From e1107e514dfdf74db76e581f27feb09c3dd6989a Mon Sep 17 00:00:00 2001
From: Rifat Azad <rifat.44.azad.rifs@gmail.com>
Date: Fri, 6 Dec 2024 22:48:14 +0600
Subject: [PATCH] kernel: susfs: CONFIG_KSU_SUSFS_INFO syscall to get susfs
 version & variant

---
 kernel/Kconfig     |  7 +++++++
 kernel/Makefile    |  3 +++
 kernel/core_hook.c | 43 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 53 insertions(+)

diff --git a/kernel/Kconfig b/kernel/Kconfig
index 076c61dd..be04a3fa 100644
--- a/kernel/Kconfig
+++ b/kernel/Kconfig
@@ -154,6 +154,13 @@ config KSU_SUSFS_SUS_SU
       - Only apps with root access granted by ksu manager are allowed to get root.
       - Also overlayfs is required.
 
+config KSU_SUSFS_INFO
+    bool "Enable meta-data of susfs"
+    depends on KSU_SUSFS
+    default y
+    help
+      - Allow parsing meta-data of susfs version info.
+
 endmenu
 
 endmenu
diff --git a/kernel/Makefile b/kernel/Makefile
index 26c689ca..eb71dd5a 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -196,6 +196,9 @@ endif
 ifdef KSU_SUSFS_SUS_SU
 ccflags-y += -DKSU_SUSFS_SUS_SU
 endif
+ifdef KSU_SUSFS_INFO
+ccflags-y += -DKSU_SUSFS_INFO
+endif
 else
 $(info -- You have not integrate susfs in your kernel.)
 $(info -- Read: https://gitlab.com/simonpunk/susfs4ksu)
diff --git a/kernel/core_hook.c b/kernel/core_hook.c
index 9cc12812..86f8d372 100644
--- a/kernel/core_hook.c
+++ b/kernel/core_hook.c
@@ -590,6 +590,49 @@ int ksu_handle_prctl(int option, unsigned long arg2, unsigned long arg3,
 			return 0;
 		}
 #endif //#ifdef CONFIG_KSU_SUSFS_SUS_SU
+#ifdef CONFIG_KSU_SUSFS_INFO
+		if (arg2 == CMD_SUSFS_SHOW_VERSION) {
+			const char *version = SUSFS_VERSION;
+			int error = 0;
+
+			if (copy_to_user((void __user*)arg3, version, strlen(version) + 1)) {
+				pr_info("susfs: copy_to_user() failed\n");
+				error = -EFAULT;
+			}
+
+			if (copy_to_user((void __user*)arg5, version, strlen(version) + 1)) {
+				pr_info("susfs: copy_to_user() failed\n");
+				error = -EFAULT;
+			}
+
+			if (copy_to_user((void __user*)arg5 + strlen(version) + 1, &error, sizeof(error))) {
+				pr_info("susfs: copy_to_user() failed (error status)\n");
+			}
+
+			return 0;
+		}
+
+		if (arg2 == CMD_SUSFS_SHOW_VARIANT) {
+			const char *variant = SUSFS_VARIANT;
+			int error = 0;
+
+			if (copy_to_user((void __user*)arg3, variant, strlen(variant) + 1)) {
+				pr_info("susfs: copy_to_user() failed\n");
+				error = -EFAULT;
+			}
+
+			if (copy_to_user((void __user*)arg5, variant, strlen(variant) + 1)) {
+				pr_info("susfs: copy_to_user() failed\n");
+				error = -EFAULT;
+			}
+
+			if (copy_to_user((void __user*)arg5 + strlen(variant) + 1, &error, sizeof(error))) {
+				pr_info("susfs: copy_to_user() failed (error status)\n");
+			}
+
+			return 0;
+		}
+#endif //#ifdef CONFIG_KSU_SUSFS_INFO
 	}
 #endif //#ifdef CONFIG_KSU_SUSFS