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plugins/bcli: strip trailing whitespace appropriately

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Changelog-Fixed: Handle windows-style newlines and other trailing whitespaces correctly in bitcoin-cli interface
This commit is contained in:
Nalin Bhardwaj 2021-05-01 18:20:48 +05:30 committed by Rusty Russell
parent ff6b26b70e
commit ae06bb91ed
1 changed files with 12 additions and 5 deletions
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17
plugins/bcli.c
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@ -320,6 +320,15 @@ start_bitcoin_cli(const tal_t *ctx,
next_bcli(bcli->prio);
}
static void strip_trailing_whitespace(char *str, size_t len)
{
size_t stripped_len = len;
while (stripped_len > 0 && cisspace(str[stripped_len-1]))
stripped_len--;
str[stripped_len] = 0x00;
}
static struct command_result *command_err_bcli_badjson(struct bitcoin_cli *bcli,
const char *errmsg)
{
@ -595,8 +604,7 @@ static struct command_result *process_getrawblock(struct bitcoin_cli *bcli)
struct json_stream *response;
struct getrawblock_stash *stash = bcli->stash;
/* -1 to strip \n and steal onto the stash. */
bcli->output[bcli->output_bytes-1] = 0x00;
strip_trailing_whitespace(bcli->output, bcli->output_bytes);
stash->block_hex = tal_steal(stash, bcli->output);
response = jsonrpc_stream_success(bcli->cmd);
@ -631,9 +639,8 @@ static struct command_result *process_getblockhash(struct bitcoin_cli *bcli)
return getrawblockbyheight_notfound(bcli);
}
/* `-1` to strip the newline character. */
stash->block_hash = tal_strndup(stash, bcli->output,
bcli->output_bytes-1);
strip_trailing_whitespace(bcli->output, bcli->output_bytes);
stash->block_hash = tal_strdup(stash, bcli->output);
if (!stash->block_hash || strlen(stash->block_hash) != 64) {
return command_err_bcli_badjson(bcli, "bad blockhash");
}