use HOST_NAME_MAX to size buffers for gethostname(2)

diff --git a/fetch-pack.c b/fetch-pack.c
index 413937e7404d163883d5d0456ebefc4e1504cd87..a75ed6c940406cfe4befc6dbc61845f6af12cfc1 100644 (file)
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -745,7 +745,7 @@ static int get_pack(struct fetch_pack_args *args,
                if (args->use_thin_pack)
                        argv_array_push(&cmd.args, "--fix-thin");
                if (args->lock_pack || unpack_limit) {
-                       char hostname[256];
+                       char hostname[HOST_NAME_MAX + 1];
                        if (gethostname(hostname, sizeof(hostname)))
                                xsnprintf(hostname, sizeof(hostname), "localhost");
                        argv_array_pushf(&cmd.args,