wlroots-hyprland/backend/session/direct-freebsd.c

249 lines
6.2 KiB
C
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#include <assert.h>
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#include <dev/evdev/input.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/consio.h>
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#include <sys/ioctl.h>
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#include <sys/kbio.h>
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#include <sys/stat.h>
#include <sys/types.h>
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#include <termios.h>
#include <unistd.h>
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#include <wayland-server.h>
#include <wlr/backend/session/interface.h>
#include <wlr/util/log.h>
#include <xf86drm.h>
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#include "backend/session/direct-ipc.h"
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#include "util/signal.h"
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const struct session_impl session_direct;
struct direct_session {
struct wlr_session base;
int tty_fd;
int old_tty;
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int old_kbmode;
int sock;
pid_t child;
struct wl_event_source *vt_source;
};
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static struct direct_session *direct_session_from_session(
struct wlr_session *base) {
assert(base->impl == &session_direct);
return (struct direct_session *)base;
}
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static int direct_session_open(struct wlr_session *base, const char *path) {
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struct direct_session *session = direct_session_from_session(base);
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int fd = direct_ipc_open(session->sock, path);
if (fd < 0) {
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wlr_log(WLR_ERROR, "Failed to open %s: %s%s", path, strerror(-fd),
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fd == -EINVAL ? "; is another display server running?" : "");
return fd;
}
return fd;
}
static void direct_session_close(struct wlr_session *base, int fd) {
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struct direct_session *session = direct_session_from_session(base);
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int ev;
struct drm_version dv = {0};
if (ioctl(fd, DRM_IOCTL_VERSION, &dv) == 0) {
direct_ipc_dropmaster(session->sock, fd);
} else if (ioctl(fd, EVIOCGVERSION, &ev) == 0) {
ioctl(fd, EVIOCREVOKE, 0);
}
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close(fd);
}
static bool direct_change_vt(struct wlr_session *base, unsigned vt) {
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struct direct_session *session = direct_session_from_session(base);
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return ioctl(session->tty_fd, VT_ACTIVATE, (int)vt) == 0;
}
static void direct_session_destroy(struct wlr_session *base) {
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struct direct_session *session = direct_session_from_session(base);
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struct vt_mode mode = {
.mode = VT_AUTO,
};
errno = 0;
ioctl(session->tty_fd, KDSKBMODE, session->old_kbmode);
ioctl(session->tty_fd, KDSETMODE, KD_TEXT);
ioctl(session->tty_fd, VT_SETMODE, &mode);
ioctl(session->tty_fd, VT_ACTIVATE, session->old_tty);
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if (errno) {
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wlr_log(WLR_ERROR, "Failed to restore tty");
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}
direct_ipc_finish(session->sock, session->child);
close(session->sock);
wl_event_source_remove(session->vt_source);
close(session->tty_fd);
free(session);
}
static int vt_handler(int signo, void *data) {
struct direct_session *session = data;
struct drm_version dv = {0};
struct wlr_device *dev;
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if (session->base.active) {
session->base.active = false;
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wlr_signal_emit_safe(&session->base.session_signal, session);
wl_list_for_each(dev, &session->base.devices, link) {
if (ioctl(dev->fd, DRM_IOCTL_VERSION, &dv) == 0) {
direct_ipc_dropmaster(session->sock, dev->fd);
}
}
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ioctl(session->tty_fd, VT_RELDISP, 1);
} else {
ioctl(session->tty_fd, VT_RELDISP, VT_ACKACQ);
wl_list_for_each(dev, &session->base.devices, link) {
if (ioctl(dev->fd, DRM_IOCTL_VERSION, &dv) == 0) {
direct_ipc_setmaster(session->sock, dev->fd);
}
}
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session->base.active = true;
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wlr_signal_emit_safe(&session->base.session_signal, session);
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}
return 1;
}
static bool setup_tty(struct direct_session *session, struct wl_display *display) {
int fd = -1, tty = -1, tty0_fd = -1, old_tty = 1;
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if ((tty0_fd = open("/dev/ttyv0", O_RDWR | O_CLOEXEC)) < 0) {
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wlr_log_errno(WLR_ERROR, "Could not open /dev/ttyv0 to find a free vt");
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goto error;
}
if (ioctl(tty0_fd, VT_GETACTIVE, &old_tty) != 0) {
wlr_log_errno(WLR_ERROR, "Could not get active vt");
goto error;
}
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if (ioctl(tty0_fd, VT_OPENQRY, &tty) != 0) {
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wlr_log_errno(WLR_ERROR, "Could not find a free vt");
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goto error;
}
close(tty0_fd);
char tty_path[64];
snprintf(tty_path, sizeof(tty_path), "/dev/ttyv%d", tty - 1);
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wlr_log(WLR_INFO, "Using tty %s", tty_path);
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fd = open(tty_path, O_RDWR | O_NOCTTY | O_CLOEXEC);
if (fd == -1) {
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wlr_log_errno(WLR_ERROR, "Cannot open tty");
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return false;
}
ioctl(fd, VT_ACTIVATE, tty);
ioctl(fd, VT_WAITACTIVE, tty);
int old_kbmode;
if (ioctl(fd, KDGKBMODE, &old_kbmode)) {
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wlr_log_errno(WLR_ERROR, "Failed to read tty %d keyboard mode", tty);
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goto error;
}
if (ioctl(fd, KDSKBMODE, K_CODE)) {
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wlr_log_errno(WLR_ERROR,
"Failed to set keyboard mode K_CODE on tty %d", tty);
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goto error;
}
if (ioctl(fd, KDSETMODE, KD_GRAPHICS)) {
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wlr_log_errno(WLR_ERROR, "Failed to set graphics mode on tty %d", tty);
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goto error;
}
struct vt_mode mode = {
.mode = VT_PROCESS,
.relsig = SIGUSR2,
.acqsig = SIGUSR2,
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.frsig = SIGIO, // has to be set
};
if (ioctl(fd, VT_SETMODE, &mode) < 0) {
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wlr_log(WLR_ERROR, "Failed to take control of tty %d", tty);
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goto error;
}
struct wl_event_loop *loop = wl_display_get_event_loop(display);
session->vt_source = wl_event_loop_add_signal(loop, SIGUSR2,
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vt_handler, session);
if (!session->vt_source) {
goto error;
}
session->base.vtnr = tty;
session->tty_fd = fd;
session->old_tty = old_tty;
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session->old_kbmode = old_kbmode;
return true;
error:
// In case we could not get the last active one, drop back to tty 1,
// better than hanging in a useless blank console. Otherwise activate the
// last active.
ioctl(fd, VT_ACTIVATE, old_tty);
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close(fd);
return false;
}
static struct wlr_session *direct_session_create(struct wl_display *disp) {
struct direct_session *session = calloc(1, sizeof(*session));
if (!session) {
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wlr_log_errno(WLR_ERROR, "Allocation failed");
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return NULL;
}
session->sock = direct_ipc_init(&session->child);
if (session->sock == -1) {
goto error_session;
}
if (!setup_tty(session, disp)) {
goto error_ipc;
}
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wlr_log(WLR_INFO, "Successfully loaded direct session");
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snprintf(session->base.seat, sizeof(session->base.seat), "seat0");
session->base.impl = &session_direct;
return &session->base;
error_ipc:
direct_ipc_finish(session->sock, session->child);
close(session->sock);
error_session:
free(session);
return NULL;
}
const struct session_impl session_direct = {
.create = direct_session_create,
.destroy = direct_session_destroy,
.open = direct_session_open,
.close = direct_session_close,
.change_vt = direct_change_vt,
};