prefill: check that CA path is a directory, use name ca_dir for clarity

diff --git a/modules/prefill/prefill.lua b/modules/prefill/prefill.lua
index 4049f388657e464f6bb078f0f11c5dfb16fd02c3..c81d9aa2846de90869e58c6ad691249c4ec46443 100644 (file)
--- a/modules/prefill/prefill.lua
+++ b/modules/prefill/prefill.lua
@@ -4,7 +4,7 @@ local lfs = require('lfs')
 
 local rz_url = "https://www.internic.net/domain/root.zone"
 local rz_local_fname = "root.zone"
-local rz_ca_path = nil
+local rz_ca_dir = nil
 local rz_event_id = nil
 
 local rz_default_interval = 86400
@@ -83,7 +83,7 @@ local function check_time()
        end
 
        log("[prefill] downloading root zone...")
-       local rzone, err = https_fetch(true, rz_url, rz_ca_path)
+       local rzone, err = https_fetch(rz_url, rz_ca_dir)
        if rzone == nil then
                log(string.format("[prefill] fetch of `%s` failed: %s", rz_url, err))
                rz_cur_interval = rz_https_fail_interval;
@@ -140,11 +140,14 @@ function prefill.config(config)
                rz_cur_interval = config.interval
        end
 
-       if not config.ca_path then
+       if not config.ca_dir then
                error('[prefill] option ca_dir must point '
                        .. 'to a directory with CA certificates in PEM format')
+       else
+               local _, dir_obj = lfs.dir(config.ca_dir)
+               dir_obj:close()
        end
-       rz_ca_path = config.ca_path
+       rz_ca_dir = config.ca_dir
        log('[prefill] refresh interval: %i s', rz_default_interval)
 
        -- ability to change intervals