[LTP] [PATCH] lseek: Add negative tests for lseek

[Yang Xu]

Add negative tests for lseek(), when errno is ENXIO

Signed-off-by: Yang Xu <xuyang2018.jy@fujitsu.com>
---
 runtest/syscalls                           |  1 +
 testcases/kernel/syscalls/lseek/.gitignore |  1 +
 testcases/kernel/syscalls/lseek/lseek12.c  | 80 ++++++++++++++++++++++
 3 files changed, 82 insertions(+)
 create mode 100644 testcases/kernel/syscalls/lseek/lseek12.c

diff --git a/runtest/syscalls b/runtest/syscalls
index 62eb4c1cd..7575b27b1 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -726,6 +726,7 @@ lseek01 lseek01
 lseek02 lseek02
 lseek07 lseek07
 lseek11 lseek11
+lseek12 lseek12
 
 lstat01A symlink01 -T lstat01
 lstat01A_64 symlink01 -T lstat01_64
diff --git a/testcases/kernel/syscalls/lseek/.gitignore b/testcases/kernel/syscalls/lseek/.gitignore
index 1dc1465ee..c49728607 100644
--- a/testcases/kernel/syscalls/lseek/.gitignore
+++ b/testcases/kernel/syscalls/lseek/.gitignore
@@ -2,3 +2,4 @@
 /lseek02
 /lseek07
 /lseek11
+/lseek12
diff --git a/testcases/kernel/syscalls/lseek/lseek12.c b/testcases/kernel/syscalls/lseek/lseek12.c
new file mode 100644
index 000000000..9d80e632b
--- /dev/null
+++ b/testcases/kernel/syscalls/lseek/lseek12.c
@@ -0,0 +1,80 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2024 FUJITSU LIMITED. All Rights Reserved.
+ * Author: Yang Xu <xuyang2018.jy@fujitsu.com>
+ */
+
+/*\
+ * [Description]
+ *
+ * Verify that lseek(2) fails with
+ *
+ * - ENXIO when whence is SEEK_DATA, file offset is beyond the end of the file
+ * - ENXIO when whence is SEEK_HOLE, file offset is beyond the end of the file
+ */
+
+#define _GNU_SOURCE
+
+#include <sys/types.h>
+#include "tst_test.h"
+#include "lapi/seek.h"
+
+#define TEST_ENXIO "test_enxio"
+
+static int fd_enxio;
+
+static struct test_case_t {
+	int *fd;
+	off_t offset;
+	int whence;
+	int expected_errno;
+	char *desc;
+} tcases[] = {
+	{&fd_enxio, 10, SEEK_DATA, ENXIO,
+		"whence is SEEK_DATA, "
+		"file offset is beyond the end of the file"},
+	{&fd_enxio, 10, SEEK_HOLE, ENXIO,
+		"whence is SEEK_HOLE, "
+		"file offset is beyond the end of the file"},
+};
+
+static void setup(void)
+{
+	SAFE_TOUCH(TEST_ENXIO, 0777, NULL);
+	fd_enxio = SAFE_OPEN(TEST_ENXIO, O_RDWR, 0777);
+}
+
+static void cleanup(void)
+{
+	SAFE_CLOSE(fd_enxio);
+}
+
+static void verify_lseek(unsigned int i)
+{
+	struct test_case_t *tc = &tcases[i];
+	off_t offset;
+
+	offset = lseek(*(tc->fd), tc->offset, tc->whence);
+	if (offset == -1) {
+		if (errno == EINVAL) {
+			tst_res(TCONF, "SEEK_DATA/SEEK_HOLE are not supported");
+		} else {
+			if (errno == tc->expected_errno) {
+				tst_res(TPASS | TERRNO, tc->desc);
+			} else {
+				tst_res(TFAIL | TERRNO,
+					"lseek() failed unexpectedly");
+			}
+		}
+	} else {
+		tst_res(TFAIL, "lseek() succeeded unexpectedly");
+	}
+}
+
+static struct tst_test test = {
+	.setup = setup,
+	.cleanup = cleanup,
+	.tcnt = ARRAY_SIZE(tcases),
+	.test = verify_lseek,
+	.needs_tmpdir = 1,
+};
-- 
2.39.3