src/run/run.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2013 Lennart Poettering
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <getopt.h>
  21 #include <stdio.h>
  22
  23 #include "sd-bus.h"
  24 #include "sd-event.h"
  25
  26 #include "alloc-util.h"
  27 #include "bus-error.h"
  28 #include "bus-unit-util.h"
  29 #include "bus-util.h"
  30 #include "calendarspec.h"
  31 #include "env-util.h"
  32 #include "fd-util.h"
  33 #include "formats-util.h"
  34 #include "parse-util.h"
  35 #include "path-util.h"
  36 #include "ptyfwd.h"
  37 #include "signal-util.h"
  38 #include "spawn-polkit-agent.h"
  39 #include "strv.h"
  40 #include "terminal-util.h"
  41 #include "unit-name.h"
  42 #include "user-util.h"
  43
  44 static bool arg_ask_password = true;
  45 static bool arg_scope = false;
  46 static bool arg_remain_after_exit = false;
  47 static bool arg_no_block = false;
  48 static const char *arg_unit = NULL;
  49 static const char *arg_description = NULL;
  50 static const char *arg_slice = NULL;
  51 static bool arg_send_sighup = false;
  52 static BusTransport arg_transport = BUS_TRANSPORT_LOCAL;
  53 static const char *arg_host = NULL;
  54 static bool arg_user = false;
  55 static const char *arg_service_type = NULL;
  56 static const char *arg_exec_user = NULL;
  57 static const char *arg_exec_group = NULL;
  58 static int arg_nice = 0;
  59 static bool arg_nice_set = false;
  60 static char **arg_environment = NULL;
  61 static char **arg_property = NULL;
  62 static bool arg_pty = false;
  63 static usec_t arg_on_active = 0;
  64 static usec_t arg_on_boot = 0;
  65 static usec_t arg_on_startup = 0;
  66 static usec_t arg_on_unit_active = 0;
  67 static usec_t arg_on_unit_inactive = 0;
  68 static const char *arg_on_calendar = NULL;
  69 static char **arg_timer_property = NULL;
  70 static bool arg_quiet = false;
  71
  72 static void polkit_agent_open_if_enabled(void) {
  73
  74         /* Open the polkit agent as a child process if necessary */
  75         if (!arg_ask_password)
  76                 return;
  77
  78         if (arg_transport != BUS_TRANSPORT_LOCAL)
  79                 return;
  80
  81         polkit_agent_open();
  82 }
  83
  84 static void help(void) {
  85         printf("%s [OPTIONS...] {COMMAND} [ARGS...]\n\n"
  86                "Run the specified command in a transient scope or service.\n\n"
  87                "  -h --help                       Show this help\n"
  88                "     --version                    Show package version\n"
  89                "     --no-ask-password            Do not prompt for password\n"
  90                "     --user                       Run as user unit\n"
  91                "  -H --host=[USER@]HOST           Operate on remote host\n"
  92                "  -M --machine=CONTAINER          Operate on local container\n"
  93                "     --scope                      Run this as scope rather than service\n"
  94                "     --unit=UNIT                  Run under the specified unit name\n"
  95                "  -p --property=NAME=VALUE        Set service or scope unit property\n"
  96                "     --description=TEXT           Description for unit\n"
  97                "     --slice=SLICE                Run in the specified slice\n"
  98                "     --no-block                   Do not wait until operation finished\n"
  99                "  -r --remain-after-exit          Leave service around until explicitly stopped\n"
 100                "     --send-sighup                Send SIGHUP when terminating\n"
 101                "     --service-type=TYPE          Service type\n"
 102                "     --uid=USER                   Run as system user\n"
 103                "     --gid=GROUP                  Run as system group\n"
 104                "     --nice=NICE                  Nice level\n"
 105                "  -E --setenv=NAME=VALUE          Set environment\n"
 106                "  -t --pty                        Run service on pseudo tty\n"
 107                "  -q --quiet                      Suppress information messages during runtime\n\n"
 108                "Timer options:\n"
 109                "     --on-active=SECONDS          Run after SECONDS delay\n"
 110                "     --on-boot=SECONDS            Run SECONDS after machine was booted up\n"
 111                "     --on-startup=SECONDS         Run SECONDS after systemd activation\n"
 112                "     --on-unit-active=SECONDS     Run SECONDS after the last activation\n"
 113                "     --on-unit-inactive=SECONDS   Run SECONDS after the last deactivation\n"
 114                "     --on-calendar=SPEC           Realtime timer\n"
 115                "     --timer-property=NAME=VALUE  Set timer unit property\n"
 116                , program_invocation_short_name);
 117 }
 118
 119 static bool with_timer(void) {
 120         return arg_on_active || arg_on_boot || arg_on_startup || arg_on_unit_active || arg_on_unit_inactive || arg_on_calendar;
 121 }
 122
 123 static int parse_argv(int argc, char *argv[]) {
 124
 125         enum {
 126                 ARG_VERSION = 0x100,
 127                 ARG_USER,
 128                 ARG_SYSTEM,
 129                 ARG_SCOPE,
 130                 ARG_UNIT,
 131                 ARG_DESCRIPTION,
 132                 ARG_SLICE,
 133                 ARG_SEND_SIGHUP,
 134                 ARG_SERVICE_TYPE,
 135                 ARG_EXEC_USER,
 136                 ARG_EXEC_GROUP,
 137                 ARG_NICE,
 138                 ARG_ON_ACTIVE,
 139                 ARG_ON_BOOT,
 140                 ARG_ON_STARTUP,
 141                 ARG_ON_UNIT_ACTIVE,
 142                 ARG_ON_UNIT_INACTIVE,
 143                 ARG_ON_CALENDAR,
 144                 ARG_TIMER_PROPERTY,
 145                 ARG_NO_BLOCK,
 146                 ARG_NO_ASK_PASSWORD,
 147         };
 148
 149         static const struct option options[] = {
 150                 { "help",              no_argument,       NULL, 'h'                  },
 151                 { "version",           no_argument,       NULL, ARG_VERSION          },
 152                 { "user",              no_argument,       NULL, ARG_USER             },
 153                 { "system",            no_argument,       NULL, ARG_SYSTEM           },
 154                 { "scope",             no_argument,       NULL, ARG_SCOPE            },
 155                 { "unit",              required_argument, NULL, ARG_UNIT             },
 156                 { "description",       required_argument, NULL, ARG_DESCRIPTION      },
 157                 { "slice",             required_argument, NULL, ARG_SLICE            },
 158                 { "remain-after-exit", no_argument,       NULL, 'r'                  },
 159                 { "send-sighup",       no_argument,       NULL, ARG_SEND_SIGHUP      },
 160                 { "host",              required_argument, NULL, 'H'                  },
 161                 { "machine",           required_argument, NULL, 'M'                  },
 162                 { "service-type",      required_argument, NULL, ARG_SERVICE_TYPE     },
 163                 { "uid",               required_argument, NULL, ARG_EXEC_USER        },
 164                 { "gid",               required_argument, NULL, ARG_EXEC_GROUP       },
 165                 { "nice",              required_argument, NULL, ARG_NICE             },
 166                 { "setenv",            required_argument, NULL, 'E'                  },
 167                 { "property",          required_argument, NULL, 'p'                  },
 168                 { "tty",               no_argument,       NULL, 't'                  }, /* deprecated */
 169                 { "pty",               no_argument,       NULL, 't'                  },
 170                 { "quiet",             no_argument,       NULL, 'q'                  },
 171                 { "on-active",         required_argument, NULL, ARG_ON_ACTIVE        },
 172                 { "on-boot",           required_argument, NULL, ARG_ON_BOOT          },
 173                 { "on-startup",        required_argument, NULL, ARG_ON_STARTUP       },
 174                 { "on-unit-active",    required_argument, NULL, ARG_ON_UNIT_ACTIVE   },
 175                 { "on-unit-inactive",  required_argument, NULL, ARG_ON_UNIT_INACTIVE },
 176                 { "on-calendar",       required_argument, NULL, ARG_ON_CALENDAR      },
 177                 { "timer-property",    required_argument, NULL, ARG_TIMER_PROPERTY   },
 178                 { "no-block",          no_argument,       NULL, ARG_NO_BLOCK         },
 179                 { "no-ask-password",   no_argument,       NULL, ARG_NO_ASK_PASSWORD  },
 180                 {},
 181         };
 182
 183         int r, c;
 184
 185         assert(argc >= 0);
 186         assert(argv);
 187
 188         while ((c = getopt_long(argc, argv, "+hrH:M:E:p:tq", options, NULL)) >= 0)
 189
 190                 switch (c) {
 191
 192                 case 'h':
 193                         help();
 194                         return 0;
 195
 196                 case ARG_VERSION:
 197                         return version();
 198
 199                 case ARG_NO_ASK_PASSWORD:
 200                         arg_ask_password = false;
 201                         break;
 202
 203                 case ARG_USER:
 204                         arg_user = true;
 205                         break;
 206
 207                 case ARG_SYSTEM:
 208                         arg_user = false;
 209                         break;
 210
 211                 case ARG_SCOPE:
 212                         arg_scope = true;
 213                         break;
 214
 215                 case ARG_UNIT:
 216                         arg_unit = optarg;
 217                         break;
 218
 219                 case ARG_DESCRIPTION:
 220                         arg_description = optarg;
 221                         break;
 222
 223                 case ARG_SLICE:
 224                         arg_slice = optarg;
 225                         break;
 226
 227                 case ARG_SEND_SIGHUP:
 228                         arg_send_sighup = true;
 229                         break;
 230
 231                 case 'r':
 232                         arg_remain_after_exit = true;
 233                         break;
 234
 235                 case 'H':
 236                         arg_transport = BUS_TRANSPORT_REMOTE;
 237                         arg_host = optarg;
 238                         break;
 239
 240                 case 'M':
 241                         arg_transport = BUS_TRANSPORT_MACHINE;
 242                         arg_host = optarg;
 243                         break;
 244
 245                 case ARG_SERVICE_TYPE:
 246                         arg_service_type = optarg;
 247                         break;
 248
 249                 case ARG_EXEC_USER:
 250                         arg_exec_user = optarg;
 251                         break;
 252
 253                 case ARG_EXEC_GROUP:
 254                         arg_exec_group = optarg;
 255                         break;
 256
 257                 case ARG_NICE:
 258                         r = parse_nice(optarg, &arg_nice);
 259                         if (r < 0)
 260                                 return log_error_errno(r, "Failed to parse nice value: %s", optarg);
 261
 262                         arg_nice_set = true;
 263                         break;
 264
 265                 case 'E':
 266                         if (strv_extend(&arg_environment, optarg) < 0)
 267                                 return log_oom();
 268
 269                         break;
 270
 271                 case 'p':
 272                         if (strv_extend(&arg_property, optarg) < 0)
 273                                 return log_oom();
 274
 275                         break;
 276
 277                 case 't':
 278                         arg_pty = true;
 279                         break;
 280
 281                 case 'q':
 282                         arg_quiet = true;
 283                         break;
 284
 285                 case ARG_ON_ACTIVE:
 286
 287                         r = parse_sec(optarg, &arg_on_active);
 288                         if (r < 0) {
 289                                 log_error("Failed to parse timer value: %s", optarg);
 290                                 return r;
 291                         }
 292
 293                         break;
 294
 295                 case ARG_ON_BOOT:
 296
 297                         r = parse_sec(optarg, &arg_on_boot);
 298                         if (r < 0) {
 299                                 log_error("Failed to parse timer value: %s", optarg);
 300                                 return r;
 301                         }
 302
 303                         break;
 304
 305                 case ARG_ON_STARTUP:
 306
 307                         r = parse_sec(optarg, &arg_on_startup);
 308                         if (r < 0) {
 309                                 log_error("Failed to parse timer value: %s", optarg);
 310                                 return r;
 311                         }
 312
 313                         break;
 314
 315                 case ARG_ON_UNIT_ACTIVE:
 316
 317                         r = parse_sec(optarg, &arg_on_unit_active);
 318                         if (r < 0) {
 319                                 log_error("Failed to parse timer value: %s", optarg);
 320                                 return r;
 321                         }
 322
 323                         break;
 324
 325                 case ARG_ON_UNIT_INACTIVE:
 326
 327                         r = parse_sec(optarg, &arg_on_unit_inactive);
 328                         if (r < 0) {
 329                                 log_error("Failed to parse timer value: %s", optarg);
 330                                 return r;
 331                         }
 332
 333                         break;
 334
 335                 case ARG_ON_CALENDAR: {
 336                         CalendarSpec *spec = NULL;
 337
 338                         r = calendar_spec_from_string(optarg, &spec);
 339                         if (r < 0) {
 340                                 log_error("Invalid calendar spec: %s", optarg);
 341                                 return r;
 342                         }
 343
 344                         calendar_spec_free(spec);
 345                         arg_on_calendar = optarg;
 346                         break;
 347                 }
 348
 349                 case ARG_TIMER_PROPERTY:
 350
 351                         if (strv_extend(&arg_timer_property, optarg) < 0)
 352                                 return log_oom();
 353
 354                         break;
 355
 356                 case ARG_NO_BLOCK:
 357                         arg_no_block = true;
 358                         break;
 359
 360                 case '?':
 361                         return -EINVAL;
 362
 363                 default:
 364                         assert_not_reached("Unhandled option");
 365                 }
 366
 367         if ((optind >= argc) && (!arg_unit || !with_timer())) {
 368                 log_error("Command line to execute required.");
 369                 return -EINVAL;
 370         }
 371
 372         if (arg_user && arg_transport != BUS_TRANSPORT_LOCAL) {
 373                 log_error("Execution in user context is not supported on non-local systems.");
 374                 return -EINVAL;
 375         }
 376
 377         if (arg_scope && arg_transport != BUS_TRANSPORT_LOCAL) {
 378                 log_error("Scope execution is not supported on non-local systems.");
 379                 return -EINVAL;
 380         }
 381
 382         if (arg_scope && (arg_remain_after_exit || arg_service_type)) {
 383                 log_error("--remain-after-exit and --service-type= are not supported in --scope mode.");
 384                 return -EINVAL;
 385         }
 386
 387         if (arg_pty && (with_timer() || arg_scope)) {
 388                 log_error("--pty is not compatible in timer or --scope mode.");
 389                 return -EINVAL;
 390         }
 391
 392         if (arg_pty && arg_transport == BUS_TRANSPORT_REMOTE) {
 393                 log_error("--pty is only supported when connecting to the local system or containers.");
 394                 return -EINVAL;
 395         }
 396
 397         if (arg_scope && with_timer()) {
 398                 log_error("Timer options are not supported in --scope mode.");
 399                 return -EINVAL;
 400         }
 401
 402         if (arg_timer_property && !with_timer()) {
 403                 log_error("--timer-property= has no effect without any other timer options.");
 404                 return -EINVAL;
 405         }
 406
 407         return 1;
 408 }
 409
 410 static int transient_unit_set_properties(sd_bus_message *m, char **properties) {
 411         int r;
 412
 413         r = sd_bus_message_append(m, "(sv)", "Description", "s", arg_description);
 414         if (r < 0)
 415                 return r;
 416
 417         r = bus_append_unit_property_assignment_many(m, properties);
 418         if (r < 0)
 419                 return r;
 420
 421         return 0;
 422 }
 423
 424 static int transient_cgroup_set_properties(sd_bus_message *m) {
 425         int r;
 426         assert(m);
 427
 428         if (!isempty(arg_slice)) {
 429                 _cleanup_free_ char *slice;
 430
 431                 r = unit_name_mangle_with_suffix(arg_slice, UNIT_NAME_NOGLOB, ".slice", &slice);
 432                 if (r < 0)
 433                         return r;
 434
 435                 r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
 436                 if (r < 0)
 437                         return r;
 438         }
 439
 440         return 0;
 441 }
 442
 443 static int transient_kill_set_properties(sd_bus_message *m) {
 444         assert(m);
 445
 446         if (arg_send_sighup)
 447                 return sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", arg_send_sighup);
 448         else
 449                 return 0;
 450 }
 451
 452 static int transient_service_set_properties(sd_bus_message *m, char **argv, const char *pty_path) {
 453         int r;
 454
 455         assert(m);
 456
 457         r = transient_unit_set_properties(m, arg_property);
 458         if (r < 0)
 459                 return r;
 460
 461         r = transient_kill_set_properties(m);
 462         if (r < 0)
 463                 return r;
 464
 465         r = transient_cgroup_set_properties(m);
 466         if (r < 0)
 467                 return r;
 468
 469         if (arg_remain_after_exit) {
 470                 r = sd_bus_message_append(m, "(sv)", "RemainAfterExit", "b", arg_remain_after_exit);
 471                 if (r < 0)
 472                         return r;
 473         }
 474
 475         if (arg_service_type) {
 476                 r = sd_bus_message_append(m, "(sv)", "Type", "s", arg_service_type);
 477                 if (r < 0)
 478                         return r;
 479         }
 480
 481         if (arg_exec_user) {
 482                 r = sd_bus_message_append(m, "(sv)", "User", "s", arg_exec_user);
 483                 if (r < 0)
 484                         return r;
 485         }
 486
 487         if (arg_exec_group) {
 488                 r = sd_bus_message_append(m, "(sv)", "Group", "s", arg_exec_group);
 489                 if (r < 0)
 490                         return r;
 491         }
 492
 493         if (arg_nice_set) {
 494                 r = sd_bus_message_append(m, "(sv)", "Nice", "i", arg_nice);
 495                 if (r < 0)
 496                         return r;
 497         }
 498
 499         if (pty_path) {
 500                 const char *e;
 501
 502                 r = sd_bus_message_append(m,
 503                                           "(sv)(sv)(sv)(sv)",
 504                                           "StandardInput", "s", "tty",
 505                                           "StandardOutput", "s", "tty",
 506                                           "StandardError", "s", "tty",
 507                                           "TTYPath", "s", pty_path);
 508                 if (r < 0)
 509                         return r;
 510
 511                 e = getenv("TERM");
 512                 if (e) {
 513                         char *n;
 514
 515                         n = strjoina("TERM=", e);
 516                         r = sd_bus_message_append(m,
 517                                                   "(sv)",
 518                                                   "Environment", "as", 1, n);
 519                         if (r < 0)
 520                                 return r;
 521                 }
 522         }
 523
 524         if (!strv_isempty(arg_environment)) {
 525                 r = sd_bus_message_open_container(m, 'r', "sv");
 526                 if (r < 0)
 527                         return r;
 528
 529                 r = sd_bus_message_append(m, "s", "Environment");
 530                 if (r < 0)
 531                         return r;
 532
 533                 r = sd_bus_message_open_container(m, 'v', "as");
 534                 if (r < 0)
 535                         return r;
 536
 537                 r = sd_bus_message_append_strv(m, arg_environment);
 538                 if (r < 0)
 539                         return r;
 540
 541                 r = sd_bus_message_close_container(m);
 542                 if (r < 0)
 543                         return r;
 544
 545                 r = sd_bus_message_close_container(m);
 546                 if (r < 0)
 547                         return r;
 548         }
 549
 550         /* Exec container */
 551         {
 552                 r = sd_bus_message_open_container(m, 'r', "sv");
 553                 if (r < 0)
 554                         return r;
 555
 556                 r = sd_bus_message_append(m, "s", "ExecStart");
 557                 if (r < 0)
 558                         return r;
 559
 560                 r = sd_bus_message_open_container(m, 'v', "a(sasb)");
 561                 if (r < 0)
 562                         return r;
 563
 564                 r = sd_bus_message_open_container(m, 'a', "(sasb)");
 565                 if (r < 0)
 566                         return r;
 567
 568                 r = sd_bus_message_open_container(m, 'r', "sasb");
 569                 if (r < 0)
 570                         return r;
 571
 572                 r = sd_bus_message_append(m, "s", argv[0]);
 573                 if (r < 0)
 574                         return r;
 575
 576                 r = sd_bus_message_append_strv(m, argv);
 577                 if (r < 0)
 578                         return r;
 579
 580                 r = sd_bus_message_append(m, "b", false);
 581                 if (r < 0)
 582                         return r;
 583
 584                 r = sd_bus_message_close_container(m);
 585                 if (r < 0)
 586                         return r;
 587
 588                 r = sd_bus_message_close_container(m);
 589                 if (r < 0)
 590                         return r;
 591
 592                 r = sd_bus_message_close_container(m);
 593                 if (r < 0)
 594                         return r;
 595
 596                 r = sd_bus_message_close_container(m);
 597                 if (r < 0)
 598                         return r;
 599         }
 600
 601         return 0;
 602 }
 603
 604 static int transient_scope_set_properties(sd_bus_message *m) {
 605         int r;
 606
 607         assert(m);
 608
 609         r = transient_unit_set_properties(m, arg_property);
 610         if (r < 0)
 611                 return r;
 612
 613         r = transient_kill_set_properties(m);
 614         if (r < 0)
 615                 return r;
 616
 617         r = transient_cgroup_set_properties(m);
 618         if (r < 0)
 619                 return r;
 620
 621         r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, (uint32_t) getpid());
 622         if (r < 0)
 623                 return r;
 624
 625         return 0;
 626 }
 627
 628 static int transient_timer_set_properties(sd_bus_message *m) {
 629         int r;
 630
 631         assert(m);
 632
 633         r = transient_unit_set_properties(m, arg_timer_property);
 634         if (r < 0)
 635                 return r;
 636
 637         /* Automatically clean up our transient timers */
 638         r = sd_bus_message_append(m, "(sv)", "RemainAfterElapse", "b", false);
 639         if (r < 0)
 640                 return r;
 641
 642         if (arg_on_active) {
 643                 r = sd_bus_message_append(m, "(sv)", "OnActiveSec", "t", arg_on_active);
 644                 if (r < 0)
 645                         return r;
 646         }
 647
 648         if (arg_on_boot) {
 649                 r = sd_bus_message_append(m, "(sv)", "OnBootSec", "t", arg_on_boot);
 650                 if (r < 0)
 651                         return r;
 652         }
 653
 654         if (arg_on_startup) {
 655                 r = sd_bus_message_append(m, "(sv)", "OnStartupSec", "t", arg_on_startup);
 656                 if (r < 0)
 657                         return r;
 658         }
 659
 660         if (arg_on_unit_active) {
 661                 r = sd_bus_message_append(m, "(sv)", "OnUnitActiveSec", "t", arg_on_unit_active);
 662                 if (r < 0)
 663                         return r;
 664         }
 665
 666         if (arg_on_unit_inactive) {
 667                 r = sd_bus_message_append(m, "(sv)", "OnUnitInactiveSec", "t", arg_on_unit_inactive);
 668                 if (r < 0)
 669                         return r;
 670         }
 671
 672         if (arg_on_calendar) {
 673                 r = sd_bus_message_append(m, "(sv)", "OnCalendar", "s", arg_on_calendar);
 674                 if (r < 0)
 675                         return r;
 676         }
 677
 678         return 0;
 679 }
 680
 681 static int make_unit_name(sd_bus *bus, UnitType t, char **ret) {
 682         const char *unique, *id;
 683         char *p;
 684         int r;
 685
 686         assert(bus);
 687         assert(t >= 0);
 688         assert(t < _UNIT_TYPE_MAX);
 689
 690         r = sd_bus_get_unique_name(bus, &unique);
 691         if (r < 0) {
 692                 sd_id128_t rnd;
 693
 694                 /* We couldn't get the unique name, which is a pretty
 695                  * common case if we are connected to systemd
 696                  * directly. In that case, just pick a random uuid as
 697                  * name */
 698
 699                 r = sd_id128_randomize(&rnd);
 700                 if (r < 0)
 701                         return log_error_errno(r, "Failed to generate random run unit name: %m");
 702
 703                 if (asprintf(ret, "run-r" SD_ID128_FORMAT_STR ".%s", SD_ID128_FORMAT_VAL(rnd), unit_type_to_string(t)) < 0)
 704                         return log_oom();
 705
 706                 return 0;
 707         }
 708
 709         /* We managed to get the unique name, then let's use that to
 710          * name our transient units. */
 711
 712         id = startswith(unique, ":1.");
 713         if (!id) {
 714                 log_error("Unique name %s has unexpected format.", unique);
 715                 return -EINVAL;
 716         }
 717
 718         p = strjoin("run-u", id, ".", unit_type_to_string(t), NULL);
 719         if (!p)
 720                 return log_oom();
 721
 722         *ret = p;
 723         return 0;
 724 }
 725
 726 static int start_transient_service(
 727                 sd_bus *bus,
 728                 char **argv) {
 729
 730         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
 731         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
 732         _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL;
 733         _cleanup_free_ char *service = NULL, *pty_path = NULL;
 734         _cleanup_close_ int master = -1;
 735         int r;
 736
 737         assert(bus);
 738         assert(argv);
 739
 740         if (arg_pty) {
 741
 742                 if (arg_transport == BUS_TRANSPORT_LOCAL) {
 743                         master = posix_openpt(O_RDWR|O_NOCTTY|O_CLOEXEC|O_NDELAY);
 744                         if (master < 0)
 745                                 return log_error_errno(errno, "Failed to acquire pseudo tty: %m");
 746
 747                         r = ptsname_malloc(master, &pty_path);
 748                         if (r < 0)
 749                                 return log_error_errno(r, "Failed to determine tty name: %m");
 750
 751                         if (unlockpt(master) < 0)
 752                                 return log_error_errno(errno, "Failed to unlock tty: %m");
 753
 754                 } else if (arg_transport == BUS_TRANSPORT_MACHINE) {
 755                         _cleanup_(sd_bus_unrefp) sd_bus *system_bus = NULL;
 756                         _cleanup_(sd_bus_message_unrefp) sd_bus_message *pty_reply = NULL;
 757                         const char *s;
 758
 759                         r = sd_bus_default_system(&system_bus);
 760                         if (r < 0)
 761                                 return log_error_errno(r, "Failed to connect to system bus: %m");
 762
 763                         r = sd_bus_call_method(system_bus,
 764                                                "org.freedesktop.machine1",
 765                                                "/org/freedesktop/machine1",
 766                                                "org.freedesktop.machine1.Manager",
 767                                                "OpenMachinePTY",
 768                                                &error,
 769                                                &pty_reply,
 770                                                "s", arg_host);
 771                         if (r < 0) {
 772                                 log_error("Failed to get machine PTY: %s", bus_error_message(&error, -r));
 773                                 return r;
 774                         }
 775
 776                         r = sd_bus_message_read(pty_reply, "hs", &master, &s);
 777                         if (r < 0)
 778                                 return bus_log_parse_error(r);
 779
 780                         master = fcntl(master, F_DUPFD_CLOEXEC, 3);
 781                         if (master < 0)
 782                                 return log_error_errno(errno, "Failed to duplicate master fd: %m");
 783
 784                         pty_path = strdup(s);
 785                         if (!pty_path)
 786                                 return log_oom();
 787                 } else
 788                         assert_not_reached("Can't allocate tty via ssh");
 789         }
 790
 791         if (!arg_no_block) {
 792                 r = bus_wait_for_jobs_new(bus, &w);
 793                 if (r < 0)
 794                         return log_error_errno(r, "Could not watch jobs: %m");
 795         }
 796
 797         if (arg_unit) {
 798                 r = unit_name_mangle_with_suffix(arg_unit, UNIT_NAME_NOGLOB, ".service", &service);
 799                 if (r < 0)
 800                         return log_error_errno(r, "Failed to mangle unit name: %m");
 801         } else {
 802                 r = make_unit_name(bus, UNIT_SERVICE, &service);
 803                 if (r < 0)
 804                         return r;
 805         }
 806
 807         r = sd_bus_message_new_method_call(
 808                         bus,
 809                         &m,
 810                         "org.freedesktop.systemd1",
 811                         "/org/freedesktop/systemd1",
 812                         "org.freedesktop.systemd1.Manager",
 813                         "StartTransientUnit");
 814         if (r < 0)
 815                 return bus_log_create_error(r);
 816
 817         r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
 818         if (r < 0)
 819                 return bus_log_create_error(r);
 820
 821         /* Name and mode */
 822         r = sd_bus_message_append(m, "ss", service, "fail");
 823         if (r < 0)
 824                 return bus_log_create_error(r);
 825
 826         /* Properties */
 827         r = sd_bus_message_open_container(m, 'a', "(sv)");
 828         if (r < 0)
 829                 return bus_log_create_error(r);
 830
 831         r = transient_service_set_properties(m, argv, pty_path);
 832         if (r < 0)
 833                 return bus_log_create_error(r);
 834
 835         r = sd_bus_message_close_container(m);
 836         if (r < 0)
 837                 return bus_log_create_error(r);
 838
 839         /* Auxiliary units */
 840         r = sd_bus_message_append(m, "a(sa(sv))", 0);
 841         if (r < 0)
 842                 return bus_log_create_error(r);
 843
 844         polkit_agent_open_if_enabled();
 845
 846         r = sd_bus_call(bus, m, 0, &error, &reply);
 847         if (r < 0)
 848                 return log_error_errno(r, "Failed to start transient service unit: %s", bus_error_message(&error, r));
 849
 850         if (w) {
 851                 const char *object;
 852
 853                 r = sd_bus_message_read(reply, "o", &object);
 854                 if (r < 0)
 855                         return bus_log_parse_error(r);
 856
 857                 r = bus_wait_for_jobs_one(w, object, arg_quiet);
 858                 if (r < 0)
 859                         return r;
 860         }
 861
 862         if (master >= 0) {
 863                 _cleanup_(pty_forward_freep) PTYForward *forward = NULL;
 864                 _cleanup_(sd_event_unrefp) sd_event *event = NULL;
 865                 char last_char = 0;
 866
 867                 r = sd_event_default(&event);
 868                 if (r < 0)
 869                         return log_error_errno(r, "Failed to get event loop: %m");
 870
 871                 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGWINCH, SIGTERM, SIGINT, -1) >= 0);
 872
 873                 (void) sd_event_add_signal(event, NULL, SIGINT, NULL, NULL);
 874                 (void) sd_event_add_signal(event, NULL, SIGTERM, NULL, NULL);
 875
 876                 if (!arg_quiet)
 877                         log_info("Running as unit: %s\nPress ^] three times within 1s to disconnect TTY.", service);
 878
 879                 r = pty_forward_new(event, master, PTY_FORWARD_IGNORE_INITIAL_VHANGUP, &forward);
 880                 if (r < 0)
 881                         return log_error_errno(r, "Failed to create PTY forwarder: %m");
 882
 883                 r = sd_event_loop(event);
 884                 if (r < 0)
 885                         return log_error_errno(r, "Failed to run event loop: %m");
 886
 887                 pty_forward_get_last_char(forward, &last_char);
 888
 889                 forward = pty_forward_free(forward);
 890
 891                 if (!arg_quiet && last_char != '\n')
 892                         fputc('\n', stdout);
 893
 894         } else if (!arg_quiet)
 895                 log_info("Running as unit: %s", service);
 896
 897         return 0;
 898 }
 899
 900 static int start_transient_scope(
 901                 sd_bus *bus,
 902                 char **argv) {
 903
 904         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
 905         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
 906         _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL;
 907         _cleanup_strv_free_ char **env = NULL, **user_env = NULL;
 908         _cleanup_free_ char *scope = NULL;
 909         const char *object = NULL;
 910         int r;
 911
 912         assert(bus);
 913         assert(argv);
 914
 915         r = bus_wait_for_jobs_new(bus, &w);
 916         if (r < 0)
 917                 return log_oom();
 918
 919         if (arg_unit) {
 920                 r = unit_name_mangle_with_suffix(arg_unit, UNIT_NAME_NOGLOB, ".scope", &scope);
 921                 if (r < 0)
 922                         return log_error_errno(r, "Failed to mangle scope name: %m");
 923         } else {
 924                 r = make_unit_name(bus, UNIT_SCOPE, &scope);
 925                 if (r < 0)
 926                         return r;
 927         }
 928
 929         r = sd_bus_message_new_method_call(
 930                         bus,
 931                         &m,
 932                         "org.freedesktop.systemd1",
 933                         "/org/freedesktop/systemd1",
 934                         "org.freedesktop.systemd1.Manager",
 935                         "StartTransientUnit");
 936         if (r < 0)
 937                 return bus_log_create_error(r);
 938
 939         r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
 940         if (r < 0)
 941                 return bus_log_create_error(r);
 942
 943         /* Name and Mode */
 944         r = sd_bus_message_append(m, "ss", scope, "fail");
 945         if (r < 0)
 946                 return bus_log_create_error(r);
 947
 948         /* Properties */
 949         r = sd_bus_message_open_container(m, 'a', "(sv)");
 950         if (r < 0)
 951                 return bus_log_create_error(r);
 952
 953         r = transient_scope_set_properties(m);
 954         if (r < 0)
 955                 return bus_log_create_error(r);
 956
 957         r = sd_bus_message_close_container(m);
 958         if (r < 0)
 959                 return bus_log_create_error(r);
 960
 961         /* Auxiliary units */
 962         r = sd_bus_message_append(m, "a(sa(sv))", 0);
 963         if (r < 0)
 964                 return bus_log_create_error(r);
 965
 966         polkit_agent_open_if_enabled();
 967
 968         r = sd_bus_call(bus, m, 0, &error, &reply);
 969         if (r < 0) {
 970                 log_error("Failed to start transient scope unit: %s", bus_error_message(&error, -r));
 971                 return r;
 972         }
 973
 974         if (arg_nice_set) {
 975                 if (setpriority(PRIO_PROCESS, 0, arg_nice) < 0)
 976                         return log_error_errno(errno, "Failed to set nice level: %m");
 977         }
 978
 979         if (arg_exec_group) {
 980                 gid_t gid;
 981
 982                 r = get_group_creds(&arg_exec_group, &gid);
 983                 if (r < 0)
 984                         return log_error_errno(r, "Failed to resolve group %s: %m", arg_exec_group);
 985
 986                 if (setresgid(gid, gid, gid) < 0)
 987                         return log_error_errno(errno, "Failed to change GID to " GID_FMT ": %m", gid);
 988         }
 989
 990         if (arg_exec_user) {
 991                 const char *home, *shell;
 992                 uid_t uid;
 993                 gid_t gid;
 994
 995                 r = get_user_creds(&arg_exec_user, &uid, &gid, &home, &shell);
 996                 if (r < 0)
 997                         return log_error_errno(r, "Failed to resolve user %s: %m", arg_exec_user);
 998
 999                 r = strv_extendf(&user_env, "HOME=%s", home);
1000                 if (r < 0)
1001                         return log_oom();
1002
1003                 r = strv_extendf(&user_env, "SHELL=%s", shell);
1004                 if (r < 0)
1005                         return log_oom();
1006
1007                 r = strv_extendf(&user_env, "USER=%s", arg_exec_user);
1008                 if (r < 0)
1009                         return log_oom();
1010
1011                 r = strv_extendf(&user_env, "LOGNAME=%s", arg_exec_user);
1012                 if (r < 0)
1013                         return log_oom();
1014
1015                 if (!arg_exec_group) {
1016                         if (setresgid(gid, gid, gid) < 0)
1017                                 return log_error_errno(errno, "Failed to change GID to " GID_FMT ": %m", gid);
1018                 }
1019
1020                 if (setresuid(uid, uid, uid) < 0)
1021                         return log_error_errno(errno, "Failed to change UID to " UID_FMT ": %m", uid);
1022         }
1023
1024         env = strv_env_merge(3, environ, user_env, arg_environment);
1025         if (!env)
1026                 return log_oom();
1027
1028         r = sd_bus_message_read(reply, "o", &object);
1029         if (r < 0)
1030                 return bus_log_parse_error(r);
1031
1032         r = bus_wait_for_jobs_one(w, object, arg_quiet);
1033         if (r < 0)
1034                 return r;
1035
1036         if (!arg_quiet)
1037                 log_info("Running scope as unit: %s", scope);
1038
1039         execvpe(argv[0], argv, env);
1040
1041         return log_error_errno(errno, "Failed to execute: %m");
1042 }
1043
1044 static int start_transient_timer(
1045                 sd_bus *bus,
1046                 char **argv) {
1047
1048         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1049         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
1050         _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL;
1051         _cleanup_free_ char *timer = NULL, *service = NULL;
1052         const char *object = NULL;
1053         int r;
1054
1055         assert(bus);
1056         assert(argv);
1057
1058         r = bus_wait_for_jobs_new(bus, &w);
1059         if (r < 0)
1060                 return log_oom();
1061
1062         if (arg_unit) {
1063                 switch (unit_name_to_type(arg_unit)) {
1064
1065                 case UNIT_SERVICE:
1066                         service = strdup(arg_unit);
1067                         if (!service)
1068                                 return log_oom();
1069
1070                         r = unit_name_change_suffix(service, ".timer", &timer);
1071                         if (r < 0)
1072                                 return log_error_errno(r, "Failed to change unit suffix: %m");
1073                         break;
1074
1075                 case UNIT_TIMER:
1076                         timer = strdup(arg_unit);
1077                         if (!timer)
1078                                 return log_oom();
1079
1080                         r = unit_name_change_suffix(timer, ".service", &service);
1081                         if (r < 0)
1082                                 return log_error_errno(r, "Failed to change unit suffix: %m");
1083                         break;
1084
1085                 default:
1086                         r = unit_name_mangle_with_suffix(arg_unit, UNIT_NAME_NOGLOB, ".service", &service);
1087                         if (r < 0)
1088                                 return log_error_errno(r, "Failed to mangle unit name: %m");
1089
1090                         r = unit_name_mangle_with_suffix(arg_unit, UNIT_NAME_NOGLOB, ".timer", &timer);
1091                         if (r < 0)
1092                                 return log_error_errno(r, "Failed to mangle unit name: %m");
1093
1094                         break;
1095                 }
1096         } else {
1097                 r = make_unit_name(bus, UNIT_SERVICE, &service);
1098                 if (r < 0)
1099                         return r;
1100
1101                 r = unit_name_change_suffix(service, ".timer", &timer);
1102                 if (r < 0)
1103                         return log_error_errno(r, "Failed to change unit suffix: %m");
1104         }
1105
1106         r = sd_bus_message_new_method_call(
1107                         bus,
1108                         &m,
1109                         "org.freedesktop.systemd1",
1110                         "/org/freedesktop/systemd1",
1111                         "org.freedesktop.systemd1.Manager",
1112                         "StartTransientUnit");
1113         if (r < 0)
1114                 return bus_log_create_error(r);
1115
1116         r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
1117         if (r < 0)
1118                 return bus_log_create_error(r);
1119
1120         /* Name and Mode */
1121         r = sd_bus_message_append(m, "ss", timer, "fail");
1122         if (r < 0)
1123                 return bus_log_create_error(r);
1124
1125         /* Properties */
1126         r = sd_bus_message_open_container(m, 'a', "(sv)");
1127         if (r < 0)
1128                 return bus_log_create_error(r);
1129
1130         r = transient_timer_set_properties(m);
1131         if (r < 0)
1132                 return bus_log_create_error(r);
1133
1134         r = sd_bus_message_close_container(m);
1135         if (r < 0)
1136                 return bus_log_create_error(r);
1137
1138         r = sd_bus_message_open_container(m, 'a', "(sa(sv))");
1139         if (r < 0)
1140                 return bus_log_create_error(r);
1141
1142         if (!strv_isempty(argv)) {
1143                 r = sd_bus_message_open_container(m, 'r', "sa(sv)");
1144                 if (r < 0)
1145                         return bus_log_create_error(r);
1146
1147                 r = sd_bus_message_append(m, "s", service);
1148                 if (r < 0)
1149                         return bus_log_create_error(r);
1150
1151                 r = sd_bus_message_open_container(m, 'a', "(sv)");
1152                 if (r < 0)
1153                         return bus_log_create_error(r);
1154
1155                 r = transient_service_set_properties(m, argv, NULL);
1156                 if (r < 0)
1157                         return bus_log_create_error(r);
1158
1159                 r = sd_bus_message_close_container(m);
1160                 if (r < 0)
1161                         return bus_log_create_error(r);
1162
1163                 r = sd_bus_message_close_container(m);
1164                 if (r < 0)
1165                         return bus_log_create_error(r);
1166         }
1167
1168         r = sd_bus_message_close_container(m);
1169         if (r < 0)
1170                 return bus_log_create_error(r);
1171
1172         polkit_agent_open_if_enabled();
1173
1174         r = sd_bus_call(bus, m, 0, &error, &reply);
1175         if (r < 0) {
1176                 log_error("Failed to start transient timer unit: %s", bus_error_message(&error, -r));
1177                 return r;
1178         }
1179
1180         r = sd_bus_message_read(reply, "o", &object);
1181         if (r < 0)
1182                 return bus_log_parse_error(r);
1183
1184         r = bus_wait_for_jobs_one(w, object, arg_quiet);
1185         if (r < 0)
1186                 return r;
1187
1188         log_info("Running timer as unit: %s", timer);
1189         if (argv[0])
1190                 log_info("Will run service as unit: %s", service);
1191
1192         return 0;
1193 }
1194
1195 int main(int argc, char* argv[]) {
1196         _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
1197         _cleanup_free_ char *description = NULL, *command = NULL;
1198         int r;
1199
1200         log_parse_environment();
1201         log_open();
1202
1203         r = parse_argv(argc, argv);
1204         if (r <= 0)
1205                 goto finish;
1206
1207         if (argc > optind && arg_transport == BUS_TRANSPORT_LOCAL) {
1208                 /* Patch in an absolute path */
1209
1210                 r = find_binary(argv[optind], &command);
1211                 if (r < 0) {
1212                         log_error_errno(r, "Failed to find executable %s: %m", argv[optind]);
1213                         goto finish;
1214                 }
1215
1216                 argv[optind] = command;
1217         }
1218
1219         if (!arg_description) {
1220                 description = strv_join(argv + optind, " ");
1221                 if (!description) {
1222                         r = log_oom();
1223                         goto finish;
1224                 }
1225
1226                 if (arg_unit && isempty(description)) {
1227                         r = free_and_strdup(&description, arg_unit);
1228                         if (r < 0)
1229                                 goto finish;
1230                 }
1231
1232                 arg_description = description;
1233         }
1234
1235         r = bus_connect_transport_systemd(arg_transport, arg_host, arg_user, &bus);
1236         if (r < 0) {
1237                 log_error_errno(r, "Failed to create bus connection: %m");
1238                 goto finish;
1239         }
1240
1241         if (arg_scope)
1242                 r = start_transient_scope(bus, argv + optind);
1243         else if (with_timer())
1244                 r = start_transient_timer(bus, argv + optind);
1245         else
1246                 r = start_transient_service(bus, argv + optind);
1247
1248 finish:
1249         strv_free(arg_environment);
1250         strv_free(arg_property);
1251         strv_free(arg_timer_property);
1252
1253         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
1254 }