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Diffstat (limited to 'REORG.TODO/manual/examples/termios.c')
-rw-r--r-- | REORG.TODO/manual/examples/termios.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/REORG.TODO/manual/examples/termios.c b/REORG.TODO/manual/examples/termios.c new file mode 100644 index 0000000000..8ac2f626d5 --- /dev/null +++ b/REORG.TODO/manual/examples/termios.c @@ -0,0 +1,77 @@ +/* Noncanonical Mode Example + Copyright (C) 1991-2017 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License + as published by the Free Software Foundation; either version 2 + of the License, or (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, if not, see <http://www.gnu.org/licenses/>. +*/ + +#include <unistd.h> +#include <stdio.h> +#include <stdlib.h> +#include <termios.h> + +/* Use this variable to remember original terminal attributes. */ + +struct termios saved_attributes; + +void +reset_input_mode (void) +{ + tcsetattr (STDIN_FILENO, TCSANOW, &saved_attributes); +} + +void +set_input_mode (void) +{ + struct termios tattr; + char *name; + + /* Make sure stdin is a terminal. */ + if (!isatty (STDIN_FILENO)) + { + fprintf (stderr, "Not a terminal.\n"); + exit (EXIT_FAILURE); + } + + /* Save the terminal attributes so we can restore them later. */ + tcgetattr (STDIN_FILENO, &saved_attributes); + atexit (reset_input_mode); + +/*@group*/ + /* Set the funny terminal modes. */ + tcgetattr (STDIN_FILENO, &tattr); + tattr.c_lflag &= ~(ICANON|ECHO); /* Clear ICANON and ECHO. */ + tattr.c_cc[VMIN] = 1; + tattr.c_cc[VTIME] = 0; + tcsetattr (STDIN_FILENO, TCSAFLUSH, &tattr); +} +/*@end group*/ + +int +main (void) +{ + char c; + + set_input_mode (); + + while (1) + { + read (STDIN_FILENO, &c, 1); + if (c == '\004') /* @kbd{C-d} */ + break; + else + putchar (c); + } + + return EXIT_SUCCESS; +} |