After installing POSIX in BS2000, you must install POSIX and the requisite software in the POSIX file system under the TSOS user ID. You do this with the aid of the POSIX installation program. You may also have to create and process other file systems. During initial installation of POSIX, root authorization (user number 0, group number 0) is automatically assigned to TSOS.
The following steps must be performed under the TSOS user ID for initial installation:
Ensure that the POSIX subsystem has not been started and that the POSIX information file SYSSSI.POSIX-BC.<version> is writable (ACCESS=*WRITE).
Call the POSIX installation program:
/START-POSIX-INSTALLATIONYou can also call the program in batch mode. For a precise description of masks and parameters, see "POSIX installation program in interactive mode " (interactive mode) or "POSIX installation program in batch mode " (batch mode).
Create and mount a new root and var file system
Call the option “Install POSIX subsystem” in the POSIX installation program and enter the specifications for the container file and root file system in the mask. The size of the root file system must be at least 50,000 PAM pages and must be created under SYSROOT. Make the root file system larger if you are installing multiple products (recommended size: 100,000 PAM pages or more).
The same mask will then be displayed again, so that you can enter the specifications for the var file system. The var file system must be at least 20,000 PAM pages in size and must be created under SYSROOT of the HOME pubset.
For further information about space requirements on the root and var file systems for the products to be installed, refer to the relevant product manuals and the release notice on POSIX-BC.
Important directories and files are then copied automatically from the generic root file system to the newly created root and var file system. The directories, device and administrative files created in the installation process are logged. Once all directories and files have been copied, it is then possible to work with POSIX using the basic shell. Once the POSIX subsystem has automatically been restarted, the BS2000 command START-POSIX-SHELL can be entered.