Previously linenoiseProbe would accept any 4 byte response, even one
that isn't expected. This adds a check that the first byte of the
response is ESC.
Suggested in https://github.com/espressif/esp-idf/issues/8839.
Console example doesn't duplicate code in `console` component.
Linenoise has been improved: it now has a parametrized command line
length. It is now possible to paste data efficiently to the console.
Note: this can only be done if the cursor is at the end of the line.
Closes https://github.com/espressif/esp-idf/issues/7057
Fixes a regression from 753a92952: if cb was negative, read_bytes
overflowed, because the type was changed from int to size_t.
Also fixes incorrect timeout calculation: timeout_ms was 200, but
each iteration delayed for 10ms, and reduced timeout_ms by 1. This
made the effective timeout to be 2000ms.
Calloc function tries to allocate 4096 bytes.
If such memory is not available, it returns NULL pointer.
This exception was not handled in the code, causing a dirty crash.
A 0 length string is still a valid input and should be treated as such, a NULL return should be reserved for when errors occur during line editing or EOF is reached.
Merges https://github.com/espressif/esp-idf/pull/4926
morris