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
84 dual_timestamp start_timestamp
;
85 dual_timestamp exit_timestamp
;
87 int code
; /* as in siginfo_t::si_code */
88 int status
; /* as in sigingo_t::si_status */
94 ExecStatus exec_status
;
95 LIST_FIELDS(ExecCommand
, command
); /* useful for chaining commands */
106 /* An AF_UNIX socket pair, that contains a datagram containing a file descriptor referring to the network
108 int netns_storage_socket
[2];
113 char **environment_files
;
114 char **pass_environment
;
116 struct rlimit
*rlimit
[_RLIMIT_MAX
];
117 char *working_directory
, *root_directory
, *root_image
;
118 bool working_directory_missing_ok
;
119 bool working_directory_home
;
122 int oom_score_adjust
;
125 int cpu_sched_policy
;
126 int cpu_sched_priority
;
129 unsigned cpuset_ncpus
;
132 ExecOutput std_output
;
133 ExecOutput std_error
;
134 char *stdio_fdname
[3];
136 nsec_t timer_slack_nsec
;
144 bool tty_vt_disallocate
;
148 /* Since resolving these names might involve socket
149 * connections and we don't want to deadlock ourselves these
150 * names are resolved on execution only and in the child
154 char **supplementary_groups
;
159 ExecUtmpMode utmp_mode
;
161 bool selinux_context_ignore
;
162 char *selinux_context
;
164 bool apparmor_profile_ignore
;
165 char *apparmor_profile
;
167 bool smack_process_label_ignore
;
168 char *smack_process_label
;
170 char **read_write_paths
, **read_only_paths
, **inaccessible_paths
;
171 unsigned long mount_flags
;
172 BindMount
*bind_mounts
;
173 unsigned n_bind_mounts
;
175 uint64_t capability_bounding_set
;
176 uint64_t capability_ambient_set
;
180 char *syslog_identifier
;
181 bool syslog_level_prefix
;
183 bool cpu_sched_reset_on_fork
;
186 bool private_network
;
187 bool private_devices
;
189 ProtectSystem protect_system
;
190 ProtectHome protect_home
;
191 bool protect_kernel_tunables
;
192 bool protect_kernel_modules
;
193 bool protect_control_groups
;
196 bool no_new_privileges
;
201 /* This is not exposed to the user but available
202 * internally. We need it to make sure that whenever we spawn
203 * /usr/bin/mount it is run in the same process group as us so
204 * that the autofs logic detects that it belongs to us and we
205 * don't enter a trigger loop. */
208 unsigned long personality
;
210 unsigned long restrict_namespaces
; /* The CLONE_NEWxyz flags permitted to the unit's processes */
215 bool syscall_whitelist
:1;
217 Set
*address_families
;
218 bool address_families_whitelist
:1;
220 char **runtime_directory
;
221 mode_t runtime_directory_mode
;
222 ExecPreserveMode runtime_directory_preserve_mode
;
224 bool memory_deny_write_execute
;
225 bool restrict_realtime
;
227 bool oom_score_adjust_set
:1;
230 bool cpu_sched_set
:1;
233 static inline bool exec_context_restrict_namespaces_set(const ExecContext
*c
) {
236 return (c
->restrict_namespaces
& NAMESPACE_FLAGS_ALL
) != NAMESPACE_FLAGS_ALL
;
239 typedef enum ExecFlags
{
240 EXEC_APPLY_PERMISSIONS
= 1U << 0,
241 EXEC_APPLY_CHROOT
= 1U << 1,
242 EXEC_APPLY_TTY_STDIN
= 1U << 2,
243 EXEC_NEW_KEYRING
= 1U << 3,
245 /* The following are not used by execute.c, but by consumers internally */
246 EXEC_PASS_FDS
= 1U << 4,
247 EXEC_IS_CONTROL
= 1U << 5,
248 EXEC_SETENV_RESULT
= 1U << 6,
249 EXEC_SET_WATCHDOG
= 1U << 7,
252 struct ExecParameters
{
258 unsigned n_storage_fds
;
259 unsigned n_socket_fds
;
262 bool selinux_context_net
:1;
264 bool cgroup_delegate
:1;
265 CGroupMask cgroup_supported
;
266 const char *cgroup_path
;
268 const char *runtime_prefix
;
270 const char *confirm_spawn
;
272 usec_t watchdog_usec
;
282 #include "dynamic-user.h"
284 int exec_spawn(Unit
*unit
,
285 ExecCommand
*command
,
286 const ExecContext
*context
,
287 const ExecParameters
*exec_params
,
288 ExecRuntime
*runtime
,
289 DynamicCreds
*dynamic_creds
,
292 void exec_command_done(ExecCommand
*c
);
293 void exec_command_done_array(ExecCommand
*c
, unsigned n
);
295 ExecCommand
* exec_command_free_list(ExecCommand
*c
);
296 void exec_command_free_array(ExecCommand
**c
, unsigned n
);
298 char *exec_command_line(char **argv
);
300 void exec_command_dump(ExecCommand
*c
, FILE *f
, const char *prefix
);
301 void exec_command_dump_list(ExecCommand
*c
, FILE *f
, const char *prefix
);
302 void exec_command_append_list(ExecCommand
**l
, ExecCommand
*e
);
303 int exec_command_set(ExecCommand
*c
, const char *path
, ...);
304 int exec_command_append(ExecCommand
*c
, const char *path
, ...);
306 void exec_context_init(ExecContext
*c
);
307 void exec_context_done(ExecContext
*c
);
308 void exec_context_dump(ExecContext
*c
, FILE* f
, const char *prefix
);
310 int exec_context_destroy_runtime_directory(ExecContext
*c
, const char *runtime_root
);
312 int exec_context_load_environment(Unit
*unit
, const ExecContext
*c
, char ***l
);
313 int exec_context_named_iofds(Unit
*unit
, const ExecContext
*c
, const ExecParameters
*p
, int named_iofds
[3]);
314 const char* exec_context_fdname(const ExecContext
*c
, int fd_index
);
316 bool exec_context_may_touch_console(ExecContext
*c
);
317 bool exec_context_maintains_privileges(ExecContext
*c
);
319 int exec_context_get_effective_ioprio(ExecContext
*c
);
321 void exec_status_start(ExecStatus
*s
, pid_t pid
);
322 void exec_status_exit(ExecStatus
*s
, ExecContext
*context
, pid_t pid
, int code
, int status
);
323 void exec_status_dump(ExecStatus
*s
, FILE *f
, const char *prefix
);
325 int exec_runtime_make(ExecRuntime
**rt
, ExecContext
*c
, const char *id
);
326 ExecRuntime
*exec_runtime_ref(ExecRuntime
*r
);
327 ExecRuntime
*exec_runtime_unref(ExecRuntime
*r
);
329 int exec_runtime_serialize(Unit
*unit
, ExecRuntime
*rt
, FILE *f
, FDSet
*fds
);
330 int exec_runtime_deserialize_item(Unit
*unit
, ExecRuntime
**rt
, const char *key
, const char *value
, FDSet
*fds
);
332 void exec_runtime_destroy(ExecRuntime
*rt
);
334 const char* exec_output_to_string(ExecOutput i
) _const_
;
335 ExecOutput
exec_output_from_string(const char *s
) _pure_
;
337 const char* exec_input_to_string(ExecInput i
) _const_
;
338 ExecInput
exec_input_from_string(const char *s
) _pure_
;
340 const char* exec_utmp_mode_to_string(ExecUtmpMode i
) _const_
;
341 ExecUtmpMode
exec_utmp_mode_from_string(const char *s
) _pure_
;
343 const char* exec_preserve_mode_to_string(ExecPreserveMode i
) _const_
;
344 ExecPreserveMode
exec_preserve_mode_from_string(const char *s
) _pure_
;