Bash，执行命令但继续交互式会话

I want to create an alias for pagsh that will immediately get me the admin kerberos ticket.

我想为pagsh创建一个别名，它会立即获得admin kerberos票证。

The problem is that I can't figure out how to specify a command for the bash to run, but still continue with the interactive session after the command is done.

问题是我无法弄清楚如何指定bash运行的命令，但在命令完成后仍然继续交互式会话。

My current shot is:

我目前的镜头是：

alias admin=pagsh -c "bash -c \"kinit [e-mail]\""

but bash logically ends right after kinit is done. How can I push a custom command into a begging of an interactive session of bash? I still need to run .bashrc normally, therefore I can't use --rcfile

但是bash逻辑上在kinit完成后立即结束。如何将自定义命令推送到bash的交互式会话中？我仍然需要正常运行.bashrc，因此我不能使用--rcfile

3 个解决方案

#1

My advice would be using a custom bashrc file with --rcfile that sources your .bashrc, ex :

我的建议是使用自定义的bashrc文件和--rcfile来源你的.bashrc，例如：

alias admin=pagsh -c "bash --rcfile myrc"

别名admin = pagsh -c“bash --rcfile myrc”

myrc :

myrc：

source ~/.bashrc
kinit [e-mail]

#2

If what you need is only a line or two, you can use the cool bash feature of "Process Substitution"[1] to provide it right on the invocation line. e.g. (to run a bash in a specific python virtualenv):

如果你需要的只是一行或两行，你可以使用“过程替换”[1]的酷bash功能在调用行上提供它。例如（在特定的python virtualenv中运行bash）：

bash --rcfile <(echo '. ./pyvenv/bin/activate')

multiple lines are not a problem, nor is using vars or helpers:

多行不是问题，也不是使用变量或帮助：

bash --rcfile <(echo echo "Starting at `date`"; echo cd $HOME)

[1] man bash and look for "Process Substitution". Note that this is not supported on all systems, but it should work on all Linux.

[1]男人猛击并寻找“过程替代”。请注意，并非所有系统都支持此功能，但它应适用于所有Linux。

#3

What about following?

怎么样？

alias admin='pagsh -c "bash -c \"kinit [e-mail]; exec bash\""'

or even

甚至

alias admin='pagsh -c "kinit [e-mail]; exec bash"'

might work. (I do not have working openafs environment around to test it properly.)

可能有用。 （我没有工作的openafs环境来正确测试它。）