2000-11-07 Gary Houston <ghouston@arglist.com>

2000-11-07  Gary Houston  <ghouston@arglist.com>

	* ports.c (scm_port_for_each): new proc.  implements port-for-each,
	which applies a procedure to each port in the port table.
	ports.h: declare scm_port_for_each.

	* ioext.c (scm_dup2): new proc.  implements "dup2" which is a simple
	wrapper for the dup2 system call (unlike dup->fdes or
	primitive-move->fdes).
	* ioext.h: declare scm_dup2.

	* filesys.c (scm_close_fdes): new proc.  implements "close-fdes"
	which is a simple wrapper for close system call (unlike scm_close).
	* filesys.h: declare for scm_close_fdes.