Writing a Shell, need help.

[Bluuz]

I'm writing a simple shell on Linux and one of the requirements is that the user should be able to enter in something such as "gedit ./readme.txt" And the .txt file will open. However, I am not allowed to use the function "system" to do this. Would someone mind explaining how to do this?

[MikeD]

The way the actual shell does it: fork a new process and replace the child's process image with gedit's image, passing the rest of the arguments.

[Bluuz]

The way the actual shell does it: fork a new process and replace the child's process image with gedit's image, passing the rest of the arguments.

How do you do that?

[MikeD]

How do you do that?

 

http://linux.about.com/library/cmd/blcmdl3_execv.htm

[Bluuz]

http://linux.about.com/library/cmd/blcmdl3_execv.htm

Alright, thanks.

One more thing, I also have to implement basic functions such as "cd" and "ls". How would I go about that?

[MikeD]

Ls should be the same gedit, unless you want to create your own way of displaying the files.

To determine the path to pass to ls and to implement cd I would keep a shell variable with the complete path and when the command is cd, verify if the destination folder exists and update the var.