1 files changed, 26 insertions, 3 deletions

diff --git a/drivers/unix/dir_access_unix.cpp b/drivers/unix/dir_access_unix.cpp
index a162f46103..46efb45934 100644
--- a/drivers/unix/dir_access_unix.cpp
+++ b/drivers/unix/dir_access_unix.cpp
@@ -38,9 +38,11 @@
 #include "core/templates/list.h"
 
 #include <errno.h>
+#include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/ioctl.h>
 #include <sys/statvfs.h>
 
 #ifdef HAVE_MNTENT
@@ -339,7 +341,7 @@ Error DirAccessUnix::change_dir(String p_dir) {
 	// prev_dir is the directory we are changing out of
 	String prev_dir;
 	char real_current_dir_name[2048];
-	ERR_FAIL_COND_V(getcwd(real_current_dir_name, 2048) == nullptr, ERR_BUG);
+	ERR_FAIL_NULL_V(getcwd(real_current_dir_name, 2048), ERR_BUG);
 	if (prev_dir.parse_utf8(real_current_dir_name) != OK) {
 		prev_dir = real_current_dir_name; //no utf8, maybe latin?
 	}
@@ -361,7 +363,7 @@ Error DirAccessUnix::change_dir(String p_dir) {
 
 	String base = _get_root_path();
 	if (!base.is_empty() && !try_dir.begins_with(base)) {
-		ERR_FAIL_COND_V(getcwd(real_current_dir_name, 2048) == nullptr, ERR_BUG);
+		ERR_FAIL_NULL_V(getcwd(real_current_dir_name, 2048), ERR_BUG);
 		String new_dir;
 		new_dir.parse_utf8(real_current_dir_name);
 
@@ -488,6 +490,27 @@ bool DirAccessUnix::is_hidden(const String &p_name) {
 	return p_name != "." && p_name != ".." && p_name.begins_with(".");
 }
 
+bool DirAccessUnix::is_case_sensitive(const String &p_path) const {
+#if defined(LINUXBSD_ENABLED)
+	String f = p_path;
+	if (!f.is_absolute_path()) {
+		f = get_current_dir().path_join(f);
+	}
+	f = fix_path(f);
+
+	int fd = ::open(f.utf8().get_data(), O_RDONLY | O_NONBLOCK);
+	if (fd) {
+		long flags = 0;
+		if (ioctl(fd, _IOR('f', 1, long), &flags) >= 0) {
+			::close(fd);
+			return !(flags & 0x40000000 /* FS_CASEFOLD_FL */);
+		}
+		::close(fd);
+	}
+#endif
+	return true;
+}
+
 DirAccessUnix::DirAccessUnix() {
 	dir_stream = nullptr;
 	_cisdir = false;
@@ -496,7 +519,7 @@ DirAccessUnix::DirAccessUnix() {
 
 	// set current directory to an absolute path of the current directory
 	char real_current_dir_name[2048];
-	ERR_FAIL_COND(getcwd(real_current_dir_name, 2048) == nullptr);
+	ERR_FAIL_NULL(getcwd(real_current_dir_name, 2048));
 	if (current_dir.parse_utf8(real_current_dir_name) != OK) {
 		current_dir = real_current_dir_name;
 	}