apm_available
Check for Advanced Power Management support
TLDR
Check if APM is available
$ apm_available && echo "APM supported"
Use in script conditionals$ if apm_available; then apm -l; fi
SYNOPSIS
apm_available
DESCRIPTION
apm_available tests whether Advanced Power Management (APM) support is available on the current system by checking for the /proc/apm file. It returns exit status 0 if APM is supported and 1 if not.This utility is useful in scripts that need to choose between APM and ACPI for power management queries.
PARAMETERS
This command takes no arguments.
CAVEATS
APM is deprecated on modern systems in favor of ACPI. Most modern hardware only supports ACPI. The tool checks for APM BIOS availability, not functionality.
HISTORY
apm_available is part of the apmd package from the 1990s and early 2000s, when APM was the standard power management interface for PCs.
SEE ALSO
apm(1), acpi_available(1), acpi(1)
