After a fresh install of A/UX 3.1 (from the full installer CD, not the Upgrade), /etc/fstab is an AppleDouble file, typed 'TEXT', creator 'iAUX', the A/UX Installer's signature. Since the creator is not 'A/UX' or 'tefi' and the Finder cannot find the Installer application, the icon for /etc/fstab is the unknown (grey) text document. The system behaves correctly as long as /etc/fstab remains an AppleDouble file.
If /etc/fstab is then edited and saved with TeachText, TextEditor or any other Macintosh application, the A/UX file manager will convert it to AppleSingle format, which is not understood by fsck. This occurs because the "TBTRANSLATEUXONLY" environment variable is set (the default), and 'iAUX' is not a creator for which the file manager handles TEXT files specially which are 'DOS ', 'tefi', 'TextEditor', and 'A/UX'.
The problem is not with TextEditor, but with the A/UX file manager's handling of the TEXT file type and creator. This behavior was introduced in A/UX 3.1.
Workaround:
1) Open /etc/fstab with TextEditor (don't use TeachText).
2) Select and copy the contents of /etc/fstab into the cut-and-paste
buffer (Command-C).
3) Open a new TextEditor document (Command-N) with a unique name (not
fstab); be sure that the "Save Text Only" button is set in the dialog
box (this is the default).
4) Paste the contents of /etc/fstab into the new document.
5) Save the new document and quit TextEditor.
6) From the Finder, drag /etc/fstab to the Trash and empty the Trash.
7) Rename the new document to /etc/fstab.
It won't work to just do a "Save As..."; TextEditor will preserve the incorrect file creator, 'iAUX'.
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