1 /* vi: set sw=4 ts=4: */
5 * Copyright (C) many different people. If you wrote this, please
6 * acknowledge your work.
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 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
28 /* Copy CHUNKSIZE bytes (or until EOF if CHUNKSIZE equals -1) from SRC_FILE
30 extern int copy_file_chunk(FILE *src_file, FILE *dst_file, unsigned long long chunksize)
32 size_t nread, nwritten, size;
35 while (chunksize != 0) {
36 if (chunksize > BUFSIZ)
41 nread = fread (buffer, 1, size, src_file);
43 if (nread != size && ferror (src_file)) {
46 } else if (nread == 0) {
47 if (chunksize != -1) {
48 error_msg ("Unable to read all data");
55 nwritten = fwrite (buffer, 1, nread, dst_file);
57 if (nwritten != nread) {
58 if (ferror (dst_file))
61 error_msg ("Unable to write all data");
66 chunksize -= nwritten;