source-git / libarchive

Clone
Source Code
GIT

Blame doc/html/archive_read_open.3.html

c8 c8s master
  1.   1d0348c96cfc3f14a424865c9ba093106955a51d
  2.   doc
  3.   html
  4.   archive_read_open.3.html
Blob History Raw
Packit Service 1d0348
Packit Service 1d0348
Packit Service 1d0348
Packit Service 1d0348 
"http://www.w3.org/TR/html4/loose.dtd">
Packit Service 1d0348 
<html>
Packit Service 1d0348 
<head>
Packit Service 1d0348 
<meta name="generator" content="groff -Thtml, see www.gnu.org">
Packit Service 1d0348 
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
Packit Service 1d0348 
<meta name="Content-Style" content="text/css">
Packit Service 1d0348 
<style type="text/css">
Packit Service 1d0348 
       p       { margin-top: 0; margin-bottom: 0; vertical-align: top }
Packit Service 1d0348 
       pre     { margin-top: 0; margin-bottom: 0; vertical-align: top }
Packit Service 1d0348 
       table   { margin-top: 0; margin-bottom: 0; vertical-align: top }
Packit Service 1d0348 
       h1      { text-align: center }
Packit Service 1d0348 
</style>
Packit Service 1d0348 
<title></title>
Packit Service 1d0348 
</head>
Packit Service 1d0348 
<body>
Packit Service 1d0348
Packit Service 1d0348
Packit Service 1d0348
Packit Service 1d0348
Packit Service 1d0348 
ARCHIVE_READ_OPEN(3) BSD Library Functions Manual
Packit Service 1d0348 
ARCHIVE_READ_OPEN(3)
Packit Service 1d0348
Packit Service 1d0348 
NAME
Packit Service 1d0348
Packit Service 1d0348 
archive_read_open,
Packit Service 1d0348 
archive_read_open2, archive_read_open_fd,
Packit Service 1d0348 
archive_read_open_FILE,
Packit Service 1d0348 
archive_read_open_filename,
Packit Service 1d0348 
archive_read_open_memory — functions for
Packit Service 1d0348 
reading streaming archives
Packit Service 1d0348
Packit Service 1d0348 
LIBRARY
Packit Service 1d0348
Packit Service 1d0348 
Streaming Archive Library
Packit Service 1d0348 
(libarchive, -larchive)
Packit Service 1d0348
Packit Service 1d0348 
SYNOPSIS
Packit Service 1d0348
Packit Service 1d0348 
#include
Packit Service 1d0348 
<archive.h>
Packit Service 1d0348
Packit Service 1d0348 
int
Packit Service 1d0348
Packit Service 1d0348
Packit Service 1d0348 
archive_read_open(struct archive *,
Packit Service 1d0348 
void *client_data,
Packit Service 1d0348 
archive_open_callback *,
Packit Service 1d0348 
archive_read_callback *,
Packit Service 1d0348 
archive_close_callback *);
Packit Service 1d0348
Packit Service 1d0348 
int
Packit Service 1d0348
Packit Service 1d0348
Packit Service 1d0348 
archive_read_open2(struct archive *,
Packit Service 1d0348 
void *client_data,
Packit Service 1d0348 
archive_open_callback *,
Packit Service 1d0348 
archive_read_callback *,
Packit Service 1d0348 
archive_skip_callback *,
Packit Service 1d0348 
archive_close_callback *);
Packit Service 1d0348
Packit Service 1d0348 
int
Packit Service 1d0348
Packit Service 1d0348
Packit Service 1d0348 
archive_read_open_FILE(struct archive *,
Packit Service 1d0348 
FILE *file);
Packit Service 1d0348
Packit Service 1d0348 
int
Packit Service 1d0348
Packit Service 1d0348
Packit Service 1d0348 
archive_read_open_fd(struct archive *,
Packit Service 1d0348 
int fd, size_t block_size);
Packit Service 1d0348
Packit Service 1d0348 
int
Packit Service 1d0348
Packit Service 1d0348
Packit Service 1d0348 
archive_read_open_filename(struct archive *,
Packit Service 1d0348 
const char *filename,
Packit Service 1d0348 
size_t block_size);
Packit Service 1d0348
Packit Service 1d0348 
int
Packit Service 1d0348
Packit Service 1d0348
Packit Service 1d0348 
archive_read_open_memory(struct archive *,
Packit Service 1d0348 
const void *buff,
Packit Service 1d0348 
size_t size);
Packit Service 1d0348
Packit Service 1d0348 
DESCRIPTION
Packit Service 1d0348 
archive_read_open()
Packit Service 1d0348
Packit Service 1d0348 
The same as
Packit Service 1d0348 
archive_read_open2(), except that the skip callback
Packit Service 1d0348 
is assumed to be NULL.
Packit Service 1d0348
Packit Service 1d0348 
archive_read_open2()
Packit Service 1d0348
Packit Service 1d0348 
Freeze the settings, open the
Packit Service 1d0348 
archive, and prepare for reading entries. This is the most
Packit Service 1d0348 
generic version of this call, which accepts four callback
Packit Service 1d0348 
functions. Most clients will want to use
Packit Service 1d0348 
archive_read_open_filename(),
Packit Service 1d0348 
archive_read_open_FILE(),
Packit Service 1d0348 
archive_read_open_fd(), or
Packit Service 1d0348 
archive_read_open_memory() instead. The library
Packit Service 1d0348 
invokes the client-provided functions to obtain raw bytes
Packit Service 1d0348 
from the archive.
Packit Service 1d0348
Packit Service 1d0348 
archive_read_open_FILE()
Packit Service 1d0348
Packit Service 1d0348 
Like
Packit Service 1d0348 
archive_read_open(), except that it accepts a FILE
Packit Service 1d0348 
* pointer. This function should not be used with tape
Packit Service 1d0348 
drives or other devices that require strict I/O
Packit Service 1d0348 
blocking.
Packit Service 1d0348
Packit Service 1d0348 
archive_read_open_fd()
Packit Service 1d0348
Packit Service 1d0348 
Like
Packit Service 1d0348 
archive_read_open(), except that it accepts a file
Packit Service 1d0348 
descriptor and block size rather than a set of function
Packit Service 1d0348 
pointers. Note that the file descriptor will not be
Packit Service 1d0348 
automatically closed at end-of-archive. This function is
Packit Service 1d0348 
safe for use with tape drives or other blocked devices.
Packit Service 1d0348
Packit Service 1d0348 
archive_read_open_file()
Packit Service 1d0348
Packit Service 1d0348 
This is a deprecated synonym
Packit Service 1d0348 
for archive_read_open_filename().
Packit Service 1d0348
Packit Service 1d0348 
archive_read_open_filename()
Packit Service 1d0348
Packit Service 1d0348 
Like
Packit Service 1d0348 
archive_read_open(), except that it accepts a simple
Packit Service 1d0348 
filename and a block size. A NULL filename represents
Packit Service 1d0348 
standard input. This function is safe for use with tape
Packit Service 1d0348 
drives or other blocked devices.
Packit Service 1d0348
Packit Service 1d0348 
archive_read_open_memory()
Packit Service 1d0348
Packit Service 1d0348 
Like
Packit Service 1d0348 
archive_read_open(), except that it accepts a pointer
Packit Service 1d0348 
and size of a block of memory containing the archive
Packit Service 1d0348 
data.
Packit Service 1d0348
Packit Service 1d0348 
A complete
Packit Service 1d0348 
description of the struct archive and struct archive_entry
Packit Service 1d0348 
objects can be found in the overview manual page for
Packit Service 1d0348 
libarchive(3).
Packit Service 1d0348
Packit Service 1d0348 
CLIENT CALLBACKS
Packit Service 1d0348
Packit Service 1d0348 
The callback functions must
Packit Service 1d0348 
match the following prototypes:
Packit Service 1d0348
Packit Service 1d0348 
typedef
Packit Service 1d0348 
la_ssize_t
Packit Service 1d0348
Packit Service 1d0348
Packit Service 1d0348 
archive_read_callback(struct archive *,
Packit Service 1d0348 
void *client_data,
Packit Service 1d0348 
const void **buffer)
Packit Service 1d0348
Packit Service 1d0348 
typedef
Packit Service 1d0348 
la_int64_t
Packit Service 1d0348
Packit Service 1d0348
Packit Service 1d0348 
archive_skip_callback(struct archive *,
Packit Service 1d0348 
void *client_data,
Packit Service 1d0348 
off_t request)
Packit Service 1d0348
Packit Service 1d0348 
typedef
Packit Service 1d0348 
int archive_open_callback(struct archive
Packit Service 1d0348 
*, void *client_data)
Packit Service 1d0348
Packit Service 1d0348 
typedef
Packit Service 1d0348 
int archive_close_callback(struct archive
Packit Service 1d0348 
*, void *client_data)
Packit Service 1d0348
Packit Service 1d0348 
The open
Packit Service 1d0348 
callback is invoked by archive_open(). It should
Packit Service 1d0348 
return ARCHIVE_OK if the underlying file or data
Packit Service 1d0348 
source is successfully opened. If the open fails, it should
Packit Service 1d0348 
call archive_set_error() to register an error code
Packit Service 1d0348 
and message and return ARCHIVE_FATAL.
Packit Service 1d0348
Packit Service 1d0348 
The read
Packit Service 1d0348 
callback is invoked whenever the library requires raw bytes
Packit Service 1d0348 
from the archive. The read callback should read data into a
Packit Service 1d0348 
buffer, set the const void **buffer argument to point to the
Packit Service 1d0348 
available data, and return a count of the number of bytes
Packit Service 1d0348 
available. The library will invoke the read callback again
Packit Service 1d0348 
only after it has consumed this data. The library imposes no
Packit Service 1d0348 
constraints on the size of the data blocks returned. On
Packit Service 1d0348 
end-of-file, the read callback should return zero. On error,
Packit Service 1d0348 
the read callback should invoke archive_set_error()
Packit Service 1d0348 
to register an error code and message and return -1.
Packit Service 1d0348
Packit Service 1d0348 
The skip
Packit Service 1d0348 
callback is invoked when the library wants to ignore a block
Packit Service 1d0348 
of data. The return value is the number of bytes actually
Packit Service 1d0348 
skipped, which may differ from the request. If the callback
Packit Service 1d0348 
cannot skip data, it should return zero. If the skip
Packit Service 1d0348 
callback is not provided (the function pointer is NULL ),
Packit Service 1d0348 
the library will invoke the read function instead and simply
Packit Service 1d0348 
discard the result. A skip callback can provide significant
Packit Service 1d0348 
performance gains when reading uncompressed archives from
Packit Service 1d0348 
slow disk drives or other media that can skip quickly.
Packit Service 1d0348
Packit Service 1d0348 
The close
Packit Service 1d0348 
callback is invoked by archive_close when the archive
Packit Service 1d0348 
processing is complete. The callback should return
Packit Service 1d0348 
ARCHIVE_OK on success. On failure, the callback
Packit Service 1d0348 
should invoke archive_set_error() to register an
Packit Service 1d0348 
error code and message and return ARCHIVE_FATAL.
Packit Service 1d0348
Packit Service 1d0348 
RETURN VALUES
Packit Service 1d0348
Packit Service 1d0348 
These functions return
Packit Service 1d0348 
ARCHIVE_OK on success, or ARCHIVE_FATAL.
Packit Service 1d0348
Packit Service 1d0348 
ERRORS
Packit Service 1d0348
Packit Service 1d0348 
Detailed error codes and textual
Packit Service 1d0348 
descriptions are available from the archive_errno()
Packit Service 1d0348 
and archive_error_string() functions.
Packit Service 1d0348
Packit Service 1d0348 
SEE ALSO
Packit Service 1d0348
Packit Service 1d0348 
tar(1), libarchive(3),
Packit Service 1d0348 
archive_read(3), archive_read_data(3),
Packit Service 1d0348 
archive_read_filter(3), archive_read_format(3),
Packit Service 1d0348 
archive_read_set_options(3), archive_util(3), tar(5)
Packit Service 1d0348
Packit Service 1d0348 
BSD
Packit Service 1d0348 
February 2, 2012 BSD
Packit Service 1d0348
Packit Service 1d0348 
</body>
Packit Service 1d0348 
</html>

Powered by Pagure 5.14.1

SSH Hostkey/Fingerprint | Documentation