1 files changed, 52 insertions, 0 deletions
diff --git a/internal/app/app.go b/internal/app/app.go
new file mode 100644
index 00000000..9d1165f4
--- /dev/null
+++ b/internal/app/app.go
@@ -0,0 +1,52 @@
+package app
+
+import (
+	"os/exec"
+	"sync"
+)
+
+type App interface {
+	Seal(config *Config) error
+	Start() error
+	Wait() (int, error)
+	WaitErr() error
+	String() string
+}
+
+type app struct {
+	// child process related information
+	seal *appSeal
+	// underlying fortified child process
+	cmd *exec.Cmd
+	// error returned waiting for process
+	wait error
+
+	lock sync.RWMutex
+}
+
+func (a *app) String() string {
+	if a == nil {
+		return "(invalid fortified app)"
+	}
+
+	a.lock.RLock()
+	defer a.lock.RUnlock()
+
+	if a.cmd != nil {
+		return a.cmd.String()
+	}
+
+	if a.seal != nil {
+		return "(sealed fortified app as uid " + a.seal.sys.Uid + ")"
+	}
+
+	return "(unsealed fortified app)"
+}
+
+func (a *app) WaitErr() error {
+	return a.wait
+}
+
+func New() App {
+	return new(app)
+}