2 This file is part of GNUnet.
3 (C) 2001, 2002, 2006 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
23 * @brief code for installing and uninstalling signal handlers
24 * @author Christian Grothoff
28 #include "gnunet_util_lib.h"
30 #define LOG(kind,...) GNUNET_log_from (kind, "util", __VA_ARGS__)
33 struct GNUNET_SIGNAL_Context
37 GNUNET_SIGNAL_Handler method;
40 struct sigaction oldsig;
45 GNUNET_SIGNAL_Handler w32_sigchld_handler = NULL;
48 struct GNUNET_SIGNAL_Context *
49 GNUNET_SIGNAL_handler_install (int signum, GNUNET_SIGNAL_Handler handler)
51 struct GNUNET_SIGNAL_Context *ret;
57 ret = GNUNET_malloc (sizeof (struct GNUNET_SIGNAL_Context));
59 ret->method = handler;
61 memset (&sig, 0, sizeof (sig));
62 sig.sa_handler = (void *) handler;
63 sigemptyset (&sig.sa_mask);
65 sig.sa_flags = SA_INTERRUPT; /* SunOS */
67 sig.sa_flags = SA_RESTART;
69 sigaction (signum, &sig, &ret->oldsig);
71 if (signum == GNUNET_SIGCHLD)
72 w32_sigchld_handler = handler;
75 __p_sig_fn_t sigret = signal (signum, (__p_sig_fn_t) handler);
77 if (sigret == SIG_ERR)
79 LOG (GNUNET_ERROR_TYPE_WARNING, _("signal (%d, %p) returned %d.\n"),
80 signum, handler, sigret);
88 GNUNET_SIGNAL_handler_uninstall (struct GNUNET_SIGNAL_Context *ctx)
93 sigemptyset (&sig.sa_mask);
94 sigaction (ctx->sig, &ctx->oldsig, &sig);