[PATCH 12/12] lwip: fix unsued result warning

[dnietoc]

From: Diego Nieto Cid <dnie...@gmail.com>

    ../../lwip/port/netif/hurdtunif.c: In function 'hurdtunif_device_init':
    ../../lwip/port/netif/hurdtunif.c:208:5: warning: ignoring return value of 
'asprintf' declared with attribute 'warn_unused_result' [-Wunused-result]
      208 |     asprintf (&tunif->comm.devname, "/dev/%s", base_name);
          |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
---
 lwip/port/netif/hurdtunif.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/lwip/port/netif/hurdtunif.c b/lwip/port/netif/hurdtunif.c
index 456dd297..54d4a0a3 100644
--- a/lwip/port/netif/hurdtunif.c
+++ b/lwip/port/netif/hurdtunif.c
@@ -202,10 +202,16 @@ hurdtunif_device_init (struct netif *netif)
     base_name = name;
 
   if (base_name != name)
-    tunif->comm.devname = strdup (name);
+    tunif->comm.devname = strdup (name), err = (tunif->comm.devname == 0 ? -1 
: 0);
   else
     /* Setting up the translator at /dev/tunX.  */
-    asprintf (&tunif->comm.devname, "/dev/%s", base_name);
+    err = asprintf (&tunif->comm.devname, "/dev/%s", base_name);
+
+  if (err == -1)
+    {
+      LWIP_DEBUGF (NETIF_DEBUG, ("hurdtunif_init: out of memory\n"));
+      return ERR_MEM;
+    }
 
   /* Set the device type */
   tunif->comm.type = ARPHRD_TUNNEL;
-- 
2.51.0