#include <assert.h>
#include <errno.h>
#include <string.h>
-#include <sys/epoll.h>
#include <signal.h>
-#include <sys/signalfd.h>
#include <sys/wait.h>
#include <unistd.h>
#include <sys/poll.h>
static int manager_dispatch_jobs_in_progress(sd_event_source *source, usec_t usec, void *userdata);
static int manager_dispatch_run_queue(sd_event_source *source, void *userdata);
-static int manager_setup_notify(Manager *m) {
- union {
- struct sockaddr sa;
- struct sockaddr_un un;
- } sa = {
- .sa.sa_family = AF_UNIX,
- };
- int one = 1, r;
-
- m->notify_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
- if (m->notify_fd < 0) {
- log_error("Failed to allocate notification socket: %m");
- return -errno;
- }
-
- if (getpid() != 1 || detect_container(NULL) > 0)
- snprintf(sa.un.sun_path, sizeof(sa.un.sun_path), NOTIFY_SOCKET "/%llu", random_ull());
- else
- strncpy(sa.un.sun_path, NOTIFY_SOCKET, sizeof(sa.un.sun_path));
- sa.un.sun_path[0] = 0;
-
- r = bind(m->notify_fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1));
- if (r < 0) {
- log_error("bind() failed: %m");
- return -errno;
- }
-
- r = setsockopt(m->notify_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
- if (r < 0) {
- log_error("SO_PASSCRED failed: %m");
- return -errno;
- }
-
- r = sd_event_add_io(m->event, m->notify_fd, EPOLLIN, manager_dispatch_notify_fd, m, &m->notify_event_source);
- if (r < 0) {
- log_error("Failed to allocate notify event source: %s", strerror(-r));
- return -errno;
- }
-
- sa.un.sun_path[0] = '@';
- m->notify_socket = strdup(sa.un.sun_path);
- if (!m->notify_socket)
- return log_oom();
-
- log_debug("Using notification socket %s", m->notify_socket);
-
- return 0;
-}
-
static int manager_watch_jobs_in_progress(Manager *m) {
assert(m);
if (r < 0)
return r;
- /* Process signals a bit earlier than the rest of things */
+ /* Process signals a bit earlier than the rest of things, but
+ * later that notify_fd processing, so that the notify
+ * processing can still figure out to which process/service a
+ * message belongs, before we reap the process. */
r = sd_event_source_set_priority(m->signal_event_source, -5);
if (r < 0)
return r;
/* Import locale variables LC_*= from configuration */
locale_setup(&m->environment);
- } else
+ } else {
/* The user manager passes its own environment
* along to its children. */
m->environment = strv_copy(environ);
+ /* Let's remove some environment variables that we
+ * need ourselves to communicate with our clients */
+ strv_env_unset_many(
+ m->environment,
+ "NOTIFY_SOCKET",
+ "MAINPID",
+ "MANAGERPID",
+ "LISTEN_PID",
+ "LISTEN_FDS",
+ "WATCHDOG_PID",
+ "WATCHDOG_USEC",
+ NULL);
+ }
+
if (!m->environment)
return -ENOMEM;
return 0;
}
-static int manager_setup_kdbus(Manager *m) {
- _cleanup_free_ char *p = NULL;
-
- assert(m);
-
-#ifdef ENABLE_KDBUS
- if (m->kdbus_fd >= 0)
- return 0;
-
- /* If there's already a bus address set, don't set up kdbus */
- if (m->running_as == SYSTEMD_USER && getenv("DBUS_SESSION_BUS_ADDRESS"))
- return 0;
-
- m->kdbus_fd = bus_kernel_create_bus(m->running_as == SYSTEMD_SYSTEM ? "system" : "user", &p);
- if (m->kdbus_fd < 0) {
- log_debug("Failed to set up kdbus: %s", strerror(-m->kdbus_fd));
- return m->kdbus_fd;
- }
-
- log_debug("Successfully set up kdbus on %s", p);
-#endif
-
- return 0;
-}
-
-static int manager_connect_bus(Manager *m, bool reexecuting) {
- bool try_bus_connect;
-
- assert(m);
-
- try_bus_connect =
- m->kdbus_fd >= 0 ||
- reexecuting ||
- (m->running_as == SYSTEMD_USER && getenv("DBUS_SESSION_BUS_ADDRESS"));
-
- /* Try to connect to the busses, if possible. */
- return bus_init(m, try_bus_connect);
-}
-
int manager_new(SystemdRunningAs running_as, Manager **_m) {
Manager *m;
int r;
if (r < 0)
goto fail;
- r = manager_setup_notify(m);
- if (r < 0)
- goto fail;
-
r = manager_setup_time_change(m);
if (r < 0)
goto fail;
goto fail;
}
+ /* Note that we set up neither kdbus, nor the notify fd
+ * here. We do that after deserialization, since they might
+ * have gotten serialized across the reexec. */
+
m->taint_usr = dir_is_empty("/usr") > 0;
*_m = m;
return r;
}
+static int manager_setup_notify(Manager *m) {
+ union {
+ struct sockaddr sa;
+ struct sockaddr_un un;
+ } sa = {
+ .sa.sa_family = AF_UNIX,
+ };
+ int one = 1, r;
+
+ if (m->notify_fd < 0) {
+ _cleanup_close_ int fd = -1;
+
+ /* First free all secondary fields */
+ free(m->notify_socket);
+ m->notify_socket = NULL;
+ m->notify_event_source = sd_event_source_unref(m->notify_event_source);
+
+ fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
+ if (fd < 0) {
+ log_error("Failed to allocate notification socket: %m");
+ return -errno;
+ }
+
+ if (getpid() != 1 || detect_container(NULL) > 0)
+ snprintf(sa.un.sun_path, sizeof(sa.un.sun_path), NOTIFY_SOCKET "/%" PRIx64, random_u64());
+ else
+ strncpy(sa.un.sun_path, NOTIFY_SOCKET, sizeof(sa.un.sun_path));
+ sa.un.sun_path[0] = 0;
+
+ r = bind(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1));
+ if (r < 0) {
+ log_error("bind() failed: %m");
+ return -errno;
+ }
+
+ r = setsockopt(fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
+ if (r < 0) {
+ log_error("SO_PASSCRED failed: %m");
+ return -errno;
+ }
+
+ sa.un.sun_path[0] = '@';
+ m->notify_socket = strdup(sa.un.sun_path);
+ if (!m->notify_socket)
+ return log_oom();
+
+ m->notify_fd = fd;
+ fd = -1;
+
+ log_debug("Using notification socket %s", m->notify_socket);
+ }
+
+ if (!m->notify_event_source) {
+ r = sd_event_add_io(m->event, m->notify_fd, EPOLLIN, manager_dispatch_notify_fd, m, &m->notify_event_source);
+ if (r < 0) {
+ log_error("Failed to allocate notify event source: %s", strerror(-r));
+ return -errno;
+ }
+
+ /* Process signals a bit earlier than SIGCHLD, so that we can
+ * still identify to which service an exit message belongs */
+ r = sd_event_source_set_priority(m->notify_event_source, -7);
+ if (r < 0) {
+ log_error("Failed to set priority of notify event source: %s", strerror(-r));
+ return r;
+ }
+ }
+
+ return 0;
+}
+
+static int manager_setup_kdbus(Manager *m) {
+#ifdef ENABLE_KDBUS
+ _cleanup_free_ char *p = NULL;
+#endif
+
+#ifdef ENABLE_KDBUS
+ assert(m);
+
+ if (m->kdbus_fd >= 0)
+ return 0;
+
+ m->kdbus_fd = bus_kernel_create_bus(m->running_as == SYSTEMD_SYSTEM ? "system" : "user", m->running_as == SYSTEMD_SYSTEM, &p);
+ if (m->kdbus_fd < 0) {
+ log_debug("Failed to set up kdbus: %s", strerror(-m->kdbus_fd));
+ return m->kdbus_fd;
+ }
+
+ log_debug("Successfully set up kdbus on %s", p);
+
+ /* Create the namespace directory here, so that the contents
+ * of that directory is not visible to non-root users. This is
+ * necessary to ensure that users cannot get access to busses
+ * of virtualized users when no UID namespacing is used. */
+ if (m->running_as == SYSTEMD_SYSTEM)
+ mkdir_p_label("/dev/kdbus/ns", 0700);
+#endif
+
+ return 0;
+}
+
+static int manager_connect_bus(Manager *m, bool reexecuting) {
+ bool try_bus_connect;
+
+ assert(m);
+
+ try_bus_connect =
+ m->kdbus_fd >= 0 ||
+ reexecuting ||
+ (m->running_as == SYSTEMD_USER && getenv("DBUS_SESSION_BUS_ADDRESS"));
+
+ /* Try to connect to the busses, if possible. */
+ return bus_init(m, try_bus_connect);
+}
+
static unsigned manager_dispatch_cleanup_queue(Manager *m) {
Unit *u;
unsigned n = 0;
r = q;
}
+ /* We might have deserialized the notify fd, but if we didn't
+ * then let's create the bus now */
+ manager_setup_notify(m);
+
/* We might have deserialized the kdbus control fd, but if we
* didn't, then let's create the bus now. */
manager_setup_kdbus(m);
t = unit_name_to_type(name);
- if (t == _UNIT_TYPE_INVALID || !unit_name_is_valid(name, false))
+ if (t == _UNIT_TYPE_INVALID || !unit_name_is_valid(name, TEMPLATE_INVALID))
return sd_bus_error_setf(e, SD_BUS_ERROR_INVALID_ARGS, "Unit name %s is not valid.", name);
ret = manager_get_unit(m, name);
if (!u) {
u = manager_get_unit_by_pid(m, ucred->pid);
if (!u) {
- log_warning("Cannot find unit for notify message of PID %lu.", (unsigned long) ucred->pid);
+ log_warning("Cannot find unit for notify message of PID "PID_FMT".", ucred->pid);
continue;
}
}
for (;;) {
siginfo_t si = {};
Unit *u;
- int r;
/* First we call waitd() for a PID and do not reap the
* zombie. That way we can still access /proc/$PID for
_cleanup_free_ char *name = NULL;
get_process_comm(si.si_pid, &name);
- log_debug("Got SIGCHLD for process %lu (%s)", (unsigned long) si.si_pid, strna(name));
+ log_debug("Got SIGCHLD for process "PID_FMT" (%s)", si.si_pid, strna(name));
}
- /* Let's flush any message the dying child might still
- * have queued for us. This ensures that the process
- * still exists in /proc so that we can figure out
- * which cgroup and hence unit it belongs to. */
- r = manager_dispatch_notify_fd(m->notify_event_source, m->notify_fd, EPOLLIN, m);
- if (r < 0)
- return r;
-
/* And now figure out the unit this belongs to */
u = hashmap_get(m->watch_pids, LONG_TO_PTR(si.si_pid));
if (!u)
}
if (sfsi.ssi_pid > 0) {
- char *p = NULL;
+ _cleanup_free_ char *p = NULL;
get_process_comm(sfsi.ssi_pid, &p);
- log_debug("Received SIG%s from PID %lu (%s).",
- signal_to_string(sfsi.ssi_signo),
- (unsigned long) sfsi.ssi_pid, strna(p));
- free(p);
+ log_full(sfsi.ssi_signo == SIGCHLD ||
+ (sfsi.ssi_signo == SIGTERM && m->running_as == SYSTEMD_USER)
+ ? LOG_DEBUG : LOG_INFO,
+ "Received SIG%s from PID "PID_FMT" (%s).",
+ signal_to_string(sfsi.ssi_signo),
+ sfsi.ssi_pid, strna(p));
} else
- log_debug("Received SIG%s.", signal_to_string(sfsi.ssi_signo));
+ log_full(sfsi.ssi_signo == SIGCHLD ||
+ (sfsi.ssi_signo == SIGTERM && m->running_as == SYSTEMD_USER)
+ ? LOG_DEBUG : LOG_INFO,
+ "Received SIG%s.",
+ signal_to_string(sfsi.ssi_signo));
switch (sfsi.ssi_signo) {
}
if (sigchld)
- return manager_dispatch_sigchld(m);
+ manager_dispatch_sigchld(m);
return 0;
}
}
int manager_open_serialization(Manager *m, FILE **_f) {
- char *path = NULL;
+ _cleanup_free_ char *path = NULL;
int fd = -1;
FILE *f;
assert(_f);
if (m->running_as == SYSTEMD_SYSTEM)
- asprintf(&path, "/run/systemd/dump-%lu-XXXXXX", (unsigned long) getpid());
+ asprintf(&path, "/run/systemd/dump-"PID_FMT"-XXXXXX", getpid());
else
- asprintf(&path, "/tmp/systemd-dump-%lu-XXXXXX", (unsigned long) getpid());
+ asprintf(&path, "/tmp/systemd-dump-"PID_FMT"-XXXXXX", getpid());
if (!path)
return -ENOMEM;
fd = mkostemp(path, O_RDWR|O_CLOEXEC);
}
- if (fd < 0) {
- free(path);
+ if (fd < 0)
return -errno;
- }
unlink(path);
-
log_debug("Serializing state to %s", path);
- free(path);
f = fdopen(fd, "w+");
- if (!f)
+ if (!f) {
+ close_nointr_nofail(fd);
return -errno;
+ }
*_f = f;
}
}
+ if (m->notify_fd >= 0) {
+ int copy;
+
+ copy = fdset_put_dup(fds, m->notify_fd);
+ if (copy < 0)
+ return copy;
+
+ fprintf(f, "notify-fd=%i\n", copy);
+ fprintf(f, "notify-socket=%s\n", m->notify_socket);
+ }
+
if (m->kdbus_fd >= 0) {
int copy;
strv_free(m->environment);
m->environment = e;
+ } else if (startswith(l, "notify-fd=")) {
+ int fd;
+
+ if (safe_atoi(l + 10, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
+ log_debug("Failed to parse notify fd: %s", l + 10);
+ else {
+ if (m->notify_fd >= 0) {
+ m->notify_event_source = sd_event_source_unref(m->notify_event_source);
+ close_nointr_nofail(m->notify_fd);
+ }
+
+ m->notify_fd = fdset_remove(fds, fd);
+ }
+
+ } else if (startswith(l, "notify-socket=")) {
+ char *n;
+
+ n = strdup(l+14);
+ if (!n) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ free(m->notify_socket);
+ m->notify_socket = n;
+
} else if (startswith(l, "kdbus-fd=")) {
int fd;
fclose(f);
f = NULL;
+ /* Re-register notify_fd as event source */
+ q = manager_setup_notify(m);
+ if (q < 0)
+ r = q;
+
/* Third, fire things up! */
q = manager_coldplug(m);
if (q < 0)
if (!log_on_console())
log_struct(LOG_INFO,
MESSAGE_ID(SD_MESSAGE_STARTUP_FINISHED),
- "KERNEL_USEC=%llu", (unsigned long long) kernel_usec,
- "INITRD_USEC=%llu", (unsigned long long) initrd_usec,
- "USERSPACE_USEC=%llu", (unsigned long long) userspace_usec,
+ "KERNEL_USEC="USEC_FMT, kernel_usec,
+ "INITRD_USEC="USEC_FMT, initrd_usec,
+ "USERSPACE_USEC="USEC_FMT, userspace_usec,
"MESSAGE=Startup finished in %s (kernel) + %s (initrd) + %s (userspace) = %s.",
format_timespan(kernel, sizeof(kernel), kernel_usec, USEC_PER_MSEC),
format_timespan(initrd, sizeof(initrd), initrd_usec, USEC_PER_MSEC),
if (!log_on_console())
log_struct(LOG_INFO,
MESSAGE_ID(SD_MESSAGE_STARTUP_FINISHED),
- "KERNEL_USEC=%llu", (unsigned long long) kernel_usec,
- "USERSPACE_USEC=%llu", (unsigned long long) userspace_usec,
+ "KERNEL_USEC="USEC_FMT, kernel_usec,
+ "USERSPACE_USEC="USEC_FMT, userspace_usec,
"MESSAGE=Startup finished in %s (kernel) + %s (userspace) = %s.",
format_timespan(kernel, sizeof(kernel), kernel_usec, USEC_PER_MSEC),
format_timespan(userspace, sizeof(userspace), userspace_usec, USEC_PER_MSEC),
if (!log_on_console())
log_struct(LOG_INFO,
MESSAGE_ID(SD_MESSAGE_STARTUP_FINISHED),
- "USERSPACE_USEC=%llu", (unsigned long long) userspace_usec,
+ "USERSPACE_USEC="USEC_FMT, userspace_usec,
"MESSAGE=Startup finished in %s.",
format_timespan(sum, sizeof(sum), total_usec, USEC_PER_MSEC),
NULL);
return 0;
if (m->running_as == SYSTEMD_SYSTEM && getpid() == 1) {
+ /* systemd --system, not running --test */
p = strappend("/run/systemd/", name);
if (!p)
return log_oom();
+ r = mkdir_p_label(p, 0755);
+ if (r < 0) {
+ log_error("Failed to create generator directory %s: %s",
+ p, strerror(-r));
+ free(p);
+ return r;
+ }
+ } else if (m->running_as == SYSTEMD_USER) {
+ const char *s = NULL;
+
+ s = getenv("XDG_RUNTIME_DIR");
+ if (!s)
+ return -EINVAL;
+ p = strjoin(s, "/systemd/", name, NULL);
+ if (!p)
+ return log_oom();
+
r = mkdir_p_label(p, 0755);
if (r < 0) {
log_error("Failed to create generator directory %s: %s",
return r;
}
} else {
+ /* systemd --system --test */
+
p = strjoin("/tmp/systemd-", name, ".XXXXXX", NULL);
if (!p)
return log_oom();
~ianmdlvl / elogind.git / blobdiff