libc: minimal: include: move fcntl.h to posix

The `fcntl.h` header has never been a part of ISO C so move it to
`include/zephyr/posix`.

To ensure a smooth migration, a header was left in
`lib/libc/minimal/include` that prints a deprecation warning.

Users should either include `<zephyr/posix/fcntl.h>` or switch to
`CONFIG_POSIX_API=y`.

Signed-off-by: Chris Friedt <cfriedt@meta.com>

drivers/wifi/simplelink/simplelink_sockets.c

@@ -9,7 +9,7 @@ LOG_MODULE_DECLARE(LOG_MODULE_NAME);
 
 #include <stdlib.h>
 #include <limits.h>
-#include <fcntl.h>
+#include <zephyr/posix/fcntl.h>
 
 #include <zephyr/kernel.h>
 /* Define sockaddr, etc, before simplelink.h */

include/zephyr/posix/fcntl.h

@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2018 Linaro Limited
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef ZEPHYR_POSIX_FCNTL_H_
+#define ZEPHYR_POSIX_FCNTL_H_
+
+#define O_CREAT    0x0200
+#define O_APPEND   0x0400
+#define O_EXCL     0x0800
+#define O_NONBLOCK 0x4000
+
+#define F_DUPFD 0
+#define F_GETFL 3
+#define F_SETFL 4
+
+int open(const char *name, int flags, ...);
+
+#endif /* ZEPHYR_POSIX_FCNTL_H_ */

include/zephyr/posix/sys/eventfd.h

@@ -11,7 +11,7 @@
 #include <zephyr/sys/fdtable.h>
 #include <sys/types.h>
 
-#include <fcntl.h>
+#include <zephyr/posix/fcntl.h>
 
 #ifdef __cplusplus
 extern "C" {

lib/libc/minimal/include/fcntl.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018 Linaro Limited
+ * Copyright (c) 2022 Meta
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -7,15 +7,10 @@
 #ifndef ZEPHYR_LIB_LIBC_MINIMAL_INCLUDE_FCNTL_H_
 #define ZEPHYR_LIB_LIBC_MINIMAL_INCLUDE_FCNTL_H_
 
-#define O_CREAT    0x0200
-#define O_APPEND   0x0400
-#define O_EXCL     0x0800
-#define O_NONBLOCK 0x4000
-
-#define F_DUPFD 0
-#define F_GETFL 3
-#define F_SETFL 4
-
-int open(const char *name, int flags, ...);
+#ifndef CONFIG_POSIX_API
+#pragma message("#include <fcntl.h> without CONFIG_POSIX_API is deprecated. "                      \
+		"Please use CONFIG_POSIX_API or #include <zephyr/posix/fcntl.h>")
+#endif
+#include <zephyr/posix/fcntl.h>
 
 #endif /* ZEPHYR_LIB_LIBC_MINIMAL_INCLUDE_SYS_FCNTL_H_ */

lib/posix/fs.c

@@ -12,7 +12,7 @@
 #include <string.h>
 #include <zephyr/sys/fdtable.h>
 #include <zephyr/posix/sys/stat.h>
-#include <fcntl.h>
+#include <zephyr/posix/fcntl.h>
 #include <zephyr/fs/fs.h>
 
 BUILD_ASSERT(PATH_MAX >= MAX_FILE_NAME, "PATH_MAX is less than MAX_FILE_NAME");

tests/net/socket/socketpair/src/test_socketpair_block.c

@@ -4,7 +4,12 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+#ifdef CONFIG_ARCH_POSIX
 #include <fcntl.h>
+#else
+#include <zephyr/posix/fcntl.h>
+#endif
+
 #include <string.h>
 
 #include <zephyr/logging/log.h>

tests/net/socket/socketpair/src/test_socketpair_closed_ends.c

@@ -2,7 +2,11 @@
  *
  * Copyright (c) 2020 Friedt Professional Engineering Services, Inc
  */
+#ifdef CONFIG_ARCH_POSIX
 #include <fcntl.h>
+#else
+#include <zephyr/posix/fcntl.h>
+#endif
 
 #include <zephyr/logging/log.h>
 LOG_MODULE_DECLARE(net_test, CONFIG_NET_SOCKETS_LOG_LEVEL);

tests/net/socket/socketpair/src/test_socketpair_expected_failures.c

@@ -4,7 +4,11 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+#ifdef CONFIG_ARCH_POSIX
 #include <fcntl.h>
+#else
+#include <zephyr/posix/fcntl.h>
+#endif
 
 #include <zephyr/logging/log.h>
 LOG_MODULE_DECLARE(net_test, CONFIG_NET_SOCKETS_LOG_LEVEL);

tests/net/socket/socketpair/src/test_socketpair_fcntl.c

@@ -4,7 +4,11 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+#ifdef CONFIG_ARCH_POSIX
 #include <fcntl.h>
+#else
+#include <zephyr/posix/fcntl.h>
+#endif
 
 #include <zephyr/logging/log.h>
 LOG_MODULE_DECLARE(net_test, CONFIG_NET_SOCKETS_LOG_LEVEL);

tests/net/socket/socketpair/src/test_socketpair_happy_path.c

@@ -4,7 +4,11 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+#ifdef CONFIG_ARCH_POSIX
 #include <fcntl.h>
+#else
+#include <zephyr/posix/fcntl.h>
+#endif
 
 #include <zephyr/logging/log.h>
 LOG_MODULE_DECLARE(net_test, CONFIG_NET_SOCKETS_LOG_LEVEL);

tests/net/socket/socketpair/src/test_socketpair_nonblock.c

@@ -4,7 +4,11 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+#ifdef CONFIG_ARCH_POSIX
 #include <fcntl.h>
+#else
+#include <zephyr/posix/fcntl.h>
+#endif
 
 #include <zephyr/logging/log.h>
 LOG_MODULE_DECLARE(net_test, CONFIG_NET_SOCKETS_LOG_LEVEL);

tests/net/socket/socketpair/src/test_socketpair_poll.c

@@ -4,7 +4,12 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+#ifdef CONFIG_ARCH_POSIX
 #include <fcntl.h>
+#else
+#include <zephyr/posix/fcntl.h>
+#endif
+
 #include <string.h>
 
 #include <zephyr/logging/log.h>

tests/net/socket/socketpair/src/test_socketpair_unsupported_calls.c

@@ -4,7 +4,11 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+#ifdef CONFIG_ARCH_POSIX
 #include <fcntl.h>
+#else
+#include <zephyr/posix/fcntl.h>
+#endif
 
 #include <zephyr/logging/log.h>
 LOG_MODULE_DECLARE(net_test, CONFIG_NET_SOCKETS_LOG_LEVEL);