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