shell.c 4.52 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11
/*
 * This work is part of the White Rabbit project
 *
 * Copyright (C) 2012 CERN (www.cern.ch)
 * Copyright (C) 2012 GSI (www.gsi.de)
 * Author: Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
 * Author: Wesley W. Terpstra <w.terpstra@gsi.de>
 * Author: Grzegorz Daniluk <grzegorz.daniluk@cern.ch>
 *
 * Released according to the GNU GPL, version 2 or any later version.
 */
12 13 14 15
#include <stdio.h>
#include <string.h>
#include <errno.h>

16
#include <wrc.h>
17 18
#include "util.h"
#include "uart.h"
19
#include "syscon.h"
20
#include "shell.h"
21
#include "eeprom.h"
22

23
#define SH_MAX_LINE_LEN 80
24
#define SH_MAX_ARGS 8
25
#define SH_ENVIRON_SIZE 256
26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48

/* interactive shell state definitions */

#define SH_PROMPT 0
#define SH_INPUT 1
#define SH_EXEC 2

#define ESCAPE_FLAG 0x10000

#define KEY_LEFT (ESCAPE_FLAG | 68)
#define KEY_RIGHT (ESCAPE_FLAG | 67)
#define KEY_ENTER (13)
#define KEY_ESCAPE (27)
#define KEY_BACKSPACE (127)
#define KEY_DELETE (126)

static char cmd_buf[SH_MAX_LINE_LEN + 1];
static int cmd_pos = 0, cmd_len = 0;
static int state = SH_PROMPT;
static int current_key = 0;

static int insert(char c)
{
49
	if (cmd_len >= SH_MAX_LINE_LEN)
50 51
		return 0;

52 53 54
	if (cmd_pos != cmd_len)
		memmove(&cmd_buf[cmd_pos + 1], &cmd_buf[cmd_pos],
			cmd_len - cmd_pos);
55 56 57 58 59 60 61 62 63 64

	cmd_buf[cmd_pos] = c;
	cmd_pos++;
	cmd_len++;

	return 1;
}

static void delete(int where)
{
65
	memmove(&cmd_buf[where], &cmd_buf[where + 1], cmd_len - where);
66 67 68 69 70 71 72 73 74 75
	cmd_len--;
}

static void esc(char code)
{
	mprintf("\033[1%c", code);
}

static int _shell_exec()
{
76
	char *tokptr[SH_MAX_ARGS + 1];
77 78
	struct wrc_shell_cmd *p;
	int n = 0, i = 0, rv;
79 80

	memset(tokptr, 0, sizeof(tokptr));
81

82 83
	while (1) {
		if (n >= SH_MAX_ARGS)
84 85
			break;

86 87
		while (cmd_buf[i] == ' ' && cmd_buf[i])
			cmd_buf[i++] = 0;
88

89
		if (!cmd_buf[i])
90 91
			break;

92 93 94
		tokptr[n++] = &cmd_buf[i];
		while (cmd_buf[i] != ' ' && cmd_buf[i])
			i++;
95

96
		if (!cmd_buf[i])
97 98 99
			break;
	}

100
	if (!n)
101 102
		return 0;

103
	if (*tokptr[0] == '#')
104 105
		return 0;

106 107 108
	for (p = __cmd_begin; p < __cmd_end; p++)
		if (!strcasecmp(p->name, tokptr[0])) {
			rv = p->exec((const char **)(tokptr + 1));
109
			if (rv < 0)
110
				mprintf("Command \"%s\": error %d\n",
111
					p->name, rv);
112 113 114
			return rv;
		}

115
	mprintf("Unrecognized command \"%s\".\n", tokptr[0]);
116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134
	return -EINVAL;
}

int shell_exec(const char *cmd)
{
	strncpy(cmd_buf, cmd, SH_MAX_LINE_LEN);
	cmd_len = strlen(cmd_buf);
	return _shell_exec();
}

void shell_init()
{
	cmd_len = cmd_pos = 0;
	state = SH_PROMPT;
}

void shell_interactive()
{
	int c;
135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173
	switch (state) {
	case SH_PROMPT:
		mprintf("wrc# ");
		cmd_pos = 0;
		cmd_len = 0;
		state = SH_INPUT;
		break;

	case SH_INPUT:
		c = uart_read_byte();

		if (c < 0)
			return;

		if (c == 27 || ((current_key & ESCAPE_FLAG) && c == 91))
			current_key = ESCAPE_FLAG;
		else
			current_key |= c;

		if (current_key & 0xff) {

			switch (current_key) {
			case KEY_LEFT:
				if (cmd_pos > 0) {
					cmd_pos--;
					esc('D');
				}
				break;
			case KEY_RIGHT:
				if (cmd_pos < cmd_len) {
					cmd_pos++;
					esc('C');
				}
				break;

			case KEY_ENTER:
				mprintf("\n");
				state = SH_EXEC;
				break;
174

175 176 177 178 179 180 181 182 183 184 185 186 187 188 189
			case KEY_DELETE:
				if (cmd_pos != cmd_len) {
					delete(cmd_pos);
					esc('P');
				}
				break;

			case KEY_BACKSPACE:
				if (cmd_pos > 0) {
					esc('D');
					esc('P');
					delete(cmd_pos - 1);
					cmd_pos--;
				}
				break;
190

191 192 193 194 195 196 197 198
			case '\t':
				break;

			default:
				if (!(current_key & ESCAPE_FLAG)
				    && insert(current_key)) {
					esc('@');
					mprintf("%c", current_key);
199
				}
200 201
				break;

202
			}
203 204 205
			current_key = 0;
		}
		break;
206

207 208 209 210 211
	case SH_EXEC:
		cmd_buf[cmd_len] = 0;
		_shell_exec();
		state = SH_PROMPT;
		break;
212 213
	}
}
214

215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232
const char *fromhex(const char *hex, int *v)
{
	int o = 0;

	for (; *hex; ++hex) {
		if (*hex >= '0' && *hex <= '9') {
			o = (o << 4) + (*hex - '0');
		} else if (*hex >= 'A' && *hex <= 'F') {
			o = (o << 4) + (*hex - 'A') + 10;
		} else if (*hex >= 'a' && *hex <= 'f') {
			o = (o << 4) + (*hex - 'a') + 10;
		} else {
			break;
		}
	}

	*v = o;
	return hex;
233 234
}

235 236 237
const char *fromdec(const char *dec, int *v)
{
	int o = 0;
238

239 240 241 242 243 244 245
	for (; *dec; ++dec) {
		if (*dec >= '0' && *dec <= '9') {
			o = (o * 10) + (*dec - '0');
		} else {
			break;
		}
	}
246

247 248
	*v = o;
	return dec;
249
}
250 251 252

int shell_boot_script(void)
{
253
	uint8_t next = 0;
254

255 256 257 258 259
	if (!has_eeprom)
		return -1;

	while (1) {
		cmd_len = eeprom_init_readcmd(WRPC_FMC_I2C, FMC_EEPROM_ADR,
260 261
					      (uint8_t *)cmd_buf,
					      SH_MAX_LINE_LEN, next);
262 263 264 265 266 267 268 269 270 271 272 273 274
		if (cmd_len <= 0) {
			if (next == 0)
				mprintf("Empty init script...\n");
			break;
		}
		cmd_buf[cmd_len - 1] = 0;

		mprintf("executing: %s\n", cmd_buf);
		_shell_exec();
		next = 1;
	}

	return 0;
275
}