4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
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
11 (at your option) any later version.
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
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
22 typedef struct ExecStatus ExecStatus
;
23 typedef struct ExecCommand ExecCommand
;
24 typedef struct ExecContext ExecContext
;
25 typedef struct ExecRuntime ExecRuntime
;
26 typedef struct ExecParameters ExecParameters
;
31 #include <sys/capability.h>
33 #include "cgroup-util.h"
37 #include "namespace.h"
40 typedef enum ExecUtmpMode
{
45 _EXEC_UTMP_MODE_INVALID
= -1
48 typedef enum ExecInput
{
56 _EXEC_INPUT_INVALID
= -1
59 typedef enum ExecOutput
{
64 EXEC_OUTPUT_SYSLOG_AND_CONSOLE
,
66 EXEC_OUTPUT_KMSG_AND_CONSOLE
,
68 EXEC_OUTPUT_JOURNAL_AND_CONSOLE
,
72 _EXEC_OUTPUT_INVALID
= -1
75 typedef enum ExecPreserveMode
{
78 EXEC_PRESERVE_RESTART
,
79 _EXEC_PRESERVE_MODE_MAX
,
80 _EXEC_PRESERVE_MODE_INVALID
= -1
83 typedef enum ExecKeyringMode
{
87 _EXEC_KEYRING_MODE_MAX
,
88 _EXEC_KEYRING_MODE_INVALID
= -1,
92 dual_timestamp start_timestamp
;
93 dual_timestamp exit_timestamp
;
95 int code
; /* as in siginfo_t::si_code */
96 int status
; /* as in sigingo_t::si_status */
99 typedef enum ExecCommandFlags
{
100 EXEC_COMMAND_IGNORE_FAILURE
= 1,
101 EXEC_COMMAND_FULLY_PRIVILEGED
= 2,
102 EXEC_COMMAND_NO_SETUID
= 4,
103 EXEC_COMMAND_AMBIENT_MAGIC
= 8,
109 ExecStatus exec_status
;
110 ExecCommandFlags flags
;
111 LIST_FIELDS(ExecCommand
, command
); /* useful for chaining commands */
120 /* An AF_UNIX socket pair, that contains a datagram containing a file descriptor referring to the network
122 int netns_storage_socket
[2];
125 typedef enum ExecDirectoryType
{
126 EXEC_DIRECTORY_RUNTIME
= 0,
127 EXEC_DIRECTORY_STATE
,
128 EXEC_DIRECTORY_CACHE
,
130 EXEC_DIRECTORY_CONFIGURATION
,
132 _EXEC_DIRECTORY_INVALID
= -1,
135 typedef struct ExecDirectory
{
142 char **environment_files
;
143 char **pass_environment
;
144 char **unset_environment
;
146 struct rlimit
*rlimit
[_RLIMIT_MAX
];
147 char *working_directory
, *root_directory
, *root_image
;
148 bool working_directory_missing_ok
;
149 bool working_directory_home
;
152 int oom_score_adjust
;
155 int cpu_sched_policy
;
156 int cpu_sched_priority
;
159 unsigned cpuset_ncpus
;
162 ExecOutput std_output
;
163 ExecOutput std_error
;
164 char *stdio_fdname
[3];
166 nsec_t timer_slack_nsec
;
174 bool tty_vt_disallocate
;
178 /* Since resolving these names might involve socket
179 * connections and we don't want to deadlock ourselves these
180 * names are resolved on execution only and in the child
184 char **supplementary_groups
;
189 ExecUtmpMode utmp_mode
;
191 bool selinux_context_ignore
;
192 char *selinux_context
;
194 bool apparmor_profile_ignore
;
195 char *apparmor_profile
;
197 bool smack_process_label_ignore
;
198 char *smack_process_label
;
200 ExecKeyringMode keyring_mode
;
202 char **read_write_paths
, **read_only_paths
, **inaccessible_paths
;
203 unsigned long mount_flags
;
204 BindMount
*bind_mounts
;
205 unsigned n_bind_mounts
;
207 uint64_t capability_bounding_set
;
208 uint64_t capability_ambient_set
;
212 char *syslog_identifier
;
213 bool syslog_level_prefix
;
215 bool cpu_sched_reset_on_fork
;
218 bool private_network
;
219 bool private_devices
;
221 ProtectSystem protect_system
;
222 ProtectHome protect_home
;
223 bool protect_kernel_tunables
;
224 bool protect_kernel_modules
;
225 bool protect_control_groups
;
228 bool no_new_privileges
;
233 /* This is not exposed to the user but available
234 * internally. We need it to make sure that whenever we spawn
235 * /usr/bin/mount it is run in the same process group as us so
236 * that the autofs logic detects that it belongs to us and we
237 * don't enter a trigger loop. */
240 unsigned long personality
;
241 bool lock_personality
;
243 unsigned long restrict_namespaces
; /* The CLONE_NEWxyz flags permitted to the unit's processes */
248 bool syscall_whitelist
:1;
250 Set
*address_families
;
251 bool address_families_whitelist
:1;
253 ExecPreserveMode runtime_directory_preserve_mode
;
254 ExecDirectory directories
[_EXEC_DIRECTORY_MAX
];
256 bool memory_deny_write_execute
;
257 bool restrict_realtime
;
259 bool oom_score_adjust_set
:1;
262 bool cpu_sched_set
:1;
265 static inline bool exec_context_restrict_namespaces_set(const ExecContext
*c
) {
268 return (c
->restrict_namespaces
& NAMESPACE_FLAGS_ALL
) != NAMESPACE_FLAGS_ALL
;
271 typedef enum ExecFlags
{
272 EXEC_APPLY_SANDBOXING
= 1U << 0,
273 EXEC_APPLY_CHROOT
= 1U << 1,
274 EXEC_APPLY_TTY_STDIN
= 1U << 2,
275 EXEC_NEW_KEYRING
= 1U << 3,
276 EXEC_PASS_LOG_UNIT
= 1U << 4, /* Whether to pass the unit name to the service's journal stream connection */
277 EXEC_CHOWN_DIRECTORIES
= 1U << 5, /* chown() the runtime/state/cache/log directories to the user we run as, under all conditions */
278 EXEC_NSS_BYPASS_BUS
= 1U << 6, /* Set the SYSTEMD_NSS_BYPASS_BUS environment variable, to disable nss-systemd for dbus */
279 EXEC_CGROUP_DELEGATE
= 1U << 7,
281 /* The following are not used by execute.c, but by consumers internally */
282 EXEC_PASS_FDS
= 1U << 8,
283 EXEC_IS_CONTROL
= 1U << 9,
284 EXEC_SETENV_RESULT
= 1U << 10,
285 EXEC_SET_WATCHDOG
= 1U << 11,
288 struct ExecParameters
{
294 unsigned n_storage_fds
;
295 unsigned n_socket_fds
;
298 bool selinux_context_net
:1;
300 CGroupMask cgroup_supported
;
301 const char *cgroup_path
;
305 const char *confirm_spawn
;
307 usec_t watchdog_usec
;
317 #include "dynamic-user.h"
319 int exec_spawn(Unit
*unit
,
320 ExecCommand
*command
,
321 const ExecContext
*context
,
322 const ExecParameters
*exec_params
,
323 ExecRuntime
*runtime
,
324 DynamicCreds
*dynamic_creds
,
327 void exec_command_done(ExecCommand
*c
);
328 void exec_command_done_array(ExecCommand
*c
, unsigned n
);
330 ExecCommand
* exec_command_free_list(ExecCommand
*c
);
331 void exec_command_free_array(ExecCommand
**c
, unsigned n
);
333 char *exec_command_line(char **argv
);
335 void exec_command_dump(ExecCommand
*c
, FILE *f
, const char *prefix
);
336 void exec_command_dump_list(ExecCommand
*c
, FILE *f
, const char *prefix
);
337 void exec_command_append_list(ExecCommand
**l
, ExecCommand
*e
);
338 int exec_command_set(ExecCommand
*c
, const char *path
, ...);
339 int exec_command_append(ExecCommand
*c
, const char *path
, ...);
341 void exec_context_init(ExecContext
*c
);
342 void exec_context_done(ExecContext
*c
);
343 void exec_context_dump(ExecContext
*c
, FILE* f
, const char *prefix
);
345 int exec_context_destroy_runtime_directory(ExecContext
*c
, const char *runtime_root
);
347 int exec_context_load_environment(Unit
*unit
, const ExecContext
*c
, char ***l
);
348 int exec_context_named_iofds(Unit
*unit
, const ExecContext
*c
, const ExecParameters
*p
, int named_iofds
[3]);
349 const char* exec_context_fdname(const ExecContext
*c
, int fd_index
);
351 bool exec_context_may_touch_console(ExecContext
*c
);
352 bool exec_context_maintains_privileges(ExecContext
*c
);
354 int exec_context_get_effective_ioprio(ExecContext
*c
);
356 void exec_status_start(ExecStatus
*s
, pid_t pid
);
357 void exec_status_exit(ExecStatus
*s
, ExecContext
*context
, pid_t pid
, int code
, int status
);
358 void exec_status_dump(ExecStatus
*s
, FILE *f
, const char *prefix
);
360 int exec_runtime_make(ExecRuntime
**rt
, ExecContext
*c
, const char *id
);
361 ExecRuntime
*exec_runtime_ref(ExecRuntime
*r
);
362 ExecRuntime
*exec_runtime_unref(ExecRuntime
*r
);
364 int exec_runtime_serialize(Unit
*unit
, ExecRuntime
*rt
, FILE *f
, FDSet
*fds
);
365 int exec_runtime_deserialize_item(Unit
*unit
, ExecRuntime
**rt
, const char *key
, const char *value
, FDSet
*fds
);
367 void exec_runtime_destroy(ExecRuntime
*rt
);
369 const char* exec_output_to_string(ExecOutput i
) _const_
;
370 ExecOutput
exec_output_from_string(const char *s
) _pure_
;
372 const char* exec_input_to_string(ExecInput i
) _const_
;
373 ExecInput
exec_input_from_string(const char *s
) _pure_
;
375 const char* exec_utmp_mode_to_string(ExecUtmpMode i
) _const_
;
376 ExecUtmpMode
exec_utmp_mode_from_string(const char *s
) _pure_
;
378 const char* exec_preserve_mode_to_string(ExecPreserveMode i
) _const_
;
379 ExecPreserveMode
exec_preserve_mode_from_string(const char *s
) _pure_
;
381 const char* exec_keyring_mode_to_string(ExecKeyringMode i
) _const_
;
382 ExecKeyringMode
exec_keyring_mode_from_string(const char *s
) _pure_
;
384 const char* exec_directory_type_to_string(ExecDirectoryType i
) _const_
;
385 ExecDirectoryType
exec_directory_type_from_string(const char *s
) _pure_
;