/*
  How to unbuffer the output of a command?

  Some UNIX commands which use the stdio library are fully buffered (versus 
  line buffered) when they write to a file which is not a tty. 
  This can be a problem when you run
		    command > log 2>&1
  and the command hangs and is killed, because not all the output will be in
  the log.  The log would be useful for debugging purposes.

  Here is a trick from:   Casper Dik <casper@holland.sun.com>

  Compile this C program with: 
    cc -G isatty_preload.c -o isatty_preload.so -Kpic 

  Then use with
  
  env LD_PRELOAD=/path/to/isatty_preload.so  command > log 2>&1

*/

_isatty(int fd) { return 1;}