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/*
* Copyright (C) 2013 The Android Open Source Project
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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
* COPYRIGHT OWNER OR CONTRIBUTORS 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.
*/
#include <sys/signalfd.h>
/* Despite the fact that our kernel headers define sigset_t explicitly
* as a 32-bit integer, the kernel system call really expects a 64-bit
* bitmap for the signal set, or more exactly an array of two-32-bit
* values (see $KERNEL/arch/$ARCH/include/asm/signal.h for details).
*
* Unfortunately, we cannot fix the sigset_t definition without breaking
* the C library ABI, so perform a little runtime translation here.
*/
typedef union {
sigset_t bionic;
uint32_t kernel[2];
} kernel_sigset_t;
extern "C" int signalfd4(int fd, kernel_sigset_t *mask, size_t sizemask, int flags);
int signalfd(int fd, const sigset_t *mask, int flags)
{
kernel_sigset_t in_set;
in_set.kernel[0] = in_set.kernel[1] = 0;
in_set.bionic = *mask;
return signalfd4(fd, &in_set, sizeof(in_set), flags);
}
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