Linux and C plus plus Learning

Emerge

Emerge is the front end of the portage,which is Gentoo linux’s package manager.

The program I made is a kind of emulation for using Arch linux’s package manager (which is pacman) in emerge’s command format.

Warning

No guarantee for security and stability.

This program just suit arch series distributions.

Compile

Just simply run make to compile the source code.

You can add emerge in your $PATH ,or use ./emerge for loading program localy.

Usage

Remember,install/sync/remove operations need to run as root. But with deep option,you must avoid run as root because deep use yay as final program instead of pacman.

1. Install package emerge <package_name>

   ‘-a’ for ask,ask before install the package. ‘-v’ for verbose,show the detail of the install process.

2. Search package emerge --search <package_name>

   ‘-s’ for search.

3. Sync repository emerge --sync

   emerge --update optional add package name for updating the selected pacakge,if package is null,update the system.

4. Remove package emerge --deselect <package_name> temporally set this reflects to remove package without check dependence.

   emerge --depclean <package_name> remove packages with dependence check.

5. additional option --usepkg means install package from local arch package. --oneshot means install package withou dependence check.

Eselect

Eselect is an utility in gentoo for selecting software versions when multiple versions of software coexist.

Gentoo’s engineering team writes eseselect through bash script, which makes the program simple and easy to expand.

In order to pratice my C++ capacity,I used C + + to imitate it. For the sake of realizing the extended function and reviewing the object-oriented knowledge I learned in college, I used the simple factory in the design pattern and the dynamic class registration.

Warning

No guarantee for security and stability.

You should edit the pathname in the program.Because though kernel usually located at /usr/src,the test file located at somewhere else in this program.

Compile

Just simply run make to compile the source code.

You can add eselect in your $PATH ,or use ./eselect for loading program localy.

Usage

eselect <module> <option>

The available module only have kernel now.The available option are list and set.

Here are some examples:

1. eselect kernel list
2. eselect kernel set 2