1 files changed, 64 insertions, 0 deletions
diff --git a/system_cmds/wait4path/wait4path.c b/system_cmds/wait4path/wait4path.c
new file mode 100644
index 0000000..997f433
--- /dev/null
+++ b/system_cmds/wait4path/wait4path.c
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2015 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/event.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+int
+main(int argc, char *argv[])
+{
+	int kq = kqueue();
+	struct kevent kev;
+	struct stat sb;
+
+	if (argc != 2) {
+		fprintf(stderr, "usage: %s <object on mount point>\n", argv[0]);
+		exit(EXIT_FAILURE);
+	}
+
+	EV_SET(&kev, 0, EVFILT_FS, EV_ADD, 0, 0, 0);
+
+	if (kevent(kq, &kev, 1, NULL, 0, NULL) == -1) {
+		fprintf(stderr, "adding EVFILT_FS to kqueue failed: %s\n",
+				strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+
+	if (stat(argv[1], &sb) == 0) {
+		exit(EXIT_SUCCESS);
+	}
+
+	for (;;) {
+		kevent(kq, NULL, 0, &kev, 1, NULL);
+		if (stat(argv[1], &sb) == 0) {
+			break;
+		}
+	}
+
+	exit(EXIT_SUCCESS);
+}