execle functions can be thought of as arg0, arg1, ..., argn. Together
they describe a list of one or more pointers to null-terminated strings
that represent the argument list available to the executed program.
The first argument, by convention, should point to the file name asso-
ciated with the file being executed. The list of arguments must be
terminated by a NULL pointer, and, since these are variadic functions,
this pointer must be cast (char *) NULL.
SVN revision: 14411
886713a310