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 #include "bus-util.h"
  25 #include "missing.h"
  26 #include "ioprio.h"
  27 #include "strv.h"
  28 #include "fileio.h"
  29 #include "execute.h"
  30 #include "dbus-execute.h"
  31 #include "capability.h"
  32 #include "env-util.h"
  33
  34 BUS_DEFINE_PROPERTY_GET_ENUM(bus_property_get_exec_output, exec_output, ExecOutput);
  35
  36 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_exec_input, exec_input, ExecInput);
  37
  38 static int property_get_environment_files(
  39                 sd_bus *bus,
  40                 const char *path,
  41                 const char *interface,
  42                 const char *property,
  43                 sd_bus_message *reply,
  44                 void *userdata,
  45                 sd_bus_error *error) {
  46
  47         ExecContext *c = userdata;
  48         char **j;
  49         int r;
  50
  51         assert(bus);
  52         assert(reply);
  53         assert(c);
  54
  55         r = sd_bus_message_open_container(reply, 'a', "(sb)");
  56         if (r < 0)
  57                 return r;
  58
  59         STRV_FOREACH(j, c->environment_files) {
  60                 const char *fn = *j;
  61
  62                 r = sd_bus_message_append(reply, "(sb)", fn[0] == '-' ? fn + 1 : fn, fn[0] == '-');
  63                 if (r < 0)
  64                         return r;
  65         }
  66
  67         return sd_bus_message_close_container(reply);
  68 }
  69
  70 static int property_get_rlimit(
  71                 sd_bus *bus,
  72                 const char *path,
  73                 const char *interface,
  74                 const char *property,
  75                 sd_bus_message *reply,
  76                 void *userdata,
  77                 sd_bus_error *error) {
  78
  79         struct rlimit *rl;
  80         uint64_t u;
  81
  82         assert(bus);
  83         assert(reply);
  84         assert(userdata);
  85
  86         rl = *(struct rlimit**) userdata;
  87         if (rl)
  88                 u = (uint64_t) rl->rlim_max;
  89         else {
  90                 struct rlimit buf = {};
  91                 int z;
  92
  93                 z = rlimit_from_string(property);
  94                 assert(z >= 0);
  95
  96                 getrlimit(z, &buf);
  97
  98                 u = (uint64_t) buf.rlim_max;
  99         }
 100
 101         return sd_bus_message_append(reply, "t", u);
 102 }
 103
 104 static int property_get_oom_score_adjust(
 105                 sd_bus *bus,
 106                 const char *path,
 107                 const char *interface,
 108                 const char *property,
 109                 sd_bus_message *reply,
 110                 void *userdata,
 111                 sd_bus_error *error) {
 112
 113
 114         ExecContext *c = userdata;
 115         int32_t n;
 116
 117         assert(bus);
 118         assert(reply);
 119         assert(c);
 120
 121         if (c->oom_score_adjust_set)
 122                 n = c->oom_score_adjust;
 123         else {
 124                 _cleanup_free_ char *t = NULL;
 125
 126                 n = 0;
 127                 if (read_one_line_file("/proc/self/oom_score_adj", &t) >= 0)
 128                         safe_atoi(t, &n);
 129         }
 130
 131         return sd_bus_message_append(reply, "i", n);
 132 }
 133
 134 static int property_get_nice(
 135                 sd_bus *bus,
 136                 const char *path,
 137                 const char *interface,
 138                 const char *property,
 139                 sd_bus_message *reply,
 140                 void *userdata,
 141                 sd_bus_error *error) {
 142
 143
 144         ExecContext *c = userdata;
 145         int32_t n;
 146
 147         assert(bus);
 148         assert(reply);
 149         assert(c);
 150
 151         if (c->nice_set)
 152                 n = c->nice;
 153         else {
 154                 errno = 0;
 155                 n = getpriority(PRIO_PROCESS, 0);
 156                 if (errno != 0)
 157                         n = 0;
 158         }
 159
 160         return sd_bus_message_append(reply, "i", n);
 161 }
 162
 163 static int property_get_ioprio(
 164                 sd_bus *bus,
 165                 const char *path,
 166                 const char *interface,
 167                 const char *property,
 168                 sd_bus_message *reply,
 169                 void *userdata,
 170                 sd_bus_error *error) {
 171
 172
 173         ExecContext *c = userdata;
 174         int32_t n;
 175
 176         assert(bus);
 177         assert(reply);
 178         assert(c);
 179
 180         if (c->ioprio_set)
 181                 n = c->ioprio;
 182         else {
 183                 n = ioprio_get(IOPRIO_WHO_PROCESS, 0);
 184                 if (n < 0)
 185                         n = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 4);
 186         }
 187
 188         return sd_bus_message_append(reply, "i", n);
 189 }
 190
 191 static int property_get_cpu_sched_policy(
 192                 sd_bus *bus,
 193                 const char *path,
 194                 const char *interface,
 195                 const char *property,
 196                 sd_bus_message *reply,
 197                 void *userdata,
 198                 sd_bus_error *error) {
 199
 200         ExecContext *c = userdata;
 201         int32_t n;
 202
 203         assert(bus);
 204         assert(reply);
 205         assert(c);
 206
 207         if (c->cpu_sched_set)
 208                 n = c->cpu_sched_policy;
 209         else {
 210                 n = sched_getscheduler(0);
 211                 if (n < 0)
 212                         n = SCHED_OTHER;
 213         }
 214
 215         return sd_bus_message_append(reply, "i", n);
 216 }
 217
 218 static int property_get_cpu_sched_priority(
 219                 sd_bus *bus,
 220                 const char *path,
 221                 const char *interface,
 222                 const char *property,
 223                 sd_bus_message *reply,
 224                 void *userdata,
 225                 sd_bus_error *error) {
 226
 227         ExecContext *c = userdata;
 228         int32_t n;
 229
 230         assert(bus);
 231         assert(reply);
 232         assert(c);
 233
 234         if (c->cpu_sched_set)
 235                 n = c->cpu_sched_priority;
 236         else {
 237                 struct sched_param p = {};
 238
 239                 if (sched_getparam(0, &p) >= 0)
 240                         n = p.sched_priority;
 241                 else
 242                         n = 0;
 243         }
 244
 245         return sd_bus_message_append(reply, "i", n);
 246 }
 247
 248 static int property_get_cpu_affinity(
 249                 sd_bus *bus,
 250                 const char *path,
 251                 const char *interface,
 252                 const char *property,
 253                 sd_bus_message *reply,
 254                 void *userdata,
 255                 sd_bus_error *error) {
 256
 257         ExecContext *c = userdata;
 258
 259         assert(bus);
 260         assert(reply);
 261         assert(c);
 262
 263         if (c->cpuset)
 264                 return sd_bus_message_append_array(reply, 'y', c->cpuset, CPU_ALLOC_SIZE(c->cpuset_ncpus));
 265         else
 266                 return sd_bus_message_append_array(reply, 'y', NULL, 0);
 267 }
 268
 269 static int property_get_timer_slack_nsec(
 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         uint64_t u;
 280
 281         assert(bus);
 282         assert(reply);
 283         assert(c);
 284
 285         if (c->timer_slack_nsec != (nsec_t) -1)
 286                 u = (uint64_t) c->timer_slack_nsec;
 287         else
 288                 u = (uint64_t) prctl(PR_GET_TIMERSLACK);
 289
 290         return sd_bus_message_append(reply, "t", u);
 291 }
 292
 293 static int property_get_capability_bounding_set(
 294                 sd_bus *bus,
 295                 const char *path,
 296                 const char *interface,
 297                 const char *property,
 298                 sd_bus_message *reply,
 299                 void *userdata,
 300                 sd_bus_error *error) {
 301
 302         ExecContext *c = userdata;
 303
 304         assert(bus);
 305         assert(reply);
 306         assert(c);
 307
 308         /* We store this negated internally, to match the kernel, but
 309          * we expose it normalized. */
 310         return sd_bus_message_append(reply, "t", ~c->capability_bounding_set_drop);
 311 }
 312
 313 static int property_get_capabilities(
 314                 sd_bus *bus,
 315                 const char *path,
 316                 const char *interface,
 317                 const char *property,
 318                 sd_bus_message *reply,
 319                 void *userdata,
 320                 sd_bus_error *error) {
 321
 322         ExecContext *c = userdata;
 323         _cleanup_cap_free_charp_ char *t = NULL;
 324         const char *s;
 325
 326         assert(bus);
 327         assert(reply);
 328         assert(c);
 329
 330         if (c->capabilities)
 331                 s = t = cap_to_text(c->capabilities, NULL);
 332         else
 333                 s = "";
 334
 335         if (!s)
 336                 return -ENOMEM;
 337
 338         return sd_bus_message_append(reply, "s", s);
 339 }
 340
 341 static int property_get_syscall_filter(
 342                 sd_bus *bus,
 343                 const char *path,
 344                 const char *interface,
 345                 const char *property,
 346                 sd_bus_message *reply,
 347                 void *userdata,
 348                 sd_bus_error *error) {
 349
 350         ExecContext *c = userdata;
 351         _cleanup_strv_free_ char **l = NULL;
 352         _cleanup_free_ char *t = NULL;
 353         Iterator i;
 354         void *id;
 355         int r;
 356
 357         assert(bus);
 358         assert(reply);
 359         assert(c);
 360
 361         SET_FOREACH(id, c->syscall_filter, i) {
 362                 char *name;
 363
 364                 name = seccomp_syscall_resolve_num_arch(SCMP_ARCH_NATIVE, PTR_TO_INT(id) - 1);
 365                 if (!name)
 366                         continue;
 367
 368                 r = strv_push(&l, name);
 369                 if (r < 0) {
 370                         free(name);
 371                         return -ENOMEM;
 372                 }
 373         }
 374
 375         strv_sort(l);
 376
 377         t = strv_join(l, " ");
 378         if (!t)
 379                 return -ENOMEM;
 380
 381         if (!c->syscall_whitelist) {
 382                 char *d;
 383
 384                 d = strappend("~", t);
 385                 if (!d)
 386                         return -ENOMEM;
 387
 388                 free(t);
 389                 t = d;
 390         }
 391
 392         return sd_bus_message_append(reply, "s", t);
 393 }
 394
 395 static int property_get_syscall_errno(
 396                 sd_bus *bus,
 397                 const char *path,
 398                 const char *interface,
 399                 const char *property,
 400                 sd_bus_message *reply,
 401                 void *userdata,
 402                 sd_bus_error *error) {
 403
 404         ExecContext *c = userdata;
 405
 406         assert(bus);
 407         assert(reply);
 408         assert(c);
 409
 410         return sd_bus_message_append(reply, "i", (int32_t) c->syscall_errno);
 411 }
 412
 413 const sd_bus_vtable bus_exec_vtable[] = {
 414         SD_BUS_VTABLE_START(0),
 415         SD_BUS_PROPERTY("Environment", "as", NULL, offsetof(ExecContext, environment), SD_BUS_VTABLE_PROPERTY_CONST),
 416         SD_BUS_PROPERTY("EnvironmentFiles", "a(sb)", property_get_environment_files, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 417         SD_BUS_PROPERTY("UMask", "u", bus_property_get_mode, offsetof(ExecContext, umask), SD_BUS_VTABLE_PROPERTY_CONST),
 418         SD_BUS_PROPERTY("LimitCPU", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_CPU]), SD_BUS_VTABLE_PROPERTY_CONST),
 419         SD_BUS_PROPERTY("LimitFSIZE", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_FSIZE]), SD_BUS_VTABLE_PROPERTY_CONST),
 420         SD_BUS_PROPERTY("LimitDATA", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_DATA]), SD_BUS_VTABLE_PROPERTY_CONST),
 421         SD_BUS_PROPERTY("LimitSTACK", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_STACK]), SD_BUS_VTABLE_PROPERTY_CONST),
 422         SD_BUS_PROPERTY("LimitCORE", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_CORE]), SD_BUS_VTABLE_PROPERTY_CONST),
 423         SD_BUS_PROPERTY("LimitRSS", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_RSS]), SD_BUS_VTABLE_PROPERTY_CONST),
 424         SD_BUS_PROPERTY("LimitNOFILE", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_NOFILE]), SD_BUS_VTABLE_PROPERTY_CONST),
 425         SD_BUS_PROPERTY("LimitAS", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_AS]), SD_BUS_VTABLE_PROPERTY_CONST),
 426         SD_BUS_PROPERTY("LimitNPROC", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_NPROC]), SD_BUS_VTABLE_PROPERTY_CONST),
 427         SD_BUS_PROPERTY("LimitMEMLOCK", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_MEMLOCK]), SD_BUS_VTABLE_PROPERTY_CONST),
 428         SD_BUS_PROPERTY("LimitLOCKS", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_LOCKS]), SD_BUS_VTABLE_PROPERTY_CONST),
 429         SD_BUS_PROPERTY("LimitSIGPENDING", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_SIGPENDING]), SD_BUS_VTABLE_PROPERTY_CONST),
 430         SD_BUS_PROPERTY("LimitMSGQUEUE", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_MSGQUEUE]), SD_BUS_VTABLE_PROPERTY_CONST),
 431         SD_BUS_PROPERTY("LimitNICE", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_NICE]), SD_BUS_VTABLE_PROPERTY_CONST),
 432         SD_BUS_PROPERTY("LimitRTPRIO", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_RTPRIO]), SD_BUS_VTABLE_PROPERTY_CONST),
 433         SD_BUS_PROPERTY("LimitRTTIME", "t", property_get_rlimit, offsetof(ExecContext, rlimit[RLIMIT_RTTIME]), SD_BUS_VTABLE_PROPERTY_CONST),
 434         SD_BUS_PROPERTY("WorkingDirectory", "s", NULL, offsetof(ExecContext, working_directory), SD_BUS_VTABLE_PROPERTY_CONST),
 435         SD_BUS_PROPERTY("RootDirectory", "s", NULL, offsetof(ExecContext, root_directory), SD_BUS_VTABLE_PROPERTY_CONST),
 436         SD_BUS_PROPERTY("OOMScoreAdjust", "i", property_get_oom_score_adjust, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 437         SD_BUS_PROPERTY("Nice", "i", property_get_nice, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 438         SD_BUS_PROPERTY("IOScheduling", "i", property_get_ioprio, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 439         SD_BUS_PROPERTY("CPUSchedulingPolicy", "i", property_get_cpu_sched_policy, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 440         SD_BUS_PROPERTY("CPUSchedulingPriority", "i", property_get_cpu_sched_priority, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 441         SD_BUS_PROPERTY("CPUAffinity", "ay", property_get_cpu_affinity, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 442         SD_BUS_PROPERTY("TimerSlackNSec", "t", property_get_timer_slack_nsec, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 443         SD_BUS_PROPERTY("CPUSchedulingResetOnFork", "b", bus_property_get_bool, offsetof(ExecContext, cpu_sched_reset_on_fork), SD_BUS_VTABLE_PROPERTY_CONST),
 444         SD_BUS_PROPERTY("NonBlocking", "b", bus_property_get_bool, offsetof(ExecContext, non_blocking), SD_BUS_VTABLE_PROPERTY_CONST),
 445         SD_BUS_PROPERTY("StandardInput", "s", property_get_exec_input, offsetof(ExecContext, std_input), SD_BUS_VTABLE_PROPERTY_CONST),
 446         SD_BUS_PROPERTY("StandardOutput", "s", bus_property_get_exec_output, offsetof(ExecContext, std_output), SD_BUS_VTABLE_PROPERTY_CONST),
 447         SD_BUS_PROPERTY("StandardError", "s", bus_property_get_exec_output, offsetof(ExecContext, std_error), SD_BUS_VTABLE_PROPERTY_CONST),
 448         SD_BUS_PROPERTY("TTYPath", "s", NULL, offsetof(ExecContext, tty_path), SD_BUS_VTABLE_PROPERTY_CONST),
 449         SD_BUS_PROPERTY("TTYReset", "b", bus_property_get_bool, offsetof(ExecContext, tty_reset), SD_BUS_VTABLE_PROPERTY_CONST),
 450         SD_BUS_PROPERTY("TTYVHangup", "b", bus_property_get_bool, offsetof(ExecContext, tty_vhangup), SD_BUS_VTABLE_PROPERTY_CONST),
 451         SD_BUS_PROPERTY("TTYVTDisallocate", "b", bus_property_get_bool, offsetof(ExecContext, tty_vt_disallocate), SD_BUS_VTABLE_PROPERTY_CONST),
 452         SD_BUS_PROPERTY("SyslogPriority", "i", bus_property_get_int, offsetof(ExecContext, syslog_priority), SD_BUS_VTABLE_PROPERTY_CONST),
 453         SD_BUS_PROPERTY("SyslogIdentifier", "s", NULL, offsetof(ExecContext, syslog_identifier), SD_BUS_VTABLE_PROPERTY_CONST),
 454         SD_BUS_PROPERTY("SyslogLevelPrefix", "b", bus_property_get_bool, offsetof(ExecContext, syslog_level_prefix), SD_BUS_VTABLE_PROPERTY_CONST),
 455         SD_BUS_PROPERTY("Capabilities", "s", property_get_capabilities, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 456         SD_BUS_PROPERTY("SecureBits", "i", bus_property_get_int, offsetof(ExecContext, secure_bits), SD_BUS_VTABLE_PROPERTY_CONST),
 457         SD_BUS_PROPERTY("CapabilityBoundingSet", "t", property_get_capability_bounding_set, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 458         SD_BUS_PROPERTY("User", "s", NULL, offsetof(ExecContext, user), SD_BUS_VTABLE_PROPERTY_CONST),
 459         SD_BUS_PROPERTY("Group", "s", NULL, offsetof(ExecContext, group), SD_BUS_VTABLE_PROPERTY_CONST),
 460         SD_BUS_PROPERTY("SupplementaryGroups", "as", NULL, offsetof(ExecContext, supplementary_groups), SD_BUS_VTABLE_PROPERTY_CONST),
 461         SD_BUS_PROPERTY("TCPWrapName", "s", NULL, offsetof(ExecContext, tcpwrap_name), SD_BUS_VTABLE_PROPERTY_CONST),
 462         SD_BUS_PROPERTY("PAMName", "s", NULL, offsetof(ExecContext, pam_name), SD_BUS_VTABLE_PROPERTY_CONST),
 463         SD_BUS_PROPERTY("ReadWriteDirectories", "as", NULL, offsetof(ExecContext, read_write_dirs), SD_BUS_VTABLE_PROPERTY_CONST),
 464         SD_BUS_PROPERTY("ReadOnlyDirectories", "as", NULL, offsetof(ExecContext, read_only_dirs), SD_BUS_VTABLE_PROPERTY_CONST),
 465         SD_BUS_PROPERTY("InaccessibleDirectories", "as", NULL, offsetof(ExecContext, inaccessible_dirs), SD_BUS_VTABLE_PROPERTY_CONST),
 466         SD_BUS_PROPERTY("MountFlags", "t", bus_property_get_ulong, offsetof(ExecContext, mount_flags), SD_BUS_VTABLE_PROPERTY_CONST),
 467         SD_BUS_PROPERTY("PrivateTmp", "b", bus_property_get_bool, offsetof(ExecContext, private_tmp), SD_BUS_VTABLE_PROPERTY_CONST),
 468         SD_BUS_PROPERTY("PrivateNetwork", "b", bus_property_get_bool, offsetof(ExecContext, private_network), SD_BUS_VTABLE_PROPERTY_CONST),
 469         SD_BUS_PROPERTY("PrivateDevices", "b", bus_property_get_bool, offsetof(ExecContext, private_devices), SD_BUS_VTABLE_PROPERTY_CONST),
 470         SD_BUS_PROPERTY("SameProcessGroup", "b", bus_property_get_bool, offsetof(ExecContext, same_pgrp), SD_BUS_VTABLE_PROPERTY_CONST),
 471         SD_BUS_PROPERTY("UtmpIdentifier", "s", NULL, offsetof(ExecContext, utmp_id), SD_BUS_VTABLE_PROPERTY_CONST),
 472         SD_BUS_PROPERTY("SELinuxContext", "s", NULL, offsetof(ExecContext, selinux_context), SD_BUS_VTABLE_PROPERTY_CONST),
 473         SD_BUS_PROPERTY("IgnoreSIGPIPE", "b", bus_property_get_bool, offsetof(ExecContext, ignore_sigpipe), SD_BUS_VTABLE_PROPERTY_CONST),
 474         SD_BUS_PROPERTY("NoNewPrivileges", "b", bus_property_get_bool, offsetof(ExecContext, no_new_privileges), SD_BUS_VTABLE_PROPERTY_CONST),
 475         SD_BUS_PROPERTY("SystemCallFilter", "s", property_get_syscall_filter, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 476         SD_BUS_PROPERTY("SystemCallErrorNumber", "i", property_get_syscall_errno, 0, SD_BUS_VTABLE_PROPERTY_CONST),
 477         SD_BUS_VTABLE_END
 478 };
 479
 480 static int append_exec_command(sd_bus_message *reply, ExecCommand *c) {
 481         int r;
 482
 483         assert(reply);
 484         assert(c);
 485
 486         if (!c->path)
 487                 return 0;
 488
 489         r = sd_bus_message_open_container(reply, 'r', "sasbttttuii");
 490         if (r < 0)
 491                 return r;
 492
 493         r = sd_bus_message_append(reply, "s", c->path);
 494         if (r < 0)
 495                 return r;
 496
 497         r = sd_bus_message_append_strv(reply, c->argv);
 498         if (r < 0)
 499                 return r;
 500
 501         r = sd_bus_message_append(reply, "bttttuii",
 502                                   c->ignore,
 503                                   c->exec_status.start_timestamp.realtime,
 504                                   c->exec_status.start_timestamp.monotonic,
 505                                   c->exec_status.exit_timestamp.realtime,
 506                                   c->exec_status.exit_timestamp.monotonic,
 507                                   (uint32_t) c->exec_status.pid,
 508                                   (int32_t) c->exec_status.code,
 509                                   (int32_t) c->exec_status.status);
 510         if (r < 0)
 511                 return r;
 512
 513         return sd_bus_message_close_container(reply);
 514 }
 515
 516 int bus_property_get_exec_command(
 517                 sd_bus *bus,
 518                 const char *path,
 519                 const char *interface,
 520                 const char *property,
 521                 sd_bus_message *reply,
 522                 void *userdata,
 523                 sd_bus_error *ret_error) {
 524
 525         ExecCommand *c = (ExecCommand*) userdata;
 526         int r;
 527
 528         assert(bus);
 529         assert(reply);
 530
 531         r = sd_bus_message_open_container(reply, 'a', "(sasbttttuii)");
 532         if (r < 0)
 533                 return r;
 534
 535         r = append_exec_command(reply, c);
 536         if (r < 0)
 537                 return r;
 538
 539         return sd_bus_message_close_container(reply);
 540 }
 541
 542 int bus_property_get_exec_command_list(
 543                 sd_bus *bus,
 544                 const char *path,
 545                 const char *interface,
 546                 const char *property,
 547                 sd_bus_message *reply,
 548                 void *userdata,
 549                 sd_bus_error *ret_error) {
 550
 551         ExecCommand *c = *(ExecCommand**) userdata;
 552         int r;
 553
 554         assert(bus);
 555         assert(reply);
 556
 557         r = sd_bus_message_open_container(reply, 'a', "(sasbttttuii)");
 558         if (r < 0)
 559                 return r;
 560
 561         LIST_FOREACH(command, c, c) {
 562                 r = append_exec_command(reply, c);
 563                 if (r < 0)
 564                         return r;
 565         }
 566
 567         return sd_bus_message_close_container(reply);
 568 }
 569
 570 int bus_exec_context_set_transient_property(
 571                 Unit *u,
 572                 ExecContext *c,
 573                 const char *name,
 574                 sd_bus_message *message,
 575                 UnitSetPropertiesMode mode,
 576                 sd_bus_error *error) {
 577
 578         int r;
 579
 580         assert(u);
 581         assert(c);
 582         assert(name);
 583         assert(message);
 584
 585         if (streq(name, "User")) {
 586                 const char *uu;
 587
 588                 r = sd_bus_message_read(message, "s", &uu);
 589                 if (r < 0)
 590                         return r;
 591
 592                 if (mode != UNIT_CHECK) {
 593
 594                         if (isempty(uu)) {
 595                                 free(c->user);
 596                                 c->user = NULL;
 597                         } else {
 598                                 char *t;
 599
 600                                 t = strdup(uu);
 601                                 if (!t)
 602                                         return -ENOMEM;
 603
 604                                 free(c->user);
 605                                 c->user = t;
 606                         }
 607
 608                         unit_write_drop_in_private_format(u, mode, name, "User=%s\n", uu);
 609                 }
 610
 611                 return 1;
 612
 613         } else if (streq(name, "Group")) {
 614                 const char *gg;
 615
 616                 r = sd_bus_message_read(message, "s", &gg);
 617                 if (r < 0)
 618                         return r;
 619
 620                 if (mode != UNIT_CHECK) {
 621
 622                         if (isempty(gg)) {
 623                                 free(c->group);
 624                                 c->group = NULL;
 625                         } else {
 626                                 char *t;
 627
 628                                 t = strdup(gg);
 629                                 if (!t)
 630                                         return -ENOMEM;
 631
 632                                 free(c->group);
 633                                 c->group = t;
 634                         }
 635
 636                         unit_write_drop_in_private_format(u, mode, name, "Group=%s\n", gg);
 637                 }
 638
 639                 return 1;
 640
 641         } else if (streq(name, "Nice")) {
 642                 int n;
 643
 644                 r = sd_bus_message_read(message, "i", &n);
 645                 if (r < 0)
 646                         return r;
 647
 648                 if (n < PRIO_MIN || n >= PRIO_MAX)
 649                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Nice value out of range");
 650
 651                 if (mode != UNIT_CHECK) {
 652                         c->nice = n;
 653                         unit_write_drop_in_private_format(u, mode, name, "Nice=%i\n", n);
 654                 }
 655
 656                 return 1;
 657
 658         } else if (streq(name, "Environment")) {
 659
 660                 _cleanup_strv_free_ char **l = NULL;
 661
 662                 r = sd_bus_message_read_strv(message, &l);
 663                 if (r < 0)
 664                         return r;
 665
 666                 if (!strv_env_is_valid(l))
 667                         return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid environment block.");
 668
 669                 if (mode != UNIT_CHECK) {
 670                         _cleanup_free_ char *joined = NULL;
 671                         char **e;
 672
 673                         e = strv_env_merge(2, c->environment, l);
 674                         if (!e)
 675                                 return -ENOMEM;
 676
 677                         strv_free(c->environment);
 678                         c->environment = e;
 679
 680                         joined = strv_join(c->environment, " ");
 681                         if (!joined)
 682                                 return -ENOMEM;
 683
 684                         unit_write_drop_in_private_format(u, mode, name, "Environment=%s\n", joined);
 685                 }
 686
 687                 return 1;
 688         }
 689
 690         return 0;
 691 }