1 /* 2 * (C) Copyright 2014 Google, Inc 3 * Simon Glass <sjg@chromium.org> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #ifndef __CLI_H 9 #define __CLI_H 10 11 /** 12 * Go into the command loop 13 * 14 * This will return if we get a timeout waiting for a command. See 15 * CONFIG_BOOT_RETRY_TIME. 16 */ 17 void cli_simple_loop(void); 18 19 /** 20 * cli_simple_run_command() - Execute a command with the simple CLI 21 * 22 * @cmd: String containing the command to execute 23 * @flag Flag value - see CMD_FLAG_... 24 * @return 1 - command executed, repeatable 25 * 0 - command executed but not repeatable, interrupted commands are 26 * always considered not repeatable 27 * -1 - not executed (unrecognized, bootd recursion or too many args) 28 * (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is 29 * considered unrecognized) 30 */ 31 int cli_simple_run_command(const char *cmd, int flag); 32 33 /** 34 * cli_simple_process_macros() - Expand $() and ${} format env. variables 35 * 36 * @param input Input string possible containing $() / ${} vars 37 * @param output Output string with $() / ${} vars expanded 38 */ 39 void cli_simple_process_macros(const char *input, char *output); 40 41 /** 42 * cli_simple_run_command_list() - Execute a list of command 43 * 44 * The commands should be separated by ; or \n and will be executed 45 * by the built-in parser. 46 * 47 * This function cannot take a const char * for the command, since if it 48 * finds newlines in the string, it replaces them with \0. 49 * 50 * @param cmd String containing list of commands 51 * @param flag Execution flags (CMD_FLAG_...) 52 * @return 0 on success, or != 0 on error. 53 */ 54 int cli_simple_run_command_list(char *cmd, int flag); 55 56 /** 57 * cli_readline() - read a line into the console_buffer 58 * 59 * This is a convenience function which calls cli_readline_into_buffer(). 60 * 61 * @prompt: Prompt to display 62 * @return command line length excluding terminator, or -ve on error 63 */ 64 int cli_readline(const char *const prompt); 65 66 /** 67 * readline_into_buffer() - read a line into a buffer 68 * 69 * Display the prompt, then read a command line into @buffer. The 70 * maximum line length is CONFIG_SYS_CBSIZE including a \0 terminator, which 71 * will always be added. 72 * 73 * The command is echoed as it is typed. Command editing is supported if 74 * CONFIG_CMDLINE_EDITING is defined. Tab auto-complete is supported if 75 * CONFIG_AUTO_COMPLETE is defined. If CONFIG_BOOT_RETRY_TIME is defined, 76 * then a timeout will be applied. 77 * 78 * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0, 79 * time out when time goes past endtime (timebase time in ticks). 80 * 81 * @prompt: Prompt to display 82 * @buffer: Place to put the line that is entered 83 * @timeout: Timeout in milliseconds, 0 if none 84 * @return command line length excluding terminator, or -ve on error: of the 85 * timeout is exceeded (either CONFIG_BOOT_RETRY_TIME or the timeout 86 * parameter), then -2 is returned. If a break is detected (Ctrl-C) then 87 * -1 is returned. 88 */ 89 int cli_readline_into_buffer(const char *const prompt, char *buffer, 90 int timeout); 91 92 /** 93 * parse_line() - split a command line down into separate arguments 94 * 95 * The argv[] array is filled with pointers into @line, and each argument 96 * is terminated by \0 (i.e. @line is changed in the process unless there 97 * is only one argument). 98 * 99 * #argv is terminated by a NULL after the last argument pointer. 100 * 101 * At most CONFIG_SYS_MAXARGS arguments are permited - if there are more 102 * than that then an error is printed, and this function returns 103 * CONFIG_SYS_MAXARGS, with argv[] set up to that point. 104 * 105 * @line: Command line to parse 106 * @args: Array to hold arguments 107 * @return number of arguments 108 */ 109 int cli_simple_parse_line(char *line, char *argv[]); 110 111 #if CONFIG_IS_ENABLED(OF_CONTROL) 112 /** 113 * cli_process_fdt() - process the boot command from the FDT 114 * 115 * If bootcmmd is defined in the /config node of the FDT, we use that 116 * as the boot command. Further, if bootsecure is set to 1 (in the same 117 * node) then we return true, indicating that the command should be executed 118 * as securely as possible, avoiding the CLI parser. 119 * 120 * @cmdp: On entry, the command that will be executed if the FDT does 121 * not have a command. Returns the command to execute after 122 * checking the FDT. 123 * @return true to execute securely, else false 124 */ 125 bool cli_process_fdt(const char **cmdp); 126 127 /** cli_secure_boot_cmd() - execute a command as securely as possible 128 * 129 * This avoids using the parser, thus executing the command with the 130 * smallest amount of code. Parameters are not supported. 131 */ 132 void cli_secure_boot_cmd(const char *cmd); 133 #else 134 static inline bool cli_process_fdt(const char **cmdp) 135 { 136 return false; 137 } 138 139 static inline void cli_secure_boot_cmd(const char *cmd) 140 { 141 } 142 #endif /* CONFIG_OF_CONTROL */ 143 144 /** 145 * Go into the command loop 146 * 147 * This will return if we get a timeout waiting for a command, but only for 148 * the simple parser (not hush). See CONFIG_BOOT_RETRY_TIME. 149 */ 150 void cli_loop(void); 151 152 /** Set up the command line interpreter ready for action */ 153 void cli_init(void); 154 155 #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk()) 156 157 #endif 158