mirror of
https://github.com/virt-manager/virt-manager.git
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128 lines
4.4 KiB
Python
128 lines
4.4 KiB
Python
#
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# Copyright 2006-2009, 2013, 2014 Red Hat, Inc.
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# Daniel P. Berrange <berrange@redhat.com>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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# MA 02110-1301 USA.
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import logging
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import os
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import shutil
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import subprocess
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import tempfile
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def _rhel4_initrd_inject(initrd, injections):
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try:
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file_proc = subprocess.Popen(["file", "-z", initrd],
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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s = bytes("ext2 filesystem", "ascii")
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if s not in file_proc.communicate()[0]:
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return False
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except Exception:
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logging.exception("Failed to file command for rhel4 initrd detection")
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return False
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logging.debug("Is RHEL4 initrd")
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# Uncompress the initrd
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newinitrd = open(initrd + ".new", "wb")
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gzip_proc = subprocess.Popen(["gzip", "-d", "-f", "-c", initrd],
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stdout=newinitrd,
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stderr=subprocess.PIPE)
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gzip_proc.wait()
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newinitrd.close()
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debugfserr = bytes()
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for filename in injections:
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# We have an ext2 filesystem, use debugfs to inject files
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cmd = ["debugfs", "-w", "-R",
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"write %s %s" % (filename, os.path.basename(filename)),
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newinitrd.name]
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logging.debug("Copying %s to the initrd with cmd=%s", filename, cmd)
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debugfs_proc = subprocess.Popen(cmd,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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debugfs_proc.wait()
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debugfserr += debugfs_proc.stderr.read() or bytes()
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gziperr = gzip_proc.stderr.read()
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if gziperr:
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logging.debug("gzip stderr=%s", gziperr)
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if debugfserr:
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logging.debug("debugfs stderr=%s", debugfserr)
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# Recompress the initrd
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gzip_proc = subprocess.Popen(["gzip"],
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stdin=open(newinitrd.name, "rb"),
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stdout=open(initrd, "wb"),
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stderr=subprocess.PIPE)
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gzip_proc.wait()
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gziperr = gzip_proc.stderr.read()
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if gziperr:
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logging.debug("gzip stderr=%s", gziperr)
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os.unlink(newinitrd.name)
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return True
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def perform_initrd_injections(initrd, injections, scratchdir):
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"""
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Insert files into the root directory of the initial ram disk
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"""
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if not injections:
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return
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if _rhel4_initrd_inject(initrd, injections):
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return
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tempdir = tempfile.mkdtemp(dir=scratchdir)
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os.chmod(tempdir, 0o775)
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for filename in injections:
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logging.debug("Copying %s to the initrd.", filename)
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shutil.copy(filename, tempdir)
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logging.debug("Appending to the initrd.")
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find_proc = subprocess.Popen(['find', '.', '-print0'],
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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cwd=tempdir)
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cpio_proc = subprocess.Popen(['cpio', '-o', '--null', '-Hnewc', '--quiet'],
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stdin=find_proc.stdout,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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cwd=tempdir)
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f = open(initrd, 'ab')
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gzip_proc = subprocess.Popen(['gzip'], stdin=cpio_proc.stdout,
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stdout=f, stderr=subprocess.PIPE)
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cpio_proc.wait()
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find_proc.wait()
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gzip_proc.wait()
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f.close()
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shutil.rmtree(tempdir)
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finderr = find_proc.stderr.read()
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cpioerr = cpio_proc.stderr.read()
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gziperr = gzip_proc.stderr.read()
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if finderr:
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logging.debug("find stderr=%s", finderr)
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if cpioerr:
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logging.debug("cpio stderr=%s", cpioerr)
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if gziperr:
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logging.debug("gzip stderr=%s", gziperr)
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