| 1 | /* Set a file descriptor's mode to binary or to text.
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| 2 |
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| 3 | Copyright (C) 2001 Free Software Foundation, Inc.
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| 4 |
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| 5 | This program is free software; you can redistribute it and/or modify
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| 6 | it under the terms of the GNU General Public License as published by
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| 7 | the Free Software Foundation; either version 2, or (at your option)
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| 8 | any later version.
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| 9 |
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| 10 | This program is distributed in the hope that it will be useful,
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | GNU General Public License for more details.
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| 14 |
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| 15 | You should have received a copy of the GNU General Public License
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| 16 | along with this program; see the file COPYING.
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| 17 | If not, write to the Free Software Foundation,
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| 18 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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| 19 |
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| 20 | /* Written by Paul Eggert <eggert@twinsun.com> */
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| 21 |
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| 22 | #if HAVE_CONFIG_H
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| 23 | # include <config.h>
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| 24 | #endif
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| 25 |
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| 26 | #if HAVE_STDBOOL_H
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| 27 | # include <stdbool.h>
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| 28 | #else
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| 29 | typedef enum {false = 0, true = 1} bool;
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| 30 | #endif
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| 31 |
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| 32 | #if HAVE_SETMODE_DOS
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| 33 | # include <io.h>
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| 34 | # if HAVE_FCNTL_H
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| 35 | # include <fcntl.h>
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| 36 | # endif
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| 37 | # if HAVE_UNISTD_H
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| 38 | # include <unistd.h>
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| 39 | # endif
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| 40 | #endif
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| 41 |
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| 42 | #include "setmode.h"
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| 43 | #undef set_binary_mode
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| 44 |
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| 45 |
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| 46 | /* Set the binary mode of FD to MODE, returning its previous mode.
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| 47 | MODE is 1 for binary and 0 for text. If setting the mode might
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| 48 | cause problems, ignore the request and return MODE. Always return
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| 49 | 1 on POSIX platforms, which do not distinguish between text and
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| 50 | binary. */
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| 51 |
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| 52 | bool
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| 53 | set_binary_mode (int fd, bool mode)
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| 54 | {
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| 55 | #if HAVE_SETMODE_DOS
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| 56 | if (isatty (fd))
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| 57 | return mode;
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| 58 | return setmode (fd, mode ? O_BINARY : O_TEXT) != O_TEXT;
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| 59 | #else
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| 60 | return 1;
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| 61 | #endif
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| 62 | }
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