From f2b6878955b1f77ea1fa87b502b13d5dbefc57f6 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Tue, 24 Apr 2012 14:28:00 +0200 Subject: [PATCH] service: introduce Type=idle and use it for gettys Type=idle is much like Type=simple, however between the fork() and the exec() in the child we wait until PID 1 informs us that no jobs are left. This is mostly a cosmetic fix to make gettys appear only after all boot output is finished and complete. Note that this does not impact the normal job logic as we do not delay the completion of any jobs. We just delay the invocation of the actual binary, and only for services that otherwise would be of Type=simple. --- src/core/execute.c | 11 +++++++++++ src/core/execute.h | 1 + src/core/manager.c | 10 ++++++++-- src/core/manager.h | 3 +++ src/core/mount.c | 1 + src/core/service.c | 6 ++++-- src/core/service.h | 1 + src/core/socket.c | 1 + src/core/swap.c | 1 + src/core/transaction.c | 14 ++++++++++++++ units/console-getty.service.m4.in | 1 + units/console-shell.service.m4.in | 1 + units/emergency.service.in | 1 + units/getty@.service.m4 | 1 + units/rescue.service.m4.in | 1 + units/serial-getty@.service.m4 | 1 + 16 files changed, 51 insertions(+), 4 deletions(-) diff --git a/src/core/execute.c b/src/core/execute.c index c59f7e2d..99a7881f 100644 --- a/src/core/execute.c +++ b/src/core/execute.c @@ -37,6 +37,7 @@ #include #include #include +#include #ifdef HAVE_PAM #include @@ -963,6 +964,7 @@ int exec_spawn(ExecCommand *command, CGroupBonding *cgroup_bondings, CGroupAttribute *cgroup_attributes, const char *cgroup_suffix, + int idle_pipe[2], pid_t *ret) { pid_t pid; @@ -1050,6 +1052,15 @@ int exec_spawn(ExecCommand *command, goto fail_child; } + if (idle_pipe) { + if (idle_pipe[1] >= 0) + close_nointr_nofail(idle_pipe[1]); + if (idle_pipe[0] >= 0) { + fd_wait_for_event(idle_pipe[0], POLLHUP, DEFAULT_TIMEOUT_USEC); + close_nointr_nofail(idle_pipe[0]); + } + } + /* Close sockets very early to make sure we don't * block init reexecution because it cannot bind its * sockets */ diff --git a/src/core/execute.h b/src/core/execute.h index 428bb7c9..03c63d46 100644 --- a/src/core/execute.h +++ b/src/core/execute.h @@ -193,6 +193,7 @@ int exec_spawn(ExecCommand *command, struct CGroupBonding *cgroup_bondings, struct CGroupAttribute *cgroup_attributes, const char *cgroup_suffix, + int pipe_fd[2], pid_t *ret); void exec_command_done(ExecCommand *c); diff --git a/src/core/manager.c b/src/core/manager.c index f7ccba62..a6013668 100644 --- a/src/core/manager.c +++ b/src/core/manager.c @@ -259,6 +259,7 @@ int manager_new(ManagerRunningAs running_as, Manager **_m) { m->name_data_slot = m->conn_data_slot = m->subscribed_data_slot = -1; m->exit_code = _MANAGER_EXIT_CODE_INVALID; m->pin_cgroupfs_fd = -1; + m->idle_pipe[0] = m->idle_pipe[1] = -1; #ifdef HAVE_AUDIT m->audit_fd = -1; @@ -518,6 +519,8 @@ void manager_free(Manager *m) { hashmap_free(m->cgroup_bondings); set_free_free(m->unit_path_cache); + close_pipe(m->idle_pipe); + free(m); } @@ -1962,10 +1965,13 @@ void manager_check_finished(Manager *m) { assert(m); - if (dual_timestamp_is_set(&m->finish_timestamp)) + if (hashmap_size(m->jobs) > 0) return; - if (hashmap_size(m->jobs) > 0) + /* Notify Type=idle units that we are done now */ + close_pipe(m->idle_pipe); + + if (dual_timestamp_is_set(&m->finish_timestamp)) return; dual_timestamp_get(&m->finish_timestamp); diff --git a/src/core/manager.h b/src/core/manager.h index 808a0d42..154c1fae 100644 --- a/src/core/manager.h +++ b/src/core/manager.h @@ -227,6 +227,9 @@ struct Manager { unsigned n_installed_jobs; unsigned n_failed_jobs; + + /* Type=idle pipes */ + int idle_pipe[2]; }; int manager_new(ManagerRunningAs running_as, Manager **m); diff --git a/src/core/mount.c b/src/core/mount.c index e662af0c..3357b7df 100644 --- a/src/core/mount.c +++ b/src/core/mount.c @@ -801,6 +801,7 @@ static int mount_spawn(Mount *m, ExecCommand *c, pid_t *_pid) { UNIT(m)->cgroup_bondings, UNIT(m)->cgroup_attributes, NULL, + NULL, &pid)) < 0) goto fail; diff --git a/src/core/service.c b/src/core/service.c index 59dd7129..4358a948 100644 --- a/src/core/service.c +++ b/src/core/service.c @@ -1769,6 +1769,7 @@ static int service_spawn( UNIT(s)->cgroup_bondings, UNIT(s)->cgroup_attributes, is_control ? "control" : NULL, + s->type == SERVICE_IDLE ? UNIT(s)->manager->idle_pipe : NULL, &pid); if (r < 0) @@ -2130,7 +2131,7 @@ static void service_enter_start(Service *s) { if (r < 0) goto fail; - if (s->type == SERVICE_SIMPLE) { + if (s->type == SERVICE_SIMPLE || s->type == SERVICE_IDLE) { /* For simple services we immediately start * the START_POST binaries. */ @@ -3714,7 +3715,8 @@ static const char* const service_type_table[_SERVICE_TYPE_MAX] = { [SERVICE_FORKING] = "forking", [SERVICE_ONESHOT] = "oneshot", [SERVICE_DBUS] = "dbus", - [SERVICE_NOTIFY] = "notify" + [SERVICE_NOTIFY] = "notify", + [SERVICE_IDLE] = "idle" }; DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType); diff --git a/src/core/service.h b/src/core/service.h index eb413149..819672f6 100644 --- a/src/core/service.h +++ b/src/core/service.h @@ -65,6 +65,7 @@ typedef enum ServiceType { SERVICE_ONESHOT, /* we fork and wait until the program finishes (i.e. programs like fsck which run and need to finish before we continue) */ SERVICE_DBUS, /* we fork and wait until a specific D-Bus name appears on the bus */ SERVICE_NOTIFY, /* we fork and wait until a daemon sends us a ready message with sd_notify() */ + SERVICE_IDLE, /* much like simple, but delay exec() until all jobs are dispatched. */ _SERVICE_TYPE_MAX, _SERVICE_TYPE_INVALID = -1 } ServiceType; diff --git a/src/core/socket.c b/src/core/socket.c index 31aff5bc..1d56829b 100644 --- a/src/core/socket.c +++ b/src/core/socket.c @@ -1152,6 +1152,7 @@ static int socket_spawn(Socket *s, ExecCommand *c, pid_t *_pid) { UNIT(s)->cgroup_bondings, UNIT(s)->cgroup_attributes, NULL, + NULL, &pid); strv_free(argv); diff --git a/src/core/swap.c b/src/core/swap.c index 9c30c11b..fea3f688 100644 --- a/src/core/swap.c +++ b/src/core/swap.c @@ -620,6 +620,7 @@ static int swap_spawn(Swap *s, ExecCommand *c, pid_t *_pid) { UNIT(s)->cgroup_bondings, UNIT(s)->cgroup_attributes, NULL, + NULL, &pid)) < 0) goto fail; diff --git a/src/core/transaction.c b/src/core/transaction.c index aee155f5..09ed8073 100644 --- a/src/core/transaction.c +++ b/src/core/transaction.c @@ -19,6 +19,9 @@ along with systemd; If not, see . ***/ +#include +#include + #include "transaction.h" #include "bus-errors.h" @@ -693,6 +696,17 @@ int transaction_activate(Transaction *tr, Manager *m, JobMode mode, DBusError *e assert(hashmap_isempty(tr->jobs)); + if (!hashmap_isempty(m->jobs)) { + /* Are there any jobs now? Then make sure we have the + * idle pipe around. We don't really care too much + * whether this works or not, as the idle pipe is a + * feature for cosmetics, not actually useful for + * anything beyond that. */ + + if (m->idle_pipe[0] < 0 && m->idle_pipe[1] < 0) + pipe2(m->idle_pipe, O_NONBLOCK|O_CLOEXEC); + } + return 0; } diff --git a/units/console-getty.service.m4.in b/units/console-getty.service.m4.in index 9473d61d..298082b3 100644 --- a/units/console-getty.service.m4.in +++ b/units/console-getty.service.m4.in @@ -30,6 +30,7 @@ Before=getty.target [Service] ExecStart=-/sbin/agetty --noclear -s console 115200,38400,9600 +Type=idle Restart=always RestartSec=0 UtmpIdentifier=cons diff --git a/units/console-shell.service.m4.in b/units/console-shell.service.m4.in index 7d0da9b8..4f795e16 100644 --- a/units/console-shell.service.m4.in +++ b/units/console-shell.service.m4.in @@ -33,6 +33,7 @@ Environment=HOME=/root WorkingDirectory=/root ExecStart=-/sbin/sulogin ExecStopPost=-@SYSTEMCTL@ poweroff +Type=idle StandardInput=tty-force StandardOutput=inherit StandardError=inherit diff --git a/units/emergency.service.in b/units/emergency.service.in index c1421ba2..75007563 100644 --- a/units/emergency.service.in +++ b/units/emergency.service.in @@ -20,6 +20,7 @@ ExecStartPre=-/bin/plymouth quit ExecStartPre=-/bin/echo 'Welcome to emergency mode. Use "systemctl default" or ^D to enter default mode.' ExecStart=-/sbin/sulogin ExecStopPost=@SYSTEMCTL@ --fail --no-block default +Type=idle StandardInput=tty-force StandardOutput=inherit StandardError=inherit diff --git a/units/getty@.service.m4 b/units/getty@.service.m4 index 17c76f5b..431a3dd7 100644 --- a/units/getty@.service.m4 +++ b/units/getty@.service.m4 @@ -41,6 +41,7 @@ ConditionPathExists=/dev/tty0 [Service] Environment=TERM=linux ExecStart=-/sbin/agetty %I 38400 +Type=idle Restart=always RestartSec=0 UtmpIdentifier=%I diff --git a/units/rescue.service.m4.in b/units/rescue.service.m4.in index c736f834..3adfcf45 100644 --- a/units/rescue.service.m4.in +++ b/units/rescue.service.m4.in @@ -33,6 +33,7 @@ m4_ifdef(`TARGET_MEEGO', ExecStart=-/bin/bash -c "exec ${SINGLE}"', `ExecStart=-/sbin/sulogin')))) ExecStopPost=-@SYSTEMCTL@ --fail --no-block default +Type=idle StandardInput=tty-force StandardOutput=inherit StandardError=inherit diff --git a/units/serial-getty@.service.m4 b/units/serial-getty@.service.m4 index 93bc643e..366b2d07 100644 --- a/units/serial-getty@.service.m4 +++ b/units/serial-getty@.service.m4 @@ -37,6 +37,7 @@ IgnoreOnIsolate=yes [Service] Environment=TERM=vt102 ExecStart=-/sbin/agetty -s %I 115200,38400,9600 +Type=idle Restart=always RestartSec=0 UtmpIdentifier=%I -- 2.39.5