1 // SPDX-License-Identifier: GPL-2.0+
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
6 * Add to readline cmdline-editing by
8 * JinHua Luo, GuangDong Linux Center, <luo.jinhua@gd-linux.com>
18 DECLARE_GLOBAL_DATA_PTR;
22 * Run a command using the selected parser.
24 * @param cmd Command to run
25 * @param flag Execution flags (CMD_FLAG_...)
26 * @return 0 on success, or != 0 on error.
28 int run_command(const char *cmd, int flag)
30 #if !CONFIG_IS_ENABLED(HUSH_PARSER)
32 * cli_run_command can return 0 or 1 for success, so clean up
35 if (cli_simple_run_command(cmd, flag) == -1)
40 int hush_flags = FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP;
42 if (flag & CMD_FLAG_ENV)
43 hush_flags |= FLAG_CONT_ON_NEWLINE;
44 return parse_string_outer(cmd, hush_flags);
49 * Run a command using the selected parser, and check if it is repeatable.
51 * @param cmd Command to run
52 * @param flag Execution flags (CMD_FLAG_...)
53 * @return 0 (not repeatable) or 1 (repeatable) on success, -1 on error.
55 int run_command_repeatable(const char *cmd, int flag)
57 #ifndef CONFIG_HUSH_PARSER
58 return cli_simple_run_command(cmd, flag);
61 * parse_string_outer() returns 1 for failure, so clean up
64 if (parse_string_outer(cmd,
65 FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP))
71 #endif /* CONFIG_CMDLINE */
73 int run_command_list(const char *cmd, int len, int flag)
76 char *buff = (char *)cmd; /* cast away const */
81 #ifdef CONFIG_HUSH_PARSER
82 /* hush will never change our string */
85 /* the built-in parser will change our string if it sees \n */
86 need_buff = strchr(cmd, '\n') != NULL;
90 buff = malloc(len + 1);
93 memcpy(buff, cmd, len);
96 #ifdef CONFIG_HUSH_PARSER
97 rcode = parse_string_outer(buff, FLAG_PARSE_SEMICOLON);
100 * This function will overwrite any \n it sees with a \0, which
101 * is why it can't work with a const char *. Here we are making
102 * using of internal knowledge of this function, to avoid always
103 * doing a malloc() which is actually required only in a case that
106 #ifdef CONFIG_CMDLINE
107 rcode = cli_simple_run_command_list(buff, flag);
109 rcode = board_run_command(buff);
118 /****************************************************************************/
120 #if defined(CONFIG_CMD_RUN)
121 int do_run(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
126 return CMD_RET_USAGE;
128 for (i = 1; i < argc; ++i) {
131 arg = env_get(argv[i]);
133 printf("## Error: \"%s\" not defined\n", argv[i]);
137 if (run_command(arg, flag | CMD_FLAG_ENV) != 0)
144 #if CONFIG_IS_ENABLED(OF_CONTROL)
145 bool cli_process_fdt(const char **cmdp)
147 /* Allow the fdt to override the boot command */
148 char *env = fdtdec_get_config_string(gd->fdt_blob, "bootcmd");
152 * If the bootsecure option was chosen, use secure_boot_cmd().
153 * Always use 'env' in this case, since bootsecure requres that the
154 * bootcmd was specified in the FDT too.
156 return fdtdec_get_config_int(gd->fdt_blob, "bootsecure", 0) != 0;
160 * Runs the given boot command securely. Specifically:
161 * - Doesn't run the command with the shell (run_command or parse_string_outer),
162 * since that's a lot of code surface that an attacker might exploit.
163 * Because of this, we don't do any argument parsing--the secure boot command
164 * has to be a full-fledged u-boot command.
165 * - Doesn't check for keypresses before booting, since that could be a
166 * security hole; also disables Ctrl-C.
167 * - Doesn't allow the command to return.
169 * Upon any failures, this function will drop into an infinite loop after
170 * printing the error message to console.
172 void cli_secure_boot_cmd(const char *cmd)
174 #ifdef CONFIG_CMDLINE
180 printf("## Error: Secure boot command not specified\n");
184 /* Disable Ctrl-C just in case some command is used that checks it. */
187 /* Find the command directly. */
188 #ifdef CONFIG_CMDLINE
189 cmdtp = find_cmd(cmd);
191 printf("## Error: \"%s\" not defined\n", cmd);
195 /* Run the command, forcing no flags and faking argc and argv. */
196 rc = (cmdtp->cmd)(cmdtp, 0, 1, (char **)&cmd);
199 rc = board_run_command(cmd);
202 /* Shouldn't ever return from boot command. */
203 printf("## Error: \"%s\" returned (code %d)\n", cmd, rc);
207 * Not a whole lot to do here. Rebooting won't help much, since we'll
208 * just end up right back here. Just loop.
212 #endif /* CONFIG_IS_ENABLED(OF_CONTROL) */
216 bootstage_mark(BOOTSTAGE_ID_ENTER_CLI_LOOP);
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)