src/system/libroot/posix/sys/uio.c

   1 /*
   2 ** Copyright 2004, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
   3 ** Distributed under the terms of the Haiku License.
   4 */
   5
   6
   7 #include <syscalls.h>
   8
   9 #include <sys/uio.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 ssize_t
  24 readv(int fd, const struct iovec *vecs, size_t count)
  25 {
  26         ssize_t bytes = _kern_readv(fd, -1, vecs, count);
  27
  28         RETURN_AND_SET_ERRNO(bytes);
  29 }
  30
  31
  32 ssize_t
  33 readv_pos(int fd, off_t pos, const struct iovec *vecs, size_t count)
  34 {
  35         ssize_t bytes;
  36         if (pos < 0) {
  37                 __set_errno(B_BAD_VALUE);
  38                 return -1;
  39         }
  40         bytes = _kern_readv(fd, pos, vecs, count);
  41
  42         RETURN_AND_SET_ERRNO(bytes);
  43 }
  44
  45
  46 ssize_t
  47 writev(int fd, const struct iovec *vecs, size_t count)
  48 {
  49         ssize_t bytes = _kern_writev(fd, -1, vecs, count);
  50
  51         RETURN_AND_SET_ERRNO(bytes);
  52 }
  53
  54
  55 ssize_t
  56 writev_pos(int fd, off_t pos, const struct iovec *vecs, size_t count)
  57 {
  58         ssize_t bytes;
  59         if (pos < 0) {
  60                 __set_errno(B_BAD_VALUE);
  61                 return -1;
  62         }
  63         bytes = _kern_writev(fd, pos, vecs, count);
  64
  65         RETURN_AND_SET_ERRNO(bytes);
  66 }
  67