[LTP] [PATCH 2/3] llistxattr/llistxattr02.c: add new testcase

[Xiao Yang]

1) llistxattr(2) fails if the size of the list buffer is too small to
   hold the result and set errno to ERANGE.
2) llistxattr(2) fails if path is an empty string and set errno to ENOENT.
3) llistxattr(2) fails when attempted to read from a invalid address and
   set set errno to EFAULT.

Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
---
 runtest/ltplite                                    |   1 +
 runtest/syscalls                                   |   1 +
 testcases/kernel/syscalls/.gitignore               |   1 +
 .../kernel/syscalls/llistxattr/llistxattr02.c      | 143 +++++++++++++++++++++
 4 files changed, 146 insertions(+)
 create mode 100644 testcases/kernel/syscalls/llistxattr/llistxattr02.c

diff --git a/runtest/ltplite b/runtest/ltplite
index 0a56c3a..f752150 100644
--- a/runtest/ltplite
+++ b/runtest/ltplite
@@ -389,6 +389,7 @@ link08 link08
 listen01 listen01
 
 llistxattr01 llistxattr01
+llistxattr02 llistxattr02
 
 llseek01 llseek01
 llseek02 llseek02
diff --git a/runtest/syscalls b/runtest/syscalls
index ffd8be3..5652da1 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -515,6 +515,7 @@ linkat02 linkat02
 listen01 listen01
 
 llistxattr01 llistxattr01
+llistxattr02 llistxattr02
 
 llseek01 llseek01
 llseek02 llseek02
diff --git a/testcases/kernel/syscalls/.gitignore b/testcases/kernel/syscalls/.gitignore
index b283761..053c067 100644
--- a/testcases/kernel/syscalls/.gitignore
+++ b/testcases/kernel/syscalls/.gitignore
@@ -475,6 +475,7 @@
 /linkat/linkat02
 /listen/listen01
 /llistxattr/llistxattr01
+/llistxattr/llistxattr02
 /llseek/llseek01
 /llseek/llseek02
 /llseek/llseek03
diff --git a/testcases/kernel/syscalls/llistxattr/llistxattr02.c b/testcases/kernel/syscalls/llistxattr/llistxattr02.c
new file mode 100644
index 0000000..d40b619
--- /dev/null
+++ b/testcases/kernel/syscalls/llistxattr/llistxattr02.c
@@ -0,0 +1,143 @@
+/*
+* Copyright (c) 2016 Fujitsu Ltd.
+* Author: Xiao Yang <yangx.jy@cn.fujitsu.com>
+*
+* This program is free software; you can redistribute it and/or modify it
+* under the terms of version 2 of the GNU General Public License as
+* published by the Free Software Foundation.
+*
+* This program is distributed in the hope that it would be useful, but
+* WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+*
+* You should have received a copy of the GNU General Public License
+* alone with this program.
+*/
+
+/*
+* Test Name: llistxattr02
+*
+* Description:
+* 1) llistxattr(2) fails if the size of the list buffer is too small
+* to hold the result.
+* 2) llistxattr(2) fails if path is an empty string.
+* 3) llistxattr(2) fails when attempted to read from a invalid address.
+*
+* Expected Result:
+* 1) llistxattr(2) should return -1 and set errno to ERANGE.
+* 2) llistxattr(2) should return -1 and set errno to ENOENT.
+* 3) llistxattr(2) should return -1 and set errno to EFAULT.
+*/
+
+#include "config.h"
+#include <errno.h>
+#include <sys/types.h>
+
+#ifdef HAVE_ATTR_XATTR_H
+#include <attr/xattr.h>
+#endif
+
+#include "test.h"
+#include "safe_macros.h"
+#include "safe_file_ops.h"
+
+char *TCID = "llistxattr02";
+
+#ifdef HAVE_ATTR_XATTR_H
+#define SECURITY_KEY	"security.symtest"
+#define VALUE	"test"
+#define VALUE_SIZE	4
+
+static struct test_case {
+	const char *path;
+	size_t size;
+	int exp_err;
+} tc[] = {
+	/* test1 */
+	{"symlink", 1, ERANGE},
+	/* test2 */
+	{"", 20, ENOENT},
+	/* test3 */
+	{NULL, 20, EFAULT}
+};
+
+static void verify_llistxattr(struct test_case *tc);
+static void setup(void);
+static void cleanup(void);
+
+int TST_TOTAL = ARRAY_SIZE(tc);
+
+int main(int ac, char **av)
+{
+	int lc;
+	int i;
+
+	tst_parse_opts(ac, av, NULL, NULL);
+
+	setup();
+
+	for (lc = 0; TEST_LOOPING(lc); lc++) {
+		tst_count = 0;
+		for (i = 0; i < TST_TOTAL; i++)
+			verify_llistxattr(&tc[i]);
+	}
+
+	cleanup();
+	tst_exit();
+}
+
+static void verify_llistxattr(struct test_case *tc)
+{
+	char buf[tc->size];
+
+	TEST(llistxattr(tc->path, buf, tc->size));
+	if (TEST_RETURN != -1) {
+		tst_resm(TFAIL, "llistxattr() succeeded unexpectedly");
+	} else {
+		if (TEST_ERRNO != tc->exp_err) {
+			tst_resm(TFAIL | TTERRNO, "llistxattr() failed "
+				 "unexpectedlly, expected errno is %s",
+				 tst_strerrno(tc->exp_err));
+		} else {
+			tst_resm(TPASS | TTERRNO,
+				 "llistxattr() failed as expected");
+		}
+	}
+}
+
+static void setup(void)
+{
+	int n;
+
+	tst_sig(NOFORK, DEF_HANDLER, cleanup);
+
+	TEST_PAUSE;
+
+	tst_tmpdir();
+
+	SAFE_TOUCH(cleanup, "testfile", 0644, NULL);
+
+	SAFE_SYMLINK(cleanup, "testfile", "symlink");
+
+	n = lsetxattr("symlink", SECURITY_KEY, VALUE, VALUE_SIZE, XATTR_CREATE);
+	if (n == -1) {
+		if (errno == ENOTSUP) {
+			tst_brkm(TCONF, cleanup, "no xattr support in fs or "
+				 "mounted without user_xattr option");
+		} else {
+			tst_brkm(TFAIL | TERRNO, cleanup, "lsetxattr() failed");
+		}
+	}
+}
+
+static void cleanup(void)
+{
+	tst_rmdir();
+}
+
+#else /* HAVE_ATTR_XATTR_H */
+int main(int ac, char **av)
+{
+	tst_brkm(TCONF, NULL, "<attr/xattr.h> does not exist.");
+}
+#endif
-- 
1.8.3.1