gistfile1.sh

#!/bin/bash

# get the absolute path of the executable
SELF_PATH=$(cd -P -- "$(dirname -- "$0")" && pwd -P) && SELF_PATH=$SELF_PATH/$(basename -- "$0")

# resolve symlinks
while [ -h $SELF_PATH ]; do
	# 1) cd to directory of the symlink
	# 2) cd to the directory of where the symlink points
	# 3) get the pwd
	# 4) append the basename
	DIR=$(dirname -- "$SELF_PATH")
	SYM=$(readlink $SELF_PATH)
	SELF_PATH=$(cd $DIR && cd $(dirname -- "$SYM") && pwd)/$(basename -- "$SYM")
done