/* gethostname emulation for SysV and POSIX.1.
- Copyright (C) 1992, 2003, 2006, 2008, 2009 Free Software Foundation, Inc.
+ 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
#include <config.h>
#if !((defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__)
+/* Unix API. */
/* Specification. */
#include <unistd.h>
}
strncpy (name, uts.nodename, len);
#else
- strcpy (name, ""); /* Hardcode your system name if you want. */
+ strcpy (name, ""); /* Hardcode your system name if you want. */
#endif
return 0;
}
#else
+/* Native Windows API. Which primitive to choose?
+ - gethostname() requires linking with -lws2_32.
+ - GetComputerName() does not return the right kind of hostname.
+ - GetComputerNameEx(ComputerNameDnsHostname,...) returns the right hostname,
+ but it is hard to use portably:
+ - It requires defining _WIN32_WINNT to at least 0x0500.
+ - With mingw, it also requires
+ "#define GetComputerNameEx GetComputerNameExA".
+ - With older versions of mingw, none of the declarations are present at
+ 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 namelen)
+rpl_gethostname (char *name, size_t len)
{
- int r = gethostname (name, (int) namelen);
+ 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 ();