afb-config: Check environment variables

The following environment variables allows several
setting by the environment:

 * AFB_TRACEREQ, AFB_TRACEDITF, AFB_TRACESVC, AFB_TRACEEVT

    These variables allows setting of options --tracereq,
    --traceditf, --tracesvc, --traceevt

 * AFB_LDPATHS

    Set the option --ldpaths

Change-Id: I22700c658ce3fa1ceb15eab8f67adaaf41627b8f
Signed-off-by: José Bollo <jose.bollo@iot.bzh>

diff --git a/src/afb-config.c b/src/afb-config.c
index 016da83..f4aed05 100644 (file)
--- a/src/afb-config.c
+++ b/src/afb-config.c
@@ -754,12 +754,47 @@ void afb_config_dump(struct afb_config *config)
 #undef NN
 }
 
+static void on_environment_list(struct afb_config_list **to, const char *name)
+{
+       char *value = getenv(name);
+
+       if (value)
+               list_add(to, value);
+}
+
+static void on_environment_enum(int *to, const char *name, struct enumdesc *desc)
+{
+       char *value = getenv(name);
+
+       if (value) {
+               while (desc->name) {
+                       if (strcmp(desc->name, value))
+                               desc++;
+                       else {
+                               *to = desc->value;
+                               return;
+                       }
+               }
+               WARNING("Unknown value %s for environment variable %s, ignored", value, name);
+       }
+}
+
+static void parse_environment(struct afb_config *config)
+{
+       on_environment_enum(&config->tracereq, "AFB_TRACEREQ", tracereq_desc);
+       on_environment_enum(&config->traceditf, "AFB_TRACEDITF", traceditf_desc);
+       on_environment_enum(&config->tracesvc, "AFB_TRACESVC", tracesvc_desc);
+       on_environment_enum(&config->traceevt, "AFB_TRACEEVT", traceevt_desc);
+       on_environment_list(&config->ldpaths, "AFB_LDPATHS");
+}
+
 struct afb_config *afb_config_parse_arguments(int argc, char **argv)
 {
        struct afb_config *result;
 
        result = calloc(1, sizeof *result);
 
+       parse_environment(result);
        parse_arguments(argc, argv, result);
        fulfill_config(result);
        if (verbosity >= 3)