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 strdup()                Duplicate String

 #include   <string.h>

 char       *strdup(string);
 const char *string;                     Source string

    strdup() makes a copy of 'string'.  It allocates space for the string
    with a call to malloc().

    Returns:    A pointer to the storage location containing the
                duplicate string. NULL is returned if space could not be
                allocated.

      Notes:    strdup() expects to operate on null-terminated strings.
                There is no overflow checking when strings are copied or
                appended.

 Portability:   strdup() is a Microsoft extension to the ANSI standard;
                it should not ber used when ANSI compatibility is
                required.

   -------------------------------- Example ---------------------------------

    This example makes a copy of 'jelly beans' and prints it out.

           #include <string.h>
           #include <stdio.h>      /* for printf */

           char string[20] = "jelly beans";
           char *rslt;

           main()
           {
                if ((rslt = strdup(string)) == NULL)
                     printf("memory could not be allocated");
                else
                      printf("%s",rslt);
           }