1  /* Uncancelable versions of cancelable interfaces.  Linux/NPTL version.
       2     Copyright (C) 2003-2023 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  /* Uncancelable fcntl.  */
      56  __typeof (__fcntl) __fcntl64_nocancel;
      57  
      58  #if IS_IN (libc) || IS_IN (rtld)
      59  hidden_proto (__open_nocancel)
      60  hidden_proto (__open64_nocancel)
      61  hidden_proto (__openat_nocancel)
      62  hidden_proto (__openat64_nocancel)
      63  hidden_proto (__read_nocancel)
      64  hidden_proto (__pread64_nocancel)
      65  hidden_proto (__write_nocancel)
      66  hidden_proto (__close_nocancel)
      67  hidden_proto (__fcntl64_nocancel)
      68  #endif
      69  
      70  /* Non cancellable close syscall that does not also set errno in case of
      71     failure.  */
      72  static inline void
      73  __close_nocancel_nostatus (int fd)
      74  {
      75    __close_nocancel (fd);
      76  }
      77  
      78  /* Non cancellable writev syscall that does not also set errno in case of
      79     failure.  */
      80  static inline void
      81  __writev_nocancel_nostatus (int fd, const struct iovec *iov, int iovcnt)
      82  {
      83    INTERNAL_SYSCALL_CALL (writev, fd, iov, iovcnt);
      84  }
      85  
      86  static inline ssize_t
      87  __getrandom_nocancel (void *buf, size_t buflen, unsigned int flags)
      88  {
      89    return INTERNAL_SYSCALL_CALL (getrandom, buf, buflen, flags);
      90  }
      91  
      92  static inline int
      93  __poll_infinity_nocancel (struct pollfd *fds, nfds_t nfds)
      94  {
      95    return INLINE_SYSCALL_CALL (ppoll, fds, nfds, NULL, NULL, 0);
      96  }
      97  
      98  #endif /* NOT_CANCEL_H  */