Fix __warn_unused_result__, add more of it and fix the resulting warnings.

[meshlink] / examples / manynodes.c

diff --git a/examples/manynodes.c b/examples/manynodes.c
index fbfd215fe171b797aa5d2335c766af54578bf081..d9fb0a41fee1f826458a4a18af3a0d20f24e95d9 100644 (file)
--- a/examples/manynodes.c
+++ b/examples/manynodes.c
@@ -71,8 +71,11 @@ static void linkmesh() {
 
                for(int j = i + 1; j < n; j++) {
                        char *dataj = meshlink_export(mesh[j]);
-                       meshlink_import(mesh[i], dataj);
-                       meshlink_import(mesh[j], datai);
+
+                       if(!meshlink_import(mesh[i], dataj) || !meshlink_import(mesh[j], datai)) {
+                               fprintf(stderr, "Could not exchange keys between %s and %s: %s\n", mesh[i]->name, mesh[j]->name, meshlink_strerror(meshlink_errno));
+                       }
+
                        free(dataj);
                }
 
@@ -248,7 +251,10 @@ static void parse_command(char *buf) {
                        return;
                }
 
-               meshlink_blacklist(mesh[nodeindex], node);
+               if(!meshlink_blacklist(mesh[nodeindex], node)) {
+                       fprintf(stderr, "Error blacklising '%s': %s", arg, meshlink_strerror(meshlink_errno));
+                       return;
+               }
 
                printf("Node '%s' blacklisted.\n", arg);
        } else if(!strcasecmp(buf, "whitelist")) {
@@ -264,7 +270,10 @@ static void parse_command(char *buf) {
                        return;
                }
 
-               meshlink_whitelist(mesh[nodeindex], node);
+               if(!meshlink_whitelist(mesh[nodeindex], node)) {
+                       fprintf(stderr, "Error whitelising '%s': %s", arg, meshlink_strerror(meshlink_errno));
+                       return;
+               }
 
                printf("Node '%s' whitelisted.\n", arg);
        } else if(!strcasecmp(buf, "who")) {