zip_source_zip_file(3)

1ZIP_SOURCE_ZIP_FILE(3)   BSD Library Functions Manual   ZIP_SOURCE_ZIP_FILE(3)
2

NAME

4     zip_source_zip_file, zip_source_zip_file_create — create data source from
5     zip file
6

LIBRARY

8     libzip (-lzip)
9

SYNOPSIS

11     #include <zip.h>
12
13     zip_source_t *
14     zip_source_zip_file(zip_t *archive, zip_t *srcarchive,
15         zip_uint64_t srcidx, zip_flags_t flags, zip_uint64_t start,
16         zip_int64_t length, const char *password);
17
18     zip_source_t *
19     zip_source_zip_file_create(zip_t *srcarchive, zip_uint64_t srcidx,
20         zip_flags_t flags, zip_uint64_t start, zip_int64_t length,
21         const char *password, zip_error_t *error);
22

DESCRIPTION

24     The functions zip_source_zip_file() and zip_source_zip_file_create() cre‐
25     ate a zip source from a file in a zip archive.  The srcarchive argument
26     is the (open) zip archive containing the source zip file at index srcidx.
27     length bytes from offset start will be used in the zip_source.  If length
28     is -1, the rest of the file, starting from start, is used.
29
30     If you intend to copy a file from one archive to another, using the flag
31     ZIP_FL_COMPRESSED is more efficient, as it avoids recompressing the file
32     data.
33
34     Supported flags are:
35
36     ZIP_FL_COMPRESSED     Get the compressed data.  This is only supported if
37                           the complete file data is requested (start == 0 and
38                           length == -1).  This is not supported for changed
39                           data.  Default is uncompressed.
40
41     ZIP_FL_ENCRYPTED      Get the encrypted data.  (This flag implies
42                           ZIP_FL_COMPRESSED.)  This is only supported if the
43                           complete file data is requested (start == 0 and
44                           length == -1).  Default is decrypted.
45
46     ZIP_FL_UNCHANGED      Try to get the original data without any changes
47                           that may have been made to srcarchive after opening
48                           it.
49

RETURN VALUES

51     Upon successful completion, the created source is returned.  Otherwise,
52     NULL is returned and the error code in archive or error is set to indi‐
53     cate the error.
54

ERRORS

56     zip_source_zip_file() and zip_source_zip_file_create() fail if:
57
58     [ZIP_ER_CHANGED]   Unchanged data was requested, but it is not available.
59
60     [ZIP_ER_INVAL]     srcarchive, srcidx, start, or length are invalid.
61
62     [ZIP_ER_MEMORY]    Required memory could not be allocated.
63     Additionally, it can return all error codes from zip_stat_index() and
64     zip_fopen_index().
65

HISTORY

70     zip_source_zip_file() and zip_source_zip_file_create() were added in
71     libzip 1.10.0.
72

AUTHORS

74     Dieter Baron <dillo@nih.at> and Thomas Klausner <tk@giga.or.at>
75
76BSD                             March 10, 2023                             BSD