Function execute_bitcoin_cli

plugins/bcli.c:160–210

Execute bitcoin-cli with pre-built command and optional stdin args. * Returns result with output and exit status. */

/* Execute bitcoin-cli with pre-built command and optional stdin args.
 * Returns result with output and exit status. */
static struct bcli_result *
execute_bitcoin_cli(const tal_t *ctx,
		    struct plugin *plugin,
		    const char **cmd,
		    const char **stdinargs)
{
	int in, from, status;
	pid_t child;
	struct bcli_result *res;

	child = pipecmdarr(&in, &from, &from, cast_const2(char **, cmd));
	if (child < 0)
		plugin_err(plugin, "%s exec failed: %s", cmd[0], strerror(errno));

	/* Send rpcpass via stdin if configured */
	if (bitcoind->rpcpass) {
		write_all(in, bitcoind->rpcpass, strlen(bitcoind->rpcpass));
		write_all(in, "\n", 1);
	}
	/* Send any additional stdin args */
	if (stdinargs) {
		for (size_t i = 0; i < tal_count(stdinargs); i++) {
			write_all(in, stdinargs[i], strlen(stdinargs[i]));
			write_all(in, "\n", 1);
		}
	}
	close(in);

	/* Read all output until EOF */
	res = tal(ctx, struct bcli_result);
	res->output = grab_fd_str(res, from);
	res->output_len = strlen(res->output);
	res->args = args_string(res, cmd, stdinargs);
	close(from);

	/* Wait for child to exit */
	while (waitpid(child, &status, 0) < 0) {
		if (errno == EINTR)
			continue;
		plugin_err(plugin, "waitpid(%s) failed: %s",
			   res->args, strerror(errno));
	}

	if (!WIFEXITED(status))
		plugin_err(plugin, "%s died with signal %i",
			   res->args, WTERMSIG(status));

	res->exitstatus = WEXITSTATUS(status);

	return res;
}

/* Synchronous execution of bitcoin-cli.
 * Returns result with output and exit status. */