From b2335fb95f3843170777da7d31851dfea3a0fc82 Mon Sep 17 00:00:00 2001
From: jasoni <jasoni@openbsd.org>
Date: Wed, 12 Apr 2000 04:22:40 +0000
Subject: [PATCH] Implement linux's setfsuid and getfsuid (from NetBSD)

---
 sys/compat/linux/linux_misc.c    | 34 +++++++++++++++++++++++++++++++-
 sys/compat/linux/syscalls.master |  6 +++---
 2 files changed, 36 insertions(+), 4 deletions(-)

diff --git a/sys/compat/linux/linux_misc.c b/sys/compat/linux/linux_misc.c
index 3f1653cd7b8..4c5a58e46eb 100644
--- a/sys/compat/linux/linux_misc.c
+++ b/sys/compat/linux/linux_misc.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: linux_misc.c,v 1.26 2000/02/28 13:29:30 jasoni Exp $	*/
+/*	$OpenBSD: linux_misc.c,v 1.27 2000/04/12 04:22:40 jasoni Exp $	*/
 /*	$NetBSD: linux_misc.c,v 1.27 1996/05/20 01:59:21 fvdl Exp $	*/
 
 /*
@@ -1440,6 +1440,38 @@ linux_sys_getresuid(p, v, retval)
 	return (copyout(&pc->p_svuid, SCARG(uap, suid), sizeof(uid_t)));
 }
 
+/*
+ * We have nonexistent fsuid equal to uid.
+ * If modification is requested, refuse.
+ */
+int
+linux_sys_setfsuid(p, v, retval)
+	 struct proc *p;
+	 void *v;
+	 register_t *retval;
+{
+	 struct linux_sys_setfsuid_args /* {
+		 syscallarg(uid_t) uid;
+	 } */ *uap = v;
+	 uid_t uid;
+
+	 uid = SCARG(uap, uid);
+	 if (p->p_cred->p_ruid != uid)
+		 return sys_nosys(p, v, retval);
+	 else
+		 return (0);
+}
+
+int
+linux_sys_getfsuid(p, v, retval)
+	struct proc *p;
+	void *v;
+	register_t *retval;
+{
+	return sys_getuid(p, v, retval);
+}
+
+
 int
 linux_sys_nice(p, v, retval)
 	struct proc *p;
diff --git a/sys/compat/linux/syscalls.master b/sys/compat/linux/syscalls.master
index 21162ac8a98..932f76f9fa5 100644
--- a/sys/compat/linux/syscalls.master
+++ b/sys/compat/linux/syscalls.master
@@ -1,4 +1,4 @@
-	$OpenBSD: syscalls.master,v 1.21 2000/04/04 05:31:50 jasoni Exp $
+	$OpenBSD: syscalls.master,v 1.22 2000/04/12 04:22:40 jasoni Exp $
 ;	$NetBSD: syscalls.master,v 1.15 1995/12/18 14:35:10 fvdl Exp $
 
 ;	@(#)syscalls.master	8.1 (Berkeley) 7/19/93
@@ -225,8 +225,8 @@
 135	UNIMPL		sysfs
 136	STD		{ int linux_sys_personality(int per); }
 137	UNIMPL		afs_syscall
-138	UNIMPL		setfsuid
-139	UNIMPL		getfsuid
+138	STD		{ int linux_sys_setfsuid(uid_t uid); }
+139	NOARGS		{ int linux_sys_getfsuid(void); }
 140	STD		{ int linux_sys_llseek(int fd, u_int32_t ohigh, \
 			    u_int32_t olow, caddr_t res, int whence); }
 141	STD		{ int linux_sys_getdents(int fd, void *dirent, \
-- 
2.20.1