IRIX Base Documentation 2002 November/SGI IRIX Base Documentation 2002 November.iso/usr/share/catman/p_man/cat4/fd.z/fd

Text File | 2002-10-03 | 1.9 KB | 67 lines

ffffdddd((((4444))))                                                                    ffffdddd((((4444))))



NNNNAAAAMMMMEEEE
     _////_dddd_eeee_vvvv_////_ffff_dddd - file descriptor files

DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
     These files, conventionally called _////_dddd_eeee_vvvv_////_ffff_dddd_////_0000, _////_dddd_eeee_vvvv_////_ffff_dddd_////_1111, _////_dddd_eeee_vvvv_////_ffff_dddd_////_2222, and
     so on, refer to files accessible through file descriptors.  If file
     descriptor _n is open, these two system calls have the same effect:

          _ffff_dddd _==== _oooo_pppp_eeee_nnnn_((((_""""_////_dddd_eeee_vvvv_////_ffff_dddd_////_n_""""_,,,,_mmmm_oooo_dddd_eeee_))))_;;;;
          _ffff_dddd _==== _dddd_uuuu_pppp_((((_n_))))_;;;;

     On these files _cccc_rrrr_eeee_aaaa_tttt(2) is equivalent to _oooo_pppp_eeee_nnnn, and _mmmm_oooo_dddd_eeee is ignored.  As
     with _dddd_uuuu_pppp, subsequent reads or writes on _ffff_dddd fail unless the original file
     descriptor allows the operations.

SSSSEEEEEEEE AAAALLLLSSSSOOOO
     _oooo_pppp_eeee_nnnn(2), _dddd_uuuu_pppp(2)

DDDDIIIIAAAAGGGGNNNNOOOOSSSSTTTTIIIICCCCSSSS
     _oooo_pppp_eeee_nnnn(2) returns -1 and _EEEE_BBBB_AAAA_DDDD_FFFF if the associated file descriptor is not
     open.


































                                                                        PPPPaaaaggggeeee 1111