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glibc  2.9
pwrite.c
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00001 /* Copyright (C) 1991, 1995, 1996, 1997, 1999 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <errno.h>
00020 #include <unistd.h>
00021 
00022 /* Write NBYTES of BUF to FD at given position OFFSET without changing
00023    the file position.  Return the number written, or -1.  */
00024 ssize_t
00025 __libc_pwrite (int fd, const void *buf, size_t nbytes, off_t offset)
00026 {
00027   if (nbytes == 0)
00028     return 0;
00029   if (fd < 0)
00030     {
00031       __set_errno (EBADF);
00032       return -1;
00033     }
00034   if (buf == NULL || offset < 0)
00035     {
00036       __set_errno (EINVAL);
00037       return -1;
00038     }
00039 
00040   __set_errno (ENOSYS);
00041   return -1;
00042 }
00043 strong_alias (__libc_pwrite, __pwrite)
00044 weak_alias (__libc_pwrite, pwrite)
00045 stub_warning (pwrite)
00046 #include <stub-tag.h>