FreeTDS Development Group

["Varley, David(CBorn at Alcoa)" <David.Varley AT alcoa.com.au>]

Thats why I reopened this thread addressed to Nick, as he was
doing testing on DU4.0 (aka Tru64) and looking at threadsafe
code, I believe.

I've attached the man page, gethostbyaddr_r was not recommended for
new code at that stage!

OS version is 4.0f, was OSF1, then DU, then Tru64, and now HP something,
soon to be assimilated (ie dropped in favour of HPUX :( ).

If noone has this working, I can live without it, I'm afraid that with
the dropping of Tru64 by HP, any corporate support here is evaporating.
At a meeting yesterday I was basically told all the alpha systems will
be replaced by Win2K servers at the next upgrade. Before I get to deploy
FreeTDS in the field. I'm still happy to test on it, though.

David

> -----Original Message-----
> From: ZIGLIO Frediano [mailto:Frediano.Ziglio AT vodafoneomnitel.it]
> Sent: Thursday, 12 September 2002 7:25 PM
> To: TDS Development Group
> Subject: [freetds] RE: configure bombs on DU 4.0
> 
> 
> > > 
> > > Freddy,
> > > 
> > > Tests 1-6 core-dump, 7 and 8 both pass.
> > > No freetds.log is generated, but here's a run of t0001 with
> > > resulting core-dump, foloowed by stack traces using first gdb
> > > and then dbx (which seems to grok the libc symbols better).
> > > 
> > > Parameters to gethostbyaddr_r look a bit odd, right number,
> > > but strange values. If tds_gethostbyaddr_r is passing a
> > > structure address as the last parameter, how can it be 0 ?
> > > 
> > 
> > Well... a "man gethostbyaddr_r" should be useful.
> > 
> > freddy77
> > 
> I found it.
> What version of Tru64 are you using ??
> Version 5 (I don't know earlier) have reentrant gethostbyaddr 
> function.
> I think we should change our reentrant implementation for tru64.
> There is a define for tru64 system ?
> Something like
> 
> #ifdef __TRU64__
> /* Oh.. tru64 system found */
> #endif
> ??
> 
> And to know version ??
> 
> freddy77
> 
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gethostbyaddr(3)                                             gethostbyaddr(3)



NAME

  ggeetthhoossttbbyyaaddddrr, 
ggeetthhoossttbbyyaaddddrr__rr - Gets a network host entry by 
address

LIBRARY

  Standard C Library (lliibbcc..ssoo,, lliibbcc..aa)

SYNOPSIS

  ##iinncclluuddee <<nneettddbb..hh>>

  ssttrruucctt hhoosstteenntt 
**ggeetthhoossttbbyyaaddddrr((
          ccoonnsstt       vvooiidd *_a_d_d_r,,
          ssiizzee__tt _l_e_n,,
          iinntt _t_y_p_e)) ;;

  [DIGITAL]  The following obsolete function is supported in order to main-
  tain backward compatibility with previous versions of the operating system.
  You should not use it in new designs.

  iinntt **ggeetthhoossttbbyyaaddddrr__rr((
          ccoonnsstt       cchhaarr *_a_d_d_r,,
          iinntt _l_e_n,,
          iinntt _t_y_p_e,,
          ssttrruucctt hhoosstteenntt **_h_p_t_r,,
          ssttrruucctt hhoosstteenntt__ddaattaa 
**_h_d_p_t_r));;

  [DIGITAL]  The following definition of the 
ggeetthhoossttbbyyaaddddrr(()) function  does
  not conform to current standards and is supported only for backward compa-
  tibility (see ssttaannddaarrddss(5)):

  ssttrruucctt hhoosstteenntt 
**ggeetthhoossttbbyyaaddddrr((
          ccoonnsstt       cchhaarr *_a_d_d_r,,
          iinntt _l_e_n,,
          iinntt _t_y_p_e)) ;;

STANDARDS

  Interfaces documented on this reference page conform to industry standards
  as follows:

  ggeetthhoossttbbyyaaddddrr(()):  XNS4.0

  Refer to the ssttaannddaarrddss(5) reference page for more 
information       about indus-
  try standards and associated tags.

PARAMETERS

  _a_d_d_r      Specifies an Internet address in network order.

  _l_e_n         Specifies the number of bytes in an Internet address.

  _t_y_p_e      Specifies the Internet domain address format. The value 
AAFF__IINNEETT
            must be used.

  _h_d_p_t_r           [DIGITAL]  Is data for the host database.  The 
nneettddbb..hh header
            file defines the hhoosstteenntt__ddaattaa structure.

  _h_p_t_r      [DIGITAL]  Points to the hhoosstteenntt structure. 
   The nneettddbb..hh header
            file defines the hhoosstteenntt structure.

DESCRIPTION

  The ggeetthhoossttbbyynnaammee(()) function returns a 
pointer to a structure   of type hhooss--
  tteenntt.  Its members specify data obtained from either the local 
//eettcc//hhoossttss
  file or one of the files distributed by BIND or NIS.  To determine which
  file or files to search, and in which order, the system uses the switches
  in the //eettcc//ssvvcc..ccoonnff file. The 
nneettddbb..hh header file defines the hhoosstteenntt
  structure.

  The ggeetthhoossttbbyyaaddddrr(()) function searches   the 
network host database sequen-
  tially until a match with the _a_d_d_r and _t_y_p_e parameters 
occurs. The _l_e_n
  parameter must specify the number of bytes in an Internet address. The
  _a_d_d_r_e_s_s parameter must specify the address in   network 
order. The _t_y_p_e
  parameter must be the constant AAFF__IINNEETT, which   specifies the 
Internet
  address format. When EEOOFF (End-of-File) is reached without a match, an 
  error
  value is returned.

  If using BIND, the information is obtained from a name server specified in
  the //eettcc//rreessoollvv..ccoonnff file.  When the name 
server is not running, the
  ggeetthhoossttbbyyaaddddrr(()) function searches the   local 
hhoossttss name file.

  Use the eennddhhoosstteenntt(()) function to close the 
//eettcc//hhoossttss     file.

NOTES

  The ggeetthhoossttbbyyaaddddrr(()) function returns a 
pointer to thread-specific data.
  Subsequent calls to this or a related function from the same thread
  overwrite this data.

  [DIGITAL]  The ggeetthhoossttbbyyaaddddrr__rr(()) function 
is an obsolete reentrant version
  of the ggeetthhoossttbbyyaaddddrr(()) function.  It is 
supported in order to   maintain
  backward compatibility with previous versions of the operating system and
  should not be used in new designs.  Note that you must zero-fill the 
_h_d_p_t_r
  structure before its first access by the 
ggeetthhoossttbbyyaaddddrr__rr(()) function.

RETURN VALUES

  Upon successful completion, the 
ggeetthhoossttbbyyaaddddrr(()) function returns a pointer
  to a hhoosstteenntt structure.  If it reaches the end of the   
network hostname
  database, it returns a null pointer.

  [DIGITAL]  Upon successful completion, the 
ggeetthhoossttbbyyaaddddrr__rr(()) function
  stores the hhoosstteenntt structure in _h_p_t_r,   and returns a 
value of 0 (zero).
  Upon failure, it returns a value of -1.

ERRORS

  If the ggeetthhoossttbbyyaaddddrr(()) or 
ggeetthhoossttbbyyaaddddrr__rr(()) function call fails, 
hh__eerrrrnnoo is
  set to one of the following values:

  [[HHOOSSTT__NNOOTT__FFOOUUNNDD]]
            Host is unknown.

  [[NNOO__DDAATTAA]] The       server recognized the request and the 
name, but no address is
            available for the name.  Another type of name server request may
            be successful.

  [[NNOO__RREECCOOVVEERRYY]]
            An unexpected server failure occurred.  This is a nonrecoverable
            error.

  [[TTRRYY__AAGGAAIINN]]
            A transient error occurred, for example, the server did not
            respond.  A retry at some later time may be successful.

  [DIGITAL]  If any of the following conditions occurs, the 
ggeetthhoossttbbyyaaddddrr__rr(())
  function sets eerrrrnnoo to the corresponding value:

  [[EEIINNVVAALL]]  The _n_a_m_e, _h_p_t_r, or 
_h_d_p_t_r is       invalid, or _t_y_p_e is not 
AAFF__IINNEETT.

FILES

  //eettcc//hhoossttss
            This file is the DARPA Internet network hostname database. Each
            record in the file occupies a single line and has three fields
            consisting of the host address, official hostname, and aliases.

  //eettcc//rreessoollvv..ccoonnff
            The resolver configuration file.

  //eettcc//ssvvcc..ccoonnff
            The database service selection configuration file.

RELATED INFORMATION

  Functions: eennddhhoosstteenntt(3), 
ggeetthhoossttbbyynnaammee(3), sseetthhoosstteenntt(3).

  Files: hhoossttss(4), rreessoollvv..ccoonnff(4), 
ssvvcc..ccoonnff(4).

  Networks: bbiinndd__iinnttrroo(7), nniiss__iinnttrroo(7).

  Standards: ssttaannddaarrddss(5)