core: preserve quickshell exit code

core/cmd/dms/shell.go

@@ -18,6 +18,25 @@ import (
 
 type ipcTargets map[string]map[string][]string
 
+// getProcessExitCode returns the exit code from a ProcessState.
+// For normal exits, returns the exit code directly.
+// For signal termination, returns 128 + signal number (Unix convention).
+func getProcessExitCode(state *os.ProcessState) int {
+	if state == nil {
+		return 1
+	}
+	if code := state.ExitCode(); code != -1 {
+		return code
+	}
+	// Process was killed by signal - extract signal number
+	if status, ok := state.Sys().(syscall.WaitStatus); ok {
+		if status.Signaled() {
+			return 128 + int(status.Signal())
+		}
+	}
+	return 1
+}
+
 var isSessionManaged bool
 
 func execDetachedRestart(targetPID int) {
@@ -235,7 +254,7 @@ func runShellInteractive(session bool) {
 				cmd.Process.Signal(syscall.SIGTERM)
 			}
 			os.Remove(socketPath)
-			os.Exit(1)
+			os.Exit(getProcessExitCode(cmd.ProcessState))
 		}
 	}
 }
@@ -460,7 +479,7 @@ func runShellDaemon(session bool) {
 				cmd.Process.Signal(syscall.SIGTERM)
 			}
 			os.Remove(socketPath)
-			os.Exit(1)
+			os.Exit(getProcessExitCode(cmd.ProcessState))
 		}
 	}
 }