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("$FreeBSD$");
30 #ifdef HAVE_SYS_STAT_H
40 /* #include <stdint.h> */ /* See archive_platform.h */
49 #include "archive_entry.h"
50 #include "archive_private.h"
51 #include "archive_read_private.h"
52 #include "archive_string.h"
58 #define MTREE_HAS_DEVICE 0x0001
59 #define MTREE_HAS_FFLAGS 0x0002
60 #define MTREE_HAS_GID 0x0004
61 #define MTREE_HAS_GNAME 0x0008
62 #define MTREE_HAS_MTIME 0x0010
63 #define MTREE_HAS_NLINK 0x0020
64 #define MTREE_HAS_PERM 0x0040
65 #define MTREE_HAS_SIZE 0x0080
66 #define MTREE_HAS_TYPE 0x0100
67 #define MTREE_HAS_UID 0x0200
68 #define MTREE_HAS_UNAME 0x0400
70 #define MTREE_HAS_OPTIONAL 0x0800
73 struct mtree_option *next;
78 struct mtree_entry *next;
79 struct mtree_option *options;
86 struct archive_string line;
93 const char *archive_format_name;
94 struct mtree_entry *entries;
95 struct mtree_entry *this_entry;
96 struct archive_string current_dir;
97 struct archive_string contents_name;
99 struct archive_entry_linkresolver *resolver;
101 off_t cur_size, cur_offset;
104 static int cleanup(struct archive_read *);
105 static int mtree_bid(struct archive_read *);
106 static int parse_file(struct archive_read *, struct archive_entry *,
107 struct mtree *, struct mtree_entry *, int *);
108 static void parse_escapes(char *, struct mtree_entry *);
109 static int parse_line(struct archive_read *, struct archive_entry *,
110 struct mtree *, struct mtree_entry *, int *);
111 static int parse_keyword(struct archive_read *, struct mtree *,
112 struct archive_entry *, struct mtree_option *, int *);
113 static int read_data(struct archive_read *a,
114 const void **buff, size_t *size, off_t *offset);
115 static ssize_t readline(struct archive_read *, struct mtree *, char **, ssize_t);
116 static int skip(struct archive_read *a);
117 static int read_header(struct archive_read *,
118 struct archive_entry *);
119 static int64_t mtree_atol10(char **);
120 static int64_t mtree_atol8(char **);
121 static int64_t mtree_atol(char **);
124 free_options(struct mtree_option *head)
126 struct mtree_option *next;
128 for (; head != NULL; head = next) {
136 archive_read_support_format_mtree(struct archive *_a)
138 struct archive_read *a = (struct archive_read *)_a;
142 mtree = (struct mtree *)malloc(sizeof(*mtree));
144 archive_set_error(&a->archive, ENOMEM,
145 "Can't allocate mtree data");
146 return (ARCHIVE_FATAL);
148 memset(mtree, 0, sizeof(*mtree));
151 r = __archive_read_register_format(a, mtree, "mtree",
152 mtree_bid, NULL, read_header, read_data, skip, cleanup);
160 cleanup(struct archive_read *a)
163 struct mtree_entry *p, *q;
165 mtree = (struct mtree *)(a->format->data);
171 free_options(p->options);
175 archive_string_free(&mtree->line);
176 archive_string_free(&mtree->current_dir);
177 archive_string_free(&mtree->contents_name);
178 archive_entry_linkresolver_free(mtree->resolver);
182 (a->format->data) = NULL;
188 mtree_bid(struct archive_read *a)
190 const char *signature = "#mtree";
193 /* Now let's look at the actual header and see if it matches. */
194 p = __archive_read_ahead(a, strlen(signature), NULL);
198 if (strncmp(p, signature, strlen(signature)) == 0)
199 return (8 * strlen(signature));
204 * The extended mtree format permits multiple lines specifying
205 * attributes for each file. For those entries, only the last line
206 * is actually used. Practically speaking, that means we have
207 * to read the entire mtree file into memory up front.
209 * The parsing is done in two steps. First, it is decided if a line
210 * changes the global defaults and if it is, processed accordingly.
211 * Otherwise, the options of the line are merged with the current
215 add_option(struct archive_read *a, struct mtree_option **global,
216 const char *value, size_t len)
218 struct mtree_option *option;
220 if ((option = malloc(sizeof(*option))) == NULL) {
221 archive_set_error(&a->archive, errno, "Can't allocate memory");
222 return (ARCHIVE_FATAL);
224 if ((option->value = malloc(len + 1)) == NULL) {
226 archive_set_error(&a->archive, errno, "Can't allocate memory");
227 return (ARCHIVE_FATAL);
229 memcpy(option->value, value, len);
230 option->value[len] = '\0';
231 option->next = *global;
237 remove_option(struct mtree_option **global, const char *value, size_t len)
239 struct mtree_option *iter, *last;
242 for (iter = *global; iter != NULL; last = iter, iter = iter->next) {
243 if (strncmp(iter->value, value, len) == 0 &&
244 (iter->value[len] == '\0' ||
245 iter->value[len] == '='))
251 *global = iter->next;
253 last->next = iter->next;
260 process_global_set(struct archive_read *a,
261 struct mtree_option **global, const char *line)
263 const char *next, *eq;
269 next = line + strspn(line, " \t\r\n");
273 next = line + strcspn(line, " \t\r\n");
274 eq = strchr(line, '=');
280 remove_option(global, line, len);
281 r = add_option(a, global, line, next - line);
289 process_global_unset(struct archive_read *a,
290 struct mtree_option **global, const char *line)
296 if (strchr(line, '=') != NULL) {
297 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
298 "/unset shall not contain `='");
299 return ARCHIVE_FATAL;
303 next = line + strspn(line, " \t\r\n");
307 len = strcspn(line, " \t\r\n");
309 if (len == 3 && strncmp(line, "all", 3) == 0) {
310 free_options(*global);
313 remove_option(global, line, len);
321 process_add_entry(struct archive_read *a, struct mtree *mtree,
322 struct mtree_option **global, const char *line,
323 struct mtree_entry **last_entry)
325 struct mtree_entry *entry;
326 struct mtree_option *iter;
327 const char *next, *eq;
331 if ((entry = malloc(sizeof(*entry))) == NULL) {
332 archive_set_error(&a->archive, errno, "Can't allocate memory");
333 return (ARCHIVE_FATAL);
336 entry->options = NULL;
341 /* Add this entry to list. */
342 if (*last_entry == NULL)
343 mtree->entries = entry;
345 (*last_entry)->next = entry;
348 len = strcspn(line, " \t\r\n");
349 if ((entry->name = malloc(len + 1)) == NULL) {
350 archive_set_error(&a->archive, errno, "Can't allocate memory");
351 return (ARCHIVE_FATAL);
354 memcpy(entry->name, line, len);
355 entry->name[len] = '\0';
356 parse_escapes(entry->name, entry);
359 for (iter = *global; iter != NULL; iter = iter->next) {
360 r = add_option(a, &entry->options, iter->value,
361 strlen(iter->value));
367 next = line + strspn(line, " \t\r\n");
371 next = line + strcspn(line, " \t\r\n");
372 eq = strchr(line, '=');
378 remove_option(&entry->options, line, len);
379 r = add_option(a, &entry->options, line, next - line);
387 read_mtree(struct archive_read *a, struct mtree *mtree)
392 struct mtree_option *global;
393 struct mtree_entry *last_entry;
396 mtree->archive_format = ARCHIVE_FORMAT_MTREE;
397 mtree->archive_format_name = "mtree";
403 for (counter = 1; ; ++counter) {
404 len = readline(a, mtree, &p, 256);
406 mtree->this_entry = mtree->entries;
411 /* Leading whitespace is never significant, ignore it. */
412 while (*p == ' ' || *p == '\t') {
416 /* Skip content lines and blank lines. */
419 if (*p == '\r' || *p == '\n' || *p == '\0')
422 r = process_add_entry(a, mtree, &global, p,
424 } else if (strncmp(p, "/set", 4) == 0) {
425 if (p[4] != ' ' && p[4] != '\t')
427 r = process_global_set(a, &global, p);
428 } else if (strncmp(p, "/unset", 6) == 0) {
429 if (p[6] != ' ' && p[6] != '\t')
431 r = process_global_unset(a, &global, p);
439 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
440 "Can't parse line %ju", counter);
441 return ARCHIVE_FATAL;
445 * Read in the entire mtree file into memory on the first request.
446 * Then use the next unused file to satisfy each header request.
449 read_header(struct archive_read *a, struct archive_entry *entry)
455 mtree = (struct mtree *)(a->format->data);
457 if (mtree->fd >= 0) {
462 if (mtree->entries == NULL) {
463 mtree->resolver = archive_entry_linkresolver_new();
464 if (mtree->resolver == NULL)
465 return ARCHIVE_FATAL;
466 archive_entry_linkresolver_set_strategy(mtree->resolver,
467 ARCHIVE_FORMAT_MTREE);
468 r = read_mtree(a, mtree);
473 a->archive.archive_format = mtree->archive_format;
474 a->archive.archive_format_name = mtree->archive_format_name;
477 if (mtree->this_entry == NULL)
478 return (ARCHIVE_EOF);
479 if (strcmp(mtree->this_entry->name, "..") == 0) {
480 mtree->this_entry->used = 1;
481 if (archive_strlen(&mtree->current_dir) > 0) {
482 /* Roll back current path. */
483 p = mtree->current_dir.s
484 + mtree->current_dir.length - 1;
485 while (p >= mtree->current_dir.s && *p != '/')
487 if (p >= mtree->current_dir.s)
489 mtree->current_dir.length
490 = p - mtree->current_dir.s + 1;
493 if (!mtree->this_entry->used) {
495 r = parse_file(a, entry, mtree, mtree->this_entry, &use_next);
499 mtree->this_entry = mtree->this_entry->next;
504 * A single file can have multiple lines contribute specifications.
505 * Parse as many lines as necessary, then pull additional information
506 * from a backing file on disk as necessary.
509 parse_file(struct archive_read *a, struct archive_entry *entry,
510 struct mtree *mtree, struct mtree_entry *mentry, int *use_next)
513 struct stat st_storage, *st;
514 struct mtree_entry *mp;
515 struct archive_entry *sparse_entry;
516 int r = ARCHIVE_OK, r1, parsed_kws, mismatched_type;
520 /* Initialize reasonable defaults. */
521 mtree->filetype = AE_IFREG;
522 archive_entry_set_size(entry, 0);
524 /* Parse options from this line. */
526 r = parse_line(a, entry, mtree, mentry, &parsed_kws);
529 archive_entry_copy_pathname(entry, mentry->name);
531 * "Full" entries are allowed to have multiple lines
532 * and those lines aren't required to be adjacent. We
533 * don't support multiple lines for "relative" entries
534 * nor do we make any attempt to merge data from
535 * separate "relative" and "full" entries. (Merging
536 * "relative" and "full" entries would require dealing
537 * with pathname canonicalization, which is a very
540 for (mp = mentry->next; mp != NULL; mp = mp->next) {
541 if (mp->full && !mp->used
542 && strcmp(mentry->name, mp->name) == 0) {
543 /* Later lines override earlier ones. */
545 r1 = parse_line(a, entry, mtree, mp,
553 * Relative entries require us to construct
554 * the full path and possibly update the
557 size_t n = archive_strlen(&mtree->current_dir);
559 archive_strcat(&mtree->current_dir, "/");
560 archive_strcat(&mtree->current_dir, mentry->name);
561 archive_entry_copy_pathname(entry, mtree->current_dir.s);
562 if (archive_entry_filetype(entry) != AE_IFDIR)
563 mtree->current_dir.length = n;
567 * Try to open and stat the file to get the real size
568 * and other file info. It would be nice to avoid
569 * this here so that getting a listing of an mtree
570 * wouldn't require opening every referenced contents
571 * file. But then we wouldn't know the actual
572 * contents size, so I don't see a really viable way
573 * around this. (Also, we may want to someday pull
574 * other unspecified info from the contents file on
578 if (archive_strlen(&mtree->contents_name) > 0)
579 path = mtree->contents_name.s;
581 path = archive_entry_pathname(entry);
583 if (archive_entry_filetype(entry) == AE_IFREG ||
584 archive_entry_filetype(entry) == AE_IFDIR) {
585 mtree->fd = open(path,
586 O_RDONLY | O_BINARY);
587 if (mtree->fd == -1 &&
589 archive_strlen(&mtree->contents_name) > 0)) {
590 archive_set_error(&a->archive, errno,
591 "Can't open %s", path);
597 if (mtree->fd >= 0) {
598 if (fstat(mtree->fd, st) == -1) {
599 archive_set_error(&a->archive, errno,
600 "Could not fstat %s", path);
602 /* If we can't stat it, don't keep it open. */
607 } else if (lstat(path, st) == -1) {
612 * If there is a contents file on disk, use that size;
613 * otherwise leave it as-is (it might have been set from
614 * the mtree size= keyword).
618 if ((st->st_mode & S_IFMT) == S_IFREG &&
619 archive_entry_filetype(entry) != AE_IFREG)
621 if ((st->st_mode & S_IFMT) == S_IFLNK &&
622 archive_entry_filetype(entry) != AE_IFLNK)
624 if ((st->st_mode & S_IFSOCK) == S_IFSOCK &&
625 archive_entry_filetype(entry) != AE_IFSOCK)
627 if ((st->st_mode & S_IFMT) == S_IFCHR &&
628 archive_entry_filetype(entry) != AE_IFCHR)
630 if ((st->st_mode & S_IFMT) == S_IFBLK &&
631 archive_entry_filetype(entry) != AE_IFBLK)
633 if ((st->st_mode & S_IFMT) == S_IFDIR &&
634 archive_entry_filetype(entry) != AE_IFDIR)
636 if ((st->st_mode & S_IFMT) == S_IFIFO &&
637 archive_entry_filetype(entry) != AE_IFIFO)
640 if (mismatched_type) {
641 if ((parsed_kws & MTREE_HAS_OPTIONAL) == 0) {
642 archive_set_error(&a->archive,
644 "mtree specification has different type for %s",
645 archive_entry_pathname(entry));
650 /* Don't hold a non-regular file open. */
660 if ((parsed_kws & MTREE_HAS_DEVICE) == 0 &&
661 (archive_entry_filetype(entry) == AE_IFCHR ||
662 archive_entry_filetype(entry) == AE_IFBLK))
663 archive_entry_set_rdev(entry, st->st_rdev);
664 if ((parsed_kws & (MTREE_HAS_GID | MTREE_HAS_GNAME)) == 0)
665 archive_entry_set_gid(entry, st->st_gid);
666 if ((parsed_kws & (MTREE_HAS_UID | MTREE_HAS_UNAME)) == 0)
667 archive_entry_set_uid(entry, st->st_uid);
668 if ((parsed_kws & MTREE_HAS_MTIME) == 0) {
669 #if HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC
670 archive_entry_set_mtime(entry, st->st_mtime,
671 st->st_mtimespec.tv_nsec);
672 #elif HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
673 archive_entry_set_mtime(entry, st->st_mtime,
674 st->st_mtim.tv_nsec);
675 #elif HAVE_STRUCT_STAT_ST_MTIME_N
676 archive_entry_set_mtime(entry, st->st_mtime,
678 #elif HAVE_STRUCT_STAT_ST_UMTIME
679 archive_entry_set_mtime(entry, st->st_mtime,
681 #elif HAVE_STRUCT_STAT_ST_MTIME_USEC
682 archive_entry_set_mtime(entry, st->st_mtime,
683 st->st_mtime_usec*1000);
685 archive_entry_set_mtime(entry, st->st_mtime, 0);
688 if ((parsed_kws & MTREE_HAS_NLINK) == 0)
689 archive_entry_set_nlink(entry, st->st_nlink);
690 if ((parsed_kws & MTREE_HAS_PERM) == 0)
691 archive_entry_set_perm(entry, st->st_mode);
692 if ((parsed_kws & MTREE_HAS_SIZE) == 0)
693 archive_entry_set_size(entry, st->st_size);
694 archive_entry_set_ino(entry, st->st_ino);
695 archive_entry_set_dev(entry, st->st_dev);
697 archive_entry_linkify(mtree->resolver, &entry, &sparse_entry);
698 } else if (parsed_kws & MTREE_HAS_OPTIONAL) {
700 * Couldn't open the entry, stat it or the on-disk type
701 * didn't match. If this entry is optional, just ignore it
702 * and read the next header entry.
708 mtree->cur_size = archive_entry_size(entry);
715 * Each line contains a sequence of keywords.
718 parse_line(struct archive_read *a, struct archive_entry *entry,
719 struct mtree *mtree, struct mtree_entry *mp, int *parsed_kws)
721 struct mtree_option *iter;
722 int r = ARCHIVE_OK, r1;
724 for (iter = mp->options; iter != NULL; iter = iter->next) {
725 r1 = parse_keyword(a, mtree, entry, iter, parsed_kws);
729 if ((*parsed_kws & MTREE_HAS_TYPE) == 0) {
730 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
731 "Missing type keyword in mtree specification");
732 return (ARCHIVE_WARN);
738 * Device entries have one of the following forms:
740 * format,major,minor[,subdevice]
742 * Just use major and minor, no translation etc is done
746 parse_device(struct archive *a, struct archive_entry *entry, char *val)
748 char *comma1, *comma2;
750 comma1 = strchr(val, ',');
751 if (comma1 == NULL) {
752 archive_entry_set_dev(entry, mtree_atol10(&val));
756 comma2 = strchr(comma1, ',');
757 if (comma2 == NULL) {
758 archive_set_error(a, ARCHIVE_ERRNO_FILE_FORMAT,
759 "Malformed device attribute");
760 return (ARCHIVE_WARN);
763 archive_entry_set_rdevmajor(entry, mtree_atol(&comma1));
764 archive_entry_set_rdevminor(entry, mtree_atol(&comma2));
769 * Parse a single keyword and its value.
772 parse_keyword(struct archive_read *a, struct mtree *mtree,
773 struct archive_entry *entry, struct mtree_option *option, int *parsed_kws)
782 if (strcmp(key, "optional") == 0) {
783 *parsed_kws |= MTREE_HAS_OPTIONAL;
786 if (strcmp(key, "ignore") == 0) {
788 * The mtree processing is not recursive, so
789 * recursion will only happen for explicitly listed
795 val = strchr(key, '=');
797 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
798 "Malformed attribute \"%s\" (%d)", key, key[0]);
799 return (ARCHIVE_WARN);
807 if (strcmp(key, "content") == 0
808 || strcmp(key, "contents") == 0) {
809 parse_escapes(val, NULL);
810 archive_strcpy(&mtree->contents_name, val);
813 if (strcmp(key, "cksum") == 0)
816 if (strcmp(key, "device") == 0) {
817 *parsed_kws |= MTREE_HAS_DEVICE;
818 return parse_device(&a->archive, entry, val);
821 if (strcmp(key, "flags") == 0) {
822 *parsed_kws |= MTREE_HAS_FFLAGS;
823 archive_entry_copy_fflags_text(entry, val);
827 if (strcmp(key, "gid") == 0) {
828 *parsed_kws |= MTREE_HAS_GID;
829 archive_entry_set_gid(entry, mtree_atol10(&val));
832 if (strcmp(key, "gname") == 0) {
833 *parsed_kws |= MTREE_HAS_GNAME;
834 archive_entry_copy_gname(entry, val);
838 if (strcmp(key, "link") == 0) {
839 archive_entry_copy_symlink(entry, val);
843 if (strcmp(key, "md5") == 0 || strcmp(key, "md5digest") == 0)
845 if (strcmp(key, "mode") == 0) {
846 if (val[0] >= '0' && val[0] <= '9') {
847 *parsed_kws |= MTREE_HAS_PERM;
848 archive_entry_set_perm(entry,
851 archive_set_error(&a->archive,
852 ARCHIVE_ERRNO_FILE_FORMAT,
853 "Symbolic mode \"%s\" unsupported", val);
859 if (strcmp(key, "nlink") == 0) {
860 *parsed_kws |= MTREE_HAS_NLINK;
861 archive_entry_set_nlink(entry, mtree_atol10(&val));
865 if (strcmp(key, "rmd160") == 0 ||
866 strcmp(key, "rmd160digest") == 0)
869 if (strcmp(key, "sha1") == 0 || strcmp(key, "sha1digest") == 0)
871 if (strcmp(key, "sha256") == 0 ||
872 strcmp(key, "sha256digest") == 0)
874 if (strcmp(key, "sha384") == 0 ||
875 strcmp(key, "sha384digest") == 0)
877 if (strcmp(key, "sha512") == 0 ||
878 strcmp(key, "sha512digest") == 0)
880 if (strcmp(key, "size") == 0) {
881 archive_entry_set_size(entry, mtree_atol10(&val));
885 if (strcmp(key, "tags") == 0) {
887 * Comma delimited list of tags.
888 * Ignore the tags for now, but the interface
889 * should be extended to allow inclusion/exclusion.
893 if (strcmp(key, "time") == 0) {
894 *parsed_kws |= MTREE_HAS_MTIME;
895 archive_entry_set_mtime(entry, mtree_atol10(&val), 0);
898 if (strcmp(key, "type") == 0) {
899 *parsed_kws |= MTREE_HAS_TYPE;
902 if (strcmp(val, "block") == 0) {
903 mtree->filetype = AE_IFBLK;
907 if (strcmp(val, "char") == 0) {
908 mtree->filetype = AE_IFCHR;
912 if (strcmp(val, "dir") == 0) {
913 mtree->filetype = AE_IFDIR;
917 if (strcmp(val, "fifo") == 0) {
918 mtree->filetype = AE_IFIFO;
921 if (strcmp(val, "file") == 0) {
922 mtree->filetype = AE_IFREG;
926 if (strcmp(val, "link") == 0) {
927 mtree->filetype = AE_IFLNK;
931 archive_set_error(&a->archive,
932 ARCHIVE_ERRNO_FILE_FORMAT,
933 "Unrecognized file type \"%s\"", val);
934 return (ARCHIVE_WARN);
936 archive_entry_set_filetype(entry, mtree->filetype);
940 if (strcmp(key, "uid") == 0) {
941 *parsed_kws |= MTREE_HAS_UID;
942 archive_entry_set_uid(entry, mtree_atol10(&val));
945 if (strcmp(key, "uname") == 0) {
946 *parsed_kws |= MTREE_HAS_UNAME;
947 archive_entry_copy_uname(entry, val);
951 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
952 "Unrecognized key %s=%s", key, val);
953 return (ARCHIVE_WARN);
959 read_data(struct archive_read *a, const void **buff, size_t *size, off_t *offset)
961 size_t bytes_to_read;
965 mtree = (struct mtree *)(a->format->data);
970 return (ARCHIVE_EOF);
972 if (mtree->buff == NULL) {
973 mtree->buffsize = 64 * 1024;
974 mtree->buff = malloc(mtree->buffsize);
975 if (mtree->buff == NULL) {
976 archive_set_error(&a->archive, ENOMEM,
977 "Can't allocate memory");
979 return (ARCHIVE_FATAL);
983 *offset = mtree->offset;
984 if ((off_t)mtree->buffsize > mtree->cur_size - mtree->offset)
985 bytes_to_read = mtree->cur_size - mtree->offset;
987 bytes_to_read = mtree->buffsize;
988 bytes_read = read(mtree->fd, mtree->buff, bytes_to_read);
989 if (bytes_read < 0) {
990 archive_set_error(&a->archive, errno, "Can't read");
991 return (ARCHIVE_WARN);
993 if (bytes_read == 0) {
995 return (ARCHIVE_EOF);
997 mtree->offset += bytes_read;
1002 /* Skip does nothing except possibly close the contents file. */
1004 skip(struct archive_read *a)
1006 struct mtree *mtree;
1008 mtree = (struct mtree *)(a->format->data);
1009 if (mtree->fd >= 0) {
1013 return (ARCHIVE_OK);
1017 * Since parsing backslash sequences always makes strings shorter,
1018 * we can always do this conversion in-place.
1021 parse_escapes(char *src, struct mtree_entry *mentry)
1027 * The current directory is somewhat special, it should be archived
1028 * only once as it will confuse extraction otherwise.
1030 if (strcmp(src, ".") == 0)
1033 while (*src != '\0') {
1035 if (c == '/' && mentry != NULL)
1040 if (src[1] < '0' || src[1] > '7') {
1049 if (src[1] >= '0' && src[1] <= '7' &&
1050 src[2] >= '0' && src[2] <= '7') {
1051 c = (src[0] - '0') << 6;
1052 c |= (src[1] - '0') << 3;
1053 c |= (src[2] - '0');
1097 * Note that this implementation does not (and should not!) obey
1098 * locale settings; you cannot simply substitute strtol here, since
1099 * it does obey locale.
1102 mtree_atol8(char **p)
1104 int64_t l, limit, last_digit_limit;
1108 limit = INT64_MAX / base;
1109 last_digit_limit = INT64_MAX % base;
1113 while (digit >= 0 && digit < base) {
1114 if (l>limit || (l == limit && digit > last_digit_limit)) {
1115 l = INT64_MAX; /* Truncate on overflow. */
1118 l = (l * base) + digit;
1119 digit = *++(*p) - '0';
1125 * Note that this implementation does not (and should not!) obey
1126 * locale settings; you cannot simply substitute strtol here, since
1127 * it does obey locale.
1130 mtree_atol10(char **p)
1132 int64_t l, limit, last_digit_limit;
1133 int base, digit, sign;
1136 limit = INT64_MAX / base;
1137 last_digit_limit = INT64_MAX % base;
1147 while (digit >= 0 && digit < base) {
1148 if (l > limit || (l == limit && digit > last_digit_limit)) {
1149 l = UINT64_MAX; /* Truncate on overflow. */
1152 l = (l * base) + digit;
1153 digit = *++(*p) - '0';
1155 return (sign < 0) ? -l : l;
1159 * Note that this implementation does not (and should not!) obey
1160 * locale settings; you cannot simply substitute strtol here, since
1161 * it does obey locale.
1164 mtree_atol16(char **p)
1166 int64_t l, limit, last_digit_limit;
1167 int base, digit, sign;
1170 limit = INT64_MAX / base;
1171 last_digit_limit = INT64_MAX % base;
1180 if (**p >= '0' && **p <= '9')
1182 else if (**p >= 'a' && **p <= 'f')
1183 digit = **p - 'a' + 10;
1184 else if (**p >= 'A' && **p <= 'F')
1185 digit = **p - 'A' + 10;
1188 while (digit >= 0 && digit < base) {
1189 if (l > limit || (l == limit && digit > last_digit_limit)) {
1190 l = UINT64_MAX; /* Truncate on overflow. */
1193 l = (l * base) + digit;
1194 if (**p >= '0' && **p <= '9')
1196 else if (**p >= 'a' && **p <= 'f')
1197 digit = **p - 'a' + 10;
1198 else if (**p >= 'A' && **p <= 'F')
1199 digit = **p - 'A' + 10;
1203 return (sign < 0) ? -l : l;
1207 mtree_atol(char **p)
1210 return mtree_atol10(p);
1211 if ((*p)[1] == 'x' || (*p)[1] == 'X') {
1213 return mtree_atol16(p);
1215 return mtree_atol8(p);
1219 * Returns length of line (including trailing newline)
1220 * or negative on error. 'start' argument is updated to
1221 * point to first character of line.
1224 readline(struct archive_read *a, struct mtree *mtree, char **start, ssize_t limit)
1227 ssize_t total_size = 0;
1233 /* Accumulate line in a line buffer. */
1235 /* Read some more. */
1236 t = __archive_read_ahead(a, 1, &bytes_read);
1240 return (ARCHIVE_FATAL);
1241 s = t; /* Start of line? */
1242 p = memchr(t, '\n', bytes_read);
1243 /* If we found '\n', trim the read. */
1245 bytes_read = 1 + ((const char *)p) - s;
1247 if (total_size + bytes_read + 1 > limit) {
1248 archive_set_error(&a->archive,
1249 ARCHIVE_ERRNO_FILE_FORMAT,
1251 return (ARCHIVE_FATAL);
1253 if (archive_string_ensure(&mtree->line,
1254 total_size + bytes_read + 1) == NULL) {
1255 archive_set_error(&a->archive, ENOMEM,
1256 "Can't allocate working buffer");
1257 return (ARCHIVE_FATAL);
1259 memcpy(mtree->line.s + total_size, t, bytes_read);
1260 __archive_read_consume(a, bytes_read);
1261 total_size += bytes_read;
1262 /* Null terminate. */
1263 mtree->line.s[total_size] = '\0';
1264 /* If we found an unescaped '\n', clean up and return. */
1267 for (u = mtree->line.s; *u; ++u) {
1269 *start = mtree->line.s;
1275 *start = mtree->line.s;
1286 total_size - (u - mtree->line.s) + 1);