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    Contents of /trunk/mkinitrd-magellan/busybox/include/unarchive.h

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    Revision 984 - (show annotations) (download)
    Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
    File MIME type: text/plain
    File size: 6160 byte(s) 
    -updated to busybox-1.16.1 and enabled blkid/uuid support in default config
    1 /* vi: set sw=4 ts=4: */
    2 #ifndef UNARCHIVE_H
    3 #define UNARCHIVE_H 1
    4
    5 PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
    6
    7 typedef struct file_header_t {
    8 char *name;
    9 char *link_target;
    10 #if ENABLE_FEATURE_TAR_UNAME_GNAME
    11 char *tar__uname;
    12 char *tar__gname;
    13 #endif
    14 off_t size;
    15 uid_t uid;
    16 gid_t gid;
    17 mode_t mode;
    18 time_t mtime;
    19 dev_t device;
    20 } file_header_t;
    21
    22 struct hardlinks_t;
    23
    24 typedef struct archive_handle_t {
    25 /* Flags. 1st since it is most used member */
    26 unsigned ah_flags;
    27
    28 /* The raw stream as read from disk or stdin */
    29 int src_fd;
    30
    31 /* Define if the header and data component should be processed */
    32 char FAST_FUNC (*filter)(struct archive_handle_t *);
    33 /* List of files that have been accepted */
    34 llist_t *accept;
    35 /* List of files that have been rejected */
    36 llist_t *reject;
    37 /* List of files that have successfully been worked on */
    38 llist_t *passed;
    39
    40 /* Currently processed file's header */
    41 file_header_t *file_header;
    42
    43 /* Process the header component, e.g. tar -t */
    44 void FAST_FUNC (*action_header)(const file_header_t *);
    45
    46 /* Process the data component, e.g. extract to filesystem */
    47 void FAST_FUNC (*action_data)(struct archive_handle_t *);
    48
    49 /* Function that skips data */
    50 void FAST_FUNC (*seek)(int fd, off_t amount);
    51
    52 /* Count processed bytes */
    53 off_t offset;
    54
    55 /* Archiver specific. Can make it a union if it ever gets big */
    56 #if ENABLE_TAR || ENABLE_DPKG || ENABLE_DPKG_DEB
    57 smallint tar__end;
    58 # if ENABLE_FEATURE_TAR_GNU_EXTENSIONS
    59 char* tar__longname;
    60 char* tar__linkname;
    61 # endif
    62 #endif
    63 #if ENABLE_CPIO || ENABLE_RPM2CPIO || ENABLE_RPM
    64 uoff_t cpio__blocks;
    65 struct hardlinks_t *cpio__hardlinks_to_create;
    66 struct hardlinks_t *cpio__created_hardlinks;
    67 #endif
    68 #if ENABLE_DPKG || ENABLE_DPKG_DEB
    69 /* Temporary storage */
    70 char *dpkg__buffer;
    71 /* How to process any sub archive, e.g. get_header_tar_gz */
    72 char FAST_FUNC (*dpkg__action_data_subarchive)(struct archive_handle_t *);
    73 /* Contains the handle to a sub archive */
    74 struct archive_handle_t *dpkg__sub_archive;
    75 #endif
    76 } archive_handle_t;
    77 /* bits in ah_flags */
    78 #define ARCHIVE_RESTORE_DATE (1 << 0)
    79 #define ARCHIVE_CREATE_LEADING_DIRS (1 << 1)
    80 #define ARCHIVE_UNLINK_OLD (1 << 2)
    81 #define ARCHIVE_EXTRACT_QUIET (1 << 3)
    82 #define ARCHIVE_EXTRACT_NEWER (1 << 4)
    83 #define ARCHIVE_DONT_RESTORE_OWNER (1 << 5)
    84 #define ARCHIVE_DONT_RESTORE_PERM (1 << 6)
    85 #define ARCHIVE_NUMERIC_OWNER (1 << 7)
    86 #define ARCHIVE_O_TRUNC (1 << 8)
    87
    88
    89 /* Info struct unpackers can fill out to inform users of thing like
    90 * timestamps of unpacked files */
    91 typedef struct unpack_info_t {
    92 time_t mtime;
    93 } unpack_info_t;
    94
    95 extern archive_handle_t *init_handle(void) FAST_FUNC;
    96
    97 extern char filter_accept_all(archive_handle_t *archive_handle) FAST_FUNC;
    98 extern char filter_accept_list(archive_handle_t *archive_handle) FAST_FUNC;
    99 extern char filter_accept_list_reassign(archive_handle_t *archive_handle) FAST_FUNC;
    100 extern char filter_accept_reject_list(archive_handle_t *archive_handle) FAST_FUNC;
    101
    102 extern void unpack_ar_archive(archive_handle_t *ar_archive) FAST_FUNC;
    103
    104 extern void data_skip(archive_handle_t *archive_handle) FAST_FUNC;
    105 extern void data_extract_all(archive_handle_t *archive_handle) FAST_FUNC;
    106 extern void data_extract_to_stdout(archive_handle_t *archive_handle) FAST_FUNC;
    107
    108 extern void header_skip(const file_header_t *file_header) FAST_FUNC;
    109 extern void header_list(const file_header_t *file_header) FAST_FUNC;
    110 extern void header_verbose_list(const file_header_t *file_header) FAST_FUNC;
    111
    112 extern char get_header_ar(archive_handle_t *archive_handle) FAST_FUNC;
    113 extern char get_header_cpio(archive_handle_t *archive_handle) FAST_FUNC;
    114 extern char get_header_tar(archive_handle_t *archive_handle) FAST_FUNC;
    115 extern char get_header_tar_gz(archive_handle_t *archive_handle) FAST_FUNC;
    116 extern char get_header_tar_bz2(archive_handle_t *archive_handle) FAST_FUNC;
    117 extern char get_header_tar_lzma(archive_handle_t *archive_handle) FAST_FUNC;
    118
    119 extern void seek_by_jump(int fd, off_t amount) FAST_FUNC;
    120 extern void seek_by_read(int fd, off_t amount) FAST_FUNC;
    121
    122 extern void data_align(archive_handle_t *archive_handle, unsigned boundary) FAST_FUNC;
    123 extern const llist_t *find_list_entry(const llist_t *list, const char *filename) FAST_FUNC;
    124 extern const llist_t *find_list_entry2(const llist_t *list, const char *filename) FAST_FUNC;
    125
    126 /* A bit of bunzip2 internals are exposed for compressed help support: */
    127 typedef struct bunzip_data bunzip_data;
    128 int start_bunzip(bunzip_data **bdp, int in_fd, const unsigned char *inbuf, int len) FAST_FUNC;
    129 int read_bunzip(bunzip_data *bd, char *outbuf, int len) FAST_FUNC;
    130 void dealloc_bunzip(bunzip_data *bd) FAST_FUNC;
    131
    132 typedef struct inflate_unzip_result {
    133 off_t bytes_out;
    134 uint32_t crc;
    135 } inflate_unzip_result;
    136
    137 IF_DESKTOP(long long) int inflate_unzip(inflate_unzip_result *res, off_t compr_size, int src_fd, int dst_fd) FAST_FUNC;
    138 /* lzma unpacker takes .lzma stream from offset 0 */
    139 IF_DESKTOP(long long) int unpack_lzma_stream(int src_fd, int dst_fd) FAST_FUNC;
    140 /* the rest wants 2 first bytes already skipped by the caller */
    141 IF_DESKTOP(long long) int unpack_bz2_stream(int src_fd, int dst_fd) FAST_FUNC;
    142 IF_DESKTOP(long long) int unpack_gz_stream(int src_fd, int dst_fd) FAST_FUNC;
    143 IF_DESKTOP(long long) int unpack_gz_stream_with_info(int src_fd, int dst_fd, unpack_info_t *info) FAST_FUNC;
    144 IF_DESKTOP(long long) int unpack_Z_stream(int fd_in, int fd_out) FAST_FUNC;
    145 /* wrapper which checks first two bytes to be "BZ" */
    146 IF_DESKTOP(long long) int unpack_bz2_stream_prime(int src_fd, int dst_fd) FAST_FUNC;
    147
    148 int bbunpack(char **argv,
    149 char* (*make_new_name)(char *filename),
    150 IF_DESKTOP(long long) int (*unpacker)(unpack_info_t *info)) FAST_FUNC;
    151
    152 #if BB_MMU
    153 void open_transformer(int fd,
    154 IF_DESKTOP(long long) int FAST_FUNC (*transformer)(int src_fd, int dst_fd)) FAST_FUNC;
    155 #define open_transformer(fd, transformer, transform_prog) open_transformer(fd, transformer)
    156 #else
    157 void open_transformer(int src_fd, const char *transform_prog) FAST_FUNC;
    158 #define open_transformer(fd, transformer, transform_prog) open_transformer(fd, transform_prog)
    159 #endif
    160
    161 POP_SAVED_FUNCTION_VISIBILITY
    162
    163 #endif