/*-*- 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 <getopt.h> #include <stdio.h> #include "sd-bus.h" #include "sd-event.h" #include "bus-error.h" #include "bus-util.h" #include "calendarspec.h" #include "env-util.h" #include "event-util.h" #include "formats-util.h" #include "path-util.h" #include "ptyfwd.h" #include "signal-util.h" #include "spawn-polkit-agent.h" #include "strv.h" #include "terminal-util.h" #include "unit-name.h" static bool arg_ask_password = true; static bool arg_scope = false; static bool arg_remain_after_exit = false; static bool arg_no_block = false; static const char *arg_unit = NULL; static const char *arg_description = NULL; static const char *arg_slice = NULL; static bool arg_send_sighup = false; static BusTransport arg_transport = BUS_TRANSPORT_LOCAL; static const char *arg_host = NULL; static bool arg_user = false; static const char *arg_service_type = NULL; static const char *arg_exec_user = NULL; static const char *arg_exec_group = NULL; static int arg_nice = 0; static bool arg_nice_set = false; static char **arg_environment = NULL; static char **arg_property = NULL; static bool arg_pty = false; static usec_t arg_on_active = 0; static usec_t arg_on_boot = 0; static usec_t arg_on_startup = 0; static usec_t arg_on_unit_active = 0; static usec_t arg_on_unit_inactive = 0; static const char *arg_on_calendar = NULL; static char **arg_timer_property = NULL; static bool arg_quiet = false; static void polkit_agent_open_if_enabled(void) { /* Open the polkit agent as a child process if necessary */ if (!arg_ask_password) return; if (arg_transport != BUS_TRANSPORT_LOCAL) return; polkit_agent_open(); } static void help(void) { printf("%s [OPTIONS...] {COMMAND} [ARGS...]\n\n" "Run the specified command in a transient scope or service or timer\n" "unit. If timer option is specified and unit is exist which is\n" "specified with --unit option then command can be omitted.\n\n" " -h --help Show this help\n" " --version Show package version\n" " --no-ask-password Do not prompt for password\n" " --user Run as user unit\n" " -H --host=[USER@]HOST Operate on remote host\n" " -M --machine=CONTAINER Operate on local container\n" " --scope Run this as scope rather than service\n" " --unit=UNIT Run under the specified unit name\n" " -p --property=NAME=VALUE Set unit property\n" " --description=TEXT Description for unit\n" " --slice=SLICE Run in the specified slice\n" " --no-block Do not wait until operation finished\n" " -r --remain-after-exit Leave service around until explicitly stopped\n" " --send-sighup Send SIGHUP when terminating\n" " --service-type=TYPE Service type\n" " --uid=USER Run as system user\n" " --gid=GROUP Run as system group\n" " --nice=NICE Nice level\n" " --setenv=NAME=VALUE Set environment\n" " -t --pty Run service on pseudo tty\n" " -q --quiet Suppress information messages during runtime\n\n" "Timer options:\n\n" " --on-active=SECONDS Run after SECONDS delay\n" " --on-boot=SECONDS Run SECONDS after machine was booted up\n" " --on-startup=SECONDS Run SECONDS after systemd activation\n" " --on-unit-active=SECONDS Run SECONDS after the last activation\n" " --on-unit-inactive=SECONDS Run SECONDS after the last deactivation\n" " --on-calendar=SPEC Realtime timer\n" " --timer-property=NAME=VALUE Set timer unit property\n", program_invocation_short_name); } static bool with_timer(void) { return arg_on_active || arg_on_boot || arg_on_startup || arg_on_unit_active || arg_on_unit_inactive || arg_on_calendar; } static int parse_argv(int argc, char *argv[]) { enum { ARG_VERSION = 0x100, ARG_NO_ASK_PASSWORD, ARG_USER, ARG_SYSTEM, ARG_SCOPE, ARG_UNIT, ARG_DESCRIPTION, ARG_SLICE, ARG_SEND_SIGHUP, ARG_EXEC_USER, ARG_EXEC_GROUP, ARG_SERVICE_TYPE, ARG_NICE, ARG_SETENV, ARG_TTY, ARG_ON_ACTIVE, ARG_ON_BOOT, ARG_ON_STARTUP, ARG_ON_UNIT_ACTIVE, ARG_ON_UNIT_INACTIVE, ARG_ON_CALENDAR, ARG_TIMER_PROPERTY, ARG_NO_BLOCK, }; static const struct option options[] = { { "help", no_argument, NULL, 'h' }, { "version", no_argument, NULL, ARG_VERSION }, { "user", no_argument, NULL, ARG_USER }, { "system", no_argument, NULL, ARG_SYSTEM }, { "scope", no_argument, NULL, ARG_SCOPE }, { "unit", required_argument, NULL, ARG_UNIT }, { "description", required_argument, NULL, ARG_DESCRIPTION }, { "slice", required_argument, NULL, ARG_SLICE }, { "remain-after-exit", no_argument, NULL, 'r' }, { "send-sighup", no_argument, NULL, ARG_SEND_SIGHUP }, { "host", required_argument, NULL, 'H' }, { "machine", required_argument, NULL, 'M' }, { "service-type", required_argument, NULL, ARG_SERVICE_TYPE }, { "uid", required_argument, NULL, ARG_EXEC_USER }, { "gid", required_argument, NULL, ARG_EXEC_GROUP }, { "nice", required_argument, NULL, ARG_NICE }, { "setenv", required_argument, NULL, ARG_SETENV }, { "property", required_argument, NULL, 'p' }, { "tty", no_argument, NULL, 't' }, { "quiet", no_argument, NULL, 'q' }, { "on-active", required_argument, NULL, ARG_ON_ACTIVE }, { "on-boot", required_argument, NULL, ARG_ON_BOOT }, { "on-startup", required_argument, NULL, ARG_ON_STARTUP }, { "on-unit-active", required_argument, NULL, ARG_ON_UNIT_ACTIVE }, { "on-unit-inactive", required_argument, NULL, ARG_ON_UNIT_INACTIVE }, { "on-calendar", required_argument, NULL, ARG_ON_CALENDAR }, { "timer-property", required_argument, NULL, ARG_TIMER_PROPERTY }, { "no-block", no_argument, NULL, ARG_NO_BLOCK }, { "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD }, {}, }; int r, c; assert(argc >= 0); assert(argv); while ((c = getopt_long(argc, argv, "+hrH:M:p:tq", options, NULL)) >= 0) switch (c) { case 'h': help(); return 0; case ARG_NO_ASK_PASSWORD: arg_ask_password = false; break; case ARG_VERSION: return version(); case ARG_USER: arg_user = true; break; case ARG_SYSTEM: arg_user = false; break; case ARG_SCOPE: arg_scope = true; break; case ARG_UNIT: arg_unit = optarg; break; case ARG_DESCRIPTION: arg_description = optarg; break; case ARG_SLICE: arg_slice = optarg; break; case ARG_SEND_SIGHUP: arg_send_sighup = true; break; case 'r': arg_remain_after_exit = true; break; case 'H': arg_transport = BUS_TRANSPORT_REMOTE; arg_host = optarg; break; case 'M': arg_transport = BUS_TRANSPORT_MACHINE; arg_host = optarg; break; case ARG_SERVICE_TYPE: arg_service_type = optarg; break; case ARG_EXEC_USER: arg_exec_user = optarg; break; case ARG_EXEC_GROUP: arg_exec_group = optarg; break; case ARG_NICE: r = safe_atoi(optarg, &arg_nice); if (r < 0 || arg_nice < PRIO_MIN || arg_nice >= PRIO_MAX) { log_error("Failed to parse nice value"); return -EINVAL; } arg_nice_set = true; break; case ARG_SETENV: if (strv_extend(&arg_environment, optarg) < 0) return log_oom(); break; case 'p': if (strv_extend(&arg_property, optarg) < 0) return log_oom(); break; case 't': arg_pty = true; break; case 'q': arg_quiet = true; break; case ARG_ON_ACTIVE: r = parse_sec(optarg, &arg_on_active); if (r < 0) { log_error("Failed to parse timer value: %s", optarg); return r; } break; case ARG_ON_BOOT: r = parse_sec(optarg, &arg_on_boot); if (r < 0) { log_error("Failed to parse timer value: %s", optarg); return r; } break; case ARG_ON_STARTUP: r = parse_sec(optarg, &arg_on_startup); if (r < 0) { log_error("Failed to parse timer value: %s", optarg); return r; } break; case ARG_ON_UNIT_ACTIVE: r = parse_sec(optarg, &arg_on_unit_active); if (r < 0) { log_error("Failed to parse timer value: %s", optarg); return r; } break; case ARG_ON_UNIT_INACTIVE: r = parse_sec(optarg, &arg_on_unit_inactive); if (r < 0) { log_error("Failed to parse timer value: %s", optarg); return r; } break; case ARG_ON_CALENDAR: { CalendarSpec *spec = NULL; r = calendar_spec_from_string(optarg, &spec); if (r < 0) { log_error("Invalid calendar spec: %s", optarg); return r; } calendar_spec_free(spec); arg_on_calendar = optarg; break; } case ARG_TIMER_PROPERTY: if (strv_extend(&arg_timer_property, optarg) < 0) return log_oom(); break; case ARG_NO_BLOCK: arg_no_block = true; break; case '?': return -EINVAL; default: assert_not_reached("Unhandled option"); } if ((optind >= argc) && (!arg_unit || !with_timer())) { log_error("Command line to execute required."); return -EINVAL; } if (arg_user && arg_transport != BUS_TRANSPORT_LOCAL) { log_error("Execution in user context is not supported on non-local systems."); return -EINVAL; } if (arg_scope && arg_transport != BUS_TRANSPORT_LOCAL) { log_error("Scope execution is not supported on non-local systems."); return -EINVAL; } if (arg_scope && (arg_remain_after_exit || arg_service_type)) { log_error("--remain-after-exit and --service-type= are not supported in --scope mode."); return -EINVAL; } if (arg_pty && (with_timer() || arg_scope)) { log_error("--pty is not compatible in timer or --scope mode."); return -EINVAL; } if (arg_pty && arg_transport == BUS_TRANSPORT_REMOTE) { log_error("--pty is only supported when connecting to the local system or containers."); return -EINVAL; } if (arg_scope && with_timer()) { log_error("Timer options are not supported in --scope mode."); return -EINVAL; } if (arg_timer_property && !with_timer()) { log_error("--timer-property= has no effect without any other timer options."); return -EINVAL; } return 1; } static int transient_unit_set_properties(sd_bus_message *m, char **properties) { char **i; int r; r = sd_bus_message_append(m, "(sv)", "Description", "s", arg_description); if (r < 0) return r; STRV_FOREACH(i, properties) { r = sd_bus_message_open_container(m, 'r', "sv"); if (r < 0) return r; r = bus_append_unit_property_assignment(m, *i); if (r < 0) return r; r = sd_bus_message_close_container(m); if (r < 0) return r; } return 0; } static int transient_cgroup_set_properties(sd_bus_message *m) { int r; assert(m); if (!isempty(arg_slice)) { _cleanup_free_ char *slice; r = unit_name_mangle_with_suffix(arg_slice, UNIT_NAME_NOGLOB, ".slice", &slice); if (r < 0) return r; r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice); if (r < 0) return r; } return 0; } static int transient_kill_set_properties(sd_bus_message *m) { assert(m); if (arg_send_sighup) return sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", arg_send_sighup); else return 0; } static int transient_service_set_properties(sd_bus_message *m, char **argv, const char *pty_path) { int r; assert(m); r = transient_unit_set_properties(m, arg_property); if (r < 0) return r; r = transient_kill_set_properties(m); if (r < 0) return r; r = transient_cgroup_set_properties(m); if (r < 0) return r; if (arg_remain_after_exit) { r = sd_bus_message_append(m, "(sv)", "RemainAfterExit", "b", arg_remain_after_exit); if (r < 0) return r; } if (arg_service_type) { r = sd_bus_message_append(m, "(sv)", "Type", "s", arg_service_type); if (r < 0) return r; } if (arg_exec_user) { r = sd_bus_message_append(m, "(sv)", "User", "s", arg_exec_user); if (r < 0) return r; } if (arg_exec_group) { r = sd_bus_message_append(m, "(sv)", "Group", "s", arg_exec_group); if (r < 0) return r; } if (arg_nice_set) { r = sd_bus_message_append(m, "(sv)", "Nice", "i", arg_nice); if (r < 0) return r; } if (pty_path) { const char *e; r = sd_bus_message_append(m, "(sv)(sv)(sv)(sv)", "StandardInput", "s", "tty", "StandardOutput", "s", "tty", "StandardError", "s", "tty", "TTYPath", "s", pty_path); if (r < 0) return r; e = getenv("TERM"); if (e) { char *n; n = strjoina("TERM=", e); r = sd_bus_message_append(m, "(sv)", "Environment", "as", 1, n); if (r < 0) return r; } } if (!strv_isempty(arg_environment)) { r = sd_bus_message_open_container(m, 'r', "sv"); if (r < 0) return r; r = sd_bus_message_append(m, "s", "Environment"); if (r < 0) return r; r = sd_bus_message_open_container(m, 'v', "as"); if (r < 0) return r; r = sd_bus_message_append_strv(m, arg_environment); if (r < 0) return r; r = sd_bus_message_close_container(m); if (r < 0) return r; r = sd_bus_message_close_container(m); if (r < 0) return r; } /* Exec container */ { r = sd_bus_message_open_container(m, 'r', "sv"); if (r < 0) return r; r = sd_bus_message_append(m, "s", "ExecStart"); if (r < 0) return r; r = sd_bus_message_open_container(m, 'v', "a(sasb)"); if (r < 0) return r; r = sd_bus_message_open_container(m, 'a', "(sasb)"); if (r < 0) return r; r = sd_bus_message_open_container(m, 'r', "sasb"); if (r < 0) return r; r = sd_bus_message_append(m, "s", argv[0]); if (r < 0) return r; r = sd_bus_message_append_strv(m, argv); if (r < 0) return r; r = sd_bus_message_append(m, "b", false); if (r < 0) return r; r = sd_bus_message_close_container(m); if (r < 0) return r; r = sd_bus_message_close_container(m); if (r < 0) return r; r = sd_bus_message_close_container(m); if (r < 0) return r; r = sd_bus_message_close_container(m); if (r < 0) return r; } return 0; } static int transient_scope_set_properties(sd_bus_message *m) { int r; assert(m); r = transient_unit_set_properties(m, arg_property); if (r < 0) return r; r = transient_kill_set_properties(m); if (r < 0) return r; r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, (uint32_t) getpid()); if (r < 0) return r; return 0; } static int transient_timer_set_properties(sd_bus_message *m) { int r; assert(m); r = transient_unit_set_properties(m, arg_timer_property); if (r < 0) return r; if (arg_on_active) { r = sd_bus_message_append(m, "(sv)", "OnActiveSec", "t", arg_on_active); if (r < 0) return r; } if (arg_on_boot) { r = sd_bus_message_append(m, "(sv)", "OnBootSec", "t", arg_on_boot); if (r < 0) return r; } if (arg_on_startup) { r = sd_bus_message_append(m, "(sv)", "OnStartupSec", "t", arg_on_startup); if (r < 0) return r; } if (arg_on_unit_active) { r = sd_bus_message_append(m, "(sv)", "OnUnitActiveSec", "t", arg_on_unit_active); if (r < 0) return r; } if (arg_on_unit_inactive) { r = sd_bus_message_append(m, "(sv)", "OnUnitInactiveSec", "t", arg_on_unit_inactive); if (r < 0) return r; } if (arg_on_calendar) { r = sd_bus_message_append(m, "(sv)", "OnCalendar", "s", arg_on_calendar); if (r < 0) return r; } return 0; } static int start_transient_service( sd_bus *bus, char **argv) { _cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL; _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL; _cleanup_free_ char *service = NULL, *pty_path = NULL; _cleanup_close_ int master = -1; int r; assert(bus); assert(argv); if (arg_pty) { if (arg_transport == BUS_TRANSPORT_LOCAL) { master = posix_openpt(O_RDWR|O_NOCTTY|O_CLOEXEC|O_NDELAY); if (master < 0) return log_error_errno(errno, "Failed to acquire pseudo tty: %m"); r = ptsname_malloc(master, &pty_path); if (r < 0) return log_error_errno(r, "Failed to determine tty name: %m"); if (unlockpt(master) < 0) return log_error_errno(errno, "Failed to unlock tty: %m"); } else if (arg_transport == BUS_TRANSPORT_MACHINE) { _cleanup_bus_unref_ sd_bus *system_bus = NULL; const char *s; r = sd_bus_default_system(&system_bus); if (r < 0) return log_error_errno(r, "Failed to connect to system bus: %m"); r = sd_bus_call_method(system_bus, "org.freedesktop.machine1", "/org/freedesktop/machine1", "org.freedesktop.machine1.Manager", "OpenMachinePTY", &error, &reply, "s", arg_host); if (r < 0) { log_error("Failed to get machine PTY: %s", bus_error_message(&error, -r)); return r; } r = sd_bus_message_read(reply, "hs", &master, &s); if (r < 0) return bus_log_parse_error(r); reply = sd_bus_message_unref(reply); master = fcntl(master, F_DUPFD_CLOEXEC, 3); if (master < 0) return log_error_errno(errno, "Failed to duplicate master fd: %m"); pty_path = strdup(s); if (!pty_path) return log_oom(); } else assert_not_reached("Can't allocate tty via ssh"); } if (!arg_no_block) { r = bus_wait_for_jobs_new(bus, &w); if (r < 0) return log_error_errno(r, "Could not watch jobs: %m"); } if (arg_unit) { r = unit_name_mangle_with_suffix(arg_unit, UNIT_NAME_NOGLOB, ".service", &service); if (r < 0) return log_error_errno(r, "Failed to mangle unit name: %m"); } else if (asprintf(&service, "run-"PID_FMT".service", getpid()) < 0) return log_oom(); r = sd_bus_message_new_method_call( bus, &m, "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "StartTransientUnit"); if (r < 0) return bus_log_create_error(r); r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password); if (r < 0) return bus_log_create_error(r); /* Name and mode */ r = sd_bus_message_append(m, "ss", service, "fail"); if (r < 0) return bus_log_create_error(r); /* Properties */ r = sd_bus_message_open_container(m, 'a', "(sv)"); if (r < 0) return bus_log_create_error(r); r = transient_service_set_properties(m, argv, pty_path); if (r < 0) return bus_log_create_error(r); r = sd_bus_message_close_container(m); if (r < 0) return bus_log_create_error(r); /* Auxiliary units */ r = sd_bus_message_append(m, "a(sa(sv))", 0); if (r < 0) return bus_log_create_error(r); polkit_agent_open_if_enabled(); r = sd_bus_call(bus, m, 0, &error, &reply); if (r < 0) return log_error_errno(r, "Failed to start transient service unit: %s", bus_error_message(&error, r)); if (w) { const char *object; r = sd_bus_message_read(reply, "o", &object); if (r < 0) return bus_log_parse_error(r); r = bus_wait_for_jobs_one(w, object, arg_quiet); if (r < 0) return r; } if (master >= 0) { _cleanup_(pty_forward_freep) PTYForward *forward = NULL; _cleanup_event_unref_ sd_event *event = NULL; char last_char = 0; r = sd_event_default(&event); if (r < 0) return log_error_errno(r, "Failed to get event loop: %m"); assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGWINCH, SIGTERM, SIGINT, -1) >= 0); (void) sd_event_add_signal(event, NULL, SIGINT, NULL, NULL); (void) sd_event_add_signal(event, NULL, SIGTERM, NULL, NULL); if (!arg_quiet) log_info("Running as unit %s.\nPress ^] three times within 1s to disconnect TTY.", service); r = pty_forward_new(event, master, PTY_FORWARD_IGNORE_INITIAL_VHANGUP, &forward); if (r < 0) return log_error_errno(r, "Failed to create PTY forwarder: %m"); r = sd_event_loop(event); if (r < 0) return log_error_errno(r, "Failed to run event loop: %m"); pty_forward_get_last_char(forward, &last_char); forward = pty_forward_free(forward); if (!arg_quiet && last_char != '\n') fputc('\n', stdout); } else if (!arg_quiet) log_info("Running as unit %s.", service); return 0; } static int start_transient_scope( sd_bus *bus, char **argv) { _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; _cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL; _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL; _cleanup_strv_free_ char **env = NULL, **user_env = NULL; _cleanup_free_ char *scope = NULL; const char *object = NULL; int r; assert(bus); assert(argv); r = bus_wait_for_jobs_new(bus, &w); if (r < 0) return log_oom(); if (arg_unit) { r = unit_name_mangle_with_suffix(arg_unit, UNIT_NAME_NOGLOB, ".scope", &scope); if (r < 0) return log_error_errno(r, "Failed to mangle scope name: %m"); } else if (asprintf(&scope, "run-"PID_FMT".scope", getpid()) < 0) return log_oom(); r = sd_bus_message_new_method_call( bus, &m, "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "StartTransientUnit"); if (r < 0) return bus_log_create_error(r); r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password); if (r < 0) return bus_log_create_error(r); /* Name and Mode */ r = sd_bus_message_append(m, "ss", scope, "fail"); if (r < 0) return bus_log_create_error(r); /* Properties */ r = sd_bus_message_open_container(m, 'a', "(sv)"); if (r < 0) return bus_log_create_error(r); r = transient_scope_set_properties(m); if (r < 0) return bus_log_create_error(r); r = sd_bus_message_close_container(m); if (r < 0) return bus_log_create_error(r); /* Auxiliary units */ r = sd_bus_message_append(m, "a(sa(sv))", 0); if (r < 0) return bus_log_create_error(r); polkit_agent_open_if_enabled(); r = sd_bus_call(bus, m, 0, &error, &reply); if (r < 0) { log_error("Failed to start transient scope unit: %s", bus_error_message(&error, -r)); return r; } if (arg_nice_set) { if (setpriority(PRIO_PROCESS, 0, arg_nice) < 0) return log_error_errno(errno, "Failed to set nice level: %m"); } if (arg_exec_group) { gid_t gid; r = get_group_creds(&arg_exec_group, &gid); if (r < 0) return log_error_errno(r, "Failed to resolve group %s: %m", arg_exec_group); if (setresgid(gid, gid, gid) < 0) return log_error_errno(errno, "Failed to change GID to " GID_FMT ": %m", gid); } if (arg_exec_user) { const char *home, *shell; uid_t uid; gid_t gid; r = get_user_creds(&arg_exec_user, &uid, &gid, &home, &shell); if (r < 0) return log_error_errno(r, "Failed to resolve user %s: %m", arg_exec_user); r = strv_extendf(&user_env, "HOME=%s", home); if (r < 0) return log_oom(); r = strv_extendf(&user_env, "SHELL=%s", shell); if (r < 0) return log_oom(); r = strv_extendf(&user_env, "USER=%s", arg_exec_user); if (r < 0) return log_oom(); r = strv_extendf(&user_env, "LOGNAME=%s", arg_exec_user); if (r < 0) return log_oom(); if (!arg_exec_group) { if (setresgid(gid, gid, gid) < 0) return log_error_errno(errno, "Failed to change GID to " GID_FMT ": %m", gid); } if (setresuid(uid, uid, uid) < 0) return log_error_errno(errno, "Failed to change UID to " UID_FMT ": %m", uid); } env = strv_env_merge(3, environ, user_env, arg_environment); if (!env) return log_oom(); r = sd_bus_message_read(reply, "o", &object); if (r < 0) return bus_log_parse_error(r); r = bus_wait_for_jobs_one(w, object, arg_quiet); if (r < 0) return r; if (!arg_quiet) log_info("Running scope as unit %s.", scope); execvpe(argv[0], argv, env); return log_error_errno(errno, "Failed to execute: %m"); } static int start_transient_timer( sd_bus *bus, char **argv) { _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; _cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL; _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL; _cleanup_free_ char *timer = NULL, *service = NULL; const char *object = NULL; int r; assert(bus); assert(argv); r = bus_wait_for_jobs_new(bus, &w); if (r < 0) return log_oom(); if (arg_unit) { switch (unit_name_to_type(arg_unit)) { case UNIT_SERVICE: service = strdup(arg_unit); if (!service) return log_oom(); r = unit_name_change_suffix(service, ".timer", &timer); if (r < 0) return log_error_errno(r, "Failed to change unit suffix: %m"); break; case UNIT_TIMER: timer = strdup(arg_unit); if (!timer) return log_oom(); r = unit_name_change_suffix(timer, ".service", &service); if (r < 0) return log_error_errno(r, "Failed to change unit suffix: %m"); break; default: r = unit_name_mangle_with_suffix(arg_unit, UNIT_NAME_NOGLOB, ".service", &service); if (r < 0) return log_error_errno(r, "Failed to mangle unit name: %m"); r = unit_name_mangle_with_suffix(arg_unit, UNIT_NAME_NOGLOB, ".timer", &timer); if (r < 0) return log_error_errno(r, "Failed to mangle unit name: %m"); break; } } else if ((asprintf(&service, "run-"PID_FMT".service", getpid()) < 0) || (asprintf(&timer, "run-"PID_FMT".timer", getpid()) < 0)) return log_oom(); r = sd_bus_message_new_method_call( bus, &m, "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "StartTransientUnit"); if (r < 0) return bus_log_create_error(r); r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password); if (r < 0) return bus_log_create_error(r); /* Name and Mode */ r = sd_bus_message_append(m, "ss", timer, "fail"); if (r < 0) return bus_log_create_error(r); /* Properties */ r = sd_bus_message_open_container(m, 'a', "(sv)"); if (r < 0) return bus_log_create_error(r); r = transient_timer_set_properties(m); if (r < 0) return bus_log_create_error(r); r = sd_bus_message_close_container(m); if (r < 0) return bus_log_create_error(r); r = sd_bus_message_open_container(m, 'a', "(sa(sv))"); if (r < 0) return bus_log_create_error(r); if (argv[0]) { r = sd_bus_message_open_container(m, 'r', "sa(sv)"); if (r < 0) return bus_log_create_error(r); r = sd_bus_message_append(m, "s", service); if (r < 0) return bus_log_create_error(r); r = sd_bus_message_open_container(m, 'a', "(sv)"); if (r < 0) return bus_log_create_error(r); r = transient_service_set_properties(m, argv, NULL); if (r < 0) return bus_log_create_error(r); r = sd_bus_message_close_container(m); if (r < 0) return bus_log_create_error(r); r = sd_bus_message_close_container(m); if (r < 0) return bus_log_create_error(r); } r = sd_bus_message_close_container(m); if (r < 0) return bus_log_create_error(r); polkit_agent_open_if_enabled(); r = sd_bus_call(bus, m, 0, &error, &reply); if (r < 0) { log_error("Failed to start transient timer unit: %s", bus_error_message(&error, -r)); return r; } r = sd_bus_message_read(reply, "o", &object); if (r < 0) return bus_log_parse_error(r); r = bus_wait_for_jobs_one(w, object, arg_quiet); if (r < 0) return r; log_info("Running timer as unit %s.", timer); if (argv[0]) log_info("Will run service as unit %s.", service); return 0; } int main(int argc, char* argv[]) { _cleanup_bus_flush_close_unref_ sd_bus *bus = NULL; _cleanup_free_ char *description = NULL, *command = NULL; int r; log_parse_environment(); log_open(); r = parse_argv(argc, argv); if (r <= 0) goto finish; if (argc > optind) { r = find_binary(argv[optind], arg_transport == BUS_TRANSPORT_LOCAL, &command); if (r < 0) { log_error_errno(r, "Failed to find executable %s%s: %m", argv[optind], arg_transport == BUS_TRANSPORT_LOCAL ? "" : " on local system"); goto finish; } argv[optind] = command; } if (!arg_description) { description = strv_join(argv + optind, " "); if (!description) { r = log_oom(); goto finish; } if (arg_unit && isempty(description)) { r = free_and_strdup(&description, arg_unit); if (r < 0) goto finish; } arg_description = description; } r = bus_connect_transport_systemd(arg_transport, arg_host, arg_user, &bus); if (r < 0) { log_error_errno(r, "Failed to create bus connection: %m"); goto finish; } if (arg_scope) r = start_transient_scope(bus, argv + optind); else if (with_timer()) r = start_transient_timer(bus, argv + optind); else r = start_transient_service(bus, argv + optind); finish: strv_free(arg_environment); strv_free(arg_property); strv_free(arg_timer_property); return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }