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execute: make sending of SIGKILL on shutdown optional

This commit is contained in:
Lennart Poettering 2011-01-18 22:55:54 +01:00
parent 0058d7b91c
commit ba035df230
13 changed files with 134 additions and 28 deletions
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4
TODO
View File

@ -4,8 +4,6 @@
* Fix multiple reload statements
* make usage of SIGKILL when shutting down services optional
* figure out what happened to bluez patch
* in pam_systemd: add option to kill normal user sessions on logout but only those with uid != 0
@ -23,8 +21,6 @@
* finish syslog socket stuff
* when starting systemd --user we get "Failed to set udev event buffer size."
* configurable jitter for timer events
* dbus should run with oom adjust set

10
man/systemd.mount.xml
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@ -240,6 +240,16 @@
</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>SendSIGKILL=</varname></term>
<listitem><para>Specifies whether to
send SIGKILL to remaining processes
after a timeout, if the normal
shutdown procedure left processes of
the mount around. Takes a boolean
value. Defaults to "yes".
</para></listitem>
</varlistentry>
</variablelist>
</refsect1>

20
man/systemd.service.xml
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@ -560,14 +560,17 @@
<option>control-group</option>.</para>
<para>Processes will first be
terminated via SIGTERM (unless this is
changed via
terminated via SIGTERM (unless the
signal to send is changed via
<varname>KillSignal=</varname>). If
then after a delay (configured via the
<varname>TimeoutSec=</varname> option)
processes still remain, the
termination request is repeated with
the SIGKILL signal. See
the SIGKILL signal (unless this is
disabled via the
<varname>SendSIGKILL=</varname>
option). See
<citerefentry><refentrytitle>kill</refentrytitle><manvolnum>2</manvolnum></citerefentry>
for more
information.</para></listitem>
@ -581,6 +584,17 @@
</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>SendSIGKILL=</varname></term>
<listitem><para>Specifies whether to
send SIGKILL to remaining processes
after a timeout, if the normal
shutdown procedure left processes of
the service around. Takes a boolean
value. Defaults to "yes".
</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>NonBlocking=</varname></term>
<listitem><para>Set O_NONBLOCK flag

11
man/systemd.socket.xml
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@ -527,6 +527,17 @@
</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>SendSIGKILL=</varname></term>
<listitem><para>Specifies whether to
send SIGKILL to remaining processes
after a timeout, if the normal
shutdown procedure left processes of
the socket around. Takes a boolean
value. Defaults to "yes".
</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>Service=</varname></term>
<listitem><para>Specifies the service

11
man/systemd.swap.xml
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@ -176,6 +176,17 @@
swap. Defaults to SIGTERM.
</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>SendSIGKILL=</varname></term>
<listitem><para>Specifies whether to
send SIGKILL to remaining processes
after a timeout, if the normal
shutdown procedure left processes of
the swap around. Takes a boolean
value. Defaults to "yes".
</para></listitem>
</varlistentry>
</variablelist>
</refsect1>

7
src/execute.c
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@ -1349,6 +1349,7 @@ void exec_context_init(ExecContext *c) {
c->syslog_level_prefix = true;
c->mount_flags = MS_SHARED;
c->kill_signal = SIGTERM;
c->send_sigkill = true;
}
void exec_context_done(ExecContext *c) {
@ -1618,9 +1619,11 @@ void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) {
fprintf(f,
"%sKillMode: %s\n"
"%sKillSignal: SIG%s\n",
"%sKillSignal: SIG%s\n"
"%sSendSIGKILL: %s\n",
prefix, kill_mode_to_string(c->kill_mode),
prefix, signal_to_string(c->kill_signal));
prefix, signal_to_string(c->kill_signal),
prefix, yes_no(c->send_sigkill));
if (c->utmp_id)
fprintf(f,

1
src/execute.h
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@ -145,6 +145,7 @@ struct ExecContext {
/* Not relevant for spawning processes, just for killing */
KillMode kill_mode;
int kill_signal;
bool send_sigkill;
cap_t capabilities;
int secure_bits;

1
src/load-fragment.c
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@ -1820,6 +1820,7 @@ static int load_from_path(Unit *u, const char *path) {
{ "PAMName", config_parse_string_printf, &(context).pam_name, section }, \
{ "KillMode", config_parse_kill_mode, &(context).kill_mode, section }, \
{ "KillSignal", config_parse_kill_signal, &(context).kill_signal, section }, \
{ "SendSIGKILL", config_parse_bool, &(context).send_sigkill, section }, \
{ "UtmpIdentifier", config_parse_string_printf, &(context).utmp_id, section }
const ConfigItem items[] = {

39
src/mount.c
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@ -1156,18 +1156,45 @@ static void mount_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
break;
case MOUNT_MOUNTING_SIGTERM:
log_warning("%s mounting timed out. Killing.", u->meta.id);
mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
if (m->exec_context.send_sigkill) {
log_warning("%s mounting timed out. Killing.", u->meta.id);
mount_enter_signal(m, MOUNT_MOUNTING_SIGKILL, false);
} else {
log_warning("%s mounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
if (m->from_proc_self_mountinfo)
mount_enter_mounted(m, false);
else
mount_enter_dead(m, false);
}
break;
case MOUNT_REMOUNTING_SIGTERM:
log_warning("%s remounting timed out. Killing.", u->meta.id);
mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
if (m->exec_context.send_sigkill) {
log_warning("%s remounting timed out. Killing.", u->meta.id);
mount_enter_signal(m, MOUNT_REMOUNTING_SIGKILL, false);
} else {
log_warning("%s remounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
if (m->from_proc_self_mountinfo)
mount_enter_mounted(m, false);
else
mount_enter_dead(m, false);
}
break;
case MOUNT_UNMOUNTING_SIGTERM:
log_warning("%s unmounting timed out. Killing.", u->meta.id);
mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
if (m->exec_context.send_sigkill) {
log_warning("%s unmounting timed out. Killing.", u->meta.id);
mount_enter_signal(m, MOUNT_UNMOUNTING_SIGKILL, false);
} else {
log_warning("%s unmounting timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
if (m->from_proc_self_mountinfo)
mount_enter_mounted(m, false);
else
mount_enter_dead(m, false);
}
break;
case MOUNT_MOUNTING_SIGKILL:

20
src/service.c
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@ -2712,8 +2712,14 @@ static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
break;
case SERVICE_STOP_SIGTERM:
log_warning("%s stopping timed out. Killing.", u->meta.id);
service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
if (s->exec_context.send_sigkill) {
log_warning("%s stopping timed out. Killing.", u->meta.id);
service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
} else {
log_warning("%s stopping timed out. Skipping SIGKILL.", u->meta.id);
service_enter_stop_post(s, false);
}
break;
case SERVICE_STOP_SIGKILL:
@ -2731,8 +2737,14 @@ static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
break;
case SERVICE_FINAL_SIGTERM:
log_warning("%s stopping timed out (2). Killing.", u->meta.id);
service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
if (s->exec_context.send_sigkill) {
log_warning("%s stopping timed out (2). Killing.", u->meta.id);
service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
} else {
log_warning("%s stopping timed out (2). Skipping SIGKILL. Entering failed mode.", u->meta.id);
service_enter_dead(s, false, true);
}
break;
case SERVICE_FINAL_SIGKILL:

2
src/service.h
View File

@ -33,7 +33,7 @@ typedef enum ServiceState {
SERVICE_START,
SERVICE_START_POST,
SERVICE_RUNNING,
SERVICE_EXITED, /* Nothing is running anymore, but RemainAfterExit is true, ehnce this is OK */
SERVICE_EXITED, /* Nothing is running anymore, but RemainAfterExit is true hence this is OK */
SERVICE_RELOAD,
SERVICE_STOP, /* No STOP_PRE state, instead just register multiple STOP executables */
SERVICE_STOP_SIGTERM,

18
src/socket.c
View File

@ -1688,8 +1688,13 @@ static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
break;
case SOCKET_STOP_PRE_SIGTERM:
log_warning("%s stopping timed out. Killing.", u->meta.id);
socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
if (s->exec_context.send_sigkill) {
log_warning("%s stopping timed out. Killing.", u->meta.id);
socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
} else {
log_warning("%s stopping timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
socket_enter_stop_post(s, false);
}
break;
case SOCKET_STOP_PRE_SIGKILL:
@ -1703,8 +1708,13 @@ static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
break;
case SOCKET_FINAL_SIGTERM:
log_warning("%s stopping timed out (2). Killing.", u->meta.id);
socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
if (s->exec_context.send_sigkill) {
log_warning("%s stopping timed out (2). Killing.", u->meta.id);
socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
} else {
log_warning("%s stopping timed out (2). Skipping SIGKILL. Ignoring.", u->meta.id);
socket_enter_dead(s, false);
}
break;
case SOCKET_FINAL_SIGKILL:

18
src/swap.c
View File

@ -995,13 +995,23 @@ static void swap_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
break;
case SWAP_ACTIVATING_SIGTERM:
log_warning("%s activation timed out. Killing.", u->meta.id);
swap_enter_signal(s, SWAP_ACTIVATING_SIGKILL, false);
if (s->exec_context.send_sigkill) {
log_warning("%s activation timed out. Killing.", u->meta.id);
swap_enter_signal(s, SWAP_ACTIVATING_SIGKILL, false);
} else {
log_warning("%s activation timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
swap_enter_dead(s, false);
}
break;
case SWAP_DEACTIVATING_SIGTERM:
log_warning("%s deactivation timed out. Killing.", u->meta.id);
swap_enter_signal(s, SWAP_DEACTIVATING_SIGKILL, false);
if (s->exec_context.send_sigkill) {
log_warning("%s deactivation timed out. Killing.", u->meta.id);
swap_enter_signal(s, SWAP_DEACTIVATING_SIGKILL, false);
} else {
log_warning("%s deactivation timed out. Skipping SIGKILL. Ignoring.", u->meta.id);
swap_enter_dead(s, false);
}
break;
case SWAP_ACTIVATING_SIGKILL: