From 7dacbebee2562397ba34427e62413cbb4d2013ba Mon Sep 17 00:00:00 2001
From: Svante Signell <svante.signell@gmail.com>
Date: Mon, 8 Dec 2025 22:24:29 +0100
Subject: [PATCH] Add support for GNU/Hurd

---
 include/drm/drm.h | 15 +++++++++++++++
 xf86drm.c         | 32 ++++++++++++++++----------------
 xf86drm.h         | 10 ++++++++++
 3 files changed, 41 insertions(+), 16 deletions(-)

diff --git a/include/drm/drm.h b/include/drm/drm.h
index 3ddff73d..456af3a5 100644
--- a/include/drm/drm.h
+++ b/include/drm/drm.h
@@ -41,6 +41,21 @@
 #include <asm/ioctl.h>
 typedef unsigned int drm_handle_t;
 
+#elif   defined(__GNU__)
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <mach/i386/ioccom.h>
+typedef __int8_t   __s8;
+typedef __uint8_t  __u8;
+typedef __int16_t  __s16;
+typedef __uint16_t __u16;
+typedef __int32_t  __s32;
+typedef __uint32_t __u32;
+typedef __int64_t  __s64;
+typedef __uint64_t __u64;
+typedef size_t   __kernel_size_t;
+typedef unsigned int drm_handle_t;
+
 #else /* One of the BSDs */
 
 #include <stdint.h>
diff --git a/xf86drm.c b/xf86drm.c
index d4bfec8a..a60aca65 100644
--- a/xf86drm.c
+++ b/xf86drm.c
@@ -101,7 +101,7 @@
 #define DRM_MAJOR 226 /* Linux */
 #endif
 
-#if defined(__OpenBSD__) || defined(__DragonFly__)
+#if defined(__OpenBSD__) || defined(__DragonFly__) || defined(__GNU__)
 struct drm_pciinfo {
 	uint16_t	domain;
 	uint8_t		bus;
@@ -3495,7 +3495,7 @@ static char *drmGetMinorNameForFD(int fd, int type)
     return strdup(name);
 #else
     struct stat sbuf;
-    char buf[PATH_MAX + 1];
+    char *buf = NULL;
     const char *dev_name = drmGetDeviceName(type);
     unsigned int maj, min;
     int n;
@@ -3512,11 +3512,12 @@ static char *drmGetMinorNameForFD(int fd, int type)
     if (!dev_name)
         return NULL;
 
-    n = snprintf(buf, sizeof(buf), dev_name, DRM_DIR_NAME, min);
-    if (n == -1 || n >= sizeof(buf))
+    n = asprintf(&buf, dev_name, DRM_DIR_NAME, min);
+    if (n < 0)
         return NULL;
 
-    return strdup(buf);
+    return buf;
+
 #endif
 }
 
@@ -3636,7 +3637,7 @@ static int drmParseSubsystemType(int maj, int min)
             return DRM_BUS_VIRTIO;
      }
     return subsystem_type;
-#elif defined(__OpenBSD__) || defined(__DragonFly__) || defined(__FreeBSD__)
+#elif defined(__OpenBSD__) || defined(__DragonFly__) || defined(__FreeBSD__) || defined(__GNU__)
     return DRM_BUS_PCI;
 #else
 #warning "Missing implementation of drmParseSubsystemType"
@@ -3744,7 +3745,7 @@ static int drmParsePciBusInfo(int maj, int min, drmPciBusInfoPtr info)
     info->func = func;
 
     return 0;
-#elif defined(__OpenBSD__) || defined(__DragonFly__)
+#elif defined(__OpenBSD__) || defined(__DragonFly__) || defined(__GNU__)
     struct drm_pciinfo pinfo;
     int fd, type;
 
@@ -3915,7 +3916,7 @@ static int drmParsePciDeviceInfo(int maj, int min,
         return parse_config_sysfs_file(maj, min, device);
 
     return 0;
-#elif defined(__OpenBSD__) || defined(__DragonFly__)
+#elif defined(__OpenBSD__) || defined(__DragonFly__) || defined(__GNU__)
     struct drm_pciinfo pinfo;
     int fd, type;
 
@@ -4524,7 +4525,7 @@ process_device(drmDevicePtr *device, const char *d_name,
                bool fetch_deviceinfo, uint32_t flags)
 {
     struct stat sbuf;
-    char node[PATH_MAX + 1];
+    char *node = NULL;
     int node_type, subsystem_type, written;
     unsigned int maj, min;
     const int max_node_length = ALIGN(drmGetMaxNodeName(), sizeof(void *));
@@ -4532,8 +4533,7 @@ process_device(drmDevicePtr *device, const char *d_name,
     node_type = drmGetNodeType(d_name);
     if (node_type < 0)
         return -1;
-
-    written = snprintf(node, PATH_MAX, "%s/%s", DRM_DIR_NAME, d_name);
+    written = asprintf(&node, "%s/%s", DRM_DIR_NAME, d_name);
     if (written < 0)
         return -1;
 
@@ -4940,7 +4940,7 @@ drm_public char *drmGetDeviceNameFromFd2(int fd)
     return drmGetDeviceNameFromFd(fd);
 #else
     struct stat      sbuf;
-    char             node[PATH_MAX + 1];
+    char            *node = NULL;
     const char      *dev_name;
     int              node_type;
     int              maj, min, n;
@@ -4962,11 +4962,11 @@ drm_public char *drmGetDeviceNameFromFd2(int fd)
     if (!dev_name)
         return NULL;
 
-    n = snprintf(node, PATH_MAX, dev_name, DRM_DIR_NAME, min);
-    if (n == -1 || n >= PATH_MAX)
-      return NULL;
+    n = asprintf(&node, dev_name, DRM_DIR_NAME, min);
+    if (n < 0)
+       return NULL;
 
-    return strdup(node);
+    return node;
 #endif
 }
 
diff --git a/xf86drm.h b/xf86drm.h
index b45337a4..59ef2c5c 100644
--- a/xf86drm.h
+++ b/xf86drm.h
@@ -56,6 +56,16 @@ extern "C" {
 #define DRM_IOC_READWRITE	_IOC_READ|_IOC_WRITE
 #define DRM_IOC(dir, group, nr, size) _IOC(dir, group, nr, size)
 
+#elif defined(__GNU__)
+#include <mach/port.h>
+#include <hurd/ioctl.h>
+#define DRM_IOCTL_NR(n)         ((n) & 0xff)
+#define DRM_IOC_VOID            IOC_VOID
+#define DRM_IOC_READ            IOC_OUT
+#define DRM_IOC_WRITE           IOC_IN
+#define DRM_IOC_READWRITE       IOC_INOUT
+#define DRM_IOC(dir, group, nr, size) _IOC(dir, group, nr, size)
+
 #else /* One of the *BSDs */
 
 #include <sys/ioccom.h>