libc/sysdeps/linux/common/posix_fallocate64.c

   1 /*
   2  * posix_fallocate() for uClibc
   3  * http://www.opengroup.org/onlinepubs/9699919799/functions/posix_fallocate.html
   4  *
   5  * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
   6  *
   7  * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
   8  */
   9
  10 #include <sys/syscall.h>
  11 #include <fcntl.h>
  12 #include <bits/kernel-features.h>
  13 #include <stdint.h>
  14 #include <errno.h>
  15
  16 #if defined __NR_fallocate
  17 # if __WORDSIZE == 64
  18 /* Can use normal posix_fallocate() */
  19 # elif __WORDSIZE == 32
  20 extern __typeof(fallocate64) __libc_fallocate64 attribute_hidden;
  21 int posix_fallocate64(int fd, __off64_t offset, __off64_t len)
  22 {
  23         if (__libc_fallocate64(fd, 0, offset, len))
  24                 return errno;
  25         return 0;
  26 }
  27 # else
  28 #  error your machine is neither 32 bit or 64 bit ... it must be magical
  29 # endif
  30 #endif