/*===========================================================================*
* do_rename *
*===========================================================================*/
int do_rename()
{
/* Perform the rename(name1, name2) system call. */
int r = 0, r1;
size_t len;
struct vnode *old_dirp, *new_dirp, *vp;
char old_name[PATH_MAX+1];
/* See if 'name1' (existing file) exists. Get dir and file inodes. */
if (fetch_name(user_fullpath, PATH_MAX, m_in.name1) < 0) return(err_code);
if ((old_dirp = last_dir()) == NIL_VNODE) return(err_code);
/* If the sticky bit is set, only the owner of the file or a privileged
user is allowed to rename */
if((old_dirp->v_mode & S_ISVTX) == S_ISVTX) {
/* Look up inode of file to unlink to retrieve owner */
vp = advance(old_dirp, PATH_RET_SYMLINK);
if (vp != NIL_VNODE) {
if(vp->v_uid != fp->fp_effuid && fp->fp_effuid != SU_UID)
r = -EPERM;
put_vnode(vp);
} else
r = err_code;
if (r != 0) {
put_vnode(old_dirp);
return(r);
}
}
/* Save the last component of the old name */
if(strlen(user_fullpath) >= sizeof(old_name)) {
put_vnode(old_dirp);
return(-ENAMETOOLONG);
}
strcpy(old_name, user_fullpath);
/* See if 'name2' (new name) exists. Get dir inode */
if (fetch_name(user_fullpath, PATH_MAX, m_in.name2) < 0)
r = err_code;
else if ((new_dirp = last_dir()) == NIL_VNODE)
r = err_code;
if (r != 0) {
put_vnode(old_dirp);
return r;
}
/* Both parent directories must be on the same device. */
if(old_dirp->v_fs_e != new_dirp->v_fs_e) r = -EXDEV;
/* Parent dirs must be writable, searchable and on a writable device */
if ((r1 = forbidden(old_dirp, W_BIT|X_BIT)) != 0 ||
(r1 = forbidden(new_dirp, W_BIT|X_BIT)) != 0) r = r1;
if(r == 0)
r = req_rename(old_dirp->v_fs_e, old_dirp->v_inode_nr, old_name,
new_dirp->v_inode_nr, user_fullpath);
put_vnode(old_dirp);
put_vnode(new_dirp);
return(r);
}
/*===========================================================================*
* do_rename *
*===========================================================================*/
PUBLIC int do_rename()
{
/* Perform the rename(name1, name2) system call. */
int r;
int old_dir_inode;
int old_fs_e;
int new_dir_inode;
int new_fs_e;
size_t len;
struct vnode *vp_od, *vp_nd;
char old_name[PATH_MAX+1];
/* See if 'name1' (existing file) exists. Get dir and file inodes. */
if (fetch_name(m_in.name1, m_in.name1_length, M1) != OK) return(err_code);
/* Request lookup */
if ((r = lookup_lastdir(0 /*!use_realuid*/, &vp_od)) != OK) return r;
r= forbidden(vp_od, W_BIT|X_BIT, 0 /*!use_realuid*/);
if (r != OK)
{
put_vnode(vp_od);
return r;
}
/* Remeber FS endpoint */
old_fs_e = vp_od->v_fs_e;
/* Save the last component of the old name */
len= strlen(user_fullpath);
if (len >= sizeof(old_name))
{
put_vnode(vp_od);
return ENAMETOOLONG;
}
memcpy(old_name, user_fullpath, len+1);
/* See if 'name2' (new name) exists. Get dir inode */
if (fetch_name(m_in.name2, m_in.name2_length, M1) != OK)
{
put_vnode(vp_od);
return err_code;
}
/* Request lookup */
r = lookup_lastdir(0 /*!use_realuid*/, &vp_nd);
if (r != OK)
{
put_vnode(vp_od);
return r;
}
r= forbidden(vp_nd, W_BIT|X_BIT, 0 /*!use_realuid*/);
if (r != OK)
{
put_vnode(vp_od);
put_vnode(vp_nd);
return r;
}
/* Remeber FS endpoint */
new_fs_e = vp_nd->v_fs_e;
/* Both parent directories must be on the same device. */
if (old_fs_e != new_fs_e)
{
put_vnode(vp_od);
put_vnode(vp_nd);
return EXDEV;
}
/* Issue request */
r= req_rename(old_fs_e, vp_od->v_inode_nr, old_name, vp_nd->v_inode_nr,
user_fullpath);
put_vnode(vp_od);
put_vnode(vp_nd);
return r;
}
