package app import ( "bytes" "encoding/base64" "encoding/gob" "fmt" "git.ophivana.moe/cat/fortify/internal/final" "os" "strings" "syscall" "git.ophivana.moe/cat/fortify/internal/util" ) const launcherPayload = "FORTIFY_LAUNCHER_PAYLOAD" func (a *App) launcherPayloadEnv() string { r := &bytes.Buffer{} enc := base64.NewEncoder(base64.StdEncoding, r) if err := gob.NewEncoder(enc).Encode(a.command); err != nil { final.Fatal("Error encoding launcher payload:", err) } _ = enc.Close() return launcherPayload + "=" + r.String() } // Early hidden launcher path func Early(printVersion bool) { if printVersion { if r, ok := os.LookupEnv(launcherPayload); ok { dec := base64.NewDecoder(base64.StdEncoding, strings.NewReader(r)) var argv []string if err := gob.NewDecoder(dec).Decode(&argv); err != nil { fmt.Println("Error decoding launcher payload:", err) os.Exit(1) } if err := os.Unsetenv(launcherPayload); err != nil { fmt.Println("Error unsetting launcher payload:", err) // not fatal, do not fail } var p string if len(argv) > 0 { if p, ok = util.Which(argv[0]); !ok { fmt.Printf("Did not find '%s' in PATH\n", argv[0]) os.Exit(1) } } else { if p, ok = os.LookupEnv("SHELL"); !ok { fmt.Println("No command was specified and $SHELL was unset") os.Exit(1) } argv = []string{p} } if err := syscall.Exec(p, argv, os.Environ()); err != nil { fmt.Println("Error executing launcher payload:", err) os.Exit(1) } // unreachable os.Exit(1) return } } }