doc: use ASCII in .texi files where UTF-8 isn't needed

[gnulib.git] / lib / getdomainname.c

diff --git a/lib/getdomainname.c b/lib/getdomainname.c
index ce1e200..e914cfb 100644 (file)
--- a/lib/getdomainname.c
+++ b/lib/getdomainname.c
@@ -1,10 +1,11 @@
 /* getdomainname emulation for systems that doesn't have it.
-   Copyright (C) 2003 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or modify
+   Copyright (C) 2003, 2006, 2008, 2010-2014 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
@@ -12,25 +13,28 @@
    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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 /* Written by Simon Josefsson.  */
 
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <config.h>
 
 /* Specification. */
-#include "getdomainname.h"
+#include <unistd.h>
 
+#include <limits.h>
 #include <string.h>
 #include <errno.h>
 
+#if HAVE_SYSINFO && HAVE_SYS_SYSTEMINFO_H /* IRIX, OSF/1, Solaris */
+# include <sys/systeminfo.h>
+#endif
+
 /* Return the NIS domain name of the machine.
    WARNING! The NIS domain name is unrelated to the fully qualified host name
             of the machine.  It is also unrelated to email addresses.
-   WARNING! The NIS domain name is usually the empty string when not using NIS.
+   WARNING! The NIS domain name is usually the empty string or "(none)" when
+            not using NIS.
 
    Put up to LEN bytes of the NIS domain name into NAME.
    Null terminate it if the name is shorter than LEN.
@@ -38,8 +42,32 @@
    Return 0 if successful, otherwise set errno and return -1.  */
 int
 getdomainname (char *name, size_t len)
+#undef getdomainname
 {
-  const char *result = "";     /* Hardcode your domain name if you want.  */
+#if HAVE_GETDOMAINNAME                 /* Mac OS X, FreeBSD, AIX, IRIX, OSF/1 */
+  extern int getdomainname (char *, int);
+
+  if (len > INT_MAX)
+    len = INT_MAX;
+  return getdomainname (name, (int) len);
+#elif HAVE_SYSINFO && HAVE_SYS_SYSTEMINFO_H && defined SI_SRPC_DOMAIN
+                                       /* Solaris */
+  int ret;
+
+  /* The third argument is a 'long', but the return value must fit in an
+     'int', therefore it's better to avoid arguments > INT_MAX.  */
+  ret = sysinfo (SI_SRPC_DOMAIN, name, len > INT_MAX ? INT_MAX : len);
+  if (ret < 0)
+    /* errno is set here.  */
+    return -1;
+  if (ret > len)
+    {
+      errno = EINVAL;
+      return -1;
+    }
+  return 0;
+#else                                  /* HP-UX, Cygwin, mingw */
+  const char *result = "";      /* Hardcode your domain name if you want.  */
   size_t result_len = strlen (result);
 
   if (result_len > len)
@@ -51,4 +79,5 @@ getdomainname (char *name, size_t len)
   if (result_len < len)
     name[result_len] = '\0';
   return 0;
+#endif
 }