u-boot/cmd/pause.c
Samuel Dionne-Riel dc0d17c26a cmd: Add pause command
This command is being introduced with the goal of allowing user-friendly
"generic use case" U-Boot builds to pause until user input under some
situations.

The main use case would be when a boot failure happens, to pause until
the user has had time to acknowledge the current state.

Tested using:

    make && ./u-boot -v -T -c 'ut lib lib_test_hush_pause'

Signed-off-by: Samuel Dionne-Riel <samuel@dionne-riel.com>
Cc: Simon Glass <sjg@chromium.org>
2022-09-02 13:40:42 -04:00

32 lines
716 B
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2021
* Samuel Dionne-Riel <samuel@dionne-riel.com>
*/
#include <command.h>
#include <stdio.h>
static int do_pause(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
{
char *message = "Press any key to continue...";
if (argc == 2)
message = argv[1];
/* No newline, so it sticks to the bottom of the screen */
printf("%s", message);
/* Wait on "any" key... */
(void) getchar();
/* Since there was no newline, we need it now */
printf("\n");
return CMD_RET_SUCCESS;
}
U_BOOT_CMD(pause, 2, 1, do_pause,
"delay until user input",
"[prompt] - Wait until users presses any key. [prompt] can be used to customize the message.\n"
);