#!/usr/bin/python
-
+#
# Copyright (c) 2003 Intel Corporation
# All rights reserved.
#
# All rights reserved.
# expected /proc/partitions format
+from __future__ import print_function
+
import os, sys, shutil
-import popen2
+import subprocess
+import shlex
import socket
import fcntl
import string
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 debug settings
-# NOTE. when BREAKPOINT_MODE turns out enabled,
-# you have to attend the boot phase, that would hang otherwise
+### 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
+PROMPT_MODE = False
# default for when prompt is turned off, or it's on but the timeout triggers
-BREAKPOINT_MODE=False
-VERBOSE_MODE=False
-VERBOSE_MODE=True
+BREAKPOINT_MODE = False
+
+# verbose mode is just fine
+VERBOSE_MODE = True
# in seconds : if no input, proceed
-PROMPT_TIMEOUT=5
+PROMPT_TIMEOUT = 5
-def prompt_for_breakpoint_mode ():
+def prompt_for_breakpoint_mode():
global BREAKPOINT_MODE
if PROMPT_MODE:
- default_answer=BREAKPOINT_MODE
- answer=''
+ default_answer = BREAKPOINT_MODE
+ answer = ''
if BREAKPOINT_MODE:
- display="[y]/n"
+ display = "[y]/n"
else:
- display="y/[n]"
- sys.stdout.write ("Want to run in breakpoint mode ? %s "%display)
+ display = "y/[n]"
+ sys.stdout.write ("Want to run in breakpoint mode ? {} ".format(display))
sys.stdout.flush()
- r,w,e = select.select ([sys.stdin],[],[],PROMPT_TIMEOUT)
+ 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)
+ sys.stdout.write("\nTimed-out ({}s)".format(PROMPT_TIMEOUT))
if answer:
- BREAKPOINT_MODE = ( answer == "y" or answer == "Y")
+ BREAKPOINT_MODE = (answer == "y" or answer == "Y")
else:
BREAKPOINT_MODE = default_answer
- label="Off"
+ label = "Off"
if BREAKPOINT_MODE:
- label="On"
- sys.stdout.write("\nCurrent BREAKPOINT_MODE is %s\n"%label)
+ label = "On"
+ sys.stdout.write("\nCurrent BREAKPOINT_MODE is {}\n".format(label))
def breakpoint (message, cmd = None):
if BREAKPOINT_MODE:
if cmd is None:
- cmd="/bin/sh"
- message=message+" -- Entering bash - type ^D to proceed"
+ cmd = "/bin/sh"
+ message = message + " -- Entering bash - type ^D to proceed"
- print message
+ print(message)
os.system(cmd)
+ else:
+ print("Ignoring breakpoint (BREAKPOINT_MODE=False) : {}".format(message))
+
########################################
-def makedirs( path ):
+def makedirs(path):
"""
from python docs for os.makedirs:
Throws an error exception if the leaf directory
otherwise. Does not test the writability of said directory.
"""
try:
- os.makedirs( path )
+ os.makedirs(path)
except OSError:
pass
try:
- os.listdir( path )
+ os.listdir(path)
except OSError:
- raise BootManagerException, "Unable to create directory tree: %s" % path
+ raise BootManagerException("Unable to create directory tree: {}".format(path))
return 1
-def removedir( path ):
+def removedir(path):
"""
remove a directory tree, return 1 if successful, a BootManagerException
if failure.
"""
try:
- os.listdir( path )
+ os.listdir(path)
except OSError:
return 1
try:
- shutil.rmtree( path )
- except OSError, desc:
- raise BootManagerException, "Unable to remove directory tree: %s" % path
+ shutil.rmtree(path)
+ except OSError as desc:
+ raise BootManagerException("Unable to remove directory tree: {}".format(path))
return 1
-
-def sysexec( cmd, log= None ):
+def sysexec(cmd, log=None, fsck=False, shell=False):
"""
execute a system command, output the results to the logger
if log <> None
0 if failed. A BootManagerException is raised if the command
was unable to execute or was interrupted by the user with Ctrl+C
"""
- if VERBOSE_MODE:
- print ("sysexec >>> %s" % cmd)
- prog= popen2.Popen4( cmd, 0 )
- if prog is None:
- raise BootManagerException, \
- "Unable to create instance of popen2.Popen4 " \
- "for command: %s" % cmd
+ 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) >>> {}".format(cmd))
+ if VERBOSE_MODE:
+ print("sysexec (shell mode) >>> {}".format(cmd))
+ else:
+ prog = subprocess.Popen(shlex.split(cmd), stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+ if log is not None:
+ log.write("sysexec >>> {}\n".format(cmd))
+ if VERBOSE_MODE:
+ print("sysexec >>> {}".format(cmd))
+ except OSError:
+ raise BootManagerException(
+ "Unable to create instance of subprocess.Popen "
+ "for command: {}".format(cmd))
+ try:
+ (stdoutdata, stderrdata) = prog.communicate()
+ except KeyboardInterrupt:
+ raise BootManagerException("Interrupted by user")
+ # log stdout & stderr
if log is not None:
- try:
- for line in prog.fromchild:
- log.write( line )
- except KeyboardInterrupt:
- raise BootManagerException, "Interrupted by user"
-
- returncode= prog.wait()
- if returncode != 0:
- raise BootManagerException, "Running %s failed (rc=%d)" % (cmd,returncode)
-
- prog= 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 {} failed (rc={})".format(cmd, returncode))
+ else:
+ if returncode != 0:
+ raise BootManagerException("Running {} failed (rc={})".format(cmd, returncode))
+
+ prog = None
return 1
-def sysexec_chroot( path, cmd, log= None ):
+def sysexec_chroot(path, cmd, log=None, shell=False):
"""
same as sysexec, but inside a chroot
"""
release = os.uname()[2]
# 2.6.12 kernels need this
if release[:5] == "2.6.1":
- library = "%s/lib/libc-opendir-hack.so" % path
+ library = "{}/lib/libc-opendir-hack.so".format(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)
+ sysexec("chroot {} {} {}".format(path, preload, cmd), log, shell=shell)
-def sysexec_chroot_noerr( path, cmd, log= None ):
+def sysexec_chroot_noerr(path, cmd, log=None, shell=False):
"""
same as sysexec_chroot, but capture boot manager exceptions
"""
try:
- rc= 0
- rc= syexec_chroot( cmd, log )
- except BootManagerException, e:
+ rc = 0
+ rc = sysexec_chroot(cmd, log, shell=shell)
+ except BootManagerException as e:
pass
return rc
-def sysexec_noerr( cmd, log= None ):
+def sysexec_noerr(cmd, log=None, shell=False):
"""
same as sysexec, but capture boot manager exceptions
"""
try:
- rc= 0
- rc= sysexec( cmd, log )
- except BootManagerException, e:
+ rc = 0
+ rc = sysexec(cmd, log, shell=shell)
+ except BootManagerException as e:
pass
return rc
-def chdir( dir ):
+def chdir(dir):
"""
change to a directory, return 1 if successful, a BootManagerException if failure
"""
try:
- os.chdir( dir )
+ os.chdir(dir)
except OSError:
- raise BootManagerException, "Unable to change to directory: %s" % dir
+ raise BootManagerException("Unable to change to directory: {}".format(dir))
return 1
-def removefile( filepath ):
+def removefile(filepath):
"""
removes a file, return 1 if successful, 0 if failure
"""
try:
- os.remove( filepath )
+ os.remove(filepath)
except OSError:
- raise BootManagerException, "Unable to remove file: %s" % filepath
+ raise BootManagerException("Unable to remove file: {}".format(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.
SIOCGIFHWADDR = 0x8927 # magic number
- s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
+ 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:
+ r = fcntl.ioctl(s.fileno(), SIOCGIFHWADDR,ifr)
+ ret = ':'.join(["{:02x}".format(ord(n)) for n in r[18:24]])
+ except IOError as 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 {}".format(filename))
git://git.onelab.eu / bootmanager.git / blobdiff