bool inot_root_init(watchman_global_watcher_t watcher, w_root_t *root,
char **errmsg) {
struct inot_root_state *state;
unused_parameter(watcher);
state = calloc(1, sizeof(*state));
if (!state) {
*errmsg = strdup("out of memory");
return false;
}
root->watch = state;
pthread_mutex_init(&state->lock, NULL);
#ifdef HAVE_INOTIFY_INIT1
state->infd = inotify_init1(IN_CLOEXEC);
#else
state->infd = inotify_init();
#endif
if (state->infd == -1) {
ignore_result(asprintf(errmsg, "watch(%.*s): inotify_init error: %s",
root->root_path->len, root->root_path->buf, inot_strerror(errno)));
w_log(W_LOG_ERR, "%s\n", *errmsg);
return false;
}
w_set_cloexec(state->infd);
state->wd_to_name = w_ht_new(HINT_NUM_DIRS, &w_ht_string_val_funcs);
state->move_map = w_ht_new(2, &move_hash_funcs);
return true;
}
bool kqueue_root_init(watchman_global_watcher_t watcher, w_root_t *root,
char **errmsg) {
struct kqueue_root_state *state;
unused_parameter(watcher);
state = calloc(1, sizeof(*state));
if (!state) {
*errmsg = strdup("out of memory");
return false;
}
root->watch = state;
pthread_mutex_init(&state->lock, NULL);
state->name_to_fd = w_ht_new(HINT_NUM_DIRS, &name_to_fd_funcs);
state->fd_to_name = w_ht_new(HINT_NUM_DIRS, &w_ht_string_val_funcs);
state->kq_fd = kqueue();
if (state->kq_fd == -1) {
ignore_result(asprintf(errmsg, "watch(%.*s): kqueue() error: %s",
root->root_path->len, root->root_path->buf, strerror(errno)));
w_log(W_LOG_ERR, "%s\n", *errmsg);
return false;
}
w_set_cloexec(state->kq_fd);
return true;
}
// Caller must hold spawn_lock
static void insert_running_pid(pid_t pid, w_root_t *root)
{
if (!running_kids) {
running_kids = w_ht_new(2, NULL);
}
w_ht_set(running_kids, pid, w_ht_ptr_val(root));
}
void w_capability_register(const char *name) {
if (!capabilities) {
capabilities = w_ht_new(128, &w_ht_string_funcs);
}
w_ht_set(capabilities,
w_ht_ptr_val(w_string_new(name)),
true);
}
void w_register_command(struct watchman_command_handler_def *defs)
{
if (!command_funcs) {
command_funcs = w_ht_new(16, &w_ht_string_funcs);
}
w_ht_set(command_funcs,
w_ht_ptr_val(w_string_new(defs->name)),
w_ht_ptr_val(defs));
}
void register_commands(struct watchman_command_handler_def *defs)
{
int i;
command_funcs = w_ht_new(16, &w_ht_string_funcs);
for (i = 0; defs[i].name; i++) {
w_ht_set(command_funcs,
(w_ht_val_t)w_string_new(defs[i].name),
(w_ht_val_t)defs[i].func);
}
w_query_init_all();
}
void w_register_command(struct watchman_command_handler_def *defs)
{
char capname[128];
if (!command_funcs) {
command_funcs = w_ht_new(16, &w_ht_string_funcs);
}
w_ht_set(command_funcs,
w_ht_ptr_val(w_string_new(defs->name)),
w_ht_ptr_val(defs));
snprintf(capname, sizeof(capname), "cmd-%s", defs->name);
w_capability_register(capname);
}
static struct watchman_client *make_new_client(w_stm_t stm) {
struct watchman_client *client;
pthread_attr_t attr;
pthread_t thr;
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
client = calloc(1, sizeof(*client));
if (!client) {
pthread_attr_destroy(&attr);
return NULL;
}
client->stm = stm;
w_log(W_LOG_DBG, "accepted client:stm=%p\n", client->stm);
if (!w_json_buffer_init(&client->reader)) {
// FIXME: error handling
}
if (!w_json_buffer_init(&client->writer)) {
// FIXME: error handling
}
client->ping = w_event_make();
if (!client->ping) {
// FIXME: error handling
}
client->subscriptions = w_ht_new(2, &subscription_hash_funcs);
pthread_mutex_lock(&w_client_lock);
w_ht_set(clients, w_ht_ptr_val(client), w_ht_ptr_val(client));
pthread_mutex_unlock(&w_client_lock);
// Start a thread for the client.
// We used to use libevent for this, but we have
// a low volume of concurrent clients and the json
// parse/encode APIs are not easily used in a non-blocking
// server architecture.
if (pthread_create(&thr, &attr, client_thread, client)) {
// It didn't work out, sorry!
pthread_mutex_lock(&w_client_lock);
w_ht_del(clients, w_ht_ptr_val(client));
pthread_mutex_unlock(&w_client_lock);
client_delete(client);
}
pthread_attr_destroy(&attr);
return client;
}
bool w_query_register_expression_parser(
const char *term,
w_query_expr_parser parser)
{
w_string_t *name = w_string_new(term);
if (!name) {
return false;
}
if (!term_hash) {
term_hash = w_ht_new(32, &w_ht_string_funcs);
}
return w_ht_set(term_hash, w_ht_ptr_val(name), w_ht_ptr_val(parser));
}
bool w_query_register_expression_parser(
const char *term,
w_query_expr_parser parser)
{
char capname[128];
w_string_t *name = w_string_new(term);
if (!name) {
return false;
}
snprintf(capname, sizeof(capname), "term-%s", term);
w_capability_register(capname);
if (!term_hash) {
term_hash = w_ht_new(32, &w_ht_string_funcs);
}
return w_ht_set(term_hash, w_ht_ptr_val(name), w_ht_ptr_val(parser));
}
bool w_start_listener(const char *path)
{
struct sockaddr_un un;
pthread_t thr;
pthread_attr_t attr;
pthread_mutexattr_t mattr;
struct sigaction sa;
sigset_t sigset;
#ifdef HAVE_LIBGIMLI_H
volatile struct gimli_heartbeat *hb = NULL;
#endif
pthread_mutexattr_init(&mattr);
pthread_mutexattr_settype(&mattr, PTHREAD_MUTEX_RECURSIVE);
pthread_mutex_init(&w_client_lock, &mattr);
pthread_mutexattr_destroy(&mattr);
#ifdef HAVE_LIBGIMLI_H
hb = gimli_heartbeat_attach();
#endif
#ifdef HAVE_KQUEUE
{
struct rlimit limit;
int mib[2] = { CTL_KERN,
#ifdef KERN_MAXFILESPERPROC
KERN_MAXFILESPERPROC
#else
KERN_MAXFILES
#endif
};
int maxperproc;
size_t len;
len = sizeof(maxperproc);
sysctl(mib, 2, &maxperproc, &len, NULL, 0);
getrlimit(RLIMIT_NOFILE, &limit);
w_log(W_LOG_ERR, "file limit is %" PRIu64
" kern.maxfilesperproc=%i\n",
limit.rlim_cur, maxperproc);
if (limit.rlim_cur != RLIM_INFINITY &&
maxperproc > 0 &&
limit.rlim_cur < (rlim_t)maxperproc) {
limit.rlim_cur = maxperproc;
if (setrlimit(RLIMIT_NOFILE, &limit)) {
w_log(W_LOG_ERR,
"failed to raise limit to %" PRIu64 " (%s).\n",
limit.rlim_cur,
strerror(errno));
} else {
w_log(W_LOG_ERR,
"raised file limit to %" PRIu64 "\n",
limit.rlim_cur);
}
}
getrlimit(RLIMIT_NOFILE, &limit);
if (limit.rlim_cur < 10240) {
w_log(W_LOG_ERR,
"Your file descriptor limit is very low (%" PRIu64 "), "
"please consult the watchman docs on raising the limits\n",
limit.rlim_cur);
}
}
#endif
if (strlen(path) >= sizeof(un.sun_path) - 1) {
w_log(W_LOG_ERR, "%s: path is too long\n",
path);
return false;
}
signal(SIGPIPE, SIG_IGN);
/* allow SIGUSR1 and SIGCHLD to wake up a blocked thread, without restarting
* syscalls */
memset(&sa, 0, sizeof(sa));
sa.sa_handler = wakeme;
sa.sa_flags = 0;
sigaction(SIGUSR1, &sa, NULL);
sigaction(SIGCHLD, &sa, NULL);
// Block SIGCHLD everywhere
sigemptyset(&sigset);
sigaddset(&sigset, SIGCHLD);
sigprocmask(SIG_BLOCK, &sigset, NULL);
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
listener_fd = socket(PF_LOCAL, SOCK_STREAM, 0);
if (listener_fd == -1) {
w_log(W_LOG_ERR, "socket: %s\n",
strerror(errno));
return false;
}
un.sun_family = PF_LOCAL;
strcpy(un.sun_path, path);
if (bind(listener_fd, (struct sockaddr*)&un, sizeof(un)) != 0) {
w_log(W_LOG_ERR, "bind(%s): %s\n",
path, strerror(errno));
close(listener_fd);
return false;
}
if (listen(listener_fd, 200) != 0) {
w_log(W_LOG_ERR, "listen(%s): %s\n",
path, strerror(errno));
close(listener_fd);
return false;
}
w_set_cloexec(listener_fd);
if (pthread_create(&reaper_thread, NULL, child_reaper, NULL)) {
w_log(W_LOG_FATAL, "pthread_create(reaper): %s\n",
strerror(errno));
return false;
}
if (!clients) {
clients = w_ht_new(2, &client_hash_funcs);
}
// Wire up the command handlers
register_commands(commands);
w_state_load();
#ifdef HAVE_LIBGIMLI_H
if (hb) {
gimli_heartbeat_set(hb, GIMLI_HB_RUNNING);
}
w_set_nonblock(listener_fd);
#endif
// Now run the dispatch
while (true) {
int client_fd;
struct watchman_client *client;
struct pollfd pfd;
int bufsize;
#ifdef HAVE_LIBGIMLI_H
if (hb) {
gimli_heartbeat_set(hb, GIMLI_HB_RUNNING);
}
#endif
pfd.events = POLLIN;
pfd.fd = listener_fd;
poll(&pfd, 1, 10000);
client_fd = accept(listener_fd, NULL, 0);
if (client_fd == -1) {
continue;
}
w_set_cloexec(client_fd);
bufsize = WATCHMAN_IO_BUF_SIZE;
setsockopt(client_fd, SOL_SOCKET, SO_SNDBUF, &bufsize, sizeof(bufsize));
client = calloc(1, sizeof(*client));
client->fd = client_fd;
if (!w_json_buffer_init(&client->reader)) {
// FIXME: error handling
}
if (!w_json_buffer_init(&client->writer)) {
// FIXME: error handling
}
if (pipe(client->ping)) {
// FIXME: error handling
}
client->subscriptions = w_ht_new(2, &subscription_hash_funcs);
w_set_cloexec(client->ping[0]);
w_set_nonblock(client->ping[0]);
w_set_cloexec(client->ping[1]);
w_set_nonblock(client->ping[1]);
pthread_mutex_lock(&w_client_lock);
w_ht_set(clients, client->fd, (w_ht_val_t)client);
pthread_mutex_unlock(&w_client_lock);
// Start a thread for the client.
// We used to use libevent for this, but we have
// a low volume of concurrent clients and the json
// parse/encode APIs are not easily used in a non-blocking
// server architecture.
if (pthread_create(&thr, &attr, client_thread, client)) {
// It didn't work out, sorry!
pthread_mutex_lock(&w_client_lock);
w_ht_del(clients, client->fd);
pthread_mutex_unlock(&w_client_lock);
}
}
pthread_attr_destroy(&attr);
return true;
}
bool w_start_listener(const char *path)
{
pthread_mutexattr_t mattr;
#ifndef _WIN32
struct sigaction sa;
sigset_t sigset;
#endif
void *ignored;
#ifdef HAVE_LIBGIMLI_H
volatile struct gimli_heartbeat *hb = NULL;
#endif
struct timeval tv;
int n_clients = 0;
listener_thread = pthread_self();
pthread_mutexattr_init(&mattr);
pthread_mutexattr_settype(&mattr, PTHREAD_MUTEX_RECURSIVE);
pthread_mutex_init(&w_client_lock, &mattr);
pthread_mutexattr_destroy(&mattr);
#ifdef HAVE_LIBGIMLI_H
hb = gimli_heartbeat_attach();
#endif
#if defined(HAVE_KQUEUE) || defined(HAVE_FSEVENTS)
{
struct rlimit limit;
# ifndef __OpenBSD__
int mib[2] = { CTL_KERN,
# ifdef KERN_MAXFILESPERPROC
KERN_MAXFILESPERPROC
# else
KERN_MAXFILES
# endif
};
# endif
int maxperproc;
getrlimit(RLIMIT_NOFILE, &limit);
# ifndef __OpenBSD__
size_t len;
len = sizeof(maxperproc);
sysctl(mib, 2, &maxperproc, &len, NULL, 0);
w_log(W_LOG_ERR, "file limit is %" PRIu64
" kern.maxfilesperproc=%i\n",
limit.rlim_cur, maxperproc);
# else
maxperproc = limit.rlim_max;
w_log(W_LOG_ERR, "openfiles-cur is %" PRIu64
" openfiles-max=%i\n",
limit.rlim_cur, maxperproc);
# endif
if (limit.rlim_cur != RLIM_INFINITY &&
maxperproc > 0 &&
limit.rlim_cur < (rlim_t)maxperproc) {
limit.rlim_cur = maxperproc;
if (setrlimit(RLIMIT_NOFILE, &limit)) {
w_log(W_LOG_ERR,
"failed to raise limit to %" PRIu64 " (%s).\n",
limit.rlim_cur,
strerror(errno));
} else {
w_log(W_LOG_ERR,
"raised file limit to %" PRIu64 "\n",
limit.rlim_cur);
}
}
getrlimit(RLIMIT_NOFILE, &limit);
#ifndef HAVE_FSEVENTS
if (limit.rlim_cur < 10240) {
w_log(W_LOG_ERR,
"Your file descriptor limit is very low (%" PRIu64 "), "
"please consult the watchman docs on raising the limits\n",
limit.rlim_cur);
}
#endif
}
#endif
proc_pid = (int)getpid();
if (gettimeofday(&tv, NULL) == -1) {
w_log(W_LOG_ERR, "gettimeofday failed: %s\n", strerror(errno));
return false;
}
proc_start_time = (uint64_t)tv.tv_sec;
#ifndef _WIN32
signal(SIGPIPE, SIG_IGN);
/* allow SIGUSR1 and SIGCHLD to wake up a blocked thread, without restarting
* syscalls */
memset(&sa, 0, sizeof(sa));
sa.sa_handler = wakeme;
sa.sa_flags = 0;
sigaction(SIGUSR1, &sa, NULL);
sigaction(SIGCHLD, &sa, NULL);
// Block SIGCHLD everywhere
sigemptyset(&sigset);
sigaddset(&sigset, SIGCHLD);
sigprocmask(SIG_BLOCK, &sigset, NULL);
listener_fd = get_listener_socket(path);
if (listener_fd == -1) {
return false;
}
w_set_cloexec(listener_fd);
#endif
if (pthread_create(&reaper_thread, NULL, child_reaper, NULL)) {
w_log(W_LOG_FATAL, "pthread_create(reaper): %s\n",
strerror(errno));
return false;
}
if (!clients) {
clients = w_ht_new(2, &client_hash_funcs);
}
w_state_load();
#ifdef HAVE_LIBGIMLI_H
if (hb) {
gimli_heartbeat_set(hb, GIMLI_HB_RUNNING);
} else {
w_setup_signal_handlers();
}
#else
w_setup_signal_handlers();
#endif
w_set_nonblock(listener_fd);
// Now run the dispatch
#ifndef _WIN32
accept_loop();
#else
named_pipe_accept_loop(path);
#endif
#ifndef _WIN32
/* close out some resources to persuade valgrind to run clean */
close(listener_fd);
listener_fd = -1;
#endif
// Wait for clients, waking any sleeping clients up in the process
do {
w_ht_iter_t iter;
pthread_mutex_lock(&w_client_lock);
n_clients = w_ht_size(clients);
if (w_ht_first(clients, &iter)) do {
struct watchman_client *client = w_ht_val_ptr(iter.value);
w_event_set(client->ping);
} while (w_ht_next(clients, &iter));
pthread_mutex_unlock(&w_client_lock);
w_log(W_LOG_ERR, "waiting for %d clients to terminate\n", n_clients);
usleep(2000);
} while (n_clients > 0);
w_root_free_watched_roots();
pthread_join(reaper_thread, &ignored);
cfg_shutdown();
return true;
}
static int posix_spawn_common(
bool search_path,
pid_t *pid, const char *path,
const posix_spawn_file_actions_t *file_actions,
const posix_spawnattr_t *attrp,
char *const argv[], char *const envp[]) {
STARTUPINFO sinfo;
SECURITY_ATTRIBUTES sec;
PROCESS_INFORMATION pinfo;
char *cmdbuf;
char *env_block;
DWORD create_flags = CREATE_NO_WINDOW;
int ret;
int i;
unused_parameter(envp); // FIXME
cmdbuf = build_command_line(argv);
if (!cmdbuf) {
return ENOMEM;
}
env_block = make_env_block(envp);
if (!env_block) {
free(cmdbuf);
return ENOMEM;
}
memset(&sinfo, 0, sizeof(sinfo));
sinfo.cb = sizeof(sinfo);
sinfo.dwFlags = STARTF_USESTDHANDLES|STARTF_USESHOWWINDOW;
sinfo.wShowWindow = SW_HIDE;
memset(&sec, 0, sizeof(sec));
sec.nLength = sizeof(sec);
sec.bInheritHandle = TRUE;
memset(&pinfo, 0, sizeof(pinfo));
if (attrp->flags & POSIX_SPAWN_SETPGROUP) {
create_flags |= CREATE_NEW_PROCESS_GROUP;
}
// Process any dup(2) actions
for (i = 0; i < file_actions->ndups; i++) {
struct _posix_spawn_file_dup *dup = &file_actions->dups[i];
HANDLE *target = NULL;
DWORD err;
switch (dup->target_fd) {
case 0:
target = &sinfo.hStdInput;
break;
case 1:
target = &sinfo.hStdOutput;
break;
case 2:
target = &sinfo.hStdError;
break;
}
if (!target) {
w_log(W_LOG_ERR, "posix_spawn: can't target fd outside range [0-2]\n");
ret = ENOSYS;
goto done;
}
if (*target) {
CloseHandle(*target);
*target = INVALID_HANDLE_VALUE;
}
if (!DuplicateHandle(GetCurrentProcess(), dup->local_handle,
GetCurrentProcess(), target, 0,
TRUE, DUPLICATE_SAME_ACCESS)) {
err = GetLastError();
w_log(W_LOG_ERR, "posix_spawn: failed to duplicate handle: %s\n",
win32_strerror(err));
ret = map_win32_err(err);
goto done;
}
}
// Process any file opening actions
for (i = 0; i < file_actions->nopens; i++) {
struct _posix_spawn_file_open *op = &file_actions->opens[i];
HANDLE h;
HANDLE *target = NULL;
switch (op->target_fd) {
case 0:
target = &sinfo.hStdInput;
break;
case 1:
target = &sinfo.hStdOutput;
break;
case 2:
target = &sinfo.hStdError;
break;
}
if (!target) {
w_log(W_LOG_ERR, "posix_spawn: can't target fd outside range [0-2]\n");
ret = ENOSYS;
goto done;
}
h = w_handle_open(op->name, op->flags & ~O_CLOEXEC);
if (h == INVALID_HANDLE_VALUE) {
ret = errno;
w_log(W_LOG_ERR, "posix_spawn: failed to open %s:\n",
op->name);
goto done;
}
if (*target) {
CloseHandle(*target);
}
*target = h;
}
if (!sinfo.hStdInput) {
sinfo.hStdInput = GetStdHandle(STD_INPUT_HANDLE);
}
if (!sinfo.hStdOutput) {
sinfo.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE);
}
if (!sinfo.hStdError) {
sinfo.hStdError = GetStdHandle(STD_ERROR_HANDLE);
}
if (!CreateProcess(search_path ? NULL : path,
cmdbuf, &sec, &sec, TRUE, create_flags, env_block,
attrp->working_dir, &sinfo, &pinfo)) {
w_log(W_LOG_ERR, "CreateProcess: `%s`: (cwd=%s) %s\n", cmdbuf,
attrp->working_dir ? attrp->working_dir : "<process cwd>",
win32_strerror(GetLastError()));
ret = EACCES;
} else {
*pid = (pid_t)pinfo.dwProcessId;
// Record the pid -> handle mapping for later wait/reap
pthread_mutex_lock(&child_proc_lock);
if (!child_procs) {
child_procs = w_ht_new(2, NULL);
}
w_ht_set(child_procs, pinfo.dwProcessId, w_ht_ptr_val(pinfo.hProcess));
pthread_mutex_unlock(&child_proc_lock);
CloseHandle(pinfo.hThread);
ret = 0;
}
done:
free(cmdbuf);
free(env_block);
// If we manufactured any handles, close them out now
if (sinfo.hStdInput != GetStdHandle(STD_INPUT_HANDLE)) {
CloseHandle(sinfo.hStdInput);
}
if (sinfo.hStdOutput != GetStdHandle(STD_OUTPUT_HANDLE)) {
CloseHandle(sinfo.hStdOutput);
}
if (sinfo.hStdError != GetStdHandle(STD_ERROR_HANDLE)) {
CloseHandle(sinfo.hStdError);
}
return ret;
}
bool w_start_listener(const char *path)
{
#ifndef _WIN32
struct sigaction sa;
sigset_t sigset;
#endif
void *ignored;
listener_thread = pthread_self();
#ifdef HAVE_LIBGIMLI_H
hb = gimli_heartbeat_attach();
#endif
#if defined(HAVE_KQUEUE) || defined(HAVE_FSEVENTS)
{
struct rlimit limit;
# ifndef __OpenBSD__
int mib[2] = { CTL_KERN,
# ifdef KERN_MAXFILESPERPROC
KERN_MAXFILESPERPROC
# else
KERN_MAXFILES
# endif
};
# endif
int maxperproc;
getrlimit(RLIMIT_NOFILE, &limit);
# ifndef __OpenBSD__
{
size_t len;
len = sizeof(maxperproc);
sysctl(mib, 2, &maxperproc, &len, NULL, 0);
w_log(W_LOG_ERR, "file limit is %" PRIu64
" kern.maxfilesperproc=%i\n",
limit.rlim_cur, maxperproc);
}
# else
maxperproc = limit.rlim_max;
w_log(W_LOG_ERR, "openfiles-cur is %" PRIu64
" openfiles-max=%i\n",
limit.rlim_cur, maxperproc);
# endif
if (limit.rlim_cur != RLIM_INFINITY &&
maxperproc > 0 &&
limit.rlim_cur < (rlim_t)maxperproc) {
limit.rlim_cur = maxperproc;
if (setrlimit(RLIMIT_NOFILE, &limit)) {
w_log(W_LOG_ERR,
"failed to raise limit to %" PRIu64 " (%s).\n",
limit.rlim_cur,
strerror(errno));
} else {
w_log(W_LOG_ERR,
"raised file limit to %" PRIu64 "\n",
limit.rlim_cur);
}
}
getrlimit(RLIMIT_NOFILE, &limit);
#ifndef HAVE_FSEVENTS
if (limit.rlim_cur < 10240) {
w_log(W_LOG_ERR,
"Your file descriptor limit is very low (%" PRIu64 "), "
"please consult the watchman docs on raising the limits\n",
limit.rlim_cur);
}
#endif
}
#endif
#ifndef _WIN32
signal(SIGPIPE, SIG_IGN);
/* allow SIGUSR1 and SIGCHLD to wake up a blocked thread, without restarting
* syscalls */
memset(&sa, 0, sizeof(sa));
sa.sa_handler = wakeme;
sa.sa_flags = 0;
sigaction(SIGUSR1, &sa, NULL);
sigaction(SIGCHLD, &sa, NULL);
// Block SIGCHLD everywhere
sigemptyset(&sigset);
sigaddset(&sigset, SIGCHLD);
sigprocmask(SIG_BLOCK, &sigset, NULL);
listener_fd = get_listener_socket(path);
if (listener_fd == -1) {
return false;
}
w_set_cloexec(listener_fd);
#endif
if (!clients) {
clients = w_ht_new(2, NULL);
}
#ifdef HAVE_LIBGIMLI_H
if (hb) {
gimli_heartbeat_set(hb, GIMLI_HB_RUNNING);
} else {
w_setup_signal_handlers();
}
#else
w_setup_signal_handlers();
#endif
w_set_nonblock(listener_fd);
// Now run the dispatch
#ifndef _WIN32
accept_loop();
#else
named_pipe_accept_loop(path);
#endif
#ifndef _WIN32
/* close out some resources to persuade valgrind to run clean */
close(listener_fd);
listener_fd = -1;
#endif
// Wait for clients, waking any sleeping clients up in the process
{
int interval = 2000;
int last_count = 0, n_clients = 0;
const int max_interval = 1000000; // 1 second
do {
w_ht_iter_t iter;
pthread_mutex_lock(&w_client_lock);
n_clients = w_ht_size(clients);
if (w_ht_first(clients, &iter)) do {
struct watchman_client *client = w_ht_val_ptr(iter.value);
w_event_set(client->ping);
#ifndef _WIN32
// If we've been waiting around for a while, interrupt
// the client thread; it may be blocked on a write
if (interval >= max_interval) {
pthread_kill(client->thread_handle, SIGUSR1);
}
#endif
} while (w_ht_next(clients, &iter));
pthread_mutex_unlock(&w_client_lock);
if (n_clients != last_count) {
w_log(W_LOG_ERR, "waiting for %d clients to terminate\n", n_clients);
}
usleep(interval);
interval = MIN(interval * 2, max_interval);
} while (n_clients > 0);
}
pthread_join(reaper_thread, &ignored);
cfg_shutdown();
return true;
}
void derived_client_ctor(struct watchman_client *ptr) {
struct watchman_user_client *client = (struct watchman_user_client *)ptr;
client->subscriptions = w_ht_new(2, &subscription_hash_funcs);
}
/* subscribe /root subname {query}
* Subscribes the client connection to the specified root. */
static void cmd_subscribe(struct watchman_client *client, json_t *args)
{
w_root_t *root;
struct watchman_client_subscription *sub;
json_t *resp;
const char *name;
json_t *jfield_list;
w_query *query;
json_t *query_spec;
struct w_query_field_list field_list;
char *errmsg;
int defer = true; /* can't use bool because json_unpack requires int */
json_t *defer_list = NULL;
json_t *drop_list = NULL;
if (json_array_size(args) != 4) {
send_error_response(client, "wrong number of arguments for subscribe");
return;
}
root = resolve_root_or_err(client, args, 1, true);
if (!root) {
return;
}
name = json_string_value(json_array_get(args, 2));
if (!name) {
send_error_response(client,
"expected 2nd parameter to be subscription name");
goto done;
}
query_spec = json_array_get(args, 3);
jfield_list = json_object_get(query_spec, "fields");
if (!parse_field_list(jfield_list, &field_list, &errmsg)) {
send_error_response(client, "invalid field list: %s", errmsg);
free(errmsg);
goto done;
}
query = w_query_parse(root, query_spec, &errmsg);
if (!query) {
send_error_response(client, "failed to parse query: %s", errmsg);
free(errmsg);
goto done;
}
json_unpack(query_spec, "{s?:o}", "defer", &defer_list);
if (defer_list && !json_is_array(defer_list)) {
send_error_response(client, "defer field must be an array of strings");
goto done;
}
json_unpack(query_spec, "{s?:o}", "drop", &drop_list);
if (drop_list && !json_is_array(drop_list)) {
send_error_response(client, "drop field must be an array of strings");
goto done;
}
sub = calloc(1, sizeof(*sub));
if (!sub) {
send_error_response(client, "no memory!");
goto done;
}
sub->name = w_string_new(name);
sub->query = query;
json_unpack(query_spec, "{s?:b}", "defer_vcs", &defer);
sub->vcs_defer = defer;
if (drop_list || defer_list) {
size_t i;
sub->drop_or_defer = w_ht_new(2, &w_ht_string_funcs);
if (defer_list) {
for (i = 0; i < json_array_size(defer_list); i++) {
w_ht_replace(sub->drop_or_defer,
w_ht_ptr_val(w_string_new(json_string_value(
json_array_get(defer_list, i)))), false);
}
}
if (drop_list) {
for (i = 0; i < json_array_size(drop_list); i++) {
w_ht_replace(sub->drop_or_defer,
w_ht_ptr_val(w_string_new(json_string_value(
json_array_get(drop_list, i)))), true);
}
}
}
memcpy(&sub->field_list, &field_list, sizeof(field_list));
sub->root = root;
pthread_mutex_lock(&w_client_lock);
w_ht_replace(client->subscriptions, w_ht_ptr_val(sub->name),
w_ht_ptr_val(sub));
pthread_mutex_unlock(&w_client_lock);
resp = make_response();
annotate_with_clock(root, resp);
set_prop(resp, "subscribe", json_string(name));
add_root_warnings_to_response(resp, root);
send_and_dispose_response(client, resp);
resp = build_subscription_results(sub, root);
if (resp) {
send_and_dispose_response(client, resp);
}
done:
w_root_delref(root);
}
bool w_start_listener(const char *path)
{
struct sockaddr_un un;
pthread_t thr;
pthread_attr_t attr;
pthread_mutexattr_t mattr;
struct sigaction sa;
sigset_t sigset;
#ifdef HAVE_LIBGIMLI_H
volatile struct gimli_heartbeat *hb = NULL;
#endif
struct timeval tv;
void *ignored;
int n_clients = 0;
listener_thread = pthread_self();
pthread_mutexattr_init(&mattr);
pthread_mutexattr_settype(&mattr, PTHREAD_MUTEX_RECURSIVE);
pthread_mutex_init(&w_client_lock, &mattr);
pthread_mutexattr_destroy(&mattr);
#ifdef HAVE_LIBGIMLI_H
hb = gimli_heartbeat_attach();
#endif
#if defined(HAVE_KQUEUE) || defined(HAVE_FSEVENTS)
{
struct rlimit limit;
int mib[2] = { CTL_KERN,
#ifdef KERN_MAXFILESPERPROC
KERN_MAXFILESPERPROC
#else
KERN_MAXFILES
#endif
};
int maxperproc;
size_t len;
len = sizeof(maxperproc);
sysctl(mib, 2, &maxperproc, &len, NULL, 0);
getrlimit(RLIMIT_NOFILE, &limit);
w_log(W_LOG_ERR, "file limit is %" PRIu64
" kern.maxfilesperproc=%i\n",
limit.rlim_cur, maxperproc);
if (limit.rlim_cur != RLIM_INFINITY &&
maxperproc > 0 &&
limit.rlim_cur < (rlim_t)maxperproc) {
limit.rlim_cur = maxperproc;
if (setrlimit(RLIMIT_NOFILE, &limit)) {
w_log(W_LOG_ERR,
"failed to raise limit to %" PRIu64 " (%s).\n",
limit.rlim_cur,
strerror(errno));
} else {
w_log(W_LOG_ERR,
"raised file limit to %" PRIu64 "\n",
limit.rlim_cur);
}
}
getrlimit(RLIMIT_NOFILE, &limit);
#ifndef HAVE_FSEVENTS
if (limit.rlim_cur < 10240) {
w_log(W_LOG_ERR,
"Your file descriptor limit is very low (%" PRIu64 "), "
"please consult the watchman docs on raising the limits\n",
limit.rlim_cur);
}
#endif
}
#endif
proc_pid = (int)getpid();
if (gettimeofday(&tv, NULL) == -1) {
w_log(W_LOG_ERR, "gettimeofday failed: %s\n", strerror(errno));
return false;
}
proc_start_time = (uint64_t)tv.tv_sec;
if (strlen(path) >= sizeof(un.sun_path) - 1) {
w_log(W_LOG_ERR, "%s: path is too long\n",
path);
return false;
}
signal(SIGPIPE, SIG_IGN);
/* allow SIGUSR1 and SIGCHLD to wake up a blocked thread, without restarting
* syscalls */
memset(&sa, 0, sizeof(sa));
sa.sa_handler = wakeme;
sa.sa_flags = 0;
sigaction(SIGUSR1, &sa, NULL);
sigaction(SIGCHLD, &sa, NULL);
// Block SIGCHLD everywhere
sigemptyset(&sigset);
sigaddset(&sigset, SIGCHLD);
sigprocmask(SIG_BLOCK, &sigset, NULL);
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
listener_fd = socket(PF_LOCAL, SOCK_STREAM, 0);
if (listener_fd == -1) {
w_log(W_LOG_ERR, "socket: %s\n",
strerror(errno));
return false;
}
un.sun_family = PF_LOCAL;
strcpy(un.sun_path, path);
unlink(path);
if (bind(listener_fd, (struct sockaddr*)&un, sizeof(un)) != 0) {
w_log(W_LOG_ERR, "bind(%s): %s\n",
path, strerror(errno));
close(listener_fd);
return false;
}
if (listen(listener_fd, 200) != 0) {
w_log(W_LOG_ERR, "listen(%s): %s\n",
path, strerror(errno));
close(listener_fd);
return false;
}
w_set_cloexec(listener_fd);
if (pthread_create(&reaper_thread, NULL, child_reaper, NULL)) {
w_log(W_LOG_FATAL, "pthread_create(reaper): %s\n",
strerror(errno));
return false;
}
if (!clients) {
clients = w_ht_new(2, &client_hash_funcs);
}
w_state_load();
#ifdef HAVE_LIBGIMLI_H
if (hb) {
gimli_heartbeat_set(hb, GIMLI_HB_RUNNING);
}
#endif
w_set_nonblock(listener_fd);
// Now run the dispatch
while (!stopping) {
int client_fd;
struct watchman_client *client;
struct pollfd pfd;
int bufsize;
#ifdef HAVE_LIBGIMLI_H
if (hb) {
gimli_heartbeat_set(hb, GIMLI_HB_RUNNING);
}
#endif
pfd.events = POLLIN;
pfd.fd = listener_fd;
if (poll(&pfd, 1, 10000) < 1 || (pfd.revents & POLLIN) == 0) {
continue;
}
#ifdef HAVE_ACCEPT4
client_fd = accept4(listener_fd, NULL, 0, SOCK_CLOEXEC);
#else
client_fd = accept(listener_fd, NULL, 0);
#endif
if (client_fd == -1) {
continue;
}
w_set_cloexec(client_fd);
bufsize = WATCHMAN_IO_BUF_SIZE;
setsockopt(client_fd, SOL_SOCKET, SO_SNDBUF, &bufsize, sizeof(bufsize));
client = calloc(1, sizeof(*client));
client->fd = client_fd;
w_log(W_LOG_DBG, "accepted client %p fd=%d\n", client, client_fd);
if (!w_json_buffer_init(&client->reader)) {
// FIXME: error handling
}
if (!w_json_buffer_init(&client->writer)) {
// FIXME: error handling
}
if (pipe(client->ping)) {
// FIXME: error handling
}
client->subscriptions = w_ht_new(2, &subscription_hash_funcs);
w_set_cloexec(client->ping[0]);
w_set_nonblock(client->ping[0]);
w_set_cloexec(client->ping[1]);
w_set_nonblock(client->ping[1]);
pthread_mutex_lock(&w_client_lock);
w_ht_set(clients, client->fd, w_ht_ptr_val(client));
pthread_mutex_unlock(&w_client_lock);
// Start a thread for the client.
// We used to use libevent for this, but we have
// a low volume of concurrent clients and the json
// parse/encode APIs are not easily used in a non-blocking
// server architecture.
if (pthread_create(&thr, &attr, client_thread, client)) {
// It didn't work out, sorry!
pthread_mutex_lock(&w_client_lock);
w_ht_del(clients, client->fd);
pthread_mutex_unlock(&w_client_lock);
}
}
pthread_attr_destroy(&attr);
/* close out some resources to persuade valgrind to run clean */
close(listener_fd);
listener_fd = -1;
// Wait for clients, waking any sleeping clients up in the process
do {
w_ht_iter_t iter;
pthread_mutex_lock(&w_client_lock);
n_clients = w_ht_size(clients);
if (w_ht_first(clients, &iter)) do {
struct watchman_client *client = w_ht_val_ptr(iter.value);
ignore_result(write(client->ping[1], "a", 1));
} while (w_ht_next(clients, &iter));
pthread_mutex_unlock(&w_client_lock);
w_log(W_LOG_ERR, "waiting for %d clients to terminate\n", n_clients);
usleep(2000);
} while (n_clients > 0);
w_root_free_watched_roots();
pthread_join(reaper_thread, &ignored);
cfg_shutdown();
return true;
}
static w_query_expr *name_parser(w_query *query,
json_t *term, bool caseless)
{
const char *pattern = NULL, *scope = "basename";
const char *which = caseless ? "iname" : "name";
struct name_data *data;
json_t *name;
w_ht_t *map = NULL;
if (!json_is_array(term)) {
ignore_result(asprintf(&query->errmsg, "Expected array for '%s' term",
which));
return NULL;
}
if (json_array_size(term) > 3) {
ignore_result(asprintf(&query->errmsg,
"Invalid number of arguments for '%s' term",
which));
return NULL;
}
if (json_array_size(term) == 3) {
json_t *jscope;
jscope = json_array_get(term, 2);
if (!json_is_string(jscope)) {
ignore_result(asprintf(&query->errmsg,
"Argument 3 to '%s' must be a string",
which));
return NULL;
}
scope = json_string_value(jscope);
if (strcmp(scope, "basename") && strcmp(scope, "wholename")) {
ignore_result(asprintf(&query->errmsg,
"Invalid scope '%s' for %s expression",
scope, which));
return NULL;
}
}
name = json_array_get(term, 1);
if (json_is_array(name)) {
uint32_t i;
for (i = 0; i < json_array_size(name); i++) {
if (!json_is_string(json_array_get(name, i))) {
ignore_result(asprintf(&query->errmsg,
"Argument 2 to '%s' must be either a string or an array of string",
which));
return NULL;
}
}
map = w_ht_new(json_array_size(name), &w_ht_string_funcs);
for (i = 0; i < json_array_size(name); i++) {
w_string_t *element;
const char *ele;
ele = json_string_value(json_array_get(name, i));
if (caseless) {
element = w_string_new_lower(ele);
} else {
element = w_string_new(ele);
}
w_ht_set(map, w_ht_ptr_val(element), 1);
w_string_delref(element);
}
} else if (json_is_string(name)) {
pattern = json_string_value(name);
} else {
ignore_result(asprintf(&query->errmsg,
"Argument 2 to '%s' must be either a string or an array of string",
which));
return NULL;
}
data = calloc(1, sizeof(*data));
if (pattern) {
data->name = w_string_new(pattern);
}
data->map = map;
data->caseless = caseless;
data->wholename = !strcmp(scope, "wholename");
return w_query_expr_new(eval_name, dispose_name, data);
}
