| mapping | Description |
|---|---|
| cp437 | DOS Latin US |
| cp850 | DOS Latin-1 |
| cp852 | DOS Latin-2 |
| cp866 | DOS Cyrillic |
| cp1250 | Windows Latin 2 |
| cp1251 | Windows Cyrillic |
| cp1252 | Windows Latin 1 |
- all — make all files executable.
- auto — make files ending in .exe, .bat, and .com executable.
- none — make no files executable.
- system — use the DOS “system” attribute to indicate which files are executable.
The default is auto.
The value must be one of the following:
- always — always read the entire FAT at mount time
- lazy — read the FAT only when required (statvfs() query)
- nonrmv — act as always for nonremovable media, and lazy for removable media
The default is nonrmv.
- ignore — ignore the record.
- lazy — update the record only when unmounting.
- update — update it whenever the FAT is modified.
- use — update it and use it (normally the free block count is calculated at mounting).
The default is lazy.
- dot — show hidden files in the filesystem with a dot (.) prefixed to their names. Files created with a leading dot have the DOS “hidden” attribute set.
- ignore — ignore hidden files; the files don't appear in the filesystem.
- show — show hidden files in the filesystem as normal files.
The default is show.
- always — show long filenames. Always create both short and long filenames.
- ignore — ignore long filenames. Only 8.3 filenames are displayed or created.
- show — show long filenames. Long filenames are created if the filename is longer than 8.3 or if mixed case is used.
The default is show.
- ignore — place no special meaning on these files (the default).
- all — turn all shortcut files into symbolic links pointing to their shortcut targets.
- local — turn into symbolic links only those shortcut files that point to targets within this filesystem.
- emulate — provide the following features beyond those provided by FAT:
- Create the . and .. entries in the root directory.
- Calculate directory size.
- Calculate the number of links per directory, based on the subdirectories.
- Ignore modification attempts that cannot be stored on disk or recreated by emulation, but don't raise errors.
- none — disable POSIX checks and emulation:
- There are no . and .. entries in the root directory.
- The link count of every directory is always 2.
- strict — set stricter POSIX checks. Provide the same features listed under
emulate mode, but flag as errors modification attempts that cannot
be stored on disk or recreated by emulation. For example, an error of EINVAL
is flagged for attempts to do any of the following:
- Set the userid or group ID to something other than the default.
- Remove an r permission.
- Set an s permission.
- Set a file modification or access time to pre-1980.
The default is emulate.
- lower — always user lowercase (file.c).
- upper — always use uppercase (FILE.C).
- windows — emulate WindowsNT and use all lowercase or all uppercase according to the attributes of each filename (e.g., file.c or FILE.C).
The default is lower.
 |
Because getsubopt() interprets commas as separators between suboptions, you can specify only one symbolic mode at a time (e.g., u=rw, not u=rw,go=r). To work around this, specify more than one umask option (e.g., umask=u=rw umask=go=r). |
- equals — display the volume label as a name-special file with an = prefixed to its name.
- ignore — don't display the volume label.
- show — display the volume label as a name-special file.
The default is equals.