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Commit | Line | Data |
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c2f1db8f | 1 | #pragma once |
5cb5a6ff | 2 | |
a7334b09 LP |
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 | |
a7334b09 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. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
5cb5a6ff LP |
22 | typedef struct ExecStatus ExecStatus; |
23 | typedef struct ExecCommand ExecCommand; | |
24 | typedef struct ExecContext ExecContext; | |
613b411c | 25 | typedef struct ExecRuntime ExecRuntime; |
9fa95f85 | 26 | typedef struct ExecParameters ExecParameters; |
5cb5a6ff | 27 | |
71d35b6b | 28 | #include <sched.h> |
5cb5a6ff LP |
29 | #include <stdbool.h> |
30 | #include <stdio.h> | |
71d35b6b | 31 | #include <sys/capability.h> |
5cb5a6ff | 32 | |
9ce93478 | 33 | #include "cgroup-util.h" |
613b411c | 34 | #include "fdset.h" |
71d35b6b | 35 | #include "list.h" |
517d56b1 | 36 | #include "missing.h" |
417116f2 | 37 | #include "namespace.h" |
add00535 | 38 | #include "nsflags.h" |
5cb5a6ff | 39 | |
023a4f67 LP |
40 | typedef enum ExecUtmpMode { |
41 | EXEC_UTMP_INIT, | |
42 | EXEC_UTMP_LOGIN, | |
43 | EXEC_UTMP_USER, | |
44 | _EXEC_UTMP_MODE_MAX, | |
2307f37e | 45 | _EXEC_UTMP_MODE_INVALID = -1 |
023a4f67 LP |
46 | } ExecUtmpMode; |
47 | ||
80876c20 LP |
48 | typedef enum ExecInput { |
49 | EXEC_INPUT_NULL, | |
50 | EXEC_INPUT_TTY, | |
51 | EXEC_INPUT_TTY_FORCE, | |
52 | EXEC_INPUT_TTY_FAIL, | |
4f2d528d | 53 | EXEC_INPUT_SOCKET, |
52c239d7 | 54 | EXEC_INPUT_NAMED_FD, |
80876c20 LP |
55 | _EXEC_INPUT_MAX, |
56 | _EXEC_INPUT_INVALID = -1 | |
57 | } ExecInput; | |
58 | ||
071830ff | 59 | typedef enum ExecOutput { |
80876c20 | 60 | EXEC_OUTPUT_INHERIT, |
94f04347 | 61 | EXEC_OUTPUT_NULL, |
80876c20 | 62 | EXEC_OUTPUT_TTY, |
94f04347 | 63 | EXEC_OUTPUT_SYSLOG, |
28dbc1e8 | 64 | EXEC_OUTPUT_SYSLOG_AND_CONSOLE, |
9a6bca7a | 65 | EXEC_OUTPUT_KMSG, |
28dbc1e8 | 66 | EXEC_OUTPUT_KMSG_AND_CONSOLE, |
706343f4 LP |
67 | EXEC_OUTPUT_JOURNAL, |
68 | EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
4f2d528d | 69 | EXEC_OUTPUT_SOCKET, |
52c239d7 | 70 | EXEC_OUTPUT_NAMED_FD, |
94f04347 LP |
71 | _EXEC_OUTPUT_MAX, |
72 | _EXEC_OUTPUT_INVALID = -1 | |
071830ff LP |
73 | } ExecOutput; |
74 | ||
5cb5a6ff | 75 | struct ExecStatus { |
63983207 LP |
76 | dual_timestamp start_timestamp; |
77 | dual_timestamp exit_timestamp; | |
9d58f1db | 78 | pid_t pid; |
9152c765 LP |
79 | int code; /* as in siginfo_t::si_code */ |
80 | int status; /* as in sigingo_t::si_status */ | |
5cb5a6ff LP |
81 | }; |
82 | ||
83 | struct ExecCommand { | |
84 | char *path; | |
85 | char **argv; | |
034c6ed7 LP |
86 | ExecStatus exec_status; |
87 | LIST_FIELDS(ExecCommand, command); /* useful for chaining commands */ | |
cf677fe6 AP |
88 | bool ignore:1; |
89 | bool privileged:1; | |
5cb5a6ff LP |
90 | }; |
91 | ||
613b411c LP |
92 | struct ExecRuntime { |
93 | int n_ref; | |
94 | ||
95 | char *tmp_dir; | |
96 | char *var_tmp_dir; | |
97 | ||
29206d46 LP |
98 | /* An AF_UNIX socket pair, that contains a datagram containing a file descriptor referring to the network |
99 | * namespace. */ | |
613b411c LP |
100 | int netns_storage_socket[2]; |
101 | }; | |
102 | ||
5cb5a6ff LP |
103 | struct ExecContext { |
104 | char **environment; | |
8c7be95e | 105 | char **environment_files; |
b4c14404 | 106 | char **pass_environment; |
8c7be95e | 107 | |
517d56b1 | 108 | struct rlimit *rlimit[_RLIMIT_MAX]; |
9eba9da4 | 109 | char *working_directory, *root_directory; |
4c08c824 | 110 | bool working_directory_missing_ok; |
5f5d8eab | 111 | bool working_directory_home; |
9d58f1db LP |
112 | |
113 | mode_t umask; | |
dd6c17b1 | 114 | int oom_score_adjust; |
5cb5a6ff | 115 | int nice; |
9eba9da4 | 116 | int ioprio; |
94f04347 LP |
117 | int cpu_sched_policy; |
118 | int cpu_sched_priority; | |
9d58f1db | 119 | |
82c121a4 LP |
120 | cpu_set_t *cpuset; |
121 | unsigned cpuset_ncpus; | |
fb33a393 | 122 | |
80876c20 LP |
123 | ExecInput std_input; |
124 | ExecOutput std_output; | |
125 | ExecOutput std_error; | |
52c239d7 | 126 | char *stdio_fdname[3]; |
80876c20 | 127 | |
d88a251b | 128 | nsec_t timer_slack_nsec; |
071830ff | 129 | |
1e22b5cd LP |
130 | bool stdio_as_fds; |
131 | ||
9d58f1db | 132 | char *tty_path; |
5cb5a6ff | 133 | |
6ea832a2 LP |
134 | bool tty_reset; |
135 | bool tty_vhangup; | |
136 | bool tty_vt_disallocate; | |
137 | ||
353e12c2 LP |
138 | bool ignore_sigpipe; |
139 | ||
61233823 | 140 | /* Since resolving these names might involve socket |
5cb5a6ff | 141 | * connections and we don't want to deadlock ourselves these |
94f04347 LP |
142 | * names are resolved on execution only and in the child |
143 | * process. */ | |
5cb5a6ff LP |
144 | char *user; |
145 | char *group; | |
146 | char **supplementary_groups; | |
9d58f1db | 147 | |
5b6319dc LP |
148 | char *pam_name; |
149 | ||
169c1bda | 150 | char *utmp_id; |
023a4f67 | 151 | ExecUtmpMode utmp_mode; |
169c1bda | 152 | |
5f8640fb | 153 | bool selinux_context_ignore; |
7b52a628 MS |
154 | char *selinux_context; |
155 | ||
eef65bf3 MS |
156 | bool apparmor_profile_ignore; |
157 | char *apparmor_profile; | |
158 | ||
2ca620c4 WC |
159 | bool smack_process_label_ignore; |
160 | char *smack_process_label; | |
161 | ||
2a624c36 | 162 | char **read_write_paths, **read_only_paths, **inaccessible_paths; |
15ae422b LP |
163 | unsigned long mount_flags; |
164 | ||
a103496c | 165 | uint64_t capability_bounding_set; |
755d4b67 | 166 | uint64_t capability_ambient_set; |
9d58f1db LP |
167 | int secure_bits; |
168 | ||
7fab9d01 LP |
169 | int syslog_priority; |
170 | char *syslog_identifier; | |
171 | bool syslog_level_prefix; | |
172 | ||
9d58f1db LP |
173 | bool cpu_sched_reset_on_fork; |
174 | bool non_blocking; | |
15ae422b | 175 | bool private_tmp; |
ff01d048 | 176 | bool private_network; |
7f112f50 | 177 | bool private_devices; |
d251207d | 178 | bool private_users; |
1b8689f9 LP |
179 | ProtectSystem protect_system; |
180 | ProtectHome protect_home; | |
59eeb84b | 181 | bool protect_kernel_tunables; |
502d704e | 182 | bool protect_kernel_modules; |
59eeb84b | 183 | bool protect_control_groups; |
9d58f1db | 184 | |
8351ceae LP |
185 | bool no_new_privileges; |
186 | ||
29206d46 | 187 | bool dynamic_user; |
00d9ef85 | 188 | bool remove_ipc; |
29206d46 | 189 | |
9d58f1db LP |
190 | /* This is not exposed to the user but available |
191 | * internally. We need it to make sure that whenever we spawn | |
f00929ad | 192 | * /usr/bin/mount it is run in the same process group as us so |
9d58f1db LP |
193 | * that the autofs logic detects that it belongs to us and we |
194 | * don't enter a trigger loop. */ | |
74922904 | 195 | bool same_pgrp; |
2e22afe9 | 196 | |
ac45f971 LP |
197 | unsigned long personality; |
198 | ||
add00535 LP |
199 | unsigned long restrict_namespaces; /* The CLONE_NEWxyz flags permitted to the unit's processes */ |
200 | ||
17df7223 | 201 | Set *syscall_filter; |
57183d11 | 202 | Set *syscall_archs; |
17df7223 LP |
203 | int syscall_errno; |
204 | bool syscall_whitelist:1; | |
8351ceae | 205 | |
4298d0b5 LP |
206 | Set *address_families; |
207 | bool address_families_whitelist:1; | |
208 | ||
e66cf1a3 LP |
209 | char **runtime_directory; |
210 | mode_t runtime_directory_mode; | |
211 | ||
f4170c67 LP |
212 | bool memory_deny_write_execute; |
213 | bool restrict_realtime; | |
214 | ||
dd6c17b1 | 215 | bool oom_score_adjust_set:1; |
7fab9d01 LP |
216 | bool nice_set:1; |
217 | bool ioprio_set:1; | |
218 | bool cpu_sched_set:1; | |
5cb5a6ff LP |
219 | }; |
220 | ||
add00535 LP |
221 | static inline bool exec_context_restrict_namespaces_set(const ExecContext *c) { |
222 | assert(c); | |
223 | ||
224 | return (c->restrict_namespaces & NAMESPACE_FLAGS_ALL) != NAMESPACE_FLAGS_ALL; | |
225 | } | |
226 | ||
c39f1ce2 | 227 | typedef enum ExecFlags { |
7d5ceb64 FB |
228 | EXEC_APPLY_PERMISSIONS = 1U << 0, |
229 | EXEC_APPLY_CHROOT = 1U << 1, | |
230 | EXEC_APPLY_TTY_STDIN = 1U << 2, | |
c39f1ce2 | 231 | |
9c1a61ad | 232 | /* The following are not used by execute.c, but by consumers internally */ |
7d5ceb64 FB |
233 | EXEC_PASS_FDS = 1U << 3, |
234 | EXEC_IS_CONTROL = 1U << 4, | |
235 | EXEC_SETENV_RESULT = 1U << 5, | |
236 | EXEC_SET_WATCHDOG = 1U << 6, | |
c39f1ce2 LP |
237 | } ExecFlags; |
238 | ||
9fa95f85 DM |
239 | struct ExecParameters { |
240 | char **argv; | |
a34ceba6 | 241 | char **environment; |
8dd4c05b LP |
242 | |
243 | int *fds; | |
244 | char **fd_names; | |
245 | unsigned n_fds; | |
246 | ||
c39f1ce2 | 247 | ExecFlags flags; |
a34ceba6 | 248 | bool selinux_context_net:1; |
8dd4c05b | 249 | |
a34ceba6 | 250 | bool cgroup_delegate:1; |
efdb0237 | 251 | CGroupMask cgroup_supported; |
9fa95f85 | 252 | const char *cgroup_path; |
8dd4c05b | 253 | |
9fa95f85 | 254 | const char *runtime_prefix; |
8dd4c05b | 255 | |
7d5ceb64 FB |
256 | const char *confirm_spawn; |
257 | ||
9fa95f85 | 258 | usec_t watchdog_usec; |
8dd4c05b | 259 | |
9fa95f85 | 260 | int *idle_pipe; |
8dd4c05b | 261 | |
a34ceba6 LP |
262 | int stdin_fd; |
263 | int stdout_fd; | |
264 | int stderr_fd; | |
9fa95f85 DM |
265 | }; |
266 | ||
9ce93478 | 267 | #include "unit.h" |
29206d46 | 268 | #include "dynamic-user.h" |
9ce93478 | 269 | |
f2341e0a LP |
270 | int exec_spawn(Unit *unit, |
271 | ExecCommand *command, | |
9fa95f85 DM |
272 | const ExecContext *context, |
273 | const ExecParameters *exec_params, | |
613b411c | 274 | ExecRuntime *runtime, |
29206d46 | 275 | DynamicCreds *dynamic_creds, |
81a2b7ce | 276 | pid_t *ret); |
5cb5a6ff | 277 | |
43d0fcbd LP |
278 | void exec_command_done(ExecCommand *c); |
279 | void exec_command_done_array(ExecCommand *c, unsigned n); | |
280 | ||
f1acf85a | 281 | ExecCommand* exec_command_free_list(ExecCommand *c); |
034c6ed7 | 282 | void exec_command_free_array(ExecCommand **c, unsigned n); |
5cb5a6ff | 283 | |
9e2f7c11 LP |
284 | char *exec_command_line(char **argv); |
285 | ||
44d8db9e LP |
286 | void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix); |
287 | void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix); | |
a6a80b4f | 288 | void exec_command_append_list(ExecCommand **l, ExecCommand *e); |
26fd040d | 289 | int exec_command_set(ExecCommand *c, const char *path, ...); |
86b23b07 | 290 | int exec_command_append(ExecCommand *c, const char *path, ...); |
44d8db9e | 291 | |
034c6ed7 | 292 | void exec_context_init(ExecContext *c); |
613b411c | 293 | void exec_context_done(ExecContext *c); |
5cb5a6ff LP |
294 | void exec_context_dump(ExecContext *c, FILE* f, const char *prefix); |
295 | ||
e66cf1a3 LP |
296 | int exec_context_destroy_runtime_directory(ExecContext *c, const char *runtime_root); |
297 | ||
f2341e0a | 298 | int exec_context_load_environment(Unit *unit, const ExecContext *c, char ***l); |
52c239d7 LB |
299 | int exec_context_named_iofds(Unit *unit, const ExecContext *c, const ExecParameters *p, int named_iofds[3]); |
300 | const char* exec_context_fdname(const ExecContext *c, int fd_index); | |
8c7be95e | 301 | |
6ac8fdc9 | 302 | bool exec_context_may_touch_console(ExecContext *c); |
a931ad47 | 303 | bool exec_context_maintains_privileges(ExecContext *c); |
6ac8fdc9 | 304 | |
b58b4116 | 305 | void exec_status_start(ExecStatus *s, pid_t pid); |
6ea832a2 | 306 | void exec_status_exit(ExecStatus *s, ExecContext *context, pid_t pid, int code, int status); |
9fb86720 | 307 | void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix); |
5cb5a6ff | 308 | |
613b411c LP |
309 | int exec_runtime_make(ExecRuntime **rt, ExecContext *c, const char *id); |
310 | ExecRuntime *exec_runtime_ref(ExecRuntime *r); | |
311 | ExecRuntime *exec_runtime_unref(ExecRuntime *r); | |
312 | ||
f2341e0a LP |
313 | int exec_runtime_serialize(Unit *unit, ExecRuntime *rt, FILE *f, FDSet *fds); |
314 | int exec_runtime_deserialize_item(Unit *unit, ExecRuntime **rt, const char *key, const char *value, FDSet *fds); | |
613b411c LP |
315 | |
316 | void exec_runtime_destroy(ExecRuntime *rt); | |
317 | ||
44a6b1b6 ZJS |
318 | const char* exec_output_to_string(ExecOutput i) _const_; |
319 | ExecOutput exec_output_from_string(const char *s) _pure_; | |
94f04347 | 320 | |
44a6b1b6 ZJS |
321 | const char* exec_input_to_string(ExecInput i) _const_; |
322 | ExecInput exec_input_from_string(const char *s) _pure_; | |
023a4f67 LP |
323 | |
324 | const char* exec_utmp_mode_to_string(ExecUtmpMode i) _const_; | |
325 | ExecUtmpMode exec_utmp_mode_from_string(const char *s) _pure_; |