)
|
|
|
|
self.close_ignore_error(self.readpipe)
|
|
self.close_ignore_error(self.writepipe)
|
|
self.running = False
|
|
|
|
def eventloop(self):
|
|
poll = select.poll()
|
|
event_read_mask = self.errorevents | self.readevents
|
|
poll.register(self.serversock.fileno())
|
|
poll.register(self.readpipe, event_read_mask)
|
|
|
|
breakout = False
|
|
self.running = True
|
|
self.logger.debug("Starting thread event loop")
|
|
while not breakout:
|
|
events = poll.poll()
|
|
for event in events:
|
|
# An error occurred, bail out
|
|
if event[1] & self.errorevents:
|
|
raise Exception(self.stringify_event(event[1]))
|
|
|
|
# Event to stop the thread
|
|
if self.readpipe == event[0]:
|
|
self.logger.debug("Stop event received")
|
|
breakout = True
|
|
break
|
|
|
|
# A connection request was received
|
|
elif self.serversock.fileno() == event[0]:
|
|
self.logger.debug("Connection request received")
|
|
self.readsock, _ = self.serversock.accept()
|
|
self.readsock.setblocking(0)
|
|
poll.unregister(self.serversock.fileno())
|
|
poll.register(self.readsock.fileno(), event_read_mask)
|
|
|
|
self.logger.debug("Setting connection established event")
|
|
self.connection_established.set()
|
|
|
|
# Actual data to be logged
|
|
elif self.readsock.fileno() == event[0]:
|
|
data = self.recv(1024)
|
|
self.logfunc(data)
|
|
|
|
# Since the socket is non-blocking make sure to honor EAGAIN
|
|
# and EWOULDBLOCK.
|
|
def recv(self, count):
|
|
try:
|
|
data = self.readsock.recv(count)
|
|
except socket.error as e:
|
|
if e.errno == errno.EAGAIN or e.errno == errno.EWOULDBLOCK:
|
|
return ''
|
|
else:
|
|
raise
|
|
|
|
if data is None:
|
|
raise Exception("No data on read ready socket")
|
|
elif not data:
|
|
# This actually means an orderly shutdown
|
|
# happened. But for this code it counts as an
|
|
# error since the connection shouldn't go away
|
|
# until qemu exits.
|
|
raise Exception("Console connection closed unexpectedly")
|
|
|
|
return data
|
|
|
|
def stringify_event(self, event):
|
|
val = ''
|
|
if select.POLLERR == event:
|
|
val = 'POLLER'
|
|
elif select.POLLHUP == event:
|
|
val = 'POLLHUP'
|
|
elif select.POLLNVAL == event:
|
|
val = 'POLLNVAL'
|
|
return val
|
|
|
|
def close_socket(self, sock):
|
|
sock.shutdown(socket.SHUT_RDWR)
|
|
sock.close()
|
|
|
|
def close_ignore_error(self, fd):
|
|
try:
|
|
os.close(fd)
|
|
except OSError:
|
|
pass
|