terminal: drop unfinished code

This drops the libsystemd-terminal and systemd-consoled code for various
reasons:

 * It's been sitting there unfinished for over a year now and won't get
   finished any time soon.

 * Since its initial creation, several parts need significant rework: The
   input handling should be replaced with the now commonly used libinput,
   the drm accessors should coordinate the handling of mode-object
   hotplugging (including split connectors) with other DRM users, and the
   internal library users should be converted to sd-device and friends.

 * There is still significant kernel work required before sd-console is
   really useful. This includes, but is not limited to, simpledrm and
   drmlog.

 * The authority daemon is needed before all this code can be used for
   real. And this will definitely take a lot more time to get done as
   no-one else is currently working on this, but me.

 * kdbus maintenance has taken up way more time than I thought and it has
   much higher priority. I don't see me spending much time on the
   terminal code in the near future.

If anyone intends to hack on this, please feel free to contact me. I'll
gladly help you out with any issues. Once kdbus and authorityd are
finished (whenever that will be..) I'll definitely pick this up again. But
until then, lets reduce compile times and maintenance efforts on this code
and drop it for now.

1 files changed, 0 insertions, 482 deletions

diff --git a/src/libsystemd-terminal/modeset.c b/src/libsystemd-terminal/modeset.c
deleted file mode 100644
index 790a244772..0000000000
--- a/src/libsystemd-terminal/modeset.c
+++ /dev/null
@@ -1,482 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
-  This file is part of systemd.
-
-  Copyright (C) 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/>.
-***/
-
-/*
- * Modeset Testing
- * The modeset tool attaches to the session of the caller and shows a
- * test-pattern on all displays of this session. It is meant as debugging tool
- * for the grdev infrastructure.
- */
-
-#include <drm_fourcc.h>
-#include <errno.h>
-#include <getopt.h>
-#include <linux/kd.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/ioctl.h>
-#include <sys/stat.h>
-#include <termios.h>
-#include <unistd.h>
-#include "sd-bus.h"
-#include "sd-event.h"
-#include "sd-login.h"
-#include "build.h"
-#include "macro.h"
-#include "random-util.h"
-#include "signal-util.h"
-#include "util.h"
-#include "grdev.h"
-#include "sysview.h"
-
-typedef struct Modeset Modeset;
-
-struct Modeset {
-        char *session;
-        char *seat;
-        sd_event *event;
-        sd_bus *bus;
-        sd_event_source *exit_src;
-        sysview_context *sysview;
-        grdev_context *grdev;
-        grdev_session *grdev_session;
-
-        uint8_t r, g, b;
-        bool r_up, g_up, b_up;
-
-        bool my_tty : 1;
-        bool managed : 1;
-};
-
-static int modeset_exit_fn(sd_event_source *source, void *userdata) {
-        Modeset *m = userdata;
-
-        if (m->grdev_session)
-                grdev_session_restore(m->grdev_session);
-
-        return 0;
-}
-
-static Modeset *modeset_free(Modeset *m) {
-        if (!m)
-                return NULL;
-
-        m->grdev_session = grdev_session_free(m->grdev_session);
-        m->grdev = grdev_context_unref(m->grdev);
-        m->sysview = sysview_context_free(m->sysview);
-        m->exit_src = sd_event_source_unref(m->exit_src);
-        m->bus = sd_bus_unref(m->bus);
-        m->event = sd_event_unref(m->event);
-        free(m->seat);
-        free(m->session);
-        free(m);
-
-        return NULL;
-}
-
-DEFINE_TRIVIAL_CLEANUP_FUNC(Modeset*, modeset_free);
-
-static bool is_my_tty(const char *session) {
-        unsigned int vtnr;
-        struct stat st;
-        long mode;
-        int r;
-
-        /* Using logind's Controller API is highly fragile if there is already
-         * a session controller running. If it is registered as controller
-         * itself, TakeControl will simply fail. But if its a legacy controller
-         * that does not use logind's controller API, we must never register
-         * our own controller. Otherwise, we really mess up the VT. Therefore,
-         * only run in managed mode if there's no-one else.  Furthermore, never
-         * try to access graphics devices if there's someone else. Unlike input
-         * devices, graphics devies cannot be shared easily. */
-
-        if (!isatty(1))
-                return false;
-
-        if (!session)
-                return false;
-
-        r = sd_session_get_vt(session, &vtnr);
-        if (r < 0 || vtnr < 1 || vtnr > 63)
-                return false;
-
-        mode = 0;
-        r = ioctl(1, KDGETMODE, &mode);
-        if (r < 0 || mode != KD_TEXT)
-                return false;
-
-        r = fstat(1, &st);
-        if (r < 0 || minor(st.st_rdev) != vtnr)
-                return false;
-
-        return true;
-}
-
-static int modeset_new(Modeset **out) {
-        _cleanup_(modeset_freep) Modeset *m = NULL;
-        int r;
-
-        assert(out);
-
-        m = new0(Modeset, 1);
-        if (!m)
-                return log_oom();
-
-        r = sd_pid_get_session(getpid(), &m->session);
-        if (r < 0)
-                return log_error_errno(r, "Cannot retrieve logind session: %m");
-
-        r = sd_session_get_seat(m->session, &m->seat);
-        if (r < 0)
-                return log_error_errno(r, "Cannot retrieve seat of logind session: %m");
-
-        m->my_tty = is_my_tty(m->session);
-        m->managed = m->my_tty && geteuid() > 0;
-
-        m->r = rand() % 0xff;
-        m->g = rand() % 0xff;
-        m->b = rand() % 0xff;
-        m->r_up = m->g_up = m->b_up = true;
-
-        r = sd_event_default(&m->event);
-        if (r < 0)
-                return r;
-
-        r = sd_bus_open_system(&m->bus);
-        if (r < 0)
-                return r;
-
-        r = sd_bus_attach_event(m->bus, m->event, SD_EVENT_PRIORITY_NORMAL);
-        if (r < 0)
-                return r;
-
-        r = sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -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, SIGINT, NULL, NULL);
-        if (r < 0)
-                return r;
-
-        r = sd_event_add_exit(m->event, &m->exit_src, modeset_exit_fn, m);
-        if (r < 0)
-                return r;
-
-        /* schedule before sd-bus close */
-        r = sd_event_source_set_priority(m->exit_src, -10);
-        if (r < 0)
-                return r;
-
-        r = sysview_context_new(&m->sysview,
-                                SYSVIEW_CONTEXT_SCAN_LOGIND |
-                                SYSVIEW_CONTEXT_SCAN_DRM,
-                                m->event,
-                                m->bus,
-                                NULL);
-        if (r < 0)
-                return r;
-
-        r = grdev_context_new(&m->grdev, m->event, m->bus);
-        if (r < 0)
-                return r;
-
-        *out = m;
-        m = NULL;
-        return 0;
-}
-
-static uint8_t next_color(bool *up, uint8_t cur, unsigned int mod) {
-        uint8_t next;
-
-        /* generate smoothly morphing colors */
-
-        next = cur + (*up ? 1 : -1) * (rand() % mod);
-        if ((*up && next < cur) || (!*up && next > cur)) {
-                *up = !*up;
-                next = cur;
-        }
-
-        return next;
-}
-
-static void modeset_draw(Modeset *m, const grdev_display_target *t) {
-        uint32_t j, k, *b;
-        uint8_t *l;
-
-        assert(t->back->format == DRM_FORMAT_XRGB8888 || t->back->format == DRM_FORMAT_ARGB8888);
-        assert(!t->rotate);
-        assert(!t->flip);
-
-        l = t->back->maps[0];
-        for (j = 0; j < t->height; ++j) {
-                for (k = 0; k < t->width; ++k) {
-                        b = (uint32_t*)l;
-                        b[k] = (0xff << 24) | (m->r << 16) | (m->g << 8) | m->b;
-                }
-
-                l += t->back->strides[0];
-        }
-}
-
-static void modeset_render(Modeset *m, grdev_display *d) {
-        const grdev_display_target *t;
-
-        m->r = next_color(&m->r_up, m->r, 4);
-        m->g = next_color(&m->g_up, m->g, 3);
-        m->b = next_color(&m->b_up, m->b, 2);
-
-        GRDEV_DISPLAY_FOREACH_TARGET(d, t) {
-                modeset_draw(m, t);
-                grdev_display_flip_target(d, t);
-        }
-
-        grdev_session_commit(m->grdev_session);
-}
-
-static void modeset_grdev_fn(grdev_session *session, void *userdata, grdev_event *ev) {
-        Modeset *m = userdata;
-
-        switch (ev->type) {
-        case GRDEV_EVENT_DISPLAY_ADD:
-                grdev_display_enable(ev->display_add.display);
-                break;
-        case GRDEV_EVENT_DISPLAY_REMOVE:
-                break;
-        case GRDEV_EVENT_DISPLAY_CHANGE:
-                break;
-        case GRDEV_EVENT_DISPLAY_FRAME:
-                modeset_render(m, ev->display_frame.display);
-                break;
-        }
-}
-
-static int modeset_sysview_fn(sysview_context *c, void *userdata, sysview_event *ev) {
-        unsigned int flags, type;
-        Modeset *m = userdata;
-        sysview_device *d;
-        const char *name;
-        int r;
-
-        switch (ev->type) {
-        case SYSVIEW_EVENT_SESSION_FILTER:
-                if (streq_ptr(m->session, ev->session_filter.id))
-                        return 1;
-
-                break;
-        case SYSVIEW_EVENT_SESSION_ADD:
-                assert(!m->grdev_session);
-
-                name = sysview_session_get_name(ev->session_add.session);
-                flags = 0;
-
-                if (m->managed)
-                        flags |= GRDEV_SESSION_MANAGED;
-
-                r = grdev_session_new(&m->grdev_session,
-                                      m->grdev,
-                                      flags,
-                                      name,
-                                      modeset_grdev_fn,
-                                      m);
-                if (r < 0)
-                        return log_error_errno(r, "Cannot create grdev session: %m");
-
-                if (m->managed) {
-                        r = sysview_session_take_control(ev->session_add.session);
-                        if (r < 0)
-                                return log_error_errno(r, "Cannot request session control: %m");
-                }
-
-                grdev_session_enable(m->grdev_session);
-
-                break;
-        case SYSVIEW_EVENT_SESSION_REMOVE:
-                if (!m->grdev_session)
-                        return 0;
-
-                grdev_session_restore(m->grdev_session);
-                grdev_session_disable(m->grdev_session);
-                m->grdev_session = grdev_session_free(m->grdev_session);
-                if (sd_event_get_exit_code(m->event, &r) == -ENODATA)
-                        sd_event_exit(m->event, 0);
-                break;
-        case SYSVIEW_EVENT_SESSION_ATTACH:
-                d = ev->session_attach.device;
-                type = sysview_device_get_type(d);
-                if (type == SYSVIEW_DEVICE_DRM)
-                        grdev_session_add_drm(m->grdev_session, sysview_device_get_ud(d));
-
-                break;
-        case SYSVIEW_EVENT_SESSION_DETACH:
-                d = ev->session_detach.device;
-                type = sysview_device_get_type(d);
-                if (type == SYSVIEW_DEVICE_DRM)
-                        grdev_session_remove_drm(m->grdev_session, sysview_device_get_ud(d));
-
-                break;
-        case SYSVIEW_EVENT_SESSION_REFRESH:
-                d = ev->session_refresh.device;
-                type = sysview_device_get_type(d);
-                if (type == SYSVIEW_DEVICE_DRM)
-                        grdev_session_hotplug_drm(m->grdev_session, ev->session_refresh.ud);
-
-                break;
-        case SYSVIEW_EVENT_SESSION_CONTROL:
-                r = ev->session_control.error;
-                if (r < 0)
-                        return log_error_errno(r, "Cannot acquire session control: %m");
-
-                r = ioctl(1, KDSKBMODE, K_UNICODE);
-                if (r < 0)
-                        return log_error_errno(errno, "Cannot set K_UNICODE on stdout: %m");
-
-                break;
-        }
-
-        return 0;
-}
-
-static int modeset_run(Modeset *m) {
-        struct termios in_attr, saved_attr;
-        int r;
-
-        assert(m);
-
-        if (!m->my_tty) {
-                log_warning("You need to run this program on a free VT");
-                return -EACCES;
-        }
-
-        if (!m->managed && geteuid() > 0)
-                log_warning("You run in unmanaged mode without being root. This is likely to fail..");
-
-        printf("modeset - Show test pattern on selected graphics devices\n"
-               "          Running on seat '%s' in user-session '%s'\n"
-               "          Exit by pressing ^C\n\n",
-               m->seat ? : "seat0", m->session ? : "<none>");
-
-        r = sysview_context_start(m->sysview, modeset_sysview_fn, m);
-        if (r < 0)
-                goto out;
-
-        r = tcgetattr(0, &in_attr);
-        if (r < 0) {
-                r = -errno;
-                goto out;
-        }
-
-        saved_attr = in_attr;
-        in_attr.c_lflag &= ~ECHO;
-
-        r = tcsetattr(0, TCSANOW, &in_attr);
-        if (r < 0) {
-                r = -errno;
-                goto out;
-        }
-
-        r = sd_event_loop(m->event);
-        tcsetattr(0, TCSANOW, &saved_attr);
-        printf("exiting..\n");
-
-out:
-        sysview_context_stop(m->sysview);
-        return r;
-}
-
-static int help(void) {
-        printf("%s [OPTIONS...]\n\n"
-               "Show test pattern on all selected graphics devices.\n\n"
-               "  -h --help               Show this help\n"
-               "     --version            Show package version\n"
-               , program_invocation_short_name);
-
-        return 0;
-}
-
-static int parse_argv(int argc, char *argv[]) {
-        enum {
-                ARG_VERSION = 0x100,
-        };
-        static const struct option options[] = {
-                { "help",       no_argument,    NULL, 'h'               },
-                { "version",    no_argument,    NULL, ARG_VERSION       },
-                {},
-        };
-        int c;
-
-        assert(argc >= 0);
-        assert(argv);
-
-        while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
-                switch (c) {
-                case 'h':
-                        help();
-                        return 0;
-
-                case ARG_VERSION:
-                        puts(PACKAGE_STRING);
-                        puts(SYSTEMD_FEATURES);
-                        return 0;
-
-                case '?':
-                        return -EINVAL;
-
-                default:
-                        assert_not_reached("Unhandled option");
-                }
-
-        if (argc > optind) {
-                log_error("Too many arguments");
-                return -EINVAL;
-        }
-
-        return 1;
-}
-
-int main(int argc, char *argv[]) {
-        _cleanup_(modeset_freep) Modeset *m = NULL;
-        int r;
-
-        log_set_target(LOG_TARGET_AUTO);
-        log_parse_environment();
-        log_open();
-
-        initialize_srand();
-
-        r = parse_argv(argc, argv);
-        if (r <= 0)
-                goto finish;
-
-        r = modeset_new(&m);
-        if (r < 0)
-                goto finish;
-
-        r = modeset_run(m);
-
-finish:
-        return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
-}