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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
c2f1db8f | 2 | #pragma once |
5cb5a6ff | 3 | |
a7334b09 LP |
4 | /*** |
5 | This file is part of systemd. | |
6 | ||
7 | Copyright 2010 Lennart Poettering | |
8 | ||
9 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
10 | under the terms of the GNU Lesser General Public License as published by |
11 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
12 | (at your option) any later version. |
13 | ||
14 | systemd is distributed in the hope that it will be useful, but | |
15 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 17 | Lesser General Public License for more details. |
a7334b09 | 18 | |
5430f7f2 | 19 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
20 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
21 | ***/ | |
22 | ||
5cb5a6ff LP |
23 | typedef struct ExecStatus ExecStatus; |
24 | typedef struct ExecCommand ExecCommand; | |
25 | typedef struct ExecContext ExecContext; | |
613b411c | 26 | typedef struct ExecRuntime ExecRuntime; |
9fa95f85 | 27 | typedef struct ExecParameters ExecParameters; |
5cb5a6ff | 28 | |
71d35b6b | 29 | #include <sched.h> |
5cb5a6ff LP |
30 | #include <stdbool.h> |
31 | #include <stdio.h> | |
71d35b6b | 32 | #include <sys/capability.h> |
5cb5a6ff | 33 | |
9ce93478 | 34 | #include "cgroup-util.h" |
613b411c | 35 | #include "fdset.h" |
71d35b6b | 36 | #include "list.h" |
517d56b1 | 37 | #include "missing.h" |
417116f2 | 38 | #include "namespace.h" |
add00535 | 39 | #include "nsflags.h" |
5cb5a6ff | 40 | |
023a4f67 LP |
41 | typedef enum ExecUtmpMode { |
42 | EXEC_UTMP_INIT, | |
43 | EXEC_UTMP_LOGIN, | |
44 | EXEC_UTMP_USER, | |
45 | _EXEC_UTMP_MODE_MAX, | |
2307f37e | 46 | _EXEC_UTMP_MODE_INVALID = -1 |
023a4f67 LP |
47 | } ExecUtmpMode; |
48 | ||
80876c20 LP |
49 | typedef enum ExecInput { |
50 | EXEC_INPUT_NULL, | |
51 | EXEC_INPUT_TTY, | |
52 | EXEC_INPUT_TTY_FORCE, | |
53 | EXEC_INPUT_TTY_FAIL, | |
4f2d528d | 54 | EXEC_INPUT_SOCKET, |
52c239d7 | 55 | EXEC_INPUT_NAMED_FD, |
80876c20 LP |
56 | _EXEC_INPUT_MAX, |
57 | _EXEC_INPUT_INVALID = -1 | |
58 | } ExecInput; | |
59 | ||
071830ff | 60 | typedef enum ExecOutput { |
80876c20 | 61 | EXEC_OUTPUT_INHERIT, |
94f04347 | 62 | EXEC_OUTPUT_NULL, |
80876c20 | 63 | EXEC_OUTPUT_TTY, |
94f04347 | 64 | EXEC_OUTPUT_SYSLOG, |
28dbc1e8 | 65 | EXEC_OUTPUT_SYSLOG_AND_CONSOLE, |
9a6bca7a | 66 | EXEC_OUTPUT_KMSG, |
28dbc1e8 | 67 | EXEC_OUTPUT_KMSG_AND_CONSOLE, |
706343f4 LP |
68 | EXEC_OUTPUT_JOURNAL, |
69 | EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
4f2d528d | 70 | EXEC_OUTPUT_SOCKET, |
52c239d7 | 71 | EXEC_OUTPUT_NAMED_FD, |
94f04347 LP |
72 | _EXEC_OUTPUT_MAX, |
73 | _EXEC_OUTPUT_INVALID = -1 | |
071830ff LP |
74 | } ExecOutput; |
75 | ||
53f47dfc YW |
76 | typedef enum ExecPreserveMode { |
77 | EXEC_PRESERVE_NO, | |
78 | EXEC_PRESERVE_YES, | |
79 | EXEC_PRESERVE_RESTART, | |
80 | _EXEC_PRESERVE_MODE_MAX, | |
81 | _EXEC_PRESERVE_MODE_INVALID = -1 | |
82 | } ExecPreserveMode; | |
83 | ||
b1edf445 LP |
84 | typedef enum ExecKeyringMode { |
85 | EXEC_KEYRING_INHERIT, | |
86 | EXEC_KEYRING_PRIVATE, | |
87 | EXEC_KEYRING_SHARED, | |
88 | _EXEC_KEYRING_MODE_MAX, | |
89 | _EXEC_KEYRING_MODE_INVALID = -1, | |
90 | } ExecKeyringMode; | |
91 | ||
5cb5a6ff | 92 | struct ExecStatus { |
63983207 LP |
93 | dual_timestamp start_timestamp; |
94 | dual_timestamp exit_timestamp; | |
9d58f1db | 95 | pid_t pid; |
9152c765 LP |
96 | int code; /* as in siginfo_t::si_code */ |
97 | int status; /* as in sigingo_t::si_status */ | |
5cb5a6ff LP |
98 | }; |
99 | ||
3ed0cd26 LP |
100 | typedef enum ExecCommandFlags { |
101 | EXEC_COMMAND_IGNORE_FAILURE = 1, | |
102 | EXEC_COMMAND_FULLY_PRIVILEGED = 2, | |
165a31c0 LP |
103 | EXEC_COMMAND_NO_SETUID = 4, |
104 | EXEC_COMMAND_AMBIENT_MAGIC = 8, | |
3ed0cd26 LP |
105 | } ExecCommandFlags; |
106 | ||
5cb5a6ff LP |
107 | struct ExecCommand { |
108 | char *path; | |
109 | char **argv; | |
034c6ed7 | 110 | ExecStatus exec_status; |
3ed0cd26 | 111 | ExecCommandFlags flags; |
034c6ed7 | 112 | LIST_FIELDS(ExecCommand, command); /* useful for chaining commands */ |
5cb5a6ff LP |
113 | }; |
114 | ||
613b411c LP |
115 | struct ExecRuntime { |
116 | int n_ref; | |
117 | ||
118 | char *tmp_dir; | |
119 | char *var_tmp_dir; | |
120 | ||
29206d46 LP |
121 | /* An AF_UNIX socket pair, that contains a datagram containing a file descriptor referring to the network |
122 | * namespace. */ | |
613b411c LP |
123 | int netns_storage_socket[2]; |
124 | }; | |
125 | ||
3536f49e YW |
126 | typedef enum ExecDirectoryType { |
127 | EXEC_DIRECTORY_RUNTIME = 0, | |
128 | EXEC_DIRECTORY_STATE, | |
129 | EXEC_DIRECTORY_CACHE, | |
130 | EXEC_DIRECTORY_LOGS, | |
131 | EXEC_DIRECTORY_CONFIGURATION, | |
72fd1768 LP |
132 | _EXEC_DIRECTORY_TYPE_MAX, |
133 | _EXEC_DIRECTORY_TYPE_INVALID = -1, | |
3536f49e YW |
134 | } ExecDirectoryType; |
135 | ||
136 | typedef struct ExecDirectory { | |
137 | char **paths; | |
138 | mode_t mode; | |
139 | } ExecDirectory; | |
140 | ||
5cb5a6ff LP |
141 | struct ExecContext { |
142 | char **environment; | |
8c7be95e | 143 | char **environment_files; |
b4c14404 | 144 | char **pass_environment; |
00819cc1 | 145 | char **unset_environment; |
8c7be95e | 146 | |
517d56b1 | 147 | struct rlimit *rlimit[_RLIMIT_MAX]; |
915e6d16 | 148 | char *working_directory, *root_directory, *root_image; |
4c08c824 | 149 | bool working_directory_missing_ok; |
5f5d8eab | 150 | bool working_directory_home; |
9d58f1db LP |
151 | |
152 | mode_t umask; | |
dd6c17b1 | 153 | int oom_score_adjust; |
5cb5a6ff | 154 | int nice; |
9eba9da4 | 155 | int ioprio; |
94f04347 LP |
156 | int cpu_sched_policy; |
157 | int cpu_sched_priority; | |
9d58f1db | 158 | |
82c121a4 LP |
159 | cpu_set_t *cpuset; |
160 | unsigned cpuset_ncpus; | |
fb33a393 | 161 | |
80876c20 LP |
162 | ExecInput std_input; |
163 | ExecOutput std_output; | |
164 | ExecOutput std_error; | |
52c239d7 | 165 | char *stdio_fdname[3]; |
80876c20 | 166 | |
d88a251b | 167 | nsec_t timer_slack_nsec; |
071830ff | 168 | |
1e22b5cd LP |
169 | bool stdio_as_fds; |
170 | ||
9d58f1db | 171 | char *tty_path; |
5cb5a6ff | 172 | |
6ea832a2 LP |
173 | bool tty_reset; |
174 | bool tty_vhangup; | |
175 | bool tty_vt_disallocate; | |
176 | ||
353e12c2 LP |
177 | bool ignore_sigpipe; |
178 | ||
61233823 | 179 | /* Since resolving these names might involve socket |
5cb5a6ff | 180 | * connections and we don't want to deadlock ourselves these |
94f04347 LP |
181 | * names are resolved on execution only and in the child |
182 | * process. */ | |
5cb5a6ff LP |
183 | char *user; |
184 | char *group; | |
185 | char **supplementary_groups; | |
9d58f1db | 186 | |
5b6319dc LP |
187 | char *pam_name; |
188 | ||
169c1bda | 189 | char *utmp_id; |
023a4f67 | 190 | ExecUtmpMode utmp_mode; |
169c1bda | 191 | |
5f8640fb | 192 | bool selinux_context_ignore; |
7b52a628 MS |
193 | char *selinux_context; |
194 | ||
eef65bf3 MS |
195 | bool apparmor_profile_ignore; |
196 | char *apparmor_profile; | |
197 | ||
2ca620c4 WC |
198 | bool smack_process_label_ignore; |
199 | char *smack_process_label; | |
200 | ||
b1edf445 LP |
201 | ExecKeyringMode keyring_mode; |
202 | ||
2a624c36 | 203 | char **read_write_paths, **read_only_paths, **inaccessible_paths; |
15ae422b | 204 | unsigned long mount_flags; |
d2d6c096 LP |
205 | BindMount *bind_mounts; |
206 | unsigned n_bind_mounts; | |
15ae422b | 207 | |
a103496c | 208 | uint64_t capability_bounding_set; |
755d4b67 | 209 | uint64_t capability_ambient_set; |
9d58f1db LP |
210 | int secure_bits; |
211 | ||
7fab9d01 LP |
212 | int syslog_priority; |
213 | char *syslog_identifier; | |
214 | bool syslog_level_prefix; | |
215 | ||
d3070fbd LP |
216 | int log_level_max; |
217 | ||
218 | struct iovec* log_extra_fields; | |
219 | size_t n_log_extra_fields; | |
220 | ||
9d58f1db LP |
221 | bool cpu_sched_reset_on_fork; |
222 | bool non_blocking; | |
15ae422b | 223 | bool private_tmp; |
ff01d048 | 224 | bool private_network; |
7f112f50 | 225 | bool private_devices; |
d251207d | 226 | bool private_users; |
1b8689f9 LP |
227 | ProtectSystem protect_system; |
228 | ProtectHome protect_home; | |
59eeb84b | 229 | bool protect_kernel_tunables; |
502d704e | 230 | bool protect_kernel_modules; |
59eeb84b | 231 | bool protect_control_groups; |
5d997827 | 232 | bool mount_apivfs; |
9d58f1db | 233 | |
8351ceae LP |
234 | bool no_new_privileges; |
235 | ||
29206d46 | 236 | bool dynamic_user; |
00d9ef85 | 237 | bool remove_ipc; |
29206d46 | 238 | |
9d58f1db LP |
239 | /* This is not exposed to the user but available |
240 | * internally. We need it to make sure that whenever we spawn | |
f00929ad | 241 | * /usr/bin/mount it is run in the same process group as us so |
9d58f1db LP |
242 | * that the autofs logic detects that it belongs to us and we |
243 | * don't enter a trigger loop. */ | |
74922904 | 244 | bool same_pgrp; |
2e22afe9 | 245 | |
ac45f971 | 246 | unsigned long personality; |
78e864e5 | 247 | bool lock_personality; |
ac45f971 | 248 | |
add00535 LP |
249 | unsigned long restrict_namespaces; /* The CLONE_NEWxyz flags permitted to the unit's processes */ |
250 | ||
8cfa775f | 251 | Hashmap *syscall_filter; |
57183d11 | 252 | Set *syscall_archs; |
17df7223 LP |
253 | int syscall_errno; |
254 | bool syscall_whitelist:1; | |
8351ceae | 255 | |
4298d0b5 LP |
256 | Set *address_families; |
257 | bool address_families_whitelist:1; | |
258 | ||
53f47dfc | 259 | ExecPreserveMode runtime_directory_preserve_mode; |
72fd1768 | 260 | ExecDirectory directories[_EXEC_DIRECTORY_TYPE_MAX]; |
e66cf1a3 | 261 | |
f4170c67 LP |
262 | bool memory_deny_write_execute; |
263 | bool restrict_realtime; | |
264 | ||
dd6c17b1 | 265 | bool oom_score_adjust_set:1; |
7fab9d01 LP |
266 | bool nice_set:1; |
267 | bool ioprio_set:1; | |
268 | bool cpu_sched_set:1; | |
5cb5a6ff LP |
269 | }; |
270 | ||
add00535 LP |
271 | static inline bool exec_context_restrict_namespaces_set(const ExecContext *c) { |
272 | assert(c); | |
273 | ||
274 | return (c->restrict_namespaces & NAMESPACE_FLAGS_ALL) != NAMESPACE_FLAGS_ALL; | |
275 | } | |
276 | ||
c39f1ce2 | 277 | typedef enum ExecFlags { |
1703fa41 | 278 | EXEC_APPLY_SANDBOXING = 1U << 0, |
7d5ceb64 FB |
279 | EXEC_APPLY_CHROOT = 1U << 1, |
280 | EXEC_APPLY_TTY_STDIN = 1U << 2, | |
74dd6b51 | 281 | EXEC_NEW_KEYRING = 1U << 3, |
af635cf3 | 282 | EXEC_PASS_LOG_UNIT = 1U << 4, /* Whether to pass the unit name to the service's journal stream connection */ |
8679efde | 283 | EXEC_CHOWN_DIRECTORIES = 1U << 5, /* chown() the runtime/state/cache/log directories to the user we run as, under all conditions */ |
ac647978 | 284 | EXEC_NSS_BYPASS_BUS = 1U << 6, /* Set the SYSTEMD_NSS_BYPASS_BUS environment variable, to disable nss-systemd for dbus */ |
584b8688 | 285 | EXEC_CGROUP_DELEGATE = 1U << 7, |
c39f1ce2 | 286 | |
9c1a61ad | 287 | /* The following are not used by execute.c, but by consumers internally */ |
584b8688 LP |
288 | EXEC_PASS_FDS = 1U << 8, |
289 | EXEC_IS_CONTROL = 1U << 9, | |
290 | EXEC_SETENV_RESULT = 1U << 10, | |
291 | EXEC_SET_WATCHDOG = 1U << 11, | |
c39f1ce2 LP |
292 | } ExecFlags; |
293 | ||
9fa95f85 DM |
294 | struct ExecParameters { |
295 | char **argv; | |
a34ceba6 | 296 | char **environment; |
8dd4c05b LP |
297 | |
298 | int *fds; | |
299 | char **fd_names; | |
4c47affc | 300 | unsigned n_storage_fds; |
9b141911 | 301 | unsigned n_socket_fds; |
8dd4c05b | 302 | |
c39f1ce2 | 303 | ExecFlags flags; |
a34ceba6 | 304 | bool selinux_context_net:1; |
8dd4c05b | 305 | |
efdb0237 | 306 | CGroupMask cgroup_supported; |
9fa95f85 | 307 | const char *cgroup_path; |
8dd4c05b | 308 | |
3536f49e | 309 | char **prefix; |
8dd4c05b | 310 | |
7d5ceb64 FB |
311 | const char *confirm_spawn; |
312 | ||
9fa95f85 | 313 | usec_t watchdog_usec; |
8dd4c05b | 314 | |
9fa95f85 | 315 | int *idle_pipe; |
8dd4c05b | 316 | |
a34ceba6 LP |
317 | int stdin_fd; |
318 | int stdout_fd; | |
319 | int stderr_fd; | |
9fa95f85 DM |
320 | }; |
321 | ||
9ce93478 | 322 | #include "unit.h" |
29206d46 | 323 | #include "dynamic-user.h" |
9ce93478 | 324 | |
f2341e0a LP |
325 | int exec_spawn(Unit *unit, |
326 | ExecCommand *command, | |
9fa95f85 DM |
327 | const ExecContext *context, |
328 | const ExecParameters *exec_params, | |
613b411c | 329 | ExecRuntime *runtime, |
29206d46 | 330 | DynamicCreds *dynamic_creds, |
81a2b7ce | 331 | pid_t *ret); |
5cb5a6ff | 332 | |
43d0fcbd LP |
333 | void exec_command_done(ExecCommand *c); |
334 | void exec_command_done_array(ExecCommand *c, unsigned n); | |
335 | ||
f1acf85a | 336 | ExecCommand* exec_command_free_list(ExecCommand *c); |
034c6ed7 | 337 | void exec_command_free_array(ExecCommand **c, unsigned n); |
5cb5a6ff | 338 | |
9e2f7c11 LP |
339 | char *exec_command_line(char **argv); |
340 | ||
44d8db9e LP |
341 | void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix); |
342 | void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix); | |
a6a80b4f | 343 | void exec_command_append_list(ExecCommand **l, ExecCommand *e); |
26fd040d | 344 | int exec_command_set(ExecCommand *c, const char *path, ...); |
86b23b07 | 345 | int exec_command_append(ExecCommand *c, const char *path, ...); |
44d8db9e | 346 | |
034c6ed7 | 347 | void exec_context_init(ExecContext *c); |
613b411c | 348 | void exec_context_done(ExecContext *c); |
5cb5a6ff LP |
349 | void exec_context_dump(ExecContext *c, FILE* f, const char *prefix); |
350 | ||
e66cf1a3 LP |
351 | int exec_context_destroy_runtime_directory(ExecContext *c, const char *runtime_root); |
352 | ||
f2341e0a | 353 | int exec_context_load_environment(Unit *unit, const ExecContext *c, char ***l); |
52c239d7 LB |
354 | int exec_context_named_iofds(Unit *unit, const ExecContext *c, const ExecParameters *p, int named_iofds[3]); |
355 | const char* exec_context_fdname(const ExecContext *c, int fd_index); | |
8c7be95e | 356 | |
6ac8fdc9 | 357 | bool exec_context_may_touch_console(ExecContext *c); |
a931ad47 | 358 | bool exec_context_maintains_privileges(ExecContext *c); |
6ac8fdc9 | 359 | |
7f452159 LP |
360 | int exec_context_get_effective_ioprio(ExecContext *c); |
361 | ||
d3070fbd LP |
362 | void exec_context_free_log_extra_fields(ExecContext *c); |
363 | ||
b58b4116 | 364 | void exec_status_start(ExecStatus *s, pid_t pid); |
6ea832a2 | 365 | void exec_status_exit(ExecStatus *s, ExecContext *context, pid_t pid, int code, int status); |
9fb86720 | 366 | void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix); |
5cb5a6ff | 367 | |
613b411c LP |
368 | int exec_runtime_make(ExecRuntime **rt, ExecContext *c, const char *id); |
369 | ExecRuntime *exec_runtime_ref(ExecRuntime *r); | |
370 | ExecRuntime *exec_runtime_unref(ExecRuntime *r); | |
371 | ||
f2341e0a LP |
372 | int exec_runtime_serialize(Unit *unit, ExecRuntime *rt, FILE *f, FDSet *fds); |
373 | int exec_runtime_deserialize_item(Unit *unit, ExecRuntime **rt, const char *key, const char *value, FDSet *fds); | |
613b411c LP |
374 | |
375 | void exec_runtime_destroy(ExecRuntime *rt); | |
376 | ||
44a6b1b6 ZJS |
377 | const char* exec_output_to_string(ExecOutput i) _const_; |
378 | ExecOutput exec_output_from_string(const char *s) _pure_; | |
94f04347 | 379 | |
44a6b1b6 ZJS |
380 | const char* exec_input_to_string(ExecInput i) _const_; |
381 | ExecInput exec_input_from_string(const char *s) _pure_; | |
023a4f67 LP |
382 | |
383 | const char* exec_utmp_mode_to_string(ExecUtmpMode i) _const_; | |
384 | ExecUtmpMode exec_utmp_mode_from_string(const char *s) _pure_; | |
53f47dfc YW |
385 | |
386 | const char* exec_preserve_mode_to_string(ExecPreserveMode i) _const_; | |
387 | ExecPreserveMode exec_preserve_mode_from_string(const char *s) _pure_; | |
3536f49e | 388 | |
b1edf445 LP |
389 | const char* exec_keyring_mode_to_string(ExecKeyringMode i) _const_; |
390 | ExecKeyringMode exec_keyring_mode_from_string(const char *s) _pure_; | |
391 | ||
3536f49e YW |
392 | const char* exec_directory_type_to_string(ExecDirectoryType i) _const_; |
393 | ExecDirectoryType exec_directory_type_from_string(const char *s) _pure_; |