+ // Ensure target exists
+ mkdir(target, S_IRWXU|S_IRWXG|S_IRWXO);
+
+ return hw_mount(source, target, NULL, MS_BIND);
+}
+
+int hw_umount(const char* source, const char* prefix) {
+ char target[PATH_MAX];
+ int r;
+
+ if (prefix)
+ r = snprintf(target, sizeof(target) - 1, "%s/%s", prefix, source);
+ else
+ r = snprintf(target, sizeof(target) - 1, "%s", source);
+ if (r < 0)
+ return r;
+
+ // Perform umount
+ r = umount2(target, 0);
+ if (r) {
+ switch (errno) {
+ // Try again with force if umount wasn't successful
+ case EBUSY:
+ sleep(1);
+
+ r = umount2(target, MNT_FORCE);
+ break;
+
+ // target wasn't a mountpoint. Ignore.
+ case EINVAL:
+ r = 0;
+ break;
+ }