]>
git.ipfire.org Git - people/ms/u-boot.git/blob - common/cli.c
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * Add to readline cmdline-editing by
7 * JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com>
9 * SPDX-License-Identifier: GPL-2.0+
19 DECLARE_GLOBAL_DATA_PTR
;
23 * Run a command using the selected parser.
25 * @param cmd Command to run
26 * @param flag Execution flags (CMD_FLAG_...)
27 * @return 0 on success, or != 0 on error.
29 int run_command(const char *cmd
, int flag
)
31 #ifndef CONFIG_HUSH_PARSER
33 * cli_run_command can return 0 or 1 for success, so clean up
36 if (cli_simple_run_command(cmd
, flag
) == -1)
41 int hush_flags
= FLAG_PARSE_SEMICOLON
| FLAG_EXIT_FROM_LOOP
;
43 if (flag
& CMD_FLAG_ENV
)
44 hush_flags
|= FLAG_CONT_ON_NEWLINE
;
45 return parse_string_outer(cmd
, hush_flags
);
50 * Run a command using the selected parser, and check if it is repeatable.
52 * @param cmd Command to run
53 * @param flag Execution flags (CMD_FLAG_...)
54 * @return 0 (not repeatable) or 1 (repeatable) on success, -1 on error.
56 int run_command_repeatable(const char *cmd
, int flag
)
58 #ifndef CONFIG_HUSH_PARSER
59 return cli_simple_run_command(cmd
, flag
);
62 * parse_string_outer() returns 1 for failure, so clean up
65 if (parse_string_outer(cmd
,
66 FLAG_PARSE_SEMICOLON
| FLAG_EXIT_FROM_LOOP
))
72 #endif /* CONFIG_CMDLINE */
74 int run_command_list(const char *cmd
, int len
, int flag
)
77 char *buff
= (char *)cmd
; /* cast away const */
82 #ifdef CONFIG_HUSH_PARSER
83 /* hush will never change our string */
86 /* the built-in parser will change our string if it sees \n */
87 need_buff
= strchr(cmd
, '\n') != NULL
;
91 buff
= malloc(len
+ 1);
94 memcpy(buff
, cmd
, len
);
97 #ifdef CONFIG_HUSH_PARSER
98 rcode
= parse_string_outer(buff
, FLAG_PARSE_SEMICOLON
);
101 * This function will overwrite any \n it sees with a \0, which
102 * is why it can't work with a const char *. Here we are making
103 * using of internal knowledge of this function, to avoid always
104 * doing a malloc() which is actually required only in a case that
107 #ifdef CONFIG_CMDLINE
108 rcode
= cli_simple_run_command_list(buff
, flag
);
110 rcode
= board_run_command(buff
);
119 /****************************************************************************/
121 #if defined(CONFIG_CMD_RUN)
122 int do_run(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
127 return CMD_RET_USAGE
;
129 for (i
= 1; i
< argc
; ++i
) {
132 arg
= getenv(argv
[i
]);
134 printf("## Error: \"%s\" not defined\n", argv
[i
]);
138 if (run_command(arg
, flag
| CMD_FLAG_ENV
) != 0)
145 #if CONFIG_IS_ENABLED(OF_CONTROL)
146 bool cli_process_fdt(const char **cmdp
)
148 /* Allow the fdt to override the boot command */
149 char *env
= fdtdec_get_config_string(gd
->fdt_blob
, "bootcmd");
153 * If the bootsecure option was chosen, use secure_boot_cmd().
154 * Always use 'env' in this case, since bootsecure requres that the
155 * bootcmd was specified in the FDT too.
157 return fdtdec_get_config_int(gd
->fdt_blob
, "bootsecure", 0) != 0;
161 * Runs the given boot command securely. Specifically:
162 * - Doesn't run the command with the shell (run_command or parse_string_outer),
163 * since that's a lot of code surface that an attacker might exploit.
164 * Because of this, we don't do any argument parsing--the secure boot command
165 * has to be a full-fledged u-boot command.
166 * - Doesn't check for keypresses before booting, since that could be a
167 * security hole; also disables Ctrl-C.
168 * - Doesn't allow the command to return.
170 * Upon any failures, this function will drop into an infinite loop after
171 * printing the error message to console.
173 void cli_secure_boot_cmd(const char *cmd
)
175 #ifdef CONFIG_CMDLINE
181 printf("## Error: Secure boot command not specified\n");
185 /* Disable Ctrl-C just in case some command is used that checks it. */
188 /* Find the command directly. */
189 #ifdef CONFIG_CMDLINE
190 cmdtp
= find_cmd(cmd
);
192 printf("## Error: \"%s\" not defined\n", cmd
);
196 /* Run the command, forcing no flags and faking argc and argv. */
197 rc
= (cmdtp
->cmd
)(cmdtp
, 0, 1, (char **)&cmd
);
200 rc
= board_run_command(cmd
);
203 /* Shouldn't ever return from boot command. */
204 printf("## Error: \"%s\" returned (code %d)\n", cmd
, rc
);
208 * Not a whole lot to do here. Rebooting won't help much, since we'll
209 * just end up right back here. Just loop.
213 #endif /* CONFIG_IS_ENABLED(OF_CONTROL) */
217 #ifdef CONFIG_HUSH_PARSER
219 /* This point is never reached */
221 #elif defined(CONFIG_CMDLINE)
224 printf("## U-Boot command line is disabled. Please enable CONFIG_CMDLINE\n");
225 #endif /*CONFIG_HUSH_PARSER*/
230 #ifdef CONFIG_HUSH_PARSER
234 #if defined(CONFIG_HUSH_INIT_VAR)