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New 'w+' command, to write a string and seek at the end ##shell

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Sergi Àlvarez i Capilla 2022-02-13 23:40:57 +01:00 committed by pancake
parent 4145077fb9
commit 2e99650c15
1 changed files with 16 additions and 9 deletions
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25
libr/core/cmd_write.c
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@ -10,6 +10,7 @@ static const char *help_msg_w[] = {
"Usage:","w[x] [str] [<file] [<<EOF] [@addr]","",
"w","[1248][+-][n]","increment/decrement byte,word..",
"w"," foobar","write string 'foobar'",
"w+","string","write string and seek at the end of it",
"w0"," [len]","write 'len' bytes with value 0x00",
"w6","[de] base64/hex","write base64 [d]ecoded or [e]ncoded string",
"wa","[?] push ebp","write opcode, separated by ';' (use '\"' around the command)",
@ -1406,22 +1407,19 @@ static int wc_handler_old(void *data, const char *input) {
return 0;
}
static void w_handler_common(RCore *core, const char *input) {
static int w_handler(RCore *core, const char *input) {
int wseek = r_config_get_i (core->config, "cfg.wseek");
char *str = strdup (input);
/* write string */
int len = r_str_unescape (str);
// handle charset logic here
if (!r_core_write_at (core, core->offset, (const ut8 *)str, len)) {
cmd_write_fail (core);
}
free (str);
WSEEK (core, len);
r_core_block_read (core);
}
static int w_handler_old(void *data, const char *input) {
RCore *core = (RCore *)data;
w_handler_common (core, input);
core->num->value = len;
return 0;
}
@ -2135,6 +2133,7 @@ static int cmd_write(void *data, const char *input) {
wA_handler_old (core, input + 1);
break;
case ' ': // "w"
case '+': // "w+"
{
size_t len = core->blocksize;
const char *curcs = r_config_get (core->config, "cfg.charset");
@ -2143,23 +2142,31 @@ static int cmd_write(void *data, const char *input) {
r_str_trim_args (str);
r_str_trim_tail (str);
ut64 addr = core->offset;
if (R_STR_ISEMPTY (curcs)) {
w_handler_old (core, str + 1);
core->num->value = 0;
w_handler (core, str + 1);
addr += core->num->value;
} else {
if (len > 0) {
size_t in_len = strlen (str + 1);
int max = core->print->charset->encode_maxkeylen;
int out_len = in_len * max;
int new_len = 0;
ut8 *out = malloc (in_len * max); //suppose in len = out len TODO: change it
if (out) {
*out = 0;
r_charset_decode_str (core->print->charset, out, out_len, (const ut8*) str + 1, in_len);
w_handler_old (core, (const char *)out);
new_len = r_charset_decode_str (core->print->charset, out, out_len, (const ut8*) str + 1, in_len);
w_handler (core, (const char *)out);
free (out);
}
addr += new_len;
}
}
free (str);
if (*input == '+') {
r_core_seek (core, addr, true);
}
break;
}
case 'z': // "wz"