skeud

commit: baa0af5f8d7aa2c51d6ab068e664086604f1b504
parent 74ae56b5afeea243873567b593f8defc09fff739
Author: Haelwenn (lanodan) Monnier <contact@hacktivis.me>
Date:   Mon, 11 Sep 2023 08:56:20 +0200

su: Call initgroups(3)

Diffstat:
M
su.c
7
++++++-

1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/su.c b/su.c
@@ -2,7 +2,7 @@
 // SPDX-License-Identifier: MPL-2.0
 
 #define _POSIX_C_SOURCE 200809L
-// for explicit_bzero
+// for explicit_bzero, initgroups
 #define _DEFAULT_SOURCE
 
 #ifdef __linux__
@@ -14,6 +14,7 @@
 
 #include <assert.h>  // assert
 #include <errno.h>   // errno
+#include <grp.h>     // initgroups
 #include <pwd.h>     // getpwnam
 #include <stdbool.h> // bool
 #include <stdio.h>   // fprintf, perror
@@ -198,6 +199,10 @@ main(int argc, char *argv[])
 	{
 		perror("su: setgid");
 	}
+	if(initgroups(username, pwent->pw_gid) < 0)
+	{
+		perror("su: initgroups");
+	}
 	if(setuid(pwent->pw_uid) < 0)
 	{
 		perror("su: setuid");