1 files changed, 62 insertions, 19 deletions

diff --git a/drivers/unix/file_access_unix.cpp b/drivers/unix/file_access_unix.cpp
index ca5a13799e..43ad0799ba 100644
--- a/drivers/unix/file_access_unix.cpp
+++ b/drivers/unix/file_access_unix.cpp
@@ -41,6 +41,11 @@
 #include <sys/types.h>
 #include <unistd.h>
 
+#if defined(TOOLS_ENABLED)
+#include <limits.h>
+#include <stdlib.h>
+#endif
+
 void FileAccessUnix::check_errors() const {
 	ERR_FAIL_NULL_MSG(f, "File must be opened before use.");
 
@@ -87,6 +92,22 @@ Error FileAccessUnix::open_internal(const String &p_path, int p_mode_flags) {
 		}
 	}
 
+#if defined(TOOLS_ENABLED)
+	if (p_mode_flags & READ) {
+		String real_path = get_real_path();
+		if (real_path != path) {
+			// Don't warn on symlinks, since they can be used to simply share addons on multiple projects.
+			if (real_path.to_lower() == path.to_lower()) {
+				// The File system is case insensitive, but other platforms can be sensitive to it
+				// To ease cross-platform development, we issue a warning if users try to access
+				// a file using the wrong case (which *works* on Windows and macOS, but won't on other
+				// platforms).
+				WARN_PRINT(vformat("Case mismatch opening requested file '%s', stored as '%s' in the filesystem. This file will not open when exported to other case-sensitive platforms.", path, real_path));
+			}
+		}
+	}
+#endif
+
 	if (is_backup_save_enabled() && (p_mode_flags == WRITE)) {
 		save_path = path;
 		// Create a temporary file in the same directory as the target file.
@@ -173,6 +194,26 @@ String FileAccessUnix::get_path_absolute() const {
 	return path;
 }
 
+#if defined(TOOLS_ENABLED)
+String FileAccessUnix::get_real_path() const {
+	char *resolved_path = ::realpath(path.utf8().get_data(), nullptr);
+
+	if (!resolved_path) {
+		return path;
+	}
+
+	String result;
+	Error parse_ok = result.parse_utf8(resolved_path);
+	::free(resolved_path);
+
+	if (parse_ok != OK) {
+		return path;
+	}
+
+	return result.simplify_path();
+}
+#endif
+
 void FileAccessUnix::seek(uint64_t p_position) {
 	ERR_FAIL_NULL_MSG(f, "File must be opened before use.");
 
@@ -218,22 +259,13 @@ bool FileAccessUnix::eof_reached() const {
 	return last_error == ERR_FILE_EOF;
 }
 
-uint8_t FileAccessUnix::get_8() const {
-	ERR_FAIL_NULL_V_MSG(f, 0, "File must be opened before use.");
-	uint8_t b;
-	if (fread(&b, 1, 1, f) == 0) {
-		check_errors();
-		b = '\0';
-	}
-	return b;
-}
-
 uint64_t FileAccessUnix::get_buffer(uint8_t *p_dst, uint64_t p_length) const {
-	ERR_FAIL_COND_V(!p_dst && p_length > 0, -1);
 	ERR_FAIL_NULL_V_MSG(f, -1, "File must be opened before use.");
+	ERR_FAIL_COND_V(!p_dst && p_length > 0, -1);
 
 	uint64_t read = fread(p_dst, 1, p_length, f);
 	check_errors();
+
 	return read;
 }
 
@@ -241,14 +273,26 @@ Error FileAccessUnix::get_error() const {
 	return last_error;
 }
 
-void FileAccessUnix::flush() {
-	ERR_FAIL_NULL_MSG(f, "File must be opened before use.");
-	fflush(f);
+Error FileAccessUnix::resize(int64_t p_length) {
+	ERR_FAIL_NULL_V_MSG(f, FAILED, "File must be opened before use.");
+	int res = ::ftruncate(fileno(f), p_length);
+	switch (res) {
+		case 0:
+			return OK;
+		case EBADF:
+			return ERR_FILE_CANT_OPEN;
+		case EFBIG:
+			return ERR_OUT_OF_MEMORY;
+		case EINVAL:
+			return ERR_INVALID_PARAMETER;
+		default:
+			return FAILED;
+	}
 }
 
-void FileAccessUnix::store_8(uint8_t p_dest) {
+void FileAccessUnix::flush() {
 	ERR_FAIL_NULL_MSG(f, "File must be opened before use.");
-	ERR_FAIL_COND(fwrite(&p_dest, 1, 1, f) != 1);
+	fflush(f);
 }
 
 void FileAccessUnix::store_buffer(const uint8_t *p_src, uint64_t p_length) {
@@ -291,7 +335,6 @@ uint64_t FileAccessUnix::_get_modified_time(const String &p_file) {
 	if (!err) {
 		return status.st_mtime;
 	} else {
-		print_verbose("Failed to get modified time for: " + p_file + "");
 		return 0;
 	}
 }
@@ -320,7 +363,7 @@ Error FileAccessUnix::_set_unix_permissions(const String &p_file, BitField<FileA
 }
 
 bool FileAccessUnix::_get_hidden_attribute(const String &p_file) {
-#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
+#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__APPLE__)
 	String file = fix_path(p_file);
 
 	struct stat st = {};
@@ -334,7 +377,7 @@ bool FileAccessUnix::_get_hidden_attribute(const String &p_file) {
 }
 
 Error FileAccessUnix::_set_hidden_attribute(const String &p_file, bool p_hidden) {
-#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
+#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__APPLE__)
 	String file = fix_path(p_file);
 
 	struct stat st = {};