unitproc/bktemp-secondsUntilMidnight

   1 #!/bin/bash
   2
   3 # Desc: Template to check that apps, files, or dirs exist.
   4 # Author: Steven Baltaktei Sandoval
   5 # License: GPLv3+
   6
   7 #==BEGIN Define script parameters==
   8 #===BEGIN Declare local script functions===
   9 timeUntilMidnight(){
  10     # Desc: Report seconds until midnight
  11     # Output: stdout: seconds until midnight
  12     TIME_CURRENT="$(date --iso-8601=seconds)" ; # Produce `date`-parsable current timestamp with resolution of 1 second.
  13     TIME_CURRENT_SHORT="$(date -d "$TIME_CURRENT" +%Y%m%dT%H%M%S%z)" # Produce separator-less current timestamp with resolution 1 second.
  14     DATE_CURRENT="$(date -d "$TIME_CURRENT" --iso-8601=date)" ; # Produce `date`-parsable current timestamp with resolution of 1 day.
  15     DATE_CURRENT_SHORT="$(date -d "$TIME_CURRENT" +%Y%m%d)" ; # Produce separator-less current timestamp with resolution 1 day.
  16     DATE_TOMORROW="$(date -d "$TIME_CURRENT next day" --iso-8601=date)" ; # Produce timestamp of tomorrow's date (res. 1 day).
  17     TIME_NEXT_MIDNIGHT="$(date -d "$DATE_TOMORROW" --iso-8601=seconds)" ; # Produce `date`-parsable timestamp of closest future midnight (res. 1 second).
  18     SECONDS_UNTIL_NEXT_MIDNIGHT="$(( $(date +%s -d "$TIME_NEXT_MIDNIGHT") - $(date +%s -d "$TIME_CURRENT") ))" ; # Calculate seconds until closest future midnight (res. 1 second).
  19     echo "$SECONDS_UNTIL_NEXT_MIDNIGHT" 2>/dev/null;
  20 } # Report seconds until next midnight
  21 #===END Declare local script functions===
  22 #==END Define script parameters==
  23
  24
  25 #==BEGIN sample code==
  26 echo "Time until next midnight (seconds):$(timeUntilMidnight)"
  27 #==END sample code==