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da2d1bc5 | 1 | /* Copyright (C) 1997, 1998 Free Software Foundation, Inc. |
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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 Library General Public License as | |
6 | published by the Free Software Foundation; either version 2 of the | |
7 | 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 | Library General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Library General Public | |
15 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
16 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
17 | Boston, MA 02111-1307, USA. */ | |
18 | ||
19 | #include <errno.h> | |
20 | #include <signal.h> | |
21 | #include <unistd.h> | |
22 | ||
23 | extern int __syscall_sigpending (sigset_t *); | |
24 | extern int __syscall_rt_sigpending (sigset_t *, size_t); | |
25 | ||
26 | ||
27 | /* The variable is shared between all wrappers around signal handling | |
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28 | functions which have RT equivalents. */ |
29 | int __libc_missing_rt_sigs; | |
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30 | |
31 | ||
32 | /* Change the set of blocked signals to SET, | |
33 | wait until a signal arrives, and restore the set of blocked signals. */ | |
34 | int | |
35 | sigpending (set) | |
36 | sigset_t *set; | |
37 | { | |
38 | /* First try the RT signals. */ | |
da2d1bc5 | 39 | if (!__libc_missing_rt_sigs) |
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40 | { |
41 | /* XXX The size argument hopefully will have to be changed to the | |
42 | real size of the user-level sigset_t. */ | |
d71b808a | 43 | int result = __syscall_rt_sigpending (set, _NSIG / 8); |
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44 | |
45 | if (result >= 0 || errno != ENOSYS) | |
46 | return result; | |
47 | ||
da2d1bc5 | 48 | __libc_missing_rt_sigs = 1; |
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49 | } |
50 | ||
51 | return __syscall_sigpending (set); | |
52 | } |