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/* statusfd.c - SCdaemon status fd handling
* Copyright (C) 2007 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG 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 of the License, or
* (at your option) any later version.
*
* GnuPG 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, see <http://www.gnu.org/licenses/>.
*/
/* AUTHOR: Moritz Schulte <[email protected]>. */
#include <config.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pth.h>
#include "scdaemon.h"
#include "statusfd.h"
struct statusfd_s
{
FILE *stream;
struct statusfd_s *next, **prevp;
};
typedef struct statusfd_s *statusfd_t;
static statusfd_t statusfd_list;
static int
statusfd_add (FILE *stream)
{
statusfd_t statusfd_obj;
int rc;
statusfd_obj = xtrymalloc (sizeof (*statusfd_obj));
if (statusfd_obj)
{
statusfd_obj->stream = stream;
statusfd_obj->next = statusfd_list;
statusfd_obj->prevp = &statusfd_list;
if (statusfd_list)
statusfd_list->prevp = &statusfd_obj->next;
statusfd_list = statusfd_obj;
rc = 0;
}
else
rc = gpg_error_from_syserror ();
return rc;
}
static void
statusfd_remove (statusfd_t statusfd)
{
*statusfd->prevp = statusfd->next;
if (statusfd->next)
statusfd->next->prevp = statusfd->prevp;
xfree (statusfd);
}
static void
statusfd_broadcast (const char *fmt, ...)
{
statusfd_t statusfd = statusfd_list;
statusfd_t statusfd_next;
int ret;
va_list ap;
va_start (ap, fmt);
while (statusfd)
{
ret = vfprintf (statusfd->stream, fmt, ap);
if (ret >= 0)
ret = fflush (statusfd->stream);
if (ret < 0)
{
/* Error on this statusfd stream, remove it. */
/* FIXME: only remove on certain errros? -moritz */
statusfd_next = statusfd->next;
statusfd_remove (statusfd);
statusfd = statusfd_next;
continue;
}
statusfd = statusfd->next;
}
va_end (ap);
}
int
statusfd_register (int fd)
{
FILE *stream;
int rc;
stream = fdopen (fd, "a");
if (! stream)
rc = gpg_error_from_syserror ();
else
rc = statusfd_add (stream);
if (rc && stream)
fclose (stream);
return rc;
}
void
statusfd_event_card_inserted (int slot)
{
statusfd_broadcast ("CARD INSERTED\n");
}
void
statusfd_event_card_removed (int slot)
{
statusfd_broadcast ("CARD REMOVED\n");
}
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