--- /dev/null
+#!/usr/bin/python
+#
+# Copyright (c) 2003 Intel Corporation
+# All rights reserved.
+#
+# Copyright (c) 2004-2006 The Trustees of Princeton University
+# All rights reserved.
+# expected /proc/partitions format
+
+import os, sys, shutil
+import subprocess
+import shlex
+import socket
+import fcntl
+import string
+import exceptions
+
+from Exceptions import *
+
+####################
+# the simplest way to debug is to let the node take off,
+# ssh into it as root using the debug ssh key in /etc/planetlab
+# then go to /tmp/source
+# edit this file locally to turn on breakpoints if needed, then run
+# ./BootManager.py
+####################
+
+### handling breakpoints in the startup process
+import select, sys, string
+
+### global debugging settings
+
+# enabling this will cause the node to ask for breakpoint-mode at startup
+# production code should read False/False
+PROMPT_MODE=False
+# default for when prompt is turned off, or it's on but the timeout triggers
+BREAKPOINT_MODE=False
+
+# verbose mode is just fine
+VERBOSE_MODE=True
+# in seconds : if no input, proceed
+PROMPT_TIMEOUT=5
+
+def prompt_for_breakpoint_mode ():
+
+ global BREAKPOINT_MODE
+ if PROMPT_MODE:
+ default_answer=BREAKPOINT_MODE
+ answer=''
+ if BREAKPOINT_MODE:
+ display="[y]/n"
+ else:
+ display="y/[n]"
+ sys.stdout.write ("Want to run in breakpoint mode ? %s "%display)
+ sys.stdout.flush()
+ r,w,e = select.select ([sys.stdin],[],[],PROMPT_TIMEOUT)
+ if r:
+ answer = string.strip(sys.stdin.readline())
+ else:
+ sys.stdout.write("\nTimed-out (%d s)"%PROMPT_TIMEOUT)
+ if answer:
+ BREAKPOINT_MODE = ( answer == "y" or answer == "Y")
+ else:
+ BREAKPOINT_MODE = default_answer
+ label="Off"
+ if BREAKPOINT_MODE:
+ label="On"
+ sys.stdout.write("\nCurrent BREAKPOINT_MODE is %s\n"%label)
+
+def breakpoint (message, cmd = None):
+
+ if BREAKPOINT_MODE:
+
+ if cmd is None:
+ cmd="/bin/sh"
+ message=message+" -- Entering bash - type ^D to proceed"
+
+ print message
+ os.system(cmd)
+
+
+########################################
+def makedirs( path ):
+ """
+ from python docs for os.makedirs:
+ Throws an error exception if the leaf directory
+ already exists or cannot be created.
+
+ That is real useful. Instead, we'll create the directory, then use a
+ separate function to test for its existance.
+
+ Return 1 if the directory exists and/or has been created, a BootManagerException
+ otherwise. Does not test the writability of said directory.
+ """
+ try:
+ os.makedirs( path )
+ except OSError:
+ pass
+ try:
+ os.listdir( path )
+ except OSError:
+ raise BootManagerException, "Unable to create directory tree: %s" % path
+
+ return 1
+
+
+
+def removedir( path ):
+ """
+ remove a directory tree, return 1 if successful, a BootManagerException
+ if failure.
+ """
+ try:
+ os.listdir( path )
+ except OSError:
+ return 1
+
+ try:
+ shutil.rmtree( path )
+ except OSError, desc:
+ raise BootManagerException, "Unable to remove directory tree: %s" % path
+
+ return 1
+
+
+def sysexec( cmd, log=None, fsck=False, shell=False ):
+ """
+ execute a system command, output the results to the logger
+ if log <> None
+
+ return 1 if command completed (return code of non-zero),
+ 0 if failed. A BootManagerException is raised if the command
+ was unable to execute or was interrupted by the user with Ctrl+C
+ """
+ try:
+ # Thierry - Jan. 6 2011
+ # would probably make sense to look for | here as well
+ # however this is fragile and hard to test thoroughly
+ # let the caller set 'shell' when that is desirable
+ if shell or cmd.__contains__(">"):
+ prog = subprocess.Popen(cmd, shell=True)
+ if log is not None:
+ log.write("sysexec (shell mode) >>> %s" % cmd)
+ if VERBOSE_MODE:
+ print "sysexec (shell mode) >>> %s" % cmd
+ else:
+ prog = subprocess.Popen(shlex.split(cmd), stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+ if log is not None:
+ log.write("sysexec >>> %s\n" % cmd)
+ if VERBOSE_MODE:
+ print "sysexec >>> %s" % cmd
+ except OSError:
+ raise BootManagerException, \
+ "Unable to create instance of subprocess.Popen " \
+ "for command: %s" % cmd
+ try:
+ (stdoutdata, stderrdata) = prog.communicate()
+ except KeyboardInterrupt:
+ raise BootManagerException, "Interrupted by user"
+
+ # log stdout & stderr
+ if log is not None:
+ if stdoutdata:
+ log.write("==========stdout\n"+stdoutdata)
+ if stderrdata:
+ log.write("==========stderr\n"+stderrdata)
+
+ returncode = prog.wait()
+
+ if fsck:
+ # The exit code returned by fsck is the sum of the following conditions:
+ # 0 - No errors
+ # 1 - File system errors corrected
+ # 2 - System should be rebooted
+ # 4 - File system errors left uncorrected
+ # 8 - Operational error
+ # 16 - Usage or syntax error
+ # 32 - Fsck canceled by user request
+ # 128 - Shared library error
+ if returncode != 0 and returncode != 1:
+ raise BootManagerException, "Running %s failed (rc=%d)" % (cmd,returncode)
+ else:
+ if returncode != 0:
+ raise BootManagerException, "Running %s failed (rc=%d)" % (cmd,returncode)
+
+ prog = None
+ return 1
+
+
+def sysexec_chroot( path, cmd, log=None, shell=False):
+ """
+ same as sysexec, but inside a chroot
+ """
+ preload = ""
+ release = os.uname()[2]
+ # 2.6.12 kernels need this
+ if release[:5] == "2.6.1":
+ library = "%s/lib/libc-opendir-hack.so" % path
+ if not os.path.exists(library):
+ shutil.copy("./libc-opendir-hack.so", library)
+ preload = "/bin/env LD_PRELOAD=/lib/libc-opendir-hack.so"
+ sysexec("chroot %s %s %s" % (path, preload, cmd), log, shell=shell)
+
+
+def sysexec_chroot_noerr( path, cmd, log=None, shell=False ):
+ """
+ same as sysexec_chroot, but capture boot manager exceptions
+ """
+ try:
+ rc= 0
+ rc= sysexec_chroot( cmd, log, shell=shell )
+ except BootManagerException, e:
+ pass
+
+ return rc
+
+
+def sysexec_noerr( cmd, log=None, shell=False ):
+ """
+ same as sysexec, but capture boot manager exceptions
+ """
+ try:
+ rc= 0
+ rc= sysexec( cmd, log, shell=shell )
+ except BootManagerException, e:
+ pass
+
+ return rc
+
+
+
+def chdir( dir ):
+ """
+ change to a directory, return 1 if successful, a BootManagerException if failure
+ """
+ try:
+ os.chdir( dir )
+ except OSError:
+ raise BootManagerException, "Unable to change to directory: %s" % dir
+
+ return 1
+
+
+
+def removefile( filepath ):
+ """
+ removes a file, return 1 if successful, 0 if failure
+ """
+ try:
+ os.remove( filepath )
+ except OSError:
+ raise BootManagerException, "Unable to remove file: %s" % filepath
+
+ return 1
+
+
+
+# from: http://forums.devshed.com/archive/t-51149/
+# Ethernet-card-address-Through-Python-or-C
+
+def hexy(n):
+ return "%02x" % (ord(n))
+
+def get_mac_from_interface(ifname):
+ """
+ given a device name, like eth0, return its mac_address.
+ return None if the device doesn't exist.
+ """
+
+ SIOCGIFHWADDR = 0x8927 # magic number
+
+ s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
+ ifname = string.strip(ifname)
+ ifr = ifname + '\0'*(32-len(ifname))
+
+ try:
+ r= fcntl.ioctl(s.fileno(),SIOCGIFHWADDR,ifr)
+ addr = map(hexy,r[18:24])
+ ret = (':'.join(map(str, addr)))
+ except IOError, e:
+ ret = None
+
+ return ret
+
+def check_file_hash(filename, hash_filename):
+ """Check the file's integrity with a given hash."""
+ return sha1_file(filename) == open(hash_filename).read().split()[0].strip()
+
+def sha1_file(filename):
+ """Calculate sha1 hash of file."""
+ try:
+ try:
+ import hashlib
+ m = hashlib.sha1()
+ except:
+ import sha
+ m=sha.new()
+ f = file(filename, 'rb')
+ while True:
+ # 256 KB seems ideal for speed/memory tradeoff
+ # It wont get much faster with bigger blocks, but
+ # heap peak grows
+ block = f.read(256 * 1024)
+ if len(block) == 0:
+ # end of file
+ break
+ m.update(block)
+ # Simple trick to keep total heap even lower
+ # Delete the previous block, so while next one is read
+ # we wont have two allocated blocks with same size
+ del block
+ return m.hexdigest()
+ except IOError:
+ raise BootManagerException, "Cannot calculate SHA1 hash of %s" % filename
git://git.onelab.eu / bootmanager.git / blobdiff