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/*
This file is part of gnunet-fuse.
Copyright (C) 2012 Christian Grothoff (and other contributing authors)
gnunet-fuse 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 3, or (at your
option) any later version.
gnunet-fuse 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* open.c - FUSE open function
*
* Created on: Mar 14, 2012
* Author: mg
*
* File open operation
*
* No creation (O_CREAT, O_EXCL) and by default also no
* truncation (O_TRUNC) flags will be passed to open(). If an
* application specifies O_TRUNC, fuse first calls truncate()
* and then open(). Only if 'atomic_o_trunc' has been
* specified and kernel version is 2.6.24 or later, O_TRUNC is
* passed on to open.
*
* Unless the 'default_permissions' mount option is given,
* open should check if the operation is permitted for the
* given flags. Optionally open may also return an arbitrary
* filehandle in the fuse_file_info structure, which will be
* passed to all file operations.
*
* Changed in version 2.2
*/
/**
* @file fuse/open.c
* @brief opening files
* @author Christian Grothoff
*/
#include "gnunet-fuse.h"
#include "gfs_download.h"
int
gn_open (const char *path, struct fuse_file_info *fi)
{
struct GNUNET_FUSE_PathInfo *pi;
int eno;
pi = GNUNET_FUSE_path_info_get (path, &eno);
if (NULL == pi)
return - eno;
/* NOTE: once we allow writes, we need to keep the RC
incremented until close... */
GNUNET_FUSE_path_info_done (pi);
if (O_RDONLY != (fi->flags & 3))
return - EACCES;
return 0;
}
/* end of open.c */
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