1  /* Message-writing for the dynamic linker.  Linux version.
       2     Copyright (C) 2013-2023 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  #include <sys/uio.h>
      20  #include <sysdep.h>
      21  
      22  /* This is used from only one place: dl-misc.c:_dl_debug_vdprintf.
      23     Hence it's in a header with the expectation it will be inlined.
      24  
      25     This is writev, but with a constraint added and others loosened:
      26  
      27     1. Under RTLD_PRIVATE_ERRNO, it must not clobber the private errno
      28        when another thread holds the dl_load_lock.
      29     2. It is not obliged to detect and report errors at all.
      30     3. It's not really obliged to deliver a single atomic write
      31        (though it may be preferable).  */
      32  
      33  static inline void
      34  _dl_writev (int fd, const struct iovec *iov, size_t niov)
      35  {
      36    INTERNAL_SYSCALL_CALL (writev, fd, iov, niov);
      37  }