1/* Uncancelable versions of cancelable interfaces. Linux/NPTL version.
2 Copyright (C) 2003-2022 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 <https://www.gnu.org/licenses/>. */
18
19#ifndef NOT_CANCEL_H
20# define NOT_CANCEL_H
21
22#include <fcntl.h>
23#include <sysdep.h>
24#include <errno.h>
25#include <unistd.h>
26#include <sys/poll.h>
27#include <sys/syscall.h>
28#include <sys/wait.h>
29#include <time.h>
30
31/* Non cancellable open syscall. */
32__typeof (open) __open_nocancel;
33
34/* Non cancellable open syscall (LFS version). */
35__typeof (open64) __open64_nocancel;
36
37/* Non cancellable openat syscall. */
38__typeof (openat) __openat_nocancel;
39
40/* Non cacellable openat syscall (LFS version). */
41__typeof (openat64) __openat64_nocancel;
42
43/* Non cancellable read syscall. */
44__typeof (__read) __read_nocancel;
45
46/* Non cancellable pread syscall (LFS version). */
47__typeof (__pread64) __pread64_nocancel;
48
49/* Uncancelable write. */
50__typeof (__write) __write_nocancel;
51
52/* Uncancelable close. */
53__typeof (__close) __close_nocancel;
54
55/* Non cancellable close syscall that does not also set errno in case of
56 failure. */
57static inline void
58__close_nocancel_nostatus (int fd)
59{
60 __close_nocancel (fd);
61}
62
63/* Non cancellable writev syscall that does not also set errno in case of
64 failure. */
65static inline void
66__writev_nocancel_nostatus (int fd, const struct iovec *iov, int iovcnt)
67{
68 INTERNAL_SYSCALL_CALL (writev, fd, iov, iovcnt);
69}
70
71static inline int
72__getrandom_nocancel (void *buf, size_t buflen, unsigned int flags)
73{
74 return INLINE_SYSCALL_CALL (getrandom, buf, buflen, flags);
75}
76
77static inline int
78__poll_infinity_nocancel (struct pollfd *fds, nfds_t nfds)
79{
80 return INLINE_SYSCALL_CALL (ppoll, fds, nfds, NULL, NULL, 0);
81}
82
83/* Uncancelable fcntl. */
84__typeof (__fcntl) __fcntl64_nocancel;
85
86#if IS_IN (libc) || IS_IN (rtld)
87hidden_proto (__open_nocancel)
88hidden_proto (__open64_nocancel)
89hidden_proto (__openat_nocancel)
90hidden_proto (__openat64_nocancel)
91hidden_proto (__read_nocancel)
92hidden_proto (__pread64_nocancel)
93hidden_proto (__write_nocancel)
94hidden_proto (__close_nocancel)
95hidden_proto (__fcntl64_nocancel)
96#endif
97
98#endif /* NOT_CANCEL_H */
99