1  /* An interface to read() that reads all it is asked to read.
       2  
       3     Copyright (C) 2002, 2009-2023 Free Software Foundation, Inc.
       4  
       5     This file is free software: you can redistribute it and/or modify
       6     it under the terms of the GNU Lesser General Public License as
       7     published by the Free Software Foundation; either version 2.1 of the
       8     License, or (at your option) any later version.
       9  
      10     This file 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
      13     GNU Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public License
      16     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <stddef.h>
      19  
      20  /* Read COUNT bytes at BUF to descriptor FD, retrying if interrupted
      21     or if partial reads occur.  Return the number of bytes successfully
      22     read, setting errno if that is less than COUNT.  errno = 0 means EOF.  */
      23  extern size_t full_read (int fd, void *buf, size_t count);