1 /*-
2 * Copyright (c) 2003-2007 Tim Kientzle
3 * Copyright (c) 2006 Rudolf Marek SYSGO s.r.o.
4 * Copyright (c) 2011-2012 Michihiro NAKAJIMA
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "archive_platform.h"
29 __FBSDID("$FreeBSD: head/lib/libarchive/archive_write_set_format_cpio_newc.c 201160 2009-12-29 05:41:57Z kientzle $");
30
31 #ifdef HAVE_ERRNO_H
32 #include <errno.h>
33 #endif
34 #include <stdio.h>
35 #ifdef HAVE_STDLIB_H
36 #include <stdlib.h>
37 #endif
38 #ifdef HAVE_STRING_H
39 #include <string.h>
40 #endif
41
42 #include "archive.h"
43 #include "archive_entry.h"
44 #include "archive_entry_locale.h"
45 #include "archive_private.h"
46 #include "archive_write_private.h"
47 #include "archive_write_set_format_private.h"
48
49 static ssize_t archive_write_newc_data(struct archive_write *,
50 const void *buff, size_t s);
51 static int archive_write_newc_close(struct archive_write *);
52 static int archive_write_newc_free(struct archive_write *);
53 static int archive_write_newc_finish_entry(struct archive_write *);
54 static int archive_write_newc_header(struct archive_write *,
55 struct archive_entry *);
56 static int archive_write_newc_options(struct archive_write *,
57 const char *, const char *);
58 static int format_hex(int64_t, void *, int);
59 static int64_t format_hex_recursive(int64_t, char *, int);
60 static int write_header(struct archive_write *, struct archive_entry *);
61
62 struct cpio {
63 uint64_t entry_bytes_remaining;
64 int padding;
65
66 struct archive_string_conv *opt_sconv;
67 struct archive_string_conv *sconv_default;
68 int init_default_conversion;
69 };
70
71 #define c_magic_offset 0
72 #define c_magic_size 6
73 #define c_ino_offset 6
74 #define c_ino_size 8
75 #define c_mode_offset 14
76 #define c_mode_size 8
77 #define c_uid_offset 22
78 #define c_uid_size 8
79 #define c_gid_offset 30
80 #define c_gid_size 8
81 #define c_nlink_offset 38
82 #define c_nlink_size 8
83 #define c_mtime_offset 46
84 #define c_mtime_size 8
85 #define c_filesize_offset 54
86 #define c_filesize_size 8
87 #define c_devmajor_offset 62
88 #define c_devmajor_size 8
89 #define c_devminor_offset 70
90 #define c_devminor_size 8
91 #define c_rdevmajor_offset 78
92 #define c_rdevmajor_size 8
93 #define c_rdevminor_offset 86
94 #define c_rdevminor_size 8
95 #define c_namesize_offset 94
96 #define c_namesize_size 8
97 #define c_checksum_offset 102
98 #define c_checksum_size 8
99 #define c_header_size 110
100
101 /* Logic trick: difference between 'n' and next multiple of 4 */
102 #define PAD4(n) (3 & (1 + ~(n)))
103
104 /*
105 * Set output format to 'cpio' format.
106 */
107 int
archive_write_set_format_cpio_newc(struct archive * _a)108 archive_write_set_format_cpio_newc(struct archive *_a)
109 {
110 struct archive_write *a = (struct archive_write *)_a;
111 struct cpio *cpio;
112
113 archive_check_magic(_a, ARCHIVE_WRITE_MAGIC,
114 ARCHIVE_STATE_NEW, "archive_write_set_format_cpio_newc");
115
116 /* If someone else was already registered, unregister them. */
117 if (a->format_free != NULL)
118 (a->format_free)(a);
119
120 cpio = (struct cpio *)calloc(1, sizeof(*cpio));
121 if (cpio == NULL) {
122 archive_set_error(&a->archive, ENOMEM, "Can't allocate cpio data");
123 return (ARCHIVE_FATAL);
124 }
125 a->format_data = cpio;
126 a->format_name = "cpio";
127 a->format_options = archive_write_newc_options;
128 a->format_write_header = archive_write_newc_header;
129 a->format_write_data = archive_write_newc_data;
130 a->format_finish_entry = archive_write_newc_finish_entry;
131 a->format_close = archive_write_newc_close;
132 a->format_free = archive_write_newc_free;
133 a->archive.archive_format = ARCHIVE_FORMAT_CPIO_SVR4_NOCRC;
134 a->archive.archive_format_name = "SVR4 cpio nocrc";
135 return (ARCHIVE_OK);
136 }
137
138 static int
archive_write_newc_options(struct archive_write * a,const char * key,const char * val)139 archive_write_newc_options(struct archive_write *a, const char *key,
140 const char *val)
141 {
142 struct cpio *cpio = (struct cpio *)a->format_data;
143 int ret = ARCHIVE_FAILED;
144
145 if (strcmp(key, "hdrcharset") == 0) {
146 if (val == NULL || val[0] == 0)
147 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
148 "%s: hdrcharset option needs a character-set name",
149 a->format_name);
150 else {
151 cpio->opt_sconv = archive_string_conversion_to_charset(
152 &a->archive, val, 0);
153 if (cpio->opt_sconv != NULL)
154 ret = ARCHIVE_OK;
155 else
156 ret = ARCHIVE_FATAL;
157 }
158 return (ret);
159 }
160
161 /* Note: The "warn" return is just to inform the options
162 * supervisor that we didn't handle it. It will generate
163 * a suitable error if no one used this option. */
164 return (ARCHIVE_WARN);
165 }
166
167 static struct archive_string_conv *
get_sconv(struct archive_write * a)168 get_sconv(struct archive_write *a)
169 {
170 struct cpio *cpio;
171 struct archive_string_conv *sconv;
172
173 cpio = (struct cpio *)a->format_data;
174 sconv = cpio->opt_sconv;
175 if (sconv == NULL) {
176 if (!cpio->init_default_conversion) {
177 cpio->sconv_default =
178 archive_string_default_conversion_for_write(
179 &(a->archive));
180 cpio->init_default_conversion = 1;
181 }
182 sconv = cpio->sconv_default;
183 }
184 return (sconv);
185 }
186
187 static int
archive_write_newc_header(struct archive_write * a,struct archive_entry * entry)188 archive_write_newc_header(struct archive_write *a, struct archive_entry *entry)
189 {
190 const char *path;
191 size_t len;
192
193 if (archive_entry_filetype(entry) == 0 && archive_entry_hardlink(entry) == NULL) {
194 archive_set_error(&a->archive, -1, "Filetype required");
195 return (ARCHIVE_FAILED);
196 }
197
198 if (archive_entry_pathname_l(entry, &path, &len, get_sconv(a)) != 0
199 && errno == ENOMEM) {
200 archive_set_error(&a->archive, ENOMEM,
201 "Can't allocate memory for Pathname");
202 return (ARCHIVE_FATAL);
203 }
204 if (len == 0 || path == NULL || path[0] == '\0') {
205 archive_set_error(&a->archive, -1, "Pathname required");
206 return (ARCHIVE_FAILED);
207 }
208
209 if (archive_entry_hardlink(entry) == NULL
210 && (!archive_entry_size_is_set(entry) || archive_entry_size(entry) < 0)) {
211 archive_set_error(&a->archive, -1, "Size required");
212 return (ARCHIVE_FAILED);
213 }
214 return write_header(a, entry);
215 }
216
217 static int
write_header(struct archive_write * a,struct archive_entry * entry)218 write_header(struct archive_write *a, struct archive_entry *entry)
219 {
220 int64_t ino;
221 struct cpio *cpio;
222 const char *p, *path;
223 int pathlength, ret, ret_final;
224 char h[c_header_size];
225 struct archive_string_conv *sconv;
226 struct archive_entry *entry_main;
227 size_t len;
228 int pad;
229
230 cpio = (struct cpio *)a->format_data;
231 ret_final = ARCHIVE_OK;
232 sconv = get_sconv(a);
233
234 #if defined(_WIN32) && !defined(__CYGWIN__)
235 /* Make sure the path separators in pathname, hardlink and symlink
236 * are all slash '/', not the Windows path separator '\'. */
237 entry_main = __la_win_entry_in_posix_pathseparator(entry);
238 if (entry_main == NULL) {
239 archive_set_error(&a->archive, ENOMEM,
240 "Can't allocate ustar data");
241 return(ARCHIVE_FATAL);
242 }
243 if (entry != entry_main)
244 entry = entry_main;
245 else
246 entry_main = NULL;
247 #else
248 entry_main = NULL;
249 #endif
250
251 ret = archive_entry_pathname_l(entry, &path, &len, sconv);
252 if (ret != 0) {
253 if (errno == ENOMEM) {
254 archive_set_error(&a->archive, ENOMEM,
255 "Can't allocate memory for Pathname");
256 ret_final = ARCHIVE_FATAL;
257 goto exit_write_header;
258 }
259 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
260 "Can't translate pathname '%s' to %s",
261 archive_entry_pathname(entry),
262 archive_string_conversion_charset_name(sconv));
263 ret_final = ARCHIVE_WARN;
264 }
265 pathlength = (int)len + 1; /* Include trailing null. */
266
267 memset(h, 0, c_header_size);
268 format_hex(0x070701, h + c_magic_offset, c_magic_size);
269 format_hex(archive_entry_devmajor(entry), h + c_devmajor_offset,
270 c_devmajor_size);
271 format_hex(archive_entry_devminor(entry), h + c_devminor_offset,
272 c_devminor_size);
273
274 ino = archive_entry_ino64(entry);
275 if (ino > 0xffffffff) {
276 archive_set_error(&a->archive, ERANGE,
277 "large inode number truncated");
278 ret_final = ARCHIVE_WARN;
279 }
280
281 /* TODO: Set ret_final to ARCHIVE_WARN if any of these overflow. */
282 format_hex(ino & 0xffffffff, h + c_ino_offset, c_ino_size);
283 format_hex(archive_entry_mode(entry), h + c_mode_offset, c_mode_size);
284 format_hex(archive_entry_uid(entry), h + c_uid_offset, c_uid_size);
285 format_hex(archive_entry_gid(entry), h + c_gid_offset, c_gid_size);
286 format_hex(archive_entry_nlink(entry), h + c_nlink_offset, c_nlink_size);
287 if (archive_entry_filetype(entry) == AE_IFBLK
288 || archive_entry_filetype(entry) == AE_IFCHR) {
289 format_hex(archive_entry_rdevmajor(entry), h + c_rdevmajor_offset, c_rdevmajor_size);
290 format_hex(archive_entry_rdevminor(entry), h + c_rdevminor_offset, c_rdevminor_size);
291 } else {
292 format_hex(0, h + c_rdevmajor_offset, c_rdevmajor_size);
293 format_hex(0, h + c_rdevminor_offset, c_rdevminor_size);
294 }
295 format_hex(archive_entry_mtime(entry), h + c_mtime_offset, c_mtime_size);
296 format_hex(pathlength, h + c_namesize_offset, c_namesize_size);
297 format_hex(0, h + c_checksum_offset, c_checksum_size);
298
299 /* Non-regular files don't store bodies. */
300 if (archive_entry_filetype(entry) != AE_IFREG)
301 archive_entry_set_size(entry, 0);
302
303 /* Symlinks get the link written as the body of the entry. */
304 ret = archive_entry_symlink_l(entry, &p, &len, sconv);
305 if (ret != 0) {
306 if (errno == ENOMEM) {
307 archive_set_error(&a->archive, ENOMEM,
308 "Can't allocate memory for Likname");
309 ret_final = ARCHIVE_FATAL;
310 goto exit_write_header;
311 }
312 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
313 "Can't translate linkname '%s' to %s",
314 archive_entry_symlink(entry),
315 archive_string_conversion_charset_name(sconv));
316 ret_final = ARCHIVE_WARN;
317 }
318 if (len > 0 && p != NULL && *p != '\0')
319 ret = format_hex(strlen(p), h + c_filesize_offset,
320 c_filesize_size);
321 else
322 ret = format_hex(archive_entry_size(entry),
323 h + c_filesize_offset, c_filesize_size);
324 if (ret) {
325 archive_set_error(&a->archive, ERANGE,
326 "File is too large for this format.");
327 ret_final = ARCHIVE_FAILED;
328 goto exit_write_header;
329 }
330
331 ret = __archive_write_output(a, h, c_header_size);
332 if (ret != ARCHIVE_OK) {
333 ret_final = ARCHIVE_FATAL;
334 goto exit_write_header;
335 }
336
337 /* Pad pathname to even length. */
338 ret = __archive_write_output(a, path, pathlength);
339 if (ret != ARCHIVE_OK) {
340 ret_final = ARCHIVE_FATAL;
341 goto exit_write_header;
342 }
343 pad = PAD4(pathlength + c_header_size);
344 if (pad) {
345 ret = __archive_write_output(a, "\0\0\0", pad);
346 if (ret != ARCHIVE_OK) {
347 ret_final = ARCHIVE_FATAL;
348 goto exit_write_header;
349 }
350 }
351
352 cpio->entry_bytes_remaining = archive_entry_size(entry);
353 cpio->padding = (int)PAD4(cpio->entry_bytes_remaining);
354
355 /* Write the symlink now. */
356 if (p != NULL && *p != '\0') {
357 ret = __archive_write_output(a, p, strlen(p));
358 if (ret != ARCHIVE_OK) {
359 ret_final = ARCHIVE_FATAL;
360 goto exit_write_header;
361 }
362 pad = PAD4(strlen(p));
363 ret = __archive_write_output(a, "\0\0\0", pad);
364 if (ret != ARCHIVE_OK) {
365 ret_final = ARCHIVE_FATAL;
366 goto exit_write_header;
367 }
368 }
369 exit_write_header:
370 archive_entry_free(entry_main);
371 return (ret_final);
372 }
373
374 static ssize_t
archive_write_newc_data(struct archive_write * a,const void * buff,size_t s)375 archive_write_newc_data(struct archive_write *a, const void *buff, size_t s)
376 {
377 struct cpio *cpio;
378 int ret;
379
380 cpio = (struct cpio *)a->format_data;
381 if (s > cpio->entry_bytes_remaining)
382 s = (size_t)cpio->entry_bytes_remaining;
383
384 ret = __archive_write_output(a, buff, s);
385 cpio->entry_bytes_remaining -= s;
386 if (ret >= 0)
387 return (s);
388 else
389 return (ret);
390 }
391
392 /*
393 * Format a number into the specified field.
394 */
395 static int
format_hex(int64_t v,void * p,int digits)396 format_hex(int64_t v, void *p, int digits)
397 {
398 int64_t max;
399 int ret;
400
401 max = (((int64_t)1) << (digits * 4)) - 1;
402 if (v >= 0 && v <= max) {
403 format_hex_recursive(v, (char *)p, digits);
404 ret = 0;
405 } else {
406 format_hex_recursive(max, (char *)p, digits);
407 ret = -1;
408 }
409 return (ret);
410 }
411
412 static int64_t
format_hex_recursive(int64_t v,char * p,int s)413 format_hex_recursive(int64_t v, char *p, int s)
414 {
415 if (s == 0)
416 return (v);
417 v = format_hex_recursive(v, p+1, s-1);
418 *p = "0123456789abcdef"[v & 0xf];
419 return (v >> 4);
420 }
421
422 static int
archive_write_newc_close(struct archive_write * a)423 archive_write_newc_close(struct archive_write *a)
424 {
425 int er;
426 struct archive_entry *trailer;
427
428 trailer = archive_entry_new();
429 archive_entry_set_nlink(trailer, 1);
430 archive_entry_set_size(trailer, 0);
431 archive_entry_set_pathname(trailer, "TRAILER!!!");
432 /* Bypass the required data checks. */
433 er = write_header(a, trailer);
434 archive_entry_free(trailer);
435 return (er);
436 }
437
438 static int
archive_write_newc_free(struct archive_write * a)439 archive_write_newc_free(struct archive_write *a)
440 {
441 struct cpio *cpio;
442
443 cpio = (struct cpio *)a->format_data;
444 free(cpio);
445 a->format_data = NULL;
446 return (ARCHIVE_OK);
447 }
448
449 static int
archive_write_newc_finish_entry(struct archive_write * a)450 archive_write_newc_finish_entry(struct archive_write *a)
451 {
452 struct cpio *cpio;
453
454 cpio = (struct cpio *)a->format_data;
455 return (__archive_write_nulls(a,
456 (size_t)cpio->entry_bytes_remaining + cpio->padding));
457 }
458