Add drmGetDeviceNameFromFd function

Determines the /dev filename of the drm fd argument.
main
Kristian Høgsberg 2009-11-23 20:51:34 -05:00
parent 500f5b5240
commit 22d4666904
4 changed files with 87 additions and 0 deletions

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@ -40,6 +40,7 @@ TESTS = \
getstats \
setversion \
updatedraw \
name_from_fd \
$(NULL)
if HAVE_INTEL

58
tests/name_from_fd.c Normal file
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@ -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;
}

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@ -2510,3 +2510,29 @@ int drmDropMaster(int fd)
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);
}

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@ -708,4 +708,6 @@ typedef struct _drmEventContext {
extern int drmHandleEvent(int fd, drmEventContextPtr evctx);
extern char *drmGetDeviceNameFromFd(int fd);
#endif