blob: e9663c3542e5e12bf24cfe7e7adaddff7d6df3cd [file] [log] [blame]
Eric Andersenaad1a882001-03-16 22:47:14 +00001/* vi: set sw=4 ts=4: */
2/*
3 * Utility routines.
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.
8 *
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.
13 *
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.
18 *
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
22 *
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.
25 *
26 */
27
28#include <stdio.h>
29#include <sys/stat.h>
30#include "libbb.h"
31
32/*
33 * Copy chunksize bytes between two file descriptors
Glenn L McGrathc9cac5b2001-04-12 13:47:12 +000034 *
35 * unsigned long is used so that if -1 is passed as chunksize it will read as
36 * much as possible, and it will work with off_t or off64_t
Eric Andersenaad1a882001-03-16 22:47:14 +000037 */
Glenn L McGrathc9cac5b2001-04-12 13:47:12 +000038extern int copy_file_chunk(FILE *src_file, FILE *dst_file, unsigned long long chunksize)
Eric Andersenaad1a882001-03-16 22:47:14 +000039{
Glenn L McGrath4949faf2001-04-11 16:23:35 +000040 off_t size, amount_written;
41 char buffer[BUFSIZ]; /* BUFSIZ is declared in stdio.h */
42
Glenn L McGrath4949faf2001-04-11 16:23:35 +000043 while (chunksize > 0) {
44 if (chunksize > BUFSIZ) {
45 size = BUFSIZ;
46 } else {
47 size = chunksize;
48 }
49 amount_written = fwrite(buffer, 1, fread(buffer, 1, size, src_file), dst_file);
50 if (amount_written != size) {
51 error_msg("Couldnt write correct amount");
52 return(FALSE);
53 }
54 chunksize -= amount_written;
55 }
56 return (TRUE);
Eric Andersenaad1a882001-03-16 22:47:14 +000057}
58
Eric Andersenaad1a882001-03-16 22:47:14 +000059/* END CODE */
60/*
61Local Variables:
62c-file-style: "linux"
63c-basic-offset: 4
64tab-width: 4
65End:
66*/