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/* This file contains open file and directory handle management functions.
*
* The entry points into this file are:
* get_handle open a handle for an inode and store the handle
* put_handle close any handles associated with an inode
*
* Created:
* April 2009 (D.C. van Moolenbroek)
*/
#include "inc.h"
#include <fcntl.h>
/*===========================================================================*
* get_handle *
*===========================================================================*/
int get_handle(struct inode *ino)
{
/* Get an open file or directory handle for an inode.
*/
char path[PATH_MAX];
int r;
/* If we don't have a file handle yet, try to open the file now. */
if (ino->i_flags & I_HANDLE)
return OK;
if ((r = verify_inode(ino, path, NULL)) != OK)
return r;
if (IS_DIR(ino)) {
r = sffs_table->t_opendir(path, &ino->i_dir);
}
else {
if (!read_only)
r = sffs_table->t_open(path, O_RDWR, 0, &ino->i_file);
/* Protection or mount status might prevent us from writing. With the
* information that we have available, this is the best we can do..
*/
if (read_only || r != OK)
r = sffs_table->t_open(path, O_RDONLY, 0, &ino->i_file);
}
if (r != OK)
return r;
ino->i_flags |= I_HANDLE;
return OK;
}
/*===========================================================================*
* put_handle *
*===========================================================================*/
void put_handle(struct inode *ino)
{
/* Close an open file or directory handle associated with an inode.
*/
int r;
if (!(ino->i_flags & I_HANDLE))
return;
/* We ignore any errors here, because we can't deal with them anyway. */
if (IS_DIR(ino))
r = sffs_table->t_closedir(ino->i_dir);
else
r = sffs_table->t_close(ino->i_file);
if (r != OK)
printf("%s: put_handle: handle close operation returned %d\n",
sffs_name, r);
ino->i_flags &= ~I_HANDLE;
}
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