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main.cpp
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/* Copyright 2012-present Facebook, Inc.
* Licensed under the Apache License, Version 2.0 */
#include "ChildProcess.h"
#include "Logging.h"
#include "ThreadPool.h"
#include "watchman.h"
#ifndef _WIN32
#include <poll.h>
#endif
#ifdef WATCHMAN_FACEBOOK_INTERNAL
#include <folly/ScopeGuard.h>
#include <folly/Singleton.h>
#endif
using watchman::ChildProcess;
using watchman::FileDescriptor;
using Options = ChildProcess::Options;
using namespace watchman;
static int show_help = 0;
static int show_version = 0;
static enum w_pdu_type server_pdu = is_bser;
static enum w_pdu_type output_pdu = is_json_pretty;
static uint32_t server_capabilities = 0;
static uint32_t output_capabilities = 0;
static char *server_encoding = NULL;
static char *output_encoding = NULL;
static char *test_state_dir = NULL;
static char *pid_file = NULL;
static char **daemon_argv = NULL;
static int persistent = 0;
static int foreground = 0;
static int no_pretty = 0;
static int no_spawn = 0;
static int no_local = 0;
static int no_site_spawner = 0;
#ifndef _WIN32
static int inetd_style = 0;
static struct sockaddr_un un;
#endif
static int json_input_arg = 0;
#ifdef __APPLE__
#include <mach-o/dyld.h>
#endif
static const char *compute_user_name(void);
static void compute_file_name(char **strp, const char *user, const char *suffix,
const char *what);
static bool lock_pidfile(void) {
// We defer computing this path until we're in the server context because
// eager evaluation can trigger integration test failures unless all clients
// are aware of both the pidfile and the sockpath being used in the tests.
compute_file_name(&pid_file, compute_user_name(), "pid", "pidfile");
#if !defined(USE_GIMLI) && !defined(_WIN32)
struct flock lock;
pid_t mypid;
mypid = getpid();
memset(&lock, 0, sizeof(lock));
lock.l_type = F_WRLCK;
lock.l_start = 0;
lock.l_whence = SEEK_SET;
lock.l_len = 0;
FileDescriptor fd(open(pid_file, O_RDWR | O_CREAT, 0644));
if (!fd) {
w_log(W_LOG_ERR, "Failed to open pidfile %s for write: %s\n", pid_file,
strerror(errno));
return false;
}
// Ensure that no children inherit the locked pidfile descriptor
fd.setCloExec();
if (fcntl(fd.fd(), F_SETLK, &lock) != 0) {
char pidstr[32];
int len;
len = read(fd.fd(), pidstr, sizeof(pidstr) - 1);
pidstr[len] = '\0';
w_log(W_LOG_ERR, "Failed to lock pidfile %s: process %s owns it: %s\n",
pid_file, pidstr, strerror(errno));
return false;
}
// Replace contents of the pidfile with our pid string
if (ftruncate(fd.fd(), 0)) {
w_log(W_LOG_ERR, "Failed to truncate pidfile %s: %s\n",
pid_file, strerror(errno));
return false;
}
auto pidString = watchman::to<std::string>(mypid);
ignore_result(write(fd.fd(), pidString.data(), pidString.size()));
fsync(fd.fd());
/* We are intentionally not closing the fd and intentionally not storing
* a reference to it anywhere: the intention is that it remain locked
* for the rest of the lifetime of our process.
* close(fd); // NOPE!
*/
fd.release();
return true;
#else
// One does not simply, and without risk of races, write a pidfile
// on win32. Instead we're using a named mutex in the global namespace.
// This gives us a very simple way to exclusively claim ownership of
// the lock for this user. To make things a little more complicated,
// since we scope our locks based on the state dir location and require
// this to work for our integration tests, we need to create a unique
// name per state dir. This is made even more interesting because
// we are forbidden from using windows directory separator characters
// in the name, so we cannot simply concatenate the state dir path
// with a watchman specific prefix. Instead we iterate the path
// and rewrite any backslashes with forward slashes and use that
// for the name.
// Using a mutex for this does make it more awkward to discover
// the process id of the exclusive owner, but that's not critically
// important; it is possible to connect to the instance and issue
// a get-pid command if that is needed.
// We use the global namespace so that we ensure that we have one
// watchman process per user per state dir location. If we didn't
// use the Global namespace we'd end using a local namespace scoped
// to the user session and that might cause confusion/insanity if
// they are doing something elaborate like being logged in via
// ssh in multiple sessions and expecting to share state.
std::string name("Global\\Watchman-");
const auto* it = pid_file;
while (*it != 0) {
if (*it == '\\') {
// We're not allowed to use backslash in the name, so normalize
// to forward slashes.
name.append("/");
} else {
name.append(it, 1);
}
++it;
}
auto mutex = CreateMutexA(nullptr, true, name.c_str());
if (!mutex) {
watchman::log(
watchman::ERR,
"Failed to create mutex named: ",
name,
": ",
GetLastError(),
"\n");
return false;
}
if (GetLastError() == ERROR_ALREADY_EXISTS) {
watchman::log(
watchman::ERR,
"Failed to acquire mutex named: ",
name,
"; watchman is already running for this context\n");
return false;
}
/* We are intentionally not closing the mutex and intentionally not storing
* a reference to it anywhere: the intention is that it remain locked
* for the rest of the lifetime of our process.
* CloseHandle(mutex); // NOPE!
*/
return true;
#endif
}
static void run_service(void)
{
int fd;
bool res;
#ifndef _WIN32
// Before we redirect stdin/stdout to the log files, move any inetd-provided
// socket to a different descriptor number.
if (inetd_style) {
w_listener_prep_inetd();
}
#endif
// redirect std{in,out,err}
fd = open("/dev/null", O_RDONLY);
if (fd != -1) {
ignore_result(::dup2(fd, STDIN_FILENO));
::close(fd);
}
fd = open(log_name, O_WRONLY|O_APPEND|O_CREAT, 0600);
if (fd != -1) {
ignore_result(::dup2(fd, STDOUT_FILENO));
ignore_result(::dup2(fd, STDERR_FILENO));
::close(fd);
}
if (!lock_pidfile()) {
return;
}
#ifndef _WIN32
/* we are the child, let's set things up */
ignore_result(chdir("/"));
#endif
w_set_thread_name("listener");
{
char hostname[256];
gethostname(hostname, sizeof(hostname));
hostname[sizeof(hostname) - 1] = '\0';
w_log(W_LOG_ERR, "Watchman %s %s starting up on %s\n",
PACKAGE_VERSION,
#ifdef WATCHMAN_BUILD_INFO
WATCHMAN_BUILD_INFO,
#else
"<no build info set>",
#endif
hostname);
}
#ifndef _WIN32
// Block SIGCHLD by default; we only want it to be delivered
// to the reaper thread and only when it is ready to reap.
// This MUST happen before we spawn any threads so that they
// can pick up our default blocked signal mask.
{
sigset_t sigset;
sigemptyset(&sigset);
sigaddset(&sigset, SIGCHLD);
sigprocmask(SIG_BLOCK, &sigset, NULL);
}
#endif
watchman::getThreadPool().start(
cfg_get_int("thread_pool_worker_threads", 16),
cfg_get_int("thread_pool_max_items", 1024 * 1024));
ClockSpec::init();
w_state_load();
res = w_start_listener(sock_name);
w_root_free_watched_roots();
cfg_shutdown();
watchman::log(watchman::ERR, "Exiting from service with res=", res, "\n");
if (res) {
exit(0);
}
exit(1);
}
#ifndef _WIN32
// close any random descriptors that we may have inherited,
// leaving only the main stdio descriptors open, if we execute a
// child process.
static void close_random_fds(void) {
struct rlimit limit;
long open_max = 0;
int max_fd;
// Deduce the upper bound for number of descriptors
limit.rlim_cur = 0;
#ifdef RLIMIT_NOFILE
if (getrlimit(RLIMIT_NOFILE, &limit) != 0) {
limit.rlim_cur = 0;
}
#elif defined(RLIM_OFILE)
if (getrlimit(RLIMIT_OFILE, &limit) != 0) {
limit.rlim_cur = 0;
}
#endif
#ifdef _SC_OPEN_MAX
open_max = sysconf(_SC_OPEN_MAX);
#endif
if (open_max <= 0) {
open_max = 36; /* POSIX_OPEN_MAX (20) + some padding */
}
if (limit.rlim_cur == RLIM_INFINITY || limit.rlim_cur > INT_MAX) {
// "no limit", which seems unlikely
limit.rlim_cur = INT_MAX;
}
// Take the larger of the two values we compute
if (limit.rlim_cur > (rlim_t)open_max) {
open_max = limit.rlim_cur;
}
for (max_fd = open_max; max_fd > STDERR_FILENO; --max_fd) {
close(max_fd);
}
}
#endif
#if !defined(USE_GIMLI) && !defined(_WIN32)
static void daemonize(void)
{
close_random_fds();
// the double-fork-and-setsid trick establishes a
// child process that runs in its own process group
// with its own session and that won't get killed
// off when your shell exits (for example).
if (fork()) {
// The parent of the first fork is the client
// process that is being run by the user, and
// we want to allow that to continue.
return;
}
setsid();
if (fork()) {
// The parent of the second fork has served its
// purpose, so we simply exit here, otherwise
// we'll duplicate the effort of either the
// client or the server depending on if we
// return or not.
_exit(0);
}
// we are the child, let's set things up
run_service();
}
#endif
#ifdef _WIN32
static void spawn_win32(void) {
char module_name[WATCHMAN_NAME_MAX];
GetModuleFileName(NULL, module_name, sizeof(module_name));
Options opts;
opts.setFlags(POSIX_SPAWN_SETPGROUP);
opts.open(STDIN_FILENO, "/dev/null", O_RDONLY, 0666);
opts.open(STDOUT_FILENO, log_name, O_WRONLY | O_CREAT | O_APPEND, 0600);
opts.dup2(STDOUT_FILENO, STDERR_FILENO);
std::vector<w_string_piece> args{module_name, "--foreground"};
for (size_t i = 0; daemon_argv[i]; i++) {
args.push_back(daemon_argv[i]);
}
ChildProcess proc(args, std::move(opts));
proc.disown();
}
#endif
#ifdef USE_GIMLI
static void spawn_via_gimli(void)
{
std::vector<w_string_piece> args{
GIMLI_MONITOR_PATH,
#ifdef WATCHMAN_STATE_DIR
"--trace-dir=" WATCHMAN_STATE_DIR "/traces",
#endif
"--pidfile",
pid_file,
"watchman",
"--foreground",
};
for (size_t i = 0; daemon_argv[i]; i++) {
args.push_back(daemon_argv[i]);
}
close_random_fds();
Options opts;
opts.open(STDIN_FILENO, "/dev/null", O_RDONLY, 0666);
opts.open(STDOUT_FILENO, log_name, O_WRONLY | O_CREAT | O_APPEND, 0600);
opts.dup2(STDOUT_FILENO, STDERR_FILENO);
ChildProcess proc(args, std::move(opts));
proc.disown();
}
#endif
#ifndef _WIN32
// Spawn watchman via a site-specific spawn helper program.
// We'll pass along any daemon-appropriate arguments that
// we noticed during argument parsing.
static void spawn_site_specific(const char *spawner)
{
std::vector<w_string_piece> args{
spawner,
};
for (size_t i = 0; daemon_argv[i]; i++) {
args.push_back(daemon_argv[i]);
}
close_random_fds();
// Note that we're not setting up the output to go to the log files
// here. This is intentional; we'd like any failures in the spawner
// to bubble up to the user as having things silently fail and get
// logged to the server log doesn't provide any obvious cues to the
// user about what went wrong. Watchman will open and redirect output
// to its log files when it ultimately is launched and enters the
// run_service() function above.
// However, we do need to make sure that any output from both stdout
// and stderr goes to stderr of the end user.
Options opts;
opts.open(STDIN_FILENO, "/dev/null", O_RDONLY, 0666);
opts.dup2(STDERR_FILENO, STDOUT_FILENO);
opts.dup2(STDERR_FILENO, STDERR_FILENO);
try {
ChildProcess proc(args, std::move(opts));
auto res = proc.wait();
if (WIFEXITED(res) && WEXITSTATUS(res) == 0) {
return;
}
if (WIFEXITED(res)) {
log(FATAL, spawner, ": exited with status ", WEXITSTATUS(res), "\n");
} else if (WIFSIGNALED(res)) {
log(FATAL, spawner, ": signaled with ", WTERMSIG(res), "\n");
}
log(FATAL, spawner, ": failed to start, exit status ", res, "\n");
} catch (const std::exception& exc) {
log(FATAL,
"Failed to spawn watchman via `",
spawner,
"': ",
exc.what(),
"\n");
}
}
#endif
#ifdef __APPLE__
static void spawn_via_launchd(void)
{
char watchman_path[WATCHMAN_NAME_MAX];
uint32_t size = sizeof(watchman_path);
char plist_path[WATCHMAN_NAME_MAX];
FILE *fp;
struct passwd *pw;
uid_t uid;
close_random_fds();
if (_NSGetExecutablePath(watchman_path, &size) == -1) {
log(FATAL, "_NSGetExecutablePath: path too long; size ", size, "\n");
}
uid = getuid();
pw = getpwuid(uid);
if (!pw) {
log(FATAL,
"getpwuid(",
uid,
") failed: ",
strerror(errno),
". I don't know who you are\n");
}
snprintf(plist_path, sizeof(plist_path),
"%s/Library/LaunchAgents", pw->pw_dir);
// Best effort attempt to ensure that the agents dir exists. We'll detect
// and report the failure in the fopen call below.
mkdir(plist_path, 0755);
snprintf(plist_path, sizeof(plist_path),
"%s/Library/LaunchAgents/com.github.facebook.watchman.plist", pw->pw_dir);
if (access(plist_path, R_OK) == 0) {
// Unload any that may already exist, as it is likely wrong
ChildProcess unload_proc(
{"/bin/launchctl", "unload", "-F", plist_path}, Options());
unload_proc.wait();
// Forcibly remove the plist. In some cases it may have some attributes
// set that prevent launchd from loading it. This can happen where
// the system was re-imaged or restored from a backup
unlink(plist_path);
}
fp = fopen(plist_path, "w");
if (!fp) {
log(FATAL,
"Failed to open ",
plist_path,
" for write: ",
strerror(errno),
"\n");
}
compute_file_name(&pid_file, compute_user_name(), "pid", "pidfile");
auto plist_content = watchman::to<std::string>(
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
"<!DOCTYPE plist PUBLIC \"-//Apple//DTD PLIST 1.0//EN\" "
"\"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n"
"<plist version=\"1.0\">\n"
"<dict>\n"
" <key>Label</key>\n"
" <string>com.github.facebook.watchman</string>\n"
" <key>Disabled</key>\n"
" <false/>\n"
" <key>ProgramArguments</key>\n"
" <array>\n"
" <string>",
watchman_path,
"</string>\n"
" <string>--foreground</string>\n"
" <string>--logfile=",
log_name,
"</string>\n"
" <string>--log-level=",
log_level,
"</string>\n"
" <string>--sockname=",
sock_name,
"</string>\n"
" <string>--statefile=",
watchman_state_file,
"</string>\n"
" <string>--pidfile=",
pid_file,
"</string>\n"
" </array>\n"
" <key>KeepAlive</key>\n"
" <dict>\n"
" <key>Crashed</key>\n"
" <true/>\n"
" </dict>\n"
" <key>RunAtLoad</key>\n"
" <true/>\n"
" <key>EnvironmentVariables</key>\n"
" <dict>\n"
" <key>PATH</key>\n"
" <string><![CDATA[",
getenv("PATH"),
"]]></string>\n"
" </dict>\n"
" <key>ProcessType</key>\n"
" <string>Interactive</string>\n"
" <key>Nice</key>\n"
" <integer>-5</integer>\n"
"</dict>\n"
"</plist>\n");
fwrite(plist_content.data(), 1, plist_content.size(), fp);
fclose(fp);
// Don't rely on umask, ensure we have the correct perms
chmod(plist_path, 0644);
ChildProcess load_proc(
{"/bin/launchctl", "load", "-F", plist_path}, Options());
auto res = load_proc.wait();
if (WIFEXITED(res) && WEXITSTATUS(res) == 0) {
return;
}
// Most likely cause is "headless" operation with no GUI context
if (WIFEXITED(res)) {
w_log(W_LOG_ERR, "launchctl: exited with status %d\n", WEXITSTATUS(res));
} else if (WIFSIGNALED(res)) {
w_log(W_LOG_ERR, "launchctl: signaled with %d\n", WTERMSIG(res));
}
w_log(W_LOG_ERR, "Falling back to daemonize\n");
daemonize();
}
#endif
static void parse_encoding(const char *enc, enum w_pdu_type *pdu)
{
if (!enc) {
return;
}
if (!strcmp(enc, "json")) {
*pdu = is_json_compact;
return;
}
if (!strcmp(enc, "bser")) {
*pdu = is_bser;
return;
}
if (!strcmp(enc, "bser-v2")) {
*pdu = is_bser_v2;
return;
}
w_log(W_LOG_ERR, "Invalid encoding '%s', use one of json, bser or bser-v2\n",
enc);
exit(EX_USAGE);
}
static const char *get_env_with_fallback(const char *name1,
const char *name2, const char *fallback)
{
const char *val;
val = getenv(name1);
if (!val || *val == 0) {
val = getenv(name2);
}
if (!val || *val == 0) {
val = fallback;
}
return val;
}
static void compute_file_name(char **strp,
const char *user,
const char *suffix,
const char *what)
{
char *str = NULL;
str = *strp;
if (!str) {
/* We'll put our various artifacts in a user specific dir
* within the state dir location */
char *state_dir = NULL;
const char *state_parent = test_state_dir ? test_state_dir :
#ifdef WATCHMAN_STATE_DIR
WATCHMAN_STATE_DIR
#else
watchman_tmp_dir
#endif
;
ignore_result(asprintf(&state_dir, "%s/%s-state", state_parent, user));
if (!state_dir) {
log(FATAL, "out of memory computing ", what, "\n");
}
if (mkdir(state_dir, 0700) == 0 || errno == EEXIST) {
#ifndef _WIN32
// verify ownership
struct stat st;
int dir_fd;
int ret = 0;
uid_t euid = geteuid();
// TODO: also allow a gid to be specified here
const char* sock_group_name = cfg_get_string("sock_group", nullptr);
// S_ISGID is set so that files inside this directory inherit the group
// name
mode_t dir_perms =
cfg_get_perms(
"sock_access", false /* write bits */, true /* execute bits */) |
S_ISGID;
auto dirp =
w_dir_open(state_dir, false /* don't need strict symlink rules */);
dir_fd = dirp->getFd();
if (dir_fd == -1) {
w_log(W_LOG_ERR, "dirfd(%s): %s\n", state_dir, strerror(errno));
goto bail;
}
if (fstat(dir_fd, &st) != 0) {
w_log(W_LOG_ERR, "fstat(%s): %s\n", state_dir, strerror(errno));
ret = 1;
goto bail;
}
if (euid != st.st_uid) {
w_log(W_LOG_ERR,
"the owner of %s is uid %d and doesn't match your euid %d\n",
state_dir, st.st_uid, euid);
ret = 1;
goto bail;
}
if (st.st_mode & 0022) {
w_log(W_LOG_ERR,
"the permissions on %s allow others to write to it. "
"Verify that you own the contents and then fix its "
"permissions by running `chmod 0700 %s`\n",
state_dir,
state_dir);
ret = 1;
goto bail;
}
if (sock_group_name) {
const struct group *sock_group = w_get_group(sock_group_name);
if (!sock_group) {
ret = 1;
goto bail;
}
if (fchown(dir_fd, -1, sock_group->gr_gid) == -1) {
w_log(W_LOG_ERR, "setting up group '%s' failed: %s\n",
sock_group_name, strerror(errno));
ret = 1;
goto bail;
}
}
// Depending on group and world accessibility, change permissions on the
// directory. We can't leave the directory open and set permissions on the
// socket because not all POSIX systems respect permissions on UNIX domain
// sockets, but all POSIX systems respect permissions on the containing
// directory.
w_log(W_LOG_DBG, "Setting permissions on state dir to 0%o\n", dir_perms);
if (fchmod(dir_fd, dir_perms) == -1) {
w_log(W_LOG_ERR, "fchmod(%s, %#o): %s\n", state_dir, dir_perms,
strerror(errno));
ret = 1;
goto bail;
}
bail:
if (ret) {
exit(ret);
}
#endif
} else {
w_log(W_LOG_ERR, "while computing %s: failed to create %s: %s\n", what,
state_dir, strerror(errno));
exit(1);
}
ignore_result(asprintf(&str, "%s/%s", state_dir, suffix));
if (!str) {
log(FATAL, "out of memory computing ", what, "\n");
}
free(state_dir);
}
#ifndef _WIN32
if (str[0] != '/') {
log(FATAL, "invalid ", what, ": ", str, "\n");
}
#endif
*strp = str;
}
static const char *compute_user_name(void) {
const char *user = get_env_with_fallback("USER", "LOGNAME", NULL);
#ifdef _WIN32
static char user_buf[256];
#endif
if (!user) {
#ifdef _WIN32
DWORD size = sizeof(user_buf);
if (GetUserName(user_buf, &size)) {
user_buf[size] = 0;
user = user_buf;
} else {
log(FATAL,
"GetUserName failed: ",
win32_strerror(GetLastError()),
". I don't know who you are\n");
}
#else
uid_t uid = getuid();
struct passwd *pw;
pw = getpwuid(uid);
if (!pw) {
log(FATAL,
"getpwuid(",
uid,
") failed: ",
strerror(errno),
". I don't know who you are\n");
}
user = pw->pw_name;
#endif
if (!user) {
log(FATAL, "watchman requires that you set $USER in your env\n");
}
}
return user;
}
static void setup_sock_name(void)
{
const char *user = compute_user_name();
watchman_tmp_dir = get_env_with_fallback("TMPDIR", "TMP", "/tmp");
#ifdef _WIN32
if (!sock_name) {
asprintf(&sock_name, "\\\\.\\pipe\\watchman-%s", user);
}
#else
compute_file_name(&sock_name, user, "sock", "sockname");
#endif
compute_file_name(&watchman_state_file, user, "state", "statefile");
compute_file_name(&log_name, user, "log", "logname");
#ifdef USE_GIMLI
compute_file_name(&pid_file, user, "pid", "pidfile");
#endif
#ifndef _WIN32
if (strlen(sock_name) >= sizeof(un.sun_path) - 1) {
log(FATAL, sock_name, ": path is too long\n");
}
un.sun_family = PF_LOCAL;
memcpy(un.sun_path, sock_name, strlen(sock_name) + 1);
#endif
}
static bool should_start(int err)
{
if (err == ECONNREFUSED) {
return true;
}
if (err == ENOENT) {
return true;
}
return false;
}
static bool try_command(json_t *cmd, int timeout)
{
w_jbuffer_t buffer;
w_jbuffer_t output_pdu_buffer;
int err;
auto client = w_stm_connect(sock_name, timeout * 1000);
if (!client) {
return false;
}
if (!cmd) {
return true;
}
// Send command
if (!buffer.pduEncodeToStream(
server_pdu, server_capabilities, cmd, client.get())) {
err = errno;
w_log(W_LOG_ERR, "error sending PDU to server\n");
errno = err;
return false;
}
buffer.clear();
do {
if (!buffer.passThru(
output_pdu,
output_capabilities,
&output_pdu_buffer,
client.get())) {
return false;
}
} while (persistent);
return true;
}
static struct watchman_getopt opts[] = {
{"help", 'h', "Show this help", OPT_NONE, &show_help, NULL, NOT_DAEMON},
#ifndef _WIN32
{"inetd",
0,
"Spawning from an inetd style supervisor",
OPT_NONE,
&inetd_style,
NULL,
IS_DAEMON},
#endif
{"no-site-spawner",
'S',
"Don't use the site or system spawner",
OPT_NONE,
&no_site_spawner,
NULL,
IS_DAEMON},
{"version",
'v',
"Show version number",
OPT_NONE,
&show_version,
NULL,
NOT_DAEMON},
{"sockname",
'U',
"Specify alternate sockname",
REQ_STRING,
&sock_name,
"PATH",
IS_DAEMON},
{"logfile",
'o',
"Specify path to logfile",
REQ_STRING,
&log_name,
"PATH",
IS_DAEMON},
{"log-level",
0,
"set the log level (0 = off, default is 1, verbose = 2)",
REQ_INT,
&log_level,
NULL,
IS_DAEMON},
#ifdef USE_GIMLI
{"pidfile",
0,
"Specify path to gimli monitor pidfile",
REQ_STRING,
&pid_file,
"PATH",
NOT_DAEMON},
#else
{"pidfile",
0,
"Specify path to pidfile",
REQ_STRING,
&pid_file,
"PATH",
IS_DAEMON},
#endif
{"persistent",
'p',
"Persist and wait for further responses",
OPT_NONE,
&persistent,
NULL,
NOT_DAEMON},
{"no-save-state",
'n',
"Don't save state between invocations",
OPT_NONE,
&dont_save_state,
NULL,
IS_DAEMON},
{"statefile",
0,
"Specify path to file to hold watch and trigger state",
REQ_STRING,
&watchman_state_file,
"PATH",
IS_DAEMON},
{"json-command",
'j',
"Instead of parsing CLI arguments, take a single "
"json object from stdin",
OPT_NONE,
&json_input_arg,
NULL,
NOT_DAEMON},
{"output-encoding",
0,
"CLI output encoding. json (default) or bser",
REQ_STRING,
&output_encoding,
NULL,
NOT_DAEMON},
{"server-encoding",
0,
"CLI<->server encoding. bser (default) or json",
REQ_STRING,
&server_encoding,
NULL,
NOT_DAEMON},
{"foreground",
'f',
"Run the service in the foreground",
OPT_NONE,
&foreground,
NULL,
NOT_DAEMON},
{"no-pretty",
0,
"Don't pretty print JSON",
OPT_NONE,
&no_pretty,
NULL,
NOT_DAEMON},
{"no-spawn",
0,
"Don't try to start the service if it is not available",
OPT_NONE,
&no_spawn,
NULL,
NOT_DAEMON},
{"no-local",
0,
"When no-spawn is enabled, don't try to handle request"
" in client mode if service is unavailable",
OPT_NONE,
&no_local,
NULL,
NOT_DAEMON},