dev*_*ull 36
引用man ps:
Here are the different values that the s, stat and state output
specifiers (header "STAT" or "S") will display to describe the state of
a process.
...
+ is in the foreground process group
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所以你可以执行一个简单的检查:
case $(ps -o stat= -p $$) in
*+*) echo "Running in foreground" ;;
*) echo "Running in background" ;;
esac
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