1  /* Uncancelable versions of cancelable interfaces.  Hurd 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 <unistd.h>
      24  #include <poll.h>
      25  #include <sys/wait.h>
      26  #include <time.h>
      27  #include <sys/uio.h>
      28  #include <sys/random.h>
      29  #include <hurd.h>
      30  #include <hurd/fd.h>
      31  
      32  /* Non cancellable close syscall.  */
      33  __typeof (__close) __close_nocancel;
      34  
      35  void __close_nocancel_nostatus (int fd);
      36  
      37  /* Non cancellable open syscall.  */
      38  __typeof (__open) __open_nocancel;
      39  /* open64 is just the same as open for us.  */
      40  #define __open64_nocancel(...) \
      41    __open_nocancel (__VA_ARGS__)
      42  
      43  /* Non cancellable openat syscall.  */
      44  __typeof (__openat) __openat_nocancel;
      45  /* open64 is just the same as open for us.  */
      46  #define __openat64_nocancel(...) \
      47    __openat_nocancel (__VA_ARGS__)
      48  
      49  /* Non cancellable read syscall.  */
      50  __typeof (__read) __read_nocancel;
      51  
      52  /* Non cancellable pread syscall (LFS version).  */
      53  __typeof (__pread64) __pread64_nocancel;
      54  
      55  /* Non cancellable write syscall.  */
      56  __typeof (__write) __write_nocancel;
      57  
      58  /* Non cancellable pwrite syscall (LFS version).  */
      59  __typeof (__pwrite64) __pwrite64_nocancel;
      60  
      61  /* Non cancellable writev syscall.  */
      62  __typeof (__writev) __writev_nocancel;
      63  
      64  /* Non cancellable writev syscall with no status.  */
      65  void __writev_nocancel_nostatus (int fd, const struct iovec *vector, int count);
      66  
      67  /* Non cancellable wait4 syscall.  */
      68  __typeof (__wait4) __wait4_nocancel;
      69  
      70  # define __waitpid_nocancel(pid, stat_loc, options) \
      71    __wait4_nocancel (pid, stat_loc, options, NULL)
      72  
      73  /* Non cancellable fcntl syscall.  */
      74  __typeof (__fcntl) __fcntl_nocancel;
      75  /* fcntl64 is just the same as fcntl for us.  */
      76  #define __fcntl64_nocancel(...) \
      77    __fcntl_nocancel (__VA_ARGS__)
      78  
      79  static inline ssize_t
      80  __getrandom_nocancel (void *buf, size_t buflen, unsigned int flags)
      81  {
      82    int save_errno = errno;
      83    ssize_t r = __getrandom (buf, buflen, flags);
      84    r = r == -1 ? -errno : r;
      85    __set_errno (save_errno);
      86    return r;
      87  }
      88  
      89  #define __poll_infinity_nocancel(fds, nfds) \
      90    __poll (fds, nfds, -1)
      91  
      92  #if IS_IN (libc)
      93  hidden_proto (__close_nocancel)
      94  hidden_proto (__close_nocancel_nostatus)
      95  hidden_proto (__open_nocancel)
      96  hidden_proto (__openat_nocancel)
      97  hidden_proto (__read_nocancel)
      98  hidden_proto (__pread64_nocancel)
      99  hidden_proto (__write_nocancel)
     100  hidden_proto (__pwrite64_nocancel)
     101  hidden_proto (__writev_nocancel)
     102  hidden_proto (__writev_nocancel_nostatus)
     103  hidden_proto (__wait4_nocancel)
     104  hidden_proto (__fcntl_nocancel)
     105  #endif
     106  
     107  #endif /* NOT_CANCEL_H  */