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1 : : /* Checking macros for poll functions.
2 : : Copyright (C) 2012 Free Software Foundation, Inc.
3 : : This file is part of the GNU C Library.
4 : :
5 : : The GNU C Library is free software; you can redistribute it and/or
6 : : modify it under the terms of the GNU Lesser General Public
7 : : License as published by the Free Software Foundation; either
8 : : version 2.1 of the License, or (at your option) any later version.
9 : :
10 : : The GNU C Library is distributed in the hope that it will be useful,
11 : : but WITHOUT ANY WARRANTY; without even the implied warranty of
12 : : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 : : Lesser General Public License for more details.
14 : :
15 : : You should have received a copy of the GNU Lesser General Public
16 : : License along with the GNU C Library; if not, see
17 : : <http://www.gnu.org/licenses/>. */
18 : :
19 : : #ifndef _SYS_POLL_H
20 : : # error "Never include <bits/poll2.h> directly; use <sys/poll.h> instead."
21 : : #endif
22 : :
23 : :
24 : : __BEGIN_DECLS
25 : :
26 : : extern int __REDIRECT (__poll_alias, (struct pollfd *__fds, nfds_t __nfds,
27 : : int __timeout), poll);
28 : : extern int __poll_chk (struct pollfd *__fds, nfds_t __nfds, int __timeout,
29 : : __SIZE_TYPE__ __fdslen);
30 : : extern int __REDIRECT (__poll_chk_warn, (struct pollfd *__fds, nfds_t __nfds,
31 : : int __timeout, __SIZE_TYPE__ __fdslen),
32 : : __poll_chk)
33 : : __warnattr ("poll called with fds buffer too small file nfds entries");
34 : :
35 : : __fortify_function int
36 : : poll (struct pollfd *__fds, nfds_t __nfds, int __timeout)
37 : : {
38 : : if (__bos (__fds) != (__SIZE_TYPE__) -1)
39 : : {
40 : : if (! __builtin_constant_p (__nfds))
41 : : return __poll_chk (__fds, __nfds, __timeout, __bos (__fds));
42 : : else if (__bos (__fds) / sizeof (*__fds) < __nfds)
43 : : return __poll_chk_warn (__fds, __nfds, __timeout, __bos (__fds));
44 : : }
45 : :
46 : 16 : return __poll_alias (__fds, __nfds, __timeout);
47 : : }
48 : :
49 : :
50 : : #ifdef __USE_GNU
51 : : extern int __REDIRECT (__ppoll_alias, (struct pollfd *__fds, nfds_t __nfds,
52 : : const struct timespec *__timeout,
53 : : const __sigset_t *__ss), ppoll);
54 : : extern int __ppoll_chk (struct pollfd *__fds, nfds_t __nfds,
55 : : const struct timespec *__timeout,
56 : : const __sigset_t *__ss, __SIZE_TYPE__ __fdslen);
57 : : extern int __REDIRECT (__ppoll_chk_warn, (struct pollfd *__fds, nfds_t __nfds,
58 : : const struct timespec *__timeout,
59 : : const __sigset_t *__ss,
60 : : __SIZE_TYPE__ __fdslen),
61 : : __ppoll_chk)
62 : : __warnattr ("ppoll called with fds buffer too small file nfds entries");
63 : :
64 : : __fortify_function int
65 : : ppoll (struct pollfd *__fds, nfds_t __nfds, const struct timespec *__timeout,
66 : : const __sigset_t *__ss)
67 : : {
68 : : if (__bos (__fds) != (__SIZE_TYPE__) -1)
69 : : {
70 : : if (! __builtin_constant_p (__nfds))
71 : : return __ppoll_chk (__fds, __nfds, __timeout, __ss, __bos (__fds));
72 : : else if (__bos (__fds) / sizeof (*__fds) < __nfds)
73 : : return __ppoll_chk_warn (__fds, __nfds, __timeout, __ss,
74 : : __bos (__fds));
75 : : }
76 : :
77 : : return __ppoll_alias (__fds, __nfds, __timeout, __ss);
78 : : }
79 : : #endif
80 : :
81 : : __END_DECLS
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