diff options
| author | thead_admin <occ_thead@service.alibaba.com> | 2022-09-13 11:04:33 +0800 |
|---|---|---|
| committer | thead_admin <occ_thead@service.alibaba.com> | 2022-09-13 11:04:33 +0800 |
| commit | 43db9e00d5837c100c0b2fbbee64a08ab807d1e0 (patch) | |
| tree | b40c0eed02935b6682e8c5c975e3016b6b2f55fe /cmd/help.c | |
Linux_SDK_V0.9.5Linux_SDK_V0.9.5
Diffstat (limited to 'cmd/help.c')
| -rw-r--r-- | cmd/help.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/cmd/help.c b/cmd/help.c new file mode 100644 index 00000000..a1a0b99b --- /dev/null +++ b/cmd/help.c @@ -0,0 +1,39 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2000-2009 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + */ + +#include <common.h> +#include <command.h> + +static int do_help(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ +#ifdef CONFIG_CMDLINE + cmd_tbl_t *start = ll_entry_start(cmd_tbl_t, cmd); + const int len = ll_entry_count(cmd_tbl_t, 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 */ +ll_entry_declare(cmd_tbl_t, question_mark, cmd) = { + "?", CONFIG_SYS_MAXARGS, cmd_always_repeatable, do_help, + "alias for 'help'", +#ifdef CONFIG_SYS_LONGHELP + "" +#endif /* CONFIG_SYS_LONGHELP */ +}; +#endif |