Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Zhangjin Wu <falcon@tinylab.org>
To:     thomas@t-8ch.de, w@1wt.eu
Cc:     falcon@tinylab.org, arnd@arndb.de, linux-kernel@vger.kernel.org,
        linux-kselftest@vger.kernel.org
Subject: [PATCH v2 08/15] tools/nolibc: add rmdir() support
Date:   Fri, 30 Jun 2023 07:45:00 +0800
Message-Id: <7a2cde610506ca288742b4e52833572c4341ac20.1688078605.git.falcon@tinylab.org>
In-Reply-To: <cover.1688078604.git.falcon@tinylab.org>
References: <cover.1688078604.git.falcon@tinylab.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Feedback-ID: bizesmtp:tinylab.org:qybglogicsvrgz:qybglogicsvrgz5a-1
Precedence: bulk

a reverse operation of mkdir() is meaningful, add rmdir() here.

required by nolibc-test to remove /proc while CONFIG_PROC_FS is not
enabled.

Signed-off-by: Zhangjin Wu <falcon@tinylab.org>
---
 tools/include/nolibc/sys.h | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/tools/include/nolibc/sys.h b/tools/include/nolibc/sys.h
index b6c33c40c037..7b052958e2ae 100644
--- a/tools/include/nolibc/sys.h
+++ b/tools/include/nolibc/sys.h
@@ -610,6 +610,28 @@ int mkdir(const char *path, mode_t mode)
 	return __sysret(sys_mkdir(path, mode));
 }
 
+/*
+ * int rmdir(const char *path);
+ */
+
+static __attribute__((unused))
+int sys_rmdir(const char *path)
+{
+#ifdef __NR_rmdir
+	return my_syscall1(__NR_rmdir, path);
+#elif defined(__NR_unlinkat)
+	return my_syscall3(__NR_unlinkat, AT_FDCWD, path, AT_REMOVEDIR);
+#else
+	return -ENOSYS;
+#endif
+}
+
+static __attribute__((unused))
+int rmdir(const char *path)
+{
+	return __sysret(sys_rmdir(path));
+}
+
 
 /*
  * int mknod(const char *path, mode_t mode, dev_t dev);
-- 
2.25.1