src/gbm/main/common.c

   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@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 }