* gpgkeys_ldap.c (main), gpgkeys_hkp.c (main), gpgkeys_http.c (main),

gpgkeys_finger.c (main): Call timeout functions before performing an
action that could block for a long time.

* ksutil.h, ksutil.c: New.  Right now just contains timeout functions.

keyserver/ksutil.c

@@ -0,0 +1,63 @@
+/* ksutil.c - general keyserver utility functions
+ * Copyright (C) 2004 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 2 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#include <config.h>
+#include <signal.h>
+#include <unistd.h>
+#include "keyserver.h"
+#include "ksutil.h"
+
+static void
+catch_alarm(int foo)
+{
+  _exit(KEYSERVER_TIMEOUT);
+}
+
+unsigned int
+set_timeout(unsigned int seconds)
+{
+#ifdef HAVE_DOSISH_SYSTEM
+  return 0;
+#else
+  return alarm(seconds);
+#endif
+}
+
+int
+register_timeout(void)
+{
+#ifdef HAVE_DOSISH_SYSTEM
+  return 0;
+#else
+#if defined(HAVE_SIGACTION) && defined(HAVE_STRUCT_SIGACTION)
+  struct sigaction act;
+
+  act.sa_handler=catch_alarm;
+  sigemptyset(&act.sa_mask);
+  act.sa_flags=0;
+  return sigaction(SIGALRM,&act,NULL);
+#else 
+  if(signal(SIGALRM,catch_alarm)==SIG_ERR)
+    return -1;
+  else
+    return 0;
+#endif
+#endif
+}