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/*
Copyright (C) 1994, 1995, 1996, 1997 Free Software Foundation
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "priv.h"
/* Clear the `.' and `..' entries from directory DP. Its parent is PDP,
and the user responsible for this is identified by CRED. Both
directories must be locked. */
error_t
diskfs_clear_directory (struct node *dp,
struct node *pdp,
struct protid *cred)
{
error_t err;
struct dirstat *ds = alloca (diskfs_dirstat_size);
struct node *np;
/* Find and remove the `.' entry. */
err = diskfs_lookup (dp, ".", REMOVE, &np, ds, cred);
assert (err != ENOENT);
if (!err)
{
assert (np == dp);
err = diskfs_dirremove (dp, np, ".", ds);
diskfs_nrele (np);
}
else
diskfs_drop_dirstat (dp, ds);
if (err)
return err;
/* Decrement the link count */
dp->dn_stat.st_nlink--;
dp->dn_set_ctime = 1;
/* Find and remove the `..' entry. */
err = diskfs_lookup (dp, "..", REMOVE | SPEC_DOTDOT, &np, ds, cred);
assert (err != ENOENT);
if (!err)
{
assert (np == pdp);
err = diskfs_dirremove (dp, np, "..", ds);
}
else
diskfs_drop_dirstat (dp, ds);
if (err)
return err;
/* Decrement the link count on the parent */
pdp->dn_stat.st_nlink--;
pdp->dn_set_ctime = 1;
diskfs_truncate (dp, 0);
return err;
}
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