chiark / gitweb /
login: use normal comparison to zero for integers
[elogind.git] / src / login / logind-seat.c
index 96cf08e..887de47 100644 (file)
   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;
@@ -120,9 +117,9 @@ int seat_save(Seat *s) {
 
                 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) {
@@ -154,7 +151,7 @@ int seat_save(Seat *s) {
 
 finish:
         if (r < 0)
-                log_error("Failed to save seat data %s: %s", s->state_file, strerror(-r));
+                log_error_errno(r, "Failed to save seat data %s: %m", s->state_file);
 
         return r;
 }
@@ -168,14 +165,12 @@ int seat_load(Seat *s) {
 }
 
 static int vt_allocate(unsigned int vtnr) {
-        _cleanup_free_ char *p = NULL;
+        char p[sizeof("/dev/tty") + DECIMAL_STR_MAX(unsigned int)];
         _cleanup_close_ int fd = -1;
 
         assert(vtnr >= 1);
 
-        if (asprintf(&p, "/dev/tty%u", vtnr) < 0)
-                return -ENOMEM;
-
+        snprintf(p, sizeof(p), "/dev/tty%u", vtnr);
         fd = open_terminal(p, O_RDWR|O_NOCTTY|O_CLOEXEC);
         if (fd < 0)
                 return -errno;
@@ -183,34 +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("Failed to preallocate VT %i: %s", i, strerror(-q));
-                        r = q;
-                }
-        }
-
-        return r;
-}
-
 int seat_apply_acls(Seat *s, Session *old_active) {
         int r;
 
@@ -223,7 +190,7 @@ 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;
 }
@@ -274,11 +241,16 @@ 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])
+        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]);
 }
@@ -286,7 +258,7 @@ 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;
@@ -307,7 +279,7 @@ 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;
@@ -337,14 +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;
 }
@@ -397,14 +380,11 @@ int seat_start(Seat *s) {
                 return 0;
 
         log_struct(LOG_INFO,
-                   MESSAGE_ID(SD_MESSAGE_SEAT_START),
+                   LOG_MESSAGE_ID(SD_MESSAGE_SEAT_START),
                    "SEAT_ID=%s", s->id,
-                   "MESSAGE=New seat %s.", s->id,
+                   LOG_MESSAGE("New seat %s.", s->id),
                    NULL);
 
-        /* Initialize VT magic stuff */
-        seat_preallocate_vts(s);
-
         /* Read current VT */
         seat_read_active_vt(s);
 
@@ -425,9 +405,9 @@ int seat_stop(Seat *s, bool force) {
 
         if (s->started)
                 log_struct(LOG_INFO,
-                           MESSAGE_ID(SD_MESSAGE_SEAT_STOP),
+                           LOG_MESSAGE_ID(SD_MESSAGE_SEAT_STOP),
                            "SEAT_ID=%s", s->id,
-                           "MESSAGE=Removed seat %s.", s->id,
+                           LOG_MESSAGE("Removed seat %s.", s->id),
                            NULL);
 
         seat_stop_sessions(s, force);
@@ -464,14 +444,14 @@ void seat_evict_position(Seat *s, Session *session) {
 
         session->pos = 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) {
@@ -487,7 +467,7 @@ void seat_claim_position(Seat *s, Session *session, unsigned int pos) {
         if (seat_has_vts(s))
                 pos = session->vtnr;
 
-        if (!GREEDY_REALLOC0_T(s->positions, s->position_count, pos + 1))
+        if (!GREEDY_REALLOC0(s->positions, s->position_count, pos + 1))
                 return;
 
         seat_evict_position(s, session);
@@ -587,7 +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);