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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 | |
a7334b09 LP |
8 | ***/ |
9 | ||
5cb5a6ff LP |
10 | typedef struct ExecStatus ExecStatus; |
11 | typedef struct ExecCommand ExecCommand; | |
12 | typedef struct ExecContext ExecContext; | |
613b411c | 13 | typedef struct ExecRuntime ExecRuntime; |
9fa95f85 | 14 | typedef struct ExecParameters ExecParameters; |
e8a565cb | 15 | typedef struct Manager Manager; |
5cb5a6ff | 16 | |
71d35b6b | 17 | #include <sched.h> |
5cb5a6ff LP |
18 | #include <stdbool.h> |
19 | #include <stdio.h> | |
71d35b6b | 20 | #include <sys/capability.h> |
5cb5a6ff | 21 | |
9ce93478 | 22 | #include "cgroup-util.h" |
613b411c | 23 | #include "fdset.h" |
71d35b6b | 24 | #include "list.h" |
517d56b1 | 25 | #include "missing.h" |
417116f2 | 26 | #include "namespace.h" |
add00535 | 27 | #include "nsflags.h" |
5cb5a6ff | 28 | |
08f3be7a LP |
29 | #define EXEC_STDIN_DATA_MAX (64U*1024U*1024U) |
30 | ||
023a4f67 LP |
31 | typedef enum ExecUtmpMode { |
32 | EXEC_UTMP_INIT, | |
33 | EXEC_UTMP_LOGIN, | |
34 | EXEC_UTMP_USER, | |
35 | _EXEC_UTMP_MODE_MAX, | |
2307f37e | 36 | _EXEC_UTMP_MODE_INVALID = -1 |
023a4f67 LP |
37 | } ExecUtmpMode; |
38 | ||
80876c20 LP |
39 | typedef enum ExecInput { |
40 | EXEC_INPUT_NULL, | |
41 | EXEC_INPUT_TTY, | |
42 | EXEC_INPUT_TTY_FORCE, | |
43 | EXEC_INPUT_TTY_FAIL, | |
4f2d528d | 44 | EXEC_INPUT_SOCKET, |
52c239d7 | 45 | EXEC_INPUT_NAMED_FD, |
08f3be7a | 46 | EXEC_INPUT_DATA, |
2038c3f5 | 47 | EXEC_INPUT_FILE, |
80876c20 LP |
48 | _EXEC_INPUT_MAX, |
49 | _EXEC_INPUT_INVALID = -1 | |
50 | } ExecInput; | |
51 | ||
071830ff | 52 | typedef enum ExecOutput { |
80876c20 | 53 | EXEC_OUTPUT_INHERIT, |
94f04347 | 54 | EXEC_OUTPUT_NULL, |
80876c20 | 55 | EXEC_OUTPUT_TTY, |
94f04347 | 56 | EXEC_OUTPUT_SYSLOG, |
28dbc1e8 | 57 | EXEC_OUTPUT_SYSLOG_AND_CONSOLE, |
9a6bca7a | 58 | EXEC_OUTPUT_KMSG, |
28dbc1e8 | 59 | EXEC_OUTPUT_KMSG_AND_CONSOLE, |
706343f4 LP |
60 | EXEC_OUTPUT_JOURNAL, |
61 | EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
4f2d528d | 62 | EXEC_OUTPUT_SOCKET, |
52c239d7 | 63 | EXEC_OUTPUT_NAMED_FD, |
2038c3f5 | 64 | EXEC_OUTPUT_FILE, |
94f04347 LP |
65 | _EXEC_OUTPUT_MAX, |
66 | _EXEC_OUTPUT_INVALID = -1 | |
071830ff LP |
67 | } ExecOutput; |
68 | ||
53f47dfc YW |
69 | typedef enum ExecPreserveMode { |
70 | EXEC_PRESERVE_NO, | |
71 | EXEC_PRESERVE_YES, | |
72 | EXEC_PRESERVE_RESTART, | |
73 | _EXEC_PRESERVE_MODE_MAX, | |
74 | _EXEC_PRESERVE_MODE_INVALID = -1 | |
75 | } ExecPreserveMode; | |
76 | ||
b1edf445 LP |
77 | typedef enum ExecKeyringMode { |
78 | EXEC_KEYRING_INHERIT, | |
79 | EXEC_KEYRING_PRIVATE, | |
80 | EXEC_KEYRING_SHARED, | |
81 | _EXEC_KEYRING_MODE_MAX, | |
82 | _EXEC_KEYRING_MODE_INVALID = -1, | |
83 | } ExecKeyringMode; | |
84 | ||
5cb5a6ff | 85 | struct ExecStatus { |
63983207 LP |
86 | dual_timestamp start_timestamp; |
87 | dual_timestamp exit_timestamp; | |
9d58f1db | 88 | pid_t pid; |
9152c765 LP |
89 | int code; /* as in siginfo_t::si_code */ |
90 | int status; /* as in sigingo_t::si_status */ | |
5cb5a6ff LP |
91 | }; |
92 | ||
3ed0cd26 LP |
93 | typedef enum ExecCommandFlags { |
94 | EXEC_COMMAND_IGNORE_FAILURE = 1, | |
95 | EXEC_COMMAND_FULLY_PRIVILEGED = 2, | |
165a31c0 LP |
96 | EXEC_COMMAND_NO_SETUID = 4, |
97 | EXEC_COMMAND_AMBIENT_MAGIC = 8, | |
3ed0cd26 LP |
98 | } ExecCommandFlags; |
99 | ||
5cb5a6ff LP |
100 | struct ExecCommand { |
101 | char *path; | |
102 | char **argv; | |
034c6ed7 | 103 | ExecStatus exec_status; |
3ed0cd26 | 104 | ExecCommandFlags flags; |
034c6ed7 | 105 | LIST_FIELDS(ExecCommand, command); /* useful for chaining commands */ |
5cb5a6ff LP |
106 | }; |
107 | ||
613b411c LP |
108 | struct ExecRuntime { |
109 | int n_ref; | |
110 | ||
e8a565cb YW |
111 | Manager *manager; |
112 | ||
113 | /* unit id of the owner */ | |
114 | char *id; | |
115 | ||
613b411c LP |
116 | char *tmp_dir; |
117 | char *var_tmp_dir; | |
118 | ||
29206d46 LP |
119 | /* An AF_UNIX socket pair, that contains a datagram containing a file descriptor referring to the network |
120 | * namespace. */ | |
613b411c LP |
121 | int netns_storage_socket[2]; |
122 | }; | |
123 | ||
3536f49e YW |
124 | typedef enum ExecDirectoryType { |
125 | EXEC_DIRECTORY_RUNTIME = 0, | |
126 | EXEC_DIRECTORY_STATE, | |
127 | EXEC_DIRECTORY_CACHE, | |
128 | EXEC_DIRECTORY_LOGS, | |
129 | EXEC_DIRECTORY_CONFIGURATION, | |
72fd1768 LP |
130 | _EXEC_DIRECTORY_TYPE_MAX, |
131 | _EXEC_DIRECTORY_TYPE_INVALID = -1, | |
3536f49e YW |
132 | } ExecDirectoryType; |
133 | ||
134 | typedef struct ExecDirectory { | |
135 | char **paths; | |
136 | mode_t mode; | |
137 | } ExecDirectory; | |
138 | ||
5cb5a6ff LP |
139 | struct ExecContext { |
140 | char **environment; | |
8c7be95e | 141 | char **environment_files; |
b4c14404 | 142 | char **pass_environment; |
00819cc1 | 143 | char **unset_environment; |
8c7be95e | 144 | |
517d56b1 | 145 | struct rlimit *rlimit[_RLIMIT_MAX]; |
915e6d16 | 146 | char *working_directory, *root_directory, *root_image; |
4c08c824 | 147 | bool working_directory_missing_ok; |
5f5d8eab | 148 | bool working_directory_home; |
9d58f1db LP |
149 | |
150 | mode_t umask; | |
dd6c17b1 | 151 | int oom_score_adjust; |
5cb5a6ff | 152 | int nice; |
9eba9da4 | 153 | int ioprio; |
94f04347 LP |
154 | int cpu_sched_policy; |
155 | int cpu_sched_priority; | |
9d58f1db | 156 | |
82c121a4 LP |
157 | cpu_set_t *cpuset; |
158 | unsigned cpuset_ncpus; | |
fb33a393 | 159 | |
80876c20 LP |
160 | ExecInput std_input; |
161 | ExecOutput std_output; | |
162 | ExecOutput std_error; | |
52c239d7 | 163 | char *stdio_fdname[3]; |
2038c3f5 | 164 | char *stdio_file[3]; |
80876c20 | 165 | |
08f3be7a LP |
166 | void *stdin_data; |
167 | size_t stdin_data_size; | |
80876c20 | 168 | |
d88a251b | 169 | nsec_t timer_slack_nsec; |
071830ff | 170 | |
1e22b5cd LP |
171 | bool stdio_as_fds; |
172 | ||
9d58f1db | 173 | char *tty_path; |
5cb5a6ff | 174 | |
6ea832a2 LP |
175 | bool tty_reset; |
176 | bool tty_vhangup; | |
177 | bool tty_vt_disallocate; | |
178 | ||
353e12c2 LP |
179 | bool ignore_sigpipe; |
180 | ||
61233823 | 181 | /* Since resolving these names might involve socket |
5cb5a6ff | 182 | * connections and we don't want to deadlock ourselves these |
94f04347 LP |
183 | * names are resolved on execution only and in the child |
184 | * process. */ | |
5cb5a6ff LP |
185 | char *user; |
186 | char *group; | |
187 | char **supplementary_groups; | |
9d58f1db | 188 | |
5b6319dc LP |
189 | char *pam_name; |
190 | ||
169c1bda | 191 | char *utmp_id; |
023a4f67 | 192 | ExecUtmpMode utmp_mode; |
169c1bda | 193 | |
5f8640fb | 194 | bool selinux_context_ignore; |
7b52a628 MS |
195 | char *selinux_context; |
196 | ||
eef65bf3 MS |
197 | bool apparmor_profile_ignore; |
198 | char *apparmor_profile; | |
199 | ||
2ca620c4 WC |
200 | bool smack_process_label_ignore; |
201 | char *smack_process_label; | |
202 | ||
b1edf445 LP |
203 | ExecKeyringMode keyring_mode; |
204 | ||
2a624c36 | 205 | char **read_write_paths, **read_only_paths, **inaccessible_paths; |
15ae422b | 206 | unsigned long mount_flags; |
d2d6c096 | 207 | BindMount *bind_mounts; |
da6053d0 | 208 | size_t n_bind_mounts; |
2abd4e38 | 209 | TemporaryFileSystem *temporary_filesystems; |
da6053d0 | 210 | size_t n_temporary_filesystems; |
15ae422b | 211 | |
a103496c | 212 | uint64_t capability_bounding_set; |
755d4b67 | 213 | uint64_t capability_ambient_set; |
9d58f1db LP |
214 | int secure_bits; |
215 | ||
7fab9d01 LP |
216 | int syslog_priority; |
217 | char *syslog_identifier; | |
218 | bool syslog_level_prefix; | |
219 | ||
d3070fbd LP |
220 | int log_level_max; |
221 | ||
222 | struct iovec* log_extra_fields; | |
223 | size_t n_log_extra_fields; | |
224 | ||
9d58f1db LP |
225 | bool cpu_sched_reset_on_fork; |
226 | bool non_blocking; | |
15ae422b | 227 | bool private_tmp; |
ff01d048 | 228 | bool private_network; |
7f112f50 | 229 | bool private_devices; |
d251207d | 230 | bool private_users; |
1b8689f9 LP |
231 | ProtectSystem protect_system; |
232 | ProtectHome protect_home; | |
59eeb84b | 233 | bool protect_kernel_tunables; |
502d704e | 234 | bool protect_kernel_modules; |
59eeb84b | 235 | bool protect_control_groups; |
5d997827 | 236 | bool mount_apivfs; |
9d58f1db | 237 | |
8351ceae LP |
238 | bool no_new_privileges; |
239 | ||
29206d46 | 240 | bool dynamic_user; |
00d9ef85 | 241 | bool remove_ipc; |
29206d46 | 242 | |
9d58f1db LP |
243 | /* This is not exposed to the user but available |
244 | * internally. We need it to make sure that whenever we spawn | |
f00929ad | 245 | * /usr/bin/mount it is run in the same process group as us so |
9d58f1db LP |
246 | * that the autofs logic detects that it belongs to us and we |
247 | * don't enter a trigger loop. */ | |
74922904 | 248 | bool same_pgrp; |
2e22afe9 | 249 | |
ac45f971 | 250 | unsigned long personality; |
78e864e5 | 251 | bool lock_personality; |
ac45f971 | 252 | |
add00535 LP |
253 | unsigned long restrict_namespaces; /* The CLONE_NEWxyz flags permitted to the unit's processes */ |
254 | ||
8cfa775f | 255 | Hashmap *syscall_filter; |
57183d11 | 256 | Set *syscall_archs; |
17df7223 LP |
257 | int syscall_errno; |
258 | bool syscall_whitelist:1; | |
8351ceae | 259 | |
4298d0b5 LP |
260 | Set *address_families; |
261 | bool address_families_whitelist:1; | |
262 | ||
53f47dfc | 263 | ExecPreserveMode runtime_directory_preserve_mode; |
72fd1768 | 264 | ExecDirectory directories[_EXEC_DIRECTORY_TYPE_MAX]; |
e66cf1a3 | 265 | |
f4170c67 LP |
266 | bool memory_deny_write_execute; |
267 | bool restrict_realtime; | |
268 | ||
dd6c17b1 | 269 | bool oom_score_adjust_set:1; |
7fab9d01 LP |
270 | bool nice_set:1; |
271 | bool ioprio_set:1; | |
272 | bool cpu_sched_set:1; | |
5cb5a6ff LP |
273 | }; |
274 | ||
add00535 LP |
275 | static inline bool exec_context_restrict_namespaces_set(const ExecContext *c) { |
276 | assert(c); | |
277 | ||
278 | return (c->restrict_namespaces & NAMESPACE_FLAGS_ALL) != NAMESPACE_FLAGS_ALL; | |
279 | } | |
280 | ||
c39f1ce2 | 281 | typedef enum ExecFlags { |
1703fa41 | 282 | EXEC_APPLY_SANDBOXING = 1U << 0, |
7d5ceb64 FB |
283 | EXEC_APPLY_CHROOT = 1U << 1, |
284 | EXEC_APPLY_TTY_STDIN = 1U << 2, | |
74dd6b51 | 285 | EXEC_NEW_KEYRING = 1U << 3, |
af635cf3 | 286 | EXEC_PASS_LOG_UNIT = 1U << 4, /* Whether to pass the unit name to the service's journal stream connection */ |
8679efde | 287 | EXEC_CHOWN_DIRECTORIES = 1U << 5, /* chown() the runtime/state/cache/log directories to the user we run as, under all conditions */ |
ac647978 | 288 | EXEC_NSS_BYPASS_BUS = 1U << 6, /* Set the SYSTEMD_NSS_BYPASS_BUS environment variable, to disable nss-systemd for dbus */ |
584b8688 | 289 | EXEC_CGROUP_DELEGATE = 1U << 7, |
c39f1ce2 | 290 | |
9c1a61ad | 291 | /* The following are not used by execute.c, but by consumers internally */ |
584b8688 LP |
292 | EXEC_PASS_FDS = 1U << 8, |
293 | EXEC_IS_CONTROL = 1U << 9, | |
294 | EXEC_SETENV_RESULT = 1U << 10, | |
295 | EXEC_SET_WATCHDOG = 1U << 11, | |
c39f1ce2 LP |
296 | } ExecFlags; |
297 | ||
9fa95f85 DM |
298 | struct ExecParameters { |
299 | char **argv; | |
a34ceba6 | 300 | char **environment; |
8dd4c05b LP |
301 | |
302 | int *fds; | |
303 | char **fd_names; | |
da6053d0 LP |
304 | size_t n_storage_fds; |
305 | size_t n_socket_fds; | |
8dd4c05b | 306 | |
c39f1ce2 | 307 | ExecFlags flags; |
a34ceba6 | 308 | bool selinux_context_net:1; |
8dd4c05b | 309 | |
efdb0237 | 310 | CGroupMask cgroup_supported; |
9fa95f85 | 311 | const char *cgroup_path; |
8dd4c05b | 312 | |
3536f49e | 313 | char **prefix; |
8dd4c05b | 314 | |
7d5ceb64 FB |
315 | const char *confirm_spawn; |
316 | ||
9fa95f85 | 317 | usec_t watchdog_usec; |
8dd4c05b | 318 | |
9fa95f85 | 319 | int *idle_pipe; |
8dd4c05b | 320 | |
a34ceba6 LP |
321 | int stdin_fd; |
322 | int stdout_fd; | |
323 | int stderr_fd; | |
9fa95f85 DM |
324 | }; |
325 | ||
9ce93478 | 326 | #include "unit.h" |
29206d46 | 327 | #include "dynamic-user.h" |
9ce93478 | 328 | |
f2341e0a LP |
329 | int exec_spawn(Unit *unit, |
330 | ExecCommand *command, | |
9fa95f85 DM |
331 | const ExecContext *context, |
332 | const ExecParameters *exec_params, | |
613b411c | 333 | ExecRuntime *runtime, |
29206d46 | 334 | DynamicCreds *dynamic_creds, |
81a2b7ce | 335 | pid_t *ret); |
5cb5a6ff | 336 | |
da6053d0 | 337 | void exec_command_done_array(ExecCommand *c, size_t n); |
43d0fcbd | 338 | |
f1acf85a | 339 | ExecCommand* exec_command_free_list(ExecCommand *c); |
da6053d0 | 340 | void exec_command_free_array(ExecCommand **c, size_t n); |
5cb5a6ff | 341 | |
44d8db9e | 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); |
34cf6c43 | 349 | void exec_context_dump(const ExecContext *c, FILE* f, const char *prefix); |
5cb5a6ff | 350 | |
34cf6c43 | 351 | int exec_context_destroy_runtime_directory(const ExecContext *c, const char *runtime_root); |
e66cf1a3 | 352 | |
52c239d7 | 353 | const char* exec_context_fdname(const ExecContext *c, int fd_index); |
8c7be95e | 354 | |
34cf6c43 YW |
355 | bool exec_context_may_touch_console(const ExecContext *c); |
356 | bool exec_context_maintains_privileges(const ExecContext *c); | |
6ac8fdc9 | 357 | |
34cf6c43 | 358 | int exec_context_get_effective_ioprio(const ExecContext *c); |
7f452159 | 359 | |
d3070fbd LP |
360 | void exec_context_free_log_extra_fields(ExecContext *c); |
361 | ||
b58b4116 | 362 | void exec_status_start(ExecStatus *s, pid_t pid); |
34cf6c43 YW |
363 | void exec_status_exit(ExecStatus *s, const ExecContext *context, pid_t pid, int code, int status); |
364 | void exec_status_dump(const ExecStatus *s, FILE *f, const char *prefix); | |
5cb5a6ff | 365 | |
e8a565cb YW |
366 | int exec_runtime_acquire(Manager *m, const ExecContext *c, const char *name, bool create, ExecRuntime **ret); |
367 | ExecRuntime *exec_runtime_unref(ExecRuntime *r, bool destroy); | |
613b411c | 368 | |
e8a565cb YW |
369 | int exec_runtime_serialize(const Manager *m, FILE *f, FDSet *fds); |
370 | int exec_runtime_deserialize_compat(Unit *u, const char *key, const char *value, FDSet *fds); | |
371 | void exec_runtime_deserialize_one(Manager *m, const char *value, FDSet *fds); | |
372 | void exec_runtime_vacuum(Manager *m); | |
613b411c | 373 | |
44a6b1b6 ZJS |
374 | const char* exec_output_to_string(ExecOutput i) _const_; |
375 | ExecOutput exec_output_from_string(const char *s) _pure_; | |
94f04347 | 376 | |
44a6b1b6 ZJS |
377 | const char* exec_input_to_string(ExecInput i) _const_; |
378 | ExecInput exec_input_from_string(const char *s) _pure_; | |
023a4f67 LP |
379 | |
380 | const char* exec_utmp_mode_to_string(ExecUtmpMode i) _const_; | |
381 | ExecUtmpMode exec_utmp_mode_from_string(const char *s) _pure_; | |
53f47dfc YW |
382 | |
383 | const char* exec_preserve_mode_to_string(ExecPreserveMode i) _const_; | |
384 | ExecPreserveMode exec_preserve_mode_from_string(const char *s) _pure_; | |
3536f49e | 385 | |
b1edf445 LP |
386 | const char* exec_keyring_mode_to_string(ExecKeyringMode i) _const_; |
387 | ExecKeyringMode exec_keyring_mode_from_string(const char *s) _pure_; | |
388 | ||
3536f49e YW |
389 | const char* exec_directory_type_to_string(ExecDirectoryType i) _const_; |
390 | ExecDirectoryType exec_directory_type_from_string(const char *s) _pure_; |