LXR uboot/include/cli.h

   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 */
  17void 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 */
  31int 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 */
  39void 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 */
  54int 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 */
  64int 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 */
  89int 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 */
 109int 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 */
 125bool 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 */
 132void cli_secure_boot_cmd(const char *cmd);
 133#else
 134static inline bool cli_process_fdt(const char **cmdp)
 135{
 136        return false;
 137}
 138
 139static 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 */
 150void cli_loop(void);
 151
 152/** Set up the command line interpreter ready for action */
 153void cli_init(void);
 154
 155#define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())
 156
 157#endif
 158