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Auto-saving does not normally save in the files that you visited, because it can be very undesirable to save a program that is in an inconsistent state when you have made half of a planned change. Instead, auto-saving is done in a different file called the auto-save file, and the visited file is changed only when you request saving explicitly (such as with C-x C-s).
Normally, the auto-save file name is made by appending ‘#’ to the front
and rear of the visited file name. Thus, a buffer visiting file
‘foo.c’ is auto-saved in a file ‘#foo.c#’. Most buffers that are
not visiting files are auto-saved only if you request it explicitly; when
they are auto-saved, the auto-save file name is made by appending ‘#’
to the front and rear of buffer name, then adding digits and letters at the
end for uniqueness. For example, the ‘*mail*’ buffer in which you
compose messages to be sent might be auto-saved in a file named
‘#*mail*#704juu’. Auto-save file names are made this way unless you
reprogram parts of Emacs to do something different (the functions
make-auto-save-file-name and auto-save-file-name-p). The file
name to be used for auto-saving in a buffer is calculated when auto-saving
is turned on in that buffer.
The variable auto-save-file-name-transforms allows a degree of
control over the auto-save file name. It lets you specify a series of
regular expressions and replacements to transform the auto save file name.
The default value puts the auto-save files for remote files (voir la section Remote Files) into the temporary file directory on the local machine.
When you delete a substantial part of the text in a large buffer, auto save turns off temporarily in that buffer. This is because if you deleted the text unintentionally, you might find the auto-save file more useful if it contains the deleted text. To reenable auto-saving after this happens, save the buffer with C-x C-s, or use C-u 1 M-x auto-save-mode.
If you want auto-saving to be done in the visited file rather than in a
separate auto-save file, set the variable auto-save-visited-file-name
to a non-nil value. In this mode, there is no real difference
between auto-saving and explicit saving.
A buffer's auto-save file is deleted when you save the buffer in its visited
file. (You can inhibit this by setting the variable
delete-auto-save-files to nil.) Changing the visited file
name with C-x C-w or set-visited-file-name renames any
auto-save file to go with the new visited name.
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Ce document a été généré par Eric Reinbold le 23 Février 2009 en utilisant texi2html 1.78.