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plugins/bcli: use -rpcwait to simplify waiting for bitcoind to warm up #7967

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plugins/bcli: use -rpcwait to simplify waiting for bitcoind to warm up #7967

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74 changes: 30 additions & 44 deletions plugins/bcli.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1035,59 +1035,45 @@ static void parse_getnetworkinfo_result(struct plugin *p, const char *buf)

static void wait_and_check_bitcoind(struct plugin *p)
{
int in, from, status, ret;
int in, from, status;
pid_t child;
const char **cmd = gather_args(bitcoind, "getnetworkinfo", NULL);
bool printed = false;
const char **cmd = gather_args(
bitcoind, "-rpcwait", "-rpcwaittimeout=30", "getnetworkinfo", NULL);
char *output = NULL;

for (;;) {
tal_free(output);
child = pipecmdarr(&in, &from, &from, cast_const2(char **, cmd));

child = pipecmdarr(&in, &from, &from, cast_const2(char **, cmd));
if (bitcoind->rpcpass)
write_all(in, bitcoind->rpcpass, strlen(bitcoind->rpcpass));

if (bitcoind->rpcpass)
write_all(in, bitcoind->rpcpass, strlen(bitcoind->rpcpass));
close(in);

close(in);
if (child < 0) {
if (errno == ENOENT)
bitcoind_failure(
p,
"bitcoin-cli not found. Is bitcoin-cli "
"(part of Bitcoin Core) available in your PATH?");
plugin_err(p, "%s exec failed: %s", cmd[0], strerror(errno));
}

if (child < 0) {
if (errno == ENOENT)
bitcoind_failure(p, "bitcoin-cli not found. Is bitcoin-cli "
"(part of Bitcoin Core) available in your PATH?");
plugin_err(p, "%s exec failed: %s", cmd[0], strerror(errno));
}
output = grab_fd(cmd, from);

output = grab_fd(cmd, from);

while ((ret = waitpid(child, &status, 0)) < 0 && errno == EINTR);
if (ret != child)
bitcoind_failure(p, tal_fmt(bitcoind, "Waiting for %s: %s",
cmd[0], strerror(errno)));
if (!WIFEXITED(status))
bitcoind_failure(p, tal_fmt(bitcoind, "Death of %s: signal %i",
cmd[0], WTERMSIG(status)));

if (WEXITSTATUS(status) == 0)
break;

/* bitcoin/src/rpc/protocol.h:
* RPC_IN_WARMUP = -28, //!< Client still warming up
*/
if (WEXITSTATUS(status) != 28) {
if (WEXITSTATUS(status) == 1)
bitcoind_failure(p, "Could not connect to bitcoind using"
" bitcoin-cli. Is bitcoind running?");
bitcoind_failure(p, tal_fmt(bitcoind, "%s exited with code %i: %s",
cmd[0], WEXITSTATUS(status), output));
}
waitpid(child, &status, 0);

if (!printed) {
plugin_log(p, LOG_UNUSUAL,
"Waiting for bitcoind to warm up...");
printed = true;
}
sleep(1);
if (!WIFEXITED(status))
bitcoind_failure(p, tal_fmt(bitcoind, "Death of %s: signal %i",
cmd[0], WTERMSIG(status)));

if (WEXITSTATUS(status) != 0) {
if (WEXITSTATUS(status) == 1)
bitcoind_failure(p,
"RPC connection timed out. Could "
"not connect to bitcoind using "
"bitcoin-cli. Is bitcoind running?");
bitcoind_failure(p,
tal_fmt(bitcoind, "%s exited with code %i: %s",
cmd[0], WEXITSTATUS(status), output));
}

parse_getnetworkinfo_result(p, output);
Expand Down