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#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#if defined(__linux__)
#include <sys/sysmacros.h>
#endif
#include "drm.h"
// From libdrm
#define DRM_IOCTL_BASE 'd'
#define DRM_IO(nr) _IO(DRM_IOCTL_BASE, nr)
#define DRM_IOCTL_SET_MASTER DRM_IO(0x1e)
#define DRM_IOCTL_DROP_MASTER DRM_IO(0x1f)
#define STRLEN(s) ((sizeof(s) / sizeof(s[0])) - 1)
int drm_set_master(int fd) {
return ioctl(fd, DRM_IOCTL_SET_MASTER, 0);
}
int drm_drop_master(int fd) {
return ioctl(fd, DRM_IOCTL_DROP_MASTER, 0);
}
#if defined(__linux__)
int path_is_drm(const char *path) {
static const char prefix[] = "/dev/dri/";
static const int prefixlen = STRLEN(prefix);
return strncmp(prefix, path, prefixlen) == 0;
}
int dev_is_drm(dev_t device) {
return major(device) == 226;
}
#elif defined(__FreeBSD__)
int path_is_drm(const char *path) {
static const char prefix[] = "/dev/drm/";
static const int prefixlen = STRLEN(prefix);
return strncmp(prefix, path, prefixlen) == 0;
}
#else
#error Unsupported platform
#endif
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