Currently there is no possibility to flush stdin after autocommands are executed. If in the bootcmd the stdin is changed, e.g. from nulldev to serial, it could happen that junk characters sit in the fifo and appear on the cli.
Add a option to clear stdin before starting the CLI. Signed-off-by: Gregor Herburger <[email protected]> --- cmd/Kconfig | 7 +++++++ common/cli.c | 6 ++++++ 2 files changed, 13 insertions(+) diff --git a/cmd/Kconfig b/cmd/Kconfig index 322ebe600c5..e08fbf27358 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -47,6 +47,13 @@ config HUSH_SELECTABLE default y if HUSH_OLD_PARSER && HUSH_MODERN_PARSER endmenu +config CMDLINE_FLUSH_STDIN + bool "Enable flushing input before starting cli" + default n + help + When this option is enabled the stdin buffer will be flushed before + starting the CLI. + config CMDLINE_EDITING bool "Enable command line editing" default y diff --git a/common/cli.c b/common/cli.c index 4694a35cd0e..42d27ed87e7 100644 --- a/common/cli.c +++ b/common/cli.c @@ -295,6 +295,12 @@ err: void cli_loop(void) { bootstage_mark(BOOTSTAGE_ID_ENTER_CLI_LOOP); + + if (IS_ENABLED(CONFIG_CMDLINE_FLUSH_STDIN)) { + while (tstc()) + (void)getchar(); + } + #if CONFIG_IS_ENABLED(HUSH_PARSER) if (gd->flags & GD_FLG_HUSH_MODERN_PARSER) parse_and_run_file(); -- 2.47.3 base-commit: c704af3c8b0f37929bce8c2a4bba27d6e89919c7 branch: cmd-flush-stdin
