2 * Copyright (c) 2003-2007 Tim Kientzle
3 * Copyright (c) 2006 Rudolf Marek SYSGO s.r.o.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include "archive_platform.h"
28 __FBSDID("$FreeBSD: head/lib/libarchive/archive_write_set_format_cpio_newc.c 201160 2009-12-29 05:41:57Z kientzle $");
42 #include "archive_entry.h"
43 #include "archive_private.h"
44 #include "archive_write_private.h"
46 static ssize_t archive_write_newc_data(struct archive_write *,
47 const void *buff, size_t s);
48 static int archive_write_newc_finish(struct archive_write *);
49 static int archive_write_newc_destroy(struct archive_write *);
50 static int archive_write_newc_finish_entry(struct archive_write *);
51 static int archive_write_newc_header(struct archive_write *,
52 struct archive_entry *);
53 static int format_hex(int64_t, void *, int);
54 static int64_t format_hex_recursive(int64_t, char *, int);
57 uint64_t entry_bytes_remaining;
61 struct cpio_header_newc {
78 /* Logic trick: difference between 'n' and next multiple of 4 */
79 #define PAD4(n) (3 & (1 + ~(n)))
82 * Set output format to 'cpio' format.
85 archive_write_set_format_cpio_newc(struct archive *_a)
87 struct archive_write *a = (struct archive_write *)_a;
90 /* If someone else was already registered, unregister them. */
91 if (a->format_destroy != NULL)
92 (a->format_destroy)(a);
94 cpio = (struct cpio *)malloc(sizeof(*cpio));
96 archive_set_error(&a->archive, ENOMEM, "Can't allocate cpio data");
97 return (ARCHIVE_FATAL);
99 memset(cpio, 0, sizeof(*cpio));
100 a->format_data = cpio;
102 a->pad_uncompressed = 1;
103 a->format_name = "cpio";
104 a->format_write_header = archive_write_newc_header;
105 a->format_write_data = archive_write_newc_data;
106 a->format_finish_entry = archive_write_newc_finish_entry;
107 a->format_finish = archive_write_newc_finish;
108 a->format_destroy = archive_write_newc_destroy;
109 a->archive.archive_format = ARCHIVE_FORMAT_CPIO_SVR4_NOCRC;
110 a->archive.archive_format_name = "SVR4 cpio nocrc";
115 archive_write_newc_header(struct archive_write *a, struct archive_entry *entry)
119 const char *p, *path;
120 int pathlength, ret, ret2;
121 struct cpio_header_newc h;
124 cpio = (struct cpio *)a->format_data;
127 path = archive_entry_pathname(entry);
128 pathlength = (int)strlen(path) + 1; /* Include trailing null. */
130 memset(&h, 0, sizeof(h));
131 format_hex(0x070701, &h.c_magic, sizeof(h.c_magic));
132 format_hex(archive_entry_devmajor(entry), &h.c_devmajor,
133 sizeof(h.c_devmajor));
134 format_hex(archive_entry_devminor(entry), &h.c_devminor,
135 sizeof(h.c_devminor));
137 ino = archive_entry_ino64(entry);
138 if (ino > 0xffffffff) {
139 archive_set_error(&a->archive, ERANGE,
140 "large inode number truncated");
144 format_hex(ino & 0xffffffff, &h.c_ino, sizeof(h.c_ino));
145 format_hex(archive_entry_mode(entry), &h.c_mode, sizeof(h.c_mode));
146 format_hex(archive_entry_uid(entry), &h.c_uid, sizeof(h.c_uid));
147 format_hex(archive_entry_gid(entry), &h.c_gid, sizeof(h.c_gid));
148 format_hex(archive_entry_nlink(entry), &h.c_nlink, sizeof(h.c_nlink));
149 if (archive_entry_filetype(entry) == AE_IFBLK
150 || archive_entry_filetype(entry) == AE_IFCHR) {
151 format_hex(archive_entry_rdevmajor(entry), &h.c_rdevmajor, sizeof(h.c_rdevmajor));
152 format_hex(archive_entry_rdevminor(entry), &h.c_rdevminor, sizeof(h.c_rdevminor));
154 format_hex(0, &h.c_rdevmajor, sizeof(h.c_rdevmajor));
155 format_hex(0, &h.c_rdevminor, sizeof(h.c_rdevminor));
157 format_hex(archive_entry_mtime(entry), &h.c_mtime, sizeof(h.c_mtime));
158 format_hex(pathlength, &h.c_namesize, sizeof(h.c_namesize));
159 format_hex(0, &h.c_checksum, sizeof(h.c_checksum));
161 /* Non-regular files don't store bodies. */
162 if (archive_entry_filetype(entry) != AE_IFREG)
163 archive_entry_set_size(entry, 0);
165 /* Symlinks get the link written as the body of the entry. */
166 p = archive_entry_symlink(entry);
167 if (p != NULL && *p != '\0')
168 format_hex(strlen(p), &h.c_filesize, sizeof(h.c_filesize));
170 format_hex(archive_entry_size(entry),
171 &h.c_filesize, sizeof(h.c_filesize));
173 ret = (a->compressor.write)(a, &h, sizeof(h));
174 if (ret != ARCHIVE_OK)
175 return (ARCHIVE_FATAL);
177 /* Pad pathname to even length. */
178 ret = (a->compressor.write)(a, path, pathlength);
179 if (ret != ARCHIVE_OK)
180 return (ARCHIVE_FATAL);
181 pad = PAD4(pathlength + sizeof(struct cpio_header_newc));
183 ret = (a->compressor.write)(a, "\0\0\0", pad);
184 if (ret != ARCHIVE_OK)
185 return (ARCHIVE_FATAL);
187 cpio->entry_bytes_remaining = archive_entry_size(entry);
188 cpio->padding = PAD4(cpio->entry_bytes_remaining);
190 /* Write the symlink now. */
191 if (p != NULL && *p != '\0') {
192 ret = (a->compressor.write)(a, p, strlen(p));
193 if (ret != ARCHIVE_OK)
194 return (ARCHIVE_FATAL);
195 pad = PAD4(strlen(p));
196 ret = (a->compressor.write)(a, "\0\0\0", pad);
199 if (ret == ARCHIVE_OK)
205 archive_write_newc_data(struct archive_write *a, const void *buff, size_t s)
210 cpio = (struct cpio *)a->format_data;
211 if (s > cpio->entry_bytes_remaining)
212 s = cpio->entry_bytes_remaining;
214 ret = (a->compressor.write)(a, buff, s);
215 cpio->entry_bytes_remaining -= s;
223 * Format a number into the specified field.
226 format_hex(int64_t v, void *p, int digits)
231 max = (((int64_t)1) << (digits * 4)) - 1;
232 if (v >= 0 && v <= max) {
233 format_hex_recursive(v, (char *)p, digits);
236 format_hex_recursive(max, (char *)p, digits);
243 format_hex_recursive(int64_t v, char *p, int s)
247 v = format_hex_recursive(v, p+1, s-1);
248 *p = "0123456789abcdef"[v & 0xf];
253 archive_write_newc_finish(struct archive_write *a)
256 struct archive_entry *trailer;
258 trailer = archive_entry_new();
259 archive_entry_set_nlink(trailer, 1);
260 archive_entry_set_pathname(trailer, "TRAILER!!!");
261 er = archive_write_newc_header(a, trailer);
262 archive_entry_free(trailer);
267 archive_write_newc_destroy(struct archive_write *a)
271 cpio = (struct cpio *)a->format_data;
273 a->format_data = NULL;
278 archive_write_newc_finish_entry(struct archive_write *a)
284 cpio = (struct cpio *)a->format_data;
285 while (cpio->entry_bytes_remaining > 0) {
286 to_write = cpio->entry_bytes_remaining < a->null_length ?
287 cpio->entry_bytes_remaining : a->null_length;
288 ret = (a->compressor.write)(a, a->nulls, to_write);
289 if (ret != ARCHIVE_OK)
291 cpio->entry_bytes_remaining -= to_write;
293 ret = (a->compressor.write)(a, a->nulls, cpio->padding);