60 lines
1.4 KiB
C
60 lines
1.4 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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#if defined(__NetBSD__)
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#include <stdlib.h>
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#include <sys/stat.h>
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#endif
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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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#define STRLEN(s) ((sizeof(s) / sizeof(s[0])) - 1)
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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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#if defined(__linux__)
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int path_is_drm(const char *path) {
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static const char prefix[] = "/dev/dri/";
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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 dev_is_drm(dev_t device) {
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return major(device) == 226;
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}
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#elif defined(__FreeBSD__)
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int path_is_drm(const char *path) {
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static const char prefix[] = "/dev/drm/";
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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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#elif defined(__NetBSD__)
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int path_is_drm(const char *path) {
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static const char prefix[] = "/dev/dri/";
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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 dev_is_drm(dev_t device) {
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return major(device) == getdevmajor("drm", S_IFCHR);
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}
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#else
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#error Unsupported platform
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#endif
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