I don't think this is guaranteed to work. See top answer here [1]
(which cites the standard). Also, note that the man page for exec and
friends notes that the first argument *by convention* is the name of
the executable.
I'm not against exposing a function to return argv[0] (I thought
getProgName did that), but the documentation should make clear that it
is not guaranteed to work.
[1]: http://stackoverflow.com/questions/2050961/is-argv0-name-of-executable-an-ac...
On 13 June 2012 00:57, Johan Tibell
Hi,
getProgName is only useful in case you want to print the program name to the screen. You cannot actually use it to do anything interesting programmatically (like execv:ing the program.) I suggest we add getFullProgName which does the sensible thing of returning argv[0]. Here's an implementation:
getFullProgName :: IO String getFullProgName = alloca $ \ p_argc -> alloca $ \ p_argv -> do getFullProgArgv p_argc p_argv peek p_argv >>= peek >>= peekCString
foreign import ccall unsafe "getFullProgArgv" getFullProgArgv :: Ptr CInt -> Ptr (Ptr CString) -> IO ()
Discussion deadline: 2 weeks
-- Johan
_______________________________________________ Libraries mailing list Libraries@haskell.org http://www.haskell.org/mailman/listinfo/libraries
-- Push the envelope. Watch it bend.