From ce7b9f50c3fadbad22feeb28e4429ad9bee02bcc Mon Sep 17 00:00:00 2001

From: David Herrmann <dh.herrmann@gmail.com>

Date: Fri, 3 Oct 2014 15:58:44 +0200

Subject: [PATCH] console: add user console daemon

This adds a first draft of systemd-consoled. This is still missing a lot

of features and does some rather primitive rendering. However, it shows

the direction this code is going and serves as basis for further testing.

The systemd-consoled binary should be run as `systemd --user' unit. It

automatically picks up any session marked as Desktop=SYSTEMD-CONSOLE.

Therefore, you can use any login-manager you want (ranging from /bin/login

to gdm) to create sessions for systemd-consoled. However, the sessions

managers must be prepared to set the Desktop= variable properly.

The user-session is called `systemd-console', only the daemon providing

the terminal environment is called `systemd-consoled' (mind the 'd').

So far, only a single terminal session is provided on each opened

user-session. However, we support multiple user-sessions (even across

multiple seats) just fine. In the future, the workspace logic will get

extended so you can have multiple terminal sessions in a single

user-session for easier access.

Note that this is still experimental! Instructions on how to run it will

follow shortly.

---

 .gitignore                       |   1 +

 Makefile.am                      |  22 +++

 src/console/Makefile             |   1 +

 src/console/consoled-display.c   |  82 +++++++++

 src/console/consoled-manager.c   | 288 +++++++++++++++++++++++++++++++

 src/console/consoled-session.c   | 283 ++++++++++++++++++++++++++++++

 src/console/consoled-terminal.c  | 360 +++++++++++++++++++++++++++++++++++++++

 src/console/consoled-workspace.c | 168 ++++++++++++++++++

 src/console/consoled.c           |  67 ++++++++

 src/console/consoled.h           | 170 ++++++++++++++++++

 10 files changed, 1442 insertions(+)

 create mode 120000 src/console/Makefile

 create mode 100644 src/console/consoled-display.c

 create mode 100644 src/console/consoled-manager.c

 create mode 100644 src/console/consoled-session.c

 create mode 100644 src/console/consoled-terminal.c

 create mode 100644 src/console/consoled-workspace.c

 create mode 100644 src/console/consoled.c

 create mode 100644 src/console/consoled.h

diff --git a/.gitignore b/.gitignore

index cb1af8de5b..f119b574c7 100644

--- a/.gitignore

+++ b/.gitignore

@@ -60,6 +60,7 @@

 /systemd-cgls

 /systemd-cgroups-agent

 /systemd-cgtop

+/systemd-consoled

 /systemd-coredump

 /systemd-cryptsetup

 /systemd-cryptsetup-generator

diff --git a/Makefile.am b/Makefile.am

index 503302851b..60011b7d98 100644

--- a/Makefile.am

+++ b/Makefile.am

@@ -3020,6 +3020,9 @@ if ENABLE_TERMINAL

 noinst_LTLIBRARIES += \

 	libsystemd-terminal.la

+bin_PROGRAMS += \

+	systemd-consoled

+

 noinst_PROGRAMS += \

 	systemd-evcat \

 	systemd-modeset \

@@ -3068,6 +3071,25 @@ libsystemd_terminal_la_LIBADD = \

 	libsystemd-shared.la \

 	$(TERMINAL_LIBS)

+systemd_consoled_CFLAGS = \

+	$(AM_CFLAGS) \

+	$(TERMINAL_CFLAGS)

+

+systemd_consoled_SOURCES = \

+	src/console/consoled.h \

+	src/console/consoled.c \

+	src/console/consoled-display.c \

+	src/console/consoled-manager.c \

+	src/console/consoled-session.c \

+	src/console/consoled-terminal.c \

+	src/console/consoled-workspace.c

+

+systemd_consoled_LDADD = \

+	libsystemd-terminal.la \

+	libsystemd-internal.la \

+	libsystemd-shared.la \

+	$(TERMINAL_LIBS)

+

 systemd_evcat_CFLAGS = \

 	$(AM_CFLAGS) \

 	$(TERMINAL_CFLAGS)

diff --git a/src/console/Makefile b/src/console/Makefile

new file mode 120000

index 0000000000..d0b0e8e008

--- /dev/null

+++ b/src/console/Makefile

@@ -0,0 +1 @@

+../Makefile

\ No newline at end of file

diff --git a/src/console/consoled-display.c b/src/console/consoled-display.c

new file mode 100644

index 0000000000..a30a2f1022

--- /dev/null

+++ b/src/console/consoled-display.c

@@ -0,0 +1,82 @@

+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

+

+/***

+  This file is part of systemd.

+

+  Copyright 2014 David Herrmann <dh.herrmann@gmail.com>

+

+  systemd is free software; you can redistribute it and/or modify it

+  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

+  Lesser General Public License for more details.

+

+  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 <errno.h>

+#include <inttypes.h>

+#include <stdlib.h>

+#include "consoled.h"

+#include "grdev.h"

+#include "list.h"

+#include "macro.h"

+#include "util.h"

+

+int display_new(Display **out, Session *s, grdev_display *display) {

+        _cleanup_(display_freep) Display *d = NULL;

+

+        assert(out);

+        assert(s);

+        assert(display);

+

+        d = new0(Display, 1);

+        if (!d)

+                return -ENOMEM;

+

+        d->session = s;

+        d->grdev = display;

+        d->width = grdev_display_get_width(display);

+        d->height = grdev_display_get_height(display);

+        LIST_PREPEND(displays_by_session, d->session->display_list, d);

+

+        grdev_display_enable(display);

+

+        *out = d;

+        d = NULL;

+        return 0;

+}

+

+Display *display_free(Display *d) {

+        if (!d)

+                return NULL;

+

+        LIST_REMOVE(displays_by_session, d->session->display_list, d);

+        free(d);

+

+        return NULL;

+}

+

+void display_refresh(Display *d) {

+        assert(d);

+

+        d->width = grdev_display_get_width(d->grdev);

+        d->height = grdev_display_get_height(d->grdev);

+}

+

+void display_render(Display *d, Workspace *w) {

+        const grdev_display_target *target;

+

+        assert(d);

+        assert(w);

+

+        GRDEV_DISPLAY_FOREACH_TARGET(d->grdev, target) {

+                if (workspace_draw(w, target))

+                        grdev_display_flip_target(d->grdev, target);

+        }

+}

diff --git a/src/console/consoled-manager.c b/src/console/consoled-manager.c

new file mode 100644

index 0000000000..8f3823fe46

--- /dev/null

+++ b/src/console/consoled-manager.c

@@ -0,0 +1,288 @@

+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

+

+/***

+  This file is part of systemd.

+

+  Copyright 2014 David Herrmann <dh.herrmann@gmail.com>

+

+  systemd is free software; you can redistribute it and/or modify it

+  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

+  Lesser General Public License for more details.

+

+  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 <errno.h>

+#include <libudev.h>

+#include <stdlib.h>

+#include <string.h>

+#include "consoled.h"

+#include "grdev.h"

+#include "idev.h"

+#include "log.h"

+#include "sd-bus.h"

+#include "sd-daemon.h"

+#include "sd-event.h"

+#include "sd-login.h"

+#include "sysview.h"

+#include "unifont.h"

+#include "util.h"

+

+int manager_new(Manager **out) {

+        _cleanup_(manager_freep) Manager *m = NULL;

+        int r;

+

+        assert(out);

+

+        m = new0(Manager, 1);

+        if (!m)

+                return -ENOMEM;

+

+        r = sd_event_default(&m->event);

+        if (r < 0)

+                return r;

+

+        r = sd_event_set_watchdog(m->event, true);

+        if (r < 0)

+                return r;

+

+        r = sigprocmask_many(SIG_BLOCK, SIGTERM, SIGQUIT, SIGINT, SIGWINCH, SIGCHLD, -1);

+        if (r < 0)

+                return r;

+

+        r = sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);

+        if (r < 0)

+                return r;

+

+        r = sd_event_add_signal(m->event, NULL, SIGQUIT, NULL, NULL);

+        if (r < 0)

+                return r;

+

+        r = sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);

+        if (r < 0)

+                return r;

+

+        r = sd_bus_open_system(&m->sysbus);

+        if (r < 0)

+                return r;

+

+        r = sd_bus_attach_event(m->sysbus, m->event, SD_EVENT_PRIORITY_NORMAL);

+        if (r < 0)

+                return r;

+

+        r = unifont_new(&m->uf);

+        if (r < 0)

+                return r;

+

+        r = sysview_context_new(&m->sysview,

+                                SYSVIEW_CONTEXT_SCAN_LOGIND |

+                                SYSVIEW_CONTEXT_SCAN_EVDEV |

+                                SYSVIEW_CONTEXT_SCAN_DRM,

+                                m->event,

+                                m->sysbus,

+                                NULL);

+        if (r < 0)

+                return r;

+

+        r = grdev_context_new(&m->grdev, m->event, m->sysbus);

+        if (r < 0)

+                return r;

+

+        r = idev_context_new(&m->idev, m->event, m->sysbus);

+        if (r < 0)

+                return r;

+

+        *out = m;

+        m = NULL;

+        return 0;

+}

+

+Manager *manager_free(Manager *m) {

+        if (!m)

+                return NULL;

+

+        assert(!m->workspace_list);

+

+        m->idev = idev_context_unref(m->idev);

+        m->grdev = grdev_context_unref(m->grdev);

+        m->sysview = sysview_context_free(m->sysview);

+        m->uf = unifont_unref(m->uf);

+        m->sysbus = sd_bus_unref(m->sysbus);

+        m->event = sd_event_unref(m->event);

+        free(m);

+

+        return NULL;

+}

+

+static int manager_sysview_session_filter(Manager *m, sysview_event *event) {

+        const char *sid = event->session_filter.id;

+        _cleanup_free_ char *desktop = NULL;

+        int r;

+

+        assert(sid);

+

+        r = sd_session_get_desktop(sid, &desktop);

+        if (r < 0)

+                return 0;

+

+        return streq(desktop, "SYSTEMD-CONSOLE");

+}

+

+static int manager_sysview_session_add(Manager *m, sysview_event *event) {

+        sysview_session *session = event->session_add.session;

+        Session *s;

+        int r;

+

+        r = sysview_session_take_control(session);

+        if (r < 0) {

+                log_error("Cannot request session control on '%s': %s",

+                          sysview_session_get_name(session), strerror(-r));

+                return r;

+        }

+

+        r = session_new(&s, m, session);

+        if (r < 0) {

+                log_error("Cannot create session on '%s': %s",

+                          sysview_session_get_name(session), strerror(-r));

+                sysview_session_release_control(session);

+                return r;

+        }

+

+        sysview_session_set_userdata(session, s);

+

+        return 0;

+}

+

+static int manager_sysview_session_remove(Manager *m, sysview_event *event) {

+        sysview_session *session = event->session_remove.session;

+        Session *s;

+

+        s = sysview_session_get_userdata(session);

+        if (!s)

+                return 0;

+

+        session_free(s);

+

+        return 0;

+}

+

+static int manager_sysview_session_attach(Manager *m, sysview_event *event) {

+        sysview_session *session = event->session_attach.session;

+        sysview_device *device = event->session_attach.device;

+        Session *s;

+

+        s = sysview_session_get_userdata(session);

+        if (!s)

+                return 0;

+

+        session_add_device(s, device);

+

+        return 0;

+}

+

+static int manager_sysview_session_detach(Manager *m, sysview_event *event) {

+        sysview_session *session = event->session_detach.session;

+        sysview_device *device = event->session_detach.device;

+        Session *s;

+

+        s = sysview_session_get_userdata(session);

+        if (!s)

+                return 0;

+

+        session_remove_device(s, device);

+

+        return 0;

+}

+

+static int manager_sysview_session_refresh(Manager *m, sysview_event *event) {

+        sysview_session *session = event->session_refresh.session;

+        sysview_device *device = event->session_refresh.device;

+        struct udev_device *ud = event->session_refresh.ud;

+        Session *s;

+

+        s = sysview_session_get_userdata(session);

+        if (!s)

+                return 0;

+

+        session_refresh_device(s, device, ud);

+

+        return 0;

+}

+

+static int manager_sysview_session_control(Manager *m, sysview_event *event) {

+        sysview_session *session = event->session_control.session;

+        int error = event->session_control.error;

+        Session *s;

+

+        s = sysview_session_get_userdata(session);

+        if (!s)

+                return 0;

+

+        if (error < 0) {

+                log_error("Cannot take session control on '%s': %s",

+                          sysview_session_get_name(session), strerror(-error));

+                session_free(s);

+                sysview_session_set_userdata(session, NULL);

+                return -error;

+        }

+

+        return 0;

+}

+

+static int manager_sysview_fn(sysview_context *sysview, void *userdata, sysview_event *event) {

+        Manager *m = userdata;

+        int r;

+

+        assert(m);

+

+        switch (event->type) {

+        case SYSVIEW_EVENT_SESSION_FILTER:

+                r = manager_sysview_session_filter(m, event);

+                break;

+        case SYSVIEW_EVENT_SESSION_ADD:

+                r = manager_sysview_session_add(m, event);

+                break;

+        case SYSVIEW_EVENT_SESSION_REMOVE:

+                r = manager_sysview_session_remove(m, event);

+                break;

+        case SYSVIEW_EVENT_SESSION_ATTACH:

+                r = manager_sysview_session_attach(m, event);

+                break;

+        case SYSVIEW_EVENT_SESSION_DETACH:

+                r = manager_sysview_session_detach(m, event);

+                break;

+        case SYSVIEW_EVENT_SESSION_REFRESH:

+                r = manager_sysview_session_refresh(m, event);

+                break;

+        case SYSVIEW_EVENT_SESSION_CONTROL:

+                r = manager_sysview_session_control(m, event);

+                break;

+        default:

+                r = 0;

+                break;

+        }

+

+        return r;

+}

+

+int manager_run(Manager *m) {

+        int r;

+

+        assert(m);

+

+        r = sysview_context_start(m->sysview, manager_sysview_fn, m);

+        if (r < 0)

+                return r;

+

+        r = sd_event_loop(m->event);

+

+        sysview_context_stop(m->sysview);

+        return r;

+}

diff --git a/src/console/consoled-session.c b/src/console/consoled-session.c

new file mode 100644

index 0000000000..8bacacab35

--- /dev/null

+++ b/src/console/consoled-session.c

@@ -0,0 +1,283 @@

+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

+

+/***

+  This file is part of systemd.

+

+  Copyright 2014 David Herrmann <dh.herrmann@gmail.com>

+

+  systemd is free software; you can redistribute it and/or modify it

+  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

+  Lesser General Public License for more details.

+

+  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 <errno.h>

+#include <inttypes.h>

+#include <libudev.h>

+#include <stdlib.h>

+#include "consoled.h"

+#include "grdev.h"

+#include "hashmap.h"

+#include "idev.h"

+#include "list.h"

+#include "macro.h"

+#include "sd-bus.h"

+#include "sd-event.h"

+#include "sysview.h"

+#include "util.h"

+

+static bool session_feed_keyboard(Session *s, idev_data *data) {

+        idev_data_keyboard *kdata = &data->keyboard;

+

+        if (!data->resync && kdata->value == 1 && kdata->n_syms == 1) {

+                uint32_t nr;

+                sysview_seat *seat;

+

+                /* handle VT-switch requests */

+                nr = 0;

+

+                switch (kdata->keysyms[0]) {

+                case XKB_KEY_F1 ... XKB_KEY_F12:

+                        if (IDEV_KBDMATCH(kdata,

+                                          IDEV_KBDMOD_CTRL | IDEV_KBDMOD_ALT,

+                                          kdata->keysyms[0]))

+                                nr = kdata->keysyms[0] - XKB_KEY_F1 + 1;

+                        break;

+                case XKB_KEY_XF86Switch_VT_1 ... XKB_KEY_XF86Switch_VT_12:

+                        nr = kdata->keysyms[0] - XKB_KEY_XF86Switch_VT_1 + 1;

+                        break;

+                }

+

+                if (nr != 0) {

+                        seat = sysview_session_get_seat(s->sysview);

+                        sysview_seat_switch_to(seat, nr);

+                        return true;

+                }

+        }

+

+        return false;

+}

+

+static bool session_feed(Session *s, idev_data *data) {

+        switch (data->type) {

+        case IDEV_DATA_KEYBOARD:

+                return session_feed_keyboard(s, data);

+        default:

+                return false;

+        }

+}

+

+static int session_idev_fn(idev_session *idev, void *userdata, idev_event *event) {

+        Session *s = userdata;

+

+        switch (event->type) {

+        case IDEV_EVENT_DEVICE_ADD:

+                idev_device_enable(event->device_add.device);

+                break;

+        case IDEV_EVENT_DEVICE_REMOVE:

+                idev_device_disable(event->device_remove.device);

+                break;

+        case IDEV_EVENT_DEVICE_DATA:

+                if (!session_feed(s, &event->device_data.data))

+                        workspace_feed(s->active_ws, &event->device_data.data);

+                break;

+        }

+

+        return 0;

+}

+

+static void session_grdev_fn(grdev_session *grdev, void *userdata, grdev_event *event) {

+        grdev_display *display;

+        Session *s = userdata;

+        Display *d;

+        int r;

+

+        switch (event->type) {

+        case GRDEV_EVENT_DISPLAY_ADD:

+                display = event->display_add.display;

+

+                r = display_new(&d, s, display);

+                if (r < 0) {

+                        log_error("Cannot create display '%s' on '%s': %s",

+                                  grdev_display_get_name(display), sysview_session_get_name(s->sysview), strerror(-r));

+                        break;

+                }

+

+                grdev_display_set_userdata(display, d);

+                workspace_refresh(s->active_ws);

+                break;

+        case GRDEV_EVENT_DISPLAY_REMOVE:

+                display = event->display_remove.display;

+                d = grdev_display_get_userdata(display);

+                if (!d)

+                        break;

+

+                display_free(d);

+                workspace_refresh(s->active_ws);

+                break;

+        case GRDEV_EVENT_DISPLAY_CHANGE:

+                display = event->display_remove.display;

+                d = grdev_display_get_userdata(display);

+                if (!d)

+                        break;

+

+                display_refresh(d);

+                workspace_refresh(s->active_ws);

+                break;

+        case GRDEV_EVENT_DISPLAY_FRAME:

+                display = event->display_remove.display;

+                d = grdev_display_get_userdata(display);

+                if (!d)

+                        break;

+

+                session_dirty(s);

+                break;

+        }

+}

+

+static int session_redraw_fn(sd_event_source *src, void *userdata) {

+        Session *s = userdata;

+        Display *d;

+

+        LIST_FOREACH(displays_by_session, d, s->display_list)

+                display_render(d, s->active_ws);

+

+        grdev_session_commit(s->grdev);

+

+        return 0;

+}

+

+int session_new(Session **out, Manager *m, sysview_session *session) {

+        _cleanup_(session_freep) Session *s = NULL;

+        int r;

+

+        assert(out);

+        assert(m);

+        assert(session);

+

+        s = new0(Session, 1);

+        if (!s)

+                return -ENOMEM;

+

+        s->manager = m;

+        s->sysview = session;

+

+        r = grdev_session_new(&s->grdev,

+                              m->grdev,

+                              GRDEV_SESSION_MANAGED,

+                              sysview_session_get_name(session),

+                              session_grdev_fn,

+                              s);

+        if (r < 0)

+                return r;

+

+        r = idev_session_new(&s->idev,

+                             m->idev,

+                             IDEV_SESSION_MANAGED,

+                             sysview_session_get_name(session),

+                             session_idev_fn,

+                             s);

+        if (r < 0)

+                return r;

+

+        r = workspace_new(&s->my_ws, m);

+        if (r < 0)

+                return r;

+

+        s->active_ws = workspace_attach(s->my_ws, s);

+

+        r = sd_event_add_defer(m->event, &s->redraw_src, session_redraw_fn, s);

+        if (r < 0)

+                return r;

+

+        grdev_session_enable(s->grdev);

+        idev_session_enable(s->idev);

+

+        *out = s;

+        s = NULL;

+        return 0;

+}

+

+Session *session_free(Session *s) {

+        if (!s)

+                return NULL;

+

+        assert(!s->display_list);

+

+        sd_event_source_unref(s->redraw_src);

+

+        workspace_detach(s->active_ws, s);

+        workspace_unref(s->my_ws);

+

+        idev_session_free(s->idev);

+        grdev_session_free(s->grdev);

+        free(s);

+

+        return NULL;

+}

+

+void session_dirty(Session *s) {

+        int r;

+

+        assert(s);

+

+        r = sd_event_source_set_enabled(s->redraw_src, SD_EVENT_ONESHOT);

+        if (r < 0)

+                log_error("Cannot enable redraw-source: %s", strerror(-r));

+}

+

+void session_add_device(Session *s, sysview_device *device) {

+        unsigned int type;

+

+        assert(s);

+        assert(device);

+

+        type = sysview_device_get_type(device);

+        switch (type) {

+        case SYSVIEW_DEVICE_DRM:

+                grdev_session_add_drm(s->grdev, sysview_device_get_ud(device));

+                break;

+        case SYSVIEW_DEVICE_EVDEV:

+                idev_session_add_evdev(s->idev, sysview_device_get_ud(device));

+                break;

+        }

+}

+

+void session_remove_device(Session *s, sysview_device *device) {

+        unsigned int type;

+

+        assert(s);

+        assert(device);

+

+        type = sysview_device_get_type(device);

+        switch (type) {

+        case SYSVIEW_DEVICE_DRM:

+                grdev_session_remove_drm(s->grdev, sysview_device_get_ud(device));

+                break;

+        case SYSVIEW_DEVICE_EVDEV:

+                idev_session_remove_evdev(s->idev, sysview_device_get_ud(device));

+                break;

+        }

+}

+

+void session_refresh_device(Session *s, sysview_device *device, struct udev_device *ud) {

+        unsigned int type;

+

+        assert(s);

+        assert(device);

+

+        type = sysview_device_get_type(device);

+        switch (type) {

+        case SYSVIEW_DEVICE_DRM:

+                grdev_session_hotplug_drm(s->grdev, sysview_device_get_ud(device));

+                break;

+        }

+}

diff --git a/src/console/consoled-terminal.c b/src/console/consoled-terminal.c

new file mode 100644

index 0000000000..d091579aa5

--- /dev/null

+++ b/src/console/consoled-terminal.c

@@ -0,0 +1,360 @@

+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

+

+/***

+  This file is part of systemd.

+

+  Copyright 2014 David Herrmann <dh.herrmann@gmail.com>

+

+  systemd is free software; you can redistribute it and/or modify it

+  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

+  Lesser General Public License for more details.

+

+  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 <errno.h>

+#include <inttypes.h>

+#include <stdlib.h>

+#include "consoled.h"

+#include "list.h"

+#include "macro.h"

+#include "util.h"

+

+static int terminal_write_fn(term_screen *screen, void *userdata, const void *buf, size_t size) {

+        Terminal *t = userdata;

+        int r;

+

+        if (t->pty) {

+                r = pty_write(t->pty, buf, size);

+                if (r < 0)

+                        return log_oom();

+        }

+

+        return 0;

+}

+

+static int terminal_pty_fn(Pty *pty, void *userdata, unsigned int event, const void *ptr, size_t size) {

+        Terminal *t = userdata;

+        int r;

+

+        switch (event) {

+        case PTY_CHILD:

+                log_debug("PTY child exited");

+                t->pty = pty_unref(t->pty);

+                break;

+        case PTY_DATA:

+                r = term_screen_feed_text(t->screen, ptr, size);

+                if (r < 0)

+                        log_error("Cannot update screen state: %s", strerror(-r));

+

+                workspace_dirty(t->workspace);

+                break;

+        }

+

+        return 0;

+}

+

+int terminal_new(Terminal **out, Workspace *w) {

+        _cleanup_(terminal_freep) Terminal *t = NULL;

+        int r;

+

+        assert(w);

+

+        t = new0(Terminal, 1);

+        if (!t)

+                return -ENOMEM;

+

+        t->workspace = w;

+        LIST_PREPEND(terminals_by_workspace, w->terminal_list, t);

+

+        r = term_parser_new(&t->parser, true);

+        if (r < 0)

+                return r;

+

+        r = term_screen_new(&t->screen, terminal_write_fn, t, NULL, NULL);

+        if (r < 0)

+                return r;

+

+        r = term_screen_set_answerback(t->screen, "systemd-console");

+        if (r < 0)

+                return r;

+

+        if (out)

+                *out = t;

+        t = NULL;

+        return 0;

+}

+