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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