NOMERGE make namespace order verbose

ns.c

@@ -6,6 +6,7 @@
 
 #include <err.h>
 #include <errno.h>
+#include <stdio.h>
 #include <fcntl.h>
 #include <sched.h>
 #include <stdlib.h>
@@ -104,13 +105,21 @@ static int is_setns(const struct nsid *ns)
    are entered via unshare (or not changed at all). */
 static int cmp_nsids(const void *lhs, const void *rhs)
 {
+	const struct nsid *lns = lhs;
+	const struct nsid *rns = rhs;
+    printf("\tcomparing lhs=%d (is_setns=%d) with rhs=%d (is_setns=%d): ",
+            lns->ns, is_setns(lhs),
+            rns->ns, is_setns(rhs));
 	int diff = is_setns(rhs) - is_setns(lhs);
 	if (diff != 0) {
+        printf("%d via setns diff\n", diff);
 		return diff;
 	}
 	/* Both namespaces are the same kind -- keep ordering intact by comparing
 	   pointer values. */
-	return (int) ((intptr_t) lhs - (intptr_t) rhs);
+	diff = (int) ((intptr_t) lhs - (intptr_t) rhs);
+    printf("%d via pointer comparison\n", diff);
+    return diff;
 }
 
 static void ns_enter_one(struct nsid *ns)
@@ -157,10 +166,19 @@ void ns_enter_prefork(struct nsid *namespaces, size_t *len)
 	if (capable(BST_CAP_SYS_ADMIN)) {
 		qsort(namespaces, *len, sizeof (namespaces[0]),
 				cmp_nsids);
-	}
+        printf("performed sort: ");
+	} else {
+        printf("skipped sort: ");
+    }
+	struct nsid *ns = &namespaces[0];
+    printf("POST SORT: ");
+	for (; ns < namespaces + *len; ++ns) {
+        printf("%d (%d), ", ns->ns, ns->action);
+    }
+    printf("\n");
 
 	struct nsid *first_postfork = NULL;
-	struct nsid *ns = &namespaces[0];
+	ns = &namespaces[0];
 	for (; ns < namespaces + *len; ++ns) {
 		if (ns->action != NSACTION_SHARE_WITH_PARENT && is_postfork_ns(ns)) {
 			first_postfork = ns;