The request script is the only way your package can interact directly with the administrator installing it. It can be used, for example, to ask the administrator if optional pieces of a package should be installed.
The output of a request script must be a list of
environment variables and their values. This list can include any of the parameters
you created in the pkginfo file and the
parameters. The list can also introduce environment variables that have not
been defined elsewhere (although the pkginfo file should
always provide default values, when practical). For more information on package
environment variables, see Package Environment Variables.
The request script cannot modify any files. It only interacts with administrators installing the package and creates a list of environment variable assignments based upon that interaction. To enforce this restriction, the request script is executed as the non-privileged user install if that user exists; otherwise it is executed as the non-privileged user nobody. The request script does not have superuser authority.
The pkgadd command calls the request script with one argument that names the script's response file (the file that stores the administrator's responses).
The request script is not executed during package removal. However, the environment variables assigned by the script are saved and are available during removal.
The environment variable assignments should be added to the installation environment for use by the pkgadd command and other packaging scripts by writing them to the response file (known to the script as $1).
System environment variables and standard installation environment
variables, except for the
BASEDIR parameters, cannot
be modified by a request script. Any of the other environment
variables you created can be changed.
A request script can only modify the
BASEDIR parameter starting with the Solaris
2.5 and compatible releases.
Every environment variable that the request script may manipulate should be assigned a default value in the pkginfo file.
The format of the output list should be PARAM=value. For example:
The administrator's terminal is defined as standard input to the request script.
Do not perform any special analysis of the target system in a request script. It is risky to test the system for the presence of certain binaries or behaviors, and set environment variables based upon that analysis, because there is no guarantee that the request script will actually be executed at install time. The administrator installing the package may provide a response file that will insert the environment variables without ever calling the request script. If the request script is also evaluating the target file system, that evaluation may not happen. An analysis of the target system for special treatment is best left to the checkinstall script.
If it is possible that the administrators who will be installing your package will be using the JumpStartTM product, then the installation of your package must not be interactive. This implies that either you should not provide a request script with your package, or you need to communicate to the administrator that they should use the pkgask command, prior to installation, to store their responses to the request script. For more information on the pkgask command, see pkgask(1M).