libio/stdfiles.c

   1 /* Copyright (C) 1993-2021 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.
  17
  18    As a special exception, if you link the code in this file with
  19    files compiled with a GNU compiler to produce an executable,
  20    that does not cause the resulting executable to be covered by
  21    the GNU Lesser General Public License.  This exception does not
  22    however invalidate any other reasons why the executable file
  23    might be covered by the GNU Lesser General Public License.
  24    This exception applies to code released by its copyright holders
  25    in files containing the exception.  */
  26
  27
  28 /* This file provides definitions of _IO_2_1_stdin_, _IO_2_1_stdout_,
  29    and _IO_2_1_stderr_, the default values of stdin, stdout, stderr.
  30    See oldstdfiles.c for glibc 2.0 legacy definitions without wide
  31    character support.  */
  32
  33 #include "libioP.h"
  34
  35 #ifdef _IO_MTSAFE_IO
  36 # define DEF_STDFILE(NAME, FD, CHAIN, FLAGS) \
  37   static _IO_lock_t _IO_stdfile_##FD##_lock = _IO_lock_initializer; \
  38   static struct _IO_wide_data _IO_wide_data_##FD \
  39     = { ._wide_vtable = &_IO_wfile_jumps }; \
  40   struct _IO_FILE_plus NAME \
  41     = {FILEBUF_LITERAL(CHAIN, FLAGS, FD, &_IO_wide_data_##FD), \
  42        &_IO_file_jumps};
  43 #else
  44 # define DEF_STDFILE(NAME, FD, CHAIN, FLAGS) \
  45   static struct _IO_wide_data _IO_wide_data_##FD \
  46     = { ._wide_vtable = &_IO_wfile_jumps }; \
  47   struct _IO_FILE_plus NAME \
  48     = {FILEBUF_LITERAL(CHAIN, FLAGS, FD, &_IO_wide_data_##FD), \
  49        &_IO_file_jumps};
  50 #endif
  51
  52 DEF_STDFILE(_IO_2_1_stdin_, 0, 0, _IO_NO_WRITES);
  53 DEF_STDFILE(_IO_2_1_stdout_, 1, &_IO_2_1_stdin_, _IO_NO_READS);
  54 DEF_STDFILE(_IO_2_1_stderr_, 2, &_IO_2_1_stdout_, _IO_NO_READS+_IO_UNBUFFERED);
  55
  56 struct _IO_FILE_plus *_IO_list_all = &_IO_2_1_stderr_;
  57 libc_hidden_data_def (_IO_list_all)