libio/ioprims.c

   1 /*
   2 Copyright (C) 1993 Free Software Foundation
   3
   4 This file is part of the GNU IO Library.  This library is free
   5 software; you can redistribute it and/or modify it under the
   6 terms of the GNU General Public License as published by the
   7 Free Software Foundation; either version 2, or (at your option)
   8 any later version.
   9
  10 This 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
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this library; see the file COPYING.  If not, write to the Free
  17 Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 As a special exception, if you link this library with files
  20 compiled with a GNU compiler to produce an executable, this does not cause
  21 the resulting executable to be covered by the GNU General Public License.
  22 This exception does not however invalidate any other reasons why
  23 the executable file might be covered by the GNU General Public License. */
  24
  25 /* I/O OS-level primitives.
  26    Needs to be replaced if not using Unix.
  27    Also needs to be replaced if avoiding name-space pollution
  28    (in which case read would be defined in terms of _IO_read,
  29    rather than vice versa). */
  30
  31 #include "libioP.h"
  32 #include <sys/types.h>
  33 #include <sys/stat.h>
  34 #include <unistd.h>
  35
  36 #ifdef TODO
  37 /* Add open, isatty */
  38 #endif
  39
  40 _IO_ssize_t
  41 _IO_read (fildes, buf, nbyte)
  42      int fildes;
  43      void *buf;
  44      _IO_size_t nbyte;
  45 {
  46   return read (fildes, buf, nbyte);
  47 }
  48
  49 _IO_ssize_t
  50 _IO_write (fildes, buf, nbyte)
  51      int fildes;
  52      const void *buf;
  53      _IO_size_t nbyte;
  54 {
  55   return write (fildes, buf, nbyte);
  56 }
  57
  58 _IO_off_t
  59 _IO_lseek (fildes, offset, whence)
  60      int fildes;
  61      _IO_off_t offset;
  62      int whence;
  63 {
  64   return lseek (fildes, offset, whence);
  65 }
  66
  67 int
  68 _IO_close (fildes)
  69      int fildes;
  70 {
  71   return close (fildes);
  72 }
  73
  74 int
  75 _IO_fstat (fildes, buf)
  76      int fildes;
  77      struct stat *buf;
  78 {
  79   return fstat (fildes, buf);
  80 }