Add drmGetDeviceNameFromFd function
Determines the /dev filename of the drm fd argument.
diff --git a/tests/Makefile.am b/tests/Makefile.am
index d044474..4e4882a 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -40,6 +40,7 @@
getstats \
setversion \
updatedraw \
+ name_from_fd \
$(NULL)
if HAVE_INTEL
diff --git a/tests/name_from_fd.c b/tests/name_from_fd.c
new file mode 100644
index 0000000..330c8ff
--- /dev/null
+++ b/tests/name_from_fd.c
@@ -0,0 +1,58 @@
+/*
+ * Copyright © 2009 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ * Kristian Høgsberg <krh@bitplanet.net>
+ *
+ */
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <limits.h>
+#include "drmtest.h"
+
+/**
+ * Checks drmGetDeviceNameFromFd
+ *
+ * This tests that we can get the actual version out, and that setting invalid
+ * major/minor numbers fails appropriately. It does not check the actual
+ * behavior differenses resulting from an increased DI version.
+ */
+int main(int argc, char **argv)
+{
+ int fd, ret;
+ drm_set_version_t sv, version;
+ const char *name = "/dev/dri/card0";
+ char *v;
+
+ fd = open("/dev/dri/card0", O_RDWR);
+ if (fd == -1)
+ return 0;
+
+ v = drmGetDeviceNameFromFd(fd);
+ close(fd);
+
+ assert(strcmp(name, v) == 0);
+ drmFree(v);
+
+ return 0;
+}
diff --git a/xf86drm.c b/xf86drm.c
index 26dd812..364fe17 100644
--- a/xf86drm.c
+++ b/xf86drm.c
@@ -2510,3 +2510,29 @@
ret = ioctl(fd, DRM_IOCTL_DROP_MASTER, 0);
return ret;
}
+
+char *drmGetDeviceNameFromFd(int fd)
+{
+ char name[128];
+ struct stat sbuf;
+ dev_t d;
+ int i;
+
+ /* The whole drmOpen thing is a fiasco and we need to find a way
+ * back to just using open(2). For now, however, lets just make
+ * things worse with even more ad hoc directory walking code to
+ * discover the device file name. */
+
+ fstat(fd, &sbuf);
+ d = sbuf.st_rdev;
+
+ for (i = 0; i < DRM_MAX_MINOR; i++) {
+ snprintf(name, sizeof name, DRM_DEV_NAME, DRM_DIR_NAME, i);
+ if (stat(name, &sbuf) == 0 && sbuf.st_rdev == d)
+ break;
+ }
+ if (i == DRM_MAX_MINOR)
+ return NULL;
+
+ return drmStrdup(name);
+}
diff --git a/xf86drm.h b/xf86drm.h
index cf7d132..f0dfb88 100644
--- a/xf86drm.h
+++ b/xf86drm.h
@@ -708,4 +708,6 @@
extern int drmHandleEvent(int fd, drmEventContextPtr evctx);
+extern char *drmGetDeviceNameFromFd(int fd);
+
#endif