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install: various improvements 

Rename --start to --realize, to make things less confusing when doing
"systemctl stop --realize foo.service".

Introduce --realize=reload.

Don't talk to systemd when run within a chroot, or when systemd isn't
running.
This commit is contained in:
Lennart Poettering 2010-07-08 21:34:51 +02:00
parent bc8c2f5c54
commit b4f10a5e89
7 changed files with 89 additions and 45 deletions
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3
Makefile.am
View File

@ -503,7 +503,8 @@ systemd_notify_LDADD = \
systemd_install_SOURCES = \
src/install.c \
src/path-lookup.c \
src/dbus-common.c
src/dbus-common.c \
src/sd-daemon.c
systemd_install_LDADD = \
libsystemd-basic.la \

4
man/daemon.xml
View File

@ -793,11 +793,11 @@ endif</programlisting>
package managers:</para>
<programlisting>%post
/usr/bin/systemd-install --start enable foobar.service foobar.socket >/dev/null 2>&amp;1 || :
/usr/bin/systemd-install --realize enable foobar.service foobar.socket >/dev/null 2>&amp;1 || :
%preun
if [ "$1" -eq 0 ]; then
/usr/bin/systemd-install --start disable foobar.service foobar.socket >/dev/null 2>&amp;1 || :
/usr/bin/systemd-install --realize disable foobar.service foobar.socket >/dev/null 2>&amp;1 || :
fi</programlisting>
</refsect2>

32
man/systemd-install.xml
View File

@ -130,13 +130,14 @@
</varlistentry>
<varlistentry>
<term><option>--start[=MODE]</option></term>
<term><option>--realize[=MODE]</option></term>
<listitem><para>After
enabling/disabling stop/restart the
unit and reload manager
enabling/disabling stop/restart/stop
the unit and reload manager
configuration. Optionally, takes one
of <option>no</option>,
<option>reload</option>,
<option>minimal</option>,
<option>maybe</option> or
<option>yes</option>. If
@ -145,13 +146,17 @@
configuration and no service will be
started or stopped after
enabling/disabling of the unit
files. If <option>minimal</option> is
passed and a unit is being enabled it
will also be restarted should it
already be running. If a unit is being
disabled it will be stopped should it
be running. In either case the
daemon configuration is
files. If <option>reload</option> is
passed the daemon configuration is
reloaded but the unit otherwise not
started/stopped/restarted. If
<option>minimal</option> is passed and
a unit is being enabled it will also
be restarted should it already be
running. If a unit is being disabled
it will be stopped should it be
running. In either case the daemon
configuration is
reloaded. <option>maybe</option> is
similar to this, but the unit will
also be started if it is being enabled
@ -168,8 +173,11 @@
<option>maybe</option>. This option
has no effect when
<option>--global</option> or
<command>test</command> is
used.</para></listitem>
<command>test</command> is used, or
when systemd is not running or the
command is executed in a
<citerefentry><refentrytitle>chroot</refentrytitle><manvolnum>2</manvolnum></citerefentry>
environment.</para></listitem>
</varlistentry>
</variablelist>

72
src/install.c
View File

@ -32,6 +32,7 @@
#include "strv.h"
#include "conf-parser.h"
#include "dbus-common.h"
#include "sd-daemon.h"
static bool arg_force = false;
@ -49,11 +50,12 @@ static enum {
} arg_action = ACTION_INVALID;
static enum {
START_NO, /* Don't start/stop or anything */
START_MINIMAL, /* Only shutdown/restart if running. */
START_MAYBE, /* Start if WantedBy= suggests */
START_YES /* Start unconditionally */
} arg_start = START_NO;
REALIZE_NO, /* Don't reload/start/stop or anything */
REALIZE_RELOAD, /* Only reload daemon config, don't stop/start */
REALIZE_MINIMAL, /* Only shutdown/restart if running. */
REALIZE_MAYBE, /* Start if WantedBy= suggests */
REALIZE_YES /* Start unconditionally */
} arg_realize = REALIZE_NO;
typedef struct {
char *name;
@ -69,13 +71,13 @@ static int help(void) {
printf("%s [OPTIONS...] {COMMAND} ...\n\n"
"Install init system units.\n\n"
" -h --help Show this help\n"
" --force Override existing links\n"
" --system Install into system\n"
" --session Install into session\n"
" --global Install into all sessions\n"
" --start[=MODE] Start/stop/restart unit after installation\n"
" Takes 'no', 'minimal', 'maybe' or 'yes'\n\n"
" -h --help Show this help\n"
" --force Override existing links\n"
" --system Install into system\n"
" --session Install into session\n"
" --global Install into all sessions\n"
" --realize[=MODE] Start/stop/restart unit after installation\n"
" Takes 'no', 'minimal', 'maybe' or 'yes'\n\n"
"Commands:\n"
" enable [NAME...] Enable one or more units\n"
" disable [NAME...] Disable one or more units\n"
@ -92,7 +94,7 @@ static int parse_argv(int argc, char *argv[]) {
ARG_SYSTEM,
ARG_GLOBAL,
ARG_FORCE,
ARG_START
ARG_REALIZE
};
static const struct option options[] = {
@ -101,7 +103,7 @@ static int parse_argv(int argc, char *argv[]) {
{ "system", no_argument, NULL, ARG_SYSTEM },
{ "global", no_argument, NULL, ARG_GLOBAL },
{ "force", no_argument, NULL, ARG_FORCE },
{ "start", optional_argument, NULL, ARG_START },
{ "realize", optional_argument, NULL, ARG_REALIZE },
{ NULL, 0, NULL, 0 }
};
@ -134,20 +136,20 @@ static int parse_argv(int argc, char *argv[]) {
arg_force = true;
break;
case ARG_START:
case ARG_REALIZE:
if (!optarg)
arg_start = START_MAYBE;
arg_realize = REALIZE_MAYBE;
else if (streq(optarg, "no"))
arg_start = START_NO;
arg_realize = REALIZE_NO;
else if (streq(optarg, "minimal"))
arg_start = START_MINIMAL;
arg_realize = REALIZE_MINIMAL;
else if (streq(optarg, "maybe"))
arg_start = START_MAYBE;
arg_realize = REALIZE_MAYBE;
else if (streq(optarg, "yes"))
arg_start = START_YES;
arg_realize = REALIZE_YES;
else {
log_error("Invalid --start argument %s", optarg);
log_error("Invalid --realize argument %s", optarg);
return -EINVAL;
}
@ -306,7 +308,7 @@ static int install_info_run(DBusConnection *bus, InstallInfo *i) {
if (arg_action == ACTION_ENABLE) {
if (arg_start == START_MAYBE) {
if (arg_realize == REALIZE_MAYBE) {
char **k;
bool yes_please = false;
@ -416,7 +418,7 @@ static int install_info_run(DBusConnection *bus, InstallInfo *i) {
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
arg_start == START_MINIMAL ? "TryRestartUnit" : "RestartUnit"))) {
arg_realize == REALIZE_MINIMAL ? "TryRestartUnit" : "RestartUnit"))) {
log_error("Could not allocate message.");
r = -ENOMEM;
goto finish;
@ -778,16 +780,26 @@ static int do_run(void) {
dbus_error_init(&error);
if (arg_start == START_NO)
if (arg_realize == REALIZE_NO)
return 0;
if (arg_where == WHERE_GLOBAL) {
log_warning("Warning: --start has no effect with --global.");
log_warning("Warning: --realize has no effect with --global.");
return 0;
}
if (arg_action != ACTION_ENABLE && arg_action != ACTION_DISABLE) {
log_warning("Warning: --start has no effect with test.");
log_warning("Warning: --realize has no effect with test.");
return 0;
}
if (arg_where == WHERE_SYSTEM && sd_booted() <= 0) {
log_info("systemd is not running, --realize has not effect.");
return 0;
}
if (arg_where == WHERE_SYSTEM && running_in_chroot() > 0) {
log_info("Running in a chroot() environment, --realize has no effect.");
return 0;
}
@ -802,9 +814,11 @@ static int do_run(void) {
if ((r = daemon_reload(bus)) < 0)
goto finish;
HASHMAP_FOREACH(j, have_installed, i)
if ((q = install_info_run(bus, j)) < 0)
r = q;
if (arg_realize != REALIZE_RELOAD) {
HASHMAP_FOREACH(j, have_installed, i)
if ((q = install_info_run(bus, j)) < 0)
r = q;
}
if (arg_action == ACTION_DISABLE)
if ((q = daemon_reload(bus)) < 0)

2
src/socket.c
View File

@ -1039,7 +1039,7 @@ static void socket_enter_running(Socket *s, int cfd) {
socket_set_state(s, SOCKET_RUNNING);
} else {
Unit *u;
char *prefix, *instance, *name;
char *prefix, *instance = NULL, *name;
if (s->n_connections >= s->max_connections) {
log_warning("Too many incoming connections (%u)", s->n_connections);

19
src/util.c
View File

@ -2825,6 +2825,25 @@ int columns(void) {
return parsed_columns;
}
int running_in_chroot(void) {
struct stat a, b;
zero(a);
zero(b);
/* Only works as root */
if (stat("/proc/1/root", &a) < 0)
return -errno;
if (stat("/", &b) < 0)
return -errno;
return
a.st_dev != b.st_dev ||
a.st_ino != b.st_ino;
}
static const char *const ioprio_class_table[] = {
[IOPRIO_CLASS_NONE] = "none",
[IOPRIO_CLASS_RT] = "realtime",

2
src/util.h
View File

@ -330,6 +330,8 @@ void status_welcome(void);
int columns(void);
int running_in_chroot(void);
const char *ioprio_class_to_string(int i);
int ioprio_class_from_string(const char *s);