[LTP] [PATCH 3/3] llistxattr/llistxattr03.c: add new testcase

[Xiao Yang]

llistxattr(2) with an empty buffer of size zero can return
the current size of the list of extended attribute names.

Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
---
 runtest/ltplite                                    |   1 +
 runtest/syscalls                                   |   1 +
 testcases/kernel/syscalls/.gitignore               |   1 +
 .../kernel/syscalls/llistxattr/llistxattr03.c      | 133 +++++++++++++++++++++
 4 files changed, 136 insertions(+)
 create mode 100644 testcases/kernel/syscalls/llistxattr/llistxattr03.c

diff --git a/runtest/ltplite b/runtest/ltplite
index f752150..bc2541b 100644
--- a/runtest/ltplite
+++ b/runtest/ltplite
@@ -390,6 +390,7 @@ listen01 listen01
 
 llistxattr01 llistxattr01
 llistxattr02 llistxattr02
+llistxattr03 llistxattr03
 
 llseek01 llseek01
 llseek02 llseek02
diff --git a/runtest/syscalls b/runtest/syscalls
index 5652da1..06a8cc2 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -516,6 +516,7 @@ listen01 listen01
 
 llistxattr01 llistxattr01
 llistxattr02 llistxattr02
+llistxattr03 llistxattr03
 
 llseek01 llseek01
 llseek02 llseek02
diff --git a/testcases/kernel/syscalls/.gitignore b/testcases/kernel/syscalls/.gitignore
index 053c067..e902ad8 100644
--- a/testcases/kernel/syscalls/.gitignore
+++ b/testcases/kernel/syscalls/.gitignore
@@ -476,6 +476,7 @@
 /listen/listen01
 /llistxattr/llistxattr01
 /llistxattr/llistxattr02
+/llistxattr/llistxattr03
 /llseek/llseek01
 /llseek/llseek02
 /llseek/llseek03
diff --git a/testcases/kernel/syscalls/llistxattr/llistxattr03.c b/testcases/kernel/syscalls/llistxattr/llistxattr03.c
new file mode 100644
index 0000000..dd5ab52
--- /dev/null
+++ b/testcases/kernel/syscalls/llistxattr/llistxattr03.c
@@ -0,0 +1,133 @@
+/*
+* 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: llistxattr03
+*
+* Description:
+* llistxattr(2) with an empty buffer of size zero can return
+* the current size of the list of extended attribute names.
+*/
+
+#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 = "llistxattr03";
+
+#ifdef HAVE_ATTR_XATTR_H
+#define SECURITY_KEY	"security.symtest"
+#define SECURITY_KEY_INIT	"security.selinux"
+#define VALUE	"test"
+#define VALUE_SIZE	4
+#define KEY_SIZE	17
+
+static void verify_llistxattr(void);
+static void setup(void);
+static void cleanup(void);
+
+int TST_TOTAL = 1;
+
+int main(int ac, char **av)
+{
+	int lc;
+
+	tst_parse_opts(ac, av, NULL, NULL);
+
+	setup();
+
+	for (lc = 0; TEST_LOOPING(lc); lc++) {
+		tst_count = 0;
+
+		verify_llistxattr();
+	}
+
+	cleanup();
+	tst_exit();
+}
+
+static void verify_llistxattr(void)
+{
+	int se = 1;
+	int n;
+
+	/* check selinux initialized attr */
+	n = lgetxattr("symlink", SECURITY_KEY_INIT, NULL, 0);
+	if (n == -1) {
+		if (errno == ENOATTR) {
+			se = 0;
+		} else {
+			tst_brkm(TFAIL | TERRNO, cleanup,
+				 "lgetxattr() failed");
+		}
+	}
+
+	TEST(llistxattr("symlink", NULL, 0));
+	if (TEST_RETURN == -1) {
+		tst_resm(TFAIL | TTERRNO, "llistxattr() failed");
+		return;
+	}
+
+	if (TEST_RETURN == KEY_SIZE*(1 + se))
+		tst_resm(TPASS, "llistxattr() returned the size successfully");
+	else
+		tst_resm(TFAIL, "llistxattr() failed to return the size");
+}
+
+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