--- /dev/null
+/*-*- 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 <linux/vt.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <systemd/sd-bus.h>
+#include <systemd/sd-event.h>
+#include <systemd/sd-login.h>
+#include <termios.h>
+#include <unistd.h>
+#include "build.h"
+#include "bus-util.h"
+#include "event-util.h"
+#include "grdev.h"
+#include "grdev-internal.h"
+#include "macro.h"
+#include "sysview.h"
+#include "util.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) {
+ log_error("Cannot retrieve logind session: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_session_get_seat(m->session, &m->seat);
+ if (r < 0) {
+ log_error("Cannot retrieve seat of logind session: %s", strerror(-r));
+ return r;
+ }
+
+ 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, 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->fb->format == DRM_FORMAT_XRGB8888 || t->fb->format == DRM_FORMAT_ARGB8888);
+ assert(!t->rotate);
+ assert(!t->flip);
+
+ l = t->fb->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->fb->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, 20);
+ m->g = next_color(&m->g_up, m->g, 10);
+ m->b = next_color(&m->b_up, m->b, 5);
+
+ GRDEV_DISPLAY_FOREACH_TARGET(d, t, 0) {
+ modeset_draw(m, t);
+ grdev_display_flip_target(d, t, 1);
+ }
+
+ 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);
+ modeset_render(m, ev->display_add.display);
+ break;
+ case GRDEV_EVENT_DISPLAY_REMOVE:
+ break;
+ case GRDEV_EVENT_DISPLAY_CHANGE:
+ modeset_render(m, ev->display_change.display);
+ 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) {
+ log_error("Cannot create grdev session: %s", strerror(-r));
+ return r;
+ }
+
+ if (m->managed) {
+ r = sysview_session_take_control(ev->session_add.session);
+ if (r < 0) {
+ log_error("Cannot request session control: %s", strerror(-r));
+ return r;
+ }
+ }
+
+ 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);
+ 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_CONTROL:
+ r = ev->session_control.error;
+ if (r < 0) {
+ log_error("Cannot acquire session control: %s", strerror(-r));
+ return r;
+ }
+
+ r = ioctl(1, KDSKBMODE, K_UNICODE);
+ if (r < 0) {
+ log_error("Cannot set K_UNICODE on stdout: %m");
+ return -errno;
+ }
+
+ 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();
+
+ srand(time(NULL));
+
+ 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;
+}
~ianmdlvl / elogind.git / blobdiff