Unify usage of function gethostname

man gethostanme says:
NOTES
   SUSv2  guarantees  that  "Host  names  are  limited  to   255   bytes".
   POSIX.1-2001 guarantees that "Host names (not including the terminating
   null  byte)  are  limited   to   HOST_NAME_MAX   bytes".    On   Linux,
   HOST_NAME_MAX  is  defined  with the value 64, which has been the limit
   since Linux 1.0 (earlier kernels imposed a limit of 8 bytes).

Reviewed-by: Pavel Březina <pbrezina@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/resolv/async_resolv_utils.c b/src/resolv/async_resolv_utils.c
index b24ae603f..c5ae5f9d4 100644
--- a/src/resolv/async_resolv_utils.c
+++ b/src/resolv/async_resolv_utils.c
@@ -44,7 +44,7 @@ resolv_get_domain_send(TALLOC_CTX *mem_ctx,
     struct resolv_get_domain_state *state = NULL;
     struct tevent_req *req = NULL;
     struct tevent_req *subreq = NULL;
-    char system_hostname[HOST_NAME_MAX];
+    char system_hostname[HOST_NAME_MAX + 1];
     errno_t ret;
 
     req = tevent_req_create(mem_ctx, &state,
@@ -63,7 +63,7 @@ resolv_get_domain_send(TALLOC_CTX *mem_ctx,
                                         ret, strerror(ret));
             goto immediately;
         }
-        system_hostname[HOST_NAME_MAX-1] = '\0';
+        system_hostname[HOST_NAME_MAX] = '\0';
         hostname = system_hostname;
     }