$ export GOPATH=$HOME/go
$ echo $GOPATH
$ /home/rangga/go

$ go run /home/rangga/go/src/Test/testpath.go
$ /home/rangga

GOARCH="amd64"
GOBIN=""
GOCHAR="6"
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/rangga/go"
GORACE=""
GOROOT="/usr"
GOTOOLDIR="/usr/lib/gccgo/tool"
TERM="dumb"
CC="gcc"
GOGCCFLAGS="-g -O2 -fPIC -m64 -pthread"
CXX="g++"
CGO_ENABLED="1"

func Getwd() (dir string, err error)

$ go run /home/rangga/go/src/Test/testpath.go
$ /home/rangga

$ cd /home/rangga/go/src/Test/
$ go run testpath.go
$ /home/rangga/go/src/Test