gdb: Prompting
28.3 Annotation for GDB Input
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When GDB prompts for input, it annotates this fact so it is possible to
know when to send output, when the output from a given command is over,
etc.
Different kinds of input each have a different "input type". Each
input type has three annotations: a 'pre-' annotation, which denotes the
beginning of any prompt which is being output, a plain annotation, which
denotes the end of the prompt, and then a 'post-' annotation which
denotes the end of any echo which may (or may not) be associated with
the input. For example, the 'prompt' input type features the following
annotations:
^Z^Zpre-prompt
^Z^Zprompt
^Z^Zpost-prompt
The input types are
'prompt'
When GDB is prompting for a command (the main GDB prompt).
'commands'
When GDB prompts for a set of commands, like in the 'commands'
command. The annotations are repeated for each command which is
input.
'overload-choice'
When GDB wants the user to select between various overloaded
functions.
'query'
When GDB wants the user to confirm a potentially dangerous
operation.
'prompt-for-continue'
When GDB is asking the user to press return to continue. Note:
Don't expect this to work well; instead use 'set height 0' to
disable prompting. This is because the counting of lines is buggy
in the presence of annotations.