# [OmniOS-discuss] LX Zone DTrace

Mini Trader miniflowtrader at gmail.com
Fri Jan 13 21:06:28 UTC 2017

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    Here is the code.  It will run just fine with Debian 8.6 or OmniOS.  It
    will fail on the LX zone with Debian.  The only way for it to fail is for
    the stat call to fail and this seems to happen because the system doen't
    know what directory it is in.  The files being looked at are static so not
    a race condition.

    Simple python script.

    # read a directory, stat all files

    import os
    import sys
    from stat import *

    def walk(d):
        os.chdir(d)
        working = os.getcwd()
        print working
        dirlist = os.listdir('.')
        dirlist.sort()
        for f in dirlist:
            try:
                s = os.lstat(f)
                if S_ISDIR(s.st_mode):
                    walk(f)
            except OSError, err:
                print "CurrentDIR: " + working
                print "CurrentFile: " + f
                print err
        os.chdir('..')
        print "DONE"

    if len(sys.argv) != 2:
        print 'need 1 arg, directory to scan'

    cwd = os.getcwd()
    os.chdir(sys.argv[1])
    walk('.')

    On Fri, Jan 13, 2017 at 3:52 PM, Dale Ghent <daleg at omniti.com> wrote:

    > Could you provide some of your telemetry and background here? There might
    > be a reasonable explanation, or a quick fix.
    >
    > /dale
    >
    > > On Jan 13, 2017, at 3:12 PM, Mini Trader <miniflowtrader at gmail.com>
    > wrote:
    > >
    > > I have a small program that will reproduce the issue.  Where should the
    > bug be sent?  It's pretty serious.  The system is forgetting the location
    > of the current working directory in a recursive call.
    > >
    > > On Fri, Jan 13, 2017 at 9:30 AM, Nahum Shalman <nshalman at omniti.com>
    > wrote:
    > > Have you tried simply tracing the lx-syscall probes?
    > >
    > > On Fri, Jan 13, 2017 at 9:24 AM, Mini Trader <miniflowtrader at gmail.com>
    > wrote:
    > > I followed these instructions prior to my post and my zone would not
    > boot after doing the mod to add the flag to the file.
    > >
    > >
    > > On Fri, Jan 13, 2017 at 8:55 AM Nahum Shalman <nshalman at omniti.com>
    > wrote:
    > > The short answer is yes.
    > >
    > > My experience debugging LX was on SmartOS and there are some notes on
    > https://wiki.smartos.org/display/DOC/LX+Branded+Zones#
    > LXBrandedZones-Debugging
    > >
    > > Some of the details on that page are Specific to SmartOS, but some of it
    > is generic to LX.
    > >
    > > -Nahum
    > >
    > > On Fri, Jan 13, 2017 at 12:46 AM, Mini Trader <miniflowtrader at gmail.com>
    > wrote:
    > > Is there anything that can be done to trace a program having issues on
    > an LX Zone.
    > >
    > > I am seeing:
    > >
    > > OSError: [Errno 2] No such file or directory:
    > >
    > > Again under certain conditions which I am trying to trace -
    > unfortunately this is a closed source program.  Can DTrace be used to help
    > track something like this?
    > >
    > > Thanks!
    > >
    > >
    > >
    > > _______________________________________________
    > >
    > >
    > > OmniOS-discuss mailing list
    > >
    > >
    > > OmniOS-discuss at lists.omniti.com
    > >
    > >
    > > http://lists.omniti.com/mailman/listinfo/omnios-discuss
    > >
    > >
    > >
    > >
    > >
    > >
    > >
    > >
    > > _______________________________________________
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    > > OmniOS-discuss at lists.omniti.com
    > > http://lists.omniti.com/mailman/listinfo/omnios-discuss
    >
    >
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