esp-idf/components/console/esp_console_repl_linux.c

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/*
* SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <termios.h>
#include <string.h>
#include <assert.h>
#include <sys/cdefs.h>
#include "sdkconfig.h"
#include "esp_log.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "linenoise/linenoise.h"
#include "esp_console.h"
#include "console_private.h"
static const char *TAG = "console.repl";
static struct termios s_orig_termios;
/**
* This function restores the original terminal settings.
*/
static void disable_raw_mode(void)
{
assert(tcsetattr(STDIN_FILENO, TCSAFLUSH, &s_orig_termios) == 0);
}
/**
* Depending on if the input is a terminal or a file or pipe, we need to apply different
* settings to avoid additional processing or buffering getting into our way.
*/
static void prepare_input_stream(void)
{
// Set stdin to unbuffered
setvbuf(stdin, NULL, _IONBF, 0);
const int stdin_fileno = fileno(stdin);
if (isatty(stdin_fileno)) {
// Use Termios driver to activate CR-NL translation and deactivate echo and canonical mode
assert(tcgetattr(stdin_fileno, &s_orig_termios) == 0);
struct termios raw = s_orig_termios;
raw.c_iflag |= ICRNL; // we translate to NL because linenoise expects NL
raw.c_lflag &= ~(ECHO | ICANON); // turn off echo and canonical mode
assert(tcsetattr(stdin_fileno, TCSAFLUSH, &raw) == 0);
// Make sure user does not end up with a broken terminal
assert(atexit(disable_raw_mode) == 0);
} else {
// Flush input
assert(fflush(stdin) == 0);
}
}
static esp_err_t esp_console_repl_linux_delete(esp_console_repl_t *repl)
{
esp_err_t ret = ESP_OK;
esp_console_repl_com_t *repl_com = __containerof(repl, esp_console_repl_com_t, repl_core);
esp_console_repl_universal_t *linux_repl = __containerof(repl_com, esp_console_repl_universal_t, repl_com);
// check if already de-initialized
if (repl_com->state == CONSOLE_REPL_STATE_DEINIT) {
ESP_LOGE(TAG, "already de-initialized");
ret = ESP_ERR_INVALID_STATE;
goto _exit;
}
repl_com->state = CONSOLE_REPL_STATE_DEINIT;
esp_console_deinit();
free(linux_repl);
_exit:
return ret;
}
static esp_err_t esp_console_new_repl_linux(const esp_console_repl_config_t *repl_config, esp_console_repl_t **ret_repl)
{
esp_console_repl_universal_t *linux_repl = NULL;
if (!repl_config || !ret_repl) {
return ESP_ERR_INVALID_ARG;
}
esp_err_t ret = ESP_OK;
// allocate memory for console REPL context
linux_repl = calloc(1, sizeof(esp_console_repl_universal_t));
if (!linux_repl) {
ret = ESP_ERR_NO_MEM;
goto _exit;
}
/* Enable blocking mode on stdin and stdout */
fcntl(fileno(stdout), F_SETFL, 0);
fcntl(fileno(stdin), F_SETFL, 0);
// initialize console , common part
ret = esp_console_common_init(repl_config->max_cmdline_length, &linux_repl->repl_com);
if (ret != ESP_OK) {
goto _exit;
}
// setup history
ret = esp_console_setup_history(repl_config->history_save_path, repl_config->max_history_len, &linux_repl->repl_com);
if (ret != ESP_OK) {
goto _exit;
}
// Make sure the setup works on Linux without buffering or additional processing
prepare_input_stream();
// setup prompt
esp_console_setup_prompt(repl_config->prompt, &linux_repl->repl_com);
/* Fill the structure here as it will be used directly by the created task. */
linux_repl->uart_channel = CONFIG_ESP_CONSOLE_UART_NUM;
linux_repl->repl_com.state = CONSOLE_REPL_STATE_INIT;
linux_repl->repl_com.repl_core.del = esp_console_repl_linux_delete;
/* spawn a single thread to run REPL */
if (xTaskCreate(esp_console_repl_task, "console_repl", repl_config->task_stack_size,
linux_repl, repl_config->task_priority, &linux_repl->repl_com.task_hdl) != pdTRUE) {
ret = ESP_FAIL;
goto _exit;
}
*ret_repl = &linux_repl->repl_com.repl_core;
return ESP_OK;
_exit:
if (linux_repl) {
esp_console_deinit();
free(linux_repl);
}
if (ret_repl) {
*ret_repl = NULL;
}
return ret;
}
#if CONFIG_ESP_CONSOLE_UART_DEFAULT || CONFIG_ESP_CONSOLE_UART_CUSTOM
esp_err_t esp_console_new_repl_uart(const esp_console_dev_uart_config_t *dev_config, const esp_console_repl_config_t *repl_config, esp_console_repl_t **ret_repl)
{
if (!dev_config) {
return ESP_ERR_INVALID_ARG;
}
return esp_console_new_repl_linux(repl_config, ret_repl);
}
#endif // CONFIG_ESP_CONSOLE_UART_DEFAULT || CONFIG_ESP_CONSOLE_UART_CUSTOM
#if CONFIG_ESP_CONSOLE_USB_CDC
esp_err_t esp_console_new_repl_usb_cdc(const esp_console_dev_usb_cdc_config_t *dev_config, const esp_console_repl_config_t *repl_config, esp_console_repl_t **ret_repl)
{
if (!dev_config) {
return ESP_ERR_INVALID_ARG;
}
return esp_console_new_repl_linux(repl_config, ret_repl);
}
#endif // CONFIG_ESP_CONSOLE_USB_CDC
#if CONFIG_ESP_CONSOLE_USB_SERIAL_JTAG
esp_err_t esp_console_new_repl_usb_serial_jtag(const esp_console_dev_usb_serial_jtag_config_t *dev_config, const esp_console_repl_config_t *repl_config, esp_console_repl_t **ret_repl)
{
if (!dev_config) {
return ESP_ERR_INVALID_ARG;
}
return esp_console_new_repl_linux(repl_config, ret_repl);
}
#endif // CONFIG_ESP_CONSOLE_USB_SERIAL_JTAG