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Merge r991 from libarchive.googlecode.com: Various updates

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to archive_read.3 manpage, including documentation for the
new "raw" handler.
This commit is contained in:
Tim Kientzle 2009-04-27 20:13:13 +00:00
parent 690f5ebdc0
commit 4d24dc3687
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=191595
1 changed files with 55 additions and 8 deletions
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63
lib/libarchive/archive_read.3
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@ -24,7 +24,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd August 19, 2006
.Dd April 13, 2009
.Dt archive_read 3
.Os
.Sh NAME
@ -36,12 +36,18 @@
.Nm archive_read_support_compression_bzip2 ,
.Nm archive_read_support_compression_compress ,
.Nm archive_read_support_compression_gzip ,
.Nm archive_read_support_compression_lzma ,
.Nm archive_read_support_compression_none ,
.Nm archive_read_support_compression_xz ,
.Nm archive_read_support_compression_program ,
.Nm archive_read_support_compression_program_signature ,
.Nm archive_read_support_format_all ,
.Nm archive_read_support_format_ar ,
.Nm archive_read_support_format_cpio ,
.Nm archive_read_support_format_empty ,
.Nm archive_read_support_format_iso9660 ,
.Nm archive_read_support_format_mtree,
.Nm archive_read_support_format_raw,
.Nm archive_read_support_format_tar ,
.Nm archive_read_support_format_zip ,
.Nm archive_read_open ,
@ -78,21 +84,38 @@
.Ft int
.Fn archive_read_support_compression_gzip "struct archive *"
.Ft int
.Fn archive_read_support_compression_lzma "struct archive *"
.Ft int
.Fn archive_read_support_compression_none "struct archive *"
.Ft int
.Fn archive_read_support_compression_xz "struct archive *"
.Ft int
.Fo archive_read_support_compression_program
.Fa "struct archive *"
.Fa "const char *cmd"
.Fc
.Ft int
.Fo archive_read_support_compression_program_signature
.Fa "struct archive *"
.Fa "const char *cmd"
.Fa "const void *signature"
.Fa "size_t signature_length"
.Fc
.Ft int
.Fn archive_read_support_format_all "struct archive *"
.Ft int
.Fn archive_read_support_format_ar "struct archive *"
.Ft int
.Fn archive_read_support_format_cpio "struct archive *"
.Ft int
.Fn archive_read_support_format_empty "struct archive *"
.Ft int
.Fn archive_read_support_format_iso9660 "struct archive *"
.Ft int
.Fn archive_read_support_format_mtree "struct archive *"
.Ft int
.Fn archive_read_support_format_raw "struct archive *"
.Ft int
.Fn archive_read_support_format_tar "struct archive *"
.Ft int
.Fn archive_read_support_format_zip "struct archive *"
@ -189,30 +212,43 @@ Allocates and initializes a
.Tn struct archive
object suitable for reading from an archive.
.It Xo
.Fn archive_read_support_compression_all ,
.Fn archive_read_support_compression_bzip2 ,
.Fn archive_read_support_compression_compress ,
.Fn archive_read_support_compression_gzip ,
.Fn archive_read_support_compression_none
.Fn archive_read_support_compression_lzma ,
.Fn archive_read_support_compression_none ,
.Fn archive_read_support_compression_xz
.Xc
Enables auto-detection code and decompression support for the
specified compression.
Returns
.Cm ARCHIVE_OK
if the compression is fully supported, or
.Cm ARCHIVE_WARN
if the compression is supported only through an external program.
Note that decompression using an external program is usually slower than
decompression through built-in libraries.
Note that
.Dq none
is always enabled by default.
For convenience,
.Fn archive_read_support_compression_all
enables all available decompression code.
.It Fn archive_read_support_compression_all
Enables all available decompression filters.
.It Fn archive_read_support_compression_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_compression_program_signature
This feeds data through the specified external program
but only if the initial bytes of the data match the specified
signature value.
.It Xo
.Fn archive_read_support_format_all ,
.Fn archive_read_support_format_ar ,
.Fn archive_read_support_format_cpio ,
.Fn archive_read_support_format_empty ,
.Fn archive_read_support_format_iso9660 ,
.Fn archive_read_support_format_mtree ,
.Fn archive_read_support_format_tar ,
.Fn archive_read_support_format_zip
.Xc
@ -226,6 +262,17 @@ For convenience,
.Fn archive_read_support_format_all
enables support for all available formats.
Only empty archives are supported by default.
.It Fn archive_read_support_format_raw
The
.Dq raw
format handler allows libarchive to be used to read arbitrary data.
It treats any data stream as an archive with a single entry.
The pathname of this entry is
.Dq data ;
all other entry fields are unset.
This is not enabled by
.Fn archive_read_support_format_all
in order to avoid erroneous handling of damaged archives.
.It Xo
.Fn archive_read_set_filter_options ,
.Fn archive_read_set_format_options ,
@ -322,9 +369,9 @@ a
.Tn struct archive_entry .
This is a convenience wrapper around
.Fn archive_read_next_header2
that uses an internal
that reuses an internal
.Tn struct archive_entry
object.
object for each request.
.It Fn archive_read_next_header2
Read the header for the next entry and populate the provided
.Tn struct archive_entry .