Fix TUNSETGROUP compatibility with very old Linux systems.

Our code works on "very old Linux" (Fedora-1), but needs a #define
for TUNSETGROUP to compile.  Everything else is there.

While at it, fix TUNSETGROUP error message.

Reported-By: noloader on Trac
Trac: #1152

Signed-off-by: Gert Doering <gert@greenie.muc.de>
Acked-by: Arne Schwabe <arne@rfc2549.org>
Message-Id: <20200909153725.1158-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg20932.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>

diff --git a/src/openvpn/tun.c b/src/openvpn/tun.c
index 923131ad5ee577072de888f4e23b4dffea5453e2..651cb87178cffe275ef3159b7043075a07ef91a0 100644 (file)
--- a/src/openvpn/tun.c
+++ b/src/openvpn/tun.c
@@ -1993,6 +1993,11 @@ open_tun(const char *dev, const char *dev_type, const char *dev_node, struct tun
 
 #ifdef ENABLE_FEATURE_TUN_PERSIST
 
+/* TUNSETGROUP appeared in 2.6.23 */
+#ifndef TUNSETGROUP
+# define TUNSETGROUP   _IOW('T', 206, int)
+#endif
+
 void
 tuncfg(const char *dev, const char *dev_type, const char *dev_node,
        int persist_mode, const char *username, const char *groupname,
@@ -2032,7 +2037,7 @@ tuncfg(const char *dev, const char *dev_type, const char *dev_node,
         }
         else if (ioctl(tt->fd, TUNSETGROUP, platform_state_group.gr->gr_gid) < 0)
         {
-            msg(M_ERR, "Cannot ioctl TUNSETOWNER(%s) %s", groupname, dev);
+            msg(M_ERR, "Cannot ioctl TUNSETGROUP(%s) %s", groupname, dev);
         }
     }
     close_tun(tt, ctx);