| /* |
| * 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); |
| } |