| 1 | /* pread.c -- version of pread for gold. */ |
| 2 | |
| 3 | /* Copyright 2006, 2007, 2009 Free Software Foundation, Inc. |
| 4 | Written by Ian Lance Taylor <iant@google.com>. |
| 5 | |
| 6 | This file is part of gold. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 21 | MA 02110-1301, USA. */ |
| 22 | |
| 23 | /* This file implements pread for systems which don't have it. This |
| 24 | file is only compiled if pread is not present on the system. This |
| 25 | is not an exact version of pread, as it does not preserve the |
| 26 | current file offset. */ |
| 27 | |
| 28 | #include "config.h" |
| 29 | |
| 30 | #include <stdio.h> |
| 31 | #include <sys/types.h> |
| 32 | #include <unistd.h> |
| 33 | |
| 34 | extern ssize_t pread (int, void *, size_t, off_t); |
| 35 | |
| 36 | ssize_t |
| 37 | pread (int fd, void *buf, size_t count, off_t offset) |
| 38 | { |
| 39 | if (lseek(fd, offset, SEEK_SET) != offset) |
| 40 | return -1; |
| 41 | return read(fd, buf, count); |
| 42 | } |