1 files changed, 98 insertions, 0 deletions
diff --git a/src/util/signal.c b/src/util/signal.c
new file mode 100644
index 0000000..c3bb718
--- /dev/null
+++ b/src/util/signal.c
@@ -0,0 +1,98 @@
+/*
+     This file is part of GNUnet.
+     (C) 2001, 2002, 2006 Christian Grothoff (and other contributing authors)
+
+     GNUnet 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 2, or (at your
+     option) any later version.
+
+     GNUnet 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 GNUnet; see the file COPYING.  If not, write to the
+     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+     Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file util/signal.c
+ * @brief code for installing and uninstalling signal handlers
+ * @author Christian Grothoff
+ */
+
+#include "platform.h"
+#include "gnunet_common.h"
+#include "gnunet_signal_lib.h"
+
+#define LOG(kind,...) GNUNET_log_from (kind, "util", __VA_ARGS__)
+
+
+struct GNUNET_SIGNAL_Context
+{
+  int sig;
+
+  GNUNET_SIGNAL_Handler method;
+
+#ifndef MINGW
+  struct sigaction oldsig;
+#endif
+};
+
+#ifdef WINDOWS
+GNUNET_SIGNAL_Handler w32_sigchld_handler = NULL;
+#endif
+
+struct GNUNET_SIGNAL_Context *
+GNUNET_SIGNAL_handler_install (int signum, GNUNET_SIGNAL_Handler handler)
+{
+  struct GNUNET_SIGNAL_Context *ret;
+
+#ifndef MINGW
+  struct sigaction sig;
+#endif
+
+  ret = GNUNET_malloc (sizeof (struct GNUNET_SIGNAL_Context));
+  ret->sig = signum;
+  ret->method = handler;
+#ifndef MINGW
+  memset (&sig, 0, sizeof (sig));
+  sig.sa_handler = (void *) handler;
+  sigemptyset (&sig.sa_mask);
+#ifdef SA_INTERRUPT
+  sig.sa_flags = SA_INTERRUPT;  /* SunOS */
+#else
+  sig.sa_flags = SA_RESTART;
+#endif
+  sigaction (signum, &sig, &ret->oldsig);
+#else
+  if (signum == GNUNET_SIGCHLD)
+    w32_sigchld_handler = handler;
+  else
+  {
+    __p_sig_fn_t sigret = signal (signum, (__p_sig_fn_t) handler);
+
+    if (sigret == SIG_ERR)
+    {
+      LOG (GNUNET_ERROR_TYPE_WARNING, _("signal (%d, %p) returned %d.\n"),
+           signum, handler, sigret);
+    }
+  }
+#endif
+  return ret;
+}
+
+void
+GNUNET_SIGNAL_handler_uninstall (struct GNUNET_SIGNAL_Context *ctx)
+{
+#ifndef MINGW
+  struct sigaction sig;
+
+  sigemptyset (&sig.sa_mask);
+  sigaction (ctx->sig, &ctx->oldsig, &sig);
+#endif
+  GNUNET_free (ctx);
+}