Custom JumpStart Environment Variables

You can use environment variables in your begin and finish scripts. For example, a begin script might extract the disk size, SI_DISKSIZES, and install or not install particular packages on a system, based on the actual disk size the script extracts.

Information that is gathered about a system is stored in these environment variables, which are generally set or not, depending on the rule keywords and values you use in the rules file.

For example, information about which operating system is already installed on a system is only available in SI_INSTALLED after the installed keyword is used.

Table 8-9 describes these variables and their values.

Table 8-9 Installation Environment Variables

Environment Variable	Value
`SI_ARCH`	The hardware architecture of the install client. The `SI_ARCH` variable is set when the `arch` keyword is used in the `rules` file.
`SI_BEGIN`	The name of the begin script, if one is used.
`SI_CLASS`	The name of the profile that is used to install the install client.
`SI_DISKLIST`	A comma-separated list of disk names on the install client. The `SI_DISKLIST` variable is set when the `disksize` keyword is used and matched in the `rules` file. The `SI_DISKLIST` and `SI_NUMDISKS` variables are used to determine the physical disk to use for the `rootdisk`. `rootdisk` is described in How the System's Root Disk Is Determined.
`SI_DISKSIZES`	A comma-separated list of disk sizes on the install client. The `SI_DISKSIZES` variable is set when the `disksize` keyword is used and matched in the `rules` file.
`SI_DOMAINNAME`	The domain name. The `SI_DOMAINNAME` variable is set when the `dommainname` keyword is used and matched in the `rules` file.
`SI_FINISH`	The name of the finish script, if one is used.
`SI_HOSTADDRESS`	The install client's IP address.
`SI_HOSTNAME`	The install client's host name. The `SI_HOSTNAME` variable is set when the `hostname` keyword is used and matched in the `rules` file.
`SI_INSTALLED`	The device name of a disk with a specific operating system on the disk, for example, Solaris, SunOS, or System V. The `SI_INSTALLED` variable is set when the `installed` keyword is used and matched in the `rules` file. `SI_INST_OS` and `SI_INST_VER` are used to determine the value of `SI_INSTALLED`.
`SI_INST_OS`	The name of the operating system. `SI_INST_OS` and `SI_INST_VER` are used to determine the value of `SI_INSTALLED`.
`SI_INST_VER`	The version of the operating system. `SI_INST_OS` and `SI_INST_VER` are used to determine the value of `SI_INSTALLED`.
`SI_KARCH`	The install client's kernel architecture. The `SI_KARCH` variable is set when the `karch` keyword is used and matched in the `rules` file.
`SI_MEMSIZE`	The amount of physical memory on the install client. The `SI_MEMSIZE` variable is set when the `memsize` keyword is used and matched in the `rules` file.
`SI_MODEL`	The install client's model name. The `SI_MODEL` variable is set when the `model` keyword is used and matched in the `rules` file.
`SI_NETWORK`	The install client's network number. The `SI_NETWORK` variable is set when the `network` keyword is used and matched in the `rules` file.
`SI_NUMDISKS`	The number of disks on an install client. The `SI_NUMDISKS` variable is set when the `disksize` keyword is used and matched in the `rules` file. The `SI_NUMDISKS` and `SI_DISKLIST` variables are used to determine the physical disk to use for the `rootdisk`. `rootdisk` is described in How the System's Root Disk Is Determined.
`SI_OSNAME`	The operating system release on the Solaris software image. For example, you can use the `SI_OSNAME` variable in a script if you are installing the Solaris software on systems that are based on the version of the operating system on the Solaris Operating System DVD or the Solaris Software - 1 CD image.
`SI_ROOTDISK`	The device name of the disk that is represented by the logical name `rootdisk`. The `SI_ROOTDISK` variable is set when the `disksize` or the `installed` keyword is set to `rootdisk` in the `rules` file. The `SI_ROOTDISK` variable sets the device to boot from during the installation. Note - You cannot set the place of installation by using the probe keyword “`rootdisk`” in the rules file. For information on the "`rootdisk`" variable that is set in a JumpStart profile, see How the System's Root Disk Is Determined.
`SI_ROOTDISKSIZE`	The size of the disk that is represented by the logical name `rootdisk`. The `SI_ROOTDISKSIZE` variable is set when the `disksize` or the `installed` keyword is set to `rootdisk` in the `rules` file.
`SI_TOTALDISK`	The total amount of disk space on the install client. The `SI_TOTALDISK` variable is set when the `totaldisk` keyword is used and matched in the `rules` file.