2 * Copyright (c) 2003-2007 Tim Kientzle
3 * Copyright (c) 2008 Joerg Sonnenberger
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: src/lib/libarchive/archive_write_set_format_shar.c,v 1.20 2008/08/31 07:10:40 kientzle Exp $");
42 #include "archive_entry.h"
43 #include "archive_private.h"
44 #include "archive_write_private.h"
49 struct archive_entry
*entry
;
53 /* Line buffer for uuencoded dump format */
58 struct archive_string work
;
59 struct archive_string quoted_name
;
62 static int archive_write_shar_finish(struct archive_write
*);
63 static int archive_write_shar_destroy(struct archive_write
*);
64 static int archive_write_shar_header(struct archive_write
*,
65 struct archive_entry
*);
66 static ssize_t
archive_write_shar_data_sed(struct archive_write
*,
67 const void * buff
, size_t);
68 static ssize_t
archive_write_shar_data_uuencode(struct archive_write
*,
69 const void * buff
, size_t);
70 static int archive_write_shar_finish_entry(struct archive_write
*);
73 * Copy the given string to the buffer, quoting all shell meta characters
77 shar_quote(struct archive_string
*buf
, const char *str
, int in_shell
)
79 static const char meta
[] = "\n \t'`\";&<>()|*?{}[]\\$!#^~";
82 while (*str
!= '\0') {
83 if ((len
= strcspn(str
, meta
)) != 0) {
84 archive_strncat(buf
, str
, len
);
86 } else if (*str
== '\n') {
88 archive_strcat(buf
, "\"\n\"");
90 archive_strcat(buf
, "\\n");
93 archive_strappend_char(buf
, '\\');
94 archive_strappend_char(buf
, *str
);
101 * Set output format to 'shar' format.
104 archive_write_set_format_shar(struct archive
*_a
)
106 struct archive_write
*a
= (struct archive_write
*)_a
;
109 /* If someone else was already registered, unregister them. */
110 if (a
->format_destroy
!= NULL
)
111 (a
->format_destroy
)(a
);
113 shar
= (struct shar
*)malloc(sizeof(*shar
));
115 archive_set_error(&a
->archive
, ENOMEM
, "Can't allocate shar data");
116 return (ARCHIVE_FATAL
);
118 memset(shar
, 0, sizeof(*shar
));
119 archive_string_init(&shar
->work
);
120 archive_string_init(&shar
->quoted_name
);
121 a
->format_data
= shar
;
123 a
->pad_uncompressed
= 0;
124 a
->format_name
= "shar";
125 a
->format_write_header
= archive_write_shar_header
;
126 a
->format_finish
= archive_write_shar_finish
;
127 a
->format_destroy
= archive_write_shar_destroy
;
128 a
->format_write_data
= archive_write_shar_data_sed
;
129 a
->format_finish_entry
= archive_write_shar_finish_entry
;
130 a
->archive
.archive_format
= ARCHIVE_FORMAT_SHAR_BASE
;
131 a
->archive
.archive_format_name
= "shar";
136 * An alternate 'shar' that uses uudecode instead of 'sed' to encode
137 * file contents and can therefore be used to archive binary files.
138 * In addition, this variant also attempts to restore ownership, file modes,
139 * and other extended file information.
142 archive_write_set_format_shar_dump(struct archive
*_a
)
144 struct archive_write
*a
= (struct archive_write
*)_a
;
147 archive_write_set_format_shar(&a
->archive
);
148 shar
= (struct shar
*)a
->format_data
;
150 a
->format_write_data
= archive_write_shar_data_uuencode
;
151 a
->archive
.archive_format
= ARCHIVE_FORMAT_SHAR_DUMP
;
152 a
->archive
.archive_format_name
= "shar dump";
157 archive_write_shar_header(struct archive_write
*a
, struct archive_entry
*entry
)
159 const char *linkname
;
164 shar
= (struct shar
*)a
->format_data
;
165 if (!shar
->wrote_header
) {
166 archive_strcat(&shar
->work
, "#!/bin/sh\n");
167 archive_strcat(&shar
->work
, "# This is a shell archive\n");
168 shar
->wrote_header
= 1;
171 /* Save the entry for the closing. */
173 archive_entry_free(shar
->entry
);
174 shar
->entry
= archive_entry_clone(entry
);
175 name
= archive_entry_pathname(entry
);
177 /* Handle some preparatory issues. */
178 switch(archive_entry_filetype(entry
)) {
180 /* Only regular files have non-zero size. */
183 archive_entry_set_size(entry
, 0);
184 /* Don't bother trying to recreate '.' */
185 if (strcmp(name
, ".") == 0 || strcmp(name
, "./") == 0)
191 /* All other file types have zero size in the archive. */
192 archive_entry_set_size(entry
, 0);
195 archive_entry_set_size(entry
, 0);
196 if (archive_entry_hardlink(entry
) == NULL
&&
197 archive_entry_symlink(entry
) == NULL
) {
198 archive_set_error(&a
->archive
, ARCHIVE_ERRNO_MISC
,
199 "shar format cannot archive this");
200 return (ARCHIVE_WARN
);
204 archive_string_empty(&shar
->quoted_name
);
205 shar_quote(&shar
->quoted_name
, name
, 1);
207 /* Stock preparation for all file types. */
208 archive_string_sprintf(&shar
->work
, "echo x %s\n", shar
->quoted_name
.s
);
210 if (archive_entry_filetype(entry
) != AE_IFDIR
) {
211 /* Try to create the dir. */
213 pp
= strrchr(p
, '/');
214 /* If there is a / character, try to create the dir. */
218 /* Try to avoid a lot of redundant mkdir commands. */
219 if (strcmp(p
, ".") == 0) {
220 /* Don't try to "mkdir ." */
222 } else if (shar
->last_dir
== NULL
) {
223 archive_strcat(&shar
->work
, "mkdir -p ");
224 shar_quote(&shar
->work
, p
, 1);
225 archive_strcat(&shar
->work
,
226 " > /dev/null 2>&1\n");
228 } else if (strcmp(p
, shar
->last_dir
) == 0) {
229 /* We've already created this exact dir. */
231 } else if (strlen(p
) < strlen(shar
->last_dir
) &&
232 strncmp(p
, shar
->last_dir
, strlen(p
)) == 0) {
233 /* We've already created a subdir. */
236 archive_strcat(&shar
->work
, "mkdir -p ");
237 shar_quote(&shar
->work
, p
, 1);
238 archive_strcat(&shar
->work
,
239 " > /dev/null 2>&1\n");
247 /* Handle file-type specific issues. */
249 if ((linkname
= archive_entry_hardlink(entry
)) != NULL
) {
250 archive_strcat(&shar
->work
, "ln -f ");
251 shar_quote(&shar
->work
, linkname
, 1);
252 archive_string_sprintf(&shar
->work
, " %s\n",
253 shar
->quoted_name
.s
);
254 } else if ((linkname
= archive_entry_symlink(entry
)) != NULL
) {
255 archive_strcat(&shar
->work
, "ln -fs ");
256 shar_quote(&shar
->work
, linkname
, 1);
257 archive_string_sprintf(&shar
->work
, " %s\n",
258 shar
->quoted_name
.s
);
260 switch(archive_entry_filetype(entry
)) {
262 if (archive_entry_size(entry
) == 0) {
263 /* More portable than "touch." */
264 archive_string_sprintf(&shar
->work
,
265 "test -e \"%s\" || :> \"%s\"\n",
266 shar
->quoted_name
.s
, shar
->quoted_name
.s
);
269 archive_string_sprintf(&shar
->work
,
270 "uudecode -p > %s << 'SHAR_END'\n",
271 shar
->quoted_name
.s
);
272 archive_string_sprintf(&shar
->work
,
274 archive_entry_mode(entry
) & 0777);
275 shar_quote(&shar
->work
, name
, 0);
276 archive_strcat(&shar
->work
, "\n");
278 archive_string_sprintf(&shar
->work
,
279 "sed 's/^X//' > %s << 'SHAR_END'\n",
280 shar
->quoted_name
.s
);
283 shar
->end_of_line
= 1;
288 archive_string_sprintf(&shar
->work
,
289 "mkdir -p %s > /dev/null 2>&1\n",
290 shar
->quoted_name
.s
);
291 /* Record that we just created this directory. */
292 if (shar
->last_dir
!= NULL
)
293 free(shar
->last_dir
);
295 shar
->last_dir
= strdup(name
);
296 /* Trim a trailing '/'. */
297 pp
= strrchr(shar
->last_dir
, '/');
298 if (pp
!= NULL
&& pp
[1] == '\0')
301 * TODO: Put dir name/mode on a list to be fixed
302 * up at end of archive.
306 archive_string_sprintf(&shar
->work
,
307 "mkfifo %s\n", shar
->quoted_name
.s
);
310 archive_string_sprintf(&shar
->work
,
311 "mknod %s c %d %d\n", shar
->quoted_name
.s
,
312 archive_entry_rdevmajor(entry
),
313 archive_entry_rdevminor(entry
));
316 archive_string_sprintf(&shar
->work
,
317 "mknod %s b %d %d\n", shar
->quoted_name
.s
,
318 archive_entry_rdevmajor(entry
),
319 archive_entry_rdevminor(entry
));
322 return (ARCHIVE_WARN
);
330 archive_write_shar_data_sed(struct archive_write
*a
, const void *buff
, size_t n
)
332 static const size_t ensured
= 65533;
339 shar
= (struct shar
*)a
->format_data
;
340 if (!shar
->has_data
|| n
== 0)
343 src
= (const char *)buff
;
346 * ensure is the number of bytes in buffer before expanding the
347 * current character. Each operation writes the current character
348 * and optionally the start-of-new-line marker. This can happen
349 * twice before entering the loop, so make sure three additional
350 * bytes can be written.
352 if (archive_string_ensure(&shar
->work
, ensured
+ 3) == NULL
)
353 __archive_errx(1, "Out of memory");
355 if (shar
->work
.length
> ensured
) {
356 ret
= (*a
->compressor
.write
)(a
, shar
->work
.s
,
358 if (ret
!= ARCHIVE_OK
)
359 return (ARCHIVE_FATAL
);
360 archive_string_empty(&shar
->work
);
362 buf
= shar
->work
.s
+ shar
->work
.length
;
363 buf_end
= shar
->work
.s
+ ensured
;
365 if (shar
->end_of_line
) {
367 shar
->end_of_line
= 0;
371 if ((*buf
++ = *src
++) == '\n') {
373 shar
->end_of_line
= 1;
378 if (buf
>= buf_end
) {
379 shar
->work
.length
= buf
- shar
->work
.s
;
380 ret
= (*a
->compressor
.write
)(a
, shar
->work
.s
,
382 if (ret
!= ARCHIVE_OK
)
383 return (ARCHIVE_FATAL
);
384 archive_string_empty(&shar
->work
);
389 shar
->work
.length
= buf
- shar
->work
.s
;
394 #define UUENC(c) (((c)!=0) ? ((c) & 077) + ' ': '`')
397 uuencode_group(const char _in
[3], char out
[4])
399 const unsigned char *in
= (const unsigned char *)_in
;
402 t
= (in
[0] << 16) | (in
[1] << 8) | in
[2];
403 out
[0] = UUENC( 0x3f & (t
>> 18) );
404 out
[1] = UUENC( 0x3f & (t
>> 12) );
405 out
[2] = UUENC( 0x3f & (t
>> 6) );
406 out
[3] = UUENC( 0x3f & t
);
410 uuencode_line(struct shar
*shar
, const char *inbuf
, size_t len
)
412 char tmp_buf
[3], *buf
;
415 /* len <= 45 -> expanded to 60 + len byte + new line */
416 alloc_len
= shar
->work
.length
+ 62;
417 if (archive_string_ensure(&shar
->work
, alloc_len
) == NULL
)
418 __archive_errx(1, "Out of memory");
420 buf
= shar
->work
.s
+ shar
->work
.length
;
423 uuencode_group(inbuf
, buf
);
429 tmp_buf
[0] = inbuf
[0];
433 tmp_buf
[1] = inbuf
[1];
435 uuencode_group(inbuf
, buf
);
439 if ((buf
- shar
->work
.s
) > (ptrdiff_t)(shar
->work
.length
+ 62))
440 __archive_errx(1, "Buffer overflow");
441 shar
->work
.length
= buf
- shar
->work
.s
;
445 archive_write_shar_data_uuencode(struct archive_write
*a
, const void *buff
,
453 shar
= (struct shar
*)a
->format_data
;
456 src
= (const char *)buff
;
458 if (shar
->outpos
!= 0) {
459 n
= 45 - shar
->outpos
;
462 memcpy(shar
->outbuff
+ shar
->outpos
, src
, n
);
463 if (shar
->outpos
+ n
< 45) {
467 uuencode_line(shar
, shar
->outbuff
, 45);
475 uuencode_line(shar
, src
, 45);
479 if (shar
->work
.length
< 65536)
481 ret
= (*a
->compressor
.write
)(a
, shar
->work
.s
,
483 if (ret
!= ARCHIVE_OK
)
484 return (ARCHIVE_FATAL
);
485 archive_string_empty(&shar
->work
);
488 memcpy(shar
->outbuff
, src
, n
);
495 archive_write_shar_finish_entry(struct archive_write
*a
)
497 const char *g
, *p
, *u
;
501 shar
= (struct shar
*)a
->format_data
;
502 if (shar
->entry
== NULL
)
506 /* Finish uuencoded data. */
507 if (shar
->has_data
) {
508 if (shar
->outpos
> 0)
509 uuencode_line(shar
, shar
->outbuff
,
511 archive_strcat(&shar
->work
, "`\nend\n");
512 archive_strcat(&shar
->work
, "SHAR_END\n");
514 /* Restore file mode, owner, flags. */
516 * TODO: Don't immediately restore mode for
517 * directories; defer that to end of script.
519 archive_string_sprintf(&shar
->work
, "chmod %o ",
520 archive_entry_mode(shar
->entry
) & 07777);
521 shar_quote(&shar
->work
, archive_entry_pathname(shar
->entry
), 1);
522 archive_strcat(&shar
->work
, "\n");
524 u
= archive_entry_uname(shar
->entry
);
525 g
= archive_entry_gname(shar
->entry
);
526 if (u
!= NULL
|| g
!= NULL
) {
527 archive_strcat(&shar
->work
, "chown ");
529 shar_quote(&shar
->work
, u
, 1);
531 archive_strcat(&shar
->work
, ":");
532 shar_quote(&shar
->work
, g
, 1);
534 shar_quote(&shar
->work
,
535 archive_entry_pathname(shar
->entry
), 1);
536 archive_strcat(&shar
->work
, "\n");
539 if ((p
= archive_entry_fflags_text(shar
->entry
)) != NULL
) {
540 archive_string_sprintf(&shar
->work
, "chflags %s ",
541 p
, archive_entry_pathname(shar
->entry
));
542 shar_quote(&shar
->work
,
543 archive_entry_pathname(shar
->entry
), 1);
544 archive_strcat(&shar
->work
, "\n");
547 /* TODO: restore ACLs */
550 if (shar
->has_data
) {
551 /* Finish sed-encoded data: ensure last line ends. */
552 if (!shar
->end_of_line
)
553 archive_strappend_char(&shar
->work
, '\n');
554 archive_strcat(&shar
->work
, "SHAR_END\n");
558 archive_entry_free(shar
->entry
);
561 if (shar
->work
.length
< 65536)
564 ret
= (*a
->compressor
.write
)(a
, shar
->work
.s
, shar
->work
.length
);
565 if (ret
!= ARCHIVE_OK
)
566 return (ARCHIVE_FATAL
);
567 archive_string_empty(&shar
->work
);
573 archive_write_shar_finish(struct archive_write
*a
)
579 * TODO: Accumulate list of directory names/modes and
580 * fix them all up at end-of-archive.
583 shar
= (struct shar
*)a
->format_data
;
586 * Only write the end-of-archive markers if the archive was
587 * actually started. This avoids problems if someone sets
588 * shar format, then sets another format (which would invoke
589 * shar_finish to free the format-specific data).
591 if (shar
->wrote_header
== 0)
594 archive_strcat(&shar
->work
, "exit\n");
596 ret
= (*a
->compressor
.write
)(a
, shar
->work
.s
, shar
->work
.length
);
597 if (ret
!= ARCHIVE_OK
)
598 return (ARCHIVE_FATAL
);
600 /* Shar output is never padded. */
601 archive_write_set_bytes_in_last_block(&a
->archive
, 1);
603 * TODO: shar should also suppress padding of
604 * uncompressed data within gzip/bzip2 streams.
611 archive_write_shar_destroy(struct archive_write
*a
)
615 shar
= (struct shar
*)a
->format_data
;
619 archive_entry_free(shar
->entry
);
620 free(shar
->last_dir
);
621 archive_string_free(&(shar
->work
));
622 archive_string_free(&(shar
->quoted_name
));
624 a
->format_data
= NULL
;