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2007-08-16 Moritz Schulte <moritz@g10code.com> * command.c: Include "statusfd.h". (cmd_statusfd): New function. (register_commands): New entry for STATUSFD command. (update_reader_status_file): Call statusfd_event_card_inserted and statusfd_event_card_removed on events. (scd_command_handler): Pass flags=3 to assuan_init_socket_server_ext (enabling fd passing). * statusfd.c, statusfd.h: New files. * Makefile.am (scdaemon_SOURCES): Added statusfd.c, statusfd.h. * NOTES-STATUSFD: New file.
140 lines
2.7 KiB
C
140 lines
2.7 KiB
C
/* statusfd.c - SCdaemon status fd handling
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* Copyright (C) 2007 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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/* AUTHOR: Moritz Schulte <moritz@g10code.com>. */
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#include <config.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <pth.h>
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#include "scdaemon.h"
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#include "statusfd.h"
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struct statusfd_s
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{
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FILE *stream;
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struct statusfd_s *next, **prevp;
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};
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typedef struct statusfd_s *statusfd_t;
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static statusfd_t statusfd_list;
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static int
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statusfd_add (FILE *stream)
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{
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statusfd_t statusfd_obj;
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int rc;
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statusfd_obj = xtrymalloc (sizeof (*statusfd_obj));
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if (statusfd_obj)
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{
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statusfd_obj->stream = stream;
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statusfd_obj->next = statusfd_list;
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statusfd_obj->prevp = &statusfd_list;
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if (statusfd_list)
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statusfd_list->prevp = &statusfd_obj->next;
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statusfd_list = statusfd_obj;
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rc = 0;
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}
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else
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rc = gpg_error_from_syserror ();
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return rc;
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}
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static void
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statusfd_remove (statusfd_t statusfd)
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{
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*statusfd->prevp = statusfd->next;
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if (statusfd->next)
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statusfd->next->prevp = statusfd->prevp;
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xfree (statusfd);
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}
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static void
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statusfd_broadcast (const char *fmt, ...)
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{
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statusfd_t statusfd = statusfd_list;
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statusfd_t statusfd_next;
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int ret;
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va_list ap;
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va_start (ap, fmt);
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while (statusfd)
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{
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ret = vfprintf (statusfd->stream, fmt, ap);
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if (ret >= 0)
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ret = fflush (statusfd->stream);
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if (ret < 0)
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{
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/* Error on this statusfd stream, remove it. */
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/* FIXME: only remove on certain errros? -moritz */
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statusfd_next = statusfd->next;
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statusfd_remove (statusfd);
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statusfd = statusfd_next;
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continue;
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}
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statusfd = statusfd->next;
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}
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va_end (ap);
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}
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int
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statusfd_register (int fd)
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{
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FILE *stream;
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int rc;
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stream = fdopen (fd, "a");
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if (! stream)
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rc = gpg_error_from_syserror ();
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else
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rc = statusfd_add (stream);
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if (rc && stream)
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fclose (stream);
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return rc;
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}
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void
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statusfd_event_card_inserted (int slot)
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{
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statusfd_broadcast ("CARD INSERTED\n");
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}
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void
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statusfd_event_card_removed (int slot)
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{
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statusfd_broadcast ("CARD REMOVED\n");
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}
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