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authorKenny Levinsen <kl@kl.wtf>2020-08-01 03:23:56 +0200
committerKenny Levinsen <kl@kl.wtf>2020-08-01 16:53:44 +0200
commite129536a08a74045719640676b55a03b926117d9 (patch)
tree790d460b307479842d16ecb0ab89fbc7eb3a0752 /common/drm.c
parentdc9c7bff71cb843c6ba7b68e977d130ae8098201 (diff)
devices: Use path to check device type
FreeBSD device numbers cannot be used to check the type of a device, as they are merely unique filesystem IDs. As the paths we use have been sanitized with realpath, we can simply use the path to check if a requested file is an evdev or drm device. This also allows us to make the check before the file is opened.
Diffstat (limited to 'common/drm.c')
-rw-r--r--common/drm.c22
1 files changed, 21 insertions, 1 deletions
diff --git a/common/drm.c b/common/drm.c
index 3234e81..684a925 100644
--- a/common/drm.c
+++ b/common/drm.c
@@ -1,10 +1,12 @@
+#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
-#ifdef __linux__
+#if defined(__linux__)
#include <sys/sysmacros.h>
#endif
+#include "compiler.h"
#include "drm.h"
// From libdrm
@@ -21,6 +23,24 @@ int drm_drop_master(int fd) {
return ioctl(fd, DRM_IOCTL_DROP_MASTER, 0);
}
+static int path_is_drm_card(const char *path) {
+ static const char prefix[] = "/dev/dri/card";
+ static const int prefixlen = STRLEN(prefix);
+ return strncmp(prefix, path, prefixlen) == 0;
+}
+
+static int path_is_drm_render(const char *path) {
+ static const char prefix[] = "/dev/dri/renderD";
+ static const int prefixlen = STRLEN(prefix);
+ return strncmp(prefix, path, prefixlen) == 0;
+}
+
+int path_is_drm(const char *path) {
+ return path_is_drm_card(path) || path_is_drm_render(path);
+}
+
+#if defined(__linux__)
int dev_is_drm(dev_t device) {
return major(device) == 226;
}
+#endif