src/core/dbus-execute.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <sys/prctl.h>
  23
  24 #ifdef HAVE_SECCOMP
  25 #include <seccomp.h>
  26 #endif
  27
  28 #include "bus-util.h"
  29 #include "missing.h"
  30 #include "ioprio.h"
  31 #include "strv.h"
  32 #include "fileio.h"
  33 #include "execute.h"
  34 #include "capability.h"
  35 #include "env-util.h"
  36 #include "af-list.h"
  37 #include "namespace.h"
  38 #include "path-util.h"
  39 #include "dbus-execute.h"
  40
  41 #ifdef HAVE_SECCOMP
  42 #include "seccomp-util.h"
  43 #endif
  44
  45 BUS_DEFINE_PROPERTY_GET_ENUM(bus_property_get_exec_output, exec_output, ExecOutput);
  46
  47 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_exec_input, exec_input, ExecInput);
  48
  49 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_exec_utmp_mode, exec_utmp_mode, ExecUtmpMode);
  50
  51 static BUS_DEFINE_PROPERTY_GET_ENUM(bus_property_get_protect_home, protect_home, ProtectHome);
  52 static BUS_DEFINE_PROPERTY_GET_ENUM(bus_property_get_protect_system, protect_system, ProtectSystem);
  53
  54 static int property_get_environment_files(
  55                 sd_bus *bus,
  56                 const char *path,
  57                 const char *interface,
  58                 const char *property,
  59                 sd_bus_message *reply,
  60                 void *userdata,
  61                 sd_bus_error *error) {
  62
  63         ExecContext *c = userdata;
  64         char **j;
  65         int r;
  66
  67         assert(bus);
  68         assert(reply);
  69         assert(c);
  70
  71         r = sd_bus_message_open_container(reply, 'a', "(sb)");
  72         if (r < 0)
  73                 return r;
  74
  75         STRV_FOREACH(j, c->environment_files) {
  76                 const char *fn = *j;
  77
  78                 r = sd_bus_message_append(reply, "(sb)", fn[0] == '-' ? fn + 1 : fn, fn[0] == '-');
  79                 if (r < 0)
  80                         return r;
  81         }
  82
  83         return sd_bus_message_close_container(reply);
  84 }
  85
  86 static int property_get_rlimit(
  87                 sd_bus *bus,
  88                 const char *path,
  89                 const char *interface,
  90                 const char *property,
  91                 sd_bus_message *reply,
  92                 void *userdata,
  93                 sd_bus_error *error) {
  94
  95         struct rlimit *rl;
  96         uint64_t u;
  97         rlim_t x;
  98
  99         assert(bus);
 100         assert(reply);
 101         assert(userdata);
 102
 103         rl = *(struct rlimit**) userdata;
 104         if (rl)
 105                 x = rl->rlim_max;
 106         else {
 107                 struct rlimit buf = {};
 108                 int z;
 109
 110                 z = rlimit_from_string(property);
 111                 assert(z >= 0);
 112
 113                 getrlimit(z, &buf);
 114                 x = buf.rlim_max;
 115         }
 116
 117         /* rlim_t might have different sizes, let's map
 118          * RLIMIT_INFINITY to (uint64_t) -1, so that it is the same on
 119          * all archs */
 120         u = x == RLIM_INFINITY ? (uint64_t) -1 : (uint64_t) x;
 121
 122         return sd_bus_message_append(reply, "t", u);
 123 }
 124
 125 static int property_get_oom_score_adjust(
 126                 sd_bus *bus,
 127                 const char *path,
 128                 const char *interface,
 129                 const char *property,
 130                 sd_bus_message *reply,
 131                 void *userdata,
 132                 sd_bus_error *error) {
 133
 134
 135         ExecContext *c = userdata;
 136         int32_t n;
 137
 138         assert(bus);
 139         assert(reply);
 140         assert(c);
 141
 142         if (c->oom_score_adjust_set)
 143                 n = c->oom_score_adjust;
 144         else {
 145                 _cleanup_free_ char *t = NULL;
 146
 147                 n = 0;
 148                 if (read_one_line_file("/proc/self/oom_score_adj", &t) >= 0)
 149                         safe_atoi(t, &n);
 150         }
 151
 152         return sd_bus_message_append(reply, "i", n);
 153 }
 154
 155 static int property_get_nice(
 156                 sd_bus *bus,
 157                 const char *path,
 158                 const char *interface,
 159                 const char *property,
 160                 sd_bus_message *reply,
 161                 void *userdata,
 162                 sd_bus_error *error) {
 163
 164
 165         ExecContext *c = userdata;
 166         int32_t n;
 167
 168         assert(bus);
 169         assert(reply);
 170         assert(c);
 171
 172         if (c->nice_set)
 173                 n = c->nice;
 174         else {
 175                 errno = 0;
 176                 n = getpriority(PRIO_PROCESS, 0);
 177                 if (errno != 0)
 178                         n = 0;
 179         }
 180
 181         return sd_bus_message_append(reply, "i", n);
 182 }
 183
 184 static int property_get_ioprio(
 185                 sd_bus *bus,
 186                 const char *path,
 187                 const char *interface,
 188                 const char *property,
 189                 sd_bus_message *reply,
 190                 void *userdata,
 191                 sd_bus_error *error) {
 192
 193
 194         ExecContext *c = userdata;
 195         int32_t n;
 196
 197         assert(bus);
 198         assert(reply);
 199         assert(c);
 200
 201         if (c->ioprio_set)
 202                 n = c->ioprio;
 203         else {
 204                 n = ioprio_get(IOPRIO_WHO_PROCESS, 0);
 205                 if (n < 0)
 206                         n = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 4);
 207         }
 208
 209         return sd_bus_message_append(reply, "i", n);
 210 }
 211
 212 static int property_get_cpu_sched_policy(
 213                 sd_bus *bus,
 214                 const char *path,
 215                 const char *interface,
 216                 const char *property,
 217                 sd_bus_message *reply,
 218                 void *userdata,
 219                 sd_bus_error *error) {
 220
 221         ExecContext *c = userdata;
 222         int32_t n;
 223
 224         assert(bus);
 225         assert(reply);
 226         assert(c);
 227
 228         if (c->cpu_sched_set)
 229                 n = c->cpu_sched_policy;
 230         else {
 231                 n = sched_getscheduler(0);
 232                 if (n < 0)
 233                         n = SCHED_OTHER;
 234         }
 235
 236         return sd_bus_message_append(reply, "i", n);
 237 }
 238
 239 static int property_get_cpu_sched_priority(
 240                 sd_bus *bus,
 241                 const char *path,
 242                 const char *interface,
 243                 const char *property,
 244                 sd_bus_message *reply,
 245                 void *userdata,
 246                 sd_bus_error *error) {
 247
 248         ExecContext *c = userdata;
 249         int32_t n;
 250
 251         assert(bus);
 252         assert(reply);
 253         assert(c);
 254
 255         if (c->cpu_sched_set)
 256                 n = c->cpu_sched_priority;
 257         else {
 258                 struct sched_param p = {};
 259
 260                 if (sched_getparam(0, &p) >= 0)
 261                         n = p.sched_priority;
 262                 else
 263                         n = 0;
 264         }
 265
 266         return sd_bus_message_append(reply, "i", n);
 267 }
 268
 269 static int property_get_cpu_affinity(
 270                 sd_bus *bus,
 271                 const char *path,
 272                 const char *interface,
 273                 const char *property,
 274                 sd_bus_message *reply,
 275                 void *userdata,
 276                 sd_bus_error *error) {
 277
 278         ExecContext *c = userdata;
 279
 280         assert(bus);
 281         assert(reply);
 282         assert(c);
 283
 284         if (c->cpuset)
 285                 return sd_bus_message_append_array(reply, 'y', c->cpuset, CPU_ALLOC_SIZE(c->cpuset_ncpus));
 286         else
 287                 return sd_bus_message_append_array(reply, 'y', NULL, 0);
 288 }
 289
 290 static int property_get_timer_slack_nsec(
 291                 sd_bus *bus,
 292                 const char *path,
 293                 const char *interface,
 294                 const char *property,
 295                 sd_bus_message *reply,
 296                 void *userdata,
 297                 sd_bus_error *error) {
 298
 299         ExecContext *c = userdata;
 300         uint64_t u;
 301
 302         assert(bus);
 303         assert(reply);
 304         assert(c);
 305
 306         if (c->timer_slack_nsec != NSEC_INFINITY)
 307                 u = (uint64_t) c->timer_slack_nsec;
 308         else
 309                 u = (uint64_t) prctl(PR_GET_TIMERSLACK);
 310
 311         return sd_bus_message_append(reply, "t", u);
 312 }
 313
 314 static int property_get_capability_bounding_set(
 315                 sd_bus *bus,
 316                 const char *path,
 317                 const char *interface,
 318                 const char *property,
 319                 sd_bus_message *reply,
 320                 void *userdata,
 321                 sd_bus_error *error) {
 322
 323         ExecContext *c = userdata;
 324
 325         assert(bus);
 326         assert(reply);
 327         assert(c);
 328
 329         /* We store this negated internally, to match the kernel, but
 330          * we expose it normalized. */
 331         return sd_bus_message_append(reply, "t", ~c->capability_bounding_set_drop);
 332 }
 333
 334 static int property_get_capabilities(
 335                 sd_bus *bus,
 336                 const char *path,
 337                 const char *interface,
 338                 const char *property,
 339                 sd_bus_message *reply,
 340                 void *userdata,
 341                 sd_bus_error *error) {
 342
 343         ExecContext *c = userdata;
 344         _cleanup_cap_free_charp_ char *t = NULL;
 345         const char *s;
 346
 347         assert(bus);
 348         assert(reply);
 349         assert(c);
 350
 351         if (c->capabilities)
 352                 s = t = cap_to_text(c->capabilities, NULL);
 353         else
 354                 s = "";
 355
 356         if (!s)
 357                 return -ENOMEM;
 358
 359         return sd_bus_message_append(reply, "s", s);
 360 }
 361
 362 static int property_get_syscall_filter(
 363                 sd_bus *bus,
 364                 const char *path,
 365                 const char *interface,
 366                 const char *property,
 367                 sd_bus_message *reply,
 368                 void *userdata,
 369                 sd_bus_error *error) {
 370
 371         ExecContext *c = userdata;
 372         _cleanup_strv_free_ char **l = NULL;
 373         int r;
 374
 375 #ifdef HAVE_SECCOMP
 376         Iterator i;
 377         void *id;
 378 #endif
 379
 380         assert(bus);
 381         assert(reply);
 382         assert(c);
 383
 384         r = sd_bus_message_open_container(reply, 'r', "bas");
 385         if (r < 0)
 386                 return r;
 387
 388         r = sd_bus_message_append(reply, "b", c->syscall_whitelist);
 389         if (r < 0)
 390                 return r;
 391
 392 #ifdef HAVE_SECCOMP
 393         SET_FOREACH(id, c->syscall_filter, i) {
 394                 char *name;
 395
 396                 name = seccomp_syscall_resolve_num_arch(SCMP_ARCH_NATIVE, PTR_TO_INT(id) - 1);
 397                 if (!name)
 398                         continue;
 399
 400                 r = strv_consume(&l, name);
 401                 if (r < 0)
 402                         return r;
 403         }
 404 #endif
 405
 406         strv_sort(l);
 407
 408         r = sd_bus_message_append_strv(reply, l);
 409         if (r < 0)
 410                 return r;
 411
 412         return sd_bus_message_close_container(reply);
 413 }
 414
 415 static int property_get_syscall_archs(
 416                 sd_bus *bus,
 417                 const char *path,
 418                 const char *interface,
 419                 const char *property,
 420                 sd_bus_message *reply,
 421                 void *userdata,
 422                 sd_bus_error *error) {
 423
 424         ExecContext *c = userdata;
 425         _cleanup_strv_free_ char **l = NULL;
 426         int r;
 427
 428 #ifdef HAVE_SECCOMP
 429         Iterator i;
 430         void *id;
 431 #endif
 432
 433         assert(bus);
 434         assert(reply);
 435         assert(c);
 436
 437 #ifdef HAVE_SECCOMP
 438         SET_FOREACH(id, c->syscall_archs, i) {
 439                 const char *name;
 440
 441                 name = seccomp_arch_to_string(PTR_TO_UINT32(id) - 1);
 442                 if (!name)
 443                         continue;
 444
 445                 r = strv_extend(&l, name);
 446                 if (r < 0)
 447                         return -ENOMEM;
 448         }
 449 #endif
 450
 451         strv_sort(l);
 452
 453         r = sd_bus_message_append_strv(reply, l);
 454         if (r < 0)
 455                 return r;
 456
 457         return 0;
 458 }
 459
 460 static int property_get_syscall_errno(
 461                 sd_bus *bus,
 462                 const char *path,
 463                 const char *interface,
 464                 const char *property,
 465                 sd_bus_message *reply,
 466                 void *userdata,
 467                 sd_bus_error *error) {
 468
 469         ExecContext *c = userdata;
 470
 471         assert(bus);
 472         assert(reply);
 473         assert(c);
 474
 475         return sd_bus_message_append(reply, "i", (int32_t) c->syscall_errno);
 476 }
 477
 478 static int property_get_selinux_context(
 479                 sd_bus *bus,
 480                 const char *path,
 481                 const char *interface,
 482                 const char *property,
 483                 sd_bus_message *reply,
 484                 void *userdata,
 485                 sd_bus_error *error) {
 486
 487         ExecContext *c = userdata;
 488
 489         assert(bus);
 490         assert(reply);
 491         assert(c);
 492
 493         return sd_bus_message_append(reply, "(bs)", c->selinux_context_ignore, c->selinux_context);
 494 }
 495
 496 static int property_get_apparmor_profile(
 497                 sd_bus *bus,
 498                 const char *path,
 499                 const char *interface,
 500                 const char *property,
 501                 sd_bus_message *reply,
 502                 void *userdata,
 503                 sd_bus_error *error) {
 504
 505         ExecContext *c = userdata;
 506
 507         assert(bus);
 508         assert(reply);
 509         assert(c);
 510
 511         return sd_bus_message_append(reply, "(bs)", c->apparmor_profile_ignore, c->apparmor_profile);
 512 }
 513
 514 static int property_get_smack_process_label(
 515                 sd_bus *bus,
 516                 const char *path,
 517                 const char *interface,
 518                 const char *property,
 519                 sd_bus_message *reply,
 520                 void *userdata,
 521                 sd_bus_error *error) {
 522
 523         ExecContext *c = userdata;
 524
 525         assert(bus);
 526         assert(reply);
 527         assert(c);
 528
 529         return sd_bus_message_append(reply, "(bs)", c->smack_process_label_ignore, c->smack_process_label);
 530 }
 531
 532 static int property_get_personality(
 533                 sd_bus *bus,
 534                 const char *path,
 535                 const char *interface,
 536                 const char *property,
 537                 sd_bus_message *reply,
 538                 void *userdata,
 539                 sd_bus_error *error) {
 540
 541         ExecContext *c = userdata;
 542
 543         assert(bus);
 544         assert(reply);
 545         assert(c);
 546
 547         return sd_bus_message_append(reply, "s", personality_to_string(c->personality));
 548 }
 549
 550 static int property_get_address_families(
 551                 sd_bus *bus,
 552                 const char *path,
 553                 const char *interface,
 554                 const char *property,
 555                 sd_bus_message *reply,
 556                 void *userdata,
 557                 sd_bus_error *error) {
 558
 559         ExecContext *c = userdata;
 560         _cleanup_strv_free_ char **l = NULL;
 561         Iterator i;
 562         void *af;
 563         int r;
 564
 565         assert(bus);
 566         assert(reply);
 567         assert(c);
 568
 569         r = sd_bus_message_open_container(reply, 'r', "bas");
 570         if (r < 0)
 571                 return r;
 572
 573         r = sd_bus_message_append(reply, "b", c->address_families_whitelist);
 574         if (r < 0)
 575                 return r;
 576
 577         SET_FOREACH(af, c->address_families, i) {
 578                 const char *name;
 579
 580                 name = af_to_name(PTR_TO_INT(af));
 581                 if (!name)
 582                         continue;
 583
 584                 r = strv_extend(&l, name);
 585                 if (r < 0)
 586                         return -ENOMEM;
 587         }
 588
 589         strv_sort(l);
 590
 591         r = sd_bus_message_append_strv(reply, l);
 592         if (r < 0)
 593                 return r;
 594
 595         return sd_bus_message_close_container(reply);
 596 }
 597
 598 static int property_get_working_directory(
 599                 sd_bus *bus,
 600                 const char *path,
 601                 const char *interface,
 602                 const char *property,
 603                 sd_bus_message *reply,
 604                 void *userdata,
 605                 sd_bus_error *error) {
 606
 607         ExecContext *c = userdata;
 608         const char *wd;
 609
 610         assert(bus);
 611         assert(reply);
 612         assert(c);
 613
 614         if (c->working_directory_home)
 615                 wd = "~";
 616         else
 617                 wd = c->working_directory;
 618
 619         if (c->working_directory_missing_ok)
 620                 wd = strjoina("!", wd);
 621
 622         return sd_bus_message_append(reply, "s", wd);
 623 }
 624
 625 const sd_bus_vtable bus_exec_vtable[] = {
 626         SD_BUS_VTABLE_START(0),
 627         SD_BUS_PROPERTY("Environment", "as", NULL, offsetof(ExecContext, environment), SD_BUS_VTABLE_PROPERTY_CONST),
 628         SD_BUS_PROPERTY("EnvironmentFiles", "a(sb)", property_get_environment_files, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 629         SD_BUS_PROPERTY("UMask", "u", bus_property_get_mode, offsetof(ExecContext, umask), SD_BUS_VTABLE_PROPERTY_CONST),
 630         SD_BUS_PROPERTY("LimitCPU", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_CPU]), SD_BUS_VTABLE_PROPERTY_CONST),
 631         SD_BUS_PROPERTY("LimitFSIZE", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_FSIZE]), SD_BUS_VTABLE_PROPERTY_CONST),
 632         SD_BUS_PROPERTY("LimitDATA", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_DATA]), SD_BUS_VTABLE_PROPERTY_CONST),
 633         SD_BUS_PROPERTY("LimitSTACK", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_STACK]), SD_BUS_VTABLE_PROPERTY_CONST),
 634         SD_BUS_PROPERTY("LimitCORE", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_CORE]), SD_BUS_VTABLE_PROPERTY_CONST),
 635         SD_BUS_PROPERTY("LimitRSS", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_RSS]), SD_BUS_VTABLE_PROPERTY_CONST),
 636         SD_BUS_PROPERTY("LimitNOFILE", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_NOFILE]), SD_BUS_VTABLE_PROPERTY_CONST),
 637         SD_BUS_PROPERTY("LimitAS", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_AS]), SD_BUS_VTABLE_PROPERTY_CONST),
 638         SD_BUS_PROPERTY("LimitNPROC", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_NPROC]), SD_BUS_VTABLE_PROPERTY_CONST),
 639         SD_BUS_PROPERTY("LimitMEMLOCK", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_MEMLOCK]), SD_BUS_VTABLE_PROPERTY_CONST),
 640         SD_BUS_PROPERTY("LimitLOCKS", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_LOCKS]), SD_BUS_VTABLE_PROPERTY_CONST),
 641         SD_BUS_PROPERTY("LimitSIGPENDING", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_SIGPENDING]), SD_BUS_VTABLE_PROPERTY_CONST),
 642         SD_BUS_PROPERTY("LimitMSGQUEUE", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_MSGQUEUE]), SD_BUS_VTABLE_PROPERTY_CONST),
 643         SD_BUS_PROPERTY("LimitNICE", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_NICE]), SD_BUS_VTABLE_PROPERTY_CONST),
 644         SD_BUS_PROPERTY("LimitRTPRIO", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_RTPRIO]), SD_BUS_VTABLE_PROPERTY_CONST),
 645         SD_BUS_PROPERTY("LimitRTTIME", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_RTTIME]), SD_BUS_VTABLE_PROPERTY_CONST),
 646         SD_BUS_PROPERTY("WorkingDirectory", "s", property_get_working_directory, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 647         SD_BUS_PROPERTY("RootDirectory", "s", NULL, offsetof(ExecContext, root_directory), SD_BUS_VTABLE_PROPERTY_CONST),
 648         SD_BUS_PROPERTY("OOMScoreAdjust", "i", property_get_oom_score_adjust, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 649         SD_BUS_PROPERTY("Nice", "i", property_get_nice, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 650         SD_BUS_PROPERTY("IOScheduling", "i", property_get_ioprio, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 651         SD_BUS_PROPERTY("CPUSchedulingPolicy", "i", property_get_cpu_sched_policy, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 652         SD_BUS_PROPERTY("CPUSchedulingPriority", "i", property_get_cpu_sched_priority, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 653         SD_BUS_PROPERTY("CPUAffinity", "ay", property_get_cpu_affinity, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 654         SD_BUS_PROPERTY("TimerSlackNSec", "t", property_get_timer_slack_nsec, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 655         SD_BUS_PROPERTY("CPUSchedulingResetOnFork", "b", bus_property_get_bool, offsetof(ExecContext, cpu_sched_reset_on_fork), SD_BUS_VTABLE_PROPERTY_CONST),
 656         SD_BUS_PROPERTY("NonBlocking", "b", bus_property_get_bool, offsetof(ExecContext, non_blocking), SD_BUS_VTABLE_PROPERTY_CONST),
 657         SD_BUS_PROPERTY("StandardInput", "s", property_get_exec_input, offsetof(ExecContext, std_input), SD_BUS_VTABLE_PROPERTY_CONST),
 658         SD_BUS_PROPERTY("StandardOutput", "s", bus_property_get_exec_output, offsetof(ExecContext, std_output), SD_BUS_VTABLE_PROPERTY_CONST),
 659         SD_BUS_PROPERTY("StandardError", "s", bus_property_get_exec_output, offsetof(ExecContext, std_error), SD_BUS_VTABLE_PROPERTY_CONST),
 660         SD_BUS_PROPERTY("TTYPath", "s", NULL, offsetof(ExecContext, tty_path), SD_BUS_VTABLE_PROPERTY_CONST),
 661         SD_BUS_PROPERTY("TTYReset", "b", bus_property_get_bool, offsetof(ExecContext, tty_reset), SD_BUS_VTABLE_PROPERTY_CONST),
 662         SD_BUS_PROPERTY("TTYVHangup", "b", bus_property_get_bool, offsetof(ExecContext, tty_vhangup), SD_BUS_VTABLE_PROPERTY_CONST),
 663         SD_BUS_PROPERTY("TTYVTDisallocate", "b", bus_property_get_bool, offsetof(ExecContext, tty_vt_disallocate), SD_BUS_VTABLE_PROPERTY_CONST),
 664         SD_BUS_PROPERTY("SyslogPriority", "i", bus_property_get_int, offsetof(ExecContext, syslog_priority), SD_BUS_VTABLE_PROPERTY_CONST),
 665         SD_BUS_PROPERTY("SyslogIdentifier", "s", NULL, offsetof(ExecContext, syslog_identifier), SD_BUS_VTABLE_PROPERTY_CONST),
 666         SD_BUS_PROPERTY("SyslogLevelPrefix", "b", bus_property_get_bool, offsetof(ExecContext, syslog_level_prefix), SD_BUS_VTABLE_PROPERTY_CONST),
 667         SD_BUS_PROPERTY("Capabilities", "s", property_get_capabilities, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 668         SD_BUS_PROPERTY("SecureBits", "i", bus_property_get_int, offsetof(ExecContext, secure_bits), SD_BUS_VTABLE_PROPERTY_CONST),
 669         SD_BUS_PROPERTY("CapabilityBoundingSet", "t", property_get_capability_bounding_set, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 670         SD_BUS_PROPERTY("User", "s", NULL, offsetof(ExecContext, user), SD_BUS_VTABLE_PROPERTY_CONST),
 671         SD_BUS_PROPERTY("Group", "s", NULL, offsetof(ExecContext, group), SD_BUS_VTABLE_PROPERTY_CONST),
 672         SD_BUS_PROPERTY("SupplementaryGroups", "as", NULL, offsetof(ExecContext, supplementary_groups), SD_BUS_VTABLE_PROPERTY_CONST),
 673         SD_BUS_PROPERTY("PAMName", "s", NULL, offsetof(ExecContext, pam_name), SD_BUS_VTABLE_PROPERTY_CONST),
 674         SD_BUS_PROPERTY("ReadWriteDirectories", "as", NULL, offsetof(ExecContext, read_write_dirs), SD_BUS_VTABLE_PROPERTY_CONST),
 675         SD_BUS_PROPERTY("ReadOnlyDirectories", "as", NULL, offsetof(ExecContext, read_only_dirs), SD_BUS_VTABLE_PROPERTY_CONST),
 676         SD_BUS_PROPERTY("InaccessibleDirectories", "as", NULL, offsetof(ExecContext, inaccessible_dirs), SD_BUS_VTABLE_PROPERTY_CONST),
 677         SD_BUS_PROPERTY("MountFlags", "t", bus_property_get_ulong, offsetof(ExecContext, mount_flags), SD_BUS_VTABLE_PROPERTY_CONST),
 678         SD_BUS_PROPERTY("PrivateTmp", "b", bus_property_get_bool, offsetof(ExecContext, private_tmp), SD_BUS_VTABLE_PROPERTY_CONST),
 679         SD_BUS_PROPERTY("PrivateNetwork", "b", bus_property_get_bool, offsetof(ExecContext, private_network), SD_BUS_VTABLE_PROPERTY_CONST),
 680         SD_BUS_PROPERTY("PrivateDevices", "b", bus_property_get_bool, offsetof(ExecContext, private_devices), SD_BUS_VTABLE_PROPERTY_CONST),
 681         SD_BUS_PROPERTY("ProtectHome", "s", bus_property_get_protect_home, offsetof(ExecContext, protect_home), SD_BUS_VTABLE_PROPERTY_CONST),
 682         SD_BUS_PROPERTY("ProtectSystem", "s", bus_property_get_protect_system, offsetof(ExecContext, protect_system), SD_BUS_VTABLE_PROPERTY_CONST),
 683         SD_BUS_PROPERTY("SameProcessGroup", "b", bus_property_get_bool, offsetof(ExecContext, same_pgrp), SD_BUS_VTABLE_PROPERTY_CONST),
 684         SD_BUS_PROPERTY("UtmpIdentifier", "s", NULL, offsetof(ExecContext, utmp_id), SD_BUS_VTABLE_PROPERTY_CONST),
 685         SD_BUS_PROPERTY("UtmpMode", "s", property_get_exec_utmp_mode, offsetof(ExecContext, utmp_mode), SD_BUS_VTABLE_PROPERTY_CONST),
 686         SD_BUS_PROPERTY("SELinuxContext", "(bs)", property_get_selinux_context, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 687         SD_BUS_PROPERTY("AppArmorProfile", "(bs)", property_get_apparmor_profile, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 688         SD_BUS_PROPERTY("SmackProcessLabel", "(bs)", property_get_smack_process_label, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 689         SD_BUS_PROPERTY("IgnoreSIGPIPE", "b", bus_property_get_bool, offsetof(ExecContext, ignore_sigpipe), SD_BUS_VTABLE_PROPERTY_CONST),
 690         SD_BUS_PROPERTY("NoNewPrivileges", "b", bus_property_get_bool, offsetof(ExecContext, no_new_privileges), SD_BUS_VTABLE_PROPERTY_CONST),
 691         SD_BUS_PROPERTY("SystemCallFilter", "(bas)", property_get_syscall_filter, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 692         SD_BUS_PROPERTY("SystemCallArchitectures", "as", property_get_syscall_archs, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 693         SD_BUS_PROPERTY("SystemCallErrorNumber", "i", property_get_syscall_errno, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 694         SD_BUS_PROPERTY("Personality", "s", property_get_personality, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 695         SD_BUS_PROPERTY("RestrictAddressFamilies", "(bas)", property_get_address_families, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 696         SD_BUS_PROPERTY("RuntimeDirectoryMode", "u", bus_property_get_mode, offsetof(ExecContext, runtime_directory_mode), SD_BUS_VTABLE_PROPERTY_CONST),
 697         SD_BUS_PROPERTY("RuntimeDirectory", "as", NULL, offsetof(ExecContext, runtime_directory), SD_BUS_VTABLE_PROPERTY_CONST),
 698         SD_BUS_VTABLE_END
 699 };
 700
 701 static int append_exec_command(sd_bus_message *reply, ExecCommand *c) {
 702         int r;
 703
 704         assert(reply);
 705         assert(c);
 706
 707         if (!c->path)
 708                 return 0;
 709
 710         r = sd_bus_message_open_container(reply, 'r', "sasbttttuii");
 711         if (r < 0)
 712                 return r;
 713
 714         r = sd_bus_message_append(reply, "s", c->path);
 715         if (r < 0)
 716                 return r;
 717
 718         r = sd_bus_message_append_strv(reply, c->argv);
 719         if (r < 0)
 720                 return r;
 721
 722         r = sd_bus_message_append(reply, "bttttuii",
 723                                   c->ignore,
 724                                   c->exec_status.start_timestamp.realtime,
 725                                   c->exec_status.start_timestamp.monotonic,
 726                                   c->exec_status.exit_timestamp.realtime,
 727                                   c->exec_status.exit_timestamp.monotonic,
 728                                   (uint32_t) c->exec_status.pid,
 729                                   (int32_t) c->exec_status.code,
 730                                   (int32_t) c->exec_status.status);
 731         if (r < 0)
 732                 return r;
 733
 734         return sd_bus_message_close_container(reply);
 735 }
 736
 737 int bus_property_get_exec_command(
 738                 sd_bus *bus,
 739                 const char *path,
 740                 const char *interface,
 741                 const char *property,
 742                 sd_bus_message *reply,
 743                 void *userdata,
 744                 sd_bus_error *ret_error) {
 745
 746         ExecCommand *c = (ExecCommand*) userdata;
 747         int r;
 748
 749         assert(bus);
 750         assert(reply);
 751
 752         r = sd_bus_message_open_container(reply, 'a', "(sasbttttuii)");
 753         if (r < 0)
 754                 return r;
 755
 756         r = append_exec_command(reply, c);
 757         if (r < 0)
 758                 return r;
 759
 760         return sd_bus_message_close_container(reply);
 761 }
 762
 763 int bus_property_get_exec_command_list(
 764                 sd_bus *bus,
 765                 const char *path,
 766                 const char *interface,
 767                 const char *property,
 768                 sd_bus_message *reply,
 769                 void *userdata,
 770                 sd_bus_error *ret_error) {
 771
 772         ExecCommand *c = *(ExecCommand**) userdata;
 773         int r;
 774
 775         assert(bus);
 776         assert(reply);
 777
 778         r = sd_bus_message_open_container(reply, 'a', "(sasbttttuii)");
 779         if (r < 0)
 780                 return r;
 781
 782         LIST_FOREACH(command, c, c) {
 783                 r = append_exec_command(reply, c);
 784                 if (r < 0)
 785                         return r;
 786         }
 787
 788         return sd_bus_message_close_container(reply);
 789 }
 790
 791 int bus_exec_context_set_transient_property(
 792                 Unit *u,
 793                 ExecContext *c,
 794                 const char *name,
 795                 sd_bus_message *message,
 796                 UnitSetPropertiesMode mode,
 797                 sd_bus_error *error) {
 798
 799         int r;
 800
 801         assert(u);
 802         assert(c);
 803         assert(name);
 804         assert(message);
 805
 806         if (streq(name, "User")) {
 807                 const char *uu;
 808
 809                 r = sd_bus_message_read(message, "s", &uu);
 810                 if (r < 0)
 811                         return r;
 812
 813                 if (mode != UNIT_CHECK) {
 814
 815                         if (isempty(uu)) {
 816                                 c->user = mfree(c->user);
 817                         } else {
 818                                 char *t;
 819
 820                                 t = strdup(uu);
 821                                 if (!t)
 822                                         return -ENOMEM;
 823
 824                                 free(c->user);
 825                                 c->user = t;
 826                         }
 827
 828                         unit_write_drop_in_private_format(u, mode, name, "User=%s\n", uu);
 829                 }
 830
 831                 return 1;
 832
 833         } else if (streq(name, "Group")) {
 834                 const char *gg;
 835
 836                 r = sd_bus_message_read(message, "s", &gg);
 837                 if (r < 0)
 838                         return r;
 839
 840                 if (mode != UNIT_CHECK) {
 841
 842                         if (isempty(gg)) {
 843                                 c->group = mfree(c->group);
 844                         } else {
 845                                 char *t;
 846
 847                                 t = strdup(gg);
 848                                 if (!t)
 849                                         return -ENOMEM;
 850
 851                                 free(c->group);
 852                                 c->group = t;
 853                         }
 854
 855                         unit_write_drop_in_private_format(u, mode, name, "Group=%s\n", gg);
 856                 }
 857
 858                 return 1;
 859         } else if (streq(name, "SyslogIdentifier")) {
 860                 const char *id;
 861
 862                 r = sd_bus_message_read(message, "s", &id);
 863                 if (r < 0)
 864                         return r;
 865
 866                 if (mode != UNIT_CHECK) {
 867
 868                         if (isempty(id)) {
 869                                 c->syslog_identifier = mfree(c->syslog_identifier);
 870                         } else {
 871                                 char *t;
 872
 873                                 t = strdup(id);
 874                                 if (!t)
 875                                         return -ENOMEM;
 876
 877                                 free(c->syslog_identifier);
 878                                 c->syslog_identifier = t;
 879                         }
 880
 881                         unit_write_drop_in_private_format(u, mode, name, "SyslogIdentifier=%s\n", id);
 882                 }
 883
 884                 return 1;
 885         } else if (streq(name, "Nice")) {
 886                 int n;
 887
 888                 r = sd_bus_message_read(message, "i", &n);
 889                 if (r < 0)
 890                         return r;
 891
 892                 if (n < PRIO_MIN || n >= PRIO_MAX)
 893                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Nice value out of range");
 894
 895                 if (mode != UNIT_CHECK) {
 896                         c->nice = n;
 897                         unit_write_drop_in_private_format(u, mode, name, "Nice=%i\n", n);
 898                 }
 899
 900                 return 1;
 901
 902         } else if (STR_IN_SET(name, "TTYPath", "RootDirectory")) {
 903                 const char *s;
 904
 905                 r = sd_bus_message_read(message, "s", &s);
 906                 if (r < 0)
 907                         return r;
 908
 909                 if (!path_is_absolute(s))
 910                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "%s takes an absolute path", name);
 911
 912                 if (mode != UNIT_CHECK) {
 913                         if (streq(name, "TTYPath"))
 914                                 r = free_and_strdup(&c->tty_path, s);
 915                         else {
 916                                 assert(streq(name, "RootDirectory"));
 917                                 r = free_and_strdup(&c->root_directory, s);
 918                         }
 919                         if (r < 0)
 920                                 return r;
 921
 922                         unit_write_drop_in_private_format(u, mode, name, "%s=%s\n", name, s);
 923                 }
 924
 925                 return 1;
 926
 927         } else if (streq(name, "WorkingDirectory")) {
 928                 const char *s;
 929                 bool missing_ok;
 930
 931                 r = sd_bus_message_read(message, "s", &s);
 932                 if (r < 0)
 933                         return r;
 934
 935                 if (s[0] == '-') {
 936                         missing_ok = true;
 937                         s++;
 938                 } else
 939                         missing_ok = false;
 940
 941                 if (!streq(s, "~") && !path_is_absolute(s))
 942                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "WorkingDirectory= expects an absolute path or '~'");
 943
 944                 if (mode != UNIT_CHECK) {
 945                         if (streq(s, "~")) {
 946                                 c->working_directory = mfree(c->working_directory);
 947                                 c->working_directory_home = true;
 948                         } else {
 949                                 r = free_and_strdup(&c->working_directory, s);
 950                                 if (r < 0)
 951                                         return r;
 952
 953                                 c->working_directory_home = false;
 954                         }
 955
 956                         c->working_directory_missing_ok = missing_ok;
 957                         unit_write_drop_in_private_format(u, mode, name, "WorkingDirectory=%s%s", missing_ok ? "-" : "", s);
 958                 }
 959
 960                 return 1;
 961
 962         } else if (streq(name, "StandardInput")) {
 963                 const char *s;
 964                 ExecInput p;
 965
 966                 r = sd_bus_message_read(message, "s", &s);
 967                 if (r < 0)
 968                         return r;
 969
 970                 p = exec_input_from_string(s);
 971                 if (p < 0)
 972                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid standard input name");
 973
 974                 if (mode != UNIT_CHECK) {
 975                         c->std_input = p;
 976
 977                         unit_write_drop_in_private_format(u, mode, name, "StandardInput=%s\n", exec_input_to_string(p));
 978                 }
 979
 980                 return 1;
 981
 982
 983         } else if (streq(name, "StandardOutput")) {
 984                 const char *s;
 985                 ExecOutput p;
 986
 987                 r = sd_bus_message_read(message, "s", &s);
 988                 if (r < 0)
 989                         return r;
 990
 991                 p = exec_output_from_string(s);
 992                 if (p < 0)
 993                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid standard output name");
 994
 995                 if (mode != UNIT_CHECK) {
 996                         c->std_output = p;
 997
 998                         unit_write_drop_in_private_format(u, mode, name, "StandardOutput=%s\n", exec_output_to_string(p));
 999                 }
1000
1001                 return 1;
1002
1003         } else if (streq(name, "StandardError")) {
1004                 const char *s;
1005                 ExecOutput p;
1006
1007                 r = sd_bus_message_read(message, "s", &s);
1008                 if (r < 0)
1009                         return r;
1010
1011                 p = exec_output_from_string(s);
1012                 if (p < 0)
1013                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid standard error name");
1014
1015                 if (mode != UNIT_CHECK) {
1016                         c->std_error = p;
1017
1018                         unit_write_drop_in_private_format(u, mode, name, "StandardError=%s\n", exec_output_to_string(p));
1019                 }
1020
1021                 return 1;
1022
1023         } else if (STR_IN_SET(name,
1024                               "IgnoreSIGPIPE", "TTYVHangup", "TTYReset",
1025                               "PrivateTmp", "PrivateDevices", "PrivateNetwork",
1026                               "NoNewPrivileges", "SyslogLevelPrefix")) {
1027                 int b;
1028
1029                 r = sd_bus_message_read(message, "b", &b);
1030                 if (r < 0)
1031                         return r;
1032
1033                 if (mode != UNIT_CHECK) {
1034                         if (streq(name, "IgnoreSIGPIPE"))
1035                                 c->ignore_sigpipe = b;
1036                         else if (streq(name, "TTYVHangup"))
1037                                 c->tty_vhangup = b;
1038                         else if (streq(name, "TTYReset"))
1039                                 c->tty_reset = b;
1040                         else if (streq(name, "PrivateTmp"))
1041                                 c->private_tmp = b;
1042                         else if (streq(name, "PrivateDevices"))
1043                                 c->private_devices = b;
1044                         else if (streq(name, "PrivateNetwork"))
1045                                 c->private_network = b;
1046                         else if (streq(name, "NoNewPrivileges"))
1047                                 c->no_new_privileges = b;
1048                         else if (streq(name, "SyslogLevelPrefix"))
1049                                 c->syslog_level_prefix = b;
1050
1051                         unit_write_drop_in_private_format(u, mode, name, "%s=%s\n", name, yes_no(b));
1052                 }
1053
1054                 return 1;
1055
1056         } else if (streq(name, "UtmpIdentifier")) {
1057                 const char *id;
1058
1059                 r = sd_bus_message_read(message, "s", &id);
1060                 if (r < 0)
1061                         return r;
1062
1063                 if (mode != UNIT_CHECK) {
1064                         if (isempty(id))
1065                                 c->utmp_id = mfree(c->utmp_id);
1066                         else if (free_and_strdup(&c->utmp_id, id) < 0)
1067                                 return -ENOMEM;
1068
1069                         unit_write_drop_in_private_format(u, mode, name, "UtmpIdentifier=%s\n", strempty(id));
1070                 }
1071
1072                 return 1;
1073
1074         } else if (streq(name, "UtmpMode")) {
1075                 const char *s;
1076                 ExecUtmpMode m;
1077
1078                 r = sd_bus_message_read(message, "s", &s);
1079                 if (r < 0)
1080                         return r;
1081
1082                 m = exec_utmp_mode_from_string(s);
1083                 if (m < 0)
1084                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid utmp mode");
1085
1086                 if (mode != UNIT_CHECK) {
1087                         c->utmp_mode = m;
1088
1089                         unit_write_drop_in_private_format(u, mode, name, "UtmpMode=%s\n", exec_utmp_mode_to_string(m));
1090                 }
1091
1092                 return 1;
1093
1094         } else if (streq(name, "PAMName")) {
1095                 const char *n;
1096
1097                 r = sd_bus_message_read(message, "s", &n);
1098                 if (r < 0)
1099                         return r;
1100
1101                 if (mode != UNIT_CHECK) {
1102                         if (isempty(n))
1103                                 c->pam_name = mfree(c->pam_name);
1104                         else if (free_and_strdup(&c->pam_name, n) < 0)
1105                                 return -ENOMEM;
1106
1107                         unit_write_drop_in_private_format(u, mode, name, "PAMName=%s\n", strempty(n));
1108                 }
1109
1110                 return 1;
1111
1112         } else if (streq(name, "Environment")) {
1113
1114                 _cleanup_strv_free_ char **l = NULL;
1115
1116                 r = sd_bus_message_read_strv(message, &l);
1117                 if (r < 0)
1118                         return r;
1119
1120                 if (!strv_env_is_valid(l))
1121                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid environment block.");
1122
1123                 if (mode != UNIT_CHECK) {
1124                         _cleanup_free_ char *joined = NULL;
1125                         char **e;
1126
1127                         e = strv_env_merge(2, c->environment, l);
1128                         if (!e)
1129                                 return -ENOMEM;
1130
1131                         strv_free(c->environment);
1132                         c->environment = e;
1133
1134                         joined = strv_join_quoted(c->environment);
1135                         if (!joined)
1136                                 return -ENOMEM;
1137
1138                         unit_write_drop_in_private_format(u, mode, name, "Environment=%s\n", joined);
1139                 }
1140
1141                 return 1;
1142
1143         } else if (rlimit_from_string(name) >= 0) {
1144                 uint64_t rl;
1145                 rlim_t x;
1146
1147                 r = sd_bus_message_read(message, "t", &rl);
1148                 if (r < 0)
1149                         return r;
1150
1151                 if (rl == (uint64_t) -1)
1152                         x = RLIM_INFINITY;
1153                 else {
1154                         x = (rlim_t) rl;
1155
1156                         if ((uint64_t) x != rl)
1157                                 return -ERANGE;
1158                 }
1159
1160                 if (mode != UNIT_CHECK) {
1161                         int z;
1162
1163                         z = rlimit_from_string(name);
1164
1165                         if (!c->rlimit[z]) {
1166                                 c->rlimit[z] = new(struct rlimit, 1);
1167                                 if (!c->rlimit[z])
1168                                         return -ENOMEM;
1169                         }
1170
1171                         c->rlimit[z]->rlim_cur = c->rlimit[z]->rlim_max = x;
1172
1173                         if (x == RLIM_INFINITY)
1174                                 unit_write_drop_in_private_format(u, mode, name, "%s=infinity\n", name);
1175                         else
1176                                 unit_write_drop_in_private_format(u, mode, name, "%s=%" PRIu64 "\n", name, rl);
1177                 }
1178
1179                 return 1;
1180         }
1181
1182         return 0;
1183 }