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https://github.com/uutils/coreutils
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24 lines
306 B
Bash
24 lines
306 B
Bash
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#!/bin/bash
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if [ -t 0 ] ; then
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echo "stdin is atty"
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else
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echo "stdin is not atty"
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fi
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if [ -t 1 ] ; then
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echo "stdout is atty"
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else
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echo "stdout is not atty"
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fi
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if [ -t 2 ] ; then
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echo "stderr is atty"
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else
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echo "stderr is not atty"
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fi
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>&2 echo "This is an error message."
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true
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