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authorEric Andersen <andersen@codepoet.org>2001-10-24 05:00:29 +0000
committerEric Andersen <andersen@codepoet.org>2001-10-24 05:00:29 +0000
commitbdfd0d78bc44e73d693510e70087857785b3b521 (patch)
tree153a573095afac8d8d0ea857759ecabd77fb28b7 /dd.c
parent9260fc5552a3ee52eb95823aa6689d52a1ffd33c (diff)
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Major rework of the directory structure and the entire build system.
-Erik
Diffstat (limited to 'dd.c')
-rw-r--r--dd.c154
1 files changed, 0 insertions, 154 deletions
diff --git a/dd.c b/dd.c
deleted file mode 100644
index d46db82a0..000000000
--- a/dd.c
+++ /dev/null
@@ -1,154 +0,0 @@
1/* vi: set sw=4 ts=4: */
2/*
3 * Mini dd implementation for busybox
4 *
5 *
6 * Copyright (C) 2000 by Matt Kraai <kraai@alumni.carnegiemellon.edu>
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 2 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 GNU
16 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 */
23
24#include <sys/types.h>
25#include <stdlib.h>
26#include <stdio.h>
27#include <unistd.h>
28#include <string.h>
29#include <fcntl.h>
30#include "busybox.h"
31
32
33static const struct suffix_mult dd_suffixes[] = {
34 { "c", 1 },
35 { "w", 2 },
36 { "b", 512 },
37 { "kD", 1000 },
38 { "k", 1024 },
39 { "MD", 1000000 },
40 { "M", 1048576 },
41 { "GD", 1000000000 },
42 { "G", 1073741824 },
43 { NULL, 0 }
44};
45
46int dd_main(int argc, char **argv)
47{
48 int i, ifd, ofd, oflag, sync_flag = FALSE, trunc = TRUE;
49 size_t in_full = 0, in_part = 0, out_full = 0, out_part = 0;
50 size_t bs = 512, count = -1;
51 ssize_t n;
52 off_t seek = 0, skip = 0;
53 char *infile = NULL, *outfile = NULL, *buf;
54
55 for (i = 1; i < argc; i++) {
56 if (strncmp("bs=", argv[i], 3) == 0)
57 bs = parse_number(argv[i]+3, dd_suffixes);
58 else if (strncmp("count=", argv[i], 6) == 0)
59 count = parse_number(argv[i]+6, dd_suffixes);
60 else if (strncmp("seek=", argv[i], 5) == 0)
61 seek = parse_number(argv[i]+5, dd_suffixes);
62 else if (strncmp("skip=", argv[i], 5) == 0)
63 skip = parse_number(argv[i]+5, dd_suffixes);
64 else if (strncmp("if=", argv[i], 3) == 0)
65 infile = argv[i]+3;
66 else if (strncmp("of=", argv[i], 3) == 0)
67 outfile = argv[i]+3;
68 else if (strncmp("conv=", argv[i], 5) == 0) {
69 buf = argv[i]+5;
70 while (1) {
71 if (strncmp("notrunc", buf, 7) == 0) {
72 trunc = FALSE;
73 buf += 7;
74 } else if (strncmp("sync", buf, 4) == 0) {
75 sync_flag = TRUE;
76 buf += 4;
77 } else {
78 error_msg_and_die("invalid conversion `%s'", argv[i]+5);
79 }
80 if (buf[0] == '\0')
81 break;
82 if (buf[0] == ',')
83 buf++;
84 }
85 } else
86 show_usage();
87 }
88
89 buf = xmalloc(bs);
90
91 if (infile != NULL) {
92 if ((ifd = open(infile, O_RDONLY)) < 0)
93 perror_msg_and_die("%s", infile);
94 } else {
95 ifd = STDIN_FILENO;
96 infile = "standard input";
97 }
98
99 if (outfile != NULL) {
100 oflag = O_WRONLY | O_CREAT;
101
102 if (!seek && trunc)
103 oflag |= O_TRUNC;
104
105 if ((ofd = open(outfile, oflag, 0666)) < 0)
106 perror_msg_and_die("%s", outfile);
107
108 if (seek && trunc) {
109 if (ftruncate(ofd, seek * bs) < 0)
110 perror_msg_and_die("%s", outfile);
111 }
112 } else {
113 ofd = STDOUT_FILENO;
114 outfile = "standard output";
115 }
116
117 if (skip) {
118 if (lseek(ifd, skip * bs, SEEK_CUR) < 0)
119 perror_msg_and_die("%s", infile);
120 }
121
122 if (seek) {
123 if (lseek(ofd, seek * bs, SEEK_CUR) < 0)
124 perror_msg_and_die("%s", outfile);
125 }
126
127 while (in_full + in_part != count) {
128 n = safe_read(ifd, buf, bs);
129 if (n < 0)
130 perror_msg_and_die("%s", infile);
131 if (n == 0)
132 break;
133 if (n == bs)
134 in_full++;
135 else
136 in_part++;
137 if (sync_flag) {
138 memset(buf + n, '\0', bs - n);
139 n = bs;
140 }
141 n = full_write(ofd, buf, n);
142 if (n < 0)
143 perror_msg_and_die("%s", outfile);
144 if (n == bs)
145 out_full++;
146 else
147 out_part++;
148 }
149
150 fprintf(stderr, "%ld+%ld records in\n", (long)in_full, (long)in_part);
151 fprintf(stderr, "%ld+%ld records out\n", (long)out_full, (long)out_part);
152
153 return EXIT_SUCCESS;
154}
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