在 bash 中通过 scp 和 chmod 使用带空格的文件名

发布于 2024-08-23 19:18:20 字数 452 浏览 13 评论 0原文

我喜欢定期将文件放在网络服务器的 /tmp 目录中以进行共享。令人烦恼的是，每当我 scp 文件时，我都必须设置权限。按照另一个问题的建议，我编写了一个复制文件的脚本结束，设置权限，然后打印 URL：

#!/bin/bash

scp "$1" SERVER:"/var/www/tmp/$1"
ssh SERVER chmod 644 "/var/www/tmp/$1"
echo "URL is: http://SERVER/tmp/$1"

当我用实际主机替换 SERVER 时，一切都会按预期工作......直到我使用包含空格的参数执行脚本。虽然我怀疑解决方案可能是使用 $@ 我还没有弄清楚如何让空格文件名起作用。

原文

Periodically, I like to put files in the /tmp directory of my webserver to share out. What is annoying is that I must set the permissions whenever I scp the files. Following the advice from another question I've written a script which copies the file over, sets the permissions and then prints the URL:

#!/bin/bash

scp "$1" SERVER:"/var/www/tmp/$1"
ssh SERVER chmod 644 "/var/www/tmp/$1"
echo "URL is: http://SERVER/tmp/$1"

When I replace SERVER with my actual host, everything works as expected...until I execute the script with an argument including spaces. Although I suspect the solution might be to use $@ I've not yet figured out how to get a spaced filename to work.

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笙痞 2024-08-30 19:18:20

事实证明，我们需要的是转义将发送到远程服务器的路径。 Bash 认为 SERVER:"/var/www/tmp/$1" 中的引号与 $1 相关，并将它们从最终输出中删除。如果我尝试运行：

tmp-scp.sh Screen\ shot\ 2010-02-18\ at\ 9.38.35\ AM.png

Echoing 我们看到它正在尝试执行：

scp SERVER:/var/www/tmp/Screen shot 2010-02-18 at 9.38.35 AM.png

如果引号是转义文字，则 scp 命令看起来更像您所期望的：

scp SERVER:"/var/www/tmp/Screen shot 2010-02-18 at 9.38.35 AM.png"

通过添加一些代码来截断路径，最终脚本将变为：

#!/bin/bash

# strip path
filename=${1##*/}
fullpath="$1"

scp "$fullpath" SERVER:\"/var/www/tmp/"$filename"\"
echo SERVER:\"/var/www/tmp/"$filename"\"
ssh SERVER chmod 644 \"/var/www/tmp/"$filename"\"
echo "URL is: http://SERVER/tmp/$filename"

It turns out that what is needed is to escape the path which will be sent to the remote server. Bash thinks the quotes in SERVER:"/var/www/tmp/$1" are related to the $1 and removes them from the final output. If I try to run:

tmp-scp.sh Screen\ shot\ 2010-02-18\ at\ 9.38.35\ AM.png

Echoing we see it is trying to execute:

scp SERVER:/var/www/tmp/Screen shot 2010-02-18 at 9.38.35 AM.png

If instead the quotes are escaped literals then the scp command looks more like you'd expect:

scp SERVER:"/var/www/tmp/Screen shot 2010-02-18 at 9.38.35 AM.png"

With the addition of some code to truncate the path the final script becomes:

#!/bin/bash

# strip path
filename=${1##*/}
fullpath="$1"

scp "$fullpath" SERVER:\"/var/www/tmp/"$filename"\"
echo SERVER:\"/var/www/tmp/"$filename"\"
ssh SERVER chmod 644 \"/var/www/tmp/"$filename"\"
echo "URL is: http://SERVER/tmp/$filename"

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