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/*
* process_esacpe_sequence.c
*
* Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <common.h>
#include <fs.h>
#include <globalvar.h>
#include <libbb.h>
#include <shell.h>
int process_escape_sequence(const char *source, char *dest, int destlen)
{
int i = 0;
while (*source) {
if (*source == '\\') {
switch (*(source + 1)) {
case 0:
return 0;
case '\\':
dest[i++] = '\\';
break;
case 'a':
dest[i++] = '\a';
break;
case 'b':
dest[i++] = '\b';
break;
case 'n':
dest[i++] = '\n';
break;
case 'r':
dest[i++] = '\r';
break;
case 't':
dest[i++] = '\t';
break;
case 'f':
dest[i++] = '\f';
break;
case 'e':
dest[i++] = 0x1b;
break;
case 'h':
i += snprintf(dest + i, destlen - i, "%s", barebox_get_model());
break;
case 'u':
if (IS_ENABLED(CONFIG_GLOBALVAR))
i += snprintf(dest + i, destlen - i, "%s",
dev_get_param(&global_device, "user"));
break;
case 'w':
i += snprintf(dest + i, destlen - i, "%s", getcwd());
break;
case '$':
if (*(source + 2) == '?') {
i += snprintf(dest + i, destlen - i, "%d", shell_get_last_return_code());
source++;
break;
}
default:
dest[i++] = '\\';
dest[i++] = *(source + 1);
}
source++;
} else
dest[i++] = *source;
source++;
if (!(destlen - i))
break;
}
dest[i] = 0;
return 0;
}
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