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main.cpp
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/* Copyright 2012-present Facebook, Inc.
* Licensed under the Apache License, Version 2.0 */
#include "watchman.h"
#include "Logging.h"
#ifndef _WIN32
#include <poll.h>
#endif
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 *sock_name = NULL;
char *log_name = NULL;
static char *pid_file = NULL;
char *watchman_state_file = NULL;
static char **daemon_argv = NULL;
const char *watchman_tmp_dir = NULL;
static int persistent = 0;
int dont_save_state = 0;
static int foreground = 0;
static int no_pretty = 0;
static int no_spawn = 0;
static int no_local = 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) {
#if !defined(USE_GIMLI) && !defined(_WIN32)
struct flock lock;
pid_t mypid;
int fd;
// 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");
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;
fd = open(pid_file, O_RDWR | O_CREAT, 0644);
if (fd == -1) {
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
w_set_cloexec(fd);
if (fcntl(fd, F_SETLK, &lock) != 0) {
char pidstr[32];
int len;
len = read(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, 0)) {
w_log(W_LOG_ERR, "Failed to truncate pidfile %s: %s\n",
pid_file, strerror(errno));
return false;
}
dprintf(fd, "%d", mypid);
fsync(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!
*/
return true;
#else
// ze-googles, they do nothing!!
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
w_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
#define MAX_DAEMON_ARGS 64
static void append_argv(char **argv, char *item)
{
int i;
for (i = 0; argv[i]; i++) {
;
}
if (i + 1 >= MAX_DAEMON_ARGS) {
abort();
}
argv[i] = item;
argv[i+1] = NULL;
}
#ifdef _WIN32
static void spawn_win32(void) {
char module_name[WATCHMAN_NAME_MAX];
GetModuleFileName(NULL, module_name, sizeof(module_name));
char *argv[MAX_DAEMON_ARGS] = {
module_name,
(char*)"--foreground",
NULL
};
posix_spawn_file_actions_t actions;
posix_spawnattr_t attr;
pid_t pid;
int i;
for (i = 0; daemon_argv[i]; i++) {
append_argv(argv, daemon_argv[i]);
}
posix_spawnattr_init(&attr);
posix_spawnattr_setflags(&attr, POSIX_SPAWN_SETPGROUP);
posix_spawn_file_actions_init(&actions);
posix_spawn_file_actions_addopen(&actions,
STDIN_FILENO, "/dev/null", O_RDONLY, 0);
posix_spawn_file_actions_addopen(&actions,
STDOUT_FILENO, log_name, O_WRONLY|O_CREAT|O_APPEND, 0600);
posix_spawn_file_actions_adddup2(&actions,
STDOUT_FILENO, STDERR_FILENO);
posix_spawnp(&pid, argv[0], &actions, &attr, argv, environ);
posix_spawnattr_destroy(&attr);
posix_spawn_file_actions_destroy(&actions);
}
#endif
#ifdef USE_GIMLI
static void spawn_via_gimli(void)
{
char *argv[MAX_DAEMON_ARGS] = {
GIMLI_MONITOR_PATH,
#ifdef WATCHMAN_STATE_DIR
(char*)"--trace-dir=" WATCHMAN_STATE_DIR "/traces",
#endif
(char*)"--pidfile", pid_file,
(char*)"watchman",
(char*)"--foreground",
NULL
};
posix_spawn_file_actions_t actions;
posix_spawnattr_t attr;
pid_t pid;
int i;
for (i = 0; daemon_argv[i]; i++) {
append_argv(argv, daemon_argv[i]);
}
close_random_fds();
posix_spawnattr_init(&attr);
posix_spawn_file_actions_init(&actions);
posix_spawn_file_actions_addopen(&actions,
STDOUT_FILENO, log_name, O_WRONLY|O_CREAT|O_APPEND, 0600);
posix_spawn_file_actions_adddup2(&actions,
STDOUT_FILENO, STDERR_FILENO);
posix_spawnp(&pid, argv[0], &actions, &attr, argv, environ);
posix_spawnattr_destroy(&attr);
posix_spawn_file_actions_destroy(&actions);
}
#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)
{
char *argv[MAX_DAEMON_ARGS] = {
(char*)spawner,
NULL
};
posix_spawn_file_actions_t actions;
posix_spawnattr_t attr;
pid_t pid;
int i;
int res, err;
for (i = 0; daemon_argv[i]; i++) {
append_argv(argv, daemon_argv[i]);
}
close_random_fds();
posix_spawnattr_init(&attr);
posix_spawn_file_actions_init(&actions);
posix_spawn_file_actions_addopen(&actions,
STDOUT_FILENO, log_name, O_WRONLY|O_CREAT|O_APPEND, 0600);
posix_spawn_file_actions_adddup2(&actions,
STDOUT_FILENO, STDERR_FILENO);
res = posix_spawnp(&pid, argv[0], &actions, &attr, argv, environ);
err = errno;
posix_spawnattr_destroy(&attr);
posix_spawn_file_actions_destroy(&actions);
if (res) {
w_log(W_LOG_FATAL, "Failed to spawn watchman via `%s': %s\n", spawner,
strerror(err));
}
if (waitpid(pid, &res, 0) == -1) {
w_log(W_LOG_FATAL, "Failed waiting for %s: %s\n", spawner, strerror(errno));
}
if (WIFEXITED(res) && WEXITSTATUS(res) == 0) {
return;
}
if (WIFEXITED(res)) {
w_log(W_LOG_FATAL, "%s: exited with status %d\n", spawner,
WEXITSTATUS(res));
} else if (WIFSIGNALED(res)) {
w_log(W_LOG_FATAL, "%s: signaled with %d\n", spawner, WTERMSIG(res));
}
w_log(W_LOG_ERR, "%s: failed to start, exit status %d\n", spawner, res);
}
#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;
char *argv[MAX_DAEMON_ARGS] = {
(char*)"/bin/launchctl",
(char*)"load",
(char*)"-F",
NULL
};
posix_spawnattr_t attr;
pid_t pid;
int res;
close_random_fds();
if (_NSGetExecutablePath(watchman_path, &size) == -1) {
w_log(W_LOG_ERR, "_NSGetExecutablePath: path too long; size %u\n", size);
abort();
}
uid = getuid();
pw = getpwuid(uid);
if (!pw) {
w_log(W_LOG_ERR, "getpwuid(%d) failed: %s. I don't know who you are\n",
uid, strerror(errno));
abort();
}
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
char *unload_argv[MAX_DAEMON_ARGS] = {
(char*)"/bin/launchctl",
(char*)"unload",
(char*)"-F",
NULL
};
append_argv(unload_argv, plist_path);
errno = posix_spawnattr_init(&attr);
if (errno != 0) {
w_log(W_LOG_FATAL, "posix_spawnattr_init: %s\n", strerror(errno));
}
res = posix_spawnp(&pid, unload_argv[0], NULL, &attr, unload_argv, environ);
if (res == 0) {
waitpid(pid, &res, 0);
}
posix_spawnattr_destroy(&attr);
// 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) {
w_log(W_LOG_ERR, "Failed to open %s for write: %s\n",
plist_path, strerror(errno));
abort();
}
compute_file_name(&pid_file, compute_user_name(), "pid", "pidfile");
fprintf(fp,
"<?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>%s</string>\n"
" <string>--foreground</string>\n"
" <string>--logfile=%s</string>\n"
" <string>--log-level=%d</string>\n"
" <string>--sockname=%s</string>\n"
" <string>--statefile=%s</string>\n"
" <string>--pidfile=%s</string>\n"
" </array>\n"
" <key>Sockets</key>\n"
" <dict>\n"
" <key>sock</key>\n" // coupled with get_listener_socket_from_launchd
" <dict>\n"
" <key>SockPathName</key>\n"
" <string>%s</string>\n"
" <key>SockPathMode</key>\n"
" <integer>%d</integer>\n"
" </dict>\n"
" </dict>\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[%s]]></string>\n"
" </dict>\n"
" <key>ProcessType</key>\n"
" <string>Interactive</string>\n"
" <key>Nice</key>\n"
" <integer>-5</integer>\n"
"</dict>\n"
"</plist>\n",
watchman_path, log_name, log_level, sock_name,
watchman_state_file, pid_file, sock_name, 0600,
getenv("PATH"));
fclose(fp);
// Don't rely on umask, ensure we have the correct perms
chmod(plist_path, 0644);
append_argv(argv, plist_path);
errno = posix_spawnattr_init(&attr);
if (errno != 0) {
w_log(W_LOG_FATAL, "posix_spawnattr_init: %s\n", strerror(errno));
}
res = posix_spawnp(&pid, argv[0], NULL, &attr, argv, environ);
if (res) {
w_log(W_LOG_FATAL, "Failed to spawn watchman via launchd: %s\n",
strerror(errno));
}
posix_spawnattr_destroy(&attr);
if (waitpid(pid, &res, 0) == -1) {
w_log(W_LOG_FATAL, "Failed waiting for launchctl load: %s\n",
strerror(errno));
}
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%c%s-state",
state_parent,
WATCHMAN_DIR_SEP,
user));
if (!state_dir) {
w_log(W_LOG_ERR, "out of memory computing %s\n", what);
exit(1);
}
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%c%s",
state_dir, WATCHMAN_DIR_SEP, suffix));
if (!str) {
w_log(W_LOG_ERR, "out of memory computing %s", what);
abort();
}
free(state_dir);
}
#ifndef _WIN32
if (str[0] != '/') {
w_log(W_LOG_ERR, "invalid %s: %s", what, str);
abort();
}
#endif
*strp = str;
}
#ifndef _WIN32
const struct group *w_get_group(const char *group_name) {
// This explicit errno statement is necessary to distinguish between the
// group not existing and an error.
errno = 0;
struct group *group = getgrnam(group_name);
if (!group) {
if (errno == 0) {
w_log(W_LOG_ERR, "group '%s' does not exist\n", group_name);
} else {
w_log(W_LOG_ERR, "getting gid for '%s' failed: %s\n", group_name,
strerror(errno));
}
return nullptr;
}
return group;
}
#endif // ndef _WIN32
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 {
w_log(W_LOG_FATAL, "GetUserName failed: %s. I don't know who you are\n",
win32_strerror(GetLastError()));
}
#else
uid_t uid = getuid();
struct passwd *pw;
pw = getpwuid(uid);
if (!pw) {
w_log(W_LOG_FATAL, "getpwuid(%d) failed: %s. I don't know who you are\n",
uid, strerror(errno));
}
user = pw->pw_name;
#endif
if (!user) {
w_log(W_LOG_ERR, "watchman requires that you set $USER in your env\n");
abort();
}
}
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) {
w_log(W_LOG_ERR, "%s: path is too long\n",
sock_name);
abort();
}
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
{ "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 },
// test-state-dir is for testing only and should not be used in production:
// instead, use the compile-time WATCHMAN_STATE_DIR option
{ "test-state-dir", 0, NULL, REQ_STRING, &test_state_dir, "DIR", NOT_DAEMON },
{ 0, 0, 0, OPT_NONE, 0, 0, 0 }
};
static void parse_cmdline(int *argcp, char ***argvp)
{
cfg_load_global_config_file();
w_getopt(opts, argcp, argvp, &daemon_argv);
if (show_help) {
usage(opts, stdout);
}
if (show_version) {
printf("%s\n", PACKAGE_VERSION);
exit(0);
}
watchman::getLog().setStdErrLoggingLevel(
static_cast<enum watchman::LogLevel>(log_level));
setup_sock_name();
parse_encoding(server_encoding, &server_pdu);
parse_encoding(output_encoding, &output_pdu);
if (!output_encoding) {
output_pdu = no_pretty ? is_json_compact : is_json_pretty;
}
}
static json_ref build_command(int argc, char** argv) {
int i;
// Read blob from stdin
if (json_input_arg) {
json_error_t err;
w_jbuffer_t buf;
memset(&err, 0, sizeof(err));
auto cmd = buf.decodeNext(w_stm_stdin(), &err);
if (buf.pdu_type == is_bser) {
// If they used bser for the input, select bser for output
// unless they explicitly requested something else
if (!server_encoding) {
server_pdu = is_bser;
}
if (!output_encoding) {
output_pdu = is_bser;
}
} else if (buf.pdu_type == is_bser_v2) {
// If they used bser v2 for the input, select bser v2 for output
// unless they explicitly requested something else
if (!server_encoding) {
server_pdu = is_bser_v2;
}
if (!output_encoding) {
output_pdu = is_bser_v2;
}
}
if (!cmd) {
fprintf(stderr, "failed to parse command from stdin: %s\n",
err.text);
exit(1);
}
return cmd;
}
// Special case: no arguments means that we just want
// to verify that the service is up, starting it if
// needed
if (argc == 0) {
return nullptr;
}
auto cmd = json_array();
for (i = 0; i < argc; i++) {
json_array_append_new(cmd, typed_string_to_json(argv[i], W_STRING_UNICODE));
}
return cmd;