logind: never select closing sessions for a VT

[elogind.git] / src / login / logind-seat.c

diff --git a/src/login/logind-seat.c b/src/login/logind-seat.c
index 8eb5e3ee0a58d72d4f261fb3798a424c8144621c..5c15ff3a893db509719ee93800c8bce7e632ecc9 100644 (file)
--- a/src/login/logind-seat.c
+++ b/src/login/logind-seat.c
@@ -19,21 +19,18 @@
   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-id128.h"
 #include "sd-messages.h"
 #include "logind-seat.h"
 #include "logind-acl.h"
 #include "util.h"
 #include "mkdir.h"
-#include "path-util.h"
+#include "formats-util.h"
+#include "terminal-util.h"
 
 Seat *seat_new(Manager *m, const char *id) {
         Seat *s;
@@ -181,34 +178,6 @@ static int vt_allocate(unsigned int vtnr) {
         return 0;
 }
 
-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 (!seat_has_vts(s))
-                return 0;
-
-        for (i = 1; i <= s->manager->n_autovts; i++) {
-                int q;
-
-                q = vt_allocate(i);
-                if (q < 0) {
-                        log_error_errno(q, "Failed to preallocate VT %i: %m", i);
-                        r = q;
-                }
-        }
-
-        return r;
-}
-
 int seat_apply_acls(Seat *s, Session *old_active) {
         int r;
 
@@ -272,7 +241,7 @@ int seat_set_active(Seat *s, Session *session) {
 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)
+        if (num == 0)
                 return -EINVAL;
 
         if (num >= s->position_count || !s->positions[num]) {
@@ -289,12 +258,12 @@ int seat_switch_to(Seat *s, unsigned int num) {
 int seat_switch_to_next(Seat *s) {
         unsigned int start, i;
 
-        if (!s->position_count)
+        if (s->position_count == 0)
                 return -EINVAL;
 
         start = 1;
-        if (s->active && s->active->pos > 0)
-                start = s->active->pos;
+        if (s->active && s->active->position > 0)
+                start = s->active->position;
 
         for (i = start + 1; i < s->position_count; ++i)
                 if (s->positions[i])
@@ -310,12 +279,12 @@ int seat_switch_to_next(Seat *s) {
 int seat_switch_to_previous(Seat *s) {
         unsigned int start, i;
 
-        if (!s->position_count)
+        if (s->position_count == 0)
                 return -EINVAL;
 
         start = 1;
-        if (s->active && s->active->pos > 0)
-                start = s->active->pos;
+        if (s->active && s->active->position > 0)
+                start = s->active->position;
 
         for (i = start - 1; i > 0; --i)
                 if (s->positions[i])
@@ -340,14 +309,25 @@ int seat_active_vt_changed(Seat *s, unsigned int 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;
 }
@@ -405,9 +385,6 @@ int seat_start(Seat *s) {
                    LOG_MESSAGE("New seat %s.", s->id),
                    NULL);
 
-        /* Initialize VT magic stuff */
-        seat_preallocate_vts(s);
-
         /* Read current VT */
         seat_read_active_vt(s);
 
@@ -463,21 +440,21 @@ int seat_stop_sessions(Seat *s, bool force) {
 
 void seat_evict_position(Seat *s, Session *session) {
         Session *iter;
-        unsigned int pos = session->pos;
+        unsigned int pos = session->position;
 
-        session->pos = 0;
+        session->position = 0;
 
-        if (!pos)
+        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 lets look
+                 * 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) {
+                        if (iter->position == pos && session_get_state(iter) != SESSION_CLOSING) {
                                 s->positions[pos] = iter;
                                 break;
                         }
@@ -495,15 +472,15 @@ void seat_claim_position(Seat *s, Session *session, unsigned int pos) {
 
         seat_evict_position(s, session);
 
-        session->pos = pos;
-        if (pos > 0 && !s->positions[pos])
+        session->position = pos;
+        if (pos > 0)
                 s->positions[pos] = session;
 }
 
 static void seat_assign_position(Seat *s, Session *session) {
         unsigned int pos;
 
-        if (session->pos > 0)
+        if (session->position > 0)
                 return;
 
         for (pos = 1; pos < s->position_count; ++pos)
@@ -590,7 +567,7 @@ bool seat_can_graphical(Seat *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);