1  /* Synchronize I/O in given file descriptor.
       2     Copyright (C) 1997-2023 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  
      20  /* We use an UGLY hack to prevent gcc from finding us cheating.  The
      21     implementation of aio_fsync and aio_fsync64 are identical and so
      22     we want to avoid code duplication by using aliases.  But gcc sees
      23     the different parameter lists and prints a warning.  We define here
      24     a function so that aio_fsync64 has no prototype.  */
      25  #define aio_fsync64 XXX
      26  #include <aio.h>
      27  /* And undo the hack.  */
      28  #undef aio_fsync64
      29  #include <errno.h>
      30  #include <fcntl.h>
      31  
      32  #include <aio_misc.h>
      33  #include <shlib-compat.h>
      34  
      35  int
      36  __aio_fsync (int op, struct aiocb *aiocbp)
      37  {
      38    if (op != O_DSYNC && __builtin_expect (op != O_SYNC, 0))
      39      {
      40        __set_errno (EINVAL);
      41        return -1;
      42      }
      43  
      44    /* Verify that this is an open file descriptor.  */
      45    if (__glibc_unlikely (__fcntl (aiocbp->aio_fildes, F_GETFL) == -1))
      46      {
      47        __set_errno (EBADF);
      48        return -1;
      49      }
      50  
      51    return (__aio_enqueue_request ((aiocb_union *) aiocbp,
      52  				 op == O_SYNC ? LIO_SYNC : LIO_DSYNC) == NULL
      53  	  ? -1 : 0);
      54  }
      55  
      56  #if PTHREAD_IN_LIBC
      57  versioned_symbol (libc, __aio_fsync, aio_fsync, GLIBC_2_34);
      58  versioned_symbol (libc, __aio_fsync, aio_fsync64, GLIBC_2_34);
      59  # if OTHER_SHLIB_COMPAT (librt, GLIBC_2_1, GLIBC_2_34)
      60  compat_symbol (librt, __aio_fsync, aio_fsync, GLIBC_2_1);
      61  compat_symbol (librt, __aio_fsync, aio_fsync64, GLIBC_2_1);
      62  # endif
      63  #else /* !PTHREAD_IN_LIBC */
      64  strong_alias (__aio_fsync, aio_fsync)
      65  weak_alias (__aio_fsync, aio_fsync64)
      66  #endif /* !PTHREAD_IN_LIBC */