[LTP] [PATCH v2] Add mkdir10 test

[Andrea Cervesato]

From: Andrea Cervesato <andrea.cervesato@suse.com>

This test has been extracted from symlink01 and it verifies that
mkdir() can't overwrite certain types of files, such as simlinks,
directories, pipes, devices, etc.

Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>
---
 runtest/syscalls                           |  2 +-
 testcases/kernel/syscalls/mkdir/.gitignore |  1 +
 testcases/kernel/syscalls/mkdir/mkdir10.c  | 57 ++++++++++++++++++++++
 3 files changed, 59 insertions(+), 1 deletion(-)
 create mode 100644 testcases/kernel/syscalls/mkdir/mkdir10.c

diff --git a/runtest/syscalls b/runtest/syscalls
index 2af7ade9c..7f4edb901 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -757,8 +757,8 @@ mkdir02 mkdir02
 mkdir03 mkdir03
 mkdir04 mkdir04
 mkdir05 mkdir05
-mkdir05A symlink01 -T mkdir05
 mkdir09 mkdir09
+mkdir10 mkdir10
 
 #mkdirat test cases
 mkdirat01 mkdirat01
diff --git a/testcases/kernel/syscalls/mkdir/.gitignore b/testcases/kernel/syscalls/mkdir/.gitignore
index 880ff50c0..416fbbd7c 100644
--- a/testcases/kernel/syscalls/mkdir/.gitignore
+++ b/testcases/kernel/syscalls/mkdir/.gitignore
@@ -3,3 +3,4 @@
 /mkdir04
 /mkdir05
 /mkdir09
+/mkdir10
diff --git a/testcases/kernel/syscalls/mkdir/mkdir10.c b/testcases/kernel/syscalls/mkdir/mkdir10.c
new file mode 100644
index 000000000..87f419916
--- /dev/null
+++ b/testcases/kernel/syscalls/mkdir/mkdir10.c
@@ -0,0 +1,57 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2000 Silicon Graphics, Inc.  All Rights Reserved.
+ *    Author: David Fenner
+ *    Copilot: Jon Hendrickson
+ * Copyright (C) 2024 Andrea Cervesato andrea.cervesato@suse.com
+ */
+
+/*\
+ * [Description]
+ *
+ * This test verifies that mkdir() can't overwrite certain generated files, such
+ * as symlinks, pipes, devices, folders, etc.
+ */
+
+#include "tst_test.h"
+
+#define FILE_FOLDER "myfolder"
+#define FILE_MYFILE "myfile"
+#define FILE_FIFO "mypipe"
+#define FILE_SYMLINK "mylink"
+#define FILE_DEVICE "/dev/null"
+
+struct tcase {
+	char *file;
+	char *msg;
+};
+
+static struct tcase tcases[] = {
+	{FILE_FOLDER,	"folder already exists"},
+	{FILE_MYFILE,	"file already exists"},
+	{FILE_FIFO,		"fifo already exists"},
+	{FILE_SYMLINK,	"symlink already exists"},
+	{FILE_DEVICE,	"device already exists"},
+};
+
+static void run(unsigned int i)
+{
+	struct tcase *tc = &tcases[i];
+
+	TST_EXP_FAIL(mkdir(tc->file, 0777), EEXIST, "%s", tc->msg);
+}
+
+static void setup(void)
+{
+	SAFE_SYMLINK(tst_get_tmpdir(), FILE_SYMLINK);
+	SAFE_MKFIFO(FILE_FIFO, 0777);
+	SAFE_MKDIR(FILE_FOLDER, 0777);
+	SAFE_TOUCH(FILE_MYFILE, 0777, NULL);
+}
+
+static struct tst_test test = {
+	.test = run,
+	.tcnt = ARRAY_SIZE(tcases),
+	.setup = setup,
+	.needs_tmpdir = 1,
+};
-- 
2.35.3