.\" Copyright (c) 2003-2011 Tim Kientzle
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.Dd August 14, 2014
.Dt ARCHIVE_WRITE_FILTER 3
.Os
.Sh NAME
.Nm archive_write_add_filter_b64encode ,
.Nm archive_write_add_filter_by_name ,
.Nm archive_write_add_filter_bzip2 ,
.Nm archive_write_add_filter_compress ,
.Nm archive_write_add_filter_grzip ,
.Nm archive_write_add_filter_gzip ,
.Nm archive_write_add_filter_lrzip ,
.Nm archive_write_add_filter_lz4 ,
.Nm archive_write_add_filter_lzip ,
.Nm archive_write_add_filter_lzma ,
.Nm archive_write_add_filter_lzop ,
.Nm archive_write_add_filter_none ,
.Nm archive_write_add_filter_program ,
.Nm archive_write_add_filter_uuencode ,
.Nm archive_write_add_filter_xz ,
.Nm archive_write_add_filter_zstd
.Nd functions enabling output filters
.Sh LIBRARY
Streaming Archive Library (libarchive, -larchive)
.Sh SYNOPSIS
.In archive.h
.Ft int
.Fn archive_write_add_filter_b64encode "struct archive *"
.Ft int
.Fn archive_write_add_filter_bzip2 "struct archive *"
.Ft int
.Fn archive_write_add_filter_compress "struct archive *"
.Ft int
.Fn archive_write_add_filter_grzip "struct archive *"
.Ft int
.Fn archive_write_add_filter_gzip "struct archive *"
.Ft int
.Fn archive_write_add_filter_lrzip "struct archive *"
.Ft int
.Fn archive_write_add_filter_lz4 "struct archive *"
.Ft int
.Fn archive_write_add_filter_lzip "struct archive *"
.Ft int
.Fn archive_write_add_filter_lzma "struct archive *"
.Ft int
.Fn archive_write_add_filter_lzop "struct archive *"
.Ft int
.Fn archive_write_add_filter_none "struct archive *"
.Ft int
.Fn archive_write_add_filter_program "struct archive *" "const char * cmd"
.Ft int
.Fn archive_write_add_filter_uuencode "struct archive *"
.Ft int
.Fn archive_write_add_filter_xz "struct archive *"
.Ft int
.Fn archive_write_add_filter_zstd "struct archive *"
.Sh DESCRIPTION
.Bl -tag -width indent
.It Xo
.Fn archive_write_add_filter_bzip2 ,
.Fn archive_write_add_filter_compress ,
.Fn archive_write_add_filter_grzip ,
.Fn archive_write_add_filter_gzip ,
.Fn archive_write_add_filter_lrzip ,
.Fn archive_write_add_filter_lz4 ,
.Fn archive_write_add_filter_lzip ,
.Fn archive_write_add_filter_lzma ,
.Fn archive_write_add_filter_lzop ,
.Fn archive_write_add_filter_xz ,
.Fn archive_write_add_filter_zstd ,
.Xc
The resulting archive will be compressed as specified.
Note that the compressed output is always properly blocked.
.It Xo
.Fn archive_write_add_filter_b64encode ,
.Fn archive_write_add_filter_uuencode ,
.Xc
The output will be encoded as specified.
The encoded output is always properly blocked.
.It Fn archive_write_add_filter_none
This is never necessary.
It is provided only for backwards compatibility.
.It Fn archive_write_add_filter_program
The archive will be fed into the specified compression program.
The output of that program is blocked and written to the client
write callbacks.
.El
.Sh RETURN VALUES
These functions return
.Cm ARCHIVE_OK
on success, or
.Cm ARCHIVE_FATAL .
.\"
.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 tar 1 ,
.Xr archive_write 3 ,
.Xr archive_write_format 3 ,
.Xr archive_write_set_options 3 ,
.Xr libarchive 3 ,
.Xr cpio 5 ,
.Xr mtree 5 ,
.Xr tar 5