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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ | |
2 | ||
3 | #pragma once | |
4 | ||
5 | /*** | |
6 | This file is part of systemd. | |
7 | ||
8 | Copyright 2010 Lennart Poettering | |
9 | ||
10 | systemd is free software; you can redistribute it and/or modify it | |
11 | under the terms of the GNU Lesser General Public License as published by | |
12 | the Free Software Foundation; either version 2.1 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | systemd is distributed in the hope that it will be useful, but | |
16 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | Lesser General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU Lesser General Public License | |
21 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
22 | ***/ | |
23 | ||
24 | typedef struct ExecStatus ExecStatus; | |
25 | typedef struct ExecCommand ExecCommand; | |
26 | typedef struct ExecContext ExecContext; | |
27 | typedef struct ExecRuntime ExecRuntime; | |
28 | typedef struct ExecParameters ExecParameters; | |
29 | ||
30 | #include <sys/capability.h> | |
31 | #include <stdbool.h> | |
32 | #include <stdio.h> | |
33 | #include <sched.h> | |
34 | ||
35 | #include "list.h" | |
36 | #include "fdset.h" | |
37 | #include "missing.h" | |
38 | #include "namespace.h" | |
39 | #include "bus-endpoint.h" | |
40 | ||
41 | typedef enum ExecInput { | |
42 | EXEC_INPUT_NULL, | |
43 | EXEC_INPUT_TTY, | |
44 | EXEC_INPUT_TTY_FORCE, | |
45 | EXEC_INPUT_TTY_FAIL, | |
46 | EXEC_INPUT_SOCKET, | |
47 | _EXEC_INPUT_MAX, | |
48 | _EXEC_INPUT_INVALID = -1 | |
49 | } ExecInput; | |
50 | ||
51 | typedef enum ExecOutput { | |
52 | EXEC_OUTPUT_INHERIT, | |
53 | EXEC_OUTPUT_NULL, | |
54 | EXEC_OUTPUT_TTY, | |
55 | EXEC_OUTPUT_SYSLOG, | |
56 | EXEC_OUTPUT_SYSLOG_AND_CONSOLE, | |
57 | EXEC_OUTPUT_KMSG, | |
58 | EXEC_OUTPUT_KMSG_AND_CONSOLE, | |
59 | EXEC_OUTPUT_JOURNAL, | |
60 | EXEC_OUTPUT_JOURNAL_AND_CONSOLE, | |
61 | EXEC_OUTPUT_SOCKET, | |
62 | _EXEC_OUTPUT_MAX, | |
63 | _EXEC_OUTPUT_INVALID = -1 | |
64 | } ExecOutput; | |
65 | ||
66 | struct ExecStatus { | |
67 | dual_timestamp start_timestamp; | |
68 | dual_timestamp exit_timestamp; | |
69 | pid_t pid; | |
70 | int code; /* as in siginfo_t::si_code */ | |
71 | int status; /* as in sigingo_t::si_status */ | |
72 | }; | |
73 | ||
74 | struct ExecCommand { | |
75 | char *path; | |
76 | char **argv; | |
77 | ExecStatus exec_status; | |
78 | LIST_FIELDS(ExecCommand, command); /* useful for chaining commands */ | |
79 | bool ignore; | |
80 | }; | |
81 | ||
82 | struct ExecRuntime { | |
83 | int n_ref; | |
84 | ||
85 | char *tmp_dir; | |
86 | char *var_tmp_dir; | |
87 | ||
88 | int netns_storage_socket[2]; | |
89 | }; | |
90 | ||
91 | struct ExecContext { | |
92 | char **environment; | |
93 | char **environment_files; | |
94 | ||
95 | struct rlimit *rlimit[_RLIMIT_MAX]; | |
96 | char *working_directory, *root_directory; | |
97 | bool working_directory_missing_ok; | |
98 | ||
99 | mode_t umask; | |
100 | int oom_score_adjust; | |
101 | int nice; | |
102 | int ioprio; | |
103 | int cpu_sched_policy; | |
104 | int cpu_sched_priority; | |
105 | ||
106 | cpu_set_t *cpuset; | |
107 | unsigned cpuset_ncpus; | |
108 | ||
109 | ExecInput std_input; | |
110 | ExecOutput std_output; | |
111 | ExecOutput std_error; | |
112 | ||
113 | nsec_t timer_slack_nsec; | |
114 | ||
115 | char *tty_path; | |
116 | ||
117 | bool tty_reset; | |
118 | bool tty_vhangup; | |
119 | bool tty_vt_disallocate; | |
120 | ||
121 | bool ignore_sigpipe; | |
122 | ||
123 | /* Since resolving these names might might involve socket | |
124 | * connections and we don't want to deadlock ourselves these | |
125 | * names are resolved on execution only and in the child | |
126 | * process. */ | |
127 | char *user; | |
128 | char *group; | |
129 | char **supplementary_groups; | |
130 | ||
131 | char *pam_name; | |
132 | ||
133 | char *utmp_id; | |
134 | ||
135 | bool selinux_context_ignore; | |
136 | char *selinux_context; | |
137 | ||
138 | bool apparmor_profile_ignore; | |
139 | char *apparmor_profile; | |
140 | ||
141 | bool smack_process_label_ignore; | |
142 | char *smack_process_label; | |
143 | ||
144 | char **read_write_dirs, **read_only_dirs, **inaccessible_dirs; | |
145 | unsigned long mount_flags; | |
146 | ||
147 | uint64_t capability_bounding_set_drop; | |
148 | ||
149 | cap_t capabilities; | |
150 | int secure_bits; | |
151 | ||
152 | int syslog_priority; | |
153 | char *syslog_identifier; | |
154 | bool syslog_level_prefix; | |
155 | ||
156 | bool cpu_sched_reset_on_fork; | |
157 | bool non_blocking; | |
158 | bool private_tmp; | |
159 | bool private_network; | |
160 | bool private_devices; | |
161 | ProtectSystem protect_system; | |
162 | ProtectHome protect_home; | |
163 | ||
164 | bool no_new_privileges; | |
165 | ||
166 | /* This is not exposed to the user but available | |
167 | * internally. We need it to make sure that whenever we spawn | |
168 | * /bin/mount it is run in the same process group as us so | |
169 | * that the autofs logic detects that it belongs to us and we | |
170 | * don't enter a trigger loop. */ | |
171 | bool same_pgrp; | |
172 | ||
173 | unsigned long personality; | |
174 | ||
175 | Set *syscall_filter; | |
176 | Set *syscall_archs; | |
177 | int syscall_errno; | |
178 | bool syscall_whitelist:1; | |
179 | ||
180 | Set *address_families; | |
181 | bool address_families_whitelist:1; | |
182 | ||
183 | char **runtime_directory; | |
184 | mode_t runtime_directory_mode; | |
185 | ||
186 | bool oom_score_adjust_set:1; | |
187 | bool nice_set:1; | |
188 | bool ioprio_set:1; | |
189 | bool cpu_sched_set:1; | |
190 | bool no_new_privileges_set:1; | |
191 | ||
192 | /* custom dbus enpoint */ | |
193 | BusEndpoint *bus_endpoint; | |
194 | }; | |
195 | ||
196 | #include "cgroup.h" | |
197 | #include "cgroup-util.h" | |
198 | ||
199 | struct ExecParameters { | |
200 | char **argv; | |
201 | int *fds; unsigned n_fds; | |
202 | char **environment; | |
203 | bool apply_permissions; | |
204 | bool apply_chroot; | |
205 | bool apply_tty_stdin; | |
206 | bool confirm_spawn; | |
207 | bool selinux_context_net; | |
208 | CGroupControllerMask cgroup_supported; | |
209 | const char *cgroup_path; | |
210 | bool cgroup_delegate; | |
211 | const char *runtime_prefix; | |
212 | const char *unit_id; | |
213 | usec_t watchdog_usec; | |
214 | int *idle_pipe; | |
215 | char *bus_endpoint_path; | |
216 | int bus_endpoint_fd; | |
217 | }; | |
218 | ||
219 | int exec_spawn(ExecCommand *command, | |
220 | const ExecContext *context, | |
221 | const ExecParameters *exec_params, | |
222 | ExecRuntime *runtime, | |
223 | pid_t *ret); | |
224 | ||
225 | void exec_command_done(ExecCommand *c); | |
226 | void exec_command_done_array(ExecCommand *c, unsigned n); | |
227 | ||
228 | ExecCommand* exec_command_free_list(ExecCommand *c); | |
229 | void exec_command_free_array(ExecCommand **c, unsigned n); | |
230 | ||
231 | char *exec_command_line(char **argv); | |
232 | ||
233 | void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix); | |
234 | void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix); | |
235 | void exec_command_append_list(ExecCommand **l, ExecCommand *e); | |
236 | int exec_command_set(ExecCommand *c, const char *path, ...); | |
237 | int exec_command_append(ExecCommand *c, const char *path, ...); | |
238 | ||
239 | void exec_context_init(ExecContext *c); | |
240 | void exec_context_done(ExecContext *c); | |
241 | void exec_context_dump(ExecContext *c, FILE* f, const char *prefix); | |
242 | ||
243 | int exec_context_destroy_runtime_directory(ExecContext *c, const char *runtime_root); | |
244 | ||
245 | int exec_context_load_environment(const ExecContext *c, const char *unit_id, char ***l); | |
246 | ||
247 | bool exec_context_may_touch_console(ExecContext *c); | |
248 | bool exec_context_maintains_privileges(ExecContext *c); | |
249 | ||
250 | void exec_status_start(ExecStatus *s, pid_t pid); | |
251 | void exec_status_exit(ExecStatus *s, ExecContext *context, pid_t pid, int code, int status); | |
252 | void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix); | |
253 | ||
254 | int exec_runtime_make(ExecRuntime **rt, ExecContext *c, const char *id); | |
255 | ExecRuntime *exec_runtime_ref(ExecRuntime *r); | |
256 | ExecRuntime *exec_runtime_unref(ExecRuntime *r); | |
257 | ||
258 | int exec_runtime_serialize(ExecRuntime *rt, Unit *u, FILE *f, FDSet *fds); | |
259 | int exec_runtime_deserialize_item(ExecRuntime **rt, Unit *u, const char *key, const char *value, FDSet *fds); | |
260 | ||
261 | void exec_runtime_destroy(ExecRuntime *rt); | |
262 | ||
263 | const char* exec_output_to_string(ExecOutput i) _const_; | |
264 | ExecOutput exec_output_from_string(const char *s) _pure_; | |
265 | ||
266 | const char* exec_input_to_string(ExecInput i) _const_; | |
267 | ExecInput exec_input_from_string(const char *s) _pure_; |