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Enable kernel-internal symlink creation with do_sys_symlink(). 

I did this a while ago already, but can't remember why i didn't
commit it then.
This commit is contained in:
pooka 2010-06-30 15:44:54 +00:00
parent cdb0cb985d
commit 6376b2136c
2 changed files with 30 additions and 18 deletions
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45
sys/kern/vfs_syscalls.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: vfs_syscalls.c,v 1.406 2010/06/24 13:03:12 hannken Exp $ */
/* $NetBSD: vfs_syscalls.c,v 1.407 2010/06/30 15:44:54 pooka Exp $ */
/*-
* Copyright (c) 2008, 2009 The NetBSD Foundation, Inc.
@ -66,7 +66,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: vfs_syscalls.c,v 1.406 2010/06/24 13:03:12 hannken Exp $");
__KERNEL_RCSID(0, "$NetBSD: vfs_syscalls.c,v 1.407 2010/06/30 15:44:54 pooka Exp $");
#ifdef _KERNEL_OPT
#include "opt_fileassoc.h"
@ -2024,29 +2024,24 @@ out:
return (error);
}
/*
* Make a symbolic link.
*/
/* ARGSUSED */
int
sys_symlink(struct lwp *l, const struct sys_symlink_args *uap, register_t *retval)
do_sys_symlink(const char *patharg, const char *link, enum uio_seg seg)
{
/* {
syscallarg(const char *) path;
syscallarg(const char *) link;
} */
struct proc *p = l->l_proc;
struct proc *p = curproc;
struct vattr vattr;
char *path;
int error;
struct nameidata nd;
path = PNBUF_GET();
error = copyinstr(SCARG(uap, path), path, MAXPATHLEN, NULL);
if (error)
goto out;
NDINIT(&nd, CREATE, LOCKPARENT | TRYEMULROOT, UIO_USERSPACE,
SCARG(uap, link));
if (seg == UIO_USERSPACE) {
if ((error = copyinstr(patharg, path, MAXPATHLEN, NULL)) != 0)
goto out;
} else {
KASSERT(strlen(patharg) < MAXPATHLEN);
strcpy(path, patharg);
}
NDINIT(&nd, CREATE, LOCKPARENT | TRYEMULROOT, seg, link);
if ((error = namei(&nd)) != 0)
goto out;
if (nd.ni_vp) {
@ -2071,6 +2066,22 @@ out:
return (error);
}
/*
* Make a symbolic link.
*/
/* ARGSUSED */
int
sys_symlink(struct lwp *l, const struct sys_symlink_args *uap, register_t *retval)
{
/* {
syscallarg(const char *) path;
syscallarg(const char *) link;
} */
return do_sys_symlink(SCARG(uap, path), SCARG(uap, link),
UIO_USERSPACE);
}
/*
* Delete a whiteout from the filesystem.
*/

3
sys/sys/vfs_syscalls.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: vfs_syscalls.h,v 1.13 2009/08/09 22:49:00 haad Exp $ */
/* $NetBSD: vfs_syscalls.h,v 1.14 2010/06/30 15:44:55 pooka Exp $ */
/*
* Copyright (c) 2007, 2008, 2009 The NetBSD Foundation, Inc.
@ -65,6 +65,7 @@ int do_sys_rename(const char *, const char *, enum uio_seg, int);
int do_sys_mknod(struct lwp *, const char *, mode_t, dev_t, register_t *,
enum uio_seg);
int do_sys_mkdir(const char *, mode_t, enum uio_seg);
int do_sys_symlink(const char *, const char *, enum uio_seg);
int chdir_lookup(const char *, int, struct vnode **, struct lwp *);
void change_root(struct cwdinfo *, struct vnode *, struct lwp *);