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systemctl: warn when operating on service files that changed on disk but haven't been reloaded

This commit is contained in:
Lennart Poettering 2010-07-17 00:57:51 +02:00
parent ceda54d93c
commit 45fb0699c4
7 changed files with 162 additions and 23 deletions
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16
fixme
View File

@ -37,22 +37,12 @@
* timeout waiting for mount devices?
* default logic for serial getty, ck logging, ssh readahead
* place /etc/inittab with explaining blurb.
* OnFailure=foo.unit
* default.target must be %ghosted...
* In command lines, support both "$FOO" and $FOO
* systemd-install disable should recursively kill all symlinks
* in %post create all symlinks manually and use inittab data
* check mtimes of dirs and unit files in systemctl
* /etc must always take precedence even if we follow symlinks!
* /lib/init/rw
@ -69,6 +59,12 @@
External:
* default.target must be %ghosted...
* in %post create all symlinks manually and use inittab data
* default logic for serial getty, ck logging, ssh readahead
* patch /etc/init.d/functions with:
if [ $PPID -ne 1 && mountpoint /cgroup/systemd ] ; then echo "You suck!" ; fi

17
src/dbus-unit.c
View File

@ -254,6 +254,23 @@ int bus_unit_append_cgroups(Manager *m, DBusMessageIter *i, const char *property
return 0;
}
int bus_unit_append_need_daemon_reload(Manager *m, DBusMessageIter *i, const char *property, void *data) {
Unit *u = data;
dbus_bool_t b;
assert(m);
assert(i);
assert(property);
assert(u);
b = unit_need_daemon_reload(u);
if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
return -ENOMEM;
return 0;
}
static DBusHandlerResult bus_unit_message_dispatch(Unit *u, DBusConnection *connection, DBusMessage *message) {
DBusMessage *reply = NULL;
Manager *m = u->meta.manager;

5
src/dbus-unit.h
View File

@ -88,6 +88,7 @@
" <property name=\"DefaultDependencies\" type=\"b\" access=\"read\"/>\n" \
" <property name=\"DefaultControlGroup\" type=\"s\" access=\"read\"/>\n" \
" <property name=\"ControlGroups\" type=\"as\" access=\"read\"/>\n" \
" <property name=\"NeedDaemonReload\" type=\"b\" access=\"read\"/>\n" \
" </interface>\n"
#define BUS_UNIT_PROPERTIES \
@ -121,7 +122,8 @@
{ "org.freedesktop.systemd1.Unit", "OnlyByDependency", bus_property_append_bool, "b", &u->meta.only_by_dependency }, \
{ "org.freedesktop.systemd1.Unit", "DefaultDependencies", bus_property_append_bool, "b", &u->meta.default_dependencies }, \
{ "org.freedesktop.systemd1.Unit", "DefaultControlGroup", bus_unit_append_default_cgroup, "s", u }, \
{ "org.freedesktop.systemd1.Unit", "ControlGroups", bus_unit_append_cgroups, "as", u }
{ "org.freedesktop.systemd1.Unit", "ControlGroups", bus_unit_append_cgroups, "as", u }, \
{ "org.freedesktop.systemd1.Unit", "NeedDaemonReload", bus_unit_append_need_daemon_reload, "b", u }
int bus_unit_append_names(Manager *m, DBusMessageIter *i, const char *property, void *data);
int bus_unit_append_dependencies(Manager *m, DBusMessageIter *i, const char *property, void *data);
@ -134,6 +136,7 @@ int bus_unit_append_can_reload(Manager *m, DBusMessageIter *i, const char *prope
int bus_unit_append_job(Manager *m, DBusMessageIter *i, const char *property, void *data);
int bus_unit_append_default_cgroup(Manager *m, DBusMessageIter *i, const char *property, void *data);
int bus_unit_append_cgroups(Manager *m, DBusMessageIter *i, const char *property, void *data);
int bus_unit_append_need_daemon_reload(Manager *m, DBusMessageIter *i, const char *property, void *data);
void bus_unit_send_change_signal(Unit *u);
void bus_unit_send_removed_signal(Unit *u);

16
src/load-fragment.c
View File

@ -29,6 +29,7 @@
#include <sys/prctl.h>
#include <sys/mount.h>
#include <linux/fs.h>
#include <sys/stat.h>
#include "unit.h"
#include "strv.h"
@ -1558,6 +1559,7 @@ static int load_from_path(Unit *u, const char *path) {
{ "Conflicts", config_parse_deps, UINT_TO_PTR(UNIT_CONFLICTS), "Unit" },
{ "Before", config_parse_deps, UINT_TO_PTR(UNIT_BEFORE), "Unit" },
{ "After", config_parse_deps, UINT_TO_PTR(UNIT_AFTER), "Unit" },
{ "OnFailure", config_parse_deps, UINT_TO_PTR(UNIT_ON_FAILURE), "Unit" },
{ "RecursiveStop", config_parse_bool, &u->meta.recursive_stop, "Unit" },
{ "StopWhenUnneeded", config_parse_bool, &u->meta.stop_when_unneeded, "Unit" },
{ "OnlyByDependency", config_parse_bool, &u->meta.only_by_dependency, "Unit" },
@ -1653,6 +1655,7 @@ static int load_from_path(Unit *u, const char *path) {
FILE *f = NULL;
char *filename = NULL, *id = NULL;
Unit *merged;
struct stat st;
if (!u) {
/* Dirty dirty hack. */
@ -1740,6 +1743,17 @@ static int load_from_path(Unit *u, const char *path) {
goto finish;
}
zero(st);
if (fstat(fileno(f), &st) < 0) {
r = -errno;
goto finish;
}
if (!S_ISREG(st.st_mode)) {
r = -ENOENT;
goto finish;
}
/* Now, parse the file contents */
if ((r = config_parse(filename, f, sections, items, false, u)) < 0)
goto finish;
@ -1748,6 +1762,8 @@ static int load_from_path(Unit *u, const char *path) {
u->meta.fragment_path = filename;
filename = NULL;
u->meta.fragment_mtime = timespec_load(&st.st_mtim);
u->meta.load_state = UNIT_LOADED;
r = 0;

103
src/systemctl.c
View File

@ -742,6 +742,77 @@ finish:
return r;
}
static bool unit_need_daemon_reload(DBusConnection *bus, const char *unit) {
DBusMessage *m, *reply;
dbus_bool_t b = FALSE;
DBusMessageIter iter, sub;
const char
*interface = "org.freedesktop.systemd1.Unit",
*property = "NeedDaemonReload",
*path;
/* We ignore all errors here, since this is used to show a warning only */
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"GetUnit")))
goto finish;
if (!dbus_message_append_args(m,
DBUS_TYPE_STRING, &unit,
DBUS_TYPE_INVALID))
goto finish;
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, NULL)))
goto finish;
if (!dbus_message_get_args(reply, NULL,
DBUS_TYPE_OBJECT_PATH, &path,
DBUS_TYPE_INVALID))
goto finish;
dbus_message_unref(m);
if (!(m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
path,
"org.freedesktop.DBus.Properties",
"Get")))
goto finish;
if (!dbus_message_append_args(m,
DBUS_TYPE_STRING, &interface,
DBUS_TYPE_STRING, &property,
DBUS_TYPE_INVALID)) {
goto finish;
}
dbus_message_unref(reply);
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, NULL)))
goto finish;
if (!dbus_message_iter_init(reply, &iter) ||
dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)
goto finish;
dbus_message_iter_recurse(&iter, &sub);
if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_BOOLEAN)
goto finish;
dbus_message_iter_get_basic(&sub, &b);
finish:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
return b;
}
typedef struct WaitData {
Set *set;
bool failed;
@ -860,6 +931,7 @@ static int start_unit_one(
DBusMessage *m = NULL, *reply = NULL;
DBusError error;
const char *path;
int r;
assert(bus);
@ -903,17 +975,20 @@ static int start_unit_one(
goto finish;
}
if (!arg_no_block) {
const char *path;
char *p;
if (!dbus_message_get_args(reply, &error,
DBUS_TYPE_OBJECT_PATH, &path,
DBUS_TYPE_INVALID)) {
log_error("Failed to parse reply: %s", error.message);
r = -EIO;
goto finish;
}
if (!dbus_message_get_args(reply, &error,
DBUS_TYPE_OBJECT_PATH, &path,
DBUS_TYPE_INVALID)) {
log_error("Failed to parse reply: %s", error.message);
r = -EIO;
goto finish;
}
if (unit_need_daemon_reload(bus, name))
log_warning("Unit file of created job changed on disk, 'systemctl %s daemon-reload' recommended.",
arg_session ? "--session" : "--system");
if (!arg_no_block) {
char *p;
if (!(p = strdup(path))) {
log_error("Failed to duplicate path.");
@ -1287,6 +1362,8 @@ typedef struct UnitStatusInfo {
const char *fragment_path;
const char *default_control_group;
bool need_daemon_reload;
/* Service */
pid_t main_pid;
pid_t control_pid;
@ -1449,6 +1526,10 @@ static void print_status_info(UnitStatusInfo *i) {
show_cgroup_by_path(i->default_control_group, "\t\t ", c);
}
if (i->need_daemon_reload)
printf("\n" ANSI_HIGHLIGHT_ON "Warning:" ANSI_HIGHLIGHT_OFF " Unit file changed on disk, 'systemctl %s daemon-reload' recommended.\n",
arg_session ? "--session" : "--system");
}
static int status_property(const char *name, DBusMessageIter *iter, UnitStatusInfo *i) {
@ -1495,6 +1576,8 @@ static int status_property(const char *name, DBusMessageIter *iter, UnitStatusIn
if (streq(name, "Accept"))
i->accept = b;
else if (streq(name, "NeedDaemonReload"))
i->need_daemon_reload = b;
break;
}

25
src/unit.c
View File

@ -27,6 +27,7 @@
#include <sys/poll.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/stat.h>
#include "set.h"
#include "unit.h"
@ -606,7 +607,8 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
"%s\tActive Enter Timestamp: %s\n"
"%s\tActive Exit Timestamp: %s\n"
"%s\tInactive Enter Timestamp: %s\n"
"%s\tGC Check Good: %s\n",
"%s\tGC Check Good: %s\n"
"%s\tNeed Daemon Reload: %s\n",
prefix, u->meta.id,
prefix, unit_description(u),
prefix, strna(u->meta.instance),
@ -616,7 +618,8 @@ void unit_dump(Unit *u, FILE *f, const char *prefix) {
prefix, strna(format_timestamp(timestamp2, sizeof(timestamp2), u->meta.active_enter_timestamp.realtime)),
prefix, strna(format_timestamp(timestamp3, sizeof(timestamp3), u->meta.active_exit_timestamp.realtime)),
prefix, strna(format_timestamp(timestamp4, sizeof(timestamp4), u->meta.inactive_enter_timestamp.realtime)),
prefix, yes_no(unit_check_gc(u)));
prefix, yes_no(unit_check_gc(u)),
prefix, yes_no(unit_need_daemon_reload(u)));
SET_FOREACH(t, u->meta.names, i)
fprintf(f, "%s\tName: %s\n", prefix, t);
@ -2029,6 +2032,24 @@ void unit_status_printf(Unit *u, const char *format, ...) {
va_end(ap);
}
bool unit_need_daemon_reload(Unit *u) {
struct stat st;
assert(u);
if (!u->meta.fragment_path)
return false;
zero(st);
if (stat(u->meta.fragment_path, &st) < 0)
/* What, cannot access this anymore? */
return true;
return
u->meta.fragment_mtime &&
timespec_load(&st.st_mtim) != u->meta.fragment_mtime;
}
static const char* const unit_type_table[_UNIT_TYPE_MAX] = {
[UNIT_SERVICE] = "service",
[UNIT_TIMER] = "timer",

3
src/unit.h
View File

@ -141,6 +141,7 @@ struct Meta {
char *description;
char *fragment_path; /* if loaded from a config file this is the primary path to it */
usec_t fragment_mtime;
/* If there is something to do with this unit, then this is
* the job for it */
@ -458,6 +459,8 @@ int unit_coldplug(Unit *u);
void unit_status_printf(Unit *u, const char *format, ...);
bool unit_need_daemon_reload(Unit *u);
const char *unit_type_to_string(UnitType i);
UnitType unit_type_from_string(const char *s);