static void accept_loop(FileDescriptor&& listenerDescriptor) {
auto listener = w_stm_fdopen(std::move(listenerDescriptor));
while (!stopping) {
FileDescriptor client_fd;
struct watchman_event_poll pfd[2];
int bufsize;
#ifdef HAVE_LIBGIMLI_H
if (hb) {
gimli_heartbeat_set(hb, GIMLI_HB_RUNNING);
}
#endif
pfd[0].evt = listener->getEvents();
pfd[1].evt = listener_thread_event.get();
if (w_poll_events(pfd, 2, 60000) == 0) {
if (stopping) {
break;
}
// Timed out, or error.
// Arrange to sanity check that we're working
w_check_my_sock();
continue;
}
if (stopping) {
break;
}
#ifdef HAVE_ACCEPT4
client_fd = FileDescriptor(
accept4(listener->getFileDescriptor().fd(), nullptr, 0, SOCK_CLOEXEC));
#else
client_fd =
FileDescriptor(accept(listener->getFileDescriptor().fd(), nullptr, 0));
#endif
if (!client_fd) {
continue;
}
client_fd.setCloExec();
bufsize = WATCHMAN_IO_BUF_SIZE;
setsockopt(
client_fd.fd(),
SOL_SOCKET,
SO_SNDBUF,
(void*)&bufsize,
sizeof(bufsize));
make_new_client(w_stm_fdopen(std::move(client_fd)));
}
}
bool w_cmd_realpath_root(json_ref& args, char** errmsg) {
const char *path;
if (json_array_size(args) < 2) {
ignore_result(asprintf(errmsg, "wrong number of arguments"));
return false;
}
path = json_string_value(json_array_get(args, 1));
if (!path) {
ignore_result(asprintf(errmsg, "second argument must be a string"));
return false;
}
try {
auto resolved = realPath(path);
args.array()[1] = w_string_to_json(resolved);
return true;
} catch (const std::exception &exc) {
watchman::log(watchman::DBG, "w_cmd_realpath_root: path ", path,
" does not resolve: ", exc.what(), "\n");
// We don't treat this as an error; the caller will subsequently
// fail and perform their usual error handling
return true;
}
}
// If we are running under inetd-style supervision, call this function
// to move the inetd provided socket descriptor(s) to a new descriptor
// number and remember that we can just use these when we're starting
// up the listener.
void w_listener_prep_inetd() {
if (listener_fd) {
throw std::runtime_error(
"w_listener_prep_inetd: listener_fd is already assigned");
}
listener_fd = FileDescriptor(dup(STDIN_FILENO), "dup(stdin) for listener");
}
static FileDescriptor create_pipe_server(const char* path) {
return FileDescriptor(intptr_t(CreateNamedPipe(
path,
PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
PIPE_TYPE_BYTE | PIPE_READMODE_BYTE | PIPE_REJECT_REMOTE_CLIENTS,
PIPE_UNLIMITED_INSTANCES,
WATCHMAN_IO_BUF_SIZE,
512,
0,
nullptr)));
}
static void execute_common(
struct w_query_ctx* ctx,
w_perf_t* sample,
w_query_res* res,
w_query_generator generator) {
if (ctx->query->dedup_results) {
ctx->dedup.reserve(64);
}
res->is_fresh_instance =
!ctx->since.is_timestamp && ctx->since.clock.is_fresh_instance;
if (!(res->is_fresh_instance && ctx->query->empty_on_fresh_instance)) {
if (!generator) {
generator = default_generators;
}
generator(ctx->query, ctx->root, ctx);
}
if (!ctx->resultsToRender.empty()) {
collectAll(ctx->resultsToRender.begin(), ctx->resultsToRender.end())
.then([&](Result<std::vector<Result<json_ref>>>&& results) {
auto& vec = results.value();
for (auto& item : vec) {
json_array_append_new(ctx->resultsArray, std::move(item.value()));
}
})
.get();
}
if (sample && sample->finish()) {
sample->add_root_meta(ctx->root);
sample->add_meta(
"query_execute",
json_object(
{{"fresh_instance", json_boolean(res->is_fresh_instance)},
{"num_deduped", json_integer(ctx->num_deduped)},
{"num_results", json_integer(json_array_size(ctx->resultsArray))},
{"num_walked", json_integer(ctx->getNumWalked())},
{"query", ctx->query->query_spec}}));
sample->log();
}
res->resultsArray = ctx->resultsArray;
res->dedupedFileNames = std::move(ctx->dedup);
}
// Given a target of the form "absolute_path/filename", return
// realpath(absolute_path) + filename, where realpath(absolute_path) resolves
// all the symlinks in absolute_path.
static w_string get_normalized_target(const w_string& target) {
int err;
w_assert(
w_string_path_is_absolute(target),
"get_normalized_target: path %s is not absolute\n",
target.c_str());
auto dir_name = target.dirName();
auto dir_name_real = realPath(dir_name.c_str());
err = errno;
if (dir_name_real) {
auto file_name = target.baseName();
return w_string::pathCat({dir_name_real, file_name});
}
errno = err;
return nullptr;
}
// For watch-project, take a root path string and resolve the
// containing project directory, then update the args to reflect
// that path.
// relpath will hold the path to the project dir, relative to the
// watched dir. If it is NULL it means that the project dir is
// equivalent to the watched dir.
static w_string
resolve_projpath(const json_ref& args, char** errmsg, w_string& relpath) {
const char* path;
bool enforcing;
if (json_array_size(args) < 2) {
ignore_result(asprintf(errmsg, "wrong number of arguments"));
return nullptr;
}
path = json_string_value(json_array_get(args, 1));
if (!path) {
ignore_result(asprintf(errmsg, "second argument must be a string"));
return nullptr;
}
auto resolved = realPath(path);
auto root_files = cfg_compute_root_files(&enforcing);
if (!root_files) {
ignore_result(asprintf(errmsg,
"resolve_projpath: error computing root_files configuration value, "
"consult your log file at %s for more details", log_name));
return nullptr;
}
// See if we're requesting something in a pre-existing watch
w_string_piece prefix;
w_string_piece relpiece;
if (findEnclosingRoot(resolved, prefix, relpiece)) {
relpath = relpiece.asWString();
resolved = prefix.asWString();
json_array_set_new(args, 1, w_string_to_json(resolved));
return resolved;
}
auto resolvedpiece = resolved.piece();
if (find_project_root(root_files, resolvedpiece, relpiece)) {
relpath = relpiece.asWString();
resolved = resolvedpiece.asWString();
json_array_set_new(args, 1, w_string_to_json(resolved));
return resolved;
}
if (!enforcing) {
// We'll use the path they originally requested
return resolved;
}
// Convert root files to comma delimited string for error message
auto root_files_list = cfg_pretty_print_root_files(root_files);
ignore_result(asprintf(
errmsg,
"resolve_projpath: None of the files listed in global config "
"root_files are present in path `%s` or any of its "
"parent directories. root_files is defined by the "
"`%s` config file and includes %s. "
"One or more of these files must be present in order to allow "
"a watch. Try pulling and checking out a newer version of the project?",
path,
cfg_get_global_config_file_path().c_str(),
root_files_list.c_str()));
return nullptr;
}
static FileDescriptor get_listener_socket(const char *path)
{
struct sockaddr_un un;
mode_t perms = cfg_get_perms(
"sock_access", true /* write bits */, false /* execute bits */);
FileDescriptor listener_fd;
#ifdef __APPLE__
listener_fd = w_get_listener_socket_from_launchd();
if (listener_fd) {
w_log(W_LOG_ERR, "Using socket from launchd as listening socket\n");
return listener_fd;
}
#endif
if (strlen(path) >= sizeof(un.sun_path) - 1) {
w_log(W_LOG_ERR, "%s: path is too long\n",
path);
return FileDescriptor();
}
listener_fd = FileDescriptor(socket(PF_LOCAL, SOCK_STREAM, 0), "socket");
un.sun_family = PF_LOCAL;
memcpy(un.sun_path, path, strlen(path) + 1);
unlink(path);
if (bind(listener_fd.fd(), (struct sockaddr*)&un, sizeof(un)) != 0) {
w_log(W_LOG_ERR, "bind(%s): %s\n",
path, strerror(errno));
return FileDescriptor();
}
// The permissions in the containing directory should be correct, so this
// should be correct as well. But set the permissions in any case.
if (chmod(path, perms) == -1) {
w_log(W_LOG_ERR, "chmod(%s, %#o): %s", path, perms, strerror(errno));
return FileDescriptor();
}
// Double-check that the socket has the right permissions. This can happen
// when the containing directory was created in a previous run, with a group
// the user is no longer in.
struct stat st;
if (lstat(path, &st) == -1) {
watchman::log(watchman::ERR, "lstat(", path, "): ", strerror(errno), "\n");
return FileDescriptor();
}
// This is for testing only
// (test_sock_perms.py:test_user_previously_in_sock_group). Do not document.
const char *sock_group_name = cfg_get_string("__sock_file_group", nullptr);
if (!sock_group_name) {
sock_group_name = cfg_get_string("sock_group", nullptr);
}
if (sock_group_name) {
const struct group *sock_group = w_get_group(sock_group_name);
if (!sock_group) {
return FileDescriptor();
}
if (st.st_gid != sock_group->gr_gid) {
watchman::log(
watchman::ERR,
"for socket '", path, "', gid ", st.st_gid,
" doesn't match expected gid ", sock_group->gr_gid, " (group name ",
sock_group_name, "). Ensure that you are still a member of group ",
sock_group_name, ".\n");
return FileDescriptor();
}
}
if (listen(listener_fd.fd(), 200) != 0) {
w_log(W_LOG_ERR, "listen(%s): %s\n",
path, strerror(errno));
return FileDescriptor();
}
return listener_fd;
}
static void named_pipe_accept_loop_internal(const char* path) {
HANDLE handles[2];
auto olap = OVERLAPPED();
HANDLE connected_event = CreateEvent(NULL, FALSE, TRUE, NULL);
if (!connected_event) {
w_log(
W_LOG_ERR,
"named_pipe_accept_loop_internal: CreateEvent failed: %s\n",
win32_strerror(GetLastError()));
return;
}
handles[0] = connected_event;
handles[1] = listener_thread_event;
olap.hEvent = connected_event;
w_log(W_LOG_ERR, "waiting for pipe clients on %s\n", path);
while (!stopping) {
FileDescriptor client_fd;
DWORD res;
client_fd = FileDescriptor(intptr_t(CreateNamedPipe(
path,
PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
PIPE_TYPE_BYTE | PIPE_READMODE_BYTE | PIPE_REJECT_REMOTE_CLIENTS,
PIPE_UNLIMITED_INSTANCES,
WATCHMAN_IO_BUF_SIZE,
512,
0,
nullptr)));
if (!client_fd) {
w_log(W_LOG_ERR, "CreateNamedPipe(%s) failed: %s\n",
path, win32_strerror(GetLastError()));
continue;
}
ResetEvent(connected_event);
if (!ConnectNamedPipe((HANDLE)client_fd.handle(), &olap)) {
res = GetLastError();
if (res == ERROR_PIPE_CONNECTED) {
make_new_client(w_stm_fdopen(std::move(client_fd)));
continue;
}
if (res != ERROR_IO_PENDING) {
w_log(W_LOG_ERR, "ConnectNamedPipe: %s\n",
win32_strerror(GetLastError()));
continue;
}
res = WaitForMultipleObjectsEx(2, handles, false, INFINITE, true);
if (res == WAIT_OBJECT_0 + 1) {
// Signalled to stop
CancelIoEx((HANDLE)client_fd.handle(), &olap);
continue;
}
if (res != WAIT_OBJECT_0) {
w_log(
W_LOG_ERR,
"WaitForMultipleObjectsEx: ConnectNamedPipe: "
"unexpected status %u\n",
res);
CancelIoEx((HANDLE)client_fd.handle(), &olap);
continue;
}
}
make_new_client(w_stm_fdopen(std::move(client_fd)));
}
}
KQueueWatcher::KQueueWatcher(w_root_t* root)
: Watcher("kqueue", 0),
maps_(maps(root->config.getInt(CFG_HINT_NUM_DIRS, HINT_NUM_DIRS))) {
kq_fd = FileDescriptor(kqueue(), "kqueue");
kq_fd.setCloExec();
}
