src/system/libroot/posix/unistd/ioctl.c

   1 /*
   2  * Copyright 2002-2007, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
   3  * Distributed under the terms of the MIT License.
   4  */
   5
   6
   7 #include <unistd.h>
   8 #include <syscalls.h>
   9 #include <stdarg.h>
  10 #include <errno.h>
  11
  12 #include <errno_private.h>
  13
  14
  15 #define RETURN_AND_SET_ERRNO(err) \
  16         if (err < 0) { \
  17                 __set_errno(err); \
  18                 return -1; \
  19         } \
  20         return err;
  21
  22
  23 int
  24 ioctl(int fd, ulong cmd, ...)
  25 {
  26         va_list args;
  27         void* argument;
  28         size_t size;
  29         int status;
  30
  31         va_start(args, cmd);
  32         argument = va_arg(args, void*);
  33         size = va_arg(args, size_t);
  34         va_end(args);
  35
  36         status = _kern_ioctl(fd, cmd, argument, size);
  37
  38         RETURN_AND_SET_ERRNO(status)
  39 }