blob: 88d904b45aa0fae64560079194a6bc1baf1eac5b [file] [log] [blame]
/*
*
* Copyright (c) 2020 Project CHIP Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file
* Source implementation of an input / output stream for stdio targets.
*/
#include <lib/shell/streamer.h>
#include <stdio.h>
#include <stdlib.h>
#include <termios.h>
#include <unistd.h>
namespace chip {
namespace Shell {
#ifndef SHELL_STREAMER_APP_SPECIFIC
static struct termios the_original_stdin_termios;
static void streamer_restore_termios()
{
int in_fd = fileno(stdin);
tcsetattr(in_fd, TCSAFLUSH, &the_original_stdin_termios);
}
int streamer_stdio_init(streamer_t * streamer)
{
int ret = 0;
int in_fd = fileno(stdin);
struct termios termios;
if (isatty(in_fd))
{
ret = tcgetattr(in_fd, &the_original_stdin_termios);
atexit(&streamer_restore_termios);
ret = tcgetattr(in_fd, &termios);
termios.c_lflag &= ~static_cast<tcflag_t>(ECHO); // Disable echo mode
termios.c_lflag &= ~static_cast<tcflag_t>(ICANON); // Disable canonical line editing mode
ret = tcsetattr(in_fd, TCSANOW, &termios);
}
return ret;
}
ssize_t streamer_stdio_read(streamer_t * streamer, char * buf, size_t len)
{
return read(STDIN_FILENO, buf, len);
}
ssize_t streamer_stdio_write(streamer_t * streamer, const char * buf, size_t len)
{
return write(STDOUT_FILENO, buf, len);
}
static streamer_t streamer_stdio = {
.init_cb = streamer_stdio_init,
.read_cb = streamer_stdio_read,
.write_cb = streamer_stdio_write,
};
streamer_t * streamer_get()
{
return &streamer_stdio;
}
#endif // #ifndef SHELL_STREAMER_APP_SPECIFIC
} // namespace Shell
} // namespace chip