From e129536a08a74045719640676b55a03b926117d9 Mon Sep 17 00:00:00 2001 From: Kenny Levinsen Date: Sat, 1 Aug 2020 03:23:56 +0200 Subject: 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. --- common/drm.c | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-) (limited to 'common/drm.c') 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 #include #include -#ifdef __linux__ +#if defined(__linux__) #include #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 -- cgit v1.2.3