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    Contents of /tags/mkinitrd-6_1_11/busybox/include/unarchive.h

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    Revision 928 - (show annotations) (download)
    Wed Oct 28 13:31:19 2009 UTC (14 years, 7 months ago) by niro
    File MIME type: text/plain
    File size: 5978 byte(s) 
    tagged 'mkinitrd-6_1_11'
    1 /* vi: set sw=4 ts=4: */
    2 #ifndef __UNARCHIVE_H__
    3 #define __UNARCHIVE_H__
    4
    5 #if __GNUC_PREREQ(4,1)
    6 # pragma GCC visibility push(hidden)
    7 #endif
    8
    9 #define ARCHIVE_PRESERVE_DATE 1
    10 #define ARCHIVE_CREATE_LEADING_DIRS 2
    11 #define ARCHIVE_EXTRACT_UNCONDITIONAL 4
    12 #define ARCHIVE_EXTRACT_QUIET 8
    13 #define ARCHIVE_EXTRACT_NEWER 16
    14 #define ARCHIVE_NOPRESERVE_OWN 32
    15 #define ARCHIVE_NOPRESERVE_PERM 64
    16
    17 typedef struct file_header_t {
    18 char *name;
    19 char *link_target;
    20 #if ENABLE_FEATURE_TAR_UNAME_GNAME
    21 char *uname;
    22 char *gname;
    23 #endif
    24 off_t size;
    25 uid_t uid;
    26 gid_t gid;
    27 mode_t mode;
    28 time_t mtime;
    29 dev_t device;
    30 } file_header_t;
    31
    32 typedef struct archive_handle_t {
    33 /* Define if the header and data component should be processed */
    34 char FAST_FUNC (*filter)(struct archive_handle_t *);
    35 llist_t *accept;
    36 /* List of files that have been rejected */
    37 llist_t *reject;
    38 /* List of files that have successfully been worked on */
    39 llist_t *passed;
    40
    41 /* Contains the processed header entry */
    42 file_header_t *file_header;
    43
    44 /* Process the header component, e.g. tar -t */
    45 void FAST_FUNC (*action_header)(const file_header_t *);
    46
    47 /* Process the data component, e.g. extract to filesystem */
    48 void FAST_FUNC (*action_data)(struct archive_handle_t *);
    49
    50 #if ENABLE_DPKG || ENABLE_DPKG_DEB
    51 /* "subarchive" is used only by dpkg[-deb] applets */
    52 /* How to process any sub archive, e.g. get_header_tar_gz */
    53 char FAST_FUNC (*action_data_subarchive)(struct archive_handle_t *);
    54 /* Contains the handle to a sub archive */
    55 struct archive_handle_t *sub_archive;
    56 #endif
    57
    58 /* The raw stream as read from disk or stdin */
    59 int src_fd;
    60
    61 /* Count the number of bytes processed */
    62 off_t offset;
    63
    64 /* Function that skips data: read_by_char or read_by_skip */
    65 void FAST_FUNC (*seek)(const struct archive_handle_t *archive_handle, const unsigned amount);
    66
    67 /* Temporary storage */
    68 char *buffer;
    69
    70 /* Flags and misc. stuff */
    71 unsigned char ah_flags;
    72
    73 /* "Private" storage for archivers */
    74 // unsigned char ah_priv_inited;
    75 void *ah_priv[8];
    76
    77 } archive_handle_t;
    78
    79
    80 /* Info struct unpackers can fill out to inform users of thing like
    81 * timestamps of unpacked files */
    82 typedef struct unpack_info_t {
    83 time_t mtime;
    84 } unpack_info_t;
    85
    86 extern archive_handle_t *init_handle(void) FAST_FUNC;
    87
    88 extern char filter_accept_all(archive_handle_t *archive_handle) FAST_FUNC;
    89 extern char filter_accept_list(archive_handle_t *archive_handle) FAST_FUNC;
    90 extern char filter_accept_list_reassign(archive_handle_t *archive_handle) FAST_FUNC;
    91 extern char filter_accept_reject_list(archive_handle_t *archive_handle) FAST_FUNC;
    92
    93 extern void unpack_ar_archive(archive_handle_t *ar_archive) FAST_FUNC;
    94
    95 extern void data_skip(archive_handle_t *archive_handle) FAST_FUNC;
    96 extern void data_extract_all(archive_handle_t *archive_handle) FAST_FUNC;
    97 extern void data_extract_to_stdout(archive_handle_t *archive_handle) FAST_FUNC;
    98 extern void data_extract_to_buffer(archive_handle_t *archive_handle) FAST_FUNC;
    99
    100 extern void header_skip(const file_header_t *file_header) FAST_FUNC;
    101 extern void header_list(const file_header_t *file_header) FAST_FUNC;
    102 extern void header_verbose_list(const file_header_t *file_header) FAST_FUNC;
    103
    104 extern char get_header_ar(archive_handle_t *archive_handle) FAST_FUNC;
    105 extern char get_header_cpio(archive_handle_t *archive_handle) FAST_FUNC;
    106 extern char get_header_tar(archive_handle_t *archive_handle) FAST_FUNC;
    107 extern char get_header_tar_gz(archive_handle_t *archive_handle) FAST_FUNC;
    108 extern char get_header_tar_bz2(archive_handle_t *archive_handle) FAST_FUNC;
    109 extern char get_header_tar_lzma(archive_handle_t *archive_handle) FAST_FUNC;
    110
    111 extern void seek_by_jump(const archive_handle_t *archive_handle, unsigned amount) FAST_FUNC;
    112 extern void seek_by_read(const archive_handle_t *archive_handle, unsigned amount) FAST_FUNC;
    113
    114 extern void data_align(archive_handle_t *archive_handle, unsigned boundary) FAST_FUNC;
    115 extern const llist_t *find_list_entry(const llist_t *list, const char *filename) FAST_FUNC;
    116 extern const llist_t *find_list_entry2(const llist_t *list, const char *filename) FAST_FUNC;
    117
    118 /* A bit of bunzip2 internals are exposed for compressed help support: */
    119 typedef struct bunzip_data bunzip_data;
    120 int start_bunzip(bunzip_data **bdp, int in_fd, const unsigned char *inbuf, int len) FAST_FUNC;
    121 int read_bunzip(bunzip_data *bd, char *outbuf, int len) FAST_FUNC;
    122 void dealloc_bunzip(bunzip_data *bd) FAST_FUNC;
    123
    124 typedef struct inflate_unzip_result {
    125 off_t bytes_out;
    126 uint32_t crc;
    127 } inflate_unzip_result;
    128
    129 USE_DESKTOP(long long) int inflate_unzip(inflate_unzip_result *res, off_t compr_size, int src_fd, int dst_fd) FAST_FUNC;
    130 /* lzma unpacker takes .lzma stream from offset 0 */
    131 USE_DESKTOP(long long) int unpack_lzma_stream(int src_fd, int dst_fd) FAST_FUNC;
    132 /* the rest wants 2 first bytes already skipped by the caller */
    133 USE_DESKTOP(long long) int unpack_bz2_stream(int src_fd, int dst_fd) FAST_FUNC;
    134 USE_DESKTOP(long long) int unpack_gz_stream(int src_fd, int dst_fd) FAST_FUNC;
    135 USE_DESKTOP(long long) int unpack_gz_stream_with_info(int src_fd, int dst_fd, unpack_info_t *info) FAST_FUNC;
    136 USE_DESKTOP(long long) int unpack_Z_stream(int fd_in, int fd_out) FAST_FUNC;
    137 /* wrapper which checks first two bytes to be "BZ" */
    138 USE_DESKTOP(long long) int unpack_bz2_stream_prime(int src_fd, int dst_fd) FAST_FUNC;
    139
    140 int bbunpack(char **argv,
    141 char* (*make_new_name)(char *filename),
    142 USE_DESKTOP(long long) int (*unpacker)(unpack_info_t *info)) FAST_FUNC;
    143
    144 #if BB_MMU
    145 void open_transformer(int fd,
    146 USE_DESKTOP(long long) int FAST_FUNC (*transformer)(int src_fd, int dst_fd)) FAST_FUNC;
    147 #define open_transformer(fd, transformer, transform_prog) open_transformer(fd, transformer)
    148 #else
    149 void open_transformer(int src_fd, const char *transform_prog) FAST_FUNC;
    150 #define open_transformer(fd, transformer, transform_prog) open_transformer(fd, transform_prog)
    151 #endif
    152
    153 #if __GNUC_PREREQ(4,1)
    154 # pragma GCC visibility pop
    155 #endif
    156
    157 #endif