commit 768c45ea89ccf0672737658054a73336b177b34c
Author: Ryan Voots <simcop2387@simcop2387.info>
Date:   Mon May 1 17:23:29 2017 -0700

    setting up a git repo for this

diff --git a/foo/bar b/foo/bar
new file mode 100644
index 0000000..e69de29
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..2bafbff
--- /dev/null
+++ b/main.c
@@ -0,0 +1,52 @@
+#include <stdio.h>
+#include <linux/sched.h>
+#include <sys/types.h>
+#include <sys/mount.h>
+#include <dirent.h>
+       #define _GNU_SOURCE
+       #include <sched.h>
+#include <stdint.h>
+#include <errno.h>
+
+struct args {
+    int c;
+    char **v;
+};
+
+uint8_t CSTACK[8192];
+
+int myreaddir(void *fooargs) {
+    int len;
+    struct dirent *pDirent;
+    DIR *pDir;
+    struct args *myargs = (struct args *) fooargs;
+
+    if (myargs->c < 2) {
+        printf ("Usage: testprog <dirname>\n");
+        return 1;
+    }
+
+    mount(NULL, myargs->v[1], NULL, MS_PRIVATE, NULL);
+    mount(NULL, ".", NULL, MS_PRIVATE, NULL);
+    umount(myargs->v[1]);
+
+    pDir = opendir (myargs->v[1]);
+    if (pDir == NULL) {
+        printf ("Cannot open directory '%s'\n", myargs->v[1]);
+        return 1;
+    }
+
+    while ((pDirent = readdir(pDir)) != NULL) {
+        printf ("[%s]\n", pDirent->d_name);
+    }
+    closedir (pDir);
+    return 0;
+}
+
+int main (int c, char *v[]) {
+    struct args fooargs = {c: c, v: v};
+
+    int ret = clone(&myreaddir, CSTACK+8192, CLONE_NEWUTS|CLONE_NEWNS|CLONE_NEWCGROUP|CLONE_NEWIPC|CLONE_NEWNET|CLONE_NEWPID, (void *) &fooargs);
+
+    printf("%05d %05d\n", ret, errno);
+}