1/* vi: set sw=4 ts=4: */ 2#ifndef __UNARCHIVE_H__ 3#define __UNARCHIVE_H__ 4 5#define ARCHIVE_PRESERVE_DATE 1 6#define ARCHIVE_CREATE_LEADING_DIRS 2 7#define ARCHIVE_EXTRACT_UNCONDITIONAL 4 8#define ARCHIVE_EXTRACT_QUIET 8 9#define ARCHIVE_EXTRACT_NEWER 16 10#define ARCHIVE_NOPRESERVE_OWN 32 11#define ARCHIVE_NOPRESERVE_PERM 64 12 13typedef struct file_header_t { 14 char *name; 15 char *link_target; 16 off_t size; 17 uid_t uid; 18 gid_t gid; 19 mode_t mode; 20 time_t mtime; 21 dev_t device; 22} file_header_t; 23 24typedef struct archive_handle_t { 25 /* define if the header and data component should be processed */ 26 char (*filter)(struct archive_handle_t *); 27 llist_t *accept; 28 /* List of files that have been rejected */ 29 llist_t *reject; 30 /* List of files that have successfully been worked on */ 31 llist_t *passed; 32 33 /* Contains the processed header entry */ 34 file_header_t *file_header; 35 36 /* process the header component, e.g. tar -t */ 37 void (*action_header)(const file_header_t *); 38 39 /* process the data component, e.g. extract to filesystem */ 40 void (*action_data)(struct archive_handle_t *); 41 42 /* How to process any sub archive, e.g. get_header_tar_gz */ 43 char (*action_data_subarchive)(struct archive_handle_t *); 44 45 /* Contains the handle to a sub archive */ 46 struct archive_handle_t *sub_archive; 47 48 /* The raw stream as read from disk or stdin */ 49 int src_fd; 50 51 /* Count the number of bytes processed */ 52 off_t offset; 53 54 /* Function that skips data: read_by_char or read_by_skip */ 55 void (*seek)(const struct archive_handle_t *archive_handle, const unsigned amount); 56 57 /* Temporary storage */ 58 char *buffer; 59 60 /* Flags and misc. stuff */ 61 unsigned char flags; 62 63} archive_handle_t; 64 65 66extern archive_handle_t *init_handle(void); 67 68extern char filter_accept_all(archive_handle_t *archive_handle); 69extern char filter_accept_list(archive_handle_t *archive_handle); 70extern char filter_accept_list_reassign(archive_handle_t *archive_handle); 71extern char filter_accept_reject_list(archive_handle_t *archive_handle); 72 73extern void unpack_ar_archive(archive_handle_t *ar_archive); 74 75extern void data_skip(archive_handle_t *archive_handle); 76extern void data_extract_all(archive_handle_t *archive_handle); 77extern void data_extract_to_stdout(archive_handle_t *archive_handle); 78extern void data_extract_to_buffer(archive_handle_t *archive_handle); 79 80extern void header_skip(const file_header_t *file_header); 81extern void header_list(const file_header_t *file_header); 82extern void header_verbose_list(const file_header_t *file_header); 83 84extern void check_header_gzip_or_die(int src_fd); 85 86extern char get_header_ar(archive_handle_t *archive_handle); 87extern char get_header_cpio(archive_handle_t *archive_handle); 88extern char get_header_tar(archive_handle_t *archive_handle); 89extern char get_header_tar_bz2(archive_handle_t *archive_handle); 90extern char get_header_tar_lzma(archive_handle_t *archive_handle); 91extern char get_header_tar_gz(archive_handle_t *archive_handle); 92 93extern void seek_by_jump(const archive_handle_t *archive_handle, const unsigned amount); 94extern void seek_by_read(const archive_handle_t *archive_handle, const unsigned amount); 95 96extern ssize_t archive_xread_all_eof(archive_handle_t *archive_handle, unsigned char *buf, size_t count); 97 98extern void data_align(archive_handle_t *archive_handle, const unsigned short boundary); 99extern const llist_t *find_list_entry(const llist_t *list, const char *filename); 100extern const llist_t *find_list_entry2(const llist_t *list, const char *filename); 101 102/* A bit of bunzip2 internals are exposed for compressed help support: */ 103typedef struct bunzip_data bunzip_data; 104int start_bunzip(bunzip_data **bdp, int in_fd, const unsigned char *inbuf, int len); 105int read_bunzip(bunzip_data *bd, char *outbuf, int len); 106void dealloc_bunzip(bunzip_data *bd); 107 108typedef struct inflate_unzip_result { 109 off_t bytes_out; 110 uint32_t crc; 111} inflate_unzip_result; 112 113extern USE_DESKTOP(long long) int unpack_bz2_stream(int src_fd, int dst_fd); 114extern USE_DESKTOP(long long) int inflate_unzip(inflate_unzip_result *res, unsigned bufsize, int src_fd, int dst_fd); 115extern USE_DESKTOP(long long) int unpack_gz_stream(int src_fd, int dst_fd); 116extern USE_DESKTOP(long long) int unpack_lzma_stream(int src_fd, int dst_fd); 117 118#if BB_MMU 119extern int open_transformer(int src_fd, 120 USE_DESKTOP(long long) int (*transformer)(int src_fd, int dst_fd)); 121#define open_transformer(src_fd, transformer, transform_prog, ...) open_transformer(src_fd, transformer) 122#else 123extern int open_transformer(int src_fd, const char *transform_prog, ...); 124#define open_transformer(src_fd, transformer, transform_prog, ...) open_transformer(src_fd, transform_prog, __VA_ARGS__) 125#endif 126 127#endif 128