Copyright 2011 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU General Public License
+ You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
-#include <assert.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <linux/vt.h>
#include <string.h>
+#include "sd-messages.h"
#include "logind-seat.h"
#include "logind-acl.h"
#include "util.h"
#include "mkdir.h"
+#include "formats-util.h"
+#include "terminal-util.h"
Seat *seat_new(Manager *m, const char *id) {
Seat *s;
return NULL;
}
- s->id = file_name_from_path(s->state_file);
+ s->id = basename(s->state_file);
s->manager = m;
if (hashmap_put(m->seats, s->id, s) < 0) {
assert(s);
if (s->in_gc_queue)
- LIST_REMOVE(Seat, gc_queue, s->manager->seat_gc_queue, s);
+ LIST_REMOVE(gc_queue, s->manager->seat_gc_queue, s);
while (s->sessions)
session_free(s->sessions);
hashmap_remove(s->manager->seats, s->id);
+ free(s->positions);
free(s->state_file);
free(s);
}
int seat_save(Seat *s) {
+ _cleanup_free_ char *temp_path = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
int r;
- FILE *f;
- char *temp_path;
assert(s);
if (!s->started)
return 0;
- r = safe_mkdir("/run/systemd/seats", 0755, 0, 0);
+ r = mkdir_safe_label("/run/systemd/seats", 0755, 0, 0);
if (r < 0)
goto finish;
fprintf(f,
"# This is private data. Do not parse.\n"
- "IS_VTCONSOLE=%i\n"
- "CAN_MULTI_SESSION=%i\n",
- seat_is_vtconsole(s),
- seat_can_multi_session(s));
+ "IS_SEAT0=%i\n"
+ "CAN_MULTI_SESSION=%i\n"
+ "CAN_TTY=%i\n"
+ "CAN_GRAPHICAL=%i\n",
+ seat_is_seat0(s),
+ seat_can_multi_session(s),
+ seat_can_tty(s),
+ seat_can_graphical(s));
if (s->active) {
assert(s->active->user);
fprintf(f,
"ACTIVE=%s\n"
- "ACTIVE_UID=%lu\n",
+ "ACTIVE_UID="UID_FMT"\n",
s->active->id,
- (unsigned long) s->active->user->uid);
+ s->active->user->uid);
}
if (s->sessions) {
fputs("UIDS=", f);
LIST_FOREACH(sessions_by_seat, i, s->sessions)
fprintf(f,
- "%lu%c",
- (unsigned long) i->user->uid,
+ UID_FMT"%c",
+ i->user->uid,
i->sessions_by_seat_next ? ' ' : '\n');
}
unlink(temp_path);
}
- fclose(f);
- free(temp_path);
-
finish:
if (r < 0)
- log_error("Failed to save seat data for %s: %s", s->id, strerror(-r));
+ log_error_errno(r, "Failed to save seat data %s: %m", s->state_file);
return r;
}
return 0;
}
-static int vt_allocate(int vtnr) {
- int fd, r;
- char *p;
+static int vt_allocate(unsigned int vtnr) {
+ char p[sizeof("/dev/tty") + DECIMAL_STR_MAX(unsigned int)];
+ _cleanup_close_ int fd = -1;
assert(vtnr >= 1);
- if (asprintf(&p, "/dev/tty%i", vtnr) < 0)
- return -ENOMEM;
-
+ snprintf(p, sizeof(p), "/dev/tty%u", vtnr);
fd = open_terminal(p, O_RDWR|O_NOCTTY|O_CLOEXEC);
- free(p);
-
- r = fd < 0 ? -errno : 0;
-
- if (fd >= 0)
- close_nointr_nofail(fd);
-
- return r;
-}
-
-int seat_preallocate_vts(Seat *s) {
- int r = 0;
- unsigned i;
-
- assert(s);
- assert(s->manager);
-
- log_debug("Preallocating VTs...");
-
- if (s->manager->n_autovts <= 0)
- return 0;
+ if (fd < 0)
+ return -errno;
- if (!seat_can_multi_session(s))
- return 0;
-
- for (i = 1; i <= s->manager->n_autovts; i++) {
- int q;
-
- q = vt_allocate(i);
- if (q < 0) {
- log_error("Failed to preallocate VT %i: %s", i, strerror(-q));
- r = q;
- }
- }
-
- return r;
+ return 0;
}
int seat_apply_acls(Seat *s, Session *old_active) {
!!s->active, s->active ? s->active->user->uid : 0);
if (r < 0)
- log_error("Failed to apply ACLs: %s", strerror(-r));
+ log_error_errno(r, "Failed to apply ACLs: %m");
return r;
}
old_active = s->active;
s->active = session;
+ if (old_active) {
+ session_device_pause_all(old_active);
+ session_send_changed(old_active, "Active", NULL);
+ }
+
seat_apply_acls(s, old_active);
- if (session && session->started)
- session_send_changed(session, "Active\0");
+ if (session && session->started) {
+ session_send_changed(session, "Active", NULL);
+ session_device_resume_all(session);
+ }
if (!session || session->started)
- seat_send_changed(s, "ActiveSession\0");
+ seat_send_changed(s, "ActiveSession", NULL);
seat_save(s);
if (old_active) {
session_save(old_active);
- user_save(old_active->user);
+ if (!session || session->user != old_active->user)
+ user_save(old_active->user);
}
return 0;
}
-int seat_active_vt_changed(Seat *s, int vtnr) {
+int seat_switch_to(Seat *s, unsigned int num) {
+ /* Public session positions skip 0 (there is only F1-F12). Maybe it
+ * will get reassigned in the future, so return error for now. */
+ if (num == 0)
+ return -EINVAL;
+
+ if (num >= s->position_count || !s->positions[num]) {
+ /* allow switching to unused VTs to trigger auto-activate */
+ if (seat_has_vts(s) && num < 64)
+ return chvt(num);
+
+ return -EINVAL;
+ }
+
+ return session_activate(s->positions[num]);
+}
+
+int seat_switch_to_next(Seat *s) {
+ unsigned int start, i;
+
+ if (s->position_count == 0)
+ return -EINVAL;
+
+ start = 1;
+ if (s->active && s->active->pos > 0)
+ start = s->active->pos;
+
+ for (i = start + 1; i < s->position_count; ++i)
+ if (s->positions[i])
+ return session_activate(s->positions[i]);
+
+ for (i = 1; i < start; ++i)
+ if (s->positions[i])
+ return session_activate(s->positions[i]);
+
+ return -EINVAL;
+}
+
+int seat_switch_to_previous(Seat *s) {
+ unsigned int start, i;
+
+ if (s->position_count == 0)
+ return -EINVAL;
+
+ start = 1;
+ if (s->active && s->active->pos > 0)
+ start = s->active->pos;
+
+ for (i = start - 1; i > 0; --i)
+ if (s->positions[i])
+ return session_activate(s->positions[i]);
+
+ for (i = s->position_count - 1; i > start; --i)
+ if (s->positions[i])
+ return session_activate(s->positions[i]);
+
+ return -EINVAL;
+}
+
+int seat_active_vt_changed(Seat *s, unsigned int vtnr) {
Session *i, *new_active = NULL;
int r;
assert(s);
assert(vtnr >= 1);
- if (!seat_can_multi_session(s))
+ if (!seat_has_vts(s))
return -EINVAL;
- log_debug("VT changed to %i", vtnr);
+ log_debug("VT changed to %u", vtnr);
+ /* we might have earlier closing sessions on the same VT, so try to
+ * find a running one first */
LIST_FOREACH(sessions_by_seat, i, s->sessions)
- if (i->vtnr == vtnr) {
+ if (i->vtnr == vtnr && !i->stopping) {
new_active = i;
break;
}
+ if (!new_active) {
+ /* no running one? then we can't decide which one is the
+ * active one, let the first one win */
+ LIST_FOREACH(sessions_by_seat, i, s->sessions)
+ if (i->vtnr == vtnr) {
+ new_active = i;
+ break;
+ }
+ }
+
r = seat_set_active(s, new_active);
- manager_spawn_autovt(s->manager, vtnr);
return r;
}
int seat_read_active_vt(Seat *s) {
char t[64];
ssize_t k;
- int r, vtnr;
+ unsigned int vtnr;
+ int r;
assert(s);
- if (!seat_can_multi_session(s))
+ if (!seat_has_vts(s))
return 0;
lseek(s->manager->console_active_fd, SEEK_SET, 0);
return -EIO;
}
- r = safe_atoi(t+3, &vtnr);
+ r = safe_atou(t+3, &vtnr);
if (r < 0) {
log_error("Failed to parse VT number %s", t+3);
return r;
}
- if (vtnr <= 0) {
+ if (!vtnr) {
log_error("VT number invalid: %s", t+3);
return -EIO;
}
if (s->started)
return 0;
- log_info("New seat %s.", s->id);
-
- /* Initialize VT magic stuff */
- seat_preallocate_vts(s);
+ log_struct(LOG_INFO,
+ LOG_MESSAGE_ID(SD_MESSAGE_SEAT_START),
+ "SEAT_ID=%s", s->id,
+ LOG_MESSAGE("New seat %s.", s->id),
+ NULL);
/* Read current VT */
seat_read_active_vt(s);
return 0;
}
-int seat_stop(Seat *s) {
+int seat_stop(Seat *s, bool force) {
int r = 0;
assert(s);
if (s->started)
- log_info("Removed seat %s.", s->id);
+ log_struct(LOG_INFO,
+ LOG_MESSAGE_ID(SD_MESSAGE_SEAT_STOP),
+ "SEAT_ID=%s", s->id,
+ LOG_MESSAGE("Removed seat %s.", s->id),
+ NULL);
- seat_stop_sessions(s);
+ seat_stop_sessions(s, force);
unlink(s->state_file);
seat_add_to_gc_queue(s);
return r;
}
-int seat_stop_sessions(Seat *s) {
+int seat_stop_sessions(Seat *s, bool force) {
Session *session;
int r = 0, k;
assert(s);
LIST_FOREACH(sessions_by_seat, session, s->sessions) {
- k = session_stop(session);
+ k = session_stop(session, force);
if (k < 0)
r = k;
}
return r;
}
+void seat_evict_position(Seat *s, Session *session) {
+ Session *iter;
+ unsigned int pos = session->pos;
+
+ session->pos = 0;
+
+ if (pos == 0)
+ return;
+
+ if (pos < s->position_count && s->positions[pos] == session) {
+ s->positions[pos] = NULL;
+
+ /* There might be another session claiming the same
+ * position (eg., during gdm->session transition), so let's look
+ * for it and set it on the free slot. */
+ LIST_FOREACH(sessions_by_seat, iter, s->sessions) {
+ if (iter->pos == pos) {
+ s->positions[pos] = iter;
+ break;
+ }
+ }
+ }
+}
+
+void seat_claim_position(Seat *s, Session *session, unsigned int pos) {
+ /* with VTs, the position is always the same as the VTnr */
+ if (seat_has_vts(s))
+ pos = session->vtnr;
+
+ if (!GREEDY_REALLOC0(s->positions, s->position_count, pos + 1))
+ return;
+
+ seat_evict_position(s, session);
+
+ session->pos = pos;
+ if (pos > 0 && !s->positions[pos])
+ s->positions[pos] = session;
+}
+
+static void seat_assign_position(Seat *s, Session *session) {
+ unsigned int pos;
+
+ if (session->pos > 0)
+ return;
+
+ for (pos = 1; pos < s->position_count; ++pos)
+ if (!s->positions[pos])
+ break;
+
+ seat_claim_position(s, session, pos);
+}
+
int seat_attach_session(Seat *s, Session *session) {
assert(s);
assert(session);
assert(!session->seat);
- session->seat = s;
- LIST_PREPEND(Session, sessions_by_seat, s->sessions, session);
+ if (!seat_has_vts(s) != !session->vtnr)
+ return -EINVAL;
- seat_send_changed(s, "Sessions\0");
+ session->seat = s;
+ LIST_PREPEND(sessions_by_seat, s->sessions, session);
+ seat_assign_position(s, session);
- /* Note that even if a seat is not multi-session capable it
- * still might have multiple sessions on it since old, dead
- * sessions might continue to be tracked until all their
- * processes are gone. The most recently added session
- * (i.e. the first in s->sessions) is the one that matters. */
+ seat_send_changed(s, "Sessions", NULL);
- if (!seat_can_multi_session(s))
+ /* On seats with VTs, the VT logic defines which session is active. On
+ * seats without VTs, we automatically activate new sessions. */
+ if (!seat_has_vts(s))
seat_set_active(s, session);
return 0;
}
-bool seat_is_vtconsole(Seat *s) {
+void seat_complete_switch(Seat *s) {
+ Session *session;
+
+ assert(s);
+
+ /* if no session-switch is pending or if it got canceled, do nothing */
+ if (!s->pending_switch)
+ return;
+
+ session = s->pending_switch;
+ s->pending_switch = NULL;
+
+ seat_set_active(s, session);
+}
+
+bool seat_has_vts(Seat *s) {
+ assert(s);
+
+ return seat_is_seat0(s) && s->manager->console_active_fd >= 0;
+}
+
+bool seat_is_seat0(Seat *s) {
assert(s);
- return s->manager->vtconsole == s;
+ return s->manager->seat0 == s;
}
bool seat_can_multi_session(Seat *s) {
assert(s);
- if (!seat_is_vtconsole(s))
- return false;
+ return seat_has_vts(s);
+}
+
+bool seat_can_tty(Seat *s) {
+ assert(s);
- /* If we can't watch which VT is in the foreground, we don't
- * support VT switching */
+ return seat_has_vts(s);
+}
+
+bool seat_has_master_device(Seat *s) {
+ assert(s);
- return s->manager->console_active_fd >= 0;
+ /* device list is ordered by "master" flag */
+ return !!s->devices && s->devices->master;
+}
+
+bool seat_can_graphical(Seat *s) {
+ assert(s);
+
+ return seat_has_master_device(s);
}
int seat_get_idle_hint(Seat *s, dual_timestamp *t) {
Session *session;
bool idle_hint = true;
- dual_timestamp ts = { 0, 0 };
+ dual_timestamp ts = DUAL_TIMESTAMP_NULL;
assert(s);
if (!ih) {
if (!idle_hint) {
- if (k.monotonic < ts.monotonic)
+ if (k.monotonic > ts.monotonic)
ts = k;
} else {
idle_hint = false;
return idle_hint;
}
-int seat_check_gc(Seat *s, bool drop_not_started) {
+bool seat_check_gc(Seat *s, bool drop_not_started) {
assert(s);
if (drop_not_started && !s->started)
- return 0;
+ return false;
- if (seat_is_vtconsole(s))
- return 1;
+ if (seat_is_seat0(s))
+ return true;
- return !!s->devices;
+ return seat_has_master_device(s);
}
void seat_add_to_gc_queue(Seat *s) {
if (s->in_gc_queue)
return;
- LIST_PREPEND(Seat, gc_queue, s->manager->seat_gc_queue, s);
+ LIST_PREPEND(gc_queue, s->manager->seat_gc_queue, s);
s->in_gc_queue = true;
}
~ianmdlvl / elogind.git / blobdiff