LibCore: Add syscall wrapper for access()

2 files changed, 19 insertions, 2 deletions

diff --git a/Userland/Libraries/LibCore/System.cpp b/Userland/Libraries/LibCore/System.cpp
index 01fe7e50ae..00fdfb7f6e 100644
--- a/Userland/Libraries/LibCore/System.cpp
+++ b/Userland/Libraries/LibCore/System.cpp
@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2021-2022, Andreas Kling <kling@serenityos.org>
- * Copyright (c) 2021, Kenneth Myhra <kennethmyhra@gmail.com>
+ * Copyright (c) 2021-2022, Kenneth Myhra <kennethmyhra@gmail.com>
  * Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
  * Copyright (c) 2022, Matthias Zimmerman <matthias291999@gmail.com>
  *
@@ -1119,4 +1119,20 @@ ErrorOr<void> unlockpt(int fildes)
     return {};
 }
 
+ErrorOr<void> access(StringView pathname, int mode)
+{
+    if (pathname.is_null())
+        return Error::from_syscall("access"sv, -EFAULT);
+
+#ifdef __serenity__
+    int rc = ::syscall(Syscall::SC_access, pathname.characters_without_null_termination(), pathname.length(), mode);
+    HANDLE_SYSCALL_RETURN_VALUE("access"sv, rc, {});
+#else
+    String path_string = pathname;
+    if (::access(path_string.characters(), mode) < 0)
+        return Error::from_syscall("access"sv, -errno);
+    return {};
+#endif
+}
+
 }
diff --git a/Userland/Libraries/LibCore/System.h b/Userland/Libraries/LibCore/System.h
index b8bf14eae4..2489860883 100644
--- a/Userland/Libraries/LibCore/System.h
+++ b/Userland/Libraries/LibCore/System.h
@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
- * Copyright (c) 2021, Kenneth Myhra <kennethmyhra@gmail.com>
+ * Copyright (c) 2021-2022, Kenneth Myhra <kennethmyhra@gmail.com>
  * Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
@@ -150,5 +150,6 @@ ErrorOr<void> setenv(StringView, StringView, bool);
 ErrorOr<int> posix_openpt(int flags);
 ErrorOr<void> grantpt(int fildes);
 ErrorOr<void> unlockpt(int fildes);
+ErrorOr<void> access(StringView pathname, int mode);
 
 }