我想将一个进程放入后台,然后多次将数据传递给它。例如:
cat & # The command I want to write into
cat_pid=$! # Getting the process id of the cat process
echo hello | $cat_pid # This line won't work, but shows what I want to
# do: write into the stdin of the cat process
所以我有PID,如何写入该过程?我愿意以不同的方式启动cat进程。
另外,我在Mac上,所以我无法使用/proc
:(
答案 0 :(得分:3)
首先,创建一个管道:
$ mkfifo pipe
其次,使用管道输入启动cat进程:
$ cat <pipe &
[1] 4997
现在,将数据发送到管道:
$ echo "this is a test" >pipe
$ this is a test
答案 1 :(得分:2)
mkfifo .pipe
cat < .pipe &
echo hello > .pipe