include/cli.h

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