Bash Prompt HOWTO: $Revision: 0.100 $, $Date: 2009/08/07 02:33:22 $ | ||
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If you have a laptop with APM installed, try the following PROMPT_COMMAND to create an environment variable ${battery} you can add to your prompt. This will indicate if AC power is connected and percentage power remaining. AC power is indicated by a "^" (for on) and a "v" (for off) before the percentage value.
function prompt_command { # As much of the response of the "apm" command as is # necessary to identify the given condition: NO_AC_MESG="AC off" AC_MESG="AC on" APMD_RESPONSE="$(apm)" case ${APMD_RESPONSE} in *${AC_MESG}*) ACstat="^" ;; *${NO_AC_MESG}*) ACstat="v" ;; esac battery="${temp##* }" battery="${ACstat}${battery}" }
This worked the last time I had access to an APM-based system, but I'm afraid that was years gone. If you have an APM system and have to make changes, please let me know.