diff options
Diffstat (limited to 'cmd/help.c')
| -rw-r--r-- | cmd/help.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/cmd/help.c b/cmd/help.c new file mode 100644 index 00000000000..56579e28d31 --- /dev/null +++ b/cmd/help.c @@ -0,0 +1,42 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2000-2009 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + */ + +#include <command.h> + +static int do_help(struct cmd_tbl *cmdtp, int flag, int argc, + char *const argv[]) +{ +#ifdef CONFIG_CMDLINE + struct cmd_tbl *start = ll_entry_start(struct cmd_tbl, cmd); + const int len = ll_entry_count(struct cmd_tbl, cmd); + return _do_help(start, len, cmdtp, flag, argc, argv); +#else + return 0; +#endif +} + +U_BOOT_CMD( + help, CONFIG_SYS_MAXARGS, 1, do_help, + "print command description/usage", + "\n" + " - print brief description of all commands\n" + "help command ...\n" + " - print detailed usage of 'command'" +); + +#ifdef CONFIG_CMDLINE +/* + * This does not use the U_BOOT_CMD macro as ? can't be used in symbol names + * nor can we rely on the CONFIG_SYS_LONGHELP helper macro + */ +ll_entry_declare(struct cmd_tbl, question_mark, cmd) = { + "?", CONFIG_SYS_MAXARGS, cmd_always_repeatable, do_help, + "alias for 'help'", +#ifdef CONFIG_SYS_LONGHELP + "" +#endif /* CONFIG_SYS_LONGHELP */ +}; +#endif |