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dmage avatar dmage commented on July 17, 2024 1

Из документации по grep:

By default, output is line buffered when standard output is a terminal and block buffered otherwise.

Желаемого поведения можно добиться такой командой:

./co2mond/co2mond | grep --line-buffered CntR | head -n 1

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Speakus avatar Speakus commented on July 17, 2024

хм... интересно что команда ./co2mond/co2mond | grep CntR | cat тоже не срабатывает, хотя ./co2mond/co2mond | grep CntR нормально срабатывает...

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Speakus avatar Speakus commented on July 17, 2024

О, спасибо! Только, конечно, такая команда подвисает пока не получит следующее значение CntR - но всё равно лучше чем ничего.

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dmage avatar dmage commented on July 17, 2024

Устройство не позволяет запросить данные, можно только слушать новые значения. Если хочется мгновенно получать текущие значения, то можно запустить co2mond как демона и текущие значения читать из файлов.

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Speakus avatar Speakus commented on July 17, 2024

Спасибо за разъяснения.

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