Description of problem:

In old logrotate 3.6 a prerotate or postrotate script called with the logfile name in the first 
argument.  Now no argument is passed to scripts.

Version-Release number of selected component (if applicable):
logrotate 3.7

The bug is in execlp(3) call.  In 3.6 there was a system(3) call, which handled everything 
well.  Now execlp() is called as execlp(filespec, logfn, NULL);, but execlp(3) man page says:

       int execlp( const char *file, const char *arg, ...);
...
       The  const  char  *arg  and subsequent ellipses in the execl, execlp, and execle 
functions can be
       thought of as arg0, arg1, ..., argn.  Together they describe a list of one or  more  
pointers  to
...
thus the first parameter (file) is filespec, arg0 is logfn (==the file is run as this name), and 
there're no arguments.  This line should be replaced by execlp(filespec, filespec, logfn, 
NULL);, or - much better - as described in bug 126259 (of course with a good arg0).