1 files changed, 102 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/common/__rt_sigwaitinfo.c b/libc/sysdeps/linux/common/__rt_sigwaitinfo.c
new file mode 100644
index 000000000..c8953bfbc
--- /dev/null
+++ b/libc/sysdeps/linux/common/__rt_sigwaitinfo.c
@@ -0,0 +1,102 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * __rt_sigwaitinfo() for uClibc
+ *
+ * Copyright (C) 2006 by Steven Hill <sjhill@realitydiluted.com>
+ * Copyright (C) 2000-2004 by Erik Andersen <andersen@codepoet.org>
+ *
+ * GNU Library General Public License (LGPL) version 2 or later.
+ */
+
+#include <sys/syscall.h>
+#include <signal.h>
+#include <string.h>
+
+libc_hidden_proto(memcpy)
+
+#ifdef __NR_rt_sigtimedwait
+
+#include <string.h>
+
+# ifdef __UCLIBC_HAS_THREADS_NATIVE__
+#  include <sysdep-cancel.h>
+
+static int do_sigwaitinfo(const sigset_t *set, siginfo_t *info)
+{
+#  ifdef SIGCANCEL
+	sigset_t tmpset;
+
+	if (set != NULL && (__builtin_expect (__sigismember (set, SIGCANCEL), 0)
+#   ifdef SIGSETXID
+		|| __builtin_expect (__sigismember (set, SIGSETXID), 0)
+#   endif
+		))
+	{
+		/* Create a temporary mask without the bit for SIGCANCEL set.  */
+		// We are not copying more than we have to.
+		memcpy (&tmpset, set, _NSIG / 8);
+		__sigdelset (&tmpset, SIGCANCEL);
+#   ifdef SIGSETXID
+		__sigdelset (&tmpset, SIGSETXID);
+#   endif
+		set = &tmpset;
+	}
+#  endif
+
+	/* XXX The size argument hopefully will have to be changed to the
+	   real size of the user-level sigset_t.  */
+	int result = INLINE_SYSCALL (rt_sigtimedwait, 4, set, info,
+								 NULL, _NSIG / 8);
+
+	/* The kernel generates a SI_TKILL code in si_code in case tkill is
+	   used.  tkill is transparently used in raise().  Since having
+	   SI_TKILL as a code is useful in general we fold the results
+	   here.  */
+	if (result != -1 && info != NULL && info->si_code == SI_TKILL)
+		info->si_code = SI_USER;
+
+	return result;
+}
+
+/* Return any pending signal or wait for one for the given time.  */
+int __sigwaitinfo(const sigset_t *set, siginfo_t *info)
+{
+	if(SINGLE_THREAD_P)
+		return do_sigwaitinfo(set, info);
+
+	int oldtype = LIBC_CANCEL_ASYNC();
+
+	/* XXX The size argument hopefully will have to be changed to the
+	   real size of the user-level sigset_t.  */
+	int result = do_sigwaitinfo(set, info);
+
+	LIBC_CANCEL_RESET(oldtype);
+
+	return result;
+}
+# else
+#  define __need_NULL
+#  include <stddef.h>
+#  define __NR___rt_sigwaitinfo __NR_rt_sigtimedwait
+static _syscall4(int, __rt_sigwaitinfo, const sigset_t *, set,
+				 siginfo_t *, info, const struct timespec *, timeout,
+				 size_t, setsize);
+
+int attribute_hidden __sigwaitinfo(const sigset_t * set, siginfo_t * info)
+{
+	return __rt_sigwaitinfo(set, info, NULL, _NSIG / 8);
+}
+# endif
+#else
+int attribute_hidden __sigwaitinfo(const sigset_t * set, siginfo_t * info)
+{
+	if (set == NULL)
+		__set_errno(EINVAL);
+	else
+		__set_errno(ENOSYS);
+	return -1;
+}
+#endif
+libc_hidden_proto(sigwaitinfo)
+weak_alias (__sigwaitinfo, sigwaitinfo)
+libc_hidden_weak(sigwaitinfo)