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glibc  2.9
pread64.c
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00001 /* Read block from given position in file without changing file pointer.
00002    Hurd version.
00003    Copyright (C) 2001,02 Free Software Foundation, Inc.
00004    This file is part of the GNU C Library.
00005 
00006    The GNU C Library is free software; you can redistribute it and/or
00007    modify it under the terms of the GNU Lesser General Public
00008    License as published by the Free Software Foundation; either
00009    version 2.1 of the License, or (at your option) any later version.
00010 
00011    The GNU C Library is distributed in the hope that it will be useful,
00012    but WITHOUT ANY WARRANTY; without even the implied warranty of
00013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014    Lesser General Public License for more details.
00015 
00016    You should have received a copy of the GNU Lesser General Public
00017    License along with the GNU C Library; if not, write to the Free
00018    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00019    02111-1307 USA.  */
00020 
00021 #include <errno.h>
00022 #include <unistd.h>
00023 #include <hurd/fd.h>
00024 
00025 ssize_t
00026 __libc_pread64 (int fd, void *buf, size_t nbytes, off64_t offset)
00027 {
00028   error_t err;
00029   if (offset < 0)
00030     err = EINVAL;
00031   else
00032     err = HURD_FD_USE (fd, _hurd_fd_read (descriptor, buf, &nbytes, offset));
00033   return err ? __hurd_dfail (fd, err) : nbytes;
00034 }
00035 
00036 #ifndef __libc_pread64
00037 weak_alias (__libc_pread64, __pread64)
00038 weak_alias (__libc_pread64, pread64)
00039 #endif