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("$FreeBSD$");
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_format = ARCHIVE_FORMAT_AR_BSD;
91 a->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_format = ARCHIVE_FORMAT_AR_GNU;
103 a->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;
148 ar = (struct ar_w *)a->format_data;
153 * Reject files with empty name.
155 pathname = archive_entry_pathname(entry);
156 if (*pathname == '\0') {
157 archive_set_error(&a->archive, EINVAL,
159 return (ARCHIVE_WARN);
163 * If we are now at the beginning of the archive,
164 * we need first write the ar global header.
166 if (a->archive.file_position == 0)
167 (a->compressor.write)(a, "!<arch>\n", 8);
169 memset(buff, ' ', 60);
170 strncpy(&buff[AR_fmag_offset], "`\n", 2);
172 if (strcmp(pathname, "/") == 0 ) {
173 /* Entry is archive symbol table in GNU format */
174 buff[AR_name_offset] = '/';
177 if (strcmp(pathname, "__.SYMDEF") == 0) {
178 /* Entry is archive symbol table in BSD format */
179 strncpy(buff + AR_name_offset, "__.SYMDEF", 9);
182 if (strcmp(pathname, "//") == 0) {
184 * Entry is archive filename table, inform that we should
185 * collect strtab in next _data call.
188 buff[AR_name_offset] = buff[AR_name_offset + 1] = '/';
190 * For archive string table, only ar_size filed should
197 * Otherwise, entry is a normal archive member.
198 * Strip leading paths from filenames, if any.
200 if ((filename = ar_basename(pathname)) == NULL) {
201 /* Reject filenames with trailing "/" */
202 archive_set_error(&a->archive, EINVAL,
204 return (ARCHIVE_WARN);
207 if (a->archive_format == ARCHIVE_FORMAT_AR_GNU) {
209 * SVR4/GNU variant use a "/" to mark then end of the filename,
210 * make it possible to have embedded spaces in the filename.
211 * So, the longest filename here (without extension) is
214 if (strlen(filename) <= 15) {
215 strncpy(&buff[AR_name_offset],
216 filename, strlen(filename));
217 buff[AR_name_offset + strlen(filename)] = '/';
220 * For filename longer than 15 bytes, GNU variant
221 * makes use of a string table and instead stores the
222 * offset of the real filename to in the ar_name field.
223 * The string table should have been written before.
225 if (ar->has_strtab <= 0) {
226 archive_set_error(&a->archive, EINVAL,
227 "Can't find string table");
228 return (ARCHIVE_WARN);
231 se = (char *)malloc(strlen(filename) + 3);
233 archive_set_error(&a->archive, ENOMEM,
234 "Can't allocate filename buffer");
235 return (ARCHIVE_FATAL);
238 strncpy(se, filename, strlen(filename));
239 strcpy(se + strlen(filename), "/\n");
241 ss = strstr(ar->strtab, se);
245 archive_set_error(&a->archive, EINVAL,
246 "Invalid string table");
247 return (ARCHIVE_WARN);
251 * GNU variant puts "/" followed by digits into
252 * ar_name field. These digits indicates the real
253 * filename string's offset to the string table.
255 buff[AR_name_offset] = '/';
256 if (format_decimal(ss - ar->strtab,
257 buff + AR_name_offset + 1,
259 archive_set_error(&a->archive, ERANGE,
260 "string table offset too large");
261 return (ARCHIVE_WARN);
264 } else if (a->archive_format == ARCHIVE_FORMAT_AR_BSD) {
266 * BSD variant: for any file name which is more than
267 * 16 chars or contains one or more embedded space(s), the
268 * string "#1/" followed by the ASCII length of the name is
269 * put into the ar_name field. The file size (stored in the
270 * ar_size field) is incremented by the length of the name.
271 * The name is then written immediately following the
274 if (strlen(filename) <= 16 && strchr(filename, ' ') == NULL) {
275 strncpy(&buff[AR_name_offset], filename, strlen(filename));
276 buff[AR_name_offset + strlen(filename)] = ' ';
279 strncpy(buff + AR_name_offset, "#1/", 3);
280 if (format_decimal(strlen(filename),
281 buff + AR_name_offset + 3,
283 archive_set_error(&a->archive, ERANGE,
284 "File name too long");
285 return (ARCHIVE_WARN);
288 archive_entry_set_size(entry,
289 archive_entry_size(entry) + strlen(filename));
294 if (format_decimal(archive_entry_mtime(entry), buff + AR_date_offset, AR_date_size)) {
295 archive_set_error(&a->archive, ERANGE,
296 "File modification time too large");
297 return (ARCHIVE_WARN);
299 if (format_decimal(archive_entry_uid(entry), buff + AR_uid_offset, AR_uid_size)) {
300 archive_set_error(&a->archive, ERANGE,
301 "Numeric user ID too large");
302 return (ARCHIVE_WARN);
304 if (format_decimal(archive_entry_gid(entry), buff + AR_gid_offset, AR_gid_size)) {
305 archive_set_error(&a->archive, ERANGE,
306 "Numeric group ID too large");
307 return (ARCHIVE_WARN);
309 if (format_octal(archive_entry_mode(entry), buff + AR_mode_offset, AR_mode_size)) {
310 archive_set_error(&a->archive, ERANGE,
311 "Numeric mode too large");
312 return (ARCHIVE_WARN);
315 * Sanity Check: A non-pseudo archive member should always be
318 if (filename != NULL && archive_entry_filetype(entry) != AE_IFREG) {
319 archive_set_error(&a->archive, EINVAL,
320 "Regular file required for non-pseudo member");
321 return (ARCHIVE_WARN);
325 if (format_decimal(archive_entry_size(entry), buff + AR_size_offset,
327 archive_set_error(&a->archive, ERANGE,
328 "File size out of range");
329 return (ARCHIVE_WARN);
332 ret = (a->compressor.write)(a, buff, 60);
333 if (ret != ARCHIVE_OK)
336 ar->entry_bytes_remaining = archive_entry_size(entry);
337 ar->entry_padding = ar->entry_bytes_remaining % 2;
340 ret = (a->compressor.write)(a, filename, strlen(filename));
341 if (ret != ARCHIVE_OK)
343 ar->entry_bytes_remaining -= strlen(filename);
350 archive_write_ar_data(struct archive_write *a, const void *buff, size_t s)
355 ar = (struct ar_w *)a->format_data;
356 if (s > ar->entry_bytes_remaining)
357 s = ar->entry_bytes_remaining;
359 if (ar->is_strtab > 0) {
360 if (ar->has_strtab > 0) {
361 archive_set_error(&a->archive, EINVAL,
362 "More than one string tables exist");
363 return (ARCHIVE_WARN);
366 ar->strtab = (char *)malloc(s);
367 if (ar->strtab == NULL) {
368 archive_set_error(&a->archive, ENOMEM,
369 "Can't allocate strtab buffer");
370 return (ARCHIVE_FATAL);
372 strncpy(ar->strtab, buff, s);
376 ret = (a->compressor.write)(a, buff, s);
377 if (ret != ARCHIVE_OK)
380 ar->entry_bytes_remaining -= s;
385 archive_write_ar_destroy(struct archive_write *a)
389 ar = (struct ar_w *)a->format_data;
391 if (ar->has_strtab > 0) {
397 a->format_data = NULL;
402 archive_write_ar_finish(struct archive_write *a)
407 * If we haven't written anything yet, we need to write
408 * the ar global header now to make it a valid ar archive.
410 if (a->archive.file_position == 0) {
411 ret = (a->compressor.write)(a, "!<arch>\n", 8);
419 archive_write_ar_finish_entry(struct archive_write *a)
424 ar = (struct ar_w *)a->format_data;
426 if (ar->entry_bytes_remaining != 0) {
427 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
428 "Entry remaining bytes larger than 0");
429 return (ARCHIVE_WARN);
432 if (ar->entry_padding == 0) {
436 if (ar->entry_padding != 1) {
437 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
438 "Padding wrong size: %d should be 1 or 0",
440 return (ARCHIVE_WARN);
443 ret = (a->compressor.write)(a, "\n", 1);
448 * Format a number into the specified field using base-8.
449 * NB: This version is slightly different from the one in
453 format_octal(int64_t v, char *p, int s)
461 /* Octal values can't be negative, so use 0. */
468 p += s; /* Start at the end and work backwards. */
470 *--p = (char)('0' + (v & 7));
472 } while (--s > 0 && v > 0);
475 memmove(h, p, len - s);
481 /* If it overflowed, fill field with max value. */
489 * Format a number into the specified field using base-10.
492 format_decimal(int64_t v, char *p, int s)
500 /* Negative values in ar header are meaningless , so use 0. */
509 *--p = (char)('0' + (v % 10));
511 } while (--s > 0 && v > 0);
514 memmove(h, p, len - s);
520 /* If it overflowed, fill field with max value. */
528 ar_basename(const char *path)
530 const char *endp, *startp;
532 endp = path + strlen(path) - 1;
534 * For filename with trailing slash(es), we return
535 * NULL indicating an error.
540 /* Find the start of the base */
542 while (startp > path && *(startp - 1) != '/')