1 files changed, 101 insertions, 0 deletions
diff --git a/tests/zfs-tests/cmd/file/file_fadvise.c b/tests/zfs-tests/cmd/file/file_fadvise.c
new file mode 100644
index 000000000000..d64e2dea3696
--- /dev/null
+++ b/tests/zfs-tests/cmd/file/file_fadvise.c
@@ -0,0 +1,101 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or https://opensource.org/licenses/CDDL-1.0.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*
+ * Copyright (c) 2022 by Information2 Software, Inc. All rights reserved.
+ */
+
+#include "file_common.h"
+#include <sys/types.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+
+/*
+ * Call fadvise to prefetch data
+ */
+static const char *execname = "file_fadvise";
+
+static void
+usage(void)
+{
+	(void) fprintf(stderr,
+	    "usage: %s -f filename -a advise \n", execname);
+}
+
+int
+main(int argc, char *argv[])
+{
+	char *filename = NULL;
+	int advise = 0;
+	int fd, ch;
+	int	err = 0;
+
+	while ((ch = getopt(argc, argv, "a:f:")) != EOF) {
+		switch (ch) {
+		case 'a':
+			advise = atoll(optarg);
+			break;
+		case 'f':
+			filename = optarg;
+			break;
+		case '?':
+			(void) printf("unknown arg %c\n", optopt);
+			usage();
+			break;
+		}
+	}
+
+	if (!filename) {
+		(void) printf("Filename not specified (-f <file>)\n");
+		err++;
+	}
+
+	if (advise < POSIX_FADV_NORMAL || advise > POSIX_FADV_NOREUSE) {
+		(void) printf("advise is invalid\n");
+		err++;
+	}
+
+	if (err) {
+		usage(); /* no return */
+		return (1);
+	}
+
+	if ((fd = open(filename, O_RDWR, 0666)) < 0) {
+		perror("open");
+		return (1);
+	}
+
+	if (posix_fadvise(fd, 0, 0, advise) != 0) {
+		perror("posix_fadvise");
+		close(fd);
+		return (1);
+	}
+
+	close(fd);
+
+	return (0);
+}