aboutsummaryrefslogtreecommitdiff
path: root/dd.c
diff options
context:
space:
mode:
Diffstat (limited to 'dd.c')
-rw-r--r--dd.c47
1 files changed, 33 insertions, 14 deletions
diff --git a/dd.c b/dd.c
index 1cf731664..33c45940e 100644
--- a/dd.c
+++ b/dd.c
@@ -1,30 +1,48 @@
1/* 1/*
2 * Mini dd implementation for busybox
3 *
4 * Copyright (C) 1999 by Lineo, inc.
5 * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
6 * based in part on code taken from sash.
7 *
2 * Copyright (c) 1999 by David I. Bell 8 * Copyright (c) 1999 by David I. Bell
3 * Permission is granted to use, distribute, or modify this source, 9 * Permission is granted to use, distribute, or modify this source,
4 * provided that this copyright notice remains intact. 10 * provided that this copyright notice remains intact.
5 * 11 *
6 * The "dd" command, originally taken from sash.
7 *
8 * Permission to distribute this code under the GPL has been granted. 12 * Permission to distribute this code under the GPL has been granted.
9 * Mostly rewritten and bugs fixed for busybox by Erik Andersen <andersee@debian.org> 13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 * General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 *
10 */ 28 */
11 29
30
12#include "internal.h" 31#include "internal.h"
13#include <stdio.h> 32#include <stdio.h>
14#include <fcntl.h> 33#include <fcntl.h>
15#include <errno.h> 34#include <errno.h>
16 35
17static const char dd_usage[] = 36static const char dd_usage[] =
18 "Copy a file, converting and formatting according to options\n\ 37"dd [if=name] [of=name] [bs=n] [count=n]\n"
19\n\ 38"Copy a file, converting and formatting according to options\n\n"
20usage: [if=name] [of=name] [bs=n] [count=n]\n\ 39"\tif=FILE\tread from FILE instead of stdin\n"
21\tif=FILE\tread from FILE instead of stdin\n\ 40"\tof=FILE\twrite to FILE instead of stout\n"
22\tof=FILE\twrite to FILE instead of stout\n\ 41"\tbs=n\tread and write N BYTES at a time\n"
23\tbs=n\tread and write N BYTES at a time\n\ 42"\tcount=n\tcopy only n input blocks\n"
24\tcount=n\tcopy only n input blocks\n\ 43//"\tskip=n\tskip n input blocks\n"
25\tskip=n\tskip n input blocks\n\ 44"\n"
26\n\ 45"BYTES may be suffixed: by k for x1024, b for x512, and w for x2.\n";
27BYTES may be suffixed: by k for x1024, b for x512, and w for x2.\n";
28 46
29 47
30 48
@@ -118,6 +136,7 @@ extern int dd_main (int argc, char **argv)
118 goto usage; 136 goto usage;
119 } 137 }
120 } 138 }
139#if 0
121 else if (strncmp(*argv, "skip", 4) == 0) { 140 else if (strncmp(*argv, "skip", 4) == 0) {
122 skipBlocks = atoi( *argv); 141 skipBlocks = atoi( *argv);
123 if (skipBlocks <= 0) { 142 if (skipBlocks <= 0) {
@@ -126,8 +145,8 @@ extern int dd_main (int argc, char **argv)
126 } 145 }
127 146
128 } 147 }
148#endif
129 else { 149 else {
130 fprintf (stderr, "Got here. argv=%s\n", *argv);
131 goto usage; 150 goto usage;
132 } 151 }
133 argc--; 152 argc--;