The installation preview phase
These steps occur during the installation preview phase.
- The interim fix manager initializes all commands and libraries, and extracts the interim fix metadata from the interim fix package.
- The interim fix attributes and description are listed.
- The emgr command performs a lock-checking procedure by checking the installed interim fix data if the target files that are being delivered by this interim fix package already have existing interim fixes installed. If one or more interim fix files that are delivered by this interim fix package are locked, the emgr command does not allow the installation or installation preview to proceed.
- The emgr command performs installp package prerequisite verification. If the user supplied an installp prerequisite file, the emgr command checks the prerequisites at this stage. If one or more of the prerequisites is not met, the emgr command does not allow the installation or installation preview operation to proceed.
- The emgr command performs interim fix to interim fix prerequisite verification.
The emgr command checks the following:
- All interim fix prerequisites for the interim fix package being checked are installed.
- All interim fix xrequisites for the interim fix package being checked are not installed.
- There are no previously installed interim fixes that list the interim fix being checked as an xrequisite.
Note: You can use the epkg command to specify the interim fix to interim fix prerequisites for an package. For more information on checking prerequisites, see Interim fix user-specified package components. - The emgr command checks for space requirements by checking
whether the target file systems contain adequate space for the installation
of the interim fix package. This
includes space for unpacking the interim fix files,
creating database entries, saving replaced files, installing interim fix files,
creating interim fix mounts when
using the -m flag, archiving library members, and
other miscellaneous tasks. The emgr command also adds a
small buffer to the various space calculations to account for file metadata
and other factors.
If the user specifies the auto-expand flag using the -X flag, then the emgr command attempts to expand the file system to the required size. If space requirements cannot be met, the emgr command stops the installation. If the user specifies a preview installation using the -p flag, then the emgr command only reports the space statistics without attempting expansion
If the user specifies a preview installation using the -p flag, the emgr command does not perform the interim fix installation phase. Instead the emgr command skips to the summary and cleanup phase of installation.