Re: [Caml-list] toplevel with pre-installed printers

[David Brown <caml-list2@davidb.org>]

On Fri, Jan 20, 2006 at 01:24:03PM +1100, skaller wrote:

> You simply look at argv[0] which on some Unix systems
> is the full path name of the invoked executable.

Actually, argv[0] is almost never a full path.  It is the path used to
invoke the executable.  So, if the program is in the user's path, then it
will just be the filename, with no path information.

In order to find itself, a program has to search for argv[0] in $PATH.

If you don't believe me, try it:

hello.c:
   #include <stdio.h>
   
   int
   main (int argc, char **argv)
   {
     printf ("Program name: %s\n", argv[0]);
   }

% gcc -o ~/bin/hello hello.c
% hello
Program name: hello

Dave