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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
4139c1b2 LP |
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 | |
5430f7f2 LP |
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 | |
4139c1b2 LP |
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 | |
5430f7f2 | 16 | Lesser General Public License for more details. |
4139c1b2 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
4139c1b2 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
22 | #include <errno.h> | |
23 | #include <dbus/dbus.h> | |
82c121a4 | 24 | #include <sys/prctl.h> |
4139c1b2 LP |
25 | |
26 | #include "dbus-execute.h" | |
82c121a4 LP |
27 | #include "missing.h" |
28 | #include "ioprio.h" | |
fe68089d | 29 | #include "strv.h" |
bfebab7f | 30 | #include "dbus-common.h" |
8351ceae | 31 | #include "syscall-list.h" |
a5c32cff | 32 | #include "fileio.h" |
4139c1b2 | 33 | |
4ad49000 LP |
34 | static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_execute_append_input, exec_input, ExecInput); |
35 | static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_execute_append_output, exec_output, ExecOutput); | |
82c121a4 | 36 | |
4ad49000 | 37 | static int bus_execute_append_env_files(DBusMessageIter *i, const char *property, void *data) { |
8c7be95e LP |
38 | char **env_files = data, **j; |
39 | DBusMessageIter sub, sub2; | |
40 | ||
8c7be95e LP |
41 | assert(i); |
42 | assert(property); | |
43 | ||
44 | if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "(sb)", &sub)) | |
45 | return -ENOMEM; | |
46 | ||
47 | STRV_FOREACH(j, env_files) { | |
48 | dbus_bool_t b = false; | |
49 | char *fn = *j; | |
50 | ||
51 | if (fn[0] == '-') { | |
52 | b = true; | |
53 | fn++; | |
54 | } | |
55 | ||
56 | if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) || | |
57 | !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &fn) || | |
58 | !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_BOOLEAN, &b) || | |
59 | !dbus_message_iter_close_container(&sub, &sub2)) | |
60 | return -ENOMEM; | |
61 | } | |
62 | ||
63 | if (!dbus_message_iter_close_container(i, &sub)) | |
64 | return -ENOMEM; | |
65 | ||
66 | return 0; | |
67 | } | |
68 | ||
4ad49000 | 69 | static int bus_execute_append_oom_score_adjust(DBusMessageIter *i, const char *property, void *data) { |
82c121a4 LP |
70 | ExecContext *c = data; |
71 | int32_t n; | |
72 | ||
82c121a4 LP |
73 | assert(i); |
74 | assert(property); | |
75 | assert(c); | |
76 | ||
dd6c17b1 LP |
77 | if (c->oom_score_adjust_set) |
78 | n = c->oom_score_adjust; | |
82c121a4 LP |
79 | else { |
80 | char *t; | |
81 | ||
82 | n = 0; | |
dd6c17b1 | 83 | if (read_one_line_file("/proc/self/oom_score_adj", &t) >= 0) { |
82c121a4 LP |
84 | safe_atoi(t, &n); |
85 | free(t); | |
86 | } | |
87 | } | |
88 | ||
89 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_INT32, &n)) | |
90 | return -ENOMEM; | |
91 | ||
92 | return 0; | |
93 | } | |
94 | ||
4ad49000 | 95 | static int bus_execute_append_nice(DBusMessageIter *i, const char *property, void *data) { |
82c121a4 LP |
96 | ExecContext *c = data; |
97 | int32_t n; | |
98 | ||
82c121a4 LP |
99 | assert(i); |
100 | assert(property); | |
101 | assert(c); | |
102 | ||
103 | if (c->nice_set) | |
104 | n = c->nice; | |
105 | else | |
106 | n = getpriority(PRIO_PROCESS, 0); | |
107 | ||
108 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_INT32, &n)) | |
109 | return -ENOMEM; | |
110 | ||
111 | return 0; | |
112 | } | |
113 | ||
4ad49000 | 114 | static int bus_execute_append_ioprio(DBusMessageIter *i, const char *property, void *data) { |
82c121a4 LP |
115 | ExecContext *c = data; |
116 | int32_t n; | |
117 | ||
82c121a4 LP |
118 | assert(i); |
119 | assert(property); | |
120 | assert(c); | |
121 | ||
122 | if (c->ioprio_set) | |
123 | n = c->ioprio; | |
124 | else | |
125 | n = ioprio_get(IOPRIO_WHO_PROCESS, 0); | |
126 | ||
127 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_INT32, &n)) | |
128 | return -ENOMEM; | |
129 | ||
130 | return 0; | |
131 | } | |
132 | ||
4ad49000 | 133 | static int bus_execute_append_cpu_sched_policy(DBusMessageIter *i, const char *property, void *data) { |
82c121a4 LP |
134 | ExecContext *c = data; |
135 | int32_t n; | |
136 | ||
82c121a4 LP |
137 | assert(i); |
138 | assert(property); | |
139 | assert(c); | |
140 | ||
141 | if (c->cpu_sched_set) | |
142 | n = c->cpu_sched_policy; | |
143 | else | |
144 | n = sched_getscheduler(0); | |
145 | ||
146 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_INT32, &n)) | |
147 | return -ENOMEM; | |
148 | ||
149 | return 0; | |
150 | } | |
151 | ||
4ad49000 | 152 | static int bus_execute_append_cpu_sched_priority(DBusMessageIter *i, const char *property, void *data) { |
82c121a4 LP |
153 | ExecContext *c = data; |
154 | int32_t n; | |
155 | ||
82c121a4 LP |
156 | assert(i); |
157 | assert(property); | |
158 | assert(c); | |
159 | ||
160 | if (c->cpu_sched_set) | |
161 | n = c->cpu_sched_priority; | |
162 | else { | |
b92bea5d | 163 | struct sched_param p = {}; |
82c121a4 | 164 | |
82c121a4 LP |
165 | if (sched_getparam(0, &p) >= 0) |
166 | n = p.sched_priority; | |
e62d8c39 ZJS |
167 | else |
168 | n = 0; | |
82c121a4 LP |
169 | } |
170 | ||
171 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_INT32, &n)) | |
172 | return -ENOMEM; | |
173 | ||
174 | return 0; | |
175 | } | |
176 | ||
4ad49000 | 177 | static int bus_execute_append_affinity(DBusMessageIter *i, const char *property, void *data) { |
82c121a4 LP |
178 | ExecContext *c = data; |
179 | dbus_bool_t b; | |
180 | DBusMessageIter sub; | |
181 | ||
82c121a4 LP |
182 | assert(i); |
183 | assert(property); | |
184 | assert(c); | |
185 | ||
fe68089d | 186 | if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "y", &sub)) |
82c121a4 LP |
187 | return -ENOMEM; |
188 | ||
189 | if (c->cpuset) | |
190 | b = dbus_message_iter_append_fixed_array(&sub, DBUS_TYPE_BYTE, &c->cpuset, CPU_ALLOC_SIZE(c->cpuset_ncpus)); | |
191 | else | |
192 | b = dbus_message_iter_append_fixed_array(&sub, DBUS_TYPE_BYTE, &c->cpuset, 0); | |
193 | ||
194 | if (!b) | |
195 | return -ENOMEM; | |
196 | ||
197 | if (!dbus_message_iter_close_container(i, &sub)) | |
198 | return -ENOMEM; | |
199 | ||
200 | return 0; | |
201 | } | |
202 | ||
4ad49000 | 203 | static int bus_execute_append_timer_slack_nsec(DBusMessageIter *i, const char *property, void *data) { |
82c121a4 LP |
204 | ExecContext *c = data; |
205 | uint64_t u; | |
206 | ||
82c121a4 LP |
207 | assert(i); |
208 | assert(property); | |
209 | assert(c); | |
210 | ||
d88a251b | 211 | if (c->timer_slack_nsec != (nsec_t) -1) |
03fae018 | 212 | u = (uint64_t) c->timer_slack_nsec; |
82c121a4 LP |
213 | else |
214 | u = (uint64_t) prctl(PR_GET_TIMERSLACK); | |
215 | ||
216 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u)) | |
217 | return -ENOMEM; | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
4ad49000 | 222 | static int bus_execute_append_capability_bs(DBusMessageIter *i, const char *property, void *data) { |
260abb78 LP |
223 | ExecContext *c = data; |
224 | uint64_t normal, inverted; | |
225 | ||
260abb78 LP |
226 | assert(i); |
227 | assert(property); | |
228 | assert(c); | |
229 | ||
7c3d67ef | 230 | /* We store this negated internally, to match the kernel, but |
260abb78 LP |
231 | * we expose it normalized. */ |
232 | ||
233 | normal = *(uint64_t*) data; | |
234 | inverted = ~normal; | |
235 | ||
bfebab7f | 236 | return bus_property_append_uint64(i, property, &inverted); |
260abb78 LP |
237 | } |
238 | ||
4ad49000 | 239 | static int bus_execute_append_capabilities(DBusMessageIter *i, const char *property, void *data) { |
82c121a4 LP |
240 | ExecContext *c = data; |
241 | char *t = NULL; | |
242 | const char *s; | |
243 | dbus_bool_t b; | |
244 | ||
82c121a4 LP |
245 | assert(i); |
246 | assert(property); | |
247 | assert(c); | |
248 | ||
249 | if (c->capabilities) | |
250 | s = t = cap_to_text(c->capabilities, NULL); | |
251 | else | |
252 | s = ""; | |
253 | ||
674cdd19 | 254 | if (!s) |
82c121a4 LP |
255 | return -ENOMEM; |
256 | ||
257 | b = dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &s); | |
674cdd19 LP |
258 | |
259 | if (t) | |
260 | cap_free(t); | |
82c121a4 LP |
261 | |
262 | if (!b) | |
263 | return -ENOMEM; | |
264 | ||
265 | return 0; | |
266 | } | |
267 | ||
4ad49000 | 268 | static int bus_execute_append_rlimits(DBusMessageIter *i, const char *property, void *data) { |
82c121a4 LP |
269 | ExecContext *c = data; |
270 | int r; | |
271 | uint64_t u; | |
272 | ||
82c121a4 LP |
273 | assert(i); |
274 | assert(property); | |
275 | assert(c); | |
276 | ||
277 | assert_se((r = rlimit_from_string(property)) >= 0); | |
278 | ||
279 | if (c->rlimit[r]) | |
280 | u = (uint64_t) c->rlimit[r]->rlim_max; | |
281 | else { | |
b92bea5d | 282 | struct rlimit rl = {}; |
82c121a4 | 283 | |
82c121a4 LP |
284 | getrlimit(r, &rl); |
285 | ||
286 | u = (uint64_t) rl.rlim_max; | |
287 | } | |
288 | ||
289 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u)) | |
290 | return -ENOMEM; | |
291 | ||
292 | return 0; | |
293 | } | |
fe68089d | 294 | |
bfebab7f | 295 | int bus_execute_append_command(DBusMessageIter *i, const char *property, void *data) { |
fe68089d LP |
296 | ExecCommand *c = data; |
297 | DBusMessageIter sub, sub2, sub3; | |
298 | ||
fe68089d LP |
299 | assert(i); |
300 | assert(property); | |
301 | ||
7daa9e6e | 302 | if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "(sasbttttuii)", &sub)) |
fe68089d LP |
303 | return -ENOMEM; |
304 | ||
305 | LIST_FOREACH(command, c, c) { | |
306 | char **l; | |
307 | uint32_t pid; | |
308 | int32_t code, status; | |
7daa9e6e | 309 | dbus_bool_t b; |
fe68089d LP |
310 | |
311 | if (!c->path) | |
312 | continue; | |
313 | ||
314 | if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) || | |
315 | !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &c->path) || | |
316 | !dbus_message_iter_open_container(&sub2, DBUS_TYPE_ARRAY, "s", &sub3)) | |
317 | return -ENOMEM; | |
318 | ||
319 | STRV_FOREACH(l, c->argv) | |
320 | if (!dbus_message_iter_append_basic(&sub3, DBUS_TYPE_STRING, l)) | |
321 | return -ENOMEM; | |
322 | ||
323 | pid = (uint32_t) c->exec_status.pid; | |
324 | code = (int32_t) c->exec_status.code; | |
325 | status = (int32_t) c->exec_status.status; | |
326 | ||
7daa9e6e LP |
327 | b = !!c->ignore; |
328 | ||
fe68089d | 329 | if (!dbus_message_iter_close_container(&sub2, &sub3) || |
7daa9e6e | 330 | !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_BOOLEAN, &b) || |
fe68089d | 331 | !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT64, &c->exec_status.start_timestamp.realtime) || |
b21a0ef8 | 332 | !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT64, &c->exec_status.start_timestamp.monotonic) || |
fe68089d | 333 | !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT64, &c->exec_status.exit_timestamp.realtime) || |
b21a0ef8 | 334 | !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT64, &c->exec_status.exit_timestamp.monotonic) || |
e364ad06 LP |
335 | !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &pid) || |
336 | !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_INT32, &code) || | |
337 | !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_INT32, &status)) | |
fe68089d LP |
338 | return -ENOMEM; |
339 | ||
340 | if (!dbus_message_iter_close_container(&sub, &sub2)) | |
341 | return -ENOMEM; | |
342 | } | |
343 | ||
344 | if (!dbus_message_iter_close_container(i, &sub)) | |
345 | return -ENOMEM; | |
346 | ||
347 | return 0; | |
348 | } | |
d200735e | 349 | |
4ad49000 | 350 | static int bus_execute_append_syscall_filter(DBusMessageIter *i, const char *property, void *data) { |
8351ceae LP |
351 | ExecContext *c = data; |
352 | dbus_bool_t b; | |
353 | DBusMessageIter sub; | |
354 | ||
355 | assert(i); | |
356 | assert(property); | |
357 | assert(c); | |
358 | ||
359 | if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "u", &sub)) | |
360 | return -ENOMEM; | |
361 | ||
362 | if (c->syscall_filter) | |
363 | b = dbus_message_iter_append_fixed_array(&sub, DBUS_TYPE_UINT32, &c->syscall_filter, (syscall_max() + 31) >> 4); | |
364 | else | |
365 | b = dbus_message_iter_append_fixed_array(&sub, DBUS_TYPE_UINT32, &c->syscall_filter, 0); | |
366 | ||
367 | if (!b) | |
368 | return -ENOMEM; | |
369 | ||
370 | if (!dbus_message_iter_close_container(i, &sub)) | |
371 | return -ENOMEM; | |
372 | ||
373 | return 0; | |
374 | } | |
375 | ||
d200735e MS |
376 | const BusProperty bus_exec_context_properties[] = { |
377 | { "Environment", bus_property_append_strv, "as", offsetof(ExecContext, environment), true }, | |
378 | { "EnvironmentFiles", bus_execute_append_env_files, "a(sb)", offsetof(ExecContext, environment_files), true }, | |
379 | { "UMask", bus_property_append_mode, "u", offsetof(ExecContext, umask) }, | |
380 | { "LimitCPU", bus_execute_append_rlimits, "t", 0 }, | |
381 | { "LimitFSIZE", bus_execute_append_rlimits, "t", 0 }, | |
382 | { "LimitDATA", bus_execute_append_rlimits, "t", 0 }, | |
383 | { "LimitSTACK", bus_execute_append_rlimits, "t", 0 }, | |
384 | { "LimitCORE", bus_execute_append_rlimits, "t", 0 }, | |
385 | { "LimitRSS", bus_execute_append_rlimits, "t", 0 }, | |
386 | { "LimitNOFILE", bus_execute_append_rlimits, "t", 0 }, | |
387 | { "LimitAS", bus_execute_append_rlimits, "t", 0 }, | |
388 | { "LimitNPROC", bus_execute_append_rlimits, "t", 0 }, | |
389 | { "LimitMEMLOCK", bus_execute_append_rlimits, "t", 0 }, | |
390 | { "LimitLOCKS", bus_execute_append_rlimits, "t", 0 }, | |
391 | { "LimitSIGPENDING", bus_execute_append_rlimits, "t", 0 }, | |
392 | { "LimitMSGQUEUE", bus_execute_append_rlimits, "t", 0 }, | |
393 | { "LimitNICE", bus_execute_append_rlimits, "t", 0 }, | |
394 | { "LimitRTPRIO", bus_execute_append_rlimits, "t", 0 }, | |
395 | { "LimitRTTIME", bus_execute_append_rlimits, "t", 0 }, | |
396 | { "WorkingDirectory", bus_property_append_string, "s", offsetof(ExecContext, working_directory), true }, | |
397 | { "RootDirectory", bus_property_append_string, "s", offsetof(ExecContext, root_directory), true }, | |
398 | { "OOMScoreAdjust", bus_execute_append_oom_score_adjust, "i", 0 }, | |
399 | { "Nice", bus_execute_append_nice, "i", 0 }, | |
400 | { "IOScheduling", bus_execute_append_ioprio, "i", 0 }, | |
401 | { "CPUSchedulingPolicy", bus_execute_append_cpu_sched_policy, "i", 0 }, | |
402 | { "CPUSchedulingPriority", bus_execute_append_cpu_sched_priority, "i", 0 }, | |
403 | { "CPUAffinity", bus_execute_append_affinity, "ay", 0 }, | |
404 | { "TimerSlackNSec", bus_execute_append_timer_slack_nsec, "t", 0 }, | |
405 | { "CPUSchedulingResetOnFork", bus_property_append_bool, "b", offsetof(ExecContext, cpu_sched_reset_on_fork) }, | |
406 | { "NonBlocking", bus_property_append_bool, "b", offsetof(ExecContext, non_blocking) }, | |
407 | { "StandardInput", bus_execute_append_input, "s", offsetof(ExecContext, std_input) }, | |
408 | { "StandardOutput", bus_execute_append_output, "s", offsetof(ExecContext, std_output) }, | |
409 | { "StandardError", bus_execute_append_output, "s", offsetof(ExecContext, std_error) }, | |
410 | { "TTYPath", bus_property_append_string, "s", offsetof(ExecContext, tty_path), true }, | |
411 | { "TTYReset", bus_property_append_bool, "b", offsetof(ExecContext, tty_reset) }, | |
412 | { "TTYVHangup", bus_property_append_bool, "b", offsetof(ExecContext, tty_vhangup) }, | |
413 | { "TTYVTDisallocate", bus_property_append_bool, "b", offsetof(ExecContext, tty_vt_disallocate) }, | |
414 | { "SyslogPriority", bus_property_append_int, "i", offsetof(ExecContext, syslog_priority) }, | |
415 | { "SyslogIdentifier", bus_property_append_string, "s", offsetof(ExecContext, syslog_identifier), true }, | |
416 | { "SyslogLevelPrefix", bus_property_append_bool, "b", offsetof(ExecContext, syslog_level_prefix) }, | |
417 | { "Capabilities", bus_execute_append_capabilities, "s", 0 }, | |
418 | { "SecureBits", bus_property_append_int, "i", offsetof(ExecContext, secure_bits) }, | |
419 | { "CapabilityBoundingSet", bus_execute_append_capability_bs, "t", offsetof(ExecContext, capability_bounding_set_drop) }, | |
420 | { "User", bus_property_append_string, "s", offsetof(ExecContext, user), true }, | |
421 | { "Group", bus_property_append_string, "s", offsetof(ExecContext, group), true }, | |
422 | { "SupplementaryGroups", bus_property_append_strv, "as", offsetof(ExecContext, supplementary_groups), true }, | |
423 | { "TCPWrapName", bus_property_append_string, "s", offsetof(ExecContext, tcpwrap_name), true }, | |
424 | { "PAMName", bus_property_append_string, "s", offsetof(ExecContext, pam_name), true }, | |
425 | { "ReadWriteDirectories", bus_property_append_strv, "as", offsetof(ExecContext, read_write_dirs), true }, | |
426 | { "ReadOnlyDirectories", bus_property_append_strv, "as", offsetof(ExecContext, read_only_dirs), true }, | |
427 | { "InaccessibleDirectories", bus_property_append_strv, "as", offsetof(ExecContext, inaccessible_dirs), true }, | |
428 | { "MountFlags", bus_property_append_ul, "t", offsetof(ExecContext, mount_flags) }, | |
429 | { "PrivateTmp", bus_property_append_bool, "b", offsetof(ExecContext, private_tmp) }, | |
430 | { "PrivateNetwork", bus_property_append_bool, "b", offsetof(ExecContext, private_network) }, | |
431 | { "SameProcessGroup", bus_property_append_bool, "b", offsetof(ExecContext, same_pgrp) }, | |
d200735e | 432 | { "UtmpIdentifier", bus_property_append_string, "s", offsetof(ExecContext, utmp_id), true }, |
8351ceae LP |
433 | { "IgnoreSIGPIPE", bus_property_append_bool, "b", offsetof(ExecContext, ignore_sigpipe) }, |
434 | { "NoNewPrivileges", bus_property_append_bool, "b", offsetof(ExecContext, no_new_privileges) }, | |
435 | { "SystemCallFilter", bus_execute_append_syscall_filter, "au", 0 }, | |
4ad49000 | 436 | {} |
d200735e | 437 | }; |