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- #include <cstdio>
- #include <cstddef>
- #include <cstring>
- #include <string>
- #include <iostream>
- #include <fstream>
- #include <system_error>
- #include <memory>
- #include <algorithm>
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <sys/wait.h>
- #include <sys/socket.h>
- #include <sys/un.h>
- #include <unistd.h>
- #include <signal.h>
- #include <pwd.h>
- #include "control-cmds.h"
- #include "service-constants.h"
- #include "cpbuffer.h"
- #include "dinit-client.h"
- #include "load-service.h"
- #include "dinit-util.h"
- #include "mconfig.h"
- // dinitctl: utility to control the Dinit daemon, including starting and stopping of services.
- // This utility communicates with the dinit daemon via a unix stream socket (as specified in
- // SYSCONTROLSOCKET, or $HOME/.dinitctl).
- static constexpr uint16_t min_cp_version = 1;
- static constexpr uint16_t max_cp_version = 1;
- enum class command_t;
- static int issue_load_service(int socknum, const char *service_name, bool find_only = false);
- static int check_load_reply(int socknum, cpbuffer_t &, handle_t *handle_p, service_state_t *state_p,
- bool write_error=true);
- static int start_stop_service(int socknum, cpbuffer_t &, const char *service_name, command_t command,
- bool do_pin, bool do_force, bool wait_for_service, bool ignore_unstarted, bool verbose);
- static int unpin_service(int socknum, cpbuffer_t &, const char *service_name, bool verbose);
- static int unload_service(int socknum, cpbuffer_t &, const char *service_name, bool verbose);
- static int reload_service(int socknum, cpbuffer_t &, const char *service_name, bool verbose);
- static int list_services(int socknum, cpbuffer_t &);
- static int service_status(int socknum, cpbuffer_t &rbuffer, const char *service_name);
- static int shutdown_dinit(int soclknum, cpbuffer_t &, bool verbose);
- static int add_remove_dependency(int socknum, cpbuffer_t &rbuffer, bool add, const char *service_from,
- const char *service_to, dependency_type dep_type, bool verbose);
- static int enable_disable_service(int socknum, cpbuffer_t &rbuffer, const char *from, const char *to,
- bool enable, bool verbose);
- static int do_setenv(int socknum, cpbuffer_t &rbuffer, std::vector<const char *> &env_names);
- static const char * describeState(bool stopped)
- {
- return stopped ? "stopped" : "started";
- }
- static const char * describeVerb(bool stop)
- {
- return stop ? "stop" : "start";
- }
- enum class command_t {
- NONE,
- START_SERVICE,
- WAKE_SERVICE,
- STOP_SERVICE,
- RESTART_SERVICE,
- RELEASE_SERVICE,
- UNPIN_SERVICE,
- UNLOAD_SERVICE,
- RELOAD_SERVICE,
- LIST_SERVICES,
- SERVICE_STATUS,
- SHUTDOWN,
- ADD_DEPENDENCY,
- RM_DEPENDENCY,
- ENABLE_SERVICE,
- DISABLE_SERVICE,
- SETENV,
- };
- class dinit_protocol_error
- {
- // no body
- };
- // Entry point.
- int dinitctl_main(int argc, char **argv)
- {
- using namespace std;
-
- bool show_help = argc < 2;
- const char *service_name = nullptr;
- const char *to_service_name = nullptr;
- dependency_type dep_type;
- bool dep_type_set = false;
-
- std::string control_socket_str;
- const char * control_socket_path = nullptr;
-
- bool verbose = true;
- bool user_dinit = (getuid() != 0); // communicate with user daemon
- bool wait_for_service = true;
- bool do_pin = false;
- bool do_force = false;
- bool ignore_unstarted = false;
-
- command_t command = command_t::NONE;
- std::vector<const char *> cmd_args;
-
- for (int i = 1; i < argc; i++) {
- if (argv[i][0] == '-') {
- if (strcmp(argv[i], "--help") == 0) {
- show_help = true;
- break;
- }
- else if (strcmp(argv[i], "--version") == 0) {
- cout << "Dinit version " << DINIT_VERSION << ".\n";
- return 0;
- }
- else if (strcmp(argv[i], "--no-wait") == 0) {
- wait_for_service = false;
- }
- else if (strcmp(argv[i], "--ignore-unstarted") == 0) {
- ignore_unstarted = true;
- }
- else if (strcmp(argv[i], "--quiet") == 0) {
- verbose = false;
- }
- else if (strcmp(argv[i], "--system") == 0 || strcmp(argv[i], "-s") == 0) {
- user_dinit = false;
- }
- else if (strcmp(argv[i], "--user") == 0 || strcmp(argv[i], "-u") == 0) {
- user_dinit = true;
- }
- else if (strcmp(argv[i], "--pin") == 0) {
- do_pin = true;
- }
- else if (strcmp(argv[i], "--socket-path") == 0 || strcmp(argv[i], "-p") == 0) {
- ++i;
- if (i == argc) {
- cerr << "dinitctl: --socket-path/-p should be followed by socket path" << std::endl;
- return 1;
- }
- control_socket_str = argv[i];
- }
- else if ((command == command_t::ENABLE_SERVICE || command == command_t::DISABLE_SERVICE)
- && strcmp(argv[i], "--from") == 0) {
- ++i;
- if (i == argc) {
- cerr << "dinitctl: --from should be followed by a service name" << std::endl;
- return 1;
- }
- service_name = argv[i];
- }
- else if ((command == command_t::STOP_SERVICE || command == command_t::RESTART_SERVICE)
- && (strcmp(argv[i], "--force") == 0 || strcmp(argv[i], "-f") == 0)) {
- do_force = true;
- }
- else {
- cerr << "dinitctl: unrecognized/invalid option: " << argv[i] << " (use --help for help)\n";
- return 1;
- }
- }
- else if (command == command_t::NONE) {
- if (strcmp(argv[i], "start") == 0) {
- command = command_t::START_SERVICE;
- }
- else if (strcmp(argv[i], "wake") == 0) {
- command = command_t::WAKE_SERVICE;
- }
- else if (strcmp(argv[i], "stop") == 0) {
- command = command_t::STOP_SERVICE;
- }
- else if (strcmp(argv[i], "restart") == 0) {
- command = command_t::RESTART_SERVICE;
- }
- else if (strcmp(argv[i], "release") == 0) {
- command = command_t::RELEASE_SERVICE;
- }
- else if (strcmp(argv[i], "unpin") == 0) {
- command = command_t::UNPIN_SERVICE;
- }
- else if (strcmp(argv[i], "unload") == 0) {
- command = command_t::UNLOAD_SERVICE;
- }
- else if (strcmp(argv[i], "reload") == 0) {
- command = command_t::RELOAD_SERVICE;
- }
- else if (strcmp(argv[i], "list") == 0) {
- command = command_t::LIST_SERVICES;
- }
- else if (strcmp(argv[i], "status") == 0) {
- command = command_t::SERVICE_STATUS;
- }
- else if (strcmp(argv[i], "shutdown") == 0) {
- command = command_t::SHUTDOWN;
- }
- else if (strcmp(argv[i], "add-dep") == 0) {
- command = command_t::ADD_DEPENDENCY;
- }
- else if (strcmp(argv[i], "rm-dep") == 0) {
- command = command_t::RM_DEPENDENCY;
- }
- else if (strcmp(argv[i], "enable") == 0) {
- command = command_t::ENABLE_SERVICE;
- }
- else if (strcmp(argv[i], "disable") == 0) {
- command = command_t::DISABLE_SERVICE;
- }
- else if (strcmp(argv[i], "setenv") == 0) {
- command = command_t::SETENV;
- }
- else {
- cerr << "dinitctl: unrecognized command: " << argv[i] << " (use --help for help)\n";
- return 1;
- }
- }
- else {
- // service name / other non-option
- if (command == command_t::ADD_DEPENDENCY || command == command_t::RM_DEPENDENCY) {
- if (! dep_type_set) {
- if (strcmp(argv[i], "regular") == 0) {
- dep_type = dependency_type::REGULAR;
- }
- else if (strcmp(argv[i], "milestone") == 0) {
- dep_type = dependency_type::MILESTONE;
- }
- else if (strcmp(argv[i], "waits-for") == 0) {
- dep_type = dependency_type::WAITS_FOR;
- }
- else {
- show_help = true;
- break;
- }
- dep_type_set = true;
- }
- else if (service_name == nullptr) {
- service_name = argv[i];
- }
- else if (to_service_name == nullptr) {
- to_service_name = argv[i];
- }
- else {
- show_help = true;
- break;
- }
- }
- else if (command == command_t::ENABLE_SERVICE || command == command_t::DISABLE_SERVICE) {
- if (to_service_name != nullptr) {
- show_help = true;
- break;
- }
- to_service_name = argv[i];
- }
- else {
- cmd_args.push_back(argv[i]);
- }
- }
- }
-
- // Additional argument checks for various commands:
- if (command == command_t::NONE) {
- show_help = true;
- }
- else if (command == command_t::ENABLE_SERVICE || command == command_t::DISABLE_SERVICE) {
- show_help |= (to_service_name == nullptr);
- }
- else if (command == command_t::SETENV) {
- // Handle SETENV specially, since it needs arguments but they are not service names
- if (cmd_args.empty()) {
- show_help = true;
- }
- }
- else {
- bool no_service_cmd = (command == command_t::LIST_SERVICES || command == command_t::SHUTDOWN);
- if (no_service_cmd) {
- if (!cmd_args.empty()) {
- show_help = true;
- }
- }
- else {
- if (command == command_t::ADD_DEPENDENCY || command == command_t::RM_DEPENDENCY) {
- if (! dep_type_set || service_name == nullptr || to_service_name == nullptr) {
- show_help = true;
- }
- }
- else if (cmd_args.empty()) {
- show_help = true;
- }
- else {
- // No command can currently accept more than one service argument:
- if (cmd_args.size() > 1) {
- show_help = true;
- }
- service_name = cmd_args.front();
- }
- }
- }
- if (show_help) {
- cout << "dinitctl: control Dinit services\n"
- "\n"
- "Usage:\n"
- " dinitctl [options] status <service-name>\n"
- " dinitctl [options] start [options] <service-name>\n"
- " dinitctl [options] stop [options] <service-name>\n"
- " dinitctl [options] restart [options] <service-name>\n"
- " dinitctl [options] wake [options] <service-name>\n"
- " dinitctl [options] release [options] <service-name>\n"
- " dinitctl [options] unpin <service-name>\n"
- " dinitctl [options] unload <service-name>\n"
- " dinitctl [options] reload <service-name>\n"
- " dinitctl [options] list\n"
- " dinitctl [options] shutdown\n"
- " dinitctl [options] add-dep <type> <from-service> <to-service>\n"
- " dinitctl [options] rm-dep <type> <from-service> <to-service>\n"
- " dinitctl [options] enable [--from <from-service>] <to-service>\n"
- " dinitctl [options] disable [--from <from-service>] <to-service>\n"
- " dinitctl [options] setenv [name[=value] ...]\n"
- "\n"
- "Note: An activated service continues running when its dependents stop.\n"
- "\n"
- "General options:\n"
- " --help : show this help\n"
- " -s, --system : control system daemon (default if run as root)\n"
- " -u, --user : control user daemon\n"
- " --quiet : suppress output (except errors)\n"
- " --socket-path <path>, -p <path>\n"
- " : specify socket for communication with daemon\n"
- "\n"
- "Command options:\n"
- " --no-wait : don't wait for service startup/shutdown to complete\n"
- " --pin : pin the service in the requested state\n"
- " --force : force stop even if dependents will be affected\n";
- return 1;
- }
-
- // Begin the real work: connect to dinit
- signal(SIGPIPE, SIG_IGN);
-
- // Locate control socket
- if (! control_socket_str.empty()) {
- control_socket_path = control_socket_str.c_str();
- }
- else {
- control_socket_path = get_default_socket_path(control_socket_str, user_dinit);
- if (control_socket_path == nullptr) {
- cerr << "dinitctl: cannot locate user home directory (set XDG_RUNTIME_DIR, HOME, check /etc/passwd file, or "
- "specify socket path via -p)" << endl;
- return 1;
- }
- }
-
- try {
- int socknum = connect_to_daemon(control_socket_path);
- // Start by querying protocol version:
- cpbuffer_t rbuffer;
- check_protocol_version(min_cp_version, max_cp_version, rbuffer, socknum);
- if (command == command_t::UNPIN_SERVICE) {
- return unpin_service(socknum, rbuffer, service_name, verbose);
- }
- else if (command == command_t::UNLOAD_SERVICE) {
- return unload_service(socknum, rbuffer, service_name, verbose);
- }
- else if (command == command_t::RELOAD_SERVICE) {
- return reload_service(socknum, rbuffer, service_name, verbose);
- }
- else if (command == command_t::LIST_SERVICES) {
- return list_services(socknum, rbuffer);
- }
- else if (command == command_t::SERVICE_STATUS) {
- return service_status(socknum, rbuffer, service_name);
- }
- else if (command == command_t::SHUTDOWN) {
- return shutdown_dinit(socknum, rbuffer, verbose);
- }
- else if (command == command_t::ADD_DEPENDENCY || command == command_t::RM_DEPENDENCY) {
- return add_remove_dependency(socknum, rbuffer, command == command_t::ADD_DEPENDENCY,
- service_name, to_service_name, dep_type, verbose);
- }
- else if (command == command_t::ENABLE_SERVICE || command == command_t::DISABLE_SERVICE) {
- // If only one service specified, assume that we enable for 'boot' service:
- if (service_name == nullptr) {
- service_name = "boot";
- }
- return enable_disable_service(socknum, rbuffer, service_name, to_service_name,
- command == command_t::ENABLE_SERVICE, verbose);
- }
- else if (command == command_t::SETENV) {
- return do_setenv(socknum, rbuffer, cmd_args);
- }
- else {
- return start_stop_service(socknum, rbuffer, service_name, command, do_pin, do_force,
- wait_for_service, ignore_unstarted, verbose);
- }
- }
- catch (cp_old_client_exception &e) {
- std::cerr << "dinitctl: too old (server reports newer protocol version)" << std::endl;
- }
- catch (cp_old_server_exception &e) {
- std::cerr << "dinitctl: server too old or protocol error" << std::endl;
- }
- catch (cp_read_exception &e) {
- cerr << "dinitctl: control socket read failure or protocol error" << endl;
- }
- catch (cp_write_exception &e) {
- cerr << "dinitctl: control socket write error: " << std::strerror(e.errcode) << endl;
- }
- catch (dinit_protocol_error &e) {
- cerr << "dinitctl: protocol error" << endl;
- }
- catch (general_error &ge) {
- std::cerr << "dinit-client";
- if (ge.get_action() != nullptr) {
- std::cerr << ": " << ge.get_action();
- std::string &arg = ge.get_arg();
- if (!arg.empty()) {
- std::cerr << " " << arg;
- }
- }
- if (ge.get_err() != 0) {
- std::cerr << ": " << strerror(ge.get_err());
- }
- std::cerr << '\n';
- }
- return 1;
- }
- int main(int argc, char **argv)
- {
- try {
- return dinitctl_main(argc, argv);
- }
- catch (std::bad_alloc &e) {
- std::cerr << "dinitctl: out of memory\n";
- }
- return 1;
- }
- // Extract/read a string of specified length from the buffer/socket. The string is consumed
- // from the buffer.
- static std::string read_string(int socknum, cpbuffer_t &rbuffer, uint32_t length)
- {
- int rb_len = rbuffer.get_length();
- if (uint32_t(rb_len) >= length) {
- std::string r = rbuffer.extract_string(0, length);
- rbuffer.consume(length);
- return r;
- }
- std::string r = rbuffer.extract_string(0, rb_len);
- uint32_t rlen = length - rb_len;
- uint32_t clen;
- do {
- rbuffer.reset();
- fill_some(rbuffer, socknum);
- char *bptr = rbuffer.get_ptr(0);
- clen = rbuffer.get_length();
- clen = std::min(clen, rlen);
- r.append(bptr, clen);
- rlen -= clen;
- } while (rlen > 0);
- rbuffer.consume(clen);
- return r;
- }
- // Load a service: issue load command, wait for reply. Return true on success, display error message
- // and return false on failure.
- // socknum - the socket fd to communicate via
- // rbuffer - the buffer for communication
- // name - the name of the service to load
- // handle - where to store the handle of the loaded service
- // state - where to store the state of the loaded service (may be null).
- // write_error - whether to write an error message if the service can't be loaded
- static bool load_service(int socknum, cpbuffer_t &rbuffer, const char *name, handle_t *handle,
- service_state_t *state, bool write_error=true)
- {
- // Load 'to' service:
- if (issue_load_service(socknum, name)) {
- return false;
- }
- wait_for_reply(rbuffer, socknum);
- if (check_load_reply(socknum, rbuffer, handle, state, write_error) != 0) {
- return false;
- }
- return true;
- }
- // Get the service name for a given handle, by querying the daemon.
- static std::string get_service_name(int socknum, cpbuffer_t &rbuffer, handle_t handle)
- {
- auto m = membuf()
- .append((char) DINIT_CP_QUERYSERVICENAME)
- .append((char) 0)
- .append(handle);
- write_all_x(socknum, m);
- wait_for_reply(rbuffer, socknum);
- if (rbuffer[0] != DINIT_RP_SERVICENAME) {
- throw cp_read_exception{0};
- }
- // 1 byte reserved
- // uint16_t size
- fill_buffer_to(rbuffer, socknum, 2 + sizeof(uint16_t));
- uint16_t namesize;
- rbuffer.extract(&namesize, 2, sizeof(uint16_t));
- rbuffer.consume(2 + sizeof(uint16_t));
- std::string name;
- do {
- if (rbuffer.get_length() == 0) {
- fill_some(rbuffer, socknum);
- }
- size_t to_extract = std::min(size_t(rbuffer.get_length()), namesize - name.length());
- size_t contiguous_len = rbuffer.get_contiguous_length(rbuffer.get_ptr(0));
- if (contiguous_len <= to_extract) {
- name.append(rbuffer.get_ptr(0), contiguous_len);
- rbuffer.consume(contiguous_len);
- name.append(rbuffer.get_ptr(0), to_extract - contiguous_len);
- rbuffer.consume(to_extract - contiguous_len);
- }
- else {
- name.append(rbuffer.get_ptr(0), to_extract);
- rbuffer.consume(to_extract);
- break;
- }
- } while (name.length() < namesize);
- return name;
- }
- // Start/stop a service
- static int start_stop_service(int socknum, cpbuffer_t &rbuffer, const char *service_name,
- command_t command, bool do_pin, bool do_force, bool wait_for_service, bool ignore_unstarted,
- bool verbose)
- {
- using namespace std;
- bool do_stop = (command == command_t::STOP_SERVICE || command == command_t::RELEASE_SERVICE);
- service_state_t state;
- handle_t handle;
-
- if (command != command_t::RESTART_SERVICE && command != command_t::STOP_SERVICE
- && command != command_t::RELEASE_SERVICE) {
- ignore_unstarted = false;
- }
- if (! load_service(socknum, rbuffer, service_name, &handle, &state, !ignore_unstarted)) {
- return ignore_unstarted ? 0 : 1;
- }
- service_state_t wanted_state = do_stop ? service_state_t::STOPPED : service_state_t::STARTED;
- int pcommand = 0;
- switch (command) {
- case command_t::STOP_SERVICE:
- case command_t::RESTART_SERVICE: // stop, and then start
- pcommand = DINIT_CP_STOPSERVICE;
- break;
- case command_t::RELEASE_SERVICE:
- pcommand = DINIT_CP_RELEASESERVICE;
- break;
- case command_t::START_SERVICE:
- pcommand = DINIT_CP_STARTSERVICE;
- break;
- case command_t::WAKE_SERVICE:
- pcommand = DINIT_CP_WAKESERVICE;
- break;
- default: ;
- }
- // Need to issue STOPSERVICE/STARTSERVICE
- // We'll do this regardless of the current service state / target state, since issuing
- // start/stop also sets or clears the "explicitly started" flag on the service.
- {
- char flags = (do_pin ? 1 : 0) | ((pcommand == DINIT_CP_STOPSERVICE && !do_force) ? 2 : 0);
- if (command == command_t::RESTART_SERVICE) {
- flags |= 4;
- }
- auto m = membuf()
- .append((char) pcommand)
- .append(flags)
- .append(handle);
- write_all_x(socknum, m);
- wait_for_reply(rbuffer, socknum);
- auto reply_pkt_h = rbuffer[0];
- rbuffer.consume(1); // consume header
- if (reply_pkt_h == DINIT_RP_ALREADYSS) {
- bool already = (state == wanted_state);
- if (verbose) {
- cout << "Service " << (already ? "(already) " : "")
- << describeState(do_stop) << "." << endl;
- }
- return 0; // success!
- }
- if (reply_pkt_h == DINIT_RP_PINNEDSTARTED) {
- cerr << "dinitctl: cannot stop service '" << service_name << "' as it is pinned started\n";
- return 1;
- }
- if (reply_pkt_h == DINIT_RP_PINNEDSTOPPED) {
- cerr << "dinitctl: cannot start service '" << service_name << "' as it is pinned stopped\n";
- return 1;
- }
- if (reply_pkt_h == DINIT_RP_DEPENDENTS && pcommand == DINIT_CP_STOPSERVICE) {
- cerr << "dinitctl: cannot stop service '" << service_name << "' due to the following dependents:\n";
- if (command != command_t::RESTART_SERVICE) {
- cerr << "(only direct dependents are listed. Exercise caution before using '--force' !!)\n";
- }
- // size_t number, N * handle_t handles
- size_t number;
- rbuffer.fill_to(socknum, sizeof(number));
- rbuffer.extract(&number, 0, sizeof(number));
- rbuffer.consume(sizeof(number));
- std::vector<handle_t> handles;
- handles.reserve(number);
- for (size_t i = 0; i < number; i++) {
- handle_t handle;
- rbuffer.fill_to(socknum, sizeof(handle_t));
- rbuffer.extract(&handle, 0, sizeof(handle));
- handles.push_back(handle);
- rbuffer.consume(sizeof(handle));
- }
- // Print the directly affected dependents:
- cerr << " ";
- for (handle_t handle : handles) {
- cerr << " " << get_service_name(socknum, rbuffer, handle);
- }
- cerr << "\n";
- return 1;
- }
- if (reply_pkt_h == DINIT_RP_NAK && command == command_t::RESTART_SERVICE) {
- if (ignore_unstarted) {
- if (verbose) {
- cout << "Service '" << service_name << "' is not currently started.\n";
- }
- return 0;
- }
- cerr << "dinitctl: cannot restart service; service not started.\n";
- return 1;
- }
- if (reply_pkt_h == DINIT_RP_NAK && command == command_t::WAKE_SERVICE) {
- cerr << "dinitctl: service has no active dependents, cannot wake.\n";
- return 1;
- }
- if (reply_pkt_h == DINIT_RP_SHUTTINGDOWN) {
- cerr << "dinitctl: cannot start/restart/wake service, shutdown is in progress.\n";
- return 1;
- }
- if (reply_pkt_h != DINIT_RP_ACK && reply_pkt_h != DINIT_RP_ALREADYSS) {
- cerr << "dinitctl: protocol error." << endl;
- return 1;
- }
- }
- if (! wait_for_service) {
- if (verbose) {
- cout << "Issued " << describeVerb(do_stop) << " command successfully for service '"
- << service_name << "'." << endl;
- }
- return 0;
- }
- service_event_t completionEvent;
- service_event_t cancelledEvent;
- if (do_stop) {
- completionEvent = service_event_t::STOPPED;
- cancelledEvent = service_event_t::STOPCANCELLED;
- }
- else {
- completionEvent = service_event_t::STARTED;
- cancelledEvent = service_event_t::STARTCANCELLED;
- }
- // Wait until service started:
- int r = rbuffer.fill_to(socknum, 2);
- while (r > 0) {
- if (rbuffer[0] >= 100) {
- int pktlen = (unsigned char) rbuffer[1];
- fill_buffer_to(rbuffer, socknum, pktlen);
- if (rbuffer[0] == DINIT_IP_SERVICEEVENT) {
- handle_t ev_handle;
- rbuffer.extract((char *) &ev_handle, 2, sizeof(ev_handle));
- service_event_t event = static_cast<service_event_t>(rbuffer[2 + sizeof(ev_handle)]);
- if (ev_handle == handle) {
- if (event == completionEvent) {
- if (verbose) {
- cout << "Service '" << service_name << "' " << describeState(do_stop) << "." << endl;
- }
- return 0;
- }
- else if (event == cancelledEvent) {
- if (verbose) {
- cout << "Service '" << service_name << "' " << describeVerb(do_stop) << " cancelled." << endl;
- }
- return 1;
- }
- else if (! do_stop && event == service_event_t::FAILEDSTART) {
- if (verbose) {
- cout << "Service '" << service_name << "' failed to start." << endl;
- }
- return 1;
- }
- }
- }
- rbuffer.consume(pktlen);
- r = rbuffer.fill_to(socknum, 2);
- }
- else {
- // Not an information packet?
- cerr << "dinitctl: protocol error" << endl;
- return 1;
- }
- }
- if (r == -1) {
- perror("dinitctl: read");
- }
- else {
- cerr << "protocol error (connection closed by server)" << endl;
- }
- return 1;
- }
- // Issue a "load service" command (DINIT_CP_LOADSERVICE), without waiting for
- // a response. Returns 1 on failure (with error logged), 0 on success.
- static int issue_load_service(int socknum, const char *service_name, bool find_only)
- {
- // Build buffer;
- uint16_t sname_len = strlen(service_name);
- int bufsize = 3 + sname_len;
-
- std::unique_ptr<char[]> ubuf(new char[bufsize]);
- auto buf = ubuf.get();
- buf[0] = find_only ? DINIT_CP_FINDSERVICE : DINIT_CP_LOADSERVICE;
- memcpy(buf + 1, &sname_len, 2);
- memcpy(buf + 3, service_name, sname_len);
- write_all_x(socknum, buf, bufsize);
-
- return 0;
- }
- // Check that a "load service" reply was received, and that the requested service was found.
- // state_p may be null.
- static int check_load_reply(int socknum, cpbuffer_t &rbuffer, handle_t *handle_p, service_state_t *state_p, bool write_error)
- {
- using namespace std;
-
- if (rbuffer[0] == DINIT_RP_SERVICERECORD) {
- fill_buffer_to(rbuffer, socknum, 2 + sizeof(*handle_p));
- rbuffer.extract((char *) handle_p, 2, sizeof(*handle_p));
- if (state_p) *state_p = static_cast<service_state_t>(rbuffer[1]);
- //target_state = static_cast<service_state_t>(rbuffer[2 + sizeof(handle)]);
- rbuffer.consume(3 + sizeof(*handle_p));
- return 0;
- }
- else if (rbuffer[0] == DINIT_RP_NOSERVICE) {
- if (write_error) {
- cerr << "dinitctl: failed to find/load service." << endl;
- }
- return 1;
- }
- else {
- throw dinit_protocol_error();
- }
- }
- static int unpin_service(int socknum, cpbuffer_t &rbuffer, const char *service_name, bool verbose)
- {
- using namespace std;
- handle_t handle;
-
- // Build buffer;
- if (! load_service(socknum, rbuffer, service_name, &handle, nullptr)) {
- return 1;
- }
-
- // Issue UNPIN command.
- {
- auto m = membuf()
- .append<char>(DINIT_CP_UNPINSERVICE)
- .append(handle);
- write_all_x(socknum, m);
-
- wait_for_reply(rbuffer, socknum);
- if (rbuffer[0] != DINIT_RP_ACK) {
- cerr << "dinitctl: protocol error." << endl;
- return 1;
- }
- rbuffer.consume(1);
- }
- if (verbose) {
- cout << "Service '" << service_name << "' unpinned." << endl;
- }
- return 0;
- }
- static int unload_service(int socknum, cpbuffer_t &rbuffer, const char *service_name, bool verbose)
- {
- using namespace std;
- if (issue_load_service(socknum, service_name, true) == 1) {
- return 1;
- }
- wait_for_reply(rbuffer, socknum);
- handle_t handle;
- if (rbuffer[0] == DINIT_RP_NOSERVICE) {
- cerr << "dinitctl: service not loaded." << endl;
- return 1;
- }
- if (check_load_reply(socknum, rbuffer, &handle, nullptr) != 0) {
- return 1;
- }
- // Issue UNLOAD command.
- {
- auto m = membuf()
- .append<char>(DINIT_CP_UNLOADSERVICE)
- .append(handle);
- write_all_x(socknum, m);
- wait_for_reply(rbuffer, socknum);
- if (rbuffer[0] == DINIT_RP_NAK) {
- cerr << "dinitctl: could not unload service; service not stopped, or is a dependency of "
- "other service." << endl;
- return 1;
- }
- if (rbuffer[0] != DINIT_RP_ACK) {
- cerr << "dinitctl: protocol error." << endl;
- return 1;
- }
- rbuffer.consume(1);
- }
- if (verbose) {
- cout << "Service '" << service_name << "' unloaded." << endl;
- }
- return 0;
- }
- static int reload_service(int socknum, cpbuffer_t &rbuffer, const char *service_name, bool verbose)
- {
- using namespace std;
- if (issue_load_service(socknum, service_name, true) == 1) {
- return 1;
- }
- wait_for_reply(rbuffer, socknum);
- handle_t handle;
- if (rbuffer[0] == DINIT_RP_NOSERVICE) {
- cerr << "dinitctl: service not loaded." << endl;
- return 1;
- }
- if (check_load_reply(socknum, rbuffer, &handle, nullptr) != 0) {
- return 1;
- }
- // Issue RELOAD command.
- {
- auto m = membuf()
- .append<char>(DINIT_CP_RELOADSERVICE)
- .append(handle);
- write_all_x(socknum, m);
- wait_for_reply(rbuffer, socknum);
- if (rbuffer[0] == DINIT_RP_NAK) {
- cerr << "dinitctl: could not reload service; service in wrong state, incompatible change, "
- "or bad service description." << endl;
- return 1;
- }
- if (rbuffer[0] != DINIT_RP_ACK) {
- cerr << "dinitctl: protocol error." << endl;
- return 1;
- }
- rbuffer.consume(1);
- }
- if (verbose) {
- cout << "Service '" << service_name << "' reloaded." << endl;
- }
- return 0;
- }
- static int list_services(int socknum, cpbuffer_t &rbuffer)
- {
- using namespace std;
-
- char cmdbuf[] = { (char)DINIT_CP_LISTSERVICES };
- write_all_x(socknum, cmdbuf, 1);
- wait_for_reply(rbuffer, socknum);
- while (rbuffer[0] == DINIT_RP_SVCINFO) {
- int hdrsize = 8 + std::max(sizeof(int), sizeof(pid_t));
- fill_buffer_to(rbuffer, socknum, hdrsize);
- int nameLen = rbuffer[1];
- service_state_t current = static_cast<service_state_t>(rbuffer[2]);
- service_state_t target = static_cast<service_state_t>(rbuffer[3]);
- int console_flags = rbuffer[4];
- bool has_console = (console_flags & 2) != 0;
- bool waiting_console = (console_flags & 1) != 0;
- bool was_skipped = (console_flags & 4) != 0;
- bool marked_active = (console_flags & 8) != 0;
- stopped_reason_t stop_reason = static_cast<stopped_reason_t>(rbuffer[5]);
- pid_t service_pid;
- int exit_status;
- if (current != service_state_t::STOPPED) {
- rbuffer.extract((char *)&service_pid, 8, sizeof(service_pid));
- }
- else {
- rbuffer.extract((char *)&exit_status, 8, sizeof(exit_status));
- }
- fill_buffer_to(rbuffer, socknum, nameLen + hdrsize);
- char *name_ptr = rbuffer.get_ptr(hdrsize);
- int clength = std::min(rbuffer.get_contiguous_length(name_ptr), nameLen);
- string name = string(name_ptr, clength);
- name.append(rbuffer.get_buf_base(), nameLen - clength);
- cout << "[";
- // [ ] if marked active; otherwise, { } if target state is STARTED
- // + if started, 's' if skipped, space otherwise
- char lbracket = target == service_state_t::STARTED ? '{' : ' ';
- char rbracket = target == service_state_t::STARTED ? '}' : ' ';
- cout << (marked_active ? '[' : lbracket);
- if (current == service_state_t::STARTED) {
- cout << (was_skipped ? 's' : '+');
- }
- else {
- cout << ' ';
- }
- cout << (marked_active ? ']' : rbracket);
-
- if (current == service_state_t::STARTING) {
- cout << "<<";
- }
- else if (current == service_state_t::STOPPING) {
- cout << ">>";
- }
- else {
- cout << " ";
- }
-
- cout << (target == service_state_t::STOPPED ? '{' : ' ');
- if (current == service_state_t::STOPPED) {
- bool did_fail = false;
- if (stop_reason == stopped_reason_t::TERMINATED) {
- if (!WIFEXITED(exit_status) || WEXITSTATUS(exit_status) != 0) {
- did_fail = true;
- }
- }
- else did_fail = (stop_reason != stopped_reason_t::NORMAL);
- cout << (did_fail ? 'X' : '-');
- }
- else {
- cout << ' ';
- }
- cout << (target == service_state_t::STOPPED ? '}' : ' ');
- cout << "] " << name;
- if (current != service_state_t::STOPPED && service_pid != -1) {
- cout << " (pid: " << service_pid << ")";
- }
-
- if (current == service_state_t::STOPPED && stop_reason == stopped_reason_t::TERMINATED) {
- if (WIFEXITED(exit_status)) {
- cout << " (exit status: " << WEXITSTATUS(exit_status) << ")";
- }
- else if (WIFSIGNALED(exit_status)) {
- cout << " (signal: " << WTERMSIG(exit_status) << ")";
- }
- }
- if (has_console) {
- cout << " (has console)";
- }
- else if (waiting_console) {
- cout << " (waiting for console)";
- }
- cout << endl;
- rbuffer.consume(hdrsize + nameLen);
- wait_for_reply(rbuffer, socknum);
- }
- if (rbuffer[0] != DINIT_RP_LISTDONE) {
- cerr << "dinitctl: control socket protocol error" << endl;
- return 1;
- }
- return 0;
- }
- static void print_termination_details(int exit_status)
- {
- using namespace std;
- if (WIFSIGNALED(exit_status)) {
- cout << "signalled - signal ";
- cout << WTERMSIG(exit_status);
- }
- else if (WIFEXITED(exit_status)) {
- cout << "exited - status ";
- cout << WEXITSTATUS(exit_status);
- }
- else {
- cout << "unknown";
- }
- }
- static int service_status(int socknum, cpbuffer_t &rbuffer, const char *service_name)
- {
- using namespace std;
- if (issue_load_service(socknum, service_name, true) == 1) {
- return 1;
- }
- wait_for_reply(rbuffer, socknum);
- handle_t handle;
- if (rbuffer[0] == DINIT_RP_NOSERVICE) {
- cerr << "dinitctl: service not loaded." << endl;
- return 1;
- }
- if (check_load_reply(socknum, rbuffer, &handle, nullptr) != 0) {
- return 1;
- }
- // Issue STATUS request
- {
- auto m = membuf()
- .append<char>(DINIT_CP_SERVICESTATUS)
- .append(handle);
- write_all_x(socknum, m);
- wait_for_reply(rbuffer, socknum);
- if (rbuffer[0] != DINIT_RP_SERVICESTATUS) {
- cerr << "dinitctl: protocol error." << endl;
- return 1;
- }
- rbuffer.consume(1);
- int statussize = 6 + std::max(sizeof(pid_t), sizeof(int));;
- fill_buffer_to(rbuffer, socknum, statussize + 1 /* reserved */);
- rbuffer.consume(1);
- service_state_t current = static_cast<service_state_t>(rbuffer[0]);
- service_state_t target = static_cast<service_state_t>(rbuffer[1]);
- int console_flags = rbuffer[2];
- bool has_console = (console_flags & 2) != 0;
- bool waiting_console = (console_flags & 1) != 0;
- bool was_skipped = (console_flags & 4) != 0;
- bool marked_active = (console_flags & 8) != 0;
- stopped_reason_t stop_reason = static_cast<stopped_reason_t>(rbuffer[3]);
- pid_t service_pid = -1;
- int exit_status = 0;
- if (current != service_state_t::STOPPED) {
- rbuffer.extract((char *)&service_pid, 6, sizeof(service_pid));
- }
- else {
- rbuffer.extract((char *)&exit_status, 6, sizeof(exit_status));
- }
- cout << "Service: " << service_name << "\n"
- " State: ";
- switch (current) {
- case service_state_t::STOPPED:
- cout << "STOPPED";
- switch (stop_reason) {
- case stopped_reason_t::DEPFAILED:
- cout << " (dependency failed/terminated)";
- break;
- case stopped_reason_t::FAILED:
- cout << " (failed to start";
- if (exit_status != 0) {
- cout << "; ";
- print_termination_details(exit_status);
- }
- cout << ")";
- break;
- case stopped_reason_t::EXECFAILED:
- uint16_t launch_stage;
- rbuffer.extract((char *)&launch_stage, 4, 2);
- cout << " (could not be launched)\n";
- cout << " Stage: " << exec_stage_descriptions[launch_stage] << "\n";
- cout << " Error: " << strerror(exit_status);
- break;
- case stopped_reason_t::TERMINATED:
- cout << " (terminated";
- if (exit_status != 0) {
- cout << "; ";
- print_termination_details(exit_status);
- }
- cout << ")";
- break;
- case stopped_reason_t::TIMEDOUT:
- cout << " (start timed out)";
- break;
- case stopped_reason_t::NORMAL:
- break;
- }
- break;
- case service_state_t::STARTING:
- cout << "STARTING";
- if (target == service_state_t::STOPPED) {
- cout << " (target state: STOPPED)";
- }
- break;
- case service_state_t::STARTED:
- cout << "STARTED";
- if (was_skipped) {
- cout << " (startup skipped)";
- }
- break;
- case service_state_t::STOPPING:
- cout << "STOPPING";
- if (target == service_state_t::STARTED) {
- cout << " (target state: STARTED)";
- }
- if (exit_status != 0) {
- cout << "(terminated ;";
- print_termination_details(exit_status);
- cout << ")";
- }
- }
- if (has_console) {
- cout << " (holding console)";
- }
- if (waiting_console) {
- cout << " (waiting for console)";
- }
- cout << "\n";
- if (target == service_state_t::STARTED) {
- cout << " Activation: ";
- if (marked_active) {
- cout << "explicitly started\n";
- }
- else {
- cout << "start due to dependent(s)\n";
- }
- }
- if (service_pid != -1) {
- cout << " Process ID: " << service_pid << "\n";
- }
- }
- return 0;
- }
- static int add_remove_dependency(int socknum, cpbuffer_t &rbuffer, bool add,
- const char *service_from, const char *service_to, dependency_type dep_type, bool verbose)
- {
- using namespace std;
- handle_t from_handle;
- handle_t to_handle;
- if (! load_service(socknum, rbuffer, service_from, &from_handle, nullptr)
- || ! load_service(socknum, rbuffer, service_to, &to_handle, nullptr)) {
- return 1;
- }
- if (from_handle == to_handle) {
- cerr << "dinitctl: can not add/remove a dependency from a service to itself" << endl;
- return 1;
- }
- auto m = membuf()
- .append<char>(add ? (char)DINIT_CP_ADD_DEP : (char)DINIT_CP_REM_DEP)
- .append(static_cast<char>(dep_type))
- .append(from_handle)
- .append(to_handle);
- write_all_x(socknum, m);
- wait_for_reply(rbuffer, socknum);
- // check reply
- if (rbuffer[0] == DINIT_RP_NAK) {
- cerr << "dinitctl: could not add dependency: circular dependency or wrong state" << endl;
- return 1;
- }
- if (rbuffer[0] != DINIT_RP_ACK) {
- cerr << "dinitctl: control socket protocol error" << endl;
- return 1;
- }
- if (verbose) {
- std::cout << "Service '" << service_from << "': dependency '" << service_to << "' " << (add ? "added" : "removed") << endl;
- }
- return 0;
- }
- static int shutdown_dinit(int socknum, cpbuffer_t &rbuffer, bool verbose)
- {
- // TODO support no-wait option.
- using namespace std;
- auto m = membuf()
- .append<char>(DINIT_CP_SHUTDOWN)
- .append(static_cast<char>(shutdown_type_t::HALT));
- write_all_x(socknum, m);
- wait_for_reply(rbuffer, socknum);
- if (rbuffer[0] != DINIT_RP_ACK) {
- cerr << "dinitctl: control socket protocol error" << endl;
- return 1;
- }
- if (verbose) {
- std::cout << "Shutting down dinit..." << std::endl;
- }
- // Now wait for rollback complete, by waiting for the connection to close:
- try {
- while (true) {
- wait_for_info(rbuffer, socknum);
- rbuffer.consume(rbuffer[1]);
- }
- }
- catch (cp_read_exception &exc) {
- // Assume that the connection closed.
- }
- if (verbose) {
- std::cout << "Connection closed." << std::endl;
- }
- return 0;
- }
- // exception for cancelling a service operation
- class service_op_cancel { };
- static int enable_disable_service(int socknum, cpbuffer_t &rbuffer, const char *from, const char *to,
- bool enable, bool verbose)
- {
- using namespace std;
- service_state_t from_state = service_state_t::STARTED;
- handle_t from_handle;
- handle_t to_handle;
- if (! load_service(socknum, rbuffer, from, &from_handle, &from_state)
- || ! load_service(socknum, rbuffer, to, &to_handle, nullptr)) {
- return 1;
- }
- // Get service load path
- char buf[1] = { DINIT_CP_QUERY_LOAD_MECH };
- write_all_x(socknum, buf, 1);
- wait_for_reply(rbuffer, socknum);
- if (rbuffer[0] != DINIT_RP_LOADER_MECH) {
- cerr << "dinitctl: control socket protocol error" << endl;
- return 1;
- }
- // Packet type, load mechanism type, packet size:
- fill_buffer_to(rbuffer, socknum, 2 + sizeof(uint32_t));
- if (rbuffer[1] != SSET_TYPE_DIRLOAD) {
- cerr << "dinitctl: unknown configuration, unable to load service descriptions" << endl;
- return 1;
- }
- vector<string> paths;
- uint32_t pktsize;
- rbuffer.extract(&pktsize, 2, sizeof(uint32_t));
- fill_buffer_to(rbuffer, socknum, 2 + sizeof(uint32_t) * 3); // path entries, cwd length
- uint32_t path_entries; // number of service directories
- rbuffer.extract(&path_entries, 2 + sizeof(uint32_t), sizeof(uint32_t));
- uint32_t cwd_len;
- rbuffer.extract(&cwd_len, 2 + sizeof(uint32_t) * 2, sizeof(uint32_t));
- rbuffer.consume(2 + sizeof(uint32_t) * 3);
- pktsize -= 2 + sizeof(uint32_t) * 3;
- // Read current working directory of daemon:
- std::string dinit_cwd = read_string(socknum, rbuffer, cwd_len);
- // dinit daemon base directory against which service paths are resolved is in dinit_cwd
- for (int i = 0; i < (int)path_entries; i++) {
- uint32_t plen;
- fill_buffer_to(rbuffer, socknum, sizeof(uint32_t));
- rbuffer.extract(&plen, 0, sizeof(uint32_t));
- rbuffer.consume(sizeof(uint32_t));
- paths.push_back(read_string(socknum, rbuffer, plen));
- }
- // all service directories are now in the 'paths' vector
- // Load/read service description for 'from' service:
- ifstream service_file;
- string service_file_path;
- for (std::string path : paths) {
- string test_path = combine_paths(combine_paths(dinit_cwd, path.c_str()), from);
- service_file.open(test_path.c_str(), ios::in);
- if (service_file) {
- service_file_path = test_path;
- break;
- }
- }
- if (! service_file) {
- cerr << "dinitctl: could not locate service file for service '" << from << "'" << endl;
- return 1;
- }
- // We now need to read the service file, identify the waits-for.d directory (bail out if more than one),
- // make sure the service is not listed as a dependency individually.
- string waits_for_d;
- try {
- process_service_file(from, service_file, [&](string &line, string &setting,
- dinit_load::string_iterator i, dinit_load::string_iterator end) -> void {
- if (setting == "waits-for" || setting == "depends-on" || setting == "depends-ms") {
- string dname = dinit_load::read_setting_value(i, end);
- if (dname == to) {
- // There is already a dependency
- cerr << "dinitctl: there is a fixed dependency to service '" << to
- << "' in the service description of '" << from << "'." << endl;
- throw service_op_cancel();
- }
- }
- else if (setting == "waits-for.d") {
- string dname = dinit_load::read_setting_value(i, end);
- if (! waits_for_d.empty()) {
- cerr << "dinitctl: service '" << from << "' has multiple waits-for.d directories "
- << "specified in service description" << endl;
- throw service_op_cancel();
- }
- waits_for_d = std::move(dname);
- }
- });
- }
- catch (const service_op_cancel &cexc) {
- return 1;
- }
- // If the from service has no waits-for.d specified, we can't continue
- if (waits_for_d.empty()) {
- cerr << "dinitctl: service '" << from << "' has no waits-for.d directory specified" << endl;
- return 1;
- }
- // The waits-for.d path is relative to the service file path, combine:
- string waits_for_d_full = combine_paths(parent_path(service_file_path), waits_for_d.c_str());
- // check if dependency already exists
- string dep_link_path = combine_paths(waits_for_d_full, to);
- struct stat stat_buf;
- if (lstat(dep_link_path.c_str(), &stat_buf) == -1) {
- if (errno != ENOENT) {
- cerr << "dinitctl: checking for existing dependency link: " << dep_link_path << ": "
- << strerror(errno) << endl;
- return 1;
- }
- }
- else {
- // dependency already exists
- if (enable) {
- cerr << "dinitctl: service already enabled." << endl;
- return 1;
- }
- }
- // warn if 'from' service is not started
- if (enable && from_state != service_state_t::STARTED) {
- cerr << "dinitctl: warning: enabling dependency for non-started service" << endl;
- }
- // add/remove dependency
- constexpr int enable_pktsize = 2 + sizeof(handle_t) * 2;
- char cmdbuf[enable_pktsize] = { char(enable ? DINIT_CP_ENABLESERVICE : DINIT_CP_REM_DEP),
- char(dependency_type::WAITS_FOR)};
- memcpy(cmdbuf + 2, &from_handle, sizeof(from_handle));
- memcpy(cmdbuf + 2 + sizeof(from_handle), &to_handle, sizeof(to_handle));
- write_all_x(socknum, cmdbuf, enable_pktsize);
- wait_for_reply(rbuffer, socknum);
- // check reply
- if (enable && rbuffer[0] == DINIT_RP_NAK) {
- cerr << "dinitctl: could not enable service: possible circular dependency" << endl;
- return 1;
- }
- if (rbuffer[0] != DINIT_RP_ACK) {
- cerr << "dinitctl: control socket protocol error" << endl;
- return 1;
- }
- // create link
- if (enable) {
- if (symlink((string("../") + to).c_str(), dep_link_path.c_str()) == -1) {
- cerr << "dinitctl: could not create symlink at " << dep_link_path << ": " << strerror(errno)
- << "\n" "dinitctl: note: service was enabled for now; persistent enable failed."
- << endl;
- return 1;
- }
- }
- else {
- if (unlink(dep_link_path.c_str()) == -1) {
- cerr << "dinitctl: could not unlink dependency entry " << dep_link_path << ": "
- << strerror(errno) << "\n"
- "dinitctl: note: service was disabled for now; persistent disable failed." << endl;
- return 1;
- }
- }
- if (verbose) {
- cout << "Service '" << to << "' has been " << (enable ? "enabled" : "disabled") << "." << endl;
- }
- return 0;
- }
- static int do_setenv(int socknum, cpbuffer_t &rbuffer, std::vector<const char *> &env_names)
- {
- using namespace std;
- string buf;
- for (const char *envp : env_names) {
- buf.clear();
- buf.reserve(6);
- // protocol message and size space
- buf.push_back(DINIT_CP_SETENV);
- buf.append(2, 0);
- // either full var or name
- auto elen = strlen(envp);
- buf.append(envp, elen);
- // = not found, get value from environment
- if (!memchr(envp, '=', elen)) {
- buf.push_back('=');
- auto *envv = getenv(envp);
- if (envv) {
- buf.append(envv);
- }
- }
- uint16_t bufs = buf.size() - 3;
- // sanitize length early on
- if (bufs > (1024 - 3)) {
- auto eq = buf.find('=', 3);
- auto name = buf.substr(3, eq - 3);
- cerr << "dinitctl: environment variable '" << name << "' too long." << endl;
- return 1;
- }
- // set size in protocol message
- memcpy(&buf[1], &bufs, 2);
- // send
- write_all_x(socknum, buf.data(), bufs + 3);
- wait_for_reply(rbuffer, socknum);
- if (rbuffer[0] == DINIT_RP_BADREQ) {
- cerr << "dinitctl: failed to export environment." << endl;
- return 1;
- } else if (rbuffer[0] != DINIT_RP_ACK) {
- throw dinit_protocol_error();
- }
- rbuffer.consume(1);
- }
- return 0;
- }
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