text: #include <sys/cdefs.h>
  #if defined(LIBC_SCCS) && !defined(lint)
  static char sccsid[] = "@(#)rindex.c	5.2 (Berkeley) 3/9/86";
  #endif LIBC_SCCS and not lint
  
  #include <string.h>
  /*
   * Return the ptr in sp at which the character c last
   * appears; NULL if not found
   */
  
  char *
  rindex(sp, c)
  register char *sp, c;
  {
  	register char *r;
  
  	r = NULL;
  	do {
  		if (*sp == c)
  			r = sp;
  	} while (*sp++);
  	return(r);
  }
  