我可以在 Perl 的反引号中执行多行命令吗? [英] Can I execute a multiline command in Perl's backticks?
问题描述
在 Unix 中,我有一个要使用 nohup 运行的进程.但是,此过程将在某个时候等待提示,我必须输入 yes
或 no
才能继续.到目前为止,在 Unix 中我一直在做以下事情
In Unix, I have a process that I want to run using nohup. However this process will at some point wait at a prompt where I have to enter yes
or no
for it to continue. So far, in Unix I have been doing the following
nohup myprocess <<EOF
y
EOF
所以我使用 nohup 启动进程 'myprocess',并在一个带有 'y' 的文件中使用管道,然后关闭该文件.上面的几行实际上是三个单独的命令 - 即我在 UNIX 的第一行按 Enter,然后我得到一个提示,我输入y",然后按 Enter,最后输入EOF"并再次按回车.
So I start the process 'myprocess' using nohup and pipe in a file with 'y' then close the file. The lines above are effectively three seperate commands - i.e. I hit enter on the first line in UNIX, then I get a prompt where I enter 'y' and then press enter to then finally type 'EOF' and hit return again.
我想知道在 Perl 中执行此命令,但我不确定如何执行此命令,因为它超过三行.我不知道以下是否有效....
I want to know execute this in Perl but I am not sure how I can execute this command as it is over three lines. I don't know if the following will work....
my $startprocess = `nohup myprocess <<EOF &
y
EOF
`
请帮忙 - 谢谢!
推荐答案
我认为您的建议会按原样进行.如果没有,请尝试用管道替换重定向:
I think your proposal will work as is. If not, try replacing the redirect with a pipe:
my $startprocess = `(echo "y" | nohup myprocess) &`;
此外,根据您为什么要执行 nohup
,请查看以下使用 Proc::Daemon
的纯 Perl 守护程序方法:如何在 linux 中将 Perl 脚本作为系统守护进程运行?
Also, depending on WHY you are doing a nohup
, please look at the following pure Perl daemonizing approach using Proc::Daemon
: How can I run a Perl script as a system daemon in linux?
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