Return a derivation that builds a script to run a virtual machine image of OS that shares its store with the host. The virtual machine runs with MEMORY-SIZE MiB of memory.

MAPPINGS is a list of <file-system-mapping> specifying mapping of host file systems into the guest.

When FULL-BOOT? is true, the returned script runs everything starting from the bootloader; otherwise it directly starts the operating system kernel. When VOLATILE? is true, an overlay is created on top of a read-only storage. Otherwise the storage is made persistent. The DISK-IMAGE-SIZE parameter specifies the size in bytes of the root disk image; it is mostly useful when FULL-BOOT? is true.

Return a 9p mount tag for host file system FS.

Return the a string-value gexp with the common QEMU options to boot IMAGE, with '-virtfs' options for the host file systems listed in SHARED-FS.

Return an operating system based on OS suitable for use in a virtualized environment with the store shared with the host. MAPPINGS is a list of <file-system-mapping> to realize in the virtualized OS.

Return a list-valued gexp representing the command to start QEMU to run IMAGE, assuming it uses the Linux kernel, and not sharing the store with the host.

Read boot parameters from SYSTEM's (system or generation) "parameters" file and returns the corresponding <boot-parameters> object or #f if the format is unrecognized. The object has its kernel-arguments extended in order to make it bootable.

Return an object representing the absolute file name of the kernel image of OS.