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-util.h"
  29 #include "calendarspec.h"
  30 #include "env-util.h"
  31 #include "fd-util.h"
  32 #include "formats-util.h"
  33 #include "parse-util.h"
  34 #include "path-util.h"
  35 #include "ptyfwd.h"
  36 #include "signal-util.h"
  37 #include "spawn-polkit-agent.h"
  38 #include "strv.h"
  39 #include "terminal-util.h"
  40 #include "unit-name.h"
  41 #include "user-util.h"
  42
  43 static bool arg_ask_password = true;
  44 static bool arg_scope = false;
  45 static bool arg_remain_after_exit = false;
  46 static bool arg_no_block = false;
  47 static const char *arg_unit = NULL;
  48 static const char *arg_description = NULL;
  49 static const char *arg_slice = NULL;
  50 static bool arg_send_sighup = false;
  51 static BusTransport arg_transport = BUS_TRANSPORT_LOCAL;
  52 static const char *arg_host = NULL;
  53 static bool arg_user = false;
  54 static const char *arg_service_type = NULL;
  55 static const char *arg_exec_user = NULL;
  56 static const char *arg_exec_group = NULL;
  57 static int arg_nice = 0;
  58 static bool arg_nice_set = false;
  59 static char **arg_environment = NULL;
  60 static char **arg_property = NULL;
  61 static bool arg_pty = false;
  62 static usec_t arg_on_active = 0;
  63 static usec_t arg_on_boot = 0;
  64 static usec_t arg_on_startup = 0;
  65 static usec_t arg_on_unit_active = 0;
  66 static usec_t arg_on_unit_inactive = 0;
  67 static const char *arg_on_calendar = NULL;
  68 static char **arg_timer_property = NULL;
  69 static bool arg_quiet = false;
  70
  71 static void polkit_agent_open_if_enabled(void) {
  72
  73         /* Open the polkit agent as a child process if necessary */
  74         if (!arg_ask_password)
  75                 return;
  76
  77         if (arg_transport != BUS_TRANSPORT_LOCAL)
  78                 return;
  79
  80         polkit_agent_open();
  81 }
  82
  83 static void help(void) {
  84         printf("%s [OPTIONS...] {COMMAND} [ARGS...]\n\n"
  85                "Run the specified command in a transient scope or service or timer\n"
  86                "unit. If timer option is specified and unit is exist which is\n"
  87                "specified with --unit option then command can be omitted.\n\n"
  88                "  -h --help                       Show this help\n"
  89                "     --version                    Show package version\n"
  90                "     --no-ask-password            Do not prompt for password\n"
  91                "     --user                       Run as user unit\n"
  92                "  -H --host=[USER@]HOST           Operate on remote host\n"
  93                "  -M --machine=CONTAINER          Operate on local container\n"
  94                "     --scope                      Run this as scope rather than service\n"
  95                "     --unit=UNIT                  Run under the specified unit name\n"
  96                "  -p --property=NAME=VALUE        Set unit property\n"
  97                "     --description=TEXT           Description for unit\n"
  98                "     --slice=SLICE                Run in the specified slice\n"
  99                "     --no-block                   Do not wait until operation finished\n"
 100                "  -r --remain-after-exit          Leave service around until explicitly stopped\n"
 101                "     --send-sighup                Send SIGHUP when terminating\n"
 102                "     --service-type=TYPE          Service type\n"
 103                "     --uid=USER                   Run as system user\n"
 104                "     --gid=GROUP                  Run as system group\n"
 105                "     --nice=NICE                  Nice level\n"
 106                "     --setenv=NAME=VALUE          Set environment\n"
 107                "  -t --pty                        Run service on pseudo tty\n"
 108                "  -q --quiet                      Suppress information messages during runtime\n\n"
 109                "Timer options:\n\n"
 110                "     --on-active=SECONDS          Run after SECONDS delay\n"
 111                "     --on-boot=SECONDS            Run SECONDS after machine was booted up\n"
 112                "     --on-startup=SECONDS         Run SECONDS after systemd activation\n"
 113                "     --on-unit-active=SECONDS     Run SECONDS after the last activation\n"
 114                "     --on-unit-inactive=SECONDS   Run SECONDS after the last deactivation\n"
 115                "     --on-calendar=SPEC           Realtime timer\n"
 116                "     --timer-property=NAME=VALUE  Set timer unit property\n",
 117                program_invocation_short_name);
 118 }
 119
 120 static bool with_timer(void) {
 121         return arg_on_active || arg_on_boot || arg_on_startup || arg_on_unit_active || arg_on_unit_inactive || arg_on_calendar;
 122 }
 123
 124 static int parse_argv(int argc, char *argv[]) {
 125
 126         enum {
 127                 ARG_VERSION = 0x100,
 128                 ARG_NO_ASK_PASSWORD,
 129                 ARG_USER,
 130                 ARG_SYSTEM,
 131                 ARG_SCOPE,
 132                 ARG_UNIT,
 133                 ARG_DESCRIPTION,
 134                 ARG_SLICE,
 135                 ARG_SEND_SIGHUP,
 136                 ARG_EXEC_USER,
 137                 ARG_EXEC_GROUP,
 138                 ARG_SERVICE_TYPE,
 139                 ARG_NICE,
 140                 ARG_SETENV,
 141                 ARG_TTY,
 142                 ARG_ON_ACTIVE,
 143                 ARG_ON_BOOT,
 144                 ARG_ON_STARTUP,
 145                 ARG_ON_UNIT_ACTIVE,
 146                 ARG_ON_UNIT_INACTIVE,
 147                 ARG_ON_CALENDAR,
 148                 ARG_TIMER_PROPERTY,
 149                 ARG_NO_BLOCK,
 150         };
 151
 152         static const struct option options[] = {
 153                 { "help",              no_argument,       NULL, 'h'                  },
 154                 { "version",           no_argument,       NULL, ARG_VERSION          },
 155                 { "user",              no_argument,       NULL, ARG_USER             },
 156                 { "system",            no_argument,       NULL, ARG_SYSTEM           },
 157                 { "scope",             no_argument,       NULL, ARG_SCOPE            },
 158                 { "unit",              required_argument, NULL, ARG_UNIT             },
 159                 { "description",       required_argument, NULL, ARG_DESCRIPTION      },
 160                 { "slice",             required_argument, NULL, ARG_SLICE            },
 161                 { "remain-after-exit", no_argument,       NULL, 'r'                  },
 162                 { "send-sighup",       no_argument,       NULL, ARG_SEND_SIGHUP      },
 163                 { "host",              required_argument, NULL, 'H'                  },
 164                 { "machine",           required_argument, NULL, 'M'                  },
 165                 { "service-type",      required_argument, NULL, ARG_SERVICE_TYPE     },
 166                 { "uid",               required_argument, NULL, ARG_EXEC_USER        },
 167                 { "gid",               required_argument, NULL, ARG_EXEC_GROUP       },
 168                 { "nice",              required_argument, NULL, ARG_NICE             },
 169                 { "setenv",            required_argument, NULL, ARG_SETENV           },
 170                 { "property",          required_argument, NULL, 'p'                  },
 171                 { "tty",               no_argument,       NULL, 't'                  },
 172                 { "quiet",             no_argument,       NULL, 'q'                  },
 173                 { "on-active",         required_argument, NULL, ARG_ON_ACTIVE        },
 174                 { "on-boot",           required_argument, NULL, ARG_ON_BOOT          },
 175                 { "on-startup",        required_argument, NULL, ARG_ON_STARTUP       },
 176                 { "on-unit-active",    required_argument, NULL, ARG_ON_UNIT_ACTIVE   },
 177                 { "on-unit-inactive",  required_argument, NULL, ARG_ON_UNIT_INACTIVE },
 178                 { "on-calendar",       required_argument, NULL, ARG_ON_CALENDAR      },
 179                 { "timer-property",    required_argument, NULL, ARG_TIMER_PROPERTY   },
 180                 { "no-block",          no_argument,       NULL, ARG_NO_BLOCK         },
 181                 { "no-ask-password",   no_argument,       NULL, ARG_NO_ASK_PASSWORD },
 182                 {},
 183         };
 184
 185         int r, c;
 186
 187         assert(argc >= 0);
 188         assert(argv);
 189
 190         while ((c = getopt_long(argc, argv, "+hrH:M:p:tq", options, NULL)) >= 0)
 191
 192                 switch (c) {
 193
 194                 case 'h':
 195                         help();
 196                         return 0;
 197
 198                 case ARG_NO_ASK_PASSWORD:
 199                         arg_ask_password = false;
 200                         break;
 201
 202                 case ARG_VERSION:
 203                         return version();
 204
 205                 case ARG_USER:
 206                         arg_user = true;
 207                         break;
 208
 209                 case ARG_SYSTEM:
 210                         arg_user = false;
 211                         break;
 212
 213                 case ARG_SCOPE:
 214                         arg_scope = true;
 215                         break;
 216
 217                 case ARG_UNIT:
 218                         arg_unit = optarg;
 219                         break;
 220
 221                 case ARG_DESCRIPTION:
 222                         arg_description = optarg;
 223                         break;
 224
 225                 case ARG_SLICE:
 226                         arg_slice = optarg;
 227                         break;
 228
 229                 case ARG_SEND_SIGHUP:
 230                         arg_send_sighup = true;
 231                         break;
 232
 233                 case 'r':
 234                         arg_remain_after_exit = true;
 235                         break;
 236
 237                 case 'H':
 238                         arg_transport = BUS_TRANSPORT_REMOTE;
 239                         arg_host = optarg;
 240                         break;
 241
 242                 case 'M':
 243                         arg_transport = BUS_TRANSPORT_MACHINE;
 244                         arg_host = optarg;
 245                         break;
 246
 247                 case ARG_SERVICE_TYPE:
 248                         arg_service_type = optarg;
 249                         break;
 250
 251                 case ARG_EXEC_USER:
 252                         arg_exec_user = optarg;
 253                         break;
 254
 255                 case ARG_EXEC_GROUP:
 256                         arg_exec_group = optarg;
 257                         break;
 258
 259                 case ARG_NICE:
 260                         r = safe_atoi(optarg, &arg_nice);
 261                         if (r < 0 || arg_nice < PRIO_MIN || arg_nice >= PRIO_MAX) {
 262                                 log_error("Failed to parse nice value");
 263                                 return -EINVAL;
 264                         }
 265
 266                         arg_nice_set = true;
 267                         break;
 268
 269                 case ARG_SETENV:
 270                         if (strv_extend(&arg_environment, optarg) < 0)
 271                                 return log_oom();
 272
 273                         break;
 274
 275                 case 'p':
 276                         if (strv_extend(&arg_property, optarg) < 0)
 277                                 return log_oom();
 278
 279                         break;
 280
 281                 case 't':
 282                         arg_pty = true;
 283                         break;
 284
 285                 case 'q':
 286                         arg_quiet = true;
 287                         break;
 288
 289                 case ARG_ON_ACTIVE:
 290
 291                         r = parse_sec(optarg, &arg_on_active);
 292                         if (r < 0) {
 293                                 log_error("Failed to parse timer value: %s", optarg);
 294                                 return r;
 295                         }
 296
 297                         break;
 298
 299                 case ARG_ON_BOOT:
 300
 301                         r = parse_sec(optarg, &arg_on_boot);
 302                         if (r < 0) {
 303                                 log_error("Failed to parse timer value: %s", optarg);
 304                                 return r;
 305                         }
 306
 307                         break;
 308
 309                 case ARG_ON_STARTUP:
 310
 311                         r = parse_sec(optarg, &arg_on_startup);
 312                         if (r < 0) {
 313                                 log_error("Failed to parse timer value: %s", optarg);
 314                                 return r;
 315                         }
 316
 317                         break;
 318
 319                 case ARG_ON_UNIT_ACTIVE:
 320
 321                         r = parse_sec(optarg, &arg_on_unit_active);
 322                         if (r < 0) {
 323                                 log_error("Failed to parse timer value: %s", optarg);
 324                                 return r;
 325                         }
 326
 327                         break;
 328
 329                 case ARG_ON_UNIT_INACTIVE:
 330
 331                         r = parse_sec(optarg, &arg_on_unit_inactive);
 332                         if (r < 0) {
 333                                 log_error("Failed to parse timer value: %s", optarg);
 334                                 return r;
 335                         }
 336
 337                         break;
 338
 339                 case ARG_ON_CALENDAR: {
 340                         CalendarSpec *spec = NULL;
 341
 342                         r = calendar_spec_from_string(optarg, &spec);
 343                         if (r < 0) {
 344                                 log_error("Invalid calendar spec: %s", optarg);
 345                                 return r;
 346                         }
 347
 348                         calendar_spec_free(spec);
 349                         arg_on_calendar = optarg;
 350                         break;
 351                 }
 352
 353                 case ARG_TIMER_PROPERTY:
 354
 355                         if (strv_extend(&arg_timer_property, optarg) < 0)
 356                                 return log_oom();
 357
 358                         break;
 359
 360                 case ARG_NO_BLOCK:
 361                         arg_no_block = true;
 362                         break;
 363
 364                 case '?':
 365                         return -EINVAL;
 366
 367                 default:
 368                         assert_not_reached("Unhandled option");
 369                 }
 370
 371         if ((optind >= argc) && (!arg_unit || !with_timer())) {
 372                 log_error("Command line to execute required.");
 373                 return -EINVAL;
 374         }
 375
 376         if (arg_user && arg_transport != BUS_TRANSPORT_LOCAL) {
 377                 log_error("Execution in user context is not supported on non-local systems.");
 378                 return -EINVAL;
 379         }
 380
 381         if (arg_scope && arg_transport != BUS_TRANSPORT_LOCAL) {
 382                 log_error("Scope execution is not supported on non-local systems.");
 383                 return -EINVAL;
 384         }
 385
 386         if (arg_scope && (arg_remain_after_exit || arg_service_type)) {
 387                 log_error("--remain-after-exit and --service-type= are not supported in --scope mode.");
 388                 return -EINVAL;
 389         }
 390
 391         if (arg_pty && (with_timer() || arg_scope)) {
 392                 log_error("--pty is not compatible in timer or --scope mode.");
 393                 return -EINVAL;
 394         }
 395
 396         if (arg_pty && arg_transport == BUS_TRANSPORT_REMOTE) {
 397                 log_error("--pty is only supported when connecting to the local system or containers.");
 398                 return -EINVAL;
 399         }
 400
 401         if (arg_scope && with_timer()) {
 402                 log_error("Timer options are not supported in --scope mode.");
 403                 return -EINVAL;
 404         }
 405
 406         if (arg_timer_property && !with_timer()) {
 407                 log_error("--timer-property= has no effect without any other timer options.");
 408                 return -EINVAL;
 409         }
 410
 411         return 1;
 412 }
 413
 414 static int transient_unit_set_properties(sd_bus_message *m, char **properties) {
 415         char **i;
 416         int r;
 417
 418         r = sd_bus_message_append(m, "(sv)", "Description", "s", arg_description);
 419         if (r < 0)
 420                 return r;
 421
 422         STRV_FOREACH(i, properties) {
 423                 r = bus_append_unit_property_assignment(m, *i);
 424                 if (r < 0)
 425                         return r;
 426         }
 427
 428         return 0;
 429 }
 430
 431 static int transient_cgroup_set_properties(sd_bus_message *m) {
 432         int r;
 433         assert(m);
 434
 435         if (!isempty(arg_slice)) {
 436                 _cleanup_free_ char *slice;
 437
 438                 r = unit_name_mangle_with_suffix(arg_slice, UNIT_NAME_NOGLOB, ".slice", &slice);
 439                 if (r < 0)
 440                         return r;
 441
 442                 r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
 443                 if (r < 0)
 444                         return r;
 445         }
 446
 447         return 0;
 448 }
 449
 450 static int transient_kill_set_properties(sd_bus_message *m) {
 451         assert(m);
 452
 453         if (arg_send_sighup)
 454                 return sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", arg_send_sighup);
 455         else
 456                 return 0;
 457 }
 458
 459 static int transient_service_set_properties(sd_bus_message *m, char **argv, const char *pty_path) {
 460         int r;
 461
 462         assert(m);
 463
 464         r = transient_unit_set_properties(m, arg_property);
 465         if (r < 0)
 466                 return r;
 467
 468         r = transient_kill_set_properties(m);
 469         if (r < 0)
 470                 return r;
 471
 472         r = transient_cgroup_set_properties(m);
 473         if (r < 0)
 474                 return r;
 475
 476         if (arg_remain_after_exit) {
 477                 r = sd_bus_message_append(m, "(sv)", "RemainAfterExit", "b", arg_remain_after_exit);
 478                 if (r < 0)
 479                         return r;
 480         }
 481
 482         if (arg_service_type) {
 483                 r = sd_bus_message_append(m, "(sv)", "Type", "s", arg_service_type);
 484                 if (r < 0)
 485                         return r;
 486         }
 487
 488         if (arg_exec_user) {
 489                 r = sd_bus_message_append(m, "(sv)", "User", "s", arg_exec_user);
 490                 if (r < 0)
 491                         return r;
 492         }
 493
 494         if (arg_exec_group) {
 495                 r = sd_bus_message_append(m, "(sv)", "Group", "s", arg_exec_group);
 496                 if (r < 0)
 497                         return r;
 498         }
 499
 500         if (arg_nice_set) {
 501                 r = sd_bus_message_append(m, "(sv)", "Nice", "i", arg_nice);
 502                 if (r < 0)
 503                         return r;
 504         }
 505
 506         if (pty_path) {
 507                 const char *e;
 508
 509                 r = sd_bus_message_append(m,
 510                                           "(sv)(sv)(sv)(sv)",
 511                                           "StandardInput", "s", "tty",
 512                                           "StandardOutput", "s", "tty",
 513                                           "StandardError", "s", "tty",
 514                                           "TTYPath", "s", pty_path);
 515                 if (r < 0)
 516                         return r;
 517
 518                 e = getenv("TERM");
 519                 if (e) {
 520                         char *n;
 521
 522                         n = strjoina("TERM=", e);
 523                         r = sd_bus_message_append(m,
 524                                                   "(sv)",
 525                                                   "Environment", "as", 1, n);
 526                         if (r < 0)
 527                                 return r;
 528                 }
 529         }
 530
 531         if (!strv_isempty(arg_environment)) {
 532                 r = sd_bus_message_open_container(m, 'r', "sv");
 533                 if (r < 0)
 534                         return r;
 535
 536                 r = sd_bus_message_append(m, "s", "Environment");
 537                 if (r < 0)
 538                         return r;
 539
 540                 r = sd_bus_message_open_container(m, 'v', "as");
 541                 if (r < 0)
 542                         return r;
 543
 544                 r = sd_bus_message_append_strv(m, arg_environment);
 545                 if (r < 0)
 546                         return r;
 547
 548                 r = sd_bus_message_close_container(m);
 549                 if (r < 0)
 550                         return r;
 551
 552                 r = sd_bus_message_close_container(m);
 553                 if (r < 0)
 554                         return r;
 555         }
 556
 557         /* Exec container */
 558         {
 559                 r = sd_bus_message_open_container(m, 'r', "sv");
 560                 if (r < 0)
 561                         return r;
 562
 563                 r = sd_bus_message_append(m, "s", "ExecStart");
 564                 if (r < 0)
 565                         return r;
 566
 567                 r = sd_bus_message_open_container(m, 'v', "a(sasb)");
 568                 if (r < 0)
 569                         return r;
 570
 571                 r = sd_bus_message_open_container(m, 'a', "(sasb)");
 572                 if (r < 0)
 573                         return r;
 574
 575                 r = sd_bus_message_open_container(m, 'r', "sasb");
 576                 if (r < 0)
 577                         return r;
 578
 579                 r = sd_bus_message_append(m, "s", argv[0]);
 580                 if (r < 0)
 581                         return r;
 582
 583                 r = sd_bus_message_append_strv(m, argv);
 584                 if (r < 0)
 585                         return r;
 586
 587                 r = sd_bus_message_append(m, "b", false);
 588                 if (r < 0)
 589                         return r;
 590
 591                 r = sd_bus_message_close_container(m);
 592                 if (r < 0)
 593                         return r;
 594
 595                 r = sd_bus_message_close_container(m);
 596                 if (r < 0)
 597                         return r;
 598
 599                 r = sd_bus_message_close_container(m);
 600                 if (r < 0)
 601                         return r;
 602
 603                 r = sd_bus_message_close_container(m);
 604                 if (r < 0)
 605                         return r;
 606         }
 607
 608         return 0;
 609 }
 610
 611 static int transient_scope_set_properties(sd_bus_message *m) {
 612         int r;
 613
 614         assert(m);
 615
 616         r = transient_unit_set_properties(m, arg_property);
 617         if (r < 0)
 618                 return r;
 619
 620         r = transient_kill_set_properties(m);
 621         if (r < 0)
 622                 return r;
 623
 624         r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, (uint32_t) getpid());
 625         if (r < 0)
 626                 return r;
 627
 628         return 0;
 629 }
 630
 631 static int transient_timer_set_properties(sd_bus_message *m) {
 632         int r;
 633
 634         assert(m);
 635
 636         r = transient_unit_set_properties(m, arg_timer_property);
 637         if (r < 0)
 638                 return r;
 639
 640         /* Automatically clean up our transient timers */
 641         r = sd_bus_message_append(m, "(sv)", "RemainAfterElapse", "b", false);
 642         if (r < 0)
 643                 return r;
 644
 645         if (arg_on_active) {
 646                 r = sd_bus_message_append(m, "(sv)", "OnActiveSec", "t", arg_on_active);
 647                 if (r < 0)
 648                         return r;
 649         }
 650
 651         if (arg_on_boot) {
 652                 r = sd_bus_message_append(m, "(sv)", "OnBootSec", "t", arg_on_boot);
 653                 if (r < 0)
 654                         return r;
 655         }
 656
 657         if (arg_on_startup) {
 658                 r = sd_bus_message_append(m, "(sv)", "OnStartupSec", "t", arg_on_startup);
 659                 if (r < 0)
 660                         return r;
 661         }
 662
 663         if (arg_on_unit_active) {
 664                 r = sd_bus_message_append(m, "(sv)", "OnUnitActiveSec", "t", arg_on_unit_active);
 665                 if (r < 0)
 666                         return r;
 667         }
 668
 669         if (arg_on_unit_inactive) {
 670                 r = sd_bus_message_append(m, "(sv)", "OnUnitInactiveSec", "t", arg_on_unit_inactive);
 671                 if (r < 0)
 672                         return r;
 673         }
 674
 675         if (arg_on_calendar) {
 676                 r = sd_bus_message_append(m, "(sv)", "OnCalendar", "s", arg_on_calendar);
 677                 if (r < 0)
 678                         return r;
 679         }
 680
 681         return 0;
 682 }
 683
 684 static int make_unit_name(sd_bus *bus, UnitType t, char **ret) {
 685         const char *unique, *id;
 686         char *p;
 687         int r;
 688
 689         assert(bus);
 690         assert(t >= 0);
 691         assert(t < _UNIT_TYPE_MAX);
 692
 693         r = sd_bus_get_unique_name(bus, &unique);
 694         if (r < 0) {
 695                 sd_id128_t rnd;
 696
 697                 /* We couldn't get the unique name, which is a pretty
 698                  * common case if we are connected to systemd
 699                  * directly. In that case, just pick a random uuid as
 700                  * name */
 701
 702                 r = sd_id128_randomize(&rnd);
 703                 if (r < 0)
 704                         return log_error_errno(r, "Failed to generate random run unit name: %m");
 705
 706                 if (asprintf(ret, "run-r" SD_ID128_FORMAT_STR ".%s", SD_ID128_FORMAT_VAL(rnd), unit_type_to_string(t)) < 0)
 707                         return log_oom();
 708
 709                 return 0;
 710         }
 711
 712         /* We managed to get the unique name, then let's use that to
 713          * name our transient units. */
 714
 715         id = startswith(unique, ":1.");
 716         if (!id) {
 717                 log_error("Unique name %s has unexpected format.", unique);
 718                 return -EINVAL;
 719         }
 720
 721         p = strjoin("run-u", id, ".", unit_type_to_string(t), NULL);
 722         if (!p)
 723                 return log_oom();
 724
 725         *ret = p;
 726         return 0;
 727 }
 728
 729 static int start_transient_service(
 730                 sd_bus *bus,
 731                 char **argv) {
 732
 733         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
 734         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
 735         _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL;
 736         _cleanup_free_ char *service = NULL, *pty_path = NULL;
 737         _cleanup_close_ int master = -1;
 738         int r;
 739
 740         assert(bus);
 741         assert(argv);
 742
 743         if (arg_pty) {
 744
 745                 if (arg_transport == BUS_TRANSPORT_LOCAL) {
 746                         master = posix_openpt(O_RDWR|O_NOCTTY|O_CLOEXEC|O_NDELAY);
 747                         if (master < 0)
 748                                 return log_error_errno(errno, "Failed to acquire pseudo tty: %m");
 749
 750                         r = ptsname_malloc(master, &pty_path);
 751                         if (r < 0)
 752                                 return log_error_errno(r, "Failed to determine tty name: %m");
 753
 754                         if (unlockpt(master) < 0)
 755                                 return log_error_errno(errno, "Failed to unlock tty: %m");
 756
 757                 } else if (arg_transport == BUS_TRANSPORT_MACHINE) {
 758                         _cleanup_(sd_bus_unrefp) sd_bus *system_bus = NULL;
 759                         const char *s;
 760
 761                         r = sd_bus_default_system(&system_bus);
 762                         if (r < 0)
 763                                 return log_error_errno(r, "Failed to connect to system bus: %m");
 764
 765                         r = sd_bus_call_method(system_bus,
 766                                                "org.freedesktop.machine1",
 767                                                "/org/freedesktop/machine1",
 768                                                "org.freedesktop.machine1.Manager",
 769                                                "OpenMachinePTY",
 770                                                &error,
 771                                                &reply,
 772                                                "s", arg_host);
 773                         if (r < 0) {
 774                                 log_error("Failed to get machine PTY: %s", bus_error_message(&error, -r));
 775                                 return r;
 776                         }
 777
 778                         r = sd_bus_message_read(reply, "hs", &master, &s);
 779                         if (r < 0)
 780                                 return bus_log_parse_error(r);
 781
 782                         reply = sd_bus_message_unref(reply);
 783
 784                         master = fcntl(master, F_DUPFD_CLOEXEC, 3);
 785                         if (master < 0)
 786                                 return log_error_errno(errno, "Failed to duplicate master fd: %m");
 787
 788                         pty_path = strdup(s);
 789                         if (!pty_path)
 790                                 return log_oom();
 791                 } else
 792                         assert_not_reached("Can't allocate tty via ssh");
 793         }
 794
 795         if (!arg_no_block) {
 796                 r = bus_wait_for_jobs_new(bus, &w);
 797                 if (r < 0)
 798                         return log_error_errno(r, "Could not watch jobs: %m");
 799         }
 800
 801         if (arg_unit) {
 802                 r = unit_name_mangle_with_suffix(arg_unit, UNIT_NAME_NOGLOB, ".service", &service);
 803                 if (r < 0)
 804                         return log_error_errno(r, "Failed to mangle unit name: %m");
 805         } else {
 806                 r = make_unit_name(bus, UNIT_SERVICE, &service);
 807                 if (r < 0)
 808                         return r;
 809         }
 810
 811         r = sd_bus_message_new_method_call(
 812                         bus,
 813                         &m,
 814                         "org.freedesktop.systemd1",
 815                         "/org/freedesktop/systemd1",
 816                         "org.freedesktop.systemd1.Manager",
 817                         "StartTransientUnit");
 818         if (r < 0)
 819                 return bus_log_create_error(r);
 820
 821         r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
 822         if (r < 0)
 823                 return bus_log_create_error(r);
 824
 825         /* Name and mode */
 826         r = sd_bus_message_append(m, "ss", service, "fail");
 827         if (r < 0)
 828                 return bus_log_create_error(r);
 829
 830         /* Properties */
 831         r = sd_bus_message_open_container(m, 'a', "(sv)");
 832         if (r < 0)
 833                 return bus_log_create_error(r);
 834
 835         r = transient_service_set_properties(m, argv, pty_path);
 836         if (r < 0)
 837                 return bus_log_create_error(r);
 838
 839         r = sd_bus_message_close_container(m);
 840         if (r < 0)
 841                 return bus_log_create_error(r);
 842
 843         /* Auxiliary units */
 844         r = sd_bus_message_append(m, "a(sa(sv))", 0);
 845         if (r < 0)
 846                 return bus_log_create_error(r);
 847
 848         polkit_agent_open_if_enabled();
 849
 850         r = sd_bus_call(bus, m, 0, &error, &reply);
 851         if (r < 0)
 852                 return log_error_errno(r, "Failed to start transient service unit: %s", bus_error_message(&error, r));
 853
 854         if (w) {
 855                 const char *object;
 856
 857                 r = sd_bus_message_read(reply, "o", &object);
 858                 if (r < 0)
 859                         return bus_log_parse_error(r);
 860
 861                 r = bus_wait_for_jobs_one(w, object, arg_quiet);
 862                 if (r < 0)
 863                         return r;
 864         }
 865
 866         if (master >= 0) {
 867                 _cleanup_(pty_forward_freep) PTYForward *forward = NULL;
 868                 _cleanup_(sd_event_unrefp) sd_event *event = NULL;
 869                 char last_char = 0;
 870
 871                 r = sd_event_default(&event);
 872                 if (r < 0)
 873                         return log_error_errno(r, "Failed to get event loop: %m");
 874
 875                 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGWINCH, SIGTERM, SIGINT, -1) >= 0);
 876
 877                 (void) sd_event_add_signal(event, NULL, SIGINT, NULL, NULL);
 878                 (void) sd_event_add_signal(event, NULL, SIGTERM, NULL, NULL);
 879
 880                 if (!arg_quiet)
 881                         log_info("Running as unit %s.\nPress ^] three times within 1s to disconnect TTY.", service);
 882
 883                 r = pty_forward_new(event, master, PTY_FORWARD_IGNORE_INITIAL_VHANGUP, &forward);
 884                 if (r < 0)
 885                         return log_error_errno(r, "Failed to create PTY forwarder: %m");
 886
 887                 r = sd_event_loop(event);
 888                 if (r < 0)
 889                         return log_error_errno(r, "Failed to run event loop: %m");
 890
 891                 pty_forward_get_last_char(forward, &last_char);
 892
 893                 forward = pty_forward_free(forward);
 894
 895                 if (!arg_quiet && last_char != '\n')
 896                         fputc('\n', stdout);
 897
 898         } else if (!arg_quiet)
 899                 log_info("Running as unit %s.", service);
 900
 901         return 0;
 902 }
 903
 904 static int start_transient_scope(
 905                 sd_bus *bus,
 906                 char **argv) {
 907
 908         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
 909         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
 910         _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL;
 911         _cleanup_strv_free_ char **env = NULL, **user_env = NULL;
 912         _cleanup_free_ char *scope = NULL;
 913         const char *object = NULL;
 914         int r;
 915
 916         assert(bus);
 917         assert(argv);
 918
 919         r = bus_wait_for_jobs_new(bus, &w);
 920         if (r < 0)
 921                 return log_oom();
 922
 923         if (arg_unit) {
 924                 r = unit_name_mangle_with_suffix(arg_unit, UNIT_NAME_NOGLOB, ".scope", &scope);
 925                 if (r < 0)
 926                         return log_error_errno(r, "Failed to mangle scope name: %m");
 927         } else {
 928                 r = make_unit_name(bus, UNIT_SCOPE, &scope);
 929                 if (r < 0)
 930                         return r;
 931         }
 932
 933         r = sd_bus_message_new_method_call(
 934                         bus,
 935                         &m,
 936                         "org.freedesktop.systemd1",
 937                         "/org/freedesktop/systemd1",
 938                         "org.freedesktop.systemd1.Manager",
 939                         "StartTransientUnit");
 940         if (r < 0)
 941                 return bus_log_create_error(r);
 942
 943         r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
 944         if (r < 0)
 945                 return bus_log_create_error(r);
 946
 947         /* Name and Mode */
 948         r = sd_bus_message_append(m, "ss", scope, "fail");
 949         if (r < 0)
 950                 return bus_log_create_error(r);
 951
 952         /* Properties */
 953         r = sd_bus_message_open_container(m, 'a', "(sv)");
 954         if (r < 0)
 955                 return bus_log_create_error(r);
 956
 957         r = transient_scope_set_properties(m);
 958         if (r < 0)
 959                 return bus_log_create_error(r);
 960
 961         r = sd_bus_message_close_container(m);
 962         if (r < 0)
 963                 return bus_log_create_error(r);
 964
 965         /* Auxiliary units */
 966         r = sd_bus_message_append(m, "a(sa(sv))", 0);
 967         if (r < 0)
 968                 return bus_log_create_error(r);
 969
 970         polkit_agent_open_if_enabled();
 971
 972         r = sd_bus_call(bus, m, 0, &error, &reply);
 973         if (r < 0) {
 974                 log_error("Failed to start transient scope unit: %s", bus_error_message(&error, -r));
 975                 return r;
 976         }
 977
 978         if (arg_nice_set) {
 979                 if (setpriority(PRIO_PROCESS, 0, arg_nice) < 0)
 980                         return log_error_errno(errno, "Failed to set nice level: %m");
 981         }
 982
 983         if (arg_exec_group) {
 984                 gid_t gid;
 985
 986                 r = get_group_creds(&arg_exec_group, &gid);
 987                 if (r < 0)
 988                         return log_error_errno(r, "Failed to resolve group %s: %m", arg_exec_group);
 989
 990                 if (setresgid(gid, gid, gid) < 0)
 991                         return log_error_errno(errno, "Failed to change GID to " GID_FMT ": %m", gid);
 992         }
 993
 994         if (arg_exec_user) {
 995                 const char *home, *shell;
 996                 uid_t uid;
 997                 gid_t gid;
 998
 999                 r = get_user_creds(&arg_exec_user, &uid, &gid, &home, &shell);
1000                 if (r < 0)
1001                         return log_error_errno(r, "Failed to resolve user %s: %m", arg_exec_user);
1002
1003                 r = strv_extendf(&user_env, "HOME=%s", home);
1004                 if (r < 0)
1005                         return log_oom();
1006
1007                 r = strv_extendf(&user_env, "SHELL=%s", shell);
1008                 if (r < 0)
1009                         return log_oom();
1010
1011                 r = strv_extendf(&user_env, "USER=%s", arg_exec_user);
1012                 if (r < 0)
1013                         return log_oom();
1014
1015                 r = strv_extendf(&user_env, "LOGNAME=%s", arg_exec_user);
1016                 if (r < 0)
1017                         return log_oom();
1018
1019                 if (!arg_exec_group) {
1020                         if (setresgid(gid, gid, gid) < 0)
1021                                 return log_error_errno(errno, "Failed to change GID to " GID_FMT ": %m", gid);
1022                 }
1023
1024                 if (setresuid(uid, uid, uid) < 0)
1025                         return log_error_errno(errno, "Failed to change UID to " UID_FMT ": %m", uid);
1026         }
1027
1028         env = strv_env_merge(3, environ, user_env, arg_environment);
1029         if (!env)
1030                 return log_oom();
1031
1032         r = sd_bus_message_read(reply, "o", &object);
1033         if (r < 0)
1034                 return bus_log_parse_error(r);
1035
1036         r = bus_wait_for_jobs_one(w, object, arg_quiet);
1037         if (r < 0)
1038                 return r;
1039
1040         if (!arg_quiet)
1041                 log_info("Running scope as unit %s.", scope);
1042
1043         execvpe(argv[0], argv, env);
1044
1045         return log_error_errno(errno, "Failed to execute: %m");
1046 }
1047
1048 static int start_transient_timer(
1049                 sd_bus *bus,
1050                 char **argv) {
1051
1052         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1053         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
1054         _cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL;
1055         _cleanup_free_ char *timer = NULL, *service = NULL;
1056         const char *object = NULL;
1057         int r;
1058
1059         assert(bus);
1060         assert(argv);
1061
1062         r = bus_wait_for_jobs_new(bus, &w);
1063         if (r < 0)
1064                 return log_oom();
1065
1066         if (arg_unit) {
1067                 switch (unit_name_to_type(arg_unit)) {
1068
1069                 case UNIT_SERVICE:
1070                         service = strdup(arg_unit);
1071                         if (!service)
1072                                 return log_oom();
1073
1074                         r = unit_name_change_suffix(service, ".timer", &timer);
1075                         if (r < 0)
1076                                 return log_error_errno(r, "Failed to change unit suffix: %m");
1077                         break;
1078
1079                 case UNIT_TIMER:
1080                         timer = strdup(arg_unit);
1081                         if (!timer)
1082                                 return log_oom();
1083
1084                         r = unit_name_change_suffix(timer, ".service", &service);
1085                         if (r < 0)
1086                                 return log_error_errno(r, "Failed to change unit suffix: %m");
1087                         break;
1088
1089                 default:
1090                         r = unit_name_mangle_with_suffix(arg_unit, UNIT_NAME_NOGLOB, ".service", &service);
1091                         if (r < 0)
1092                                 return log_error_errno(r, "Failed to mangle unit name: %m");
1093
1094                         r = unit_name_mangle_with_suffix(arg_unit, UNIT_NAME_NOGLOB, ".timer", &timer);
1095                         if (r < 0)
1096                                 return log_error_errno(r, "Failed to mangle unit name: %m");
1097
1098                         break;
1099                 }
1100         } else {
1101                 r = make_unit_name(bus, UNIT_SERVICE, &service);
1102                 if (r < 0)
1103                         return r;
1104
1105                 r = unit_name_change_suffix(service, ".timer", &timer);
1106                 if (r < 0)
1107                         return log_error_errno(r, "Failed to change unit suffix: %m");
1108         }
1109
1110         r = sd_bus_message_new_method_call(
1111                         bus,
1112                         &m,
1113                         "org.freedesktop.systemd1",
1114                         "/org/freedesktop/systemd1",
1115                         "org.freedesktop.systemd1.Manager",
1116                         "StartTransientUnit");
1117         if (r < 0)
1118                 return bus_log_create_error(r);
1119
1120         r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
1121         if (r < 0)
1122                 return bus_log_create_error(r);
1123
1124         /* Name and Mode */
1125         r = sd_bus_message_append(m, "ss", timer, "fail");
1126         if (r < 0)
1127                 return bus_log_create_error(r);
1128
1129         /* Properties */
1130         r = sd_bus_message_open_container(m, 'a', "(sv)");
1131         if (r < 0)
1132                 return bus_log_create_error(r);
1133
1134         r = transient_timer_set_properties(m);
1135         if (r < 0)
1136                 return bus_log_create_error(r);
1137
1138         r = sd_bus_message_close_container(m);
1139         if (r < 0)
1140                 return bus_log_create_error(r);
1141
1142         r = sd_bus_message_open_container(m, 'a', "(sa(sv))");
1143         if (r < 0)
1144                 return bus_log_create_error(r);
1145
1146         if (argv[0]) {
1147                 r = sd_bus_message_open_container(m, 'r', "sa(sv)");
1148                 if (r < 0)
1149                         return bus_log_create_error(r);
1150
1151                 r = sd_bus_message_append(m, "s", service);
1152                 if (r < 0)
1153                         return bus_log_create_error(r);
1154
1155                 r = sd_bus_message_open_container(m, 'a', "(sv)");
1156                 if (r < 0)
1157                         return bus_log_create_error(r);
1158
1159                 r = transient_service_set_properties(m, argv, NULL);
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                 r = sd_bus_message_close_container(m);
1168                 if (r < 0)
1169                         return bus_log_create_error(r);
1170         }
1171
1172         r = sd_bus_message_close_container(m);
1173         if (r < 0)
1174                 return bus_log_create_error(r);
1175
1176         polkit_agent_open_if_enabled();
1177
1178         r = sd_bus_call(bus, m, 0, &error, &reply);
1179         if (r < 0) {
1180                 log_error("Failed to start transient timer unit: %s", bus_error_message(&error, -r));
1181                 return r;
1182         }
1183
1184         r = sd_bus_message_read(reply, "o", &object);
1185         if (r < 0)
1186                 return bus_log_parse_error(r);
1187
1188         r = bus_wait_for_jobs_one(w, object, arg_quiet);
1189         if (r < 0)
1190                 return r;
1191
1192         log_info("Running timer as unit %s.", timer);
1193         if (argv[0])
1194                 log_info("Will run service as unit %s.", service);
1195
1196         return 0;
1197 }
1198
1199 int main(int argc, char* argv[]) {
1200         _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
1201         _cleanup_free_ char *description = NULL, *command = NULL;
1202         int r;
1203
1204         log_parse_environment();
1205         log_open();
1206
1207         r = parse_argv(argc, argv);
1208         if (r <= 0)
1209                 goto finish;
1210
1211         if (argc > optind && arg_transport == BUS_TRANSPORT_LOCAL) {
1212                 /* Patch in an absolute path */
1213
1214                 r = find_binary(argv[optind], &command);
1215                 if (r < 0) {
1216                         log_error_errno(r, "Failed to find executable %s: %m", argv[optind]);
1217                         goto finish;
1218                 }
1219
1220                 argv[optind] = command;
1221         }
1222
1223         if (!arg_description) {
1224                 description = strv_join(argv + optind, " ");
1225                 if (!description) {
1226                         r = log_oom();
1227                         goto finish;
1228                 }
1229
1230                 if (arg_unit && isempty(description)) {
1231                         r = free_and_strdup(&description, arg_unit);
1232                         if (r < 0)
1233                                 goto finish;
1234                 }
1235
1236                 arg_description = description;
1237         }
1238
1239         r = bus_connect_transport_systemd(arg_transport, arg_host, arg_user, &bus);
1240         if (r < 0) {
1241                 log_error_errno(r, "Failed to create bus connection: %m");
1242                 goto finish;
1243         }
1244
1245         if (arg_scope)
1246                 r = start_transient_scope(bus, argv + optind);
1247         else if (with_timer())
1248                 r = start_transient_timer(bus, argv + optind);
1249         else
1250                 r = start_transient_service(bus, argv + optind);
1251
1252 finish:
1253         strv_free(arg_environment);
1254         strv_free(arg_property);
1255         strv_free(arg_timer_property);
1256
1257         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
1258 }