log-append

#/bin/sh

## Update log file.
## Author: Przemyslaw Pawelczyk

[ -z "$UID" ]  && UID=0
[ -z "$HOME" ] && HOME=$(awk -F: '$3=="'"$UID"'"{print$6;exit;}' /etc/passwd)

if [ "$LOGDATE" = "boot" ]; then
	BOOT_SECS="${BOOT_SECS:-0}"
	UPTIME_SECS="$(sed 's, .*,,' /proc/uptime)"
	LOGDATE="now - $UPTIME_SECS secs - $BOOT_SECS secs"
fi

LOGDATE="${LOGDATE:-now}"
LOGFILE="${LOGFILE:-$HOME/.log}"

echo "$(date -d "$LOGDATE" +"%FT%T%z") $@" >>"$LOGFILE"