Graceful failure plus go fmt

If the db file isn't there, or it's corrupt, allow for the creation of an empty
slice of Creds.

main.go

@@ -3,11 +3,11 @@ package main
 import (
 	"encoding/json"
 	"flag"
+	"io/ioutil"
 	"log"
 	"net/http"
 	"sync"
 	"text/template"
-    "io/ioutil"
 )
 
 type Cred struct {
@@ -36,26 +36,31 @@ func passHandler(resp http.ResponseWriter, req *http.Request) {
 	defer m.Unlock()
 	creds = append(creds, c)
 	b, err := json.Marshal(creds)
-    if err != nil {
-        log.Fatal(err)
-    }
-    err = ioutil.WriteFile(*db_file, b, 0644)
-    if err != nil {
-        log.Fatal(err)
-    }
+	if err != nil {
+		log.Fatal(err)
+	}
+	err = ioutil.WriteFile(*db_file, b, 0644)
+	if err != nil {
+		log.Fatal(err)
+	}
 	http.Redirect(resp, req, "/", http.StatusTemporaryRedirect)
 }
 
+func init_db() {
+	b, err := ioutil.ReadFile(*db_file)
+	if err != nil {
+		log.Println("Problem opening db file", err)
+	}
+	err = json.Unmarshal(b, &creds)
+	if err != nil {
+		log.Println("Problem parsing db file", err)
+		creds = make([]Cred, 0)
+	}
+}
+
 func main() {
 	flag.Parse()
-    b, err := ioutil.ReadFile(*db_file)
-    if err != nil {
-        log.Fatal("Problem opening db file", err)
-    }
-    err = json.Unmarshal(b, &creds)
-    if err != nil {
-        log.Fatal("Problem parsing db file", err)
-    }
+	init_db()
 	http.HandleFunc("/", homeHandler)
 	http.HandleFunc("/pass", passHandler)
 	http.Handle("/s/", http.StripPrefix("/s/",