Index: uspace/lib/posix/signal.h
===================================================================
--- uspace/lib/posix/signal.h	(revision 098eeba3fbd41163d8727c993d172dc9c7a19602)
+++ uspace/lib/posix/signal.h	(revision 098eeba3fbd41163d8727c993d172dc9c7a19602)
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2011 Jiri Zarevucky
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef POSIX_SIGNAL_H_
+#define POSIX_SIGNAL_H_
+
+#include <errno.h>
+
+/* HelenOS doesn't have signals, so calls to functions of this header
+ * are just replaced with their respective failure return value.
+ *
+ * Other macros and constants are here just to satisfy the symbol resolver
+ * and have no practical value whatsoever, until HelenOS implements some
+ * equivalent of signals. Maybe something neat based on IPC will be devised
+ * in the future?
+ */
+
+#define SIG_DFL ((void (*)(int)) 0)
+#define SIG_ERR ((void (*)(int)) 0)
+#define SIG_IGN ((void (*)(int)) 0)
+
+#define signal(sig,func) (errno = ENOTSUP, SIG_ERR)
+#define raise(sig) ((int)-1)
+
+typedef int sig_atomic_t;
+
+/* full POSIX set */
+enum {
+	SIGABRT,
+	SIGALRM,
+	SIGBUS,
+	SIGCHLD,
+	SIGCONT,
+	SIGFPE,
+	SIGHUP,
+	SIGILL,
+	SIGINT,
+	SIGKILL,
+	SIGPIPE,
+	SIGQUIT,
+	SIGSEGV,
+	SIGSTOP,
+	SIGTERM,
+	SIGTSTP,
+	SIGTTIN,
+	SIGTTOU,
+	SIGUSR1,
+	SIGUSR2,
+	SIGPOLL,
+	SIGPROF,
+	SIGSYS,
+	SIGTRAP,
+	SIGURG,
+	SIGVTALRM,
+	SIGXCPU,
+	SIGXFSZ
+};
+
+#endif /* POSIX_SIGNAL_H_ */
+