[Feature][ZXW-33]merge ZXW 0428 version
Change-Id: I11f167edfea428d9fab198ff00ff1364932d1b0b
diff --git a/ap/libc/glibc/glibc-2.23/sysdeps/posix/sigset.c b/ap/libc/glibc/glibc-2.23/sysdeps/posix/sigset.c
new file mode 100644
index 0000000..765fe63
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/sysdeps/posix/sigset.c
@@ -0,0 +1,90 @@
+/* Copyright (C) 1998-2016 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, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#define __need_NULL
+#include <stddef.h>
+#include <signal.h>
+#include <string.h> /* For the real memset prototype. */
+
+
+/* Set the disposition for SIG. */
+__sighandler_t
+sigset (int sig, __sighandler_t disp)
+{
+ struct sigaction act;
+ struct sigaction oact;
+ sigset_t set;
+ sigset_t oset;
+
+#ifdef SIG_HOLD
+ /* Handle SIG_HOLD first. */
+ if (disp == SIG_HOLD)
+ {
+ /* Create an empty signal set. */
+ if (__sigemptyset (&set) < 0)
+ return SIG_ERR;
+
+ /* Add the specified signal. */
+ if (__sigaddset (&set, sig) < 0)
+ return SIG_ERR;
+
+ /* Add the signal set to the current signal mask. */
+ if (__sigprocmask (SIG_BLOCK, &set, &oset) < 0)
+ return SIG_ERR;
+
+ /* If the signal was already blocked signal this to the caller. */
+ if (__sigismember (&oset, sig))
+ return SIG_HOLD;
+
+ /* We need to determine whether a specific handler is installed. */
+ if (__sigaction (sig, NULL, &oact) < 0)
+ return SIG_ERR;
+
+ return oact.sa_handler;
+ }
+#endif /* SIG_HOLD */
+
+ /* Check signal extents to protect __sigismember. */
+ if (disp == SIG_ERR || sig < 1 || sig >= NSIG)
+ {
+ __set_errno (EINVAL);
+ return SIG_ERR;
+ }
+
+ act.sa_handler = disp;
+ if (__sigemptyset (&act.sa_mask) < 0)
+ return SIG_ERR;
+ act.sa_flags = 0;
+ if (__sigaction (sig, &act, &oact) < 0)
+ return SIG_ERR;
+
+ /* Create an empty signal set. */
+ if (__sigemptyset (&set) < 0)
+ return SIG_ERR;
+
+ /* Add the specified signal. */
+ if (__sigaddset (&set, sig) < 0)
+ return SIG_ERR;
+
+ /* Remove the signal set from the current signal mask. */
+ if (__sigprocmask (SIG_UNBLOCK, &set, &oset) < 0)
+ return SIG_ERR;
+
+ /* If the signal was already blocked return SIG_HOLD. */
+ return __sigismember (&oset, sig) ? SIG_HOLD : oact.sa_handler;
+}