Implement gethostname correctly for native Windows.

[gnulib.git] / lib / gethostname.c

diff --git a/lib/gethostname.c b/lib/gethostname.c
index fe78dbb..782c402 100644 (file)
--- a/lib/gethostname.c
+++ b/lib/gethostname.c
@@ -1,10 +1,11 @@
 /* gethostname emulation for SysV and POSIX.1.
-   Copyright (C) 1992 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or modify
+   Copyright (C) 1992, 2003, 2006, 2008, 2009 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 2, or (at your option)
-   any later version.
+   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
@@ -12,23 +13,32 @@
    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, write to the Free Software
-   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+   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>
 
-/* David MacKenzie <djm@gnu.ai.mit.edu> */
+#if !((defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__)
+
+/* Specification.  */
+#include <unistd.h>
 
 #ifdef HAVE_UNAME
-#include <sys/utsname.h>
+# 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 (name, len)
-     char *name;
-     int len;
+gethostname (char *name, size_t len)
 {
 #ifdef HAVE_UNAME
   struct utsname uts;
@@ -47,3 +57,26 @@ gethostname (name, len)
 #endif
   return 0;
 }
+
+#else
+
+#define WIN32_LEAN_AND_MEAN
+/* Get winsock2.h. */
+#include <unistd.h>
+
+/* Get set_winsock_errno. */
+#include "w32sock.h"
+
+#undef gethostname
+
+int
+rpl_gethostname (char *name, size_t namelen)
+{
+  int r = gethostname (name, (int) namelen);
+  if (r < 0)
+    set_winsock_errno ();
+
+  return r;
+}
+
+#endif