[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] | Reference for unit 'System' (#rtl)

# FileNameCaseSensitive

OS treatment of filenames is case sensitive.

## Declaration

Source position: sysunixh.inc line 52

`const FileNameCaseSensitive: Boolean = True;`

## Description

FileNameCaseSensitive is True if case is important when using filenames on the current OS. In this case, the OS will treat files with different cased names as different files. Note that this may depend on the file system: Unix operating systems that access a DOS or Windows partition will have this constant set to true, but when writing to the DOS partition, the casing is ignored.

This constant is part of a set of constants that describe the OS characteristics. These constants should be used instead of hardcoding OS characteristics.

## See also

DriveSeparator |  | Character used to separate directory parts.
DirectorySeparator |  | Character used to separate directory parts.
LineEnding |  | Constant describing the current line ending character.
LFNSupport |  | Constant describing support for long filenames.
FileNameCasePreserving |  | OS preserves case in filenames when creating or renaming entries.
PathSeparator |  | Character used to separate paths in a search list
DefaultTextLineBreakStyle |  | Default line ending style.