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
usage error (arguments supplied)
ACPI status information file
This manual page was written by Thomas Hood <email@example.com>.