1 files changed, 130 insertions, 0 deletions
diff --git a/tests/sys/cddl/zfs/bin/largest_file.c b/tests/sys/cddl/zfs/bin/largest_file.c
new file mode 100644
index 000000000000..b732a2207c8b
--- /dev/null
+++ b/tests/sys/cddl/zfs/bin/largest_file.c
@@ -0,0 +1,130 @@
+/*
+ * 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 http://www.opensolaris.org/os/licensing.
+ * 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.
+ */
+
+
+#include "file_common.h"
+#include <sys/param.h>
+#include <signal.h>
+#include <stdio.h>
+
+/*
+ * --------------------------------------------------------------
+ *
+ *	Assertion:
+ *		The last byte of the largest file size can be
+ *		accessed without any errors.  Also, the writing
+ *		beyond the last byte of the largest file size
+ *		will produce an errno of EFBIG.
+ *
+ * --------------------------------------------------------------
+ *	If the write() system call below returns a "1",
+ *	then the last byte can be accessed.
+ * --------------------------------------------------------------
+ */
+static void	sigxfsz(int);
+static void	usage(char *);
+
+int
+main(int argc, char **argv)
+{
+	int		fd = 0;
+	off_t		offset = (OFF_MAX - 1);
+	off_t		lseek_ret = 0;
+	int		write_ret = 0;
+	int		err = 0;
+	char		mybuf[5];
+	char		*testfile;
+
+	if (argc != 2) {
+		usage(argv[0]);
+	}
+
+	(void) sigset(SIGXFSZ, sigxfsz);
+
+	testfile = strdup(argv[1]);
+
+	fd = open(testfile, O_CREAT | O_RDWR);
+	if (fd < 0) {
+		perror("Failed to create testfile");
+		err = errno;
+		goto out;
+	}
+
+	lseek_ret = lseek(fd, offset, SEEK_SET);
+	if (lseek_ret < 0) {
+		perror("Failed to seek to end of testfile");
+		err = errno;
+		goto out;
+	}
+
+	write_ret = write(fd, mybuf, 1);
+	if (write_ret < 0) {
+		perror("Failed to write to end of file");
+		err = errno;
+		goto out;
+	}
+
+	offset = 0;
+	lseek_ret = lseek(fd, offset, SEEK_CUR);
+	if (lseek_ret < 0) {
+		perror("Failed to seek to end of file");
+		err = errno;
+		goto out;
+	}
+
+	write_ret = write(fd, mybuf, 1);
+	if (write_ret < 0) {
+		if (errno == EFBIG) {
+			(void) printf("write errno=EFBIG: success\n");
+			err = 0;
+		} else {
+			perror("Did not receive EFBIG");
+			err = errno;
+		}
+	} else {
+		(void) printf("write completed successfully, test failed\n");
+		err = 1;
+	}
+
+out:
+	(void) unlink(testfile);
+	free(testfile);
+	return (err);
+}
+
+static void
+usage(char *name)
+{
+	(void) printf("%s <testfile>\n", name);
+	exit(1);
+}
+
+/* ARGSUSED */
+static void
+sigxfsz(int signo)
+{
+	(void) printf("\nlargest_file: sigxfsz() caught SIGXFSZ\n");
+}