From b9adc98473593da055c45f036219a469ceddbc34 Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Mon, 28 Aug 2023 13:27:09 +0200
Subject: [PATCH] CryptoPkg/CrtLib: add access/open/read/write/close syscalls

Needed by rhel downstream openssl patches, they use unix syscalls
for file access (instead of fopen + friends like the rest of the
code base).  No actual file access is needed for edk2, so just
add stubs to make linking work.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 .../Library/BaseCryptLib/SysCall/CrtWrapper.c | 46 +++++++++++++++++++
 CryptoPkg/Library/Include/CrtLibSupport.h     | 41 +++++++++++++++++
 2 files changed, 87 insertions(+)

diff --git a/CryptoPkg/Library/BaseCryptLib/SysCall/CrtWrapper.c b/CryptoPkg/Library/BaseCryptLib/SysCall/CrtWrapper.c
index b114cc069a..6ba751c1f1 100644
--- a/CryptoPkg/Library/BaseCryptLib/SysCall/CrtWrapper.c
+++ b/CryptoPkg/Library/BaseCryptLib/SysCall/CrtWrapper.c
@@ -589,6 +589,52 @@ fread (
   return 0;
 }
 
+int
+access(
+  const char*,
+  int
+  )
+{
+  return -1;
+}
+
+int
+open (
+  const char *,
+  int
+  )
+{
+  return -1;
+}
+
+ssize_t
+read (
+  int,
+  void*,
+  size_t
+  )
+{
+  return -1;
+}
+
+ssize_t
+write (
+  int,
+  const void*,
+  size_t
+  )
+{
+  return -1;
+}
+
+int
+close (
+  int
+  )
+{
+  return -1;
+}
+
 uid_t
 getuid (
   void
diff --git a/CryptoPkg/Library/Include/CrtLibSupport.h b/CryptoPkg/Library/Include/CrtLibSupport.h
index cd51e197e7..b1616a7b4c 100644
--- a/CryptoPkg/Library/Include/CrtLibSupport.h
+++ b/CryptoPkg/Library/Include/CrtLibSupport.h
@@ -79,6 +79,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 //
 // Definitions for global constants used by CRT library routines
 //
+#define EINTR         4
 #define EINVAL        22              /* Invalid argument */
 #define EAFNOSUPPORT  47              /* Address family not supported by protocol family */
 #define INT_MAX       0x7FFFFFFF      /* Maximum (signed) int value */
@@ -103,6 +104,15 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 #define NS_INADDRSZ   4   /*%< IPv4 T_A */
 #define NS_IN6ADDRSZ  16  /*%< IPv6 T_AAAA */
 
+#define O_RDONLY        00000000
+#define O_WRONLY        00000001
+#define O_RDWR          00000002
+
+#define R_OK  4
+#define W_OK  2
+#define X_OK  1
+#define F_OK  0
+
 //
 // Basic types mapping
 //
@@ -329,6 +339,37 @@ fprintf     (
   ...
   );
 
+int
+access(
+  const char*,
+  int
+  );
+
+int
+open (
+  const char *,
+  int
+  );
+
+ssize_t
+read (
+  int,
+  void*,
+  size_t
+  );
+
+ssize_t
+write (
+  int,
+  const void*,
+  size_t
+  );
+
+int
+close (
+  int
+  );
+
 time_t
 time        (
   time_t *