posix: include: dirent: rework the dirent.h header

Declare standard functions and split type definitions into
sys/dirent.h .

Signed-off-by: Chris Friedt <[email protected]>

Author: cfriedt

include/zephyr/posix/dirent.h

@@ -1,40 +1,46 @@
 /*
  * Copyright (c) 2018 Intel Corporation
+ * Copyright (c) 2024 Tenstorrent AI ULC
  *
  * SPDX-License-Identifier: Apache-2.0
  */
+
 #ifndef ZEPHYR_INCLUDE_POSIX_DIRENT_H_
 #define ZEPHYR_INCLUDE_POSIX_DIRENT_H_
 
-#include <limits.h>
-
-#include <zephyr/posix/posix_types.h>
-
-#ifdef CONFIG_POSIX_FILE_SYSTEM
-#include <zephyr/fs/fs.h>
+#include <zephyr/posix/sys/dirent.h>
+#include <zephyr/toolchain.h>
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-typedef void DIR;
-
-struct dirent {
-	unsigned int d_ino;
-	char d_name[PATH_MAX + 1];
-};
-
-/* Directory related operations */
-DIR *opendir(const char *dirname);
+#if (_POSIX_C_SOURCE >= 200809L) || (_XOPEN_SOURCE >= 700)
+int alphasort(const struct dirent **d1, const struct dirent **d2);
+#endif
 int closedir(DIR *dirp);
+#if (_POSIX_C_SOURCE >= 200809L) || (_XOPEN_SOURCE >= 700)
+int dirfd(DIR *dirp);
+#endif
+DIR *fdopendir(int fd);
+DIR *opendir(const char *dirname);
 struct dirent *readdir(DIR *dirp);
+#if (_POSIX_C_SOURCE >= 199506L) || (_XOPEN_SOURCE >= 500)
 int readdir_r(DIR *ZRESTRICT dirp, struct dirent *ZRESTRICT entry,
 	      struct dirent **ZRESTRICT result);
+#endif
+void rewinddir(DIR *dirp);
+#if (_POSIX_C_SOURCE >= 200809L) || (_XOPEN_SOURCE >= 700)
+int scandir(const char *dir, struct dirent ***namelist, int (*sel)(const struct dirent *),
+	    int (*compar)(const struct dirent **, const struct dirent **));
+#endif
+#if defined(_XOPEN_SOURCE)
+void seekdir(DIR *dirp, long loc);
+long telldir(DIR *dirp);
+#endif
 
 #ifdef __cplusplus
 }
 #endif
 
-#endif /* CONFIG_POSIX_FILE_SYSTEM */
-
-#endif	/* ZEPHYR_INCLUDE_POSIX_DIRENT_H_ */
+#endif /* ZEPHYR_INCLUDE_POSIX_DIRENT_H_ */

include/zephyr/posix/sys/dirent.h

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2024 Tenstorrent AI ULC
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef ZEPHYR_INCLUDE_POSIX_SYS_DIRENT_H_
+#define ZEPHYR_INCLUDE_POSIX_SYS_DIRENT_H_
+
+#include <limits.h>
+
+#include <zephyr/posix/posix_features.h>
+
+#if !defined(NAME_MAX) && defined(_XOPEN_SOURCE)
+#define NAME_MAX _XOPEN_NAME_MAX
+#endif
+
+#if !defined(NAME_MAX) && defined(_POSIX_C_SOURCE)
+#define NAME_MAX _POSIX_NAME_MAX
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef void DIR;
+
+struct dirent {
+	unsigned int d_ino;
+	char d_name[NAME_MAX + 1];
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ZEPHYR_INCLUDE_POSIX_SYS_DIRENT_H_ */

lib/posix/options/file_system_r.c

@@ -7,11 +7,9 @@
 #include "fs_priv.h"
 
 #include <errno.h>
-#include <limits.h>
 #include <string.h>
 
 #include <zephyr/fs/fs.h>
-#include <zephyr/posix/posix_features.h>
 #include <zephyr/posix/dirent.h>
 #include <zephyr/sys/util.h>