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260 lines
8.3 KiB
C
260 lines
8.3 KiB
C
/*-*- Mode: C; c-basic-offset: 8 -*-*/
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#ifndef foomanagerhfoo
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#define foomanagerhfoo
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <stdbool.h>
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#include <inttypes.h>
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#include <stdio.h>
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#include <dbus/dbus.h>
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#include "fdset.h"
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typedef struct Manager Manager;
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typedef enum WatchType WatchType;
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typedef struct Watch Watch;
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typedef enum ManagerExitCode {
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MANAGER_RUNNING,
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MANAGER_EXIT,
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MANAGER_RELOAD,
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MANAGER_REEXECUTE,
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_MANAGER_EXIT_CODE_MAX,
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_MANAGER_EXIT_CODE_INVALID = -1
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} ManagerExitCode;
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typedef enum ManagerRunningAs {
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MANAGER_INIT, /* root and pid=1 */
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MANAGER_SYSTEM, /* root and pid!=1 */
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MANAGER_SESSION, /* non-root, for a session */
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_MANAGER_RUNNING_AS_MAX,
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_MANAGER_RUNNING_AS_INVALID = -1
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} ManagerRunningAs;
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enum WatchType {
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WATCH_INVALID,
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WATCH_SIGNAL,
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WATCH_FD,
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WATCH_TIMER,
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WATCH_MOUNT,
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WATCH_UDEV,
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WATCH_DBUS_WATCH,
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WATCH_DBUS_TIMEOUT
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};
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struct Watch {
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int fd;
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WatchType type;
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bool fd_is_dupped;
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union {
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union Unit *unit;
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DBusWatch *bus_watch;
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DBusTimeout *bus_timeout;
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bool socket_accept;
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} data;
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};
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#include "unit.h"
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#include "job.h"
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#include "hashmap.h"
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#include "list.h"
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#include "set.h"
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#include "dbus.h"
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#define SPECIAL_DEFAULT_TARGET "default.target"
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#define SPECIAL_LOGGER_SOCKET "systemd-logger.socket"
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#define SPECIAL_KBREQUEST_TARGET "kbrequest.target"
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#define SPECIAL_SIGPWR_TARGET "sigpwr.target"
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#define SPECIAL_CTRL_ALT_DEL_TARGET "ctrl-alt-del.target"
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#define SPECIAL_LOCAL_FS_TARGET "local-fs.target"
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#define SPECIAL_REMOTE_FS_TARGET "remote-fs.target"
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#define SPECIAL_NETWORK_TARGET "network.target"
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#define SPECIAL_NSS_LOOKUP_TARGET "nss-lookup.target" /* LSB's $named */
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#define SPECIAL_RPCBIND_TARGET "rpcbind.target" /* LSB's $portmap */
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#define SPECIAL_SYSLOG_TARGET "syslog.target" /* Should pull in syslog.socket or syslog.service */
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#define SPECIAL_RTC_SET_TARGET "rtc-set.target" /* LSB's $time */
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#define SPECIAL_BASIC_TARGET "basic.target"
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#define SPECIAL_RESCUE_TARGET "rescue.target"
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#ifndef SPECIAL_DBUS_SERVICE
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#define SPECIAL_DBUS_SERVICE "dbus.service"
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#endif
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#ifndef SPECIAL_SYSLOG_SERVICE
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#define SPECIAL_SYSLOG_SERVICE "syslog.service"
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#endif
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/* For SysV compatibility. Usually an alias for a saner target. On
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* SysV-free systems this doesn't exist. */
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#define SPECIAL_RUNLEVEL0_TARGET "runlevel0.target"
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#define SPECIAL_RUNLEVEL1_TARGET "runlevel1.target"
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#define SPECIAL_RUNLEVEL2_TARGET "runlevel2.target"
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#define SPECIAL_RUNLEVEL3_TARGET "runlevel3.target"
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#define SPECIAL_RUNLEVEL4_TARGET "runlevel4.target"
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#define SPECIAL_RUNLEVEL5_TARGET "runlevel5.target"
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#define SPECIAL_RUNLEVEL6_TARGET "runlevel6.target"
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struct Manager {
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uint32_t current_job_id;
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/* Note that the set of units we know of is allowed to be
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* incosistent. However the subset of it that is loaded may
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* not, and the list of jobs may neither. */
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/* Active jobs and units */
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Hashmap *units; /* name string => Unit object n:1 */
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Hashmap *jobs; /* job id => Job object 1:1 */
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/* To make it easy to iterate through the units of a specific
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* type we maintain a per type linked list */
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LIST_HEAD(Meta, units_per_type[_UNIT_TYPE_MAX]);
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/* Units that need to be loaded */
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LIST_HEAD(Meta, load_queue); /* this is actually more a stack than a queue, but uh. */
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/* Jobs that need to be run */
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LIST_HEAD(Job, run_queue); /* more a stack than a queue, too */
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/* Units and jobs that have not yet been announced via
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* D-Bus. When something about a job changes it is added here
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* if it is not in there yet. This allows easy coalescing of
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* D-Bus change signals. */
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LIST_HEAD(Meta, dbus_unit_queue);
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LIST_HEAD(Job, dbus_job_queue);
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LIST_HEAD(Meta, cleanup_queue);
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/* Jobs to be added */
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Hashmap *transaction_jobs; /* Unit object => Job object list 1:1 */
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JobDependency *transaction_anchor;
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bool dispatching_load_queue:1;
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bool dispatching_run_queue:1;
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bool dispatching_dbus_queue:1;
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bool request_api_bus_dispatch:1;
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bool request_system_bus_dispatch:1;
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bool utmp_reboot_written:1;
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bool confirm_spawn:1;
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ManagerExitCode exit_code:4;
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ManagerRunningAs running_as;
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Hashmap *watch_pids; /* pid => Unit object n:1 */
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int epoll_fd;
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Watch signal_watch;
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char **unit_path;
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char **sysvinit_path;
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char **sysvrcnd_path;
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usec_t boot_timestamp;
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/* Data specific to the device subsystem */
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struct udev* udev;
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struct udev_monitor* udev_monitor;
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Watch udev_watch;
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/* Data specific to the mount subsystem */
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FILE *proc_self_mountinfo;
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Watch mount_watch;
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/* Data specific to the D-Bus subsystem */
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DBusConnection *api_bus, *system_bus;
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Set *subscribed;
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DBusMessage *queued_message; /* This is used during reloading:
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* before the reload we queue the
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* reply message here, and
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* afterwards we send it */
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Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */
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int32_t name_data_slot;
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/* Data specific to the cgroup subsystem */
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Hashmap *cgroup_bondings; /* path string => CGroupBonding object 1:n */
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char *cgroup_controller;
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char *cgroup_hierarchy;
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/* Data specific to the Automount subsystem */
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int dev_autofs_fd;
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/* Data specific to the Snapshot subsystem */
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unsigned n_snapshots;
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};
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int manager_new(ManagerRunningAs running_as, bool confirm_spawn, Manager **m);
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void manager_free(Manager *m);
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int manager_enumerate(Manager *m);
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int manager_coldplug(Manager *m);
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int manager_startup(Manager *m, FILE *serialization, FDSet *fds);
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Job *manager_get_job(Manager *m, uint32_t id);
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Unit *manager_get_unit(Manager *m, const char *name);
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int manager_get_unit_from_dbus_path(Manager *m, const char *s, Unit **_u);
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int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j);
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int manager_load_unit(Manager *m, const char *name, const char *path, Unit **_ret);
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int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, Job **_ret);
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int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool force, Job **_ret);
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void manager_dump_units(Manager *s, FILE *f, const char *prefix);
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void manager_dump_jobs(Manager *s, FILE *f, const char *prefix);
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void manager_transaction_unlink_job(Manager *m, Job *j, bool delete_dependencies);
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void manager_clear_jobs(Manager *m);
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unsigned manager_dispatch_load_queue(Manager *m);
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unsigned manager_dispatch_run_queue(Manager *m);
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unsigned manager_dispatch_dbus_queue(Manager *m);
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int manager_loop(Manager *m);
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void manager_write_utmp_reboot(Manager *m);
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void manager_write_utmp_runlevel(Manager *m, Unit *t);
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void manager_dispatch_bus_name_owner_changed(Manager *m, const char *name, const char* old_owner, const char *new_owner);
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void manager_dispatch_bus_query_pid_done(Manager *m, const char *name, pid_t pid);
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int manager_open_serialization(FILE **_f);
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int manager_serialize(Manager *m, FILE *f, FDSet *fds);
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int manager_deserialize(Manager *m, FILE *f, FDSet *fds);
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int manager_reload(Manager *m);
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const char *manager_running_as_to_string(ManagerRunningAs i);
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ManagerRunningAs manager_running_as_from_string(const char *s);
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#endif
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