ACPI_AVAILABLE(1) General Commands Manual ACPI_AVAILABLE(1)
acpi_available - test whether ACPI subsystem is available
acpi_available checks whether the ACPI ("Advanced Configuration and
Power Interface") subsystem is available, as evidenced by the presence
of the /proc/acpi directory.
0 (true) ACPI subsystem is available
1 (false) ACPI subsystem is not available
2 usage error (arguments supplied)
/proc/acpi ACPI status information file
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