Get current error mode

Question

How can one get the current error mode. e.g., is batchmode, scrollmode, etc set? I would like to save and restore these modes in lua or be able to have a macro save the current state that can be called later to restore it.

e.g., \savemode and \restoremode

Related: http://tex.stackexchange.com/questions/91592/where-to-find-official-and-extended-documentation-for-tex-latexs-commandlin where you also find how to do the thing you want. — egreg, Feb 25 '17 at 23:22
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score 4 · Answer 1 · answered Feb 25 '17 at 23:19

etex added \interactionmode.

When used as number, \interactionmode returns one of the values 0 (batchmode), 1 (nonstopmode), 2 (scrollmode), or 3 (errorstopmode). Assigning one of these values to \interactionmode changes the current interaction mode accordingly; such assignments are always global.

Node that last part: "such assignments are always global".

Get current error mode

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