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 with sandbox using:
make && ./u-boot -v -T -c 'ut lib lib_test_hush_pause'
Signed-off-by: Samuel Dionne-Riel samuel@dionne-riel.com --- cmd/Kconfig | 7 +++++ cmd/Makefile | 1 + cmd/pause.c | 35 +++++++++++++++++++++ configs/sandbox64_defconfig | 1 + configs/sandbox_defconfig | 1 + test/cmd/Makefile | 3 ++ test/cmd/test_pause.c | 62 +++++++++++++++++++++++++++++++++++++ 7 files changed, 110 insertions(+) create mode 100644 cmd/pause.c create mode 100644 test/cmd/test_pause.c
diff --git a/cmd/Kconfig b/cmd/Kconfig index 3625ff2a50b..e774670a35c 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -1961,6 +1961,13 @@ config CMD_GETTIME milliseconds. See also the 'bootstage' command which provides more flexibility for boot timing.
+config CMD_PAUSE + bool "pause command" + default n + help + Delay execution waiting for any user input. + Useful to allow the user to read a failure log. + config CMD_RNG bool "rng command" depends on DM_RNG diff --git a/cmd/Makefile b/cmd/Makefile index 5e43a1e022e..98a6224bdc1 100644 --- a/cmd/Makefile +++ b/cmd/Makefile @@ -102,6 +102,7 @@ obj-$(CONFIG_CMD_MFSL) += mfsl.o obj-$(CONFIG_CMD_MII) += mii.o obj-$(CONFIG_CMD_MISC) += misc.o obj-$(CONFIG_CMD_MDIO) += mdio.o +obj-$(CONFIG_CMD_PAUSE) += pause.o obj-$(CONFIG_CMD_SLEEP) += sleep.o obj-$(CONFIG_CMD_MMC) += mmc.o obj-$(CONFIG_CMD_OPTEE_RPMB) += optee_rpmb.o diff --git a/cmd/pause.c b/cmd/pause.c new file mode 100644 index 00000000000..07bf346f3d1 --- /dev/null +++ b/cmd/pause.c @@ -0,0 +1,35 @@ +// 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) + return CMD_RET_USAGE; + + 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", + "pause [prompt] - Wait until users presses any key. [prompt] can be used to customize the message.\n" +); diff --git a/configs/sandbox64_defconfig b/configs/sandbox64_defconfig index 6553568e768..0af582d642d 100644 --- a/configs/sandbox64_defconfig +++ b/configs/sandbox64_defconfig @@ -67,6 +67,7 @@ CONFIG_CMD_BMP=y CONFIG_CMD_EFIDEBUG=y CONFIG_CMD_RTC=y CONFIG_CMD_TIME=y +CONFIG_CMD_PAUSE=y CONFIG_CMD_TIMER=y CONFIG_CMD_SOUND=y CONFIG_CMD_QFW=y diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig index eba7bcbb483..d856d9b0942 100644 --- a/configs/sandbox_defconfig +++ b/configs/sandbox_defconfig @@ -96,6 +96,7 @@ CONFIG_CMD_BOOTCOUNT=y CONFIG_CMD_EFIDEBUG=y CONFIG_CMD_RTC=y CONFIG_CMD_TIME=y +CONFIG_CMD_PAUSE=y CONFIG_CMD_TIMER=y CONFIG_CMD_SOUND=y CONFIG_CMD_QFW=y diff --git a/test/cmd/Makefile b/test/cmd/Makefile index c331757425e..1bb02d93a23 100644 --- a/test/cmd/Makefile +++ b/test/cmd/Makefile @@ -5,6 +5,9 @@ ifdef CONFIG_HUSH_PARSER obj-$(CONFIG_CONSOLE_RECORD) += test_echo.o endif +ifdef CONFIG_CONSOLE_RECORD +obj-$(CONFIG_CMD_PAUSE) += test_pause.o +endif obj-y += mem.o obj-$(CONFIG_CMD_ADDRMAP) += addrmap.o obj-$(CONFIG_CMD_FDT) += fdt.o diff --git a/test/cmd/test_pause.c b/test/cmd/test_pause.c new file mode 100644 index 00000000000..9c55c6302bc --- /dev/null +++ b/test/cmd/test_pause.c @@ -0,0 +1,62 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Tests for pause command + * + * Copyright 2022, Samuel Dionne-Riel samuel@dionne-riel.com + * + * Based on tests for echo: + * Copyright 2020, Heinrich Schuchadt xypron.glpk@gmx.de + */ + +#include <common.h> +#include <command.h> +#include <asm/global_data.h> +#include <display_options.h> +#include <test/lib.h> +#include <test/test.h> +#include <test/ut.h> + +DECLARE_GLOBAL_DATA_PTR; + +struct test_data { + char *cmd; + char *expected; + int expected_ret; +}; + +static struct test_data pause_data[] = { + /* Test default message */ + {"pause", + "Press any key to continue...", + 0}, + /* Test provided message */ + {"pause 'Prompt for pause...'", + "Prompt for pause...", + 0}, + /* Test providing more than one params */ + {"pause a b", + "pause - delay until user input", /* start of help message */ + 1}, +}; + +static int lib_test_hush_pause(struct unit_test_state *uts) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(pause_data); ++i) { + ut_silence_console(uts); + console_record_reset_enable(); + /* Only cook a newline when the command is expected to pause. */ + if (pause_data[i].expected_ret == 0) + console_in_puts("\n"); + ut_asserteq(pause_data[i].expected_ret, run_command(pause_data[i].cmd, 0)); + ut_unsilence_console(uts); + console_record_readline(uts->actual_str, + sizeof(uts->actual_str)); + ut_asserteq_str(pause_data[i].expected, uts->actual_str); + ut_asserteq(pause_data[i].expected_ret, ut_check_console_end(uts)); + } + return 0; +} + +LIB_TEST(lib_test_hush_pause, 0);