add fabian

ex-communication/ex-finger.tex

@@ -20,6 +20,9 @@
 \end{Exercise}
 
 \begin{Answer}
+\begin{lbar}
+This solution is from Fabian Becker.
+\end{lbar}
 \Question
-Supply code and it may get included here.
+\lstinputlisting[label=src:fingerd,caption=A finger daemon]{ex-communication/src/finger.go}
 \end{Answer}

ex-communication/ex-quine.tex

@@ -5,9 +5,12 @@
 \end{Exercise}
 
 \begin{Answer}
+\begin{lbar}
+This solution is from Russ Cox. It was posted to 
+the Go Nuts mailing list.
+\end{lbar}
 \Question 
-The following Quine is from Russ Cox:
-\begin{lstlisting}
+\begin{lstlisting}[caption=A Go quine]
 /* Go quine */
 package main
 import "fmt"

ex-communication/src/finger.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"bufio"
+	"io/ioutil"
+	"errors"
+	"net"
+	"os/user"
+	"flag"
+	"strconv"
+)
+
+var port *int = flag.Int("port", 79, "Port to listen on")
+
+func main() {
+	flag.Parse()
+	ln, err := net.Listen("tcp", ":"+ strconv.Itoa(*port))
+	if err != nil {
+		panic(err)
+	}
+	for {
+		conn, err := ln.Accept()
+		if err != nil {
+			continue
+		}
+		go handleConnection(conn)
+	}
+}
+
+func handleConnection(conn net.Conn) {
+	defer conn.Close()
+	reader := bufio.NewReader(conn)
+	usr, _, _ := reader.ReadLine()
+
+	info, err := getUserInfo(string(usr))
+	if err != nil {
+		conn.Write([]byte(err.Error()))
+	} else {
+		conn.Write(info)
+	}
+}
+
+func getUserInfo(usr string) ([]byte, error) {
+	u, e := user.Lookup(usr)
+	if e != nil {
+		return nil, e
+	}
+	data, err := ioutil.ReadFile(u.HomeDir + ".plan")
+	if err != nil {
+		return data, errors.New("User doesn't have a .plan file!\n")
+	}
+	return data, nil
+}

go-contributors.tex

@@ -9,6 +9,7 @@
 \emph{Cecil New},
 \emph{Damian Gryski},
 \emph{Dan Kortschak},
+\emph{Fabian Becker},
 \emph{Filip Zaludek},
 \emph{Haiping Fan},
 \emph{Jaap Akkerhuis},

go.bib

@@ -34,21 +34,21 @@ @misc{duck_typing
 }
 
 @misc{bubblesort,
-    author = "Wikipedia",
+    author = "{W}ikipedia",
     howpublished = {\url{http://en.wikipedia.org/wiki/Bubble_sort}},
     title = "Bubble sort",
     year = 2010
 }
 
 @misc{go_nuts,
     author = "{G}o Community",
-    title  = "{G}o Nuts mailing list",
+    title  = "{G}o {N}uts mailing list",
     howpublished = {\url{http://groups.google.com/group/golang-nuts}},
     year = 2010
 }
 
 @misc{go_spec,
-    author = "{G}o Authors",
+    author = "{G}o {A}uthors",
     title  = "{G}o language specification",
     howpublished = { \url{http://golang.org/doc/go_spec.html}},
     year = 2010

go_a4.tex

@@ -37,6 +37,7 @@
 \begin{document}
 \thispagestyle{empty}
 \newcommand{\version}{1.0}
+
 %% Title page.
 \begin{center}
 \hspace{1.0cm}{\scalefont{6.00}{\sffamily{\mbox{\vspace{1.0cm}Learning Go}}}}\\