cli: Don't print help and don't skip defered funcs on failures

CHANGELOG.md

@@ -9,9 +9,11 @@ Changelog for NeoFS Node
 - Expose health status of inner ring via Prometheus (#2934)
 
 ### Fixed
+- `defer` func is not skipped in cobra-based programs (#2942)
 
 ### Changed
 - `ObjectService`'s `Put` RPC handler caches up to 10K lists of per-object sorted container nodes (#2901)
+- When an error is returned, no additional help output is displayed in cobra-based programs (#2942)
 
 ### Removed
 

cmd/internal/custom_errors/errors.go

@@ -0,0 +1,27 @@
+package custom_errors
+
+import (
+	"errors"
+	"fmt"
+	"os"
+)
+
+type ExitErr struct {
+	Code  int
+	Cause error
+}
+
+func (x ExitErr) Error() string { return x.Cause.Error() }
+
+// ExitOnErr writes error to os.Stderr and calls os.Exit with passed exit code or by default 1.
+// Does nothing if err is nil.
+func ExitOnErr(err error) {
+	if err != nil {
+		var e ExitErr
+		if !errors.As(err, &e) {
+			e.Code = 1
+		}
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(e.Code)
+	}
+}

cmd/neofs-adm/internal/modules/root.go

@@ -19,8 +19,9 @@ var (
 		Short: "NeoFS Administrative Tool",
 		Long: `NeoFS Administrative Tool provides functions to setup and
 manage NeoFS network deployment.`,
-		RunE:         entryPoint,
-		SilenceUsage: true,
+		RunE:          entryPoint,
+		SilenceUsage:  true,
+		SilenceErrors: true,
 	}
 
 	configFlag = "config"