ここ以前見たことのないシェル入力構造を見つけましたが、うまくいきました。それは言う
comm <(fancy input mangling) <(another input construction)
これは通常のstdin / stdout / stderrプログラムでどのように機能し、プログラムは最初の入力ファイルと2番目の入力ファイルをどのように区別しますか?
答え1
man
あなたの友達ですgrep
。
$ man bash | grep -C2 '<('
Process Substitution
Process substitution is supported on systems that support named pipes (FIFOs) or the /dev/fd method of naming open files. It
takes the form of <(list) or >(list). The process list is run with its input or output connected to a FIFO or some file in
/dev/fd. The name of this file is passed as an argument to the current command as the result of the expansion. If the >(list)
form is used, writing to the file will provide input for list. If the <(list) form is used, the file passed as an argument
should be read to obtain the output of list.