diff --git a/labs/xv6.html b/labs/xv6.html index 1749ca6..a5df08d 100644 --- a/labs/xv6.html +++ b/labs/xv6.html @@ -144,18 +144,29 @@ initial file system. You just ran one of them: ls.
Write a simple version of the UNIX find program: find all the files - in a directory tree that contain a user-specified string. + in a directory tree whose name matches a string. For example if the + file system contains a file a/b, then running find as + follows should produce: +
+ $ find . b + ./a/b + $ +
Some hints:
Modify the shell to support lists of commands, separated by ";" -
Modify the shell to support sub-shells by implementing "(" and ")" +
Modify the shell to support sub-shells by implementing "(" and ")" + +
Modify the shell to allow users to edit the command line