summaryrefslogtreecommitdiff
path: root/include/unarchive.h
blob: 17a46b6d70fd76008b5c1df9d4cb3922bfec3302 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
/* vi: set sw=4 ts=4: */
#ifndef	__UNARCHIVE_H__
#define	__UNARCHIVE_H__

#if __GNUC_PREREQ(4,1)
# pragma GCC visibility push(hidden)
#endif

#define ARCHIVE_PRESERVE_DATE           1
#define ARCHIVE_CREATE_LEADING_DIRS     2
#define ARCHIVE_EXTRACT_UNCONDITIONAL   4
#define ARCHIVE_EXTRACT_QUIET           8
#define ARCHIVE_EXTRACT_NEWER           16
#define ARCHIVE_NOPRESERVE_OWN          32
#define ARCHIVE_NOPRESERVE_PERM         64

typedef struct file_header_t {
	char *name;
	char *link_target;
#if ENABLE_FEATURE_TAR_UNAME_GNAME
	char *uname;
	char *gname;
#endif
	off_t size;
	uid_t uid;
	gid_t gid;
	mode_t mode;
	time_t mtime;
	dev_t device;
} file_header_t;

typedef struct archive_handle_t {
	/* Define if the header and data component should be processed */
	char FAST_FUNC (*filter)(struct archive_handle_t *);
	llist_t *accept;
	/* List of files that have been rejected */
	llist_t *reject;
	/* List of files that have successfully been worked on */
	llist_t *passed;

	/* Contains the processed header entry */
	file_header_t *file_header;

	/* Process the header component, e.g. tar -t */
	void FAST_FUNC (*action_header)(const file_header_t *);

	/* Process the data component, e.g. extract to filesystem */
	void FAST_FUNC (*action_data)(struct archive_handle_t *);

#if ENABLE_DPKG || ENABLE_DPKG_DEB
	/* "subarchive" is used only by dpkg[-deb] applets */
	/* How to process any sub archive, e.g. get_header_tar_gz */
	char FAST_FUNC (*action_data_subarchive)(struct archive_handle_t *);
	/* Contains the handle to a sub archive */
	struct archive_handle_t *sub_archive;
#endif

	/* The raw stream as read from disk or stdin */
	int src_fd;

	/* Count the number of bytes processed */
	off_t offset;

	/* Function that skips data: read_by_char or read_by_skip */
	void FAST_FUNC (*seek)(const struct archive_handle_t *archive_handle, const unsigned amount);

	/* Temporary storage */
	char *buffer;

	/* Flags and misc. stuff */
	unsigned char ah_flags;

	/* "Private" storage for archivers */
//	unsigned char ah_priv_inited;
	void *ah_priv[8];

} archive_handle_t;


extern archive_handle_t *init_handle(void) FAST_FUNC;

extern char filter_accept_all(archive_handle_t *archive_handle) FAST_FUNC;
extern char filter_accept_list(archive_handle_t *archive_handle) FAST_FUNC;
extern char filter_accept_list_reassign(archive_handle_t *archive_handle) FAST_FUNC;
extern char filter_accept_reject_list(archive_handle_t *archive_handle) FAST_FUNC;

extern void unpack_ar_archive(archive_handle_t *ar_archive) FAST_FUNC;

extern void data_skip(archive_handle_t *archive_handle) FAST_FUNC;
extern void data_extract_all(archive_handle_t *archive_handle) FAST_FUNC;
extern void data_extract_to_stdout(archive_handle_t *archive_handle) FAST_FUNC;
extern void data_extract_to_buffer(archive_handle_t *archive_handle) FAST_FUNC;

extern void header_skip(const file_header_t *file_header) FAST_FUNC;
extern void header_list(const file_header_t *file_header) FAST_FUNC;
extern void header_verbose_list(const file_header_t *file_header) FAST_FUNC;

extern char get_header_ar(archive_handle_t *archive_handle) FAST_FUNC;
extern char get_header_cpio(archive_handle_t *archive_handle) FAST_FUNC;
extern char get_header_tar(archive_handle_t *archive_handle) FAST_FUNC;
extern char get_header_tar_bz2(archive_handle_t *archive_handle) FAST_FUNC;
extern char get_header_tar_lzma(archive_handle_t *archive_handle) FAST_FUNC;
extern char get_header_tar_gz(archive_handle_t *archive_handle) FAST_FUNC;

extern void seek_by_jump(const archive_handle_t *archive_handle, unsigned amount) FAST_FUNC;
extern void seek_by_read(const archive_handle_t *archive_handle, unsigned amount) FAST_FUNC;

extern ssize_t archive_xread_all_eof(archive_handle_t *archive_handle, unsigned char *buf, size_t count) FAST_FUNC;

extern void data_align(archive_handle_t *archive_handle, unsigned boundary) FAST_FUNC;
extern const llist_t *find_list_entry(const llist_t *list, const char *filename) FAST_FUNC;
extern const llist_t *find_list_entry2(const llist_t *list, const char *filename) FAST_FUNC;

/* A bit of bunzip2 internals are exposed for compressed help support: */
typedef struct bunzip_data bunzip_data;
int start_bunzip(bunzip_data **bdp, int in_fd, const unsigned char *inbuf, int len) FAST_FUNC;
int read_bunzip(bunzip_data *bd, char *outbuf, int len) FAST_FUNC;
void dealloc_bunzip(bunzip_data *bd) FAST_FUNC;

typedef struct inflate_unzip_result {
	off_t bytes_out;
	uint32_t crc;
} inflate_unzip_result;

extern USE_DESKTOP(long long) int unpack_bz2_stream(int src_fd, int dst_fd) FAST_FUNC;
extern USE_DESKTOP(long long) int inflate_unzip(inflate_unzip_result *res, off_t compr_size, int src_fd, int dst_fd) FAST_FUNC;
extern USE_DESKTOP(long long) int unpack_gz_stream(int src_fd, int dst_fd) FAST_FUNC;
extern USE_DESKTOP(long long) int unpack_lzma_stream(int src_fd, int dst_fd) FAST_FUNC;

#if BB_MMU
extern void open_transformer(int fd,
	USE_DESKTOP(long long) int FAST_FUNC (*transformer)(int src_fd, int dst_fd)) FAST_FUNC;
#define open_transformer(fd, transformer, transform_prog) open_transformer(fd, transformer)
#else
extern void open_transformer(int src_fd, const char *transform_prog) FAST_FUNC;
#define open_transformer(fd, transformer, transform_prog) open_transformer(fd, transform_prog)
#endif

#if __GNUC_PREREQ(4,1)
# pragma GCC visibility pop
#endif

#endif