Wireshark · Ethereal-dev: Re: [Ethereal-dev] missing plugin

[Ruud Linders <ruud@xxxxxxxxxx>]

Frank,

This is exactly why I sent this patch to the list in the hope it would be 
included in the source:

--- plugins.c.ORIG      Sat Feb 23 20:12:26 2002
+++ plugins.c   Thu Apr 18 11:18:57 2002
@@ -196,7 +196,12 @@

            snprintf(filename, FILENAME_LEN, "%s" G_DIR_SEPARATOR_S "%s",
                dirname, file->d_name);
-           if ((handle = g_module_open(filename, 0)) == NULL) continue;
+           if ((handle = g_module_open(filename, 0)) == NULL)
+             {
+               g_warning("loading module <%s> failed \n( %s )\n",
+                         filename, g_module_error() );
+               continue;
+             }
            name = (gchar *)file->d_name;
            if (g_module_symbol(handle, "version", (gpointer*)&version) == FALSE)
            {


WITH this patch, it will tell you WHY the plugin could not be loaded.

_
Ruud

Frank Singleton wrote:
> Bernd Becker wrote:
>
> > Hi Frank,
> >
> > you have probably checked the usual things like access permissions on the
> > directories and shared library files. Even so, have you tried to use strace
> > (on linux) or truss (Solaris) to see what ethereal is doing?
> > E.g. "strace -o /tmp/ethereal.out ethereal" and then grep for
> > plugins in the output file. It will show you which directories is searching
> > for plugins and if opening and reading a plugin shared lib worked ok.
> >
> > Something like this (on linux):
> >
> > open("/usr/lib/ethereal/plugins/0.9.3",
> > O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = -1 ENOENT (No such file or
> > directory)
> > open("/usr/local/lib/ethereal/plugins/0.9.3",
> > O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = 4
> > open("/usr/local/lib/ethereal/plugins/0.9.3/cosnaming.so", O_RDONLY) = 5
> > open("/usr/local/lib/ethereal/plugins/0.9.3/coseventcomm.so", O_RDONLY) = 5
> > open("/usr/local/lib/ethereal/plugins/0.9.3/gryphon.so", O_RDONLY) = 5
> > open("/usr/local/lib/ethereal/plugins/0.9.3/mgcp.so", O_RDONLY) = 5
> > open("/home/bernd/.ethereal/plugins",
> > O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = -1 ENOENT (No such file or
> > directory)
> >
> > It might be something trivial, like an older ethereal binary being called
> > that is
> > getting the plugins you are seeing from another directory, or wrong access
> > permissions ...
> >
> > If strace or truss don't show anything, it might be the dlopen failing for
> > some
> > other reason. I am not sure if it will show a warning or error message. What
> > platform are you on?
>
>
>
> Hi,
>
> I am using Linux ..
>
> Yep, it present (osimgmt.so)
> but not in tools/plugins ??
>
> I have not seen this behaviour before when testing idl2eth 
> and making plugins.
>
> [frank@cray frank]$ grep plugins /tmp/ethereal.out        
> open("/usr/lib/ethereal/plugins/0.9.3", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = -1 ENOENT (No such file or directory)
> open("/usr/local/lib/ethereal/plugins/0.9.3", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = 3
> open("/usr/local/lib/ethereal/plugins/0.9.3/gryphon.so", O_RDONLY) = 4
> open("/usr/local/lib/ethereal/plugins/0.9.3/cosnaming.so", O_RDONLY) = 4
> open("/usr/local/lib/ethereal/plugins/0.9.3/coseventcomm.so", O_RDONLY) = 4
> open("/usr/local/lib/ethereal/plugins/0.9.3/osimgmt.so", O_RDONLY) = 4
> open("/home/frank/.ethereal/plugins", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = -1 ENOENT (No such file or directory)
> [frank@cray frank]$ 
>
> [frank@cray frank]$ ll /usr/local/lib/ethereal/plugins/0.9.3/
> total 1548
> -rw-r--r--    1 root     root        61534 May  6 13:56 coseventcomm.a
> -rwxr-xr-x    1 root     root          719 May  6 13:56 coseventcomm.la
> -rwxr-xr-x    1 root     root        61528 May  6 13:56 coseventcomm.so
> -rw-r--r--    1 root     root        77792 May  6 13:56 cosnaming.a
> -rwxr-xr-x    1 root     root          698 May  6 13:56 cosnaming.la
> -rwxr-xr-x    1 root     root        73748 May  6 13:56 cosnaming.so
> -rw-r--r--    1 root     root       122842 May  6 13:56 gryphon.a
> -rwxr-xr-x    1 root     root          684 May  6 13:56 gryphon.la
> -rwxr-xr-x    1 root     root       117868 May  6 13:56 gryphon.so
> -rw-r--r--    1 root     root       555922 May  6 13:56 osimgmt.a
> -rwxr-xr-x    1 root     root          684 May  6 13:56 osimgmt.la
> -rwxr-xr-x    1 root     root       448058 May  6 13:56 osimgmt.so
>
> I removed mgcp.* to see if it would no longer be present in the
> tools/plugins menu, and that was the case.
>
> Any clues on where to look ??
>
> Cheers / Frank
>
> --
>
> EUS/WV/Z Frank Singleton      ASO Americas BSS
> Office : +1 972 583 3251      ECN 800 33251  
> Mobile : +1 214 228 0874      Amateur Radio: VK3FCS/KM5WS   
> Email : frank.singleton@xxxxxxxxxxxx
>
> Hardware: HP Omnibook 4150 running Redhat Linux 7.1 (2.4.3-12 kernel).
>
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