1 /* Binary mode I/O. 2 Copyright 2017-2020 Free Software Foundation, Inc. 3 4 This program is free software: you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 3 of the License, or 7 (at your option) any later version. 8 9 This program 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 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program. If not, see <https://www.gnu.org/licenses/>. */ 16 17 #include <config.h> 18 19 #define BINARY_IO_INLINE _GL_EXTERN_INLINE 20 #include "binary-io.h" 21 22 #if defined __DJGPP__ || defined __EMX__ 23 # include <unistd.h> 24 25 int 26 set_binary_mode (int fd, int mode) 27 { 28 if (isatty (fd)) 29 /* If FD refers to a console (not a pipe, not a regular file), 30 O_TEXT is the only reasonable mode, both on input and on output. 31 Silently ignore the request. If we were to return -1 here, 32 all programs that use xset_binary_mode would fail when run 33 with console input or console output. */ 34 return O_TEXT; 35 else 36 return __gl_setmode (fd, mode); 37 } 38 39 #endif 40