Add lchown(2).

2 files changed, 56 insertions, 3 deletions

diff --git a/sys/kern/syscalls.master b/sys/kern/syscalls.master
index 3e480c3a0cf..16f4245b2d0 100644
--- a/sys/kern/syscalls.master
+++ b/sys/kern/syscalls.master
@@ -1,9 +1,9 @@
-	$OpenBSD: syscalls.master,v 1.12 1996/10/29 03:46:28 deraadt Exp $
+	$OpenBSD: syscalls.master,v 1.13 1997/01/26 05:18:27 downsj Exp $
 ;	$NetBSD: syscalls.master,v 1.32 1996/04/23 10:24:21 mycroft Exp $
 
 ;	@(#)syscalls.master	8.2 (Berkeley) 1/13/94
 
-; NetBSD system call name/number "master" file.
+; OpenBSD system call name/number "master" file.
 ; (See syscalls.conf to see what it is processed into.)
 ;
 ; Fields: number type [type-dependent ...]
@@ -458,3 +458,4 @@
 252	STD		{ int sys_poll(struct pollfd *fds, \
 			    unsigned long nfds, int timeout); }
 253	STD		{ int sys_issetugid(void); }
+254	STD		{ int sys_lchown(char *path, int uid, int gid); }
diff --git a/sys/kern/vfs_syscalls.c b/sys/kern/vfs_syscalls.c
index d2c14f3dc0f..4ebf43cc0d0 100644
--- a/sys/kern/vfs_syscalls.c
+++ b/sys/kern/vfs_syscalls.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: vfs_syscalls.c,v 1.19 1997/01/25 00:27:31 dm Exp $	*/
+/*	$OpenBSD: vfs_syscalls.c,v 1.20 1997/01/26 05:18:29 downsj Exp $	*/
 /*	$NetBSD: vfs_syscalls.c,v 1.71 1996/04/23 10:29:02 mycroft Exp $	*/
 
 /*
@@ -1564,6 +1564,58 @@ out:
 }
 
 /*
+ * Set ownership given a path name, without following links.
+ */
+/* ARGSUSED */
+int
+sys_lchown(p, v, retval)
+	struct proc *p;
+	void *v;
+	register_t *retval;
+{
+	register struct sys_lchown_args /* {
+		syscallarg(char *) path;
+		syscallarg(int) uid;
+		syscallarg(int) gid;
+	} */ *uap = v;
+	register struct vnode *vp;
+	struct vattr vattr;
+	int error;
+	struct nameidata nd;
+	u_short mode;
+
+	NDINIT(&nd, LOOKUP, NOFOLLOW, UIO_USERSPACE, SCARG(uap, path), p);
+	if ((error = namei(&nd)) != 0)
+		return (error);
+	vp = nd.ni_vp;
+	VOP_LEASE(vp, p, p->p_ucred, LEASE_WRITE);
+	VOP_LOCK(vp);
+	if (vp->v_mount->mnt_flag & MNT_RDONLY)
+		error = EROFS;
+	else {
+		if (suser(p->p_ucred, &p->p_acflag) ||
+		    suid_clear) {
+			error = VOP_GETATTR(vp, &vattr, p->p_ucred, p);
+			if (error)
+				goto out;
+			mode = vattr.va_mode & ~(VSUID | VSGID);
+			if (mode == vattr.va_mode)
+				mode = VNOVAL;
+		}
+		else
+			mode = VNOVAL;
+		VATTR_NULL(&vattr);
+		vattr.va_uid = SCARG(uap, uid);
+		vattr.va_gid = SCARG(uap, gid);
+		vattr.va_mode = mode;
+		error = VOP_SETATTR(vp, &vattr, p->p_ucred, p);
+	}
+out:
+	vput(vp);
+	return (error);
+}
+
+/*
  * Set ownership given a file descriptor.
  */
 /* ARGSUSED */