GNU 屏幕：从 bash 脚本启动时 -S 选项不起作用

发布于 2024-12-08 21:47:11 字数 663 浏览 1 评论 0原文

拥有如此简单的 bash 脚本：

/bin/bash
screen -dm -S "backup"
wget -O backup-$(date +%Y-%m-%d).txt http://link-to-very-huge-file/

问题是：当执行 screen -dm -S "backup" 时，会出现新的 screen 会话。但它没有命名！当我（从 ssh）执行 screen -ls 时，它给了我：

(10/09/2011 04:35:05 PM)（已分离）
1969.VNC (10/09/2011 01:53:45 PM)（分离）
910.minecraft (10/09/2011 12:59:29 PM)（分离）

最后两个是我自己创建的。但是第一个是由 bash 脚本创建的，没有名称，甚至没有 id！

当我自己执行 screen -dm -S "backup" 时，它工作正常并为我提供了命名的屏幕会话：

3527.backup (10/09/2011 04:44:40 PM)（已分离）

但为什么脚本效果不好呢？怎样才能让它正常工作呢？

原文

Having such simple bash script:

/bin/bash
screen -dm -S "backup"
wget -O backup-$(date +%Y-%m-%d).txt http://link-to-very-huge-file/

The problem is: when screen -dm -S "backup" executes, new screen session appears. But it's not named! When I (from ssh) do screen -ls it gives me:

(10/09/2011 04:35:05 PM)        (Detached)
1969.VNC        (10/09/2011 01:53:45 PM)        (Detached)
910.minecraft   (10/09/2011 12:59:29 PM)        (Detached)

I've created the last two myself. But the first one, created by bash script, doesn't have name and even doesn't have id!

When I do screen -dm -S "backup" myself, it works fine and gives me the named screen session:

3527.backup (10/09/2011 04:44:40 PM)        (Detached)

But why script does bad? How to make it work propertly?

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

一直在等你来 2024-12-15 21:47:11

这很奇怪；它对我有用。

您可以复制并粘贴 bash 脚本的准确内容吗？您问题中的第一行缺少 #!，并且在 screen 命令后面的一行上有 wget 命令。这让我怀疑问题出在您没有向我们展示的某些代码中。

这是我刚刚尝试过的。（我添加了 -c /dev/null 以避免加载相当复杂的 .screenrc 文件）：

$ screen -ls
There is a screen on:
        2454.pts-1.kvetch       (09/09/2011 11:00:03 AM)        (Detached)
1 Socket in /var/run/screen/S-kst.

$ cat foo.bash
#!/bin/bash

screen -dm -S FROM_BASH -c /dev/null sleep 12345
$ ./foo.bash
$ screen -ls
There are screens on:
        10384.FROM_BASH (10/09/2011 01:22:48 PM)        (Detached)
        2454.pts-1.kvetch       (09/09/2011 11:00:03 AM)        (Detached)
2 Sockets in /var/run/screen/S-kst.

$

我在 Ubuntu 11.04 上使用 screen 4.00.03jw4。

That's odd; it works for me.

Can you copy-and-paste the exact contents of the bash script? The one in your question is missing the #! on the first line, and has the wget command on a line following the screen command. This makes me suspect the problem is in some code you haven't shown us.

Here's what I just tried. (I added the -c /dev/null to avoid loading my fairly elaborate .screenrc file):

$ screen -ls
There is a screen on:
        2454.pts-1.kvetch       (09/09/2011 11:00:03 AM)        (Detached)
1 Socket in /var/run/screen/S-kst.

$ cat foo.bash
#!/bin/bash

screen -dm -S FROM_BASH -c /dev/null sleep 12345
$ ./foo.bash
$ screen -ls
There are screens on:
        10384.FROM_BASH (10/09/2011 01:22:48 PM)        (Detached)
        2454.pts-1.kvetch       (09/09/2011 11:00:03 AM)        (Detached)
2 Sockets in /var/run/screen/S-kst.

$

I'm using screen 4.00.03jw4 on Ubuntu 11.04.

回复收藏 0 原文

~没有更多了~