abort

 NAME
  abort   - abort a program (exit with an error)

 SYNOPSIS
  void abort(void);

 FUNCTION
  aborts a program with a non-zero exit code.  The default abort
  routine in c.lib does the equivalent of an 'exit(20);'.

  The programmer may overide the default abort routine with his
  own.

 EXAMPLE
  #include <stdio.h>
  #include <stdlib.h>

  main(ac, av)
  int ac;
  char **av;
  {
      if (ac == 1) {
      puts("Expected an argument!");
      abort();
      }
      puts("Thanks!");
      return(0);
  }

 INPUTS
  none

 RESULTS
  abort() never returns