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The WriteMode( archive, mode) calling sequence displays or modifies read-write mode of a library specified in archive. For more details on library read-write mode, see march .

If archive is a directory, the read-write modes of all the libraries in that directory are displayed. Otherwise, if archive is a file that is a Maple library (has the extension .lib or .mla), only the read-write mode of that library is displayed. An error is raised if the path specified by archive does not exist.

The optional mode specifies the new read-write mode to be assigned to the library and the new mode is displayed. When mode is not given, the read-write mode of the library is displayed but remains unchanged.

$\mathrm{with}\left(\mathrm{LibraryTools}\right)\:$

$\mathrm{LibLocation}≔\mathrm{cat}\left(\mathrm{kernelopts}\left(\mathrm{mapledir}\right)\,''/lib/myLib.mla''\right)$

$\mathrm{Create}\left(\mathrm{LibLocation}\right)$

$\mathrm{WriteMode}\left(\mathrm{LibLocation}\right)$

$\mathrm{WriteMode}\left(\mathrm{LibLocation}\,''READONLY''\right)$