[clisp-list] Re: Patch for POSIX:OPENLOG

[Pascal J.B. <pj...@in...>]

Sam Steingold writes:
> do you know what happens when ident==NULL is passed to openlog?

The standard doesn't evision such an occurence:
http://www.opengroup.org/onlinepubs/007908799/xsh/openlog.html
"The ident argument is a string that is prepended to every message."

But  glibc openlog man page indicates that:

  The use  of openlog() is optional; it will automatically be called
  by syslog() if necessary, in which case ident will default to NULL.

and notes:

       The parameter ident in the call of openlog() is  probably  stored
       as-is.  Thus, if the string it points to is changed, syslog() may
       start prepending the changed string, and if the string it  points
       to  ceases to exist, the results are undefined.  Most portable is
       to use a string constant.


So we can guess that passing NULL as ident to openlog would work with
glibc, but this is not prudent to pass NULL to openlog.  If the user
wants the default ident, he should not call openlog.


-- 
__Pascal Bourguignon__                     http://www.informatimago.com/

The world will now reboot.  don't bother saving your artefacts.