static int fn(void *d)
{
struct l4fdx_client *client = d;
int err;
err = sys_setregid(client->gid, client->gid);
err = sys_setreuid(client->uid, client->uid);
err = sys_setsid();
if (client->capname)
snprintf(current->comm, sizeof(current->comm),
"l4xfdx-%s", client->capname);
else
snprintf(current->comm, sizeof(current->comm),
"l4xfdx-%lx", client->cap >> L4_CAP_SHIFT);
current->comm[sizeof(current->comm) - 1] = 0;
set_user_nice(current, -20);
while (!should_stop || !list_empty(&client->req_list)) {
struct internal_request *r;
wait_event_interruptible(client->event,
!list_empty(&client->req_list)
|| should_stop);
r = pop_request(client->srv_obj);
switch (r->type) {
case L4FS_REQ_OPEN:
fn_open(client->srv_obj, r);
break;
case L4FS_REQ_READ:
fn_read(client->srv_obj, r);
break;
case L4FS_REQ_WRITE:
fn_write(client->srv_obj, r);
break;
case L4FS_REQ_CLOSE:
fn_close(client->srv_obj, r);
break;
case L4FS_REQ_FSTAT64:
fn_fstat64(client->srv_obj, r);
break;
default:
pr_err("l4fdx: Invalid type=%d\n", r->type);
break;
}
}
return 0;
}
/*
** fr_close
**
** Close a previously opened file.
**
** INPUT : *filehandle - pointer to the file descriptor
** RETURN: F_NOERR on success, other if error
*/
unsigned char fr_close ( F_FILE * filehandle )
{
unsigned char rc;
if( xSemaphoreTake( fs_lock_semaphore, F_MAX_LOCK_WAIT_TICKS ) == pdPASS )
{
rc = fn_close( filehandle );
xSemaphoreGive( fs_lock_semaphore );
}
else
{
rc = F_ERR_OS;
}
return rc;
}
/* Tries to detect whether FILE is a given type of file, by opening the file
and passing it to DETECT, and returns a detect_result. */
static enum detect_result
try_detect (const char *file_name, bool (*detect) (FILE *))
{
FILE *file;
bool is_type;
file = fn_open (file_name, "rb");
if (file == NULL)
{
msg (ME, _("An error occurred while opening `%s': %s."),
file_name, strerror (errno));
return ANY_ERROR;
}
is_type = detect (file);
fn_close (file_name, file);
return is_type ? ANY_YES : ANY_NO;
}
/****************************************************************************
*
* fn_truncate
*
* Open a file and set end of file
*
* INPUT: filename - name of the file
* filesize - required new size
* RETURN: NULL on error, otherwise file pointer
*
***************************************************************************/
F_FILE * fn_truncate ( const char * filename, long filesize )
{
F_FILE * f = fn_open( filename, "r+" );
unsigned char rc;
if ( f != NULL )
{
rc = _f_fseek( (long)gl_file.filesize );
if ( rc == F_NO_ERROR )
{
rc = _f_seteof( f, filesize );
}
if ( rc )
{
fn_close( f );
f = NULL;
}
}
return f;
} /* fn_truncate */
