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-rw-r--r--lib/isc/unix/keyboard.c121
1 files changed, 121 insertions, 0 deletions
diff --git a/lib/isc/unix/keyboard.c b/lib/isc/unix/keyboard.c
new file mode 100644
index 0000000..cb5f116
--- /dev/null
+++ b/lib/isc/unix/keyboard.c
@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+
+#include <config.h>
+
+#include <stdbool.h>
+
+#include <sys/param.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/uio.h>
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <termios.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#include <isc/keyboard.h>
+#include <isc/util.h>
+
+isc_result_t
+isc_keyboard_open(isc_keyboard_t *keyboard) {
+ int fd;
+ isc_result_t ret;
+ struct termios current_mode;
+
+ REQUIRE(keyboard != NULL);
+
+ fd = open("/dev/tty", O_RDONLY, 0);
+ if (fd < 0)
+ return (ISC_R_IOERROR);
+
+ keyboard->fd = fd;
+
+ if (tcgetattr(fd, &keyboard->saved_mode) < 0) {
+ ret = ISC_R_IOERROR;
+ goto errout;
+ }
+
+ current_mode = keyboard->saved_mode;
+
+ current_mode.c_iflag &=
+ ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
+ current_mode.c_oflag &= ~OPOST;
+ current_mode.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
+ current_mode.c_cflag &= ~(CSIZE|PARENB);
+ current_mode.c_cflag |= CS8;
+
+ current_mode.c_cc[VMIN] = 1;
+ current_mode.c_cc[VTIME] = 0;
+ if (tcsetattr(fd, TCSAFLUSH, &current_mode) < 0) {
+ ret = ISC_R_IOERROR;
+ goto errout;
+ }
+
+ keyboard->result = ISC_R_SUCCESS;
+
+ return (ISC_R_SUCCESS);
+
+ errout:
+ close (fd);
+
+ return (ret);
+}
+
+isc_result_t
+isc_keyboard_close(isc_keyboard_t *keyboard, unsigned int sleeptime) {
+ REQUIRE(keyboard != NULL);
+
+ if (sleeptime > 0 && keyboard->result != ISC_R_CANCELED)
+ (void)sleep(sleeptime);
+
+ (void)tcsetattr(keyboard->fd, TCSAFLUSH, &keyboard->saved_mode);
+ (void)close(keyboard->fd);
+
+ keyboard->fd = -1;
+
+ return (ISC_R_SUCCESS);
+}
+
+isc_result_t
+isc_keyboard_getchar(isc_keyboard_t *keyboard, unsigned char *cp) {
+ ssize_t cc;
+ unsigned char c;
+ cc_t *controlchars;
+
+ REQUIRE(keyboard != NULL);
+ REQUIRE(cp != NULL);
+
+ cc = read(keyboard->fd, &c, 1);
+ if (cc < 0) {
+ keyboard->result = ISC_R_IOERROR;
+ return (keyboard->result);
+ }
+
+ controlchars = keyboard->saved_mode.c_cc;
+ if (c == controlchars[VINTR] || c == controlchars[VQUIT]) {
+ keyboard->result = ISC_R_CANCELED;
+ return (keyboard->result);
+ }
+
+ *cp = c;
+
+ return (ISC_R_SUCCESS);
+}
+
+bool
+isc_keyboard_canceled(isc_keyboard_t *keyboard) {
+ return (keyboard->result == ISC_R_CANCELED);
+}