Re: Pcap debug at runtime

[Denis Ovsienko <denis () ovsienko info>]

On Tue, 14 Mar 2023 08:33:40 +0100
Francois-Xavier Le Bail <devel.fx.lebail () orange fr> wrote:

> After an update based on a Denis's idea, the configuration use now an
> environment variable instead of configurations files. 
> If the environment variable INSTRUMENT is
> - unset or set to an empty string, print nothing, like with no
> instrumentation
> - set to "all" or "a", print all the functions names
> - set to "global" or "g", print only the global functions names
>     
> Note that before the change, the default was to print all functions.
> Now it is to print nothing.

For posterity, this is where the idea originates:

$ LD_DEBUG=help date
Valid options for the LD_DEBUG environment variable are:

  libs        display library search paths
  reloc       display relocation processing
  files       display progress for input file
  symbols     display symbol table processing
  bindings    display information about symbol binding
  versions    display version dependencies
  scopes      display scope information
  all         all previous options combined
  statistics  display relocation statistics
  unused      determined unused DSOs
  help        display this help message and exit

To direct the debugging output into a file instead of standard output
a filename can be specified using the LD_DEBUG_OUTPUT environment
variable.

-- 
    Denis Ovsienko
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