+
−/* gethostname emulation for SysV and POSIX.1.
+
−
+
−   Copyright (C) 1992, 2003, 2006, 2008-2013 Free Software Foundation, Inc.
+
−
+
−   This program is free software: you can redistribute it and/or modify
+
−   it under the terms of the GNU General Public License as published by
+
−   the Free Software Foundation; either version 3 of the License, or
+
−   (at your option) any later version.
+
−
+
−   This program is distributed in the hope that it will be useful,
+
−   but WITHOUT ANY WARRANTY; without even the implied warranty of
+
−   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+
−   GNU General Public License for more details.
+
−
+
−   You should have received a copy of the GNU General Public License
+
−   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
−
+
−/* David MacKenzie <djm@gnu.ai.mit.edu>
+
−   Windows port by Simon Josefsson <simon@josefsson.org> */
+
−
+
−#include <config.h>
+
−
+
−#if !((defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__)
+
−/* Unix API.  */
+
−
+
−/* Specification.  */
+
−#include <unistd.h>
+
−
+
−#ifdef HAVE_UNAME
+
−# include <sys/utsname.h>
+
−#endif
+
−
+
−#include <string.h>
+
−
+
−/* Put up to LEN chars of the host name into NAME.
+
−   Null terminate it if the name is shorter than LEN.
+
−   Return 0 if ok, -1 if error.  */
+
−
+
−#include <stddef.h>
+
−
+
−int
+
−gethostname (char *name, size_t len)
+
−{
+
−#ifdef HAVE_UNAME
+
−  struct utsname uts;
+
−
+
−  if (uname (&uts) == -1)
+
−    return -1;
+
−  if (len > sizeof (uts.nodename))
+
−    {
+
−      /* More space than we need is available.  */
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−      name[sizeof (uts.nodename)] = '\0';
+
−      len = sizeof (uts.nodename);
+
−    }
+
−  strncpy (name, uts.nodename, len);
+
−#else
+
−  strcpy (name, "");            /* Hardcode your system name if you want.  */
+
−#endif
+
−  return 0;
+
−}
+
−
+
−#else
+
−/* Native Windows API.  Which primitive to choose?
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−   - gethostname() requires linking with -lws2_32.
+
−   - GetComputerName() does not return the right kind of hostname.
+
−   - GetComputerNameEx(ComputerNameDnsHostname,...) returns the right hostname,
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−     but it is hard to use portably:
+
−       - It requires defining _WIN32_WINNT to at least 0x0500.
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−       - With mingw, it also requires
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−         "#define GetComputerNameEx GetComputerNameExA".
+
−       - With older versions of mingw, none of the declarations are present at
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−         all, not even of the enum value ComputerNameDnsHostname.
+
−   So we use gethostname().  Linking with -lws2_32 is the least evil.  */
+
−
+
−#define WIN32_LEAN_AND_MEAN
+
−/* Get winsock2.h. */
+
−#include <unistd.h>
+
−
+
−/* Get INT_MAX.  */
+
−#include <limits.h>
+
−
+
−/* Get set_winsock_errno. */
+
−#include "w32sock.h"
+
−
+
−#include "sockets.h"
+
−
+
−#undef gethostname
+
−
+
−int
+
−rpl_gethostname (char *name, size_t len)
+
−{
+
−  int r;
+
−
+
−  if (len > INT_MAX)
+
−    len = INT_MAX;
+
−  gl_sockets_startup (SOCKETS_1_1);
+
−  r = gethostname (name, (int) len);
+
−  if (r < 0)
+
−    set_winsock_errno ();
+
−
+
−  return r;
+
−}
+
−
+
−#endif