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
# default for when prompt is turned off, or it's on but the timeout triggers
BREAKPOINT_MODE=False
-VERBOSE_MODE=False
+
+# verbose mode is just fine
VERBOSE_MODE=True
# in seconds : if no input, proceed
PROMPT_TIMEOUT=5
return 1
-
-def sysexec( cmd, log= None, fsck = False ):
+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)
-
try:
- if cmd.__contains__(">"):
+ # 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 " \
except KeyboardInterrupt:
raise BootManagerException, "Interrupted by user"
+ # log stdout & stderr
if log is not None:
- if stdoutdata is not None:
- log.write(stdoutdata)
+ if stdoutdata:
+ log.write("==========stdout\n"+stdoutdata)
+ if stderrdata:
+ log.write("==========stderr\n"+stderrdata)
returncode = prog.wait()
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
"""
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 %s %s %s" % (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 )
+ rc= sysexec_chroot( cmd, log, shell=shell )
except BootManagerException, 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 )
+ rc= sysexec( cmd, log, shell=shell )
except BootManagerException, e:
pass