Note that there is actually TWO different types of content for IO that differ only slightly in internal storage, but a lot in behavior. There are open files (including sockets and scalar-IO) and open directories. The difference is invisible from the outside:

$ perl -MDP -we'open DH,$0;DDump*DH'
SV = PVGV(0x11d7dc0) at 0x76a5e0
  REFCNT = 3
  FLAGS = (MULTI)
  NAME = "DH"
  NAMELEN = 2
  GvSTASH = 0x74af48    "main"
  GP = 0x771bc0
    SV = 0x0
    REFCNT = 1
    IO = 0x76a5f8
    FORM = 0x0
    AV = 0x0
    HV = 0x0
    CV = 0x0
    CVGEN = 0x0
    LINE = 1
    FILE = "-e"
    FLAGS = 0x2
    EGV = 0x76a5e0      "DH"
$ perl -MDP -we'opendir DH,".";DDump*DH'
SV = PVGV(0x11d7e00) at 0x76a5f0
  REFCNT = 3
  FLAGS = (MULTI)
  NAME = "DH"
  NAMELEN = 2
  GvSTASH = 0x74af48    "main"
  GP = 0x771b30
    SV = 0x0
    REFCNT = 1
    IO = 0x76a620
    FORM = 0x0
    AV = 0x0
    HV = 0x0
    CV = 0x0
    CVGEN = 0x0
    LINE = 1
    FILE = "-e"
    FLAGS = 0x2
    EGV = 0x76a5f0      "DH"

[download]

Enjoy, Have FUN! H.Merijn

In reply to Re^2: Where to find info on low level perl internals names? by Tux
in thread Where to find info on low level perl internals names? by Anonymous Monk

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