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  */
  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 #ifdef CONFIG_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