#include <errno.h>
#include <fcntl.h>
-#include <linux/vt.h>
#include <linux/kd.h>
+#include <linux/vt.h>
#include <signal.h>
#include <string.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include "sd-messages.h"
-#include "util.h"
-#include "mkdir.h"
-#include "path-util.h"
-#include "fileio.h"
-#include "audit.h"
-#include "bus-util.h"
+
+#include "alloc-util.h"
+#include "audit-util.h"
#include "bus-error.h"
-#include "logind-session.h"
+#include "bus-util.h"
+#include "escape.h"
+#include "fd-util.h"
+#include "fileio.h"
#include "formats-util.h"
+#include "io-util.h"
+#include "logind-session.h"
+#include "mkdir.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "string-table.h"
#include "terminal-util.h"
+#include "user-util.h"
+#include "util.h"
-#define RELEASE_USEC (20*USEC_PER_SEC)
+// #define RELEASE_USEC (20*USEC_PER_SEC)
static void session_remove_fifo(Session *s);
free(s->scope);
}
-/// elogind does not support systemd scope_jobs
-#if 0
+#if 0 /// elogind does not support systemd scope_jobs
free(s->scope_job);
#endif // 0
if (s->scope)
fprintf(f, "SCOPE=%s\n", s->scope);
-/// elogind does not support systemd scope_jobs
-#if 0
+#if 0 /// elogind does not support systemd scope_jobs
if (s->scope_job)
fprintf(f, "SCOPE_JOB=%s\n", s->scope_job);
#endif // 0
r = parse_env_file(s->state_file, NEWLINE,
"REMOTE", &remote,
"SCOPE", &s->scope,
-/// elogind does not support systemd scope_jobs
-#if 0
+#if 0 /// elogind does not support systemd scope_jobs
"SCOPE_JOB", &s->scope_job,
#endif // 0
"FIFO", &s->fifo_path,
return 0;
}
+#if 0 /// UNNEEDED by elogind
static int session_start_scope(Session *s) {
- int r = 0;
+ int r;
assert(s);
assert(s->user);
- assert(s->user->slice);
if (!s->scope) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
- _cleanup_free_ char *description = NULL;
- char *scope = NULL; //, *job = NULL;
-
- description = strjoin("Session ", s->id, " of user ", s->user->name, NULL);
- if (!description)
- return log_oom();
+ char *scope, *job = NULL;
+ const char *description;
scope = strjoin("session-", s->id, ".scope", NULL);
if (!scope)
return log_oom();
-/// elogind : Do not try to use dbus to call systemd
-#if 0
- r = manager_start_scope(s->manager, scope, s->leader, s->user->slice, description, "logind.service", "systemd-user-sessions.service", &error, &job);
-#endif // 0
+ description = strjoina("Session ", s->id, " of user ", s->user->name, NULL);
+
+ r = manager_start_scope(
+ s->manager,
+ scope,
+ s->leader,
+ s->user->slice,
+ description,
+ "systemd-logind.service",
+ "systemd-user-sessions.service",
+ (uint64_t) -1, /* disable TasksMax= for the scope, rely on the slice setting for it */
+ &error,
+ &job);
if (r < 0) {
- log_error("Failed to start session scope %s: %s %s",
- scope, bus_error_message(&error, r), error.name);
+ log_error_errno(r, "Failed to start session scope %s: %s", scope, bus_error_message(&error, r));
free(scope);
return r;
} else {
s->scope = scope;
-/// elogind does not support scope jobs
-#if 0
+
free(s->scope_job);
s->scope_job = job;
-#endif // 0
}
}
if (s->scope)
- hashmap_put(s->manager->session_units, s->scope, s);
+ (void) hashmap_put(s->manager->session_units, s->scope, s);
return 0;
}
+#endif // 0
+
+static int session_start_cgroup(Session *s) {
+ int r;
+
+ assert(s);
+ assert(s->user);
+ assert(s->leader > 0);
+
+ /* First, create our own group */
+ r = cg_create(SYSTEMD_CGROUP_CONTROLLER, s->id);
+ if (r < 0)
+ return log_error_errno(r, "Failed to create cgroup %s: %m", s->id);
+
+ r = cg_attach(SYSTEMD_CGROUP_CONTROLLER, s->id, s->leader);
+ if (r < 0)
+ log_warning_errno(r, "Failed to attach PID %d to cgroup %s: %m", s->leader, s->id);
+
+ return 0;
+}
+
int session_start(Session *s) {
int r;
return r;
/* Create cgroup */
+/// elogind does its own session management without systemd units,
+/// slices and scopes
+#if 0
r = session_start_scope(s);
+#else
+ r = session_start_cgroup(s);
+#endif // 0
if (r < 0)
return r;
return 0;
}
-/// UNNEEDED by elogind
-#if 0
+#if 0 /// UNNEEDED by elogind
static int session_stop_scope(Session *s, bool force) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
char *job = NULL;
}
#endif // 0
+static int session_stop_cgroup(Session *s, bool force) {
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+ int r;
+
+ assert(s);
+
+ if (force || manager_shall_kill(s->manager, s->user->name)) {
+ r = session_kill(s, KILL_ALL, SIGTERM);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
int session_stop(Session *s, bool force) {
- int r = 0;
+ int r;
assert(s);
session_remove_fifo(s);
/* Kill cgroup */
-/// @todo : Currently elogind does not start scopes. It remains to be seen
-/// whether this is really not needed, but then, elogind is not a
-/// systemd cgroups manager.
-#if 0
+#if 0 /// elogind does not start scopes, but sessions
r = session_stop_scope(s, force);
+#else
+ r = session_stop_cgroup(s, force);
#endif // 0
s->stopping = true;
return 0;
}
+#if 0 /// UNNEEDED by elogind
static int release_timeout_callback(sd_event_source *es, uint64_t usec, void *userdata) {
Session *s = userdata;
session_stop(s, false);
return 0;
}
+#endif // 0
int session_release(Session *s) {
assert(s);
if (s->timer_event_source)
return 0;
+ /* In systemd, session release is triggered by user jobs
+ dying. In elogind we don't have that so go ahead and stop
+ now. */
+#if 0
return sd_event_add_time(s->manager->event,
&s->timer_event_source,
CLOCK_MONOTONIC,
now(CLOCK_MONOTONIC) + RELEASE_USEC, 0,
release_timeout_callback, s);
+
+#else
+ return session_stop(s, false);
+#endif // 0
}
bool session_is_active(Session *s) {
if (s->fifo_path) {
unlink(s->fifo_path);
- free(s->fifo_path);
- s->fifo_path = NULL;
+ s->fifo_path = mfree(s->fifo_path);
}
}
return true;
}
-/// elogind supports neither scopes nor jobs
-#if 0
+#if 0 /// elogind supports neither scopes nor jobs
if (s->scope_job && manager_job_is_active(s->manager, s->scope_job))
return true;
return true;
#endif // 0
+ if ( s->user->manager
+ && (cg_is_empty_recursive (SYSTEMD_CGROUP_CONTROLLER, s->user->manager->cgroup_root) > 0) )
+ return true;
+
return false;
}
if (s->stopping || s->timer_event_source)
return SESSION_CLOSING;
-/// elogind does not support systemd scope_jobs
-#if 0
+#if 0 /// elogind does not support systemd scope_jobs
if (s->scope_job || s->fifo_fd < 0)
#else
if (s->fifo_fd < 0)
int session_kill(Session *s, KillWho who, int signo) {
assert(s);
-/// FIXME: Without direct cgroup support, elogind can not kill sessions
-#if 0
+#if 0 /// Without direct cgroup support, elogind can not kill sessions
if (!s->scope)
return -ESRCH;
return manager_kill_unit(s->manager, s->scope, who, signo, NULL);
#else
- return -ESRCH;
+ if (who == KILL_LEADER) {
+ if (s->leader <= 0)
+ return -ESRCH;
+
+ /* FIXME: verify that leader is in cgroup? */
+
+ if (kill(s->leader, signo) < 0) {
+ return log_error_errno(errno, "Failed to kill process leader %d for session %s: %m", s->leader, s->id);
+ }
+ return 0;
+ } else {
+ bool sigcont = false;
+ bool ignore_self = true;
+ bool rem = true;
+ return cg_kill_recursive (SYSTEMD_CGROUP_CONTROLLER, s->id, signo,
+ sigcont, ignore_self, rem, NULL);
+ }
#endif // 0
}
sprintf(path, "/dev/tty%u", s->vtnr);
s->vtfd = open_terminal(path, O_RDWR | O_CLOEXEC | O_NONBLOCK | O_NOCTTY);
if (s->vtfd < 0)
- return log_error_errno(errno, "cannot open VT %s of session %s: %m", path, s->id);
+ return log_error_errno(s->vtfd, "cannot open VT %s of session %s: %m", path, s->id);
return s->vtfd;
}
r = fchown(vt, s->user->uid, -1);
if (r < 0) {
- r = -errno;
- log_error_errno(errno, "Cannot change owner of /dev/tty%u: %m", s->vtnr);
+ r = log_error_errno(errno,
+ "Cannot change owner of /dev/tty%u: %m",
+ s->vtnr);
goto error;
}
r = ioctl(vt, KDSKBMODE, K_OFF);
if (r < 0) {
- r = -errno;
- log_error_errno(errno, "Cannot set K_OFF on /dev/tty%u: %m", s->vtnr);
+ r = log_error_errno(errno,
+ "Cannot set K_OFF on /dev/tty%u: %m",
+ s->vtnr);
goto error;
}
r = ioctl(vt, KDSETMODE, KD_GRAPHICS);
if (r < 0) {
- r = -errno;
- log_error_errno(errno, "Cannot set KD_GRAPHICS on /dev/tty%u: %m", s->vtnr);
+ r = log_error_errno(errno,
+ "Cannot set KD_GRAPHICS on /dev/tty%u: %m",
+ s->vtnr);
goto error;
}
mode.acqsig = SIGRTMIN + 1;
r = ioctl(vt, VT_SETMODE, &mode);
if (r < 0) {
- r = -errno;
- log_error_errno(errno, "Cannot set VT_PROCESS on /dev/tty%u: %m", s->vtnr);
+ r = log_error_errno(errno,
+ "Cannot set VT_PROCESS on /dev/tty%u: %m",
+ s->vtnr);
goto error;
}
}
void session_restore_vt(Session *s) {
+
+ static const struct vt_mode mode = {
+ .mode = VT_AUTO,
+ };
+
_cleanup_free_ char *utf8 = NULL;
- int vt, kb = K_XLATE;
- struct vt_mode mode = { 0 };
+ int vt, kb, old_fd;
/* We need to get a fresh handle to the virtual terminal,
* since the old file-descriptor is potentially in a hung-up
* little dance to avoid having the terminal be available
* for reuse before we've cleaned it up.
*/
- int old_fd = s->vtfd;
+ old_fd = s->vtfd;
s->vtfd = -1;
vt = session_open_vt(s);
if (read_one_line_file("/sys/module/vt/parameters/default_utf8", &utf8) >= 0 && *utf8 == '1')
kb = K_UNICODE;
+ else
+ kb = K_XLATE;
(void) ioctl(vt, KDSKBMODE, kb);
- mode.mode = VT_AUTO;
(void) ioctl(vt, VT_SETMODE, &mode);
-
- fchown(vt, 0, -1);
+ (void) fchown(vt, 0, (gid_t) -1);
s->vtfd = safe_close(s->vtfd);
}
~ianmdlvl / elogind.git / blobdiff