[PATCH netcfg] debug: use gai_strerror() on getnameinfo() failure

[Julien Cristau <jcristau@debian.org>]

getnameinfo() returns an error code which can be passed to
gai_strerror() for human consumption.  So use that instead of
strerror(errno) unless the code is EAI_SYSTEM.

Signed-off-by: Julien Cristau <jcristau@debian.org>
Cc: Philipp Kern <pkern@debian.org>
---
 netcfg-common.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/netcfg-common.c b/netcfg-common.c
index 0bc4e43..4134250 100644
--- a/netcfg-common.c
+++ b/netcfg-common.c
@@ -1245,7 +1245,7 @@ int get_hostname_from_dns (const struct netcfg_interface *interface, char *hostn
         }
 
         if (err) {
-            di_debug("getnameinfo() returned %i: errno %i (%s)", err, errno, strerror(errno));
+            di_debug("getnameinfo() returned %i (%s)", err, err == EAI_SYSTEM ? strerror(errno) : gai_strerror(err));
         }
 
         if (err == 0) {
@@ -1291,7 +1291,7 @@ int get_hostname_from_dns (const struct netcfg_interface *interface, char *hostn
                                     : sizeof(struct sockaddr_in6),
                               hostname, max_hostname_len, NULL, 0, NI_NAMEREQD);
             if (err) {
-                di_debug("getnameinfo() returned %i: errno %i (%s)", err, errno, strerror(errno));
+                di_debug("getnameinfo() returned %i (%s)", err, err == EAI_SYSTEM ? strerror(errno) : gai_strerror(err));
             }
                               
             if (err == 0) {
-- 
1.7.10.4