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 1.2 2007/04/14 22:34:10 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_entry(struct archive_write *);
79 static const char *basename(const char *path);
80 static int format_octal(int64_t v, char *p, int s);
81 static int format_decimal(int64_t v, char *p, int s);
84 archive_write_set_format_ar_bsd(struct archive *_a)
86 struct archive_write *a = (struct archive_write *)_a;
87 int r = archive_write_set_format_ar(a);
88 if (r == ARCHIVE_OK) {
89 a->archive_format = ARCHIVE_FORMAT_AR_BSD;
90 a->archive_format_name = "ar (BSD)";
96 archive_write_set_format_ar_svr4(struct archive *_a)
98 struct archive_write *a = (struct archive_write *)_a;
99 int r = archive_write_set_format_ar(a);
100 if (r == ARCHIVE_OK) {
101 a->archive_format = ARCHIVE_FORMAT_AR_GNU;
102 a->archive_format_name = "ar (GNU/SVR4)";
108 * Generic initialization.
111 archive_write_set_format_ar(struct archive_write *a)
115 /* If someone else was already registered, unregister them. */
116 if (a->format_destroy != NULL)
117 (a->format_destroy)(a);
119 ar = (struct ar_w *)malloc(sizeof(*ar));
121 archive_set_error(&a->archive, ENOMEM, "Can't allocate ar data");
122 return (ARCHIVE_FATAL);
124 memset(ar, 0, sizeof(*ar));
127 a->format_write_header = archive_write_ar_header;
128 a->format_write_data = archive_write_ar_data;
129 a->format_finish = NULL;
130 a->format_destroy = archive_write_ar_destroy;
131 a->format_finish_entry = archive_write_ar_finish_entry;
136 archive_write_ar_header(struct archive_write *a, struct archive_entry *entry)
142 const char *pathname;
143 const char *filename;
147 ar = (struct ar_w *)a->format_data;
152 * Reject files with empty name.
154 pathname = archive_entry_pathname(entry);
155 if (*pathname == '\0') {
156 archive_set_error(&a->archive, EINVAL,
158 return (ARCHIVE_WARN);
162 * If we are now at the beginning of the archive,
163 * we need first write the ar global header.
165 if (a->archive.file_position == 0)
166 (a->compressor.write)(a, "!<arch>\n", 8);
168 memset(buff, ' ', 60);
169 strncpy(&buff[AR_fmag_offset], "`\n", 2);
171 if (strcmp(pathname, "/") == 0 ) {
172 /* Entry is archive symbol table in GNU format */
173 buff[AR_name_offset] = '/';
176 if (strcmp(pathname, "__.SYMDEF") == 0) {
177 /* Entry is archive symbol table in BSD format */
178 strncpy(buff + AR_name_offset, "__.SYMDEF", 9);
181 if (strcmp(pathname, "//") == 0) {
183 * Entry is archive filename table, inform that we should
184 * collect strtab in next _data call.
187 buff[AR_name_offset] = buff[AR_name_offset + 1] = '/';
189 * For archive string table, only ar_size filed should
196 * Otherwise, entry is a normal archive member.
197 * Strip leading paths from filenames, if any.
199 if ((filename = basename(pathname)) == NULL) {
200 /* Reject filenames with trailing "/" */
201 archive_set_error(&a->archive, EINVAL,
203 return (ARCHIVE_WARN);
206 if (a->archive_format == ARCHIVE_FORMAT_AR_GNU) {
208 * SVR4/GNU variant use a "/" to mark then end of the filename,
209 * make it possible to have embedded spaces in the filename.
210 * So, the longest filename here (without extension) is
213 if (strlen(filename) <= 15) {
214 strncpy(&buff[AR_name_offset],
215 filename, strlen(filename));
216 buff[AR_name_offset + strlen(filename)] = '/';
219 * For filename longer than 15 bytes, GNU variant
220 * makes use of a string table and instead stores the
221 * offset of the real filename to in the ar_name field.
222 * The string table should have been written before.
224 if (ar->has_strtab <= 0) {
225 archive_set_error(&a->archive, EINVAL,
226 "Can't find string table");
227 return (ARCHIVE_WARN);
230 se = (char *)malloc(strlen(filename) + 3);
232 archive_set_error(&a->archive, ENOMEM,
233 "Can't allocate filename buffer");
234 return (ARCHIVE_FATAL);
237 strncpy(se, filename, strlen(filename));
238 strcpy(se + strlen(filename), "/\n");
240 ss = strstr(ar->strtab, se);
244 archive_set_error(&a->archive, EINVAL,
245 "Invalid string table");
246 return (ARCHIVE_WARN);
250 * GNU variant puts "/" followed by digits into
251 * ar_name field. These digits indicates the real
252 * filename string's offset to the string table.
254 buff[AR_name_offset] = '/';
255 if (format_decimal(ss - ar->strtab,
256 buff + AR_name_offset + 1,
258 archive_set_error(&a->archive, ERANGE,
259 "string table offset too large");
260 return (ARCHIVE_WARN);
263 } else if (a->archive_format == ARCHIVE_FORMAT_AR_BSD) {
265 * BSD variant: for any file name which is more than
266 * 16 chars or contains one or more embedded space(s), the
267 * string "#1/" followed by the ASCII length of the name is
268 * put into the ar_name field. The file size (stored in the
269 * ar_size field) is incremented by the length of the name.
270 * The name is then written immediately following the
273 if (strlen(filename) <= 16 && strchr(filename, ' ') == NULL) {
274 strncpy(&buff[AR_name_offset], filename, strlen(filename));
275 buff[AR_name_offset + strlen(filename)] = ' ';
278 strncpy(buff + AR_name_offset, "#1/", 3);
279 if (format_decimal(strlen(filename),
280 buff + AR_name_offset + 3,
282 archive_set_error(&a->archive, ERANGE,
283 "File name too long");
284 return (ARCHIVE_WARN);
287 archive_entry_set_size(entry,
288 archive_entry_size(entry) + strlen(filename));
293 if (format_decimal(archive_entry_mtime(entry), buff + AR_date_offset, AR_date_size)) {
294 archive_set_error(&a->archive, ERANGE,
295 "File modification time too large");
296 return (ARCHIVE_WARN);
298 if (format_decimal(archive_entry_uid(entry), buff + AR_uid_offset, AR_uid_size)) {
299 archive_set_error(&a->archive, ERANGE,
300 "Numeric user ID too large");
301 return (ARCHIVE_WARN);
303 if (format_decimal(archive_entry_gid(entry), buff + AR_gid_offset, AR_gid_size)) {
304 archive_set_error(&a->archive, ERANGE,
305 "Numeric group ID too large");
306 return (ARCHIVE_WARN);
308 if (format_octal(archive_entry_mode(entry), buff + AR_mode_offset, AR_mode_size)) {
309 archive_set_error(&a->archive, ERANGE,
310 "Numeric mode too large");
311 return (ARCHIVE_WARN);
314 * Sanity Check: A non-pseudo archive member should always be
317 if (filename != NULL && archive_entry_filetype(entry) != AE_IFREG) {
318 archive_set_error(&a->archive, EINVAL,
319 "Regular file required for non-pseudo member");
320 return (ARCHIVE_WARN);
324 if (format_decimal(archive_entry_size(entry), buff + AR_size_offset,
326 archive_set_error(&a->archive, ERANGE,
327 "File size out of range");
328 return (ARCHIVE_WARN);
331 ret = (a->compressor.write)(a, buff, 60);
332 if (ret != ARCHIVE_OK)
335 ar->entry_bytes_remaining = archive_entry_size(entry);
336 ar->entry_padding = ar->entry_bytes_remaining % 2;
339 ret = (a->compressor.write)(a, filename, strlen(filename));
340 if (ret != ARCHIVE_OK)
342 ar->entry_bytes_remaining -= strlen(filename);
349 archive_write_ar_data(struct archive_write *a, const void *buff, size_t s)
354 ar = (struct ar_w *)a->format_data;
355 if (s > ar->entry_bytes_remaining)
356 s = ar->entry_bytes_remaining;
358 if (ar->is_strtab > 0) {
359 if (ar->has_strtab > 0) {
360 archive_set_error(&a->archive, EINVAL,
361 "More than one string tables exist");
362 return (ARCHIVE_WARN);
365 ar->strtab = (char *)malloc(s);
366 if (ar->strtab == NULL) {
367 archive_set_error(&a->archive, ENOMEM,
368 "Can't allocate strtab buffer");
369 return (ARCHIVE_FATAL);
371 strncpy(ar->strtab, buff, s);
375 ret = (a->compressor.write)(a, buff, s);
376 if (ret != ARCHIVE_OK)
379 ar->entry_bytes_remaining -= s;
384 archive_write_ar_destroy(struct archive_write *a)
388 ar = (struct ar_w *)a->format_data;
390 if (ar->has_strtab > 0) {
396 a->format_data = NULL;
401 archive_write_ar_finish_entry(struct archive_write *a)
406 ar = (struct ar_w *)a->format_data;
408 if (ar->entry_bytes_remaining != 0) {
409 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
410 "Entry remaining bytes larger than 0");
411 return (ARCHIVE_WARN);
414 if (ar->entry_padding == 0) {
418 if (ar->entry_padding != 1) {
419 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
420 "Padding wrong size: %d should be 1 or 0",
422 return (ARCHIVE_WARN);
425 ret = (a->compressor.write)(a, "\n", 1);
430 * Format a number into the specified field using base-8.
431 * NB: This version is slightly different from the one in
435 format_octal(int64_t v, char *p, int s)
443 /* Octal values can't be negative, so use 0. */
450 p += s; /* Start at the end and work backwards. */
452 *--p = (char)('0' + (v & 7));
454 } while (--s > 0 && v > 0);
457 memmove(h, p, len - s);
463 /* If it overflowed, fill field with max value. */
471 * Format a number into the specified field using base-10.
474 format_decimal(int64_t v, char *p, int s)
482 /* Negative values in ar header are meaningless , so use 0. */
491 *--p = (char)('0' + (v % 10));
493 } while (--s > 0 && v > 0);
496 memmove(h, p, len - s);
502 /* If it overflowed, fill field with max value. */
510 basename(const char *path)
512 const char *endp, *startp;
514 endp = path + strlen(path) - 1;
516 * For filename with trailing slash(es), we return
517 * NULL indicating an error.
522 /* Find the start of the base */
524 while (startp > path && *(startp - 1) != '/')