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      1 /*
      2  * Copyright  2011 Intel Corporation
      3  *
      4  * Permission is hereby granted, free of charge, to any person obtaining a
      5  * copy of this software and associated documentation files (the "Software"),
      6  * to deal in the Software without restriction, including without limitation
      7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      8  * and/or sell copies of the Software, and to permit persons to whom the
      9  * Software is furnished to do so, subject to the following conditions:
     10  *
     11  * The above copyright notice and this permission notice (including the next
     12  * paragraph) shall be included in all copies or substantial portions of the
     13  * Software.
     14  *
     15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     18  * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
     19  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
     20  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
     22  * DEALINGS IN THE SOFTWARE.
     23  *
     24  * Authors:
     25  *    Benjamin Franzke <benjaminfranzke (at) googlemail.com>
     26  */
     27 
     28 #include <stdio.h>
     29 #include <string.h>
     30 
     31 #include <libudev.h>
     32 #include <sys/types.h>
     33 #include <sys/stat.h>
     34 #include <unistd.h>
     35 
     36 #include "common.h"
     37 #include "gbmint.h"
     38 
     39 GBM_EXPORT struct udev_device *
     40 _gbm_udev_device_new_from_fd(struct udev *udev, int fd)
     41 {
     42    struct udev_device *device;
     43    struct stat buf;
     44 
     45    if (fstat(fd, &buf) < 0) {
     46       fprintf(stderr, "gbm: failed to stat fd %d", fd);
     47       return NULL;
     48    }
     49 
     50    device = udev_device_new_from_devnum(udev, 'c', buf.st_rdev);
     51    if (device == NULL) {
     52       fprintf(stderr,
     53               "gbm: could not create udev device for fd %d", fd);
     54       return NULL;
     55    }
     56 
     57    return device;
     58 }
     59 
     60 GBM_EXPORT char *
     61 _gbm_fd_get_device_name(int fd)
     62 {
     63    struct udev *udev;
     64    struct udev_device *device;
     65    const char *const_device_name;
     66    char *device_name = NULL;
     67 
     68    udev = udev_new();
     69    device = _gbm_udev_device_new_from_fd(udev, fd);
     70    if (device == NULL)
     71       return NULL;
     72 
     73    const_device_name = udev_device_get_devnode(device);
     74    if (!const_device_name)
     75       goto out;
     76    device_name = strdup(const_device_name);
     77 
     78 out:
     79    udev_device_unref(device);
     80    udev_unref(udev);
     81 
     82    return device_name;
     83 }
     84 
     85 GBM_EXPORT void
     86 _gbm_log(const char *fmt_str, ...)
     87 {
     88 }
     89