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u-boot/include/command.h
Evgeny Bachinin 26f923c7cf cli: run_commandf(): small fixups 
* vsnprintf() can truncate cmd, hence it makes no sense to launch such
command (it's broken). Moreover, it's better to signalize to the caller
about such case (for facilitating debugging or bug hunting).

* Fix kernel-doc warnings:
  include/command.h:264: info: Scanning doc for run_commandf
  include/command.h:268: warning: contents before sections
  include/command.h:271: warning: No description found for return value
                                  of 'run_commandf'

* Add printf-like format attribute to validate at compile-time the format
string against parameters's type.

* Fix compilation error in case of -Wall, -Werror, -Wextra:
error: variable ‘i’ set but not used [-Werror=unused-but-set-variable]

* Drop extra ret variable.

Signed-off-by: Evgeny Bachinin <EABachinin@sberdevices.ru>
Reviewed-by: Simon Glass <sjg@chromium.org>
2023-03-30 15:09:59 -04:00

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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* (C) Copyright 2000-2009
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*/
/*
* Definitions for Command Processor
*/
#ifndef __COMMAND_H
#define __COMMAND_H
#include <env.h>
#include <linker_lists.h>
#include <linux/compiler_attributes.h>
#ifndef NULL
#define NULL 0
#endif
/* Default to a width of 8 characters for help message command width */
#ifndef CFG_SYS_HELP_CMD_WIDTH
#define CFG_SYS_HELP_CMD_WIDTH 10
#endif
#ifndef __ASSEMBLY__
/*
* Monitor Command Table
*/
struct cmd_tbl {
char *name; /* Command Name */
int maxargs; /* maximum number of arguments */
/*
* Same as ->cmd() except the command
* tells us if it can be repeated.
* Replaces the old ->repeatable field
* which was not able to make
* repeatable property different for
* the main command and sub-commands.
*/
int (*cmd_rep)(struct cmd_tbl *cmd, int flags, int argc,
char *const argv[], int *repeatable);
/* Implementation function */
int (*cmd)(struct cmd_tbl *cmd, int flags, int argc,
char *const argv[]);
char *usage; /* Usage message (short) */
#ifdef CONFIG_SYS_LONGHELP
const char *help; /* Help message (long) */
#endif
#ifdef CONFIG_AUTO_COMPLETE
/* do auto completion on the arguments */
int (*complete)(int argc, char *const argv[],
char last_char, int maxv, char *cmdv[]);
#endif
};
#if defined(CONFIG_CMD_RUN)
int do_run(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[]);
#endif
/* common/command.c */
int _do_help(struct cmd_tbl *cmd_start, int cmd_items, struct cmd_tbl *cmdtp,
int flag, int argc, char *const argv[]);
struct cmd_tbl *find_cmd(const char *cmd);
struct cmd_tbl *find_cmd_tbl(const char *cmd, struct cmd_tbl *table,
int table_len);
int complete_subcmdv(struct cmd_tbl *cmdtp, int count, int argc,
char *const argv[], char last_char, int maxv,
char *cmdv[]);
int cmd_usage(const struct cmd_tbl *cmdtp);
/* Dummy ->cmd and ->cmd_rep wrappers. */
int cmd_always_repeatable(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[], int *repeatable);
int cmd_never_repeatable(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[], int *repeatable);
int cmd_discard_repeatable(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[]);
static inline bool cmd_is_repeatable(struct cmd_tbl *cmdtp)
{
return cmdtp->cmd_rep == cmd_always_repeatable;
}
#ifdef CONFIG_AUTO_COMPLETE
int var_complete(int argc, char *const argv[], char last_char, int maxv,
char *cmdv[]);
int cmd_auto_complete(const char *const prompt, char *buf, int *np,
int *colp);
#endif
/**
* cmd_process_error() - report and process a possible error
*
* @cmdtp: Command which caused the error
* @err: Error code (0 if none, -ve for error, like -EIO)
* Return: 0 (CMD_RET_SUCCESS) if there is not error,
* 1 (CMD_RET_FAILURE) if an error is found
* -1 (CMD_RET_USAGE) if 'usage' error is found
*/
int cmd_process_error(struct cmd_tbl *cmdtp, int err);
/*
* Monitor Command
*
* All commands use a common argument format:
*
* void function(struct cmd_tbl *cmdtp, int flag, int argc,
* char *const argv[]);
*/
#if defined(CONFIG_CMD_MEMORY) || \
defined(CONFIG_CMD_I2C) || \
defined(CONFIG_CMD_ITEST) || \
defined(CONFIG_CMD_PCI) || \
defined(CONFIG_CMD_SETEXPR)
#define CMD_DATA_SIZE
#define CMD_DATA_SIZE_ERR (-1)
#define CMD_DATA_SIZE_STR (-2)
/**
* cmd_get_data_size() - Get the data-size specifier from a command
*
* This reads a '.x' size specifier appended to a command. For example 'md.b'
* is the 'md' command with a '.b' specifier, meaning that the command should
* use bytes.
*
* Valid characters are:
*
* b - byte
* w - word (16 bits)
* l - long (32 bits)
* q - quad (64 bits)
* s - string
*
* @arg: Pointers to the command to check. If a valid specifier is present it
* will be the last character of the string, following a '.'
* @default_size: Default size to return if there is no specifier
* Return: data size in bytes (1, 2, 4, 8) or CMD_DATA_SIZE_ERR for an invalid
* character, or CMD_DATA_SIZE_STR for a string
*/
int cmd_get_data_size(char *arg, int default_size);
#endif
#ifdef CONFIG_CMD_BOOTD
int do_bootd(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[]);
#endif
int do_bootm(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[]);
#ifdef CONFIG_CMD_BOOTM
int bootm_maybe_autostart(struct cmd_tbl *cmdtp, const char *cmd);
#else
static inline int bootm_maybe_autostart(struct cmd_tbl *cmdtp, const char *cmd)
{
return 0;
}
#endif
int do_bootz(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[]);
int do_booti(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[]);
int do_zboot_parent(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[], int *repeatable);
int common_diskboot(struct cmd_tbl *cmdtp, const char *intf, int argc,
char *const argv[]);
int do_reset(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[]);
int do_poweroff(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[]);
unsigned long do_go_exec(ulong (*entry)(int, char * const []), int argc,
char *const argv[]);
#if defined(CONFIG_CMD_NVEDIT_EFI)
int do_env_print_efi(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[]);
int do_env_set_efi(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[]);
#endif
/**
* setexpr_regex_sub() - Replace a regex pattern with a string
*
* @data: Buffer containing the string to update
* @data_size: Size of buffer (must be large enough for the new string)
* @nbuf: Back-reference buffer
* @nbuf_size: Size of back-reference buffer (must be larger enough for @s plus
* all back-reference expansions)
* @r: Regular expression to find
* @s: String to replace with
* @global: true to replace all matches in @data, false to replace just the
* first
* Return: 0 if OK, 1 on error
*/
int setexpr_regex_sub(char *data, uint data_size, char *nbuf, uint nbuf_size,
const char *r, const char *s, bool global);
/*
* Error codes that commands return to cmd_process(). We use the standard 0
* and 1 for success and failure, but add one more case - failure with a
* request to call cmd_usage(). But the cmd_process() function handles
* CMD_RET_USAGE itself and after calling cmd_usage() it will return 1.
* This is just a convenience for commands to avoid them having to call
* cmd_usage() all over the place.
*/
enum command_ret_t {
CMD_RET_SUCCESS, /* 0 = Success */
CMD_RET_FAILURE, /* 1 = Failure */
CMD_RET_USAGE = -1, /* Failure, please report 'usage' error */
};
/**
* Process a command with arguments. We look up the command and execute it
* if valid. Otherwise we print a usage message.
*
* @param flag Some flags normally 0 (see CMD_FLAG_.. above)
* @param argc Number of arguments (arg 0 must be the command text)
* @param argv Arguments
* @param repeatable This function sets this to 0 if the command is not
* repeatable. If the command is repeatable, the value
* is left unchanged.
* @param ticks If ticks is not null, this function set it to the
* number of ticks the command took to complete.
* Return: 0 if command succeeded, else non-zero (CMD_RET_...)
*/
enum command_ret_t cmd_process(int flag, int argc, char *const argv[],
int *repeatable, unsigned long *ticks);
void fixup_cmdtable(struct cmd_tbl *cmdtp, int size);
/**
* board_run_command() - Fallback function to execute a command
*
* When no command line features are enabled in U-Boot, this function is
* called to execute a command. Typically the function can look at the
* command and perform a few very specific tasks, such as booting the
* system in a particular way.
*
* This function is only used when CONFIG_CMDLINE is not enabled.
*
* In normal situations this function should not return, since U-Boot will
* simply hang.
*
* @cmdline: Command line string to execute
* Return: 0 if OK, 1 for error
*/
int board_run_command(const char *cmdline);
int run_command(const char *cmd, int flag);
int run_command_repeatable(const char *cmd, int flag);
/**
* run_commandf() - Run a command created by a format string
*
* @fmt: printf() format string
* @...: Arguments to use (flag is always 0)
*
* The command cannot be larger than (CONFIG_SYS_CBSIZE - 1) characters.
*
* Return:
* Returns 0 on success, -EIO if internal output error occurred, -ENOSPC in
* case of 'fmt' string truncation, or != 0 on error, specific for
* run_command().
*/
int run_commandf(const char *fmt, ...) __printf(1, 2);
/**
* Run a list of commands separated by ; or even \0
*
* Note that if 'len' is not -1, then the command does not need to be nul
* terminated, Memory will be allocated for the command in that case.
*
* @param cmd List of commands to run, each separated bu semicolon
* @param len Length of commands excluding terminator if known (-1 if not)
* @param flag Execution flags (CMD_FLAG_...)
* Return: 0 on success, or != 0 on error.
*/
int run_command_list(const char *cmd, int len, int flag);
/**
* cmd_source_script() - Execute a script
*
* Executes a U-Boot script at a particular address in memory. The script should
* have a header (FIT or legacy) with the script type (IH_TYPE_SCRIPT).
*
* @addr: Address of script
* @fit_uname: FIT subimage name
* Return: result code (enum command_ret_t)
*/
int cmd_source_script(ulong addr, const char *fit_uname, const char *confname);
#endif /* __ASSEMBLY__ */
/*
* Command Flags:
*/
#define CMD_FLAG_REPEAT 0x0001 /* repeat last command */
#define CMD_FLAG_BOOTD 0x0002 /* command is from bootd */
#define CMD_FLAG_ENV 0x0004 /* command is from the environment */
#ifdef CONFIG_AUTO_COMPLETE
# define _CMD_COMPLETE(x) x,
#else
# define _CMD_COMPLETE(x)
#endif
#ifdef CONFIG_SYS_LONGHELP
# define _CMD_HELP(x) x,
#else
# define _CMD_HELP(x)
#endif
#ifdef CONFIG_NEEDS_MANUAL_RELOC
#define U_BOOT_SUBCMDS_RELOC(_cmdname) \
static void _cmdname##_subcmds_reloc(void) \
{ \
static int relocated; \
\
if (relocated) \
return; \
\
fixup_cmdtable(_cmdname##_subcmds, \
ARRAY_SIZE(_cmdname##_subcmds)); \
relocated = 1; \
}
#else
#define U_BOOT_SUBCMDS_RELOC(_cmdname) \
static void _cmdname##_subcmds_reloc(void) { }
#endif
#define U_BOOT_SUBCMDS_DO_CMD(_cmdname) \
static int do_##_cmdname(struct cmd_tbl *cmdtp, int flag, \
int argc, char *const argv[], \
int *repeatable) \
{ \
struct cmd_tbl *subcmd; \
\
_cmdname##_subcmds_reloc(); \
\
/* We need at least the cmd and subcmd names. */ \
if (argc < 2 || argc > CONFIG_SYS_MAXARGS) \
return CMD_RET_USAGE; \
\
subcmd = find_cmd_tbl(argv[1], _cmdname##_subcmds, \
ARRAY_SIZE(_cmdname##_subcmds)); \
if (!subcmd || argc - 1 > subcmd->maxargs) \
return CMD_RET_USAGE; \
\
if (flag == CMD_FLAG_REPEAT && \
!cmd_is_repeatable(subcmd)) \
return CMD_RET_SUCCESS; \
\
return subcmd->cmd_rep(subcmd, flag, argc - 1, \
argv + 1, repeatable); \
}
#ifdef CONFIG_AUTO_COMPLETE
#define U_BOOT_SUBCMDS_COMPLETE(_cmdname) \
static int complete_##_cmdname(int argc, char *const argv[], \
char last_char, int maxv, \
char *cmdv[]) \
{ \
return complete_subcmdv(_cmdname##_subcmds, \
ARRAY_SIZE(_cmdname##_subcmds), \
argc - 1, argv + 1, last_char, \
maxv, cmdv); \
}
#else
#define U_BOOT_SUBCMDS_COMPLETE(_cmdname)
#endif
#define U_BOOT_SUBCMDS(_cmdname, ...) \
static struct cmd_tbl _cmdname##_subcmds[] = { __VA_ARGS__ }; \
U_BOOT_SUBCMDS_RELOC(_cmdname) \
U_BOOT_SUBCMDS_DO_CMD(_cmdname) \
U_BOOT_SUBCMDS_COMPLETE(_cmdname)
#if CONFIG_IS_ENABLED(CMDLINE)
#define U_BOOT_CMDREP_MKENT_COMPLETE(_name, _maxargs, _cmd_rep, \
_usage, _help, _comp) \
{ #_name, _maxargs, _cmd_rep, cmd_discard_repeatable, \
_usage, _CMD_HELP(_help) _CMD_COMPLETE(_comp) }
#define U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd, \
_usage, _help, _comp) \
{ #_name, _maxargs, \
_rep ? cmd_always_repeatable : cmd_never_repeatable, \
_cmd, _usage, _CMD_HELP(_help) _CMD_COMPLETE(_comp) }
#define U_BOOT_CMD_COMPLETE(_name, _maxargs, _rep, _cmd, _usage, _help, _comp) \
ll_entry_declare(struct cmd_tbl, _name, cmd) = \
U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd, \
_usage, _help, _comp);
#define U_BOOT_CMDREP_COMPLETE(_name, _maxargs, _cmd_rep, _usage, \
_help, _comp) \
ll_entry_declare(struct cmd_tbl, _name, cmd) = \
U_BOOT_CMDREP_MKENT_COMPLETE(_name, _maxargs, _cmd_rep, \
_usage, _help, _comp)
#else
#define U_BOOT_SUBCMD_START(name) static struct cmd_tbl name[] = {};
#define U_BOOT_SUBCMD_END
#define _CMD_REMOVE(_name, _cmd) \
int __remove_ ## _name(void) \
{ \
if (0) \
_cmd(NULL, 0, 0, NULL); \
return 0; \
}
#define _CMD_REMOVE_REP(_name, _cmd) \
int __remove_ ## _name(void) \
{ \
if (0) \
_cmd(NULL, 0, 0, NULL, NULL); \
return 0; \
}
#define U_BOOT_CMDREP_MKENT_COMPLETE(_name, _maxargs, _cmd_rep, \
_usage, _help, _comp) \
{ #_name, _maxargs, 0 ? _cmd_rep : NULL, NULL, _usage, \
_CMD_HELP(_help) _CMD_COMPLETE(_comp) }
#define U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd, _usage, \
_help, _comp) \
{ #_name, _maxargs, NULL, 0 ? _cmd : NULL, _usage, \
_CMD_HELP(_help) _CMD_COMPLETE(_comp) }
#define U_BOOT_CMD_COMPLETE(_name, _maxargs, _rep, _cmd, _usage, _help, \
_comp) \
_CMD_REMOVE(sub_ ## _name, _cmd)
#define U_BOOT_CMDREP_COMPLETE(_name, _maxargs, _cmd_rep, _usage, \
_help, _comp) \
_CMD_REMOVE_REP(sub_ ## _name, _cmd_rep)
#endif /* CONFIG_CMDLINE */
#define U_BOOT_CMD(_name, _maxargs, _rep, _cmd, _usage, _help) \
U_BOOT_CMD_COMPLETE(_name, _maxargs, _rep, _cmd, _usage, _help, NULL)
#define U_BOOT_CMD_MKENT(_name, _maxargs, _rep, _cmd, _usage, _help) \
U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd, \
_usage, _help, NULL)
#define U_BOOT_SUBCMD_MKENT_COMPLETE(_name, _maxargs, _rep, _do_cmd, \
_comp) \
U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _do_cmd, \
"", "", _comp)
#define U_BOOT_SUBCMD_MKENT(_name, _maxargs, _rep, _do_cmd) \
U_BOOT_SUBCMD_MKENT_COMPLETE(_name, _maxargs, _rep, _do_cmd, \
NULL)
#define U_BOOT_CMD_WITH_SUBCMDS(_name, _usage, _help, ...) \
U_BOOT_SUBCMDS(_name, __VA_ARGS__) \
U_BOOT_CMDREP_COMPLETE(_name, CONFIG_SYS_MAXARGS, do_##_name, \
_usage, _help, complete_##_name)
#endif /* __COMMAND_H */
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