cannium / myshell Goto Github PK

myshell
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Myshell is a simple but usable shell implementation, written by can.

If you encounter any problems while using it, please contact can[AT]canx.me


quick start
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to build, run:

	$ make

to use it, run:

	$ ./myshell

to quit the shell, run:

	$ exit


some details
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1. You can use "export name=value" to change environment variables, 
	to show them, use "echo name".
	Especially, you can use "export $PE=style" to change the prompt style.
	And the style supports 3 special characters:
		\u		current user
		\w		current working directory
		\h		host name of the computer
	For example, when setting:
		$ export $PE=\u@\h:\w>
	you will get a prompt like this:
		[email protected]:/Users/can/github/myShell>

2. You can add a "&" at the end of a command line,
	to make it run in the background. For example,
		$ ./test/while1 &
	But "&" can not appear in the middle of a command line, like:
		$ ls & -a -l
	You should change this to:
		$ ls -a -l &

3. You can use "<" or ">" to make input or output redirections,
	for example,
		$ ./test/echo < echo.c > echoout.txt
	"<" and ">" can only appear once in a command