/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2013 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <sys/socket.h> #include <unistd.h> #include <errno.h> #include <string.h> #include <getopt.h> #include <pwd.h> #include <locale.h> #include <fcntl.h> #include <netinet/in.h> #include <arpa/inet.h> #include <net/if.h> #include "sd-bus.h" #include "log.h" #include "util.h" #include "macro.h" #include "pager.h" #include "bus-util.h" #include "bus-error.h" #include "build.h" #include "strv.h" #include "unit-name.h" #include "cgroup-show.h" #include "cgroup-util.h" #include "ptyfwd.h" #include "event-util.h" static char **arg_property = NULL; static bool arg_all = false; static bool arg_full = false; static bool arg_no_pager = false; static bool arg_legend = true; static const char *arg_kill_who = NULL; static int arg_signal = SIGTERM; static BusTransport arg_transport = BUS_TRANSPORT_LOCAL; static char *arg_host = NULL; static void pager_open_if_enabled(void) { /* Cache result before we open the pager */ if (arg_no_pager) return; pager_open(false); } static int list_machines(sd_bus *bus, char **args, unsigned n) { _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; const char *name, *class, *service, *object; unsigned k = 0; int r; pager_open_if_enabled(); r = sd_bus_call_method( bus, "org.freedesktop.machine1", "/org/freedesktop/machine1", "org.freedesktop.machine1.Manager", "ListMachines", &error, &reply, ""); if (r < 0) { log_error("Could not get machines: %s", bus_error_message(&error, -r)); return r; } if (arg_legend) printf("%-32s %-9s %-16s\n", "MACHINE", "CONTAINER", "SERVICE"); r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "(ssso)"); if (r < 0) return bus_log_parse_error(r); while ((r = sd_bus_message_read(reply, "(ssso)", &name, &class, &service, &object)) > 0) { printf("%-32s %-9s %-16s\n", name, class, service); k++; } if (r < 0) return bus_log_parse_error(r); r = sd_bus_message_exit_container(reply); if (r < 0) return bus_log_parse_error(r); if (arg_legend) printf("\n%u machines listed.\n", k); return 0; } static int show_unit_cgroup(sd_bus *bus, const char *unit, pid_t leader) { _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; _cleanup_free_ char *path = NULL; const char *cgroup; int r, output_flags; unsigned c; assert(bus); assert(unit); if (arg_transport == BUS_TRANSPORT_REMOTE) return 0; path = unit_dbus_path_from_name(unit); if (!path) return log_oom(); r = sd_bus_get_property( bus, "org.freedesktop.systemd1", path, endswith(unit, ".scope") ? "org.freedesktop.systemd1.Scope" : "org.freedesktop.systemd1.Service", "ControlGroup", &error, &reply, "s"); if (r < 0) { log_error("Failed to query ControlGroup: %s", bus_error_message(&error, -r)); return r; } r = sd_bus_message_read(reply, "s", &cgroup); if (r < 0) return bus_log_parse_error(r); if (isempty(cgroup)) return 0; if (cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, cgroup, false) != 0 && leader <= 0) return 0; output_flags = arg_all * OUTPUT_SHOW_ALL | arg_full * OUTPUT_FULL_WIDTH; c = columns(); if (c > 18) c -= 18; else c = 0; show_cgroup_and_extra(SYSTEMD_CGROUP_CONTROLLER, cgroup, "\t\t ", c, false, &leader, leader > 0, output_flags); return 0; } static int print_addresses(sd_bus *bus, const char *name, int ifi, const char *prefix, const char *prefix2) { _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; int r; assert(bus); assert(name); assert(prefix); assert(prefix2); r = sd_bus_call_method(bus, "org.freedesktop.machine1", "/org/freedesktop/machine1", "org.freedesktop.machine1.Manager", "GetMachineAddresses", NULL, &reply, "s", name); if (r < 0) return r; r = sd_bus_message_enter_container(reply, 'a', "(iay)"); if (r < 0) return bus_log_parse_error(r); while ((r = sd_bus_message_enter_container(reply, 'r', "iay")) > 0) { int family; const void *a; size_t sz; char buffer[MAX(INET6_ADDRSTRLEN, INET_ADDRSTRLEN)]; r = sd_bus_message_read(reply, "i", &family); if (r < 0) return bus_log_parse_error(r); r = sd_bus_message_read_array(reply, 'y', &a, &sz); if (r < 0) return bus_log_parse_error(r); fputs(prefix, stdout); fputs(inet_ntop(family, a, buffer, sizeof(buffer)), stdout); if (family == AF_INET6 && ifi > 0) printf("%%%i", ifi); fputc('\n', stdout); r = sd_bus_message_exit_container(reply); if (r < 0) return bus_log_parse_error(r); if (prefix != prefix2) prefix = prefix2; } if (r < 0) return bus_log_parse_error(r); r = sd_bus_message_exit_container(reply); if (r < 0) return bus_log_parse_error(r); return 0; } static int print_os_release(sd_bus *bus, const char *name, const char *prefix) { _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; const char *k, *v, *pretty = NULL; int r; assert(bus); assert(name); assert(prefix); r = sd_bus_call_method(bus, "org.freedesktop.machine1", "/org/freedesktop/machine1", "org.freedesktop.machine1.Manager", "GetMachineOSRelease", NULL, &reply, "s", name); if (r < 0) return r; r = sd_bus_message_enter_container(reply, 'a', "{ss}"); if (r < 0) return bus_log_parse_error(r); while ((r = sd_bus_message_read(reply, "{ss}", &k, &v)) > 0) { if (streq(k, "PRETTY_NAME")) pretty = v; } if (r < 0) return bus_log_parse_error(r); r = sd_bus_message_exit_container(reply); if (r < 0) return bus_log_parse_error(r); if (pretty) printf("%s%s\n", prefix, pretty); return 0; } typedef struct MachineStatusInfo { char *name; sd_id128_t id; char *class; char *service; char *unit; char *root_directory; pid_t leader; usec_t timestamp; int *netif; unsigned n_netif; } MachineStatusInfo; static void print_machine_status_info(sd_bus *bus, MachineStatusInfo *i) { char since1[FORMAT_TIMESTAMP_RELATIVE_MAX], *s1; char since2[FORMAT_TIMESTAMP_MAX], *s2; int ifi = -1; assert(i); fputs(strna(i->name), stdout); if (!sd_id128_equal(i->id, SD_ID128_NULL)) printf("(" SD_ID128_FORMAT_STR ")\n", SD_ID128_FORMAT_VAL(i->id)); else putchar('\n'); s1 = format_timestamp_relative(since1, sizeof(since1), i->timestamp); s2 = format_timestamp(since2, sizeof(since2), i->timestamp); if (s1) printf("\t Since: %s; %s\n", s2, s1); else if (s2) printf("\t Since: %s\n", s2); if (i->leader > 0) { _cleanup_free_ char *t = NULL; printf("\t Leader: %u", (unsigned) i->leader); get_process_comm(i->leader, &t); if (t) printf(" (%s)", t); putchar('\n'); } if (i->service) { printf("\t Service: %s", i->service); if (i->class) printf("; class %s", i->class); putchar('\n'); } else if (i->class) printf("\t Class: %s\n", i->class); if (i->root_directory) printf("\t Root: %s\n", i->root_directory); if (i->n_netif > 0) { unsigned c; fputs("\t Iface:", stdout); for (c = 0; c < i->n_netif; c++) { char name[IF_NAMESIZE+1] = ""; if (if_indextoname(i->netif[c], name)) { fputc(' ', stdout); fputs(name, stdout); if (ifi < 0) ifi = i->netif[c]; else ifi = 0; } else printf(" %i", i->netif[c]); } fputc('\n', stdout); } print_addresses(bus, i->name, ifi, "\t Address: ", "\t "); print_os_release(bus, i->name, "\t OS: "); if (i->unit) { printf("\t Unit: %s\n", i->unit); show_unit_cgroup(bus, i->unit, i->leader); } } static int map_netif(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) { MachineStatusInfo *i = userdata; size_t l; const void *v; int r; assert_cc(sizeof(int32_t) == sizeof(int)); r = sd_bus_message_read_array(m, SD_BUS_TYPE_INT32, &v, &l); if (r < 0) return r; if (r == 0) return -EBADMSG; i->n_netif = l / sizeof(int32_t); i->netif = memdup(v, l); if (!i->netif) return -ENOMEM; return 0; } static int show_info(const char *verb, sd_bus *bus, const char *path, bool *new_line) { static const struct bus_properties_map map[] = { { "Name", "s", NULL, offsetof(MachineStatusInfo, name) }, { "Class", "s", NULL, offsetof(MachineStatusInfo, class) }, { "Service", "s", NULL, offsetof(MachineStatusInfo, service) }, { "Unit", "s", NULL, offsetof(MachineStatusInfo, unit) }, { "RootDirectory", "s", NULL, offsetof(MachineStatusInfo, root_directory) }, { "Leader", "u", NULL, offsetof(MachineStatusInfo, leader) }, { "Timestamp", "t", NULL, offsetof(MachineStatusInfo, timestamp) }, { "Id", "ay", bus_map_id128, offsetof(MachineStatusInfo, id) }, { "NetworkInterfaces", "ai", map_netif, 0 }, {} }; MachineStatusInfo info = {}; int r; assert(path); assert(new_line); r = bus_map_all_properties(bus, "org.freedesktop.machine1", path, map, &info); if (r < 0) { log_error_errno(r, "Could not get properties: %m"); return r; } if (*new_line) printf("\n"); *new_line = true; print_machine_status_info(bus, &info); free(info.name); free(info.class); free(info.service); free(info.unit); free(info.root_directory); free(info.netif); return r; } static int show_properties(sd_bus *bus, const char *path, bool *new_line) { int r; if (*new_line) printf("\n"); *new_line = true; r = bus_print_all_properties(bus, "org.freedesktop.machine1", path, arg_property, arg_all); if (r < 0) log_error_errno(r, "Could not get properties: %m"); return r; } static int show(sd_bus *bus, char **args, unsigned n) { _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; int r = 0; unsigned i; bool properties, new_line = false; assert(bus); assert(args); properties = !strstr(args[0], "status"); pager_open_if_enabled(); if (properties && n <= 1) { /* If no argument is specified, inspect the manager * itself */ r = show_properties(bus, "/org/freedesktop/machine1", &new_line); if (r < 0) return r; } for (i = 1; i < n; i++) { const char *path = NULL; r = sd_bus_call_method( bus, "org.freedesktop.machine1", "/org/freedesktop/machine1", "org.freedesktop.machine1.Manager", "GetMachine", &error, &reply, "s", args[i]); if (r < 0) { log_error("Could not get path to machine: %s", bus_error_message(&error, -r)); return r; } r = sd_bus_message_read(reply, "o", &path); if (r < 0) return bus_log_parse_error(r); if (properties) r = show_properties(bus, path, &new_line); else r = show_info(args[0], bus, path, &new_line); } return r; } static int kill_machine(sd_bus *bus, char **args, unsigned n) { _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; unsigned i; assert(args); if (!arg_kill_who) arg_kill_who = "all"; for (i = 1; i < n; i++) { int r; r = sd_bus_call_method( bus, "org.freedesktop.machine1", "/org/freedesktop/machine1", "org.freedesktop.machine1.Manager", "KillMachine", &error, NULL, "ssi", args[i], arg_kill_who, arg_signal); if (r < 0) { log_error("Could not kill machine: %s", bus_error_message(&error, -r)); return r; } } return 0; } static int reboot_machine(sd_bus *bus, char **args, unsigned n) { arg_kill_who = "leader"; arg_signal = SIGINT; /* sysvinit + systemd */ return kill_machine(bus, args, n); } static int poweroff_machine(sd_bus *bus, char **args, unsigned n) { arg_kill_who = "leader"; arg_signal = SIGRTMIN+4; /* only systemd */ return kill_machine(bus, args, n); } static int terminate_machine(sd_bus *bus, char **args, unsigned n) { _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; unsigned i; assert(args); for (i = 1; i < n; i++) { int r; r = sd_bus_call_method( bus, "org.freedesktop.machine1", "/org/freedesktop/machine1", "org.freedesktop.machine1.Manager", "TerminateMachine", &error, NULL, "s", args[i]); if (r < 0) { log_error("Could not terminate machine: %s", bus_error_message(&error, -r)); return r; } } return 0; } static int openpt_in_namespace(pid_t pid, int flags) { _cleanup_close_pair_ int pair[2] = { -1, -1 }; _cleanup_close_ int pidnsfd = -1, mntnsfd = -1, rootfd = -1; union { struct cmsghdr cmsghdr; uint8_t buf[CMSG_SPACE(sizeof(int))]; } control = {}; struct msghdr mh = { .msg_control = &control, .msg_controllen = sizeof(control), }; struct cmsghdr *cmsg; int master = -1, r; pid_t child; siginfo_t si; r = namespace_open(pid, &pidnsfd, &mntnsfd, NULL, &rootfd); if (r < 0) return r; if (socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) < 0) return -errno; child = fork(); if (child < 0) return -errno; if (child == 0) { pair[0] = safe_close(pair[0]); r = namespace_enter(pidnsfd, mntnsfd, -1, rootfd); if (r < 0) _exit(EXIT_FAILURE); master = posix_openpt(flags); if (master < 0) _exit(EXIT_FAILURE); cmsg = CMSG_FIRSTHDR(&mh); cmsg->cmsg_level = SOL_SOCKET; cmsg->cmsg_type = SCM_RIGHTS; cmsg->cmsg_len = CMSG_LEN(sizeof(int)); memcpy(CMSG_DATA(cmsg), &master, sizeof(int)); mh.msg_controllen = cmsg->cmsg_len; if (sendmsg(pair[1], &mh, MSG_NOSIGNAL) < 0) _exit(EXIT_FAILURE); _exit(EXIT_SUCCESS); } pair[1] = safe_close(pair[1]); r = wait_for_terminate(child, &si); if (r < 0) return r; if (si.si_code != CLD_EXITED || si.si_status != EXIT_SUCCESS) return -EIO; if (recvmsg(pair[0], &mh, MSG_NOSIGNAL|MSG_CMSG_CLOEXEC) < 0) return -errno; for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg)) if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS) { int *fds; unsigned n_fds; fds = (int*) CMSG_DATA(cmsg); n_fds = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int); if (n_fds != 1) { close_many(fds, n_fds); return -EIO; } master = fds[0]; } if (master < 0) return -EIO; return master; } static int login_machine(sd_bus *bus, char **args, unsigned n) { _cleanup_bus_message_unref_ sd_bus_message *reply = NULL, *reply2 = NULL, *reply3 = NULL; _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; _cleanup_bus_close_unref_ sd_bus *container_bus = NULL; _cleanup_(pty_forward_freep) PTYForward *forward = NULL; _cleanup_event_unref_ sd_event *event = NULL; _cleanup_close_ int master = -1; _cleanup_free_ char *getty = NULL; const char *path, *pty, *p; uint32_t leader; sigset_t mask; int r, ret = 0; assert(bus); assert(args); if (arg_transport != BUS_TRANSPORT_LOCAL) { log_error("Login only supported on local machines."); return -ENOTSUP; } r = sd_event_default(&event); if (r < 0) { log_error_errno(r, "Failed to get event loop: %m"); return r; } r = sd_bus_attach_event(bus, event, 0); if (r < 0) { log_error_errno(r, "Failed to attach bus to event loop: %m"); return r; } r = sd_bus_call_method( bus, "org.freedesktop.machine1", "/org/freedesktop/machine1", "org.freedesktop.machine1.Manager", "GetMachine", &error, &reply, "s", args[1]); if (r < 0) { log_error("Could not get path to machine: %s", bus_error_message(&error, -r)); return r; } r = sd_bus_message_read(reply, "o", &path); if (r < 0) return bus_log_parse_error(r); r = sd_bus_get_property( bus, "org.freedesktop.machine1", path, "org.freedesktop.machine1.Machine", "Leader", &error, &reply2, "u"); if (r < 0) { log_error_errno(r, "Failed to retrieve PID of leader: %m"); return r; } r = sd_bus_message_read(reply2, "u", &leader); if (r < 0) return bus_log_parse_error(r); master = openpt_in_namespace(leader, O_RDWR|O_NOCTTY|O_CLOEXEC|O_NDELAY); if (master < 0) { log_error_errno(master, "Failed to acquire pseudo tty: %m"); return master; } pty = ptsname(master); if (!pty) { log_error("Failed to get pty name: %m"); return -errno; } p = startswith(pty, "/dev/pts/"); if (!p) { log_error("Invalid pty name %s.", pty); return -EIO; } r = sd_bus_open_system_container(&container_bus, args[1]); if (r < 0) { log_error_errno(r, "Failed to get container bus: %m"); return r; } getty = strjoin("container-getty@", p, ".service", NULL); if (!getty) return log_oom(); if (unlockpt(master) < 0) { log_error("Failed to unlock tty: %m"); return -errno; } r = sd_bus_call_method(container_bus, "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "StartUnit", &error, &reply3, "ss", getty, "replace"); if (r < 0) { log_error("Failed to start getty service: %s", bus_error_message(&error, r)); return r; } container_bus = sd_bus_unref(container_bus); assert_se(sigemptyset(&mask) == 0); sigset_add_many(&mask, SIGWINCH, SIGTERM, SIGINT, -1); assert_se(sigprocmask(SIG_BLOCK, &mask, NULL) == 0); log_info("Connected to container %s. Press ^] three times within 1s to exit session.", args[1]); sd_event_add_signal(event, NULL, SIGINT, NULL, NULL); sd_event_add_signal(event, NULL, SIGTERM, NULL, NULL); r = pty_forward_new(event, master, &forward); if (r < 0) { log_error_errno(r, "Failed to create PTY forwarder: %m"); return r; } r = sd_event_loop(event); if (r < 0) { log_error_errno(r, "Failed to run event loop: %m"); return r; } forward = pty_forward_free(forward); fputc('\n', stdout); log_info("Connection to container %s terminated.", args[1]); sd_event_get_exit_code(event, &ret); return ret; } static void help(void) { printf("%s [OPTIONS...] {COMMAND} ...\n\n" "Send control commands to or query the virtual machine and container registration manager.\n\n" " -h --help Show this help\n" " --version Show package version\n" " --no-pager Do not pipe output into a pager\n" " --no-legend Do not show the headers and footers\n" " -H --host=[USER@]HOST Operate on remote host\n" " -M --machine=CONTAINER Operate on local container\n" " -p --property=NAME Show only properties by this name\n" " -a --all Show all properties, including empty ones\n" " -l --full Do not ellipsize output\n" " --kill-who=WHO Who to send signal to\n" " -s --signal=SIGNAL Which signal to send\n\n" "Commands:\n" " list List running VMs and containers\n" " status NAME... Show VM/container status\n" " show NAME... Show properties of one or more VMs/containers\n" " login NAME Get a login prompt on a container\n" " poweroff NAME... Power off one or more containers\n" " reboot NAME... Reboot one or more containers\n" " kill NAME... Send signal to processes of a VM/container\n" " terminate NAME... Terminate one or more VMs/containers\n", program_invocation_short_name); } static int parse_argv(int argc, char *argv[]) { enum { ARG_VERSION = 0x100, ARG_NO_PAGER, ARG_NO_LEGEND, ARG_KILL_WHO, }; static const struct option options[] = { { "help", no_argument, NULL, 'h' }, { "version", no_argument, NULL, ARG_VERSION }, { "property", required_argument, NULL, 'p' }, { "all", no_argument, NULL, 'a' }, { "full", no_argument, NULL, 'l' }, { "no-pager", no_argument, NULL, ARG_NO_PAGER }, { "no-legend", no_argument, NULL, ARG_NO_LEGEND }, { "kill-who", required_argument, NULL, ARG_KILL_WHO }, { "signal", required_argument, NULL, 's' }, { "host", required_argument, NULL, 'H' }, { "machine", required_argument, NULL, 'M' }, {} }; int c, r; assert(argc >= 0); assert(argv); while ((c = getopt_long(argc, argv, "hp:als:H:M:", options, NULL)) >= 0) switch (c) { case 'h': help(); return 0; case ARG_VERSION: puts(PACKAGE_STRING); puts(SYSTEMD_FEATURES); return 0; case 'p': r = strv_extend(&arg_property, optarg); if (r < 0) return log_oom(); /* If the user asked for a particular * property, show it to him, even if it is * empty. */ arg_all = true; break; case 'a': arg_all = true; break; case 'l': arg_full = true; break; case ARG_NO_PAGER: arg_no_pager = true; break; case ARG_NO_LEGEND: arg_legend = false; break; case ARG_KILL_WHO: arg_kill_who = optarg; break; case 's': arg_signal = signal_from_string_try_harder(optarg); if (arg_signal < 0) { log_error("Failed to parse signal string %s.", optarg); return -EINVAL; } break; case 'H': arg_transport = BUS_TRANSPORT_REMOTE; arg_host = optarg; break; case 'M': arg_transport = BUS_TRANSPORT_CONTAINER; arg_host = optarg; break; case '?': return -EINVAL; default: assert_not_reached("Unhandled option"); } return 1; } static int machinectl_main(sd_bus *bus, int argc, char *argv[]) { static const struct { const char* verb; const enum { MORE, LESS, EQUAL } argc_cmp; const int argc; int (* const dispatch)(sd_bus *bus, char **args, unsigned n); } verbs[] = { { "list", LESS, 1, list_machines }, { "status", MORE, 2, show }, { "show", MORE, 1, show }, { "terminate", MORE, 2, terminate_machine }, { "reboot", MORE, 2, reboot_machine }, { "poweroff", MORE, 2, poweroff_machine }, { "kill", MORE, 2, kill_machine }, { "login", MORE, 2, login_machine }, }; int left; unsigned i; assert(argc >= 0); assert(argv); left = argc - optind; if (left <= 0) /* Special rule: no arguments means "list" */ i = 0; else { if (streq(argv[optind], "help")) { help(); return 0; } for (i = 0; i < ELEMENTSOF(verbs); i++) if (streq(argv[optind], verbs[i].verb)) break; if (i >= ELEMENTSOF(verbs)) { log_error("Unknown operation %s", argv[optind]); return -EINVAL; } } switch (verbs[i].argc_cmp) { case EQUAL: if (left != verbs[i].argc) { log_error("Invalid number of arguments."); return -EINVAL; } break; case MORE: if (left < verbs[i].argc) { log_error("Too few arguments."); return -EINVAL; } break; case LESS: if (left > verbs[i].argc) { log_error("Too many arguments."); return -EINVAL; } break; default: assert_not_reached("Unknown comparison operator."); } return verbs[i].dispatch(bus, argv + optind, left); } int main(int argc, char*argv[]) { _cleanup_bus_close_unref_ sd_bus *bus = NULL; int r; setlocale(LC_ALL, ""); log_parse_environment(); log_open(); r = parse_argv(argc, argv); if (r <= 0) goto finish; r = bus_open_transport(arg_transport, arg_host, false, &bus); if (r < 0) { log_error_errno(r, "Failed to create bus connection: %m"); goto finish; } r = machinectl_main(bus, argc, argv); finish: pager_close(); strv_free(arg_property); return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }