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authorsghctoma <sghctoma@gmail.com>2018-09-07 16:37:25 +0200
committersghctoma <sghctoma@gmail.com>2018-09-07 16:37:25 +0200
commit7a5d3c4d3bf8c2f21fcec65182f1563f4c857408 (patch)
tree4fd3777452ffeb1e31c9c372725dff059d7bfa94 /backend
parentbbeed1bd3179a082b5bfb04010e6c476e75e4320 (diff)
Implement device type discovery using ioctl calls
This commit implements device type discovery by calling two ioctls (DRM_IOCTL_VERSION and EVIOCGVERSION) on the device. These iocts are specific to drm and input devices respectively, therefore we can determine the device type based on which one returns an error.
Diffstat (limited to 'backend')
-rw-r--r--backend/session/direct-freebsd.c34
-rw-r--r--backend/session/direct-ipc.c10
2 files changed, 15 insertions, 29 deletions
diff --git a/backend/session/direct-freebsd.c b/backend/session/direct-freebsd.c
index 7784296b..cecfb0c1 100644
--- a/backend/session/direct-freebsd.c
+++ b/backend/session/direct-freebsd.c
@@ -15,6 +15,7 @@
#include <wayland-server.h>
#include <wlr/backend/session/interface.h>
#include <wlr/util/log.h>
+#include <xf86drm.h>
#include "backend/session/direct-ipc.h"
#include "util/signal.h"
@@ -47,24 +48,11 @@ static int direct_session_open(struct wlr_session *base, const char *path) {
static void direct_session_close(struct wlr_session *base, int fd) {
struct direct_session *session = wl_container_of(base, session, base);
- struct stat st;
- if (fstat(fd, &st) < 0) {
- wlr_log_errno(WLR_ERROR, "Stat failed");
- close(fd);
- return;
- }
-
- char *name;
- name = devname(st.st_rdev, S_IFCHR);
- if (name == NULL) {
- wlr_log_errno(WLR_ERROR, "Failed to get device name");
- close(fd);
- return;
- }
-
- if (strncmp(name, "drm/", 4) == 0) {
+ int ev;
+ struct drm_version dv = {0};
+ if (ioctl(fd, DRM_IOCTL_VERSION, &dv) == 0) {
direct_ipc_dropmaster(session->sock, fd);
- } else if (strncmp(name, "input/event", 11)) {
+ } else if (ioctl(fd, EVIOCGVERSION, &ev) == 0) {
ioctl(fd, EVIOCREVOKE, 0);
}
@@ -104,16 +92,15 @@ static void direct_session_destroy(struct wlr_session *base) {
static int vt_handler(int signo, void *data) {
struct direct_session *session = data;
+ struct drm_version dv = {0};
+ struct wlr_device *dev;
if (session->base.active) {
session->base.active = false;
wlr_signal_emit_safe(&session->base.session_signal, session);
- char *name;
- struct wlr_device *dev;
wl_list_for_each(dev, &session->base.devices, link) {
- name = devname(dev->dev, S_IFCHR);
- if (name != NULL && strncmp(name, "drm/", 4) == 0) {
+ if (ioctl(dev->fd, DRM_IOCTL_VERSION, &dv) == 0) {
direct_ipc_dropmaster(session->sock, dev->fd);
}
}
@@ -122,11 +109,8 @@ static int vt_handler(int signo, void *data) {
} else {
ioctl(session->tty_fd, VT_RELDISP, VT_ACKACQ);
- char *name;
- struct wlr_device *dev;
wl_list_for_each(dev, &session->base.devices, link) {
- name = devname(dev->dev, S_IFCHR);
- if (name != NULL && strncmp(name, "drm/", 4) == 0) {
+ if (ioctl(dev->fd, DRM_IOCTL_VERSION, &dv) == 0) {
direct_ipc_setmaster(session->sock, dev->fd);
}
}
diff --git a/backend/session/direct-ipc.c b/backend/session/direct-ipc.c
index 99ffcb1b..302b639e 100644
--- a/backend/session/direct-ipc.c
+++ b/backend/session/direct-ipc.c
@@ -3,6 +3,7 @@
#define __BSD_VISIBLE 1
#define INPUT_MAJOR 0
#endif
+#include <dev/evdev/input.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
@@ -159,14 +160,15 @@ static void communicate(int sock) {
ret = errno;
}
#else
- if (strncmp(msg.path, "/dev/drm/", 9) &&
- strncmp(msg.path, "/dev/input/event", 16)) {
-
+ int ev;
+ struct drm_version dv = {0};
+ if (ioctl(fd, EVIOCGVERSION, &ev) == -1 &&
+ ioctl(fd, DRM_IOCTL_VERSION, &dv) == -1) {
ret = ENOTSUP;
goto error;
}
- if (strncmp(msg.path, "/dev/drm/", 9) == 0 && drmSetMaster(fd)) {
+ if (dv.version_major != 0 && drmSetMaster(fd)) {
ret = errno;
}
#endif