e129536a08
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.
46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
#include <string.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#if defined(__linux__)
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#include <sys/sysmacros.h>
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#endif
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#include "compiler.h"
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#include "drm.h"
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// From libdrm
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#define DRM_IOCTL_BASE 'd'
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#define DRM_IO(nr) _IO(DRM_IOCTL_BASE, nr)
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#define DRM_IOCTL_SET_MASTER DRM_IO(0x1e)
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#define DRM_IOCTL_DROP_MASTER DRM_IO(0x1f)
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int drm_set_master(int fd) {
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return ioctl(fd, DRM_IOCTL_SET_MASTER, 0);
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}
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int drm_drop_master(int fd) {
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return ioctl(fd, DRM_IOCTL_DROP_MASTER, 0);
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}
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static int path_is_drm_card(const char *path) {
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static const char prefix[] = "/dev/dri/card";
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static const int prefixlen = STRLEN(prefix);
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return strncmp(prefix, path, prefixlen) == 0;
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}
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static int path_is_drm_render(const char *path) {
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static const char prefix[] = "/dev/dri/renderD";
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static const int prefixlen = STRLEN(prefix);
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return strncmp(prefix, path, prefixlen) == 0;
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}
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int path_is_drm(const char *path) {
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return path_is_drm_card(path) || path_is_drm_render(path);
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}
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#if defined(__linux__)
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int dev_is_drm(dev_t device) {
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return major(device) == 226;
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}
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#endif
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