import sigqueueinfo() from glibc

libc/sysdeps/linux/common/sigqueue.c

@@ -0,0 +1,52 @@
+/* Copyright (C) 1997, 1998, 2000, 2003, 2005 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <signal.h>
+#include <unistd.h>
+#include <string.h>
+
+#include <sys/syscall.h>
+
+libc_hidden_proto(getpid)
+libc_hidden_proto(getuid)
+
+#ifdef __NR_rt_sigqueueinfo
+
+# define __NR___libc_rt_sigqueueinfo __NR_rt_sigqueueinfo
+static inline _syscall3(int, __libc_rt_sigqueueinfo, pid_t, pid, int, sig, void*, value);
+
+/* Return any pending signal or wait for one for the given time.  */
+int __sigqueue (pid_t pid, int sig, const union sigval val)
+{
+  siginfo_t info;
+
+  /* First, clear the siginfo_t structure, so that we don't pass our
+     stack content to other tasks.  */
+  memset (&info, 0, sizeof (siginfo_t));
+  /* We must pass the information about the data in a siginfo_t value.  */
+  info.si_signo = sig;
+  info.si_code = SI_QUEUE;
+  info.si_pid = getpid ();
+  info.si_uid = getuid ();
+  info.si_value = val;
+
+  return __libc_rt_sigqueueinfo(pid, sig, __ptrvalue (&info));
+}
+weak_alias (__sigqueue, sigqueue)
+#endif