fix windows paths and permissions

.gitignore

@@ -2,3 +2,4 @@
 .vscode
 dist
 hostctl
+hostctl.exe

cmd/root.go

@@ -41,7 +41,7 @@ func init() {
 	defaultHostsFile := "/etc/hosts"
 
 	if runtime.GOOS == "windows" {
-		defaultHostsFile = `C:\Windows\System32\Drivers\etc\hosts`
+		defaultHostsFile = `C:/Windows/System32/Drivers/etc/hosts`
 	}
 
 	envHostFile := os.Getenv("HOSTCTL_FILE")

pkg/host/add.go

@@ -74,7 +74,7 @@ func add(n *hostFile, opts *commonAddOptions) error {
 	}
 	currData.profiles[opts.Profile] = append(currData.profiles[opts.Profile], n.profiles["default"]...)
 
-	dstFile, err := os.OpenFile(opts.Dst, os.O_APPEND|os.O_CREATE|os.O_RDWR, 0644)
+	dstFile, err := os.OpenFile(opts.Dst, os.O_CREATE|os.O_RDWR|os.O_TRUNC, 0644)
 	if err != nil {
 		return err
 	}

pkg/host/disable.go

@@ -31,7 +31,7 @@ func Disable(dst, profile string) error {
 		disableProfile(h, profile)
 	}
 
-	dstFile, err := os.OpenFile(dst, os.O_APPEND|os.O_CREATE|os.O_RDWR, 0644)
+	dstFile, err := os.OpenFile(dst, os.O_CREATE|os.O_RDWR|os.O_TRUNC, 0644)
 	if err != nil {
 		return err
 	}

pkg/host/enable.go

@@ -32,7 +32,7 @@ func Enable(dst, profile string) error {
 		enableProfile(h, profile)
 	}
 
-	dstFile, err := os.OpenFile(dst, os.O_APPEND|os.O_CREATE|os.O_RDWR, 0644)
+	dstFile, err := os.OpenFile(dst, os.O_CREATE|os.O_RDWR|os.O_TRUNC, 0644)
 	if err != nil {
 		return err
 	}

pkg/host/remove.go

@@ -30,7 +30,7 @@ func Remove(dst, profile string) error {
 		delete(h.profiles, profile)
 	}
 
-	dstFile, err := os.OpenFile(dst, os.O_APPEND|os.O_CREATE|os.O_RDWR, 0644)
+	dstFile, err := os.OpenFile(dst, os.O_CREATE|os.O_RDWR|os.O_TRUNC, 0644)
 	if err != nil {
 		return err
 	}