clib2 Code

- Added the base_dir_nametest test program.

- basename() and dirname() can no longer return NULL. They truncate the
resulting path name instead. This is done so because some code that
calls basename() or dirname() does not check if the function's return
value is NULL.

- Forgot to update chown() to use the same bug fix as fchown().

- The SetOwner() fall-back code for Kickstart 2.04 was passing the wrong
parameters to the file system. The first (dp_Arg1) should have been
zero. Ouch.

- Got rid of some more compiler warnings by introducing function prototypes
which were missing and by casting pointers to the expected types.

- Corrected a couple more compiler warnings caused by mutable/constant
string pointer assignments.

- Replaced "char *" pointers with "const char *" pointers.

- ttyname() now calls ttyname_r(). Also, the libunix.a version of ttyname_r()
will produce "/CONSOLE" rather than "CONSOLE:".

- asctime_r() now returns NULL if the buffer is too short to hold even a single
byte of data.

- basename() is not supposed to modify the string it is passed and should
return a pointer to a string which can be modified. Now it does. Same
thing for dirname().