2 * Copyright (c) 2007 Kai Wang
3 * Copyright (c) 2007 Tim Kientzle
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 * in this position and unchanged.
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.
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.
28 #include "archive_platform.h"
29 __FBSDID("$FreeBSD: src/lib/libarchive/archive_write_set_format_ar.c,v 1.7 2008/05/26 17:00:23 kientzle Exp $");
42 #include "archive_entry.h"
43 #include "archive_private.h"
44 #include "archive_write_private.h"
47 uint64_t entry_bytes_remaining
;
48 uint64_t entry_padding
;
55 * Define structure of the "ar" header.
57 #define AR_name_offset 0
58 #define AR_name_size 16
59 #define AR_date_offset 16
60 #define AR_date_size 12
61 #define AR_uid_offset 28
63 #define AR_gid_offset 34
65 #define AR_mode_offset 40
66 #define AR_mode_size 8
67 #define AR_size_offset 48
68 #define AR_size_size 10
69 #define AR_fmag_offset 58
70 #define AR_fmag_size 2
72 static int archive_write_set_format_ar(struct archive_write
*);
73 static int archive_write_ar_header(struct archive_write
*,
74 struct archive_entry
*);
75 static ssize_t
archive_write_ar_data(struct archive_write
*,
76 const void *buff
, size_t s
);
77 static int archive_write_ar_destroy(struct archive_write
*);
78 static int archive_write_ar_finish(struct archive_write
*);
79 static int archive_write_ar_finish_entry(struct archive_write
*);
80 static const char *ar_basename(const char *path
);
81 static int format_octal(int64_t v
, char *p
, int s
);
82 static int format_decimal(int64_t v
, char *p
, int s
);
85 archive_write_set_format_ar_bsd(struct archive
*_a
)
87 struct archive_write
*a
= (struct archive_write
*)_a
;
88 int r
= archive_write_set_format_ar(a
);
89 if (r
== ARCHIVE_OK
) {
90 a
->archive
.archive_format
= ARCHIVE_FORMAT_AR_BSD
;
91 a
->archive
.archive_format_name
= "ar (BSD)";
97 archive_write_set_format_ar_svr4(struct archive
*_a
)
99 struct archive_write
*a
= (struct archive_write
*)_a
;
100 int r
= archive_write_set_format_ar(a
);
101 if (r
== ARCHIVE_OK
) {
102 a
->archive
.archive_format
= ARCHIVE_FORMAT_AR_GNU
;
103 a
->archive
.archive_format_name
= "ar (GNU/SVR4)";
109 * Generic initialization.
112 archive_write_set_format_ar(struct archive_write
*a
)
116 /* If someone else was already registered, unregister them. */
117 if (a
->format_destroy
!= NULL
)
118 (a
->format_destroy
)(a
);
120 ar
= (struct ar_w
*)malloc(sizeof(*ar
));
122 archive_set_error(&a
->archive
, ENOMEM
, "Can't allocate ar data");
123 return (ARCHIVE_FATAL
);
125 memset(ar
, 0, sizeof(*ar
));
128 a
->format_write_header
= archive_write_ar_header
;
129 a
->format_write_data
= archive_write_ar_data
;
130 a
->format_finish
= archive_write_ar_finish
;
131 a
->format_destroy
= archive_write_ar_destroy
;
132 a
->format_finish_entry
= archive_write_ar_finish_entry
;
137 archive_write_ar_header(struct archive_write
*a
, struct archive_entry
*entry
)
143 const char *pathname
;
144 const char *filename
;
149 ar
= (struct ar_w
*)a
->format_data
;
152 size
= archive_entry_size(entry
);
156 * Reject files with empty name.
158 pathname
= archive_entry_pathname(entry
);
159 if (*pathname
== '\0') {
160 archive_set_error(&a
->archive
, EINVAL
,
162 return (ARCHIVE_WARN
);
166 * If we are now at the beginning of the archive,
167 * we need first write the ar global header.
169 if (a
->archive
.file_position
== 0)
170 (a
->compressor
.write
)(a
, "!<arch>\n", 8);
172 memset(buff
, ' ', 60);
173 strncpy(&buff
[AR_fmag_offset
], "`\n", 2);
175 if (strcmp(pathname
, "/") == 0 ) {
176 /* Entry is archive symbol table in GNU format */
177 buff
[AR_name_offset
] = '/';
180 if (strcmp(pathname
, "__.SYMDEF") == 0) {
181 /* Entry is archive symbol table in BSD format */
182 strncpy(buff
+ AR_name_offset
, "__.SYMDEF", 9);
185 if (strcmp(pathname
, "//") == 0) {
187 * Entry is archive filename table, inform that we should
188 * collect strtab in next _data call.
191 buff
[AR_name_offset
] = buff
[AR_name_offset
+ 1] = '/';
193 * For archive string table, only ar_size filed should
200 * Otherwise, entry is a normal archive member.
201 * Strip leading paths from filenames, if any.
203 if ((filename
= ar_basename(pathname
)) == NULL
) {
204 /* Reject filenames with trailing "/" */
205 archive_set_error(&a
->archive
, EINVAL
,
207 return (ARCHIVE_WARN
);
210 if (a
->archive
.archive_format
== ARCHIVE_FORMAT_AR_GNU
) {
212 * SVR4/GNU variant use a "/" to mark then end of the filename,
213 * make it possible to have embedded spaces in the filename.
214 * So, the longest filename here (without extension) is
217 if (strlen(filename
) <= 15) {
218 strncpy(&buff
[AR_name_offset
],
219 filename
, strlen(filename
));
220 buff
[AR_name_offset
+ strlen(filename
)] = '/';
223 * For filename longer than 15 bytes, GNU variant
224 * makes use of a string table and instead stores the
225 * offset of the real filename to in the ar_name field.
226 * The string table should have been written before.
228 if (ar
->has_strtab
<= 0) {
229 archive_set_error(&a
->archive
, EINVAL
,
230 "Can't find string table");
231 return (ARCHIVE_WARN
);
234 se
= (char *)malloc(strlen(filename
) + 3);
236 archive_set_error(&a
->archive
, ENOMEM
,
237 "Can't allocate filename buffer");
238 return (ARCHIVE_FATAL
);
241 strncpy(se
, filename
, strlen(filename
));
242 strcpy(se
+ strlen(filename
), "/\n");
244 ss
= strstr(ar
->strtab
, se
);
248 archive_set_error(&a
->archive
, EINVAL
,
249 "Invalid string table");
250 return (ARCHIVE_WARN
);
254 * GNU variant puts "/" followed by digits into
255 * ar_name field. These digits indicates the real
256 * filename string's offset to the string table.
258 buff
[AR_name_offset
] = '/';
259 if (format_decimal(ss
- ar
->strtab
,
260 buff
+ AR_name_offset
+ 1,
262 archive_set_error(&a
->archive
, ERANGE
,
263 "string table offset too large");
264 return (ARCHIVE_WARN
);
267 } else if (a
->archive
.archive_format
== ARCHIVE_FORMAT_AR_BSD
) {
269 * BSD variant: for any file name which is more than
270 * 16 chars or contains one or more embedded space(s), the
271 * string "#1/" followed by the ASCII length of the name is
272 * put into the ar_name field. The file size (stored in the
273 * ar_size field) is incremented by the length of the name.
274 * The name is then written immediately following the
277 if (strlen(filename
) <= 16 && strchr(filename
, ' ') == NULL
) {
278 strncpy(&buff
[AR_name_offset
], filename
, strlen(filename
));
279 buff
[AR_name_offset
+ strlen(filename
)] = ' ';
282 strncpy(buff
+ AR_name_offset
, "#1/", 3);
283 if (format_decimal(strlen(filename
),
284 buff
+ AR_name_offset
+ 3,
286 archive_set_error(&a
->archive
, ERANGE
,
287 "File name too long");
288 return (ARCHIVE_WARN
);
291 size
+= strlen(filename
);
296 if (format_decimal(archive_entry_mtime(entry
), buff
+ AR_date_offset
, AR_date_size
)) {
297 archive_set_error(&a
->archive
, ERANGE
,
298 "File modification time too large");
299 return (ARCHIVE_WARN
);
301 if (format_decimal(archive_entry_uid(entry
), buff
+ AR_uid_offset
, AR_uid_size
)) {
302 archive_set_error(&a
->archive
, ERANGE
,
303 "Numeric user ID too large");
304 return (ARCHIVE_WARN
);
306 if (format_decimal(archive_entry_gid(entry
), buff
+ AR_gid_offset
, AR_gid_size
)) {
307 archive_set_error(&a
->archive
, ERANGE
,
308 "Numeric group ID too large");
309 return (ARCHIVE_WARN
);
311 if (format_octal(archive_entry_mode(entry
), buff
+ AR_mode_offset
, AR_mode_size
)) {
312 archive_set_error(&a
->archive
, ERANGE
,
313 "Numeric mode too large");
314 return (ARCHIVE_WARN
);
317 * Sanity Check: A non-pseudo archive member should always be
320 if (filename
!= NULL
&& archive_entry_filetype(entry
) != AE_IFREG
) {
321 archive_set_error(&a
->archive
, EINVAL
,
322 "Regular file required for non-pseudo member");
323 return (ARCHIVE_WARN
);
327 if (format_decimal(size
, buff
+ AR_size_offset
, AR_size_size
)) {
328 archive_set_error(&a
->archive
, ERANGE
,
329 "File size out of range");
330 return (ARCHIVE_WARN
);
333 ret
= (a
->compressor
.write
)(a
, buff
, 60);
334 if (ret
!= ARCHIVE_OK
)
337 ar
->entry_bytes_remaining
= size
;
338 ar
->entry_padding
= ar
->entry_bytes_remaining
% 2;
341 ret
= (a
->compressor
.write
)(a
, filename
, strlen(filename
));
342 if (ret
!= ARCHIVE_OK
)
344 ar
->entry_bytes_remaining
-= strlen(filename
);
351 archive_write_ar_data(struct archive_write
*a
, const void *buff
, size_t s
)
356 ar
= (struct ar_w
*)a
->format_data
;
357 if (s
> ar
->entry_bytes_remaining
)
358 s
= ar
->entry_bytes_remaining
;
360 if (ar
->is_strtab
> 0) {
361 if (ar
->has_strtab
> 0) {
362 archive_set_error(&a
->archive
, EINVAL
,
363 "More than one string tables exist");
364 return (ARCHIVE_WARN
);
367 ar
->strtab
= (char *)malloc(s
);
368 if (ar
->strtab
== NULL
) {
369 archive_set_error(&a
->archive
, ENOMEM
,
370 "Can't allocate strtab buffer");
371 return (ARCHIVE_FATAL
);
373 strncpy(ar
->strtab
, buff
, s
);
377 ret
= (a
->compressor
.write
)(a
, buff
, s
);
378 if (ret
!= ARCHIVE_OK
)
381 ar
->entry_bytes_remaining
-= s
;
386 archive_write_ar_destroy(struct archive_write
*a
)
390 ar
= (struct ar_w
*)a
->format_data
;
392 if (ar
->has_strtab
> 0) {
398 a
->format_data
= NULL
;
403 archive_write_ar_finish(struct archive_write
*a
)
408 * If we haven't written anything yet, we need to write
409 * the ar global header now to make it a valid ar archive.
411 if (a
->archive
.file_position
== 0) {
412 ret
= (a
->compressor
.write
)(a
, "!<arch>\n", 8);
420 archive_write_ar_finish_entry(struct archive_write
*a
)
425 ar
= (struct ar_w
*)a
->format_data
;
427 if (ar
->entry_bytes_remaining
!= 0) {
428 archive_set_error(&a
->archive
, ARCHIVE_ERRNO_MISC
,
429 "Entry remaining bytes larger than 0");
430 return (ARCHIVE_WARN
);
433 if (ar
->entry_padding
== 0) {
437 if (ar
->entry_padding
!= 1) {
438 archive_set_error(&a
->archive
, ARCHIVE_ERRNO_MISC
,
439 "Padding wrong size: %d should be 1 or 0",
441 return (ARCHIVE_WARN
);
444 ret
= (a
->compressor
.write
)(a
, "\n", 1);
449 * Format a number into the specified field using base-8.
450 * NB: This version is slightly different from the one in
454 format_octal(int64_t v
, char *p
, int s
)
462 /* Octal values can't be negative, so use 0. */
469 p
+= s
; /* Start at the end and work backwards. */
471 *--p
= (char)('0' + (v
& 7));
473 } while (--s
> 0 && v
> 0);
476 memmove(h
, p
, len
- s
);
482 /* If it overflowed, fill field with max value. */
490 * Format a number into the specified field using base-10.
493 format_decimal(int64_t v
, char *p
, int s
)
501 /* Negative values in ar header are meaningless , so use 0. */
510 *--p
= (char)('0' + (v
% 10));
512 } while (--s
> 0 && v
> 0);
515 memmove(h
, p
, len
- s
);
521 /* If it overflowed, fill field with max value. */
529 ar_basename(const char *path
)
531 const char *endp
, *startp
;
533 endp
= path
+ strlen(path
) - 1;
535 * For filename with trailing slash(es), we return
536 * NULL indicating an error.
541 /* Find the start of the base */
543 while (startp
> path
&& *(startp
- 1) != '/')