56f64d9576
If the format string contains %m, clearly errno must have a meaningful value, so we might as well use log_*_errno to have ERRNO= logged. Using: find . -name '*.[ch]' | xargs sed -r -i -e \ 's/log_(debug|info|notice|warning|error|emergency)\((".*%m.*")/log_\1_errno(errno, \2/' Plus some whitespace, linewrap, and indent adjustments.
488 lines
14 KiB
C
488 lines
14 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright (C) 2014 David Herrmann <dh.herrmann@gmail.com>
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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/*
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* Modeset Testing
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* The modeset tool attaches to the session of the caller and shows a
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* test-pattern on all displays of this session. It is meant as debugging tool
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* for the grdev infrastructure.
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*/
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#include <drm_fourcc.h>
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#include <errno.h>
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#include <getopt.h>
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#include <linux/kd.h>
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#include <linux/vt.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <systemd/sd-bus.h>
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#include <systemd/sd-event.h>
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#include <systemd/sd-login.h>
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#include <termios.h>
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#include <unistd.h>
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#include "build.h"
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#include "bus-util.h"
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#include "event-util.h"
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#include "grdev.h"
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#include "grdev-internal.h"
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#include "macro.h"
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#include "sysview.h"
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#include "util.h"
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typedef struct Modeset Modeset;
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struct Modeset {
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char *session;
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char *seat;
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sd_event *event;
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sd_bus *bus;
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sd_event_source *exit_src;
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sysview_context *sysview;
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grdev_context *grdev;
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grdev_session *grdev_session;
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uint8_t r, g, b;
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bool r_up, g_up, b_up;
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bool my_tty : 1;
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bool managed : 1;
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};
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static int modeset_exit_fn(sd_event_source *source, void *userdata) {
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Modeset *m = userdata;
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if (m->grdev_session)
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grdev_session_restore(m->grdev_session);
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return 0;
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}
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static Modeset *modeset_free(Modeset *m) {
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if (!m)
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return NULL;
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m->grdev_session = grdev_session_free(m->grdev_session);
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m->grdev = grdev_context_unref(m->grdev);
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m->sysview = sysview_context_free(m->sysview);
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m->exit_src = sd_event_source_unref(m->exit_src);
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m->bus = sd_bus_unref(m->bus);
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m->event = sd_event_unref(m->event);
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free(m->seat);
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free(m->session);
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free(m);
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return NULL;
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}
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DEFINE_TRIVIAL_CLEANUP_FUNC(Modeset*, modeset_free);
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static bool is_my_tty(const char *session) {
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unsigned int vtnr;
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struct stat st;
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long mode;
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int r;
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/* Using logind's Controller API is highly fragile if there is already
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* a session controller running. If it is registered as controller
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* itself, TakeControl will simply fail. But if its a legacy controller
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* that does not use logind's controller API, we must never register
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* our own controller. Otherwise, we really mess up the VT. Therefore,
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* only run in managed mode if there's no-one else. Furthermore, never
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* try to access graphics devices if there's someone else. Unlike input
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* devices, graphics devies cannot be shared easily. */
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if (!isatty(1))
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return false;
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if (!session)
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return false;
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r = sd_session_get_vt(session, &vtnr);
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if (r < 0 || vtnr < 1 || vtnr > 63)
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return false;
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mode = 0;
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r = ioctl(1, KDGETMODE, &mode);
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if (r < 0 || mode != KD_TEXT)
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return false;
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r = fstat(1, &st);
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if (r < 0 || minor(st.st_rdev) != vtnr)
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return false;
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return true;
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}
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static int modeset_new(Modeset **out) {
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_cleanup_(modeset_freep) Modeset *m = NULL;
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int r;
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assert(out);
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m = new0(Modeset, 1);
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if (!m)
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return log_oom();
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r = sd_pid_get_session(getpid(), &m->session);
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if (r < 0)
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return log_error_errno(r, "Cannot retrieve logind session: %m");
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r = sd_session_get_seat(m->session, &m->seat);
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if (r < 0)
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return log_error_errno(r, "Cannot retrieve seat of logind session: %m");
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m->my_tty = is_my_tty(m->session);
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m->managed = m->my_tty && geteuid() > 0;
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m->r = rand() % 0xff;
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m->g = rand() % 0xff;
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m->b = rand() % 0xff;
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m->r_up = m->g_up = m->b_up = true;
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r = sd_event_default(&m->event);
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if (r < 0)
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return r;
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r = sd_bus_open_system(&m->bus);
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if (r < 0)
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return r;
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r = sd_bus_attach_event(m->bus, m->event, SD_EVENT_PRIORITY_NORMAL);
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if (r < 0)
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return r;
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r = sigprocmask_many(SIG_BLOCK, SIGTERM, SIGINT, -1);
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if (r < 0)
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return r;
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r = sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);
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if (r < 0)
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return r;
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r = sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);
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if (r < 0)
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return r;
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r = sd_event_add_exit(m->event, &m->exit_src, modeset_exit_fn, m);
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if (r < 0)
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return r;
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/* schedule before sd-bus close */
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r = sd_event_source_set_priority(m->exit_src, -10);
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if (r < 0)
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return r;
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r = sysview_context_new(&m->sysview,
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SYSVIEW_CONTEXT_SCAN_LOGIND |
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SYSVIEW_CONTEXT_SCAN_DRM,
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m->event,
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m->bus,
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NULL);
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if (r < 0)
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return r;
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r = grdev_context_new(&m->grdev, m->event, m->bus);
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if (r < 0)
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return r;
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*out = m;
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m = NULL;
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return 0;
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}
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static uint8_t next_color(bool *up, uint8_t cur, unsigned int mod) {
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uint8_t next;
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/* generate smoothly morphing colors */
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next = cur + (*up ? 1 : -1) * (rand() % mod);
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if ((*up && next < cur) || (!*up && next > cur)) {
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*up = !*up;
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next = cur;
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}
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return next;
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}
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static void modeset_draw(Modeset *m, const grdev_display_target *t) {
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uint32_t j, k, *b;
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uint8_t *l;
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assert(t->back->format == DRM_FORMAT_XRGB8888 || t->back->format == DRM_FORMAT_ARGB8888);
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assert(!t->rotate);
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assert(!t->flip);
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l = t->back->maps[0];
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for (j = 0; j < t->height; ++j) {
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for (k = 0; k < t->width; ++k) {
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b = (uint32_t*)l;
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b[k] = (0xff << 24) | (m->r << 16) | (m->g << 8) | m->b;
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}
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l += t->back->strides[0];
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}
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}
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static void modeset_render(Modeset *m, grdev_display *d) {
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const grdev_display_target *t;
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m->r = next_color(&m->r_up, m->r, 4);
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m->g = next_color(&m->g_up, m->g, 3);
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m->b = next_color(&m->b_up, m->b, 2);
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GRDEV_DISPLAY_FOREACH_TARGET(d, t) {
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modeset_draw(m, t);
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grdev_display_flip_target(d, t);
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}
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grdev_session_commit(m->grdev_session);
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}
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static void modeset_grdev_fn(grdev_session *session, void *userdata, grdev_event *ev) {
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Modeset *m = userdata;
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switch (ev->type) {
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case GRDEV_EVENT_DISPLAY_ADD:
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grdev_display_enable(ev->display_add.display);
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break;
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case GRDEV_EVENT_DISPLAY_REMOVE:
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break;
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case GRDEV_EVENT_DISPLAY_CHANGE:
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break;
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case GRDEV_EVENT_DISPLAY_FRAME:
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modeset_render(m, ev->display_frame.display);
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break;
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}
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}
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static int modeset_sysview_fn(sysview_context *c, void *userdata, sysview_event *ev) {
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unsigned int flags, type;
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Modeset *m = userdata;
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sysview_device *d;
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const char *name;
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int r;
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switch (ev->type) {
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case SYSVIEW_EVENT_SESSION_FILTER:
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if (streq_ptr(m->session, ev->session_filter.id))
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return 1;
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break;
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case SYSVIEW_EVENT_SESSION_ADD:
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assert(!m->grdev_session);
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name = sysview_session_get_name(ev->session_add.session);
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flags = 0;
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if (m->managed)
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flags |= GRDEV_SESSION_MANAGED;
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r = grdev_session_new(&m->grdev_session,
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m->grdev,
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flags,
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name,
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modeset_grdev_fn,
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m);
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if (r < 0)
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return log_error_errno(r, "Cannot create grdev session: %m");
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if (m->managed) {
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r = sysview_session_take_control(ev->session_add.session);
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if (r < 0)
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return log_error_errno(r, "Cannot request session control: %m");
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}
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grdev_session_enable(m->grdev_session);
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break;
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case SYSVIEW_EVENT_SESSION_REMOVE:
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if (!m->grdev_session)
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return 0;
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grdev_session_restore(m->grdev_session);
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grdev_session_disable(m->grdev_session);
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m->grdev_session = grdev_session_free(m->grdev_session);
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if (sd_event_get_exit_code(m->event, &r) == -ENODATA)
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sd_event_exit(m->event, 0);
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break;
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case SYSVIEW_EVENT_SESSION_ATTACH:
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d = ev->session_attach.device;
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type = sysview_device_get_type(d);
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if (type == SYSVIEW_DEVICE_DRM)
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grdev_session_add_drm(m->grdev_session, sysview_device_get_ud(d));
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break;
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case SYSVIEW_EVENT_SESSION_DETACH:
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d = ev->session_detach.device;
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type = sysview_device_get_type(d);
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if (type == SYSVIEW_DEVICE_DRM)
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grdev_session_remove_drm(m->grdev_session, sysview_device_get_ud(d));
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break;
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case SYSVIEW_EVENT_SESSION_REFRESH:
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d = ev->session_refresh.device;
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type = sysview_device_get_type(d);
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if (type == SYSVIEW_DEVICE_DRM)
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grdev_session_hotplug_drm(m->grdev_session, ev->session_refresh.ud);
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break;
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case SYSVIEW_EVENT_SESSION_CONTROL:
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r = ev->session_control.error;
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if (r < 0)
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return log_error_errno(r, "Cannot acquire session control: %m");
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r = ioctl(1, KDSKBMODE, K_UNICODE);
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if (r < 0) {
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log_error_errno(errno, "Cannot set K_UNICODE on stdout: %m");
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return -errno;
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}
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break;
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}
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return 0;
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}
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static int modeset_run(Modeset *m) {
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struct termios in_attr, saved_attr;
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int r;
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assert(m);
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if (!m->my_tty) {
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log_warning("You need to run this program on a free VT");
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return -EACCES;
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}
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if (!m->managed && geteuid() > 0)
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log_warning("You run in unmanaged mode without being root. This is likely to fail..");
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printf("modeset - Show test pattern on selected graphics devices\n"
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" Running on seat '%s' in user-session '%s'\n"
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" Exit by pressing ^C\n\n",
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m->seat ? : "seat0", m->session ? : "<none>");
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r = sysview_context_start(m->sysview, modeset_sysview_fn, m);
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if (r < 0)
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goto out;
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r = tcgetattr(0, &in_attr);
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if (r < 0) {
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r = -errno;
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goto out;
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}
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saved_attr = in_attr;
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in_attr.c_lflag &= ~ECHO;
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r = tcsetattr(0, TCSANOW, &in_attr);
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if (r < 0) {
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r = -errno;
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goto out;
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}
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r = sd_event_loop(m->event);
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tcsetattr(0, TCSANOW, &saved_attr);
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printf("exiting..\n");
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out:
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sysview_context_stop(m->sysview);
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return r;
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}
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static int help(void) {
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printf("%s [OPTIONS...]\n\n"
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"Show test pattern on all selected graphics devices.\n\n"
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" -h --help Show this help\n"
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" --version Show package version\n"
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, program_invocation_short_name);
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return 0;
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}
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static int parse_argv(int argc, char *argv[]) {
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enum {
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ARG_VERSION = 0x100,
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};
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static const struct option options[] = {
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{ "help", no_argument, NULL, 'h' },
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{ "version", no_argument, NULL, ARG_VERSION },
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{},
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};
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int c;
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assert(argc >= 0);
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assert(argv);
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while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
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switch (c) {
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case 'h':
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help();
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return 0;
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case ARG_VERSION:
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puts(PACKAGE_STRING);
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puts(SYSTEMD_FEATURES);
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return 0;
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case '?':
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return -EINVAL;
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default:
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assert_not_reached("Unhandled option");
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}
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if (argc > optind) {
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log_error("Too many arguments");
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return -EINVAL;
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}
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return 1;
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}
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int main(int argc, char *argv[]) {
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_cleanup_(modeset_freep) Modeset *m = NULL;
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int r;
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log_set_target(LOG_TARGET_AUTO);
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log_parse_environment();
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log_open();
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initialize_srand();
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r = parse_argv(argc, argv);
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if (r <= 0)
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goto finish;
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r = modeset_new(&m);
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if (r < 0)
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goto finish;
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r = modeset_run(m);
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finish:
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return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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