1 /* vi: set sw=4 ts=4: */
5 * Copyright (C) tons of folks. Tracking down who wrote what
6 * isn't something I'm going to worry about... If you wrote something
7 * here, please feel free to acknowledge your work.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 * Based in part on code from sash, Copyright (c) 1999 by David I. Bell
24 * Permission has been granted to redistribute this code under the GPL.
32 /* Copy CHUNKSIZE bytes (or until EOF if CHUNKSIZE equals -1) from SRC_FILE
34 extern int copy_file_chunk(FILE *src_file, FILE *dst_file, unsigned long long chunksize)
36 size_t nread, nwritten, size;
39 while (chunksize != 0) {
40 if (chunksize > BUFSIZ)
45 nread = fread (buffer, 1, size, src_file);
47 if (nread != size && ferror (src_file)) {
50 } else if (nread == 0) {
51 if (chunksize != -1) {
52 error_msg ("Unable to read all data");
59 nwritten = fwrite (buffer, 1, nread, dst_file);
61 if (nwritten != nread) {
62 if (ferror (dst_file))
65 error_msg ("Unable to write all data");
70 chunksize -= nwritten;