[syslinux] Recoginizng which boot agent was used

[George Vicherek]

Hi,

Is there a way for init=/linuxrc to know which package (syslinux, 
pxelinux, ...) was used for booting? What would be a reliable way to 
detect if we booted via net or from a hdd/cdrom? Is there a variable 
which gets initialized with the boot device?

Thanks,

George

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