X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=common%2Fcli.c;h=075ae9dc4aec5971b327651c7b8117211adb04e1;hb=49891df661acf164460ba3ada60fccfc5a53ea71;hp=9cf7ba1bd7948444e0415407152f6d5ab415407f;hpb=30354978ff470470c15caea2566b61b5792ad277;p=u-boot

diff --git a/common/cli.c b/common/cli.c
index 9cf7ba1bd7..075ae9dc4a 100644
--- a/common/cli.c
+++ b/common/cli.c
@@ -12,8 +12,11 @@
 #include <common.h>
 #include <cli.h>
 #include <cli_hush.h>
+#include <fdtdec.h>
 #include <malloc.h>
 
+DECLARE_GLOBAL_DATA_PTR;
+
 /*
  * Run a command using the selected parser.
  *
@@ -33,8 +36,35 @@ int run_command(const char *cmd, int flag)
 
 	return 0;
 #else
-	return parse_string_outer(cmd,
-			FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP);
+	int hush_flags = FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP;
+
+	if (flag & CMD_FLAG_ENV)
+		hush_flags |= FLAG_CONT_ON_NEWLINE;
+	return parse_string_outer(cmd, hush_flags);
+#endif
+}
+
+/*
+ * Run a command using the selected parser, and check if it is repeatable.
+ *
+ * @param cmd	Command to run
+ * @param flag	Execution flags (CMD_FLAG_...)
+ * @return 0 (not repeatable) or 1 (repeatable) on success, -1 on error.
+ */
+int run_command_repeatable(const char *cmd, int flag)
+{
+#ifndef CONFIG_SYS_HUSH_PARSER
+	return cli_simple_run_command(cmd, flag);
+#else
+	/*
+	 * parse_string_outer() returns 1 for failure, so clean up
+	 * its result.
+	 */
+	if (parse_string_outer(cmd,
+			       FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP))
+		return -1;
+
+	return 0;
 #endif
 }
 
@@ -98,9 +128,94 @@ int do_run(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 			return 1;
 		}
 
-		if (run_command(arg, flag) != 0)
+		if (run_command(arg, flag | CMD_FLAG_ENV) != 0)
 			return 1;
 	}
 	return 0;
 }
 #endif
+
+#ifdef CONFIG_OF_CONTROL
+bool cli_process_fdt(const char **cmdp)
+{
+	/* Allow the fdt to override the boot command */
+	char *env = fdtdec_get_config_string(gd->fdt_blob, "bootcmd");
+	if (env)
+		*cmdp = env;
+	/*
+	 * If the bootsecure option was chosen, use secure_boot_cmd().
+	 * Always use 'env' in this case, since bootsecure requres that the
+	 * bootcmd was specified in the FDT too.
+	 */
+	return fdtdec_get_config_int(gd->fdt_blob, "bootsecure", 0) != 0;
+}
+
+/*
+ * Runs the given boot command securely.  Specifically:
+ * - Doesn't run the command with the shell (run_command or parse_string_outer),
+ *   since that's a lot of code surface that an attacker might exploit.
+ *   Because of this, we don't do any argument parsing--the secure boot command
+ *   has to be a full-fledged u-boot command.
+ * - Doesn't check for keypresses before booting, since that could be a
+ *   security hole; also disables Ctrl-C.
+ * - Doesn't allow the command to return.
+ *
+ * Upon any failures, this function will drop into an infinite loop after
+ * printing the error message to console.
+ */
+void cli_secure_boot_cmd(const char *cmd)
+{
+	cmd_tbl_t *cmdtp;
+	int rc;
+
+	if (!cmd) {
+		printf("## Error: Secure boot command not specified\n");
+		goto err;
+	}
+
+	/* Disable Ctrl-C just in case some command is used that checks it. */
+	disable_ctrlc(1);
+
+	/* Find the command directly. */
+	cmdtp = find_cmd(cmd);
+	if (!cmdtp) {
+		printf("## Error: \"%s\" not defined\n", cmd);
+		goto err;
+	}
+
+	/* Run the command, forcing no flags and faking argc and argv. */
+	rc = (cmdtp->cmd)(cmdtp, 0, 1, (char **)&cmd);
+
+	/* Shouldn't ever return from boot command. */
+	printf("## Error: \"%s\" returned (code %d)\n", cmd, rc);
+
+err:
+	/*
+	 * Not a whole lot to do here.  Rebooting won't help much, since we'll
+	 * just end up right back here.  Just loop.
+	 */
+	hang();
+}
+#endif /* CONFIG_OF_CONTROL */
+
+void cli_loop(void)
+{
+#ifdef CONFIG_SYS_HUSH_PARSER
+	parse_file_outer();
+	/* This point is never reached */
+	for (;;);
+#else
+	cli_simple_loop();
+#endif /*CONFIG_SYS_HUSH_PARSER*/
+}
+
+void cli_init(void)
+{
+#ifdef CONFIG_SYS_HUSH_PARSER
+	u_boot_hush_start();
+#endif
+
+#if defined(CONFIG_HUSH_INIT_VAR)
+	hush_init_var();
+#endif
+}