1 .\" Copyright (c) 2003-2011 Tim Kientzle
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28 .Dt ARCHIVE_READ_FILTER 3
31 .Nm archive_read_support_filter_all ,
32 .Nm archive_read_support_filter_bzip2 ,
33 .Nm archive_read_support_filter_compress ,
34 .Nm archive_read_support_filter_gzip ,
35 .Nm archive_read_support_filter_lzma ,
36 .Nm archive_read_support_filter_none ,
37 .Nm archive_read_support_filter_xz ,
38 .Nm archive_read_support_filter_program ,
39 .Nm archive_read_support_filter_program_signature
40 .Nd functions for reading streaming archives
43 Streaming Archive Library (libarchive, -larchive)
47 .Fn archive_read_support_filter_all "struct archive *"
49 .Fn archive_read_support_filter_bzip2 "struct archive *"
51 .Fn archive_read_support_filter_compress "struct archive *"
53 .Fn archive_read_support_filter_gzip "struct archive *"
55 .Fn archive_read_support_filter_lzma "struct archive *"
57 .Fn archive_read_support_filter_none "struct archive *"
59 .Fn archive_read_support_filter_xz "struct archive *"
61 .Fo archive_read_support_filter_program
62 .Fa "struct archive *"
66 .Fo archive_read_support_filter_program_signature
67 .Fa "struct archive *"
69 .Fa "const void *signature"
70 .Fa "size_t signature_length"
74 .Bl -tag -compact -width indent
76 .Fn archive_read_support_filter_bzip2 ,
77 .Fn archive_read_support_filter_compress ,
78 .Fn archive_read_support_filter_gzip ,
79 .Fn archive_read_support_filter_lzma ,
80 .Fn archive_read_support_filter_none ,
81 .Fn archive_read_support_filter_xz
83 Enables auto-detection code and decompression support for the
84 specified compression.
85 These functions may fall back on external programs if an appropriate
86 library was not available at build time.
87 Decompression using an external program is usually slower than
88 decompression through built-in libraries.
91 is always enabled by default.
92 .It Fn archive_read_support_filter_all
93 Enables all available decompression filters.
94 .It Fn archive_read_support_filter_program
95 Data is fed through the specified external program before being dearchived.
96 Note that this disables automatic detection of the compression format,
97 so it makes no sense to specify this in conjunction with any other
99 .It Fn archive_read_support_filter_program_signature
100 This feeds data through the specified external program
101 but only if the initial bytes of the data match the specified
108 These functions return
110 if the compression is fully supported,
112 if the compression is supported only through an external program.
114 .Fn archive_read_support_filter_none
118 Detailed error codes and textual descriptions are available from the
121 .Fn archive_error_string
127 .Xr archive_read_data 3 ,
128 .Xr archive_read_format 3 ,
129 .Xr archive_read_format 3