+/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once
-/***
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
typedef struct ExecStatus ExecStatus;
typedef struct ExecCommand ExecCommand;
typedef struct ExecContext ExecContext;
typedef struct ExecRuntime ExecRuntime;
typedef struct ExecParameters ExecParameters;
+typedef struct Manager Manager;
#include <sched.h>
#include <stdbool.h>
#include "namespace.h"
#include "nsflags.h"
+#define EXEC_STDIN_DATA_MAX (64U*1024U*1024U)
+
typedef enum ExecUtmpMode {
EXEC_UTMP_INIT,
EXEC_UTMP_LOGIN,
EXEC_INPUT_TTY_FAIL,
EXEC_INPUT_SOCKET,
EXEC_INPUT_NAMED_FD,
+ EXEC_INPUT_DATA,
+ EXEC_INPUT_FILE,
_EXEC_INPUT_MAX,
_EXEC_INPUT_INVALID = -1
} ExecInput;
EXEC_OUTPUT_JOURNAL_AND_CONSOLE,
EXEC_OUTPUT_SOCKET,
EXEC_OUTPUT_NAMED_FD,
+ EXEC_OUTPUT_FILE,
+ EXEC_OUTPUT_FILE_APPEND,
_EXEC_OUTPUT_MAX,
_EXEC_OUTPUT_INVALID = -1
} ExecOutput;
_EXEC_PRESERVE_MODE_INVALID = -1
} ExecPreserveMode;
+typedef enum ExecKeyringMode {
+ EXEC_KEYRING_INHERIT,
+ EXEC_KEYRING_PRIVATE,
+ EXEC_KEYRING_SHARED,
+ _EXEC_KEYRING_MODE_MAX,
+ _EXEC_KEYRING_MODE_INVALID = -1,
+} ExecKeyringMode;
+
+/* Contains start and exit information about an executed command. */
struct ExecStatus {
+ pid_t pid;
dual_timestamp start_timestamp;
dual_timestamp exit_timestamp;
- pid_t pid;
int code; /* as in siginfo_t::si_code */
int status; /* as in sigingo_t::si_status */
};
typedef enum ExecCommandFlags {
- EXEC_COMMAND_IGNORE_FAILURE = 1,
- EXEC_COMMAND_FULLY_PRIVILEGED = 2,
- EXEC_COMMAND_NO_SETUID = 4,
- EXEC_COMMAND_AMBIENT_MAGIC = 8,
+ EXEC_COMMAND_IGNORE_FAILURE = 1 << 0,
+ EXEC_COMMAND_FULLY_PRIVILEGED = 1 << 1,
+ EXEC_COMMAND_NO_SETUID = 1 << 2,
+ EXEC_COMMAND_AMBIENT_MAGIC = 1 << 3,
} ExecCommandFlags;
+/* Stores information about commands we execute. Covers both configuration settings as well as runtime data. */
struct ExecCommand {
char *path;
char **argv;
LIST_FIELDS(ExecCommand, command); /* useful for chaining commands */
};
+/* Encapsulates certain aspects of the runtime environment that is to be shared between multiple otherwise separate
+ * invocations of commands. Specifically, this allows sharing of /tmp and /var/tmp data as well as network namespaces
+ * between invocations of commands. This is a reference counted object, with one reference taken by each currently
+ * active command invocation that wants to share this runtime. */
struct ExecRuntime {
int n_ref;
+ Manager *manager;
+
+ char *id; /* Unit id of the owner */
+
char *tmp_dir;
char *var_tmp_dir;
EXEC_DIRECTORY_CACHE,
EXEC_DIRECTORY_LOGS,
EXEC_DIRECTORY_CONFIGURATION,
- _EXEC_DIRECTORY_MAX,
- _EXEC_DIRECTORY_INVALID = -1,
+ _EXEC_DIRECTORY_TYPE_MAX,
+ _EXEC_DIRECTORY_TYPE_INVALID = -1,
} ExecDirectoryType;
typedef struct ExecDirectory {
mode_t mode;
} ExecDirectory;
+/* Encodes configuration parameters applied to invoked commands. Does not carry runtime data, but only configuration
+ * changes sourced from unit files and suchlike. ExecContext objects are usually embedded into Unit objects, and do not
+ * change after being loaded. */
struct ExecContext {
char **environment;
char **environment_files;
char **pass_environment;
+ char **unset_environment;
struct rlimit *rlimit[_RLIMIT_MAX];
char *working_directory, *root_directory, *root_image;
ExecOutput std_output;
ExecOutput std_error;
char *stdio_fdname[3];
+ char *stdio_file[3];
+
+ void *stdin_data;
+ size_t stdin_data_size;
nsec_t timer_slack_nsec;
bool smack_process_label_ignore;
char *smack_process_label;
+ ExecKeyringMode keyring_mode;
+
char **read_write_paths, **read_only_paths, **inaccessible_paths;
unsigned long mount_flags;
BindMount *bind_mounts;
- unsigned n_bind_mounts;
+ size_t n_bind_mounts;
+ TemporaryFileSystem *temporary_filesystems;
+ size_t n_temporary_filesystems;
uint64_t capability_bounding_set;
uint64_t capability_ambient_set;
char *syslog_identifier;
bool syslog_level_prefix;
+ int log_level_max;
+
+ struct iovec* log_extra_fields;
+ size_t n_log_extra_fields;
+
bool cpu_sched_reset_on_fork;
bool non_blocking;
bool private_tmp;
bool private_network;
bool private_devices;
bool private_users;
+ bool private_mounts;
ProtectSystem protect_system;
ProtectHome protect_home;
bool protect_kernel_tunables;
bool same_pgrp;
unsigned long personality;
+ bool lock_personality;
unsigned long restrict_namespaces; /* The CLONE_NEWxyz flags permitted to the unit's processes */
- Set *syscall_filter;
+ Hashmap *syscall_filter;
Set *syscall_archs;
int syscall_errno;
bool syscall_whitelist:1;
bool address_families_whitelist:1;
ExecPreserveMode runtime_directory_preserve_mode;
- ExecDirectory directories[_EXEC_DIRECTORY_MAX];
+ ExecDirectory directories[_EXEC_DIRECTORY_TYPE_MAX];
bool memory_deny_write_execute;
bool restrict_realtime;
}
typedef enum ExecFlags {
- EXEC_APPLY_SANDBOXING = 1U << 0,
- EXEC_APPLY_CHROOT = 1U << 1,
- EXEC_APPLY_TTY_STDIN = 1U << 2,
- EXEC_NEW_KEYRING = 1U << 3,
- EXEC_PASS_LOG_UNIT = 1U << 4, /* Whether to pass the unit name to the service's journal stream connection */
- EXEC_CHOWN_DIRECTORIES = 1U << 5, /* chown() the runtime/state/cache/log directories to the user we run as, under all conditions */
- EXEC_NSS_BYPASS_BUS = 1U << 6, /* Set the SYSTEMD_NSS_BYPASS_BUS environment variable, to disable nss-systemd for dbus */
- EXEC_CGROUP_DELEGATE = 1U << 7,
+ EXEC_APPLY_SANDBOXING = 1 << 0,
+ EXEC_APPLY_CHROOT = 1 << 1,
+ EXEC_APPLY_TTY_STDIN = 1 << 2,
+ EXEC_NEW_KEYRING = 1 << 3,
+ EXEC_PASS_LOG_UNIT = 1 << 4, /* Whether to pass the unit name to the service's journal stream connection */
+ EXEC_CHOWN_DIRECTORIES = 1 << 5, /* chown() the runtime/state/cache/log directories to the user we run as, under all conditions */
+ EXEC_NSS_BYPASS_BUS = 1 << 6, /* Set the SYSTEMD_NSS_BYPASS_BUS environment variable, to disable nss-systemd for dbus */
+ EXEC_CGROUP_DELEGATE = 1 << 7,
/* The following are not used by execute.c, but by consumers internally */
- EXEC_PASS_FDS = 1U << 8,
- EXEC_IS_CONTROL = 1U << 9,
- EXEC_SETENV_RESULT = 1U << 10,
- EXEC_SET_WATCHDOG = 1U << 11,
+ EXEC_PASS_FDS = 1 << 8,
+ EXEC_IS_CONTROL = 1 << 9,
+ EXEC_SETENV_RESULT = 1 << 10,
+ EXEC_SET_WATCHDOG = 1 << 11,
} ExecFlags;
+/* Parameters for a specific invocation of a command. This structure is put together right before a command is
+ * executed. */
struct ExecParameters {
- char **argv;
char **environment;
int *fds;
char **fd_names;
- unsigned n_storage_fds;
- unsigned n_socket_fds;
+ size_t n_socket_fds;
+ size_t n_storage_fds;
ExecFlags flags;
bool selinux_context_net:1;
int stdin_fd;
int stdout_fd;
int stderr_fd;
+
+ /* An fd that is closed by the execve(), and thus will result in EOF when the execve() is done */
+ int exec_fd;
};
#include "unit.h"
DynamicCreds *dynamic_creds,
pid_t *ret);
-void exec_command_done(ExecCommand *c);
-void exec_command_done_array(ExecCommand *c, unsigned n);
-
+void exec_command_done_array(ExecCommand *c, size_t n);
ExecCommand* exec_command_free_list(ExecCommand *c);
-void exec_command_free_array(ExecCommand **c, unsigned n);
-
-char *exec_command_line(char **argv);
-
-void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix);
+void exec_command_free_array(ExecCommand **c, size_t n);
+void exec_command_reset_status_array(ExecCommand *c, size_t n);
+void exec_command_reset_status_list_array(ExecCommand **c, size_t n);
void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix);
void exec_command_append_list(ExecCommand **l, ExecCommand *e);
int exec_command_set(ExecCommand *c, const char *path, ...);
void exec_context_init(ExecContext *c);
void exec_context_done(ExecContext *c);
-void exec_context_dump(ExecContext *c, FILE* f, const char *prefix);
+void exec_context_dump(const ExecContext *c, FILE* f, const char *prefix);
-int exec_context_destroy_runtime_directory(ExecContext *c, const char *runtime_root);
+int exec_context_destroy_runtime_directory(const ExecContext *c, const char *runtime_root);
-int exec_context_load_environment(Unit *unit, const ExecContext *c, char ***l);
-int exec_context_named_iofds(Unit *unit, const ExecContext *c, const ExecParameters *p, int named_iofds[3]);
const char* exec_context_fdname(const ExecContext *c, int fd_index);
-bool exec_context_may_touch_console(ExecContext *c);
-bool exec_context_maintains_privileges(ExecContext *c);
+bool exec_context_may_touch_console(const ExecContext *c);
+bool exec_context_maintains_privileges(const ExecContext *c);
-int exec_context_get_effective_ioprio(ExecContext *c);
+int exec_context_get_effective_ioprio(const ExecContext *c);
-void exec_status_start(ExecStatus *s, pid_t pid);
-void exec_status_exit(ExecStatus *s, ExecContext *context, pid_t pid, int code, int status);
-void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix);
+void exec_context_free_log_extra_fields(ExecContext *c);
-int exec_runtime_make(ExecRuntime **rt, ExecContext *c, const char *id);
-ExecRuntime *exec_runtime_ref(ExecRuntime *r);
-ExecRuntime *exec_runtime_unref(ExecRuntime *r);
+void exec_status_start(ExecStatus *s, pid_t pid);
+void exec_status_exit(ExecStatus *s, const ExecContext *context, pid_t pid, int code, int status);
+void exec_status_dump(const ExecStatus *s, FILE *f, const char *prefix);
+void exec_status_reset(ExecStatus *s);
-int exec_runtime_serialize(Unit *unit, ExecRuntime *rt, FILE *f, FDSet *fds);
-int exec_runtime_deserialize_item(Unit *unit, ExecRuntime **rt, const char *key, const char *value, FDSet *fds);
+int exec_runtime_acquire(Manager *m, const ExecContext *c, const char *name, bool create, ExecRuntime **ret);
+ExecRuntime *exec_runtime_unref(ExecRuntime *r, bool destroy);
-void exec_runtime_destroy(ExecRuntime *rt);
+int exec_runtime_serialize(const Manager *m, FILE *f, FDSet *fds);
+int exec_runtime_deserialize_compat(Unit *u, const char *key, const char *value, FDSet *fds);
+void exec_runtime_deserialize_one(Manager *m, const char *value, FDSet *fds);
+void exec_runtime_vacuum(Manager *m);
const char* exec_output_to_string(ExecOutput i) _const_;
ExecOutput exec_output_from_string(const char *s) _pure_;
const char* exec_preserve_mode_to_string(ExecPreserveMode i) _const_;
ExecPreserveMode exec_preserve_mode_from_string(const char *s) _pure_;
+const char* exec_keyring_mode_to_string(ExecKeyringMode i) _const_;
+ExecKeyringMode exec_keyring_mode_from_string(const char *s) _pure_;
+
const char* exec_directory_type_to_string(ExecDirectoryType i) _const_;
ExecDirectoryType exec_directory_type_from_string(const char *s) _pure_;
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