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b168057a | 1 | /* Copyright (C) 2007-2015 Free Software Foundation, Inc. |
34c2c092 UD |
2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
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17 | |
18 | #include <errno.h> | |
19 | #include <signal.h> | |
20 | #include <sys/signalfd.h> | |
21 | #include <sysdep.h> | |
aa7492d2 | 22 | #include <kernel-features.h> |
34c2c092 UD |
23 | |
24 | ||
25 | int | |
8e351378 | 26 | signalfd (int fd, const sigset_t *mask, int flags) |
34c2c092 | 27 | { |
bdcebfc4 | 28 | #ifdef __NR_signalfd4 |
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29 | int res = INLINE_SYSCALL (signalfd4, 4, fd, mask, _NSIG / 8, flags); |
30 | # ifndef __ASSUME_SIGNALFD4 | |
31 | if (res != -1 || errno != ENOSYS) | |
32 | # endif | |
33 | return res; | |
34 | #endif | |
35 | ||
36 | #ifndef __ASSUME_SIGNALFD4 | |
bdcebfc4 | 37 | /* The old system call has no flag parameter which is bad. So we have |
8e351378 UD |
38 | to wait until we have to support to pass additional values to the |
39 | kernel (sys_indirect) before implementing setting flags like | |
40 | O_NONBLOCK etc. */ | |
41 | if (flags != 0) | |
42 | { | |
43 | __set_errno (EINVAL); | |
44 | return -1; | |
45 | } | |
46 | ||
bdcebfc4 | 47 | # ifdef __NR_signalfd |
34c2c092 | 48 | return INLINE_SYSCALL (signalfd, 3, fd, mask, _NSIG / 8); |
bdcebfc4 | 49 | # else |
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50 | __set_errno (ENOSYS); |
51 | return -1; | |
bdcebfc4 | 52 | # endif |
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53 | #elif !defined __NR_signalfd4 |
54 | # error "__ASSUME_SIGNALFD4 defined but not __NR_signalfd4" | |
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55 | #endif |
56 | } |