src/libsystemd/sd-device/test-sd-device-thread.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <errno.h>
   4 #include <pthread.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7
   8 #include "sd-device.h"
   9
  10 #include "device-util.h"
  11
  12 #define handle_error_errno(error, msg)                          \
  13         ({                                                      \
  14                 errno = abs(error);                             \
  15                 perror(msg);                                    \
  16                 EXIT_FAILURE;                                   \
  17         })
  18
  19 static void* thread(void *p) {
  20         sd_device **d = p;
  21
  22         *d = sd_device_unref(*d);
  23
  24         return NULL;
  25 }
  26
  27 int main(int argc, char *argv[]) {
  28         sd_device *loopback;
  29         pthread_t t;
  30         int r;
  31
  32         r = sd_device_new_from_syspath(&loopback, "/sys/class/net/lo");
  33         if (r < 0)
  34                 return handle_error_errno(r, "Failed to create loopback device object");
  35
  36         FOREACH_DEVICE_PROPERTY(loopback, key, value)
  37                 printf("%s=%s\n", key, value);
  38
  39         r = pthread_create(&t, NULL, thread, &loopback);
  40         if (r != 0)
  41                 return handle_error_errno(r, "Failed to create thread");
  42
  43         r = pthread_join(t, NULL);
  44         if (r != 0)
  45                 return handle_error_errno(r, "Failed to wait thread finished");
  46
  47         if (loopback)
  48                 return handle_error_errno(r, "loopback device is not unref()ed");
  49
  50         return 0;
  51 }