有没有办法在 systemd 单元中使用通配符、重定向或其他 shell 语法？

Question

我有一个 systemd 文件来启动一个 jar 文件。但我想将 jar 文件作为*.jar. 有没有办法做到这一点？

[Unit]
Description=Test Background

[Service]
ExecStart=/usr/bin/java -jar /var/www/test.com/*.jar
Type=simple
WorkingDirectory=/var/www/test.com

[Install]
WantedBy=multi-user.target

我试过这个但没有用。

Answer 1

来自man 5 systemd.service（“命令行”部分）：

This syntax is inspired by shell syntax, but only the meta-characters and expansions
described in the following paragraphs are understood, and the expansion of variables is
different. Specifically, redirection using "<", "<<", ">", and ">>", pipes using "|",
running programs in the background using "&", and other elements of shell syntax are not
supported.

和：

Note that shell command lines are not directly supported. If shell command lines are to be
used, they need to be passed explicitly to a shell implementation of some kind. Example:

   ExecStart=/bin/sh -c 'dmesg | tac'

通配符没有被提及为受支持，因此您必须在上面的示例中/bin/sh -c或/bin/bash -c类似地包装该命令。