skeud

commit: 496ec40ffce5f0d5745c83276358741527d5e15b
parent 380bdc6c3b4c7dd4c3abb6478b36a9cb8593d431
Author: Haelwenn (lanodan) Monnier <contact@hacktivis.me>
Date:   Sun, 10 Sep 2023 13:12:43 +0200

su: Restrict [-s shell] to super-user

Diffstat:
M
su.c
6
++++++

1 file changed, 6 insertions(+), 0 deletions(-)
diff --git a/su.c b/su.c
@@ -54,6 +54,12 @@ main(int argc, char *argv[])
 			username = optarg;
 			break;
 		case 's': // shell
+			if(getuid() != 0)
+			{
+				fprintf(stderr, "su: Only the super-user can override the target shell");
+				return 1;
+			}
+
 			shell = optarg;
 			break;
 		case 'p': // preserve environment