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systemctl: reimplement systemctl in pure C without Vala/GObject

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This commit is contained in:
Lennart Poettering 2010-06-15 02:51:55 +02:00
parent fb1af5b0fe
commit 7e4249b94e
5 changed files with 1496 additions and 368 deletions
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15
Makefile.am
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@ -343,6 +343,13 @@ systemd_cgroups_agent_CPPFLAGS = \
systemd_cgroups_agent_LDADD = \
$(DBUS_LIBS)
systemctl_SOURCES = \
src/systemctl.c \
$(BASIC_SOURCES)
systemctl_CPPFLAGS = $(AM_CPPFLAGS) $(DBUS_CFLAGS)
systemctl_LDADD = $(DBUS_LIBS)
VALAFLAGS = \
-g \
--save-temps \
@ -358,13 +365,6 @@ VALA_CFLAGS = \
-Wno-unused-variable \
-Wno-unused-function
systemctl_SOURCES = \
src/systemctl.vala \
src/systemd-interfaces.vala
systemctl_CPPFLAGS = $(AM_CPPFLAGS) $(DBUSGLIB_CFLAGS) $(VALA_CFLAGS)
systemctl_LDADD = $(DBUSGLIB_LIBS)
systemadm_SOURCES = \
src/systemadm.vala \
src/systemd-interfaces.vala
@ -417,7 +417,6 @@ CLEANFILES = \
if HAVE_VALAC
CLEANFILES += \
src/systemd-interfaces.c \
src/systemctl.c \
src/systemadm.c
endif

6
fixme
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@ -54,8 +54,6 @@
- bluetoothd (/var/run/sdp! @/org/bluez/audio!)
- distccd
* teach dbus to talk to systemd when autospawning services
* regnerate unit/sysv search paths on daemon reload
* write utmp record a la upstart for processes
@ -66,6 +64,10 @@
* use setproctitle() when forking, before exec() (waiting for (PR_SET_PROCTITLE_AREA to enter the kernel)
* s/maintainance/maintenance/
* follow property change dbus spec
Regularly:
* look for close() vs. close_nointr() vs. close_nointr_nofail()

1
src/.gitignore vendored
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@ -1,3 +1,2 @@
systemctl.c
systemd-interfaces.c
systemadm.c

1485
src/systemctl.c Normal file
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File diff suppressed because it is too large Load Diff

357
src/systemctl.vala
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@ -1,357 +0,0 @@
/***
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 General Public License as published by
the Free Software Foundation; either version 2 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
using DBus;
using GLib;
static string type = null;
static bool all = false;
static bool replace = false;
static bool session = false;
static bool block = false;
static Connection? bus = null;
static List<ObjectPath> jobs = null;
static MainLoop main_loop = null;
static int exit_code = 0;
public static int job_info_compare(void* key1, void* key2) {
Manager.JobInfo *j1 = (Manager.JobInfo*) key1;
Manager.JobInfo *j2 = (Manager.JobInfo*) key2;
return j1->id < j2->id ? -1 : (j1->id > j2->id ? 1 : 0);
}
public static int unit_info_compare(void* key1, void* key2) {
Manager.UnitInfo *u1 = (Manager.UnitInfo*) key1;
Manager.UnitInfo *u2 = (Manager.UnitInfo*) key2;
int r = Posix.strcmp(Posix.strrchr(u1->id, '.'), Posix.strrchr(u2->id, '.'));
if (r != 0)
return r;
return Posix.strcmp(u1->id, u2->id);
}
public void monitor_on_unit_changed(Unit u) {
stdout.printf("Unit %s changed.\n", u.id);
}
public void monitor_on_unit_new(string id, ObjectPath path) {
stdout.printf("Unit %s added.\n", id);
Unit u = bus.get_object(
"org.freedesktop.systemd1",
path,
"org.freedesktop.systemd1.Unit") as Unit;
u.changed += monitor_on_unit_changed;
/* FIXME: We leak memory here */
u.ref();
}
public void monitor_on_job_changed(Job j) {
stdout.printf("Job %u changed.\n", j.id);
}
public void monitor_on_job_new(uint32 id, ObjectPath path) {
stdout.printf("Job %u added.\n", id);
Job j = bus.get_object(
"org.freedesktop.systemd1",
path,
"org.freedesktop.systemd1.Job") as Job;
j.changed += monitor_on_job_changed;
/* FIXME: We leak memory here */
j.ref();
}
public void monitor_on_unit_removed(string id, ObjectPath path) {
stdout.printf("Unit %s removed.\n", id);
}
public void monitor_on_job_removed(uint32 id, ObjectPath path, bool success) {
stdout.printf("Job %u removed (success=%i).\n", id, (int) success);
}
public void block_on_job_removed(uint32 id, ObjectPath path, bool success) {
for (unowned List<ObjectPath> i = jobs; i != null; i = i.next)
if (i.data == path) {
jobs.remove_link(i);
break;
}
if (jobs == null) {
if (!success)
exit_code = 1;
main_loop.quit();
}
}
static const OptionEntry entries[] = {
{ "type", 't', 0, OptionArg.STRING, out type, "List only particular type of units", "TYPE" },
{ "all", 'a', 0, OptionArg.NONE, out all, "Show all units, including dead ones", null },
{ "replace", 0, 0, OptionArg.NONE, out replace, "When installing a new job, replace existing conflicting ones", null },
{ "session", 0, 0, OptionArg.NONE, out session, "Connect to session bus", null },
{ "system", 0, OptionFlags.REVERSE, OptionArg.NONE, out session, "Connect to system bus", null },
{ "block", 0, 0, OptionArg.NONE, out block, "Wait until the operation finished", null },
{ null }
};
int main (string[] args) {
OptionContext context = new OptionContext("[COMMAND [ARGUMENT...]]");
context.add_main_entries(entries, null);
context.set_description(
"Commands:\n" +
" list-units List units\n" +
" list-jobs List jobs\n" +
" clear-jobs Cancel all jobs\n" +
" load [NAME...] Load one or more units\n" +
" cancel [JOB...] Cancel one or more jobs\n" +
" start [NAME...] Start one or more units\n" +
" stop [NAME...] Stop one or more units\n" +
" restart [NAME...] Restart one or more units\n" +
" reload [NAME...] Reload one or more units\n" +
" isolate [NAME] Start one unit and stop all others\n" +
" monitor Monitor unit/job changes\n" +
" dump Dump server status\n" +
" snapshot [NAME] Create a snapshot\n" +
" daemon-reload Reload daemon configuration\n" +
" daemon-reexecute Reexecute daemon\n" +
" daemon-exit Ask the daemon to quit\n" +
" show-environment Dump environment\n" +
" set-environment [NAME=VALUE...] Set one or more environment variables\n" +
" unset-environment [NAME...] Unset one or more environment variables\n");
try {
context.parse(ref args);
} catch (GLib.OptionError e) {
message("Failed to parse command line: %s".printf(e.message));
}
try {
bus = Bus.get(session ? BusType.SESSION : BusType.SYSTEM);
Manager manager = bus.get_object (
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager") as Manager;
if (args[1] == "list-units" || args.length <= 1) {
var list = manager.list_units();
uint n = 0;
Posix.qsort(list, list.length, sizeof(Manager.UnitInfo), unit_info_compare);
stdout.printf("%-45s %-6s %-12s %-12s %-17s\n", "UNIT", "LOAD", "ACTIVE", "SUB", "JOB");
foreach (var i in list) {
if (type != null && !i.id.has_suffix(".%s".printf(type)))
continue;
if (!all && i.active_state == "inactive")
continue;
stdout.printf("%-45s %-6s %-12s %-12s", i.id, i.load_state, i.active_state, i.sub_state);
if (i.job_id != 0)
stdout.printf(" -> %-15s", i.job_type);
stdout.puts("\n");
n++;
}
if (all)
stdout.printf("\n%u units listed.\n", n);
else
stdout.printf("\n%u live units listed. Pass --all to see dead units, too.\n", n);
} else if (args[1] == "list-jobs") {
var list = manager.list_jobs();
Posix.qsort(list, list.length, sizeof(Manager.JobInfo), job_info_compare);
stdout.printf("%4s %-45s %-17s %-7s\n", "JOB", "UNIT", "TYPE", "STATE");
foreach (var i in list)
stdout.printf("%4u %-45s → %-15s %-7s\n", i.id, i.name, i.type, i.state);
stdout.printf("\n%u jobs listed.\n", list.length);
} else if (args[1] == "clear-jobs") {
manager.clear_jobs();
} else if (args[1] == "load") {
if (args.length < 3) {
stderr.printf("Missing argument.\n");
return 1;
}
for (int i = 2; i < args.length; i++)
manager.load_unit(args[i]);
} else if (args[1] == "cancel") {
if (args.length < 3) {
stderr.printf("Missing argument.\n");
return 1;
}
for (int i = 2; i < args.length; i++) {
uint32 id;
if (args[i].scanf("%u", out id) != 1) {
stderr.printf("Failed to parse argument.\n");
return 1;
}
ObjectPath p = manager.get_job(id);
Job j = bus.get_object (
"org.freedesktop.systemd1",
p,
"org.freedesktop.systemd1.Job") as Job;
j.cancel();
}
} else if (args[1] == "start" ||
args[1] == "stop" ||
args[1] == "reload" ||
args[1] == "restart") {
if (args.length < 3) {
stderr.printf("Missing argument.\n");
return 1;
}
if (block)
manager.subscribe();
for (int i = 2; i < args.length; i++) {
string mode = replace ? "replace" : "fail";
ObjectPath j = null;
if (args[1] == "start")
j = manager.start_unit(args[i], mode);
else if (args[1] == "stop")
j = manager.stop_unit(args[i], mode);
else if (args[1] == "restart")
j = manager.restart_unit(args[i], mode);
else if (args[1] == "reload")
j = manager.reload_unit(args[i], mode);
if (block)
jobs.append(j);
}
} else if (args[1] == "isolate") {
if (args.length != 3) {
stderr.printf("Missing argument.\n");
return 1;
}
ObjectPath j = manager.start_unit(args[2], "isolate");
if (block) {
manager.subscribe();
jobs.append(j);
}
} else if (args[1] == "monitor") {
manager.subscribe();
var unit_list = manager.list_units();
foreach (var i in unit_list) {
monitor_on_unit_new(i.id, i.unit_path);
if (i.job_id != 0)
monitor_on_job_new(i.job_id, i.job_path);
}
manager.unit_new += monitor_on_unit_new;
manager.unit_removed += monitor_on_unit_removed;
manager.job_new += monitor_on_job_new;
manager.job_removed += monitor_on_job_removed;
main_loop = new MainLoop();
main_loop.run();
} else if (args[1] == "dump")
stdout.puts(manager.dump());
else if (args[1] == "snapshot") {
ObjectPath p = manager.create_snapshot(args.length > 2 ? args[2] : "");
Unit u = bus.get_object(
"org.freedesktop.systemd1",
p,
"org.freedesktop.systemd1.Unit") as Unit;
stdout.printf("%s\n", u.id);
} else if (args[1] == "daemon-reload")
manager.reload();
else if (args[1] == "daemon-reexecute" || args[1] == "daemon-reexec")
manager.reexecute();
else if (args[1] == "daemon-exit")
manager.exit();
else if (args[1] == "show-environment") {
foreach(var x in manager.environment)
stderr.printf("%s\n", x);
} else if (args[1] == "set-environment")
manager.set_environment(args[2:args.length]);
else if (args[1] == "unset-environment")
manager.unset_environment(args[2:args.length]);
else {
stderr.printf("Unknown command %s.\n", args[1]);
return 1;
}
if (jobs != null && block) {
manager.job_removed += block_on_job_removed;
main_loop = new MainLoop();
main_loop.run();
}
} catch (DBus.Error e) {
stderr.printf("%s\n".printf(e.message));
return 1;
}
return exit_code;
}