将 bash 脚本转换为 busybox 脚本
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Turning a bash script into a busybox script
提问by relima
I am working on a device that only has busybox (ash?) and does not support bash. However, I need to run the bash script below on it. Is it possible or busybox simply does not support scripts?
我正在使用只有busybox（ash？）并且不支持bash的设备。但是，我需要在其上运行下面的 bash 脚本。有可能还是busybox根本不支持脚本？
#!/bin/bash
domain="mydomain.com"
record="11019653"
api_key="key1234"
ip="$(curl http://ipecho.net/plain)"
echo content="$(curl \
-k \
-H "Authorization: Bearer $api_key" \
-H "Content-Type: application/json" \
-d '{"data": "'"$ip"'"}' \
-X PUT "https://api.digitalocean.com/v2/domains/$domain/records/$record")"
回答by
There is no issue in your script that could break in ash.
您的脚本中没有可能会在灰烬中中断的问题。
Well, except that you are doing echo content="....". That will print in the output the word content=joined to the output of the command in quotes.
好吧，除了你正在做的echo content="...."。这将在输出中打印content=在引号中连接到命令输出的单词。
If you want to set the value of a variable and then print it, do:
如果要设置变量的值然后打印它，请执行以下操作：
#!/bin/ash
domain="mydomain.com"
record="11019653"
api_key="key1234"
ip="$(curl http://ipecho.net/plain)"
content="$(curl \
-k \
-H "Authorization: Bearer $api_key" \
-H "Content-Type: application/json" \
-d '{"data": "'"$ip"'"}' \
-X PUT "https://api.digitalocean.com/v2/domains/$domain/record/$record")"
echo "$content"
The program busybox will act as a shell if linked with the name ash:
如果与名称 ash 链接，则程序 busybox 将充当 shell：
ln -s /bin/busybox /bin/ash
Even in your present directory (or a test one):
即使在您当前的目录（或测试目录）中：
ln -s /bin/busybox ash
Then, you could start it by typing ./ashif in the PWD, or ashif in a PATH directory. You could test commands and scripts from it if you wish, or use bash as your shell and start scripts with ash script.shor (better) ./script.shif the she-bang of the file is #!/bin/ash
然后，您可以通过./ash在 PWD 或ashPATH 目录中键入if来启动它。如果您愿意，您可以从中测试命令和脚本，或者使用 bash 作为您的 shell 并使用ash script.sh或（更好）启动脚本，./script.sh如果文件的 she-bang 是#!/bin/ash
