.\" Copyright (c) 2003-2011 Tim Kientzle

.\" All rights reserved.

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.\" $FreeBSD$

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.Dd August 14, 2014

.Dt ARCHIVE_READ_FILTER 3

.Os

.Sh NAME

.Nm archive_read_support_filter_all ,

.Nm archive_read_support_filter_bzip2 ,

.Nm archive_read_support_filter_compress ,

.Nm archive_read_support_filter_gzip ,

.Nm archive_read_support_filter_lz4 ,

.Nm archive_read_support_filter_lzma ,

.Nm archive_read_support_filter_none ,

.Nm archive_read_support_filter_rpm ,

.Nm archive_read_support_filter_uu ,

.Nm archive_read_support_filter_xz ,

.Nm archive_read_support_filter_program ,

.Nm archive_read_support_filter_program_signature

.Nd functions for reading streaming archives

.\"

.Sh LIBRARY

Streaming Archive Library (libarchive, -larchive)

.Sh SYNOPSIS

.In archive.h

.Ft int

.Fn archive_read_support_filter_all "struct archive *"

.Ft int

.Fn archive_read_support_filter_bzip2 "struct archive *"

.Ft int

.Fn archive_read_support_filter_compress "struct archive *"

.Ft int

.Fn archive_read_support_filter_grzip "struct archive *"

.Ft int

.Fn archive_read_support_filter_gzip "struct archive *"

.Ft int

.Fn archive_read_support_filter_lrzip "struct archive *"

.Ft int

.Fn archive_read_support_filter_lz4 "struct archive *"

.Ft int

.Fn archive_read_support_filter_lzma "struct archive *"

.Ft int

.Fn archive_read_support_filter_lzop "struct archive *"

.Ft int

.Fn archive_read_support_filter_none "struct archive *"

.Ft int

.Fn archive_read_support_filter_rpm "struct archive *"

.Ft int

.Fn archive_read_support_filter_uu "struct archive *"

.Ft int

.Fn archive_read_support_filter_xz "struct archive *"

.Ft int

.Fo archive_read_support_filter_program

.Fa "struct archive *"

.Fa "const char *cmd"

.Fc

.Ft int

.Fo archive_read_support_filter_program_signature

.Fa "struct archive *"

.Fa "const char *cmd"

.Fa "const void *signature"

.Fa "size_t signature_length"

.Fc

.\"

.Sh DESCRIPTION

.Bl -tag -compact -width indent

.It Xo

.Fn archive_read_support_filter_bzip2 ,

.Fn archive_read_support_filter_compress ,

.Fn archive_read_support_filter_grzip ,

.Fn archive_read_support_filter_gzip ,

.Fn archive_read_support_filter_lrzip ,

.Fn archive_read_support_filter_lz4 ,

.Fn archive_read_support_filter_lzma ,

.Fn archive_read_support_filter_lzop ,

.Fn archive_read_support_filter_none ,

.Fn archive_read_support_filter_rpm ,

.Fn archive_read_support_filter_uu ,

.Fn archive_read_support_filter_xz

.Xc

Enables auto-detection code and decompression support for the

specified compression.

These functions may fall back on external programs if an appropriate

library was not available at build time.

Decompression using an external program is usually slower than

decompression through built-in libraries.

Note that

.Dq none

is always enabled by default.

.It Fn archive_read_support_filter_all

Enables all available decompression filters.

.It Fn archive_read_support_filter_program

Data is fed through the specified external program before being dearchived.

Note that this disables automatic detection of the compression format,

so it makes no sense to specify this in conjunction with any other

decompression option.

.It Fn archive_read_support_filter_program_signature

This feeds data through the specified external program

but only if the initial bytes of the data match the specified

signature value.

.El

.\"

.\". Sh EXAMPLE

.\"

.Sh RETURN VALUES

These functions return

.Cm ARCHIVE_OK

if the compression is fully supported,

.Cm ARCHIVE_WARN

if the compression is supported only through an external program.

.Pp

.Fn archive_read_support_filter_none

always succeeds.

.\"

.Sh ERRORS

Detailed error codes and textual descriptions are available from the

.Fn archive_errno

and

.Fn archive_error_string

functions.

.\"

.Sh SEE ALSO

.Xr libarchive 3 ,

.Xr archive_read 3 ,

.Xr archive_read_data 3 ,

.Xr archive_read_format 3 ,

.Xr archive_read_format 3