-#!/usr/bin/python2
-
+#!/usr/bin/python
+#
+# $Id$
+# $URL$
+#
# Copyright (c) 2003 Intel Corporation
# All rights reserved.
#
import fcntl
import string
import exceptions
+import hashlib
from Exceptions import *
+### 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
+
+# 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=False
+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:
0 if failed. A BootManagerException is raised if the command
was unable to execute or was interrupted by the user with Ctrl+C
"""
- if BREAKPOINT_MODE:
+ if VERBOSE_MODE:
print ("sysexec >>> %s" % cmd)
prog= popen2.Popen4( cmd, 0 )
if prog is None:
raise BootManagerException, "Interrupted by user"
returncode= prog.wait()
- if returncode != 0:
+ if returncode != 0 and returncode != 256:
raise BootManagerException, "Running %s failed (rc=%d)" % (cmd,returncode)
prog= None
return 1
+def sysexec_chroot( path, cmd, log= None ):
+ """
+ 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)
+
+
+def sysexec_chroot_noerr( path, cmd, log= None ):
+ """
+ same as sysexec_chroot, but capture boot manager exceptions
+ """
+ try:
+ rc= 0
+ rc= syexec_chroot( cmd, log )
+ except BootManagerException, e:
+ pass
+
+ return rc
+
+
def sysexec_noerr( cmd, log= None ):
"""
same as sysexec, but capture boot manager exceptions
return ret
-### 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
-
-# enabling this will cause the node to ask for breakpoint-mode at startup
-# production code should read False/False
-PROMPT_MODE=False
-# if promt mode enabled, this default is taken
-BREAKPOINT_MODE=False
-# in seconds : if no input, proceed
-PROMPT_TIMEOUT=5
+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 prompt_for_breakpoint_mode ():
-
- global BREAKPOINT_MODE
- if PROMPT_MODE:
- answer = "n"
- sys.stdout.write ("Want to run in breakpoint mode ? y/[n] ")
- sys.stdout.flush()
- r,w,e = select.select ([sys.stdin],[],[],PROMPT_TIMEOUT)
- if r:
- answer = string.strip(sys.stdin.readline())
- else:
- sys.stdout.write("Timed-out is %ds\n"%PROMPT_TIMEOUT)
- BREAKPOINT_MODE = ( answer == "y" or answer == "Y")
- label="Off"
- if BREAKPOINT_MODE:
- label="On"
- sys.stdout.write("Current 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 sha1_file(filename):
+ """Calculate sha1 hash of file."""
+ try:
+ m = hashlib.sha1()
+ 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